refactor: switched routing mode to hash

I wasn't aware that both '-' (specified by the standard) and '_' (not in the
standard, but is commonly used) can be used as the tag delimiter in locale
strings[1] when I originally wrote this commit[2].

Both "zh-CN" and "zh_CN" are valid locale strings!

Since '_' is more commonly used, I thought it was the only correct form and
thus our code only accepts it.

This commit refactors the implementation to accept both.

[1]: https://stackoverflow.com/a/36752015/14092446
[2]: f5b33af7f1

.env

@@ -1,3 +1,3 @@
-COCO_SERVER_URL=https://coco.infini.cloud  #http://localhost:9000
+COCO_SERVER_URL=http://localhost:9000 #https://coco.infini.cloud  #http://localhost:9000
 
-COCO_WEBSOCKET_URL=wss://coco.infini.cloud/ws #ws://localhost:9000/ws
+#TAURI_DEV_HOST=0.0.0.0

.github/workflows/enforce-no-dep-pizza-engine.yml

@@ -0,0 +1,18 @@
+name: Enforce no dependency pizza-engine
+
+on:
+  pull_request:
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: 
+        working-directory: ./src-tauri
+        run: |
+          # if cargo remove pizza-engine succeeds, then it is in our dependency list, fail the CI pipeline.
+          if cargo remove pizza-engine; then exit 1; fi

.github/workflows/frontend-ci.yml

@@ -0,0 +1,34 @@
+name: Frontend Code Check
+
+on:
+  pull_request:
+    # Only run it when Frontend code changes
+    paths:
+      - 'src/**'
+
+jobs:
+  check:
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, windows-latest, macos-latest]
+    
+    runs-on: ${{ matrix.platform }}
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '20'
+
+    # No need to pass the version arg as it is specified by "packageManager" in package.json
+    - name: Install pnpm
+      uses: pnpm/action-setup@v4
+
+    - name: Install dependencies
+      run: pnpm install --frozen-lockfile
+
+    - name: Build frontend
+      run: pnpm build

.github/workflows/release.yml

@@ -9,10 +9,16 @@ on:
 jobs:
   create-release:
     runs-on: ubuntu-latest
+
+    outputs:
+      APP_VERSION: ${{ steps.get-version.outputs.APP_VERSION }}
+      RELEASE_BODY: ${{ steps.get-changelog.outputs.RELEASE_BODY }}
+
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+
       - name: Set output
         id: vars
         run: echo "tag=${GITHUB_REF#refs/*/}" >> $GITHUB_OUTPUT
@@ -22,11 +28,28 @@ jobs:
         with:
           node-version: 20
 
+      - name: Get build version
+        shell: bash
+        id: get-version
+        run: |
+          PACKAGE_VERSION=$(jq -r '.version' package.json)
+          CARGO_VERSION=$(grep -m 1 '^version =' src-tauri/Cargo.toml | sed -E 's/.*"([^"]+)".*/\1/')
+          if [ "$PACKAGE_VERSION" != "$CARGO_VERSION" ]; then
+            echo "::error::Version mismatch!"
+          else
+            echo "Version match: $PACKAGE_VERSION"
+          fi
+          echo "APP_VERSION=$PACKAGE_VERSION" >> $GITHUB_OUTPUT
+
       - name: Generate changelog
-        id: create_release
-        run: npx changelogithub --draft --name ${{ steps.vars.outputs.tag }}
+        id: get-changelog
+        run: |
+          CHANGELOG_BODY=$(npx changelogithub --draft --name ${{ steps.vars.outputs.tag }})
+          echo "RELEASE_BODY<<EOF" >> $GITHUB_OUTPUT
+          echo "$CHANGELOG_BODY" >> $GITHUB_OUTPUT
+          echo "EOF" >> $GITHUB_OUTPUT
         env:
-          GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
   build-app:
     needs: create-release
@@ -50,11 +73,25 @@ jobs:
 
           - platform: "ubuntu-22.04"
             target: "x86_64-unknown-linux-gnu"
+          - platform: "ubuntu-22.04-arm"
+            target: "aarch64-unknown-linux-gnu"
+    env:
+      APP_VERSION: ${{ needs.create-release.outputs.APP_VERSION }}
 
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+
+      - name: Checkout dependency repository
+        uses: actions/checkout@v4
+        with:
+          repository: 'infinilabs/pizza'
+          ssh-key: ${{ secrets.SSH_PRIVATE_KEY }}
+          submodules: recursive
+          ref: main
+          path: pizza
+
       - name: Setup node
         uses: actions/setup-node@v4
         with:
@@ -63,17 +100,31 @@ jobs:
         with:
           version: latest
 
-      - name: Install rust target
-        run: rustup target add ${{ matrix.target }}
-
       - name: Install dependencies (ubuntu only)
-        if: matrix.platform == 'ubuntu-22.04'
+        if: startsWith(matrix.platform, 'ubuntu-22.04')
         run: |
           sudo apt-get update
-          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf xdg-utils
 
-      - name: Install Rust stable
-        uses: dtolnay/rust-toolchain@stable
+      - name: Add Rust build target
+        working-directory: src-tauri
+        shell: bash
+        run: |
+          rustup target add ${{ matrix.target }} || true
+
+      - name: Add pizza engine as a dependency
+        working-directory: src-tauri
+        shell: bash
+        run: |
+          BUILD_ARGS="--target ${{ matrix.target }}"
+          if [[ "${{matrix.target }}" != "i686-pc-windows-msvc" ]]; then
+            echo "Adding pizza engine as a dependency for ${{matrix.platform }}-${{matrix.target }}"
+            ( cargo add --path ../pizza/lib/engine --features query_string_parser,persistence )
+            BUILD_ARGS+=" --features use_pizza_engine"
+          else
+            echo "Skipping pizza engine dependency for ${{matrix.platform }}-${{matrix.target }}"
+          fi
+          echo "BUILD_ARGS=${BUILD_ARGS}" >> $GITHUB_ENV
 
       - name: Rust cache
         uses: swatinem/rust-cache@v2
@@ -88,8 +139,8 @@ jobs:
 
       - name: Install app dependencies and build web
         run: pnpm install --frozen-lockfile
-
-      - name: Build the app
+      
+      - name: Build the coco at ${{ matrix.platform}} for ${{ matrix.target }} @ ${{ env.APP_VERSION }}
         uses: tauri-apps/tauri-action@v0
         env:
           CI: false
@@ -105,8 +156,8 @@ jobs:
           APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}
         with:
           tagName: ${{ github.ref_name }}
-          releaseName: Coco ${{ needs.create-release.outputs.APP_VERSION }}
-          releaseBody: ""
+          releaseName: Coco ${{ env.APP_VERSION }}
+          releaseBody: "${{ needs.create-release.outputs.RELEASE_BODY }}"
           releaseDraft: true
           prerelease: false
-          args: --target ${{ matrix.target }}
+          args: ${{ env.BUILD_ARGS }}

.github/workflows/rust_code_check.yml

@@ -0,0 +1,61 @@
+name: Rust Code Check
+
+on:
+  pull_request:
+    # Only run it when Rust code changes
+    paths:
+      - 'src-tauri/**'
+
+jobs:
+  check:
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, windows-latest, macos-latest]
+    
+    runs-on: ${{ matrix.platform }}
+    
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Checkout dependency (pizza-engine) repository
+      uses: actions/checkout@v4
+      with:
+        repository: 'infinilabs/pizza'
+        ssh-key: ${{ secrets.SSH_PRIVATE_KEY }}
+        submodules: recursive
+        ref: main
+        path: pizza
+
+    - name: Install dependencies (ubuntu only)
+      if: startsWith(matrix.platform, 'ubuntu-latest')
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf xdg-utils
+
+    - name: Add pizza engine as a dependency
+      working-directory: src-tauri
+      shell: bash
+      run: cargo add --path ../pizza/lib/engine --features query_string_parser,persistence
+
+    - name: Format check
+      working-directory: src-tauri
+      shell: bash
+      run: |
+        rustup component add rustfmt
+        cargo fmt --all --check
+
+    - name: Check compilation (Without Pizza engine enabled)
+      working-directory: ./src-tauri
+      run: cargo check 
+
+    - name: Check compilation (With Pizza engine enabled)
+      working-directory: ./src-tauri
+      run: cargo check --features use_pizza_engine
+    
+    - name: Run tests (Without Pizza engine)
+      working-directory: ./src-tauri
+      run: cargo test
+
+    - name: Run tests (With Pizza engine)
+      working-directory: ./src-tauri
+      run: cargo test --features use_pizza_engine

.gitignore

@@ -11,6 +11,8 @@ node_modules
 dist
 dist-ssr
 *.local
+out
+src/components/web
 
 # Editor directories and files
 # .vscode/*
@@ -23,3 +25,4 @@ dist-ssr
 *.njsproj
 *.sln
 *.sw?
+.env

.vscode/settings.json

@@ -4,34 +4,55 @@
     "autolaunch",
     "Avenir",
     "callout",
+    "changelogithub",
     "clsx",
     "codegen",
+    "dataurl",
+    "deeplink",
+    "deepthink",
+    "dtolnay",
     "dyld",
+    "elif",
+    "errmsg",
     "fullscreen",
+    "fulltext",
     "headlessui",
     "Icdbb",
     "icns",
+    "iconfont",
     "INFINI",
+    "infinilabs",
     "inputbox",
     "katex",
     "khtml",
     "languagedetector",
+    "libappindicator",
+    "librsvg",
+    "libwebkit",
     "localstorage",
     "lucide",
     "maximizable",
+    "mdast",
+    "meval",
     "Minimizable",
+    "msvc",
     "nord",
     "nowrap",
     "nspanel",
     "nsstring",
     "overscan",
     "partialize",
+    "patchelf",
+    "Quicklink",
     "Raycast",
     "rehype",
     "reqwest",
+    "rerank",
     "rgba",
+    "rustup",
     "screenshotable",
     "serde",
+    "swatinem",
     "tailwindcss",
     "tauri",
     "thiserror",
@@ -41,11 +62,14 @@
     "traptitech",
     "unlisten",
     "unlistener",
+    "unlisteners",
     "unminimize",
     "uuidv",
     "VITE",
     "walkdir",
+    "wavesurfer",
     "webviews",
+    "xzvf",
     "yuque",
     "zustand"
   ],
@@ -59,5 +83,6 @@
   "i18n-ally.keystyle": "nested",
   "editor.tabSize": 2,
   "editor.insertSpaces": true,
-  "editor.detectIndentation": false
+  "editor.detectIndentation": false,
+  "i18n-ally.displayLanguage": "zh"
 }

Makefile

@@ -76,3 +76,10 @@ clean-rebuild:
 	@echo "Cleaning up and rebuilding..."
 	rm -rf node_modules
 	$(MAKE) dev-build
+
+add-dep-pizza-engine:
+	cd src-tauri && cargo add --git ssh://git@github.com/infinilabs/pizza.git pizza-engine --features query_string_parser,persistence
+
+dev-build-with-pizza: add-dep-pizza-engine
+	@echo "Starting desktop development with Pizza Engine pulled in..."
+	RUST_BACKTRACE=1 pnpm tauri dev --features use_pizza_engine

README.md

@@ -1,7 +1,15 @@
 # Coco AI - Connect & Collaborate
 
+<div align="center">
+
 **Tagline**: _"Coco AI - search, connect, collaborate – all in one place."_
 
+Visit our website: [https://coco.rs](https://coco.rs)
+
+[![License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE) [![Tauri 2.0](https://img.shields.io/badge/Tauri-2.0-blue)](https://tauri.app/) [![React](https://img.shields.io/badge/React-18-blue)](https://react.dev/) [![TypeScript](https://img.shields.io/badge/TypeScript-5-blue)](https://www.typescriptlang.org/) [![Rust](https://img.shields.io/badge/Rust-latest-orange)](https://www.rust-lang.org/) [![Node](https://img.shields.io/badge/Node-%3E%3D18.12-green)](https://nodejs.org/) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/infinilabs/coco-app/pulls) [![Version](https://img.shields.io/github/v/release/infinilabs/coco-app)](https://github.com/infinilabs/coco-app/releases) [![Build Status](https://img.shields.io/github/actions/workflow/status/infinilabs/coco-app/ci.yml)](https://github.com/infinilabs/coco-app/actions) [![Discord](https://img.shields.io/discord/1122384609359966313)](https://discord.com/invite/4tKTMkkvVX)
+
+</div>
+
 Coco AI is a unified search platform that connects all your enterprise applications and data—Google Workspace, Dropbox,
 Confluent Wiki, GitHub, and more—into a single, powerful search interface. This repository contains the **Coco App**,
 built for both **desktop and mobile**. The app allows users to search and interact with their enterprise data across
@@ -12,16 +20,15 @@ and internal resources. Coco enhances collaboration by making information instan
 insights based on your enterprise's specific data.
 
 > **Note**: Backend services, including data indexing and search functionality, are handled in a
-> separate [repository](https://github.com/infinilabs/coco-server).
+separate [repository](https://github.com/infinilabs/coco-server).
 
-## Vision
+![Coco AI](./docs/static/img/coco-preview.gif)
 
-At Coco AI, we aim to streamline workplace collaboration by centralizing access to enterprise data. The Coco
-App
-provides a seamless, cross-platform experience, enabling teams to easily search, connect, and collaborate within their
-workspace.
+## 🚀 Vision
 
-## Use Cases
+At Coco AI, we aim to streamline workplace collaboration by centralizing access to enterprise data. The Coco App provides a seamless, cross-platform experience, enabling teams to easily search, connect, and collaborate within their workspace.
+
+## 💡 Use Cases
 
 - **Unified Search Across Platforms**: Coco integrates with all your enterprise apps, letting you search documents,
   conversations, and files across Google Workspace, Dropbox, GitHub, etc.
@@ -32,37 +39,75 @@ workspace.
 - **Simplified Data Access**: By removing the friction between various tools, Coco enhances your workflow and increases
   productivity.
 
-## Getting Started
+## ✨ Key Features
 
-### Initial Setup
+- 🔍 **Unified Search**: One-stop enterprise search with multi-platform integration
+  - Supports major collaboration platforms: Google Workspace, Dropbox, Confluence Wiki, GitHub, etc.
+  - Real-time search across documents, conversations, and files
+  - Smart search intent understanding with relevance ranking
+  - Cross-platform data correlation and context display
+- 🤖 **AI-Powered Chat**: Team-specific ChatGPT-like assistant trained on your enterprise data
+- 🌐 **Cross-Platform**: Available for Windows, macOS, Linux and Web
+- 🔒 **Security-First**: Support for private deployment and data sovereignty
+- ⚡ **High Performance**: Built with Rust and Tauri 2.0
+- 🎨 **Modern UI**: Sleek interface designed for productivity
 
-**This version of pnpm requires at least Node.js v18.12**
+## 🛠️ Technology Stack
 
-To set up the Coco App for development:
+- **Frontend**: React + TypeScript
+- **Desktop Framework**: Tauri 2.0
+- **Styling**: Tailwind CSS
+- **State Management**: Zustand
+- **Build Tool**: Vite
+
+## 🚀 Getting Started
+
+### Prerequisites
+
+- Node.js >= 18.12
+- Rust (latest stable)
+- pnpm (package manager)
+
+### Development Setup
 
 ```bash
-cd coco-app
+# Install pnpm
 npm install -g pnpm
+
+# Install dependencies
 pnpm install
+
+# Start development server
 pnpm tauri dev
 ```
 
-#### Desktop Development:
-
-To start desktop development, run:
+### Production Build
 
 ```bash
-pnpm tauri dev
+pnpm tauri build
 ```
 
-## Documentation
+## 📚 Documentation
 
-For full documentation on Coco AI, please visit the [Coco AI Documentation](https://docs.infinilabs.com/coco-app/main/).
+- [Coco App Documentation](https://docs.infinilabs.com/coco-app/main/)
+- [Coco Server Documentation](https://docs.infinilabs.com/coco-server/main/)
+- [DeepWiki Coco App](https://deepwiki.com/infinilabs/coco-app)
+- [DeepWiki Coco Server](https://deepwiki.com/infinilabs/coco-server)
+- [Tauri Documentation](https://tauri.app/)
 
-## License
+## Contributors
 
-Coco AI is an open-source project licensed under
-the [MIT License](https://github.com/infinilabs/coco-app/blob/main/LICENSE).
+<a href="https://github.com/infinilabs/coco-app/graphs/contributors">
+  <img src="https://contrib.rocks/image?repo=infinilabs/coco-app" />
+</a>
 
-This means that you can freely use, modify, and
-distribute the software for both personal and commercial purposes, including hosting it on your own servers.
+## 📄 License
+
+Coco AI is an open-source project licensed under the [MIT License](LICENSE). You can freely use, modify, and
+distribute the software for both personal and commercial purposes, including hosting it on your own servers.
+
+---
+
+<div align="center">
+Built with ❤️ by <a href="https://infinilabs.com">INFINI Labs</a>
+</div>

docs/config.yaml

@@ -7,6 +7,12 @@ theme: book
 disablePathToLower: true
 enableGitInfo: false
 
+outputs:
+  home:
+    - HTML
+    - RSS
+    - JSON
+
 # Needed for mermaid/katex shortcodes
 markup:
   goldmark:

docs/content.en/_index.md

@@ -7,8 +7,7 @@ type: docs
 
 Coco AI is a fully open-source, cross-platform unified search and productivity tool that connects and searches across various data sources, including applications, files, Google Drive, Notion, Yuque, Hugo, and more, both local and cloud-based. By integrating with large models like DeepSeek, Coco AI enables intelligent personal knowledge management, emphasizing privacy and supporting private deployment, helping users quickly and intelligently access their information.
 
-{{% load-img "/img/screenshot/fusion-search-across-datasources.png" "" %}}
-{{% load-img "/img/screenshot/coco-chat.png" "" %}}
+{{% load-img "/img/coco-preview.gif" "" %}}
 
 For more details on Coco Server, visit: [https://docs.infinilabs.com/coco-app/](https://docs.infinilabs.com/coco-app/).
 

docs/content.en/docs/_index.md

@@ -7,8 +7,7 @@ type: docs
 
 Coco AI is a fully open-source, cross-platform unified search and productivity tool that connects and searches across various data sources, including applications, files, Google Drive, Notion, Yuque, Hugo, and more, both local and cloud-based. By integrating with large models like DeepSeek, Coco AI enables intelligent personal knowledge management, emphasizing privacy and supporting private deployment, helping users quickly and intelligently access their information.
 
-{{% load-img "/img/screenshot/fusion-search-across-datasources.png" "" %}}
-{{% load-img "/img/screenshot/coco-chat.png" "" %}}
+{{% load-img "/img/coco-preview.gif" "" %}}
 
 For more details on Coco Server, visit: [https://docs.infinilabs.com/coco-app/](https://docs.infinilabs.com/coco-app/).
 

docs/content.en/docs/getting-started/installation/macos.md

@@ -1,21 +1,35 @@
 ---
 weight: 10
-title: "Mac OS"
+title: "macOS"
 asciinema: true
 ---
 
-# Mac OS
+# macOS
 
 ## Download Coco AI
 
-Goto [https://coco.rs/](https://coco.rs/)
+Go to [coco.rs](https://coco.rs/) and download the package of your architecture:
 
-{{% load-img "/img/download-mac-app.png" "" %}}
+{{% load-img "/img/macos/mac-download-app.png" "" %}}
+
+It should be placed in your "Downloads" folder:
+
+{{% load-img "/img/macos/mac-zip-file.png" "" %}}
 
 ## Unzip DMG file
 
-{{% load-img "/img/unzip-dmg-file.png" "" %}}
+Unzip the file:
+
+{{% load-img "/img/macos/mac-unzip-zip-file.png" "" %}}
+
+You will get a `dmg` file:
+
+{{% load-img "/img/macos/mac-dmg.png" "" %}}
 
 ## Drag to Application Folder
 
-{{% load-img "/img/drag-to-application-folder.png" "" %}}
+Double click the `dmg` file, a window will pop up. Then drag the "Coco-AI" app to 
+your "Applications" folder:
+
+{{% load-img "/img/macos/drag-to-app-folder.png" "" %}}
+

docs/content.en/docs/getting-started/installation/ubuntu.md

@@ -0,0 +1,40 @@
+---
+weight: 10
+title: "Ubuntu"
+asciinema: true
+---
+
+# Ubuntu
+
+> NOTE: Coco app only works fully under [X11][x11_protocol].
+>
+> Don't know if you running X11 or not? take a look at this [question][if_x11]!
+
+[x11_protocol]: https://en.wikipedia.org/wiki/X_Window_System 
+[if_x11]: https://unix.stackexchange.com/q/202891/498440
+
+
+## Go to the download page
+
+Download page: [link](https://coco.rs/#install)
+
+## Download the package
+
+Download the package of your architecture, it should be put in your `Downloads` directory 
+and look like this:
+
+```sh
+$ cd ~/Downloads
+$ ls 
+Coco-AI-x.y.z-bbbb-deb-linux-amd64.zip 
+# or Coco-AI-x.y.z-bbbb-deb-linux-arm64.zip depending on your architecture
+```
+
+## Install it
+   
+Unzip and install it
+
+```
+$ unzip Coco-AI-x.y.z-bbbb-deb-linux-amd64.zip 
+$ sudo dpkg -i Coco-AI-x.y.z-bbbb-deb-linux-amd64.deb 
+```

docs/content.en/docs/release-notes/_index.md

@@ -5,18 +5,345 @@ title: "Release Notes"
 
 # Release Notes
 
-Information about release notes of Coco Server is provided here.
+Information about release notes of Coco App is provided here.
 
 ## Latest (In development)
 
+### ❌ Breaking changes
+
+### 🚀 Features
+
+- feat: enhance ui for skipped version #834
+- feat: support installing local extensions #749
+- feat: support sending files in chat messages #764
+- feat: sub extension can set 'platforms' now #847
+- feat: add extension uninstall option in settings #855
+- feat: impl extension settings 'hide_before_open' #862
+- feat: index both en/zh_CN app names and show app name in chosen language #875
+
+### 🐛 Bug fix
+
+- fix: fix issue with update check failure #833
+- fix: web component login state #857
+
+### ✈️ Improvements
+
+- refactor: calling service related interfaces #831
+- refactor: split query_coco_fusion() #836
+- chore: web component loading font icon #838
+- chore: delete unused code files and dependencies #841
+- chore: ignore tauri::AppHandle's generic argument R #845
+- refactor: check Extension/plugin.json from all sources #846
+- refactor: pinning window won't set CanJoinAllSpaces on macOS #854
+- build: web component build error #858
+- refactor: coordinate third-party extension operations using lock #867
+- refactor: index iOS apps and macOS apps that store icon in Assets.car #872
+- refactor: accept both '-' and '_' as locale str separator #876
+
+## 0.7.1 (2025-07-27)
+
+### ❌ Breaking changes
+
+### 🚀 Features
+
+### 🐛 Bug fix
+
+- fix: correct enter key behavior #828
+
+### ✈️ Improvements
+
+- chore: web component add notification component #825
+- refactor: collection behavior defaults to `MoveToActiveSpace`, and only use `CanJoinAllSpaces` when window is pinned #829
+
+## 0.7.0 (2025-07-25)
+
+### ❌ Breaking changes
+
+### 🚀 Features
+
+- feat: file search using spotlight #705
+- feat: voice input support in both search and chat modes #732
+- feat: text to speech now powered by LLM #750
+- feat: file search for Windows #762
+
+### 🐛 Bug fix
+
+- fix(file search): apply filters before from/size parameters #741
+- fix(file search): searching by name&content does not search file name #743
+- fix: prevent window from hiding when moved on Windows #748
+- fix: unregister ext hotkey when it gets deleted #770
+- fix: indexing apps does not respect search scope config #773
+- fix: restore missing category titles on subpages #772
+- fix: correct incorrect assistant display when quick ai access #779
+- fix: resolved minor issues with voice playback #780
+- fix: fixed incorrect taskbar icon display on linux #783
+- fix: fix data inconsistency issue on secondary pages #784
+- fix: incorrect status when installing extension #789
+- fix: increase read_timeout for HTTP streaming stability #798
+- fix: enter key problem #794
+- fix: fix selection issue after renaming #800
+- fix: fix shortcut issue in windows context menu #804
+- fix: panic caused by "state() called before manage()" #806
+- fix: fix multiline input issue #808
+- fix: fix ctrl+k not working #815
+- fix: fix update window config sync #818
+- fix: fix enter key on subpages #819
+- fix: panic on Ubuntu (GNOME) when opening apps #821
+
+### ✈️ Improvements
+
+- refactor: prioritize stat(2) when checking if a file is dir #737
+- refactor: change File Search ext type to extension #738
+- refactor: create chat & send chat api #739
+- chore: icon support for more file types #740
+- chore: replace meval-rs with our fork to clear dep warning #745
+- refactor: adjusted assistant, datasource, mcp_server interface parameters #746
+- refactor: adjust extension code hierarchy #747
+- chore: bump dep applications-rs #751
+- chore: rename QuickLink/quick_link to Quicklink/quicklink #752
+- chore: assistant params & styles #753
+- chore: make optional fields optional #758
+- chore: search-chat components add formatUrl & think data & icons url #765
+- chore: Coco app http request headers #744
+- refactor: do status code check before deserializing response #767
+- style: splash adapts to the width of mobile phones #768
+- chore: search-chat add language and formatUrl parameters #775
+- chore: not request the interface if not logged in #795
+- refactor: clean up unsupported characters from query string in Win Search #802
+- chore: display backtrace in panic log #805
+
+## 0.6.0 (2025-06-29)
+
+### ❌ Breaking changes
+
+### 🚀 Features
+
+- feat: support `Tab` and `Enter` for delete dialog buttons #700
+- feat: add check for updates #701
+- feat: impl extension store #699
+- feat: support back navigation via delete key #717
+
+### 🐛 Bug fix
+
+- fix: quick ai state synchronous #693
+- fix: toggle extension should register/unregister hotkey #691
+- fix: take coco server back on refresh #696
+- fix: some input fields couldn’t accept spaces #709
+- fix: context menu search not working #713
+- fix: open extension store display #724
+
+### ✈️ Improvements
+
+- refactor: use author/ext_id as extension unique identifier #643
+- refactor: refactoring search api #679
+- chore: continue to chat page display #690
+- chore: improve server list selection with enter key #692
+- chore: add message for latest version check #703
+- chore: log command execution results #718
+- chore: adjust styles and add button reindex #719
+
+## 0.5.0 (2025-06-13)
+
+### ❌ Breaking changes
+
+### 🚀 Features
+
+- feat: check or enter to close the list of assistants #469
+- feat: add dimness settings for pinned window #470
+- feat: supports Shift + Enter input box line feeds #472
+- feat: support for snapshot version updates #480
+- feat: history list add put away button #482
+- feat: the chat input box supports multi-line input #490
+- feat: add `~/Applications` to the search path #493
+- feat: the chat content has added a button to return to the bottom #495
+- feat: the search input box supports multi-line input #501
+- feat: websocket support self-signed TLS #504
+- feat: add option to allow self-signed certificates #509
+- feat: add AI summary component #518
+- feat: dynamic log level via env var COCO_LOG #535
+- feat: add quick AI access to search mode #556
+- feat: rerank search results #561
+- feat: ai overview support is enabled with shortcut #597
+- feat: add key monitoring during reset #615
+- feat: calculator extension add description #623
+- feat: support right-click actions after text selection #624
+- feat: add ai overview minimum number of search results configuration #625
+- feat: add internationalized translations of AI-related extensions #632
+- feat: context menu support for secondary pages #680
+
+### 🐛 Bug fix
+
+- fix: solve the problem of modifying the assistant in the chat #476
+- fix: several issues around search #502
+- fix: fixed the newly created session has no title when it is deleted #511
+- fix: loading chat history for potential empty attachments
+- fix: datasource & MCP list synchronization update #521
+- fix: app icon & category icon #529
+- fix: show only enabled datasource & MCP list
+- fix: server image loading failure #534
+- fix: panic when fetching app metadata on Windows #538
+- fix: service switching error #539
+- fix: switch server assistant and session unchanged #540
+- fix: history list height #550
+- fix: secondary page cannot be searched #551
+- fix: the scroll button is not displayed by default #552
+- fix: suggestion list position #553
+- fix: independent chat window has no data #554
+- fix: resolved navigation error on continue chat action #558
+- fix: make extension search source respect parameter datasource #576
+- fix: fixed issue with incorrect login status #600
+- fix: new chat assistant id not found #603
+- fix: resolve regex error on older macOS versions #605
+- fix: fix chat log update and sorting issues #612
+- fix: resolved an issue where number keys were not working on the web #616
+- fix: do not panic when the datasource specified does not exist #618
+- fix: fixed modifier keys not working with continue chat #619
+- fix: invalid DSL error if input contains multiple lines #620
+- fix: fix ai overview hidden height before message #622
+- fix: tab key hides window in chat mode #641
+- fix: arrow keys still navigated search when menu opened with Cmd+K #642
+- fix: input lost when reopening dialog after search #644
+- fix: web page unmount event #645
+- fix: fix the problem of local path not opening #650
+- fix: number keys not following settings #661
+- fix: fix problem with up and down key indexing #676
+- fix: arrow inserting escape sequences #683
+
+### ✈️ Improvements
+
+- chore: adjust list error message #475
+- chore: refine wording on search failure
+- chore：search and MCP show hidden logic #494
+- chore: greetings show hidden logic #496
+- refactor: fetch app list in settings in real time #498
+- chore: UpdateApp component loading location #499
+- chore: add clear monitoring & cache calculation to optimize performance #500
+- refactor: optimizing the code #505
+- refactor: optimized the modification operation of the numeric input box #508
+- style: modify the style of the search input box #513
+- style: chat input icons show #515
+- refactor: refactoring icon component #514
+- refactor: optimizing list styles in markdown content #520
+- feat: add a component for text reading aloud #522
+- style: history component styles #528
+- style: search error styles #533
+- chore: skip register server that not logged in #536
+- refactor: service info related components #537
+- chore: chat content can be copied #539
+- refactor: refactoring search error #541
+- chore: add assistant count #542
+- chore: add global login judgment #544
+- chore: mark server offline on user logout #546
+- chore: logout update server profile #549
+- chore: assistant keyboard events and mouse events #559
+- chore: web component start page config #560
+- chore: assistant chat placeholder & refactor input box components #566
+- refactor: input box related components #568
+- chore: mark unavailable server to offline on refresh info #569
+- chore: only show available servers in chat #570
+- refactor: search result related components #571
+- chore: initialize current assistant from history #606
+- chore: add onContextMenu event #629
+- chore: more logs for the setup process #634
+- chore: copy supports http protocol #639
+- refactor: use author/ext_id as extension unique identifier #643
+- chore: add special character filtering #668
+
+## 0.4.0 (2025-04-27)
+
+### Breaking changes
+
 ### Features
 
+- feat: history support for searching, renaming and deleting #322
+- feat: linux support for application search #330
+- feat: add shortcuts to most icon buttons #334
+- feat: add font icon for search list #342
+- feat: add a border to the main window in Windows 10 #343
+- feat: mobile terminal adaptation about style #348
+- feat: service list popup box supports keyboard-only operation #359
+- feat: networked search data sources support search and keyboard-only operation #367
+- feat: add application management to the plugin #374
+- feat: add keyboard-only operation to history list #385
+- feat: add error notification #386
+- feat: add support for AI assistant #394
+- feat: add support for calculator function #399
+- feat: auto selects the first item after searching #411
+- feat: web components assistant #422
+- feat: right-click menu support for search #423
+- feat: add chat mode launch page #424
+- feat: add MCP & call LLM tools #430
+- feat: ai assistant supports search and paging #431
+- feat: data sources support displaying customized icons #432
+- feat: add shortcut key conflict hint and reset function #442
+- feat: updated to include error message #465
+- feat: support third party extensions #572
+- feat: support ai overview #572
+
+### Bug fix
+
+- fix: fixed the problem of not being able to search in secondary directories #338
+- fix: active shadow setting #354
+- fix: chat history was not show up #377
+- fix: get attachments in chat sessions
+- fix: filter http query_args and convert only supported values
+- fix：fixed several search & chat bugs #412
+- fix: fixed carriage return problem with chinese input method #464
+
+### Improvements
+
+- refactor: web components #331
+- refactor: refactoring login callback, receive access_token from coco-server
+- chore: adjust web component styles #362
+- style: modify the style #370
+- style: search list details display #378
+- refactor: refactoring api error handling #382
+- chore: update assistant icon & think mode #397
+- build: build web components and publish #404
+
+## 0.3.0 (2025-03-31)
+
+### Breaking changes
+
+### Features
+
+- feat: add web pages components #277
+- feat: support for customizing some of the preset shortcuts #316
+- feat: support multi websocket connections #314
+- feat: add support for embeddable web widget #277
+
+### Bug fix
+
+### Improvements
+
+- refactor: refactor invoke related code #309
+- refactor: hide apps without icon #312
+
+## 0.2.1 (2025-03-14)
+
+### Features
+
+- support for automatic in-app updates #274
+
 ### Breaking changes
 
 ### Bug fix
 
+- Fix the issue that the fusion search include disabled servers
+- Fix incorrect version type: should be string instead of u32
+- Fix the chat end judgment type #280
+- Fix the chat scrolling and chat rendering #282
+- Fix: store data is not shared among multiple windows #298
+
 ### Improvements
 
+- Refactor: chat components #273
+- Feat: add endpoint display #282
+- Chore: chat window min width & remove input bg #284
+- Chore: remove selected function & add hide_coco #286
+- Chore: websocket timeout increased to 2 minutes #289
+- Chore: remove chat input border & clear input #295
+
 ## 0.2.0 (2025-03-07)
 
 ### Features
@@ -25,7 +352,7 @@ Information about release notes of Coco Server is provided here.
 - Add api to disable or enable server #185
 - Networked search supports selection of data sources #209
 - Add deepthink and knowledge search options to RAG based chat
-- Support i18n, add Chinese language support 
+- Support i18n, add Chinese language support
 - Support Windows platform
 - etc.
 
@@ -54,7 +381,6 @@ Information about release notes of Coco Server is provided here.
 - Allow to switch servers in the settings page
 - etc.
 
-
 ## 0.1.0 (2025-02-16)
 
 ### Features

index.html

@@ -7,7 +7,7 @@
     <title>Coco</title>
   </head>
 
-  <body>
+  <body class="coco-container">
     <div id="root"></div>
     <script type="module" src="/src/main.tsx"></script>
   </body>

package.json

@@ -1,11 +1,16 @@
 {
   "name": "coco",
   "private": true,
-  "version": "0.2.0",
+  "version": "0.7.1",
   "type": "module",
   "scripts": {
     "dev": "vite",
     "build": "tsc && vite build",
+    "build:web": "cross-env BUILD_TARGET=web tsc && cross-env BUILD_TARGET=web tsup --format esm",
+    "publish:web": "cd out/search-chat && npm publish",
+    "publish:web:beta": "cd dist/search-chat && npm publish --tag beta",
+    "publish:web:alpha": "cd dist/search-chat && npm publish --tag alpha",
+    "publish:web:rc": "cd dist/search-chat && npm publish --tag rc",
     "preview": "vite preview",
     "tauri": "tauri",
     "release": "release-it",
@@ -13,33 +18,38 @@
     "release-beta": "release-it --preRelease=beta --preReleaseBase=1"
   },
   "dependencies": {
-    "@headlessui/react": "^2.2.0",
-    "@tauri-apps/api": "^2.3.0",
+    "@headlessui/react": "^2.2.2",
+    "@tauri-apps/api": "^2.5.0",
     "@tauri-apps/plugin-autostart": "~2.2.0",
-    "@tauri-apps/plugin-deep-link": "^2.2.0",
-    "@tauri-apps/plugin-dialog": "^2.2.0",
+    "@tauri-apps/plugin-deep-link": "^2.2.1",
+    "@tauri-apps/plugin-dialog": "^2.2.1",
     "@tauri-apps/plugin-global-shortcut": "~2.0.0",
     "@tauri-apps/plugin-http": "~2.0.2",
-    "@tauri-apps/plugin-os": "^2.2.0",
-    "@tauri-apps/plugin-process": "^2.2.0",
-    "@tauri-apps/plugin-shell": "^2.2.0",
-    "@tauri-apps/plugin-updater": "^2.5.1",
-    "@tauri-apps/plugin-websocket": "~2.3.0",
+    "@tauri-apps/plugin-log": "~2.4.0",
+    "@tauri-apps/plugin-opener": "^2.2.7",
+    "@tauri-apps/plugin-os": "^2.2.1",
+    "@tauri-apps/plugin-process": "^2.2.1",
+    "@tauri-apps/plugin-shell": "^2.2.1",
+    "@tauri-apps/plugin-updater": "github:infinilabs/tauri-plugin-updater#v2",
     "@tauri-apps/plugin-window": "2.0.0-alpha.1",
+    "@wavesurfer/react": "^1.0.11",
     "ahooks": "^3.8.4",
+    "axios": "^1.9.0",
     "clsx": "^2.1.1",
-    "dotenv": "^16.4.7",
+    "dayjs": "^1.11.13",
+    "dotenv": "^16.5.0",
     "filesize": "^10.1.6",
     "i18next": "^23.16.8",
-    "i18next-browser-languagedetector": "^8.0.4",
+    "i18next-browser-languagedetector": "^8.1.0",
     "lodash-es": "^4.17.21",
     "lucide-react": "^0.461.0",
-    "mermaid": "^11.4.1",
-    "nanoid": "^5.1.2",
+    "mdast-util-gfm-autolink-literal": "2.0.0",
+    "mermaid": "^11.6.0",
+    "nanoid": "^5.1.5",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
-    "react-hotkeys-hook": "^4.6.1",
-    "react-i18next": "^15.4.1",
+    "react-hotkeys-hook": "^4.6.2",
+    "react-i18next": "^15.5.1",
     "react-markdown": "^9.1.0",
     "react-router-dom": "^6.30.0",
     "react-window": "^1.8.11",
@@ -48,31 +58,39 @@
     "remark-breaks": "^4.0.0",
     "remark-gfm": "^4.0.1",
     "remark-math": "^6.0.0",
-    "tauri-plugin-fs-pro-api": "^2.3.1",
-    "tauri-plugin-macos-permissions-api": "^2.1.1",
-    "tauri-plugin-screenshots-api": "^2.1.0",
+    "tailwind-merge": "^3.3.1",
+    "tauri-plugin-fs-pro-api": "^2.4.0",
+    "tauri-plugin-macos-permissions-api": "^2.3.0",
+    "tauri-plugin-screenshots-api": "^2.2.0",
+    "tauri-plugin-windows-version-api": "^2.0.0",
+    "type-fest": "^4.41.0",
     "use-debounce": "^10.0.4",
     "uuid": "^11.1.0",
-    "zustand": "^5.0.3"
+    "wavesurfer.js": "^7.9.5",
+    "zustand": "^5.0.4"
   },
   "devDependencies": {
-    "@tauri-apps/cli": "^2.3.1",
+    "@tauri-apps/cli": "^2.5.0",
+    "@types/dom-speech-recognition": "^0.0.4",
     "@types/lodash-es": "^4.17.12",
     "@types/markdown-it": "^14.1.2",
-    "@types/node": "^22.13.9",
-    "@types/react": "^18.3.18",
-    "@types/react-dom": "^18.3.5",
-    "@types/react-i18next": "^8.1.0",
+    "@types/node": "^22.15.17",
+    "@types/react": "^18.3.21",
+    "@types/react-dom": "^18.3.7",
     "@types/react-katex": "^3.0.4",
     "@types/react-window": "^1.8.8",
-    "@vitejs/plugin-react": "^4.3.4",
-    "autoprefixer": "^10.4.20",
+    "@vitejs/plugin-react": "^4.4.1",
+    "autoprefixer": "^10.4.21",
+    "cross-env": "^7.0.3",
     "immer": "^10.1.1",
     "postcss": "^8.5.3",
     "release-it": "^18.1.2",
+    "sass": "^1.87.0",
     "tailwindcss": "^3.4.17",
-    "tsx": "^4.19.3",
-    "typescript": "^5.8.2",
-    "vite": "^5.4.14"
-  }
-}
+    "tsup": "^8.4.0",
+    "tsx": "^4.19.4",
+    "typescript": "^5.8.3",
+    "vite": "^5.4.19"
+  },
+  "packageManager": "pnpm@10.11.0+sha512.6540583f41cc5f628eb3d9773ecee802f4f9ef9923cc45b69890fb47991d4b092964694ec3a4f738a420c918a333062c8b925d312f42e4f0c263eb603551f977"
+}

scripts/devWeb.ts

@@ -0,0 +1 @@
+(() => {})();

src-tauri/Cargo.toml

@@ -1,9 +1,9 @@
 [package]
 name = "coco"
-version = "0.2.0"
+version = "0.7.1"
 description = "Search, connect, collaborate – all in one place."
 authors = ["INFINI Labs"]
-edition = "2021"
+edition = "2024"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [lib]
@@ -20,34 +20,53 @@ tauri-build = { version = "2", features = ["default"] }
 default = ["desktop"]
 desktop = []
 cargo-clippy = []
+# If enabled, code that relies on pizza_engine will be activated.
+#
+# Only do this if:
+# 1. Pizza engine is listed in the `dependencies` section
+#  
+# ```toml
+# [dependencies]
+# pizza-engine = { git = "ssh://git@github.com/infinilabs/pizza.git", features = ["query_string_parser", "persistence"] }
+# ```
+#
+# 2. It is a private repo, you have access to it.
+#
+# So, for external contributors, do NOT enable this feature.
+# 
+# Previously, We listed it in the dependencies and marked it optional, but cargo 
+# would fetch all the dependencies regardless of wheterh they are optional or not, 
+# so we removed it.
+#
+# https://github.com/rust-lang/cargo/issues/4544#issuecomment-1906902755
+use_pizza_engine = []
 
 [dependencies]
 pizza-common = { git = "https://github.com/infinilabs/pizza-common", branch = "main" }
 
-tauri = { version = "2", features = ["protocol-asset", "macos-private-api", "tray-icon", "image-ico", "image-png", "unstable"] }
+tauri = { version = "2", features = ["protocol-asset", "macos-private-api", "tray-icon", "image-ico", "image-png"] }
 tauri-plugin-shell = "2"
 serde = { version = "1", features = ["derive"] }
-serde_json = "1"
+# Need `arbitrary_precision` feature to support storing u128
+# see: https://docs.rs/serde_json/latest/serde_json/struct.Number.html#method.from_u128
+serde_json = { version = "1", features = ["arbitrary_precision", "preserve_order"] }
 tauri-plugin-http = "2"
-tauri-plugin-websocket = "2"
 tauri-plugin-deep-link = "2.0.0"
 tauri-plugin-store = "2.2.0"
 tauri-plugin-os = "2"
 tauri-plugin-dialog = "2"
 tauri-plugin-fs = "2"
-tauri-plugin-updater = "2"
 tauri-plugin-process = "2"
 tauri-plugin-drag = "2"
 tauri-plugin-macos-permissions = "2"
 tauri-plugin-fs-pro = "2"
 tauri-plugin-screenshots = "2"
-applications = "0.3.0"
-
+applications = { git = "https://github.com/infinilabs/applications-rs", rev = "2f1f88d1880404c5f8d70ad950b859bd49922bee" }
 tokio-native-tls = "0.3"  # For wss connections
 tokio = { version = "1", features = ["full"] }
-tokio-tungstenite = { version = "0.20", features = ["rustls-tls-webpki-roots"] }
+tokio-tungstenite = { version = "0.20", features = ["native-tls"] }
 hyper = { version = "0.14", features = ["client"] }
-reqwest = "0.12.12"
+reqwest = { version = "0.12", features = ["json", "multipart"] }
 futures = "0.3.31"
 ordered-float = { version = "4.6.0", default-features = false }
 lazy_static = "1.5.0"
@@ -60,14 +79,35 @@ hostname = "0.3"
 plist = "1.7"
 base64 = "0.13"
 walkdir = "2"
-fuzzy_prefix_search = "0.2"
 log = "0.4"
-
+strsim = "0.10"
 futures-util = "0.3.31"
-url = "2.5.2"
 http = "1.1.0"
 tungstenite = "0.24.0"
-env_logger = "0.11.5"
+tokio-util = "0.7.14"
+tauri-plugin-windows-version = "2"
+meval = { git = "https://github.com/infinilabs/meval-rs" }
+chinese-number = "0.7"
+num2words = "1"
+tauri-plugin-log = "2"
+chrono = "0.4.41"
+serde_plain = "1.0.2"
+derive_more = { version = "2.0.1", features = ["display"] }
+anyhow = "1.0.98"
+function_name = "0.3.0"
+regex = "1.11.1"
+borrowme = "0.0.15"
+tauri-plugin-opener = "2"
+async-recursion = "1.1.1"
+zip = "4.0.0"
+url = "2.5.2"
+camino = "1.1.10"
+tokio-stream = { version = "0.1.17", features = ["io-util"] }
+cfg-if = "1.0.1"
+sysinfo = "0.35.2"
+indexmap = { version = "2.10.0", features = ["serde"] }
+strum = { version = "0.27.2", features = ["derive"] }
+sys-locale = "0.3.2"
 
 [target."cfg(target_os = \"macos\")".dependencies]
 tauri-nspanel = { git = "https://github.com/ahkohd/tauri-nspanel", branch = "v2" }
@@ -75,7 +115,6 @@ tauri-nspanel = { git = "https://github.com/ahkohd/tauri-nspanel", branch = "v2"
 [target."cfg(any(target_os = \"macos\", windows, target_os = \"linux\"))".dependencies]
 tauri-plugin-single-instance = { version = "2.0.0", features = ["deep-link"] }
 
-
 [profile.dev]
 incremental = true # Compile your binary in smaller steps.
 
@@ -89,3 +128,10 @@ strip = true # Ensures debug symbols are removed.
 [target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
 tauri-plugin-autostart = "^2.2"
 tauri-plugin-global-shortcut = "2"
+tauri-plugin-updater = { git = "https://github.com/infinilabs/plugins-workspace", branch = "v2" }
+# This should be compatible with the semver used by `tauri-plugin-updater`
+semver = { version = "1", features = ["serde"] }
+
+[target."cfg(target_os = \"windows\")".dependencies]
+enigo="0.3"
+windows = { version = "0.61.3", features = ["Win32_Foundation", "Win32_System_Com", "Win32_System_Ole", "Win32_System_Search", "Win32_UI_Shell_PropertiesSystem", "Win32_Data"] }

src-tauri/Info.plist

@@ -31,5 +31,12 @@
       </array>
     </dict>
   </array>
+  
+  <key>NSMicrophoneUsageDescription</key>
+  <string>Coco AI needs access to your microphone for voice input and audio recording features.</string>
+  <key>NSCameraUsageDescription</key>
+  <string>Coco AI requires camera access for scanning documents and capturing images.</string>
+  <key>NSSpeechRecognitionUsageDescription</key>
+  <string>Coco AI uses speech recognition to convert your voice into text for a hands-free experience.</string>
 </dict>
 </plist>

src-tauri/build.rs

@@ -1,3 +1,14 @@
 fn main() {
-    tauri_build::build()
+    tauri_build::build();
+
+    // If env var `GITHUB_ACTIONS` exists, we are running in CI, set up the `ci`
+    // attribute
+    if std::env::var("GITHUB_ACTIONS").is_ok() {
+        println!("cargo:rustc-cfg=ci");
+    }
+
+    // Notify `rustc` of this `cfg` attribute to suppress unknown attribute warnings.
+    //
+    // unexpected condition name: `ci`
+    println!("cargo::rustc-check-cfg=cfg(ci)");
 }

src-tauri/capabilities/default.json

@@ -2,7 +2,7 @@
   "$schema": "../gen/schemas/desktop-schema.json",
   "identifier": "default",
   "description": "Capability for the main window",
-  "windows": ["main", "chat", "settings"],
+  "windows": ["main", "chat", "settings", "check"],
   "permissions": [
     "core:default",
     "core:event:allow-emit",
@@ -29,6 +29,7 @@
     "core:window:allow-set-focus",
     "core:window:allow-set-always-on-top",
     "core:window:deny-internal-toggle-maximize",
+    "core:window:allow-set-shadow",
     "core:app:allow-set-app-theme",
     "shell:default",
     "http:default",
@@ -36,9 +37,6 @@
     "http:allow-fetch-cancel",
     "http:allow-fetch-read-body",
     "http:allow-fetch-send",
-    "websocket:default",
-    "websocket:allow-connect",
-    "websocket:allow-send",
     "autostart:allow-enable",
     "autostart:allow-disable",
     "autostart:allow-is-enabled",
@@ -67,6 +65,11 @@
     "macos-permissions:default",
     "screenshots:default",
     "core:window:allow-set-theme",
-    "process:default"
+    "process:default",
+    "updater:default",
+    "windows-version:default",
+    "log:default",
+    "opener:default",
+    "core:window:allow-unminimize"
   ]
 }

src-tauri/capabilities/desktop.json

@@ -9,6 +9,7 @@
     "autostart:allow-enable",
     "autostart:allow-disable",
     "autostart:allow-is-enabled",
-    "global-shortcut:default"
+    "global-shortcut:default",
+    "updater:default"
   ]
 }

src-tauri/rust-toolchain.toml

@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly-2025-06-26"

src-tauri/src/assistant/mod.rs

@@ -1,62 +1,60 @@
 use crate::common::assistant::ChatRequestMessage;
-use crate::common::http::GetResponse;
+use crate::common::http::convert_query_params_to_strings;
+use crate::common::register::SearchSourceRegistry;
 use crate::server::http_client::HttpClient;
-use reqwest::Response;
+use crate::{common, server::servers::COCO_SERVERS};
+use futures::StreamExt;
+use futures::stream::FuturesUnordered;
+use futures_util::TryStreamExt;
+use http::Method;
 use serde_json::Value;
 use std::collections::HashMap;
-use tauri::{AppHandle, Runtime};
+use tauri::{AppHandle, Emitter, Manager};
+use tokio::io::AsyncBufReadExt;
 
 #[tauri::command]
-pub async fn chat_history<R: Runtime>(
-    app_handle: AppHandle<R>,
+pub async fn chat_history(
+    _app_handle: AppHandle,
     server_id: String,
     from: u32,
     size: u32,
+    query: Option<String>,
 ) -> Result<String, String> {
-    let mut query_params: HashMap<String, Value> = HashMap::new();
-    if from > 0 {
-        query_params.insert("from".to_string(), from.into());
-    }
-    if size > 0 {
-        query_params.insert("size".to_string(), size.into());
+    let mut query_params = Vec::new();
+
+    // Add from/size as number values
+    query_params.push(format!("from={}", from));
+    query_params.push(format!("size={}", size));
+
+    if let Some(query) = query {
+        if !query.is_empty() {
+            query_params.push(format!("query={}", query.to_string()));
+        }
     }
 
     let response = HttpClient::get(&server_id, "/chat/_history", Some(query_params))
         .await
-        .map_err(|e| format!("Error get sessions: {}", e))?;
+        .map_err(|e| {
+            dbg!("Error get history: {}", &e);
+            format!("Error get history: {}", e)
+        })?;
 
-    handle_raw_response(response).await?
-}
-
-async fn handle_raw_response(response: Response) -> Result<Result<String, String>, String> {
-    Ok(
-        if response.status().as_u16() < 200 || response.status().as_u16() >= 400 {
-            Err("Failed to send message".to_string())
-        } else {
-            let body = response
-                .text()
-                .await
-                .map_err(|e| format!("Failed to parse response JSON: {}", e))?;
-            Ok(body)
-        },
-    )
+    common::http::get_response_body_text(response).await
 }
 
 #[tauri::command]
-pub async fn session_chat_history<R: Runtime>(
-    app_handle: AppHandle<R>,
+pub async fn session_chat_history(
+    _app_handle: AppHandle,
     server_id: String,
     session_id: String,
     from: u32,
     size: u32,
 ) -> Result<String, String> {
-    let mut query_params: HashMap<String, Value> = HashMap::new();
-    if from > 0 {
-        query_params.insert("from".to_string(), from.into());
-    }
-    if size > 0 {
-        query_params.insert("size".to_string(), size.into());
-    }
+    let mut query_params = Vec::new();
+
+    // Add from/size as number values
+    query_params.push(format!("from={}", from));
+    query_params.push(format!("size={}", size));
 
     let path = format!("/chat/{}/_history", session_id);
 
@@ -64,112 +62,438 @@ pub async fn session_chat_history<R: Runtime>(
         .await
         .map_err(|e| format!("Error get session message: {}", e))?;
 
-    handle_raw_response(response).await?
+    common::http::get_response_body_text(response).await
 }
 
 #[tauri::command]
-pub async fn open_session_chat<R: Runtime>(
-    app_handle: AppHandle<R>,
+pub async fn open_session_chat(
+    _app_handle: AppHandle,
     server_id: String,
     session_id: String,
 ) -> Result<String, String> {
-    let mut query_params = HashMap::new();
     let path = format!("/chat/{}/_open", session_id);
 
-    let response = HttpClient::post(&server_id, path.as_str(), Some(query_params), None)
+    let response = HttpClient::post(&server_id, path.as_str(), None, None)
         .await
         .map_err(|e| format!("Error open session: {}", e))?;
 
-    handle_raw_response(response).await?
+    common::http::get_response_body_text(response).await
 }
 
 #[tauri::command]
-pub async fn close_session_chat<R: Runtime>(
-    app_handle: AppHandle<R>,
+pub async fn close_session_chat(
+    _app_handle: AppHandle,
     server_id: String,
     session_id: String,
 ) -> Result<String, String> {
-    let mut query_params = HashMap::new();
     let path = format!("/chat/{}/_close", session_id);
 
-    let response = HttpClient::post(&server_id, path.as_str(), Some(query_params), None)
+    let response = HttpClient::post(&server_id, path.as_str(), None, None)
         .await
         .map_err(|e| format!("Error close session: {}", e))?;
 
-    handle_raw_response(response).await?
+    common::http::get_response_body_text(response).await
 }
 #[tauri::command]
-pub async fn cancel_session_chat<R: Runtime>(
-    app_handle: AppHandle<R>,
+pub async fn cancel_session_chat(
+    _app_handle: AppHandle,
     server_id: String,
     session_id: String,
+    query_params: Option<HashMap<String, Value>>,
 ) -> Result<String, String> {
-    let mut query_params = HashMap::new();
     let path = format!("/chat/{}/_cancel", session_id);
+    let query_params = convert_query_params_to_strings(query_params);
 
-    let response = HttpClient::post(&server_id, path.as_str(), Some(query_params), None)
+    let response = HttpClient::post(&server_id, path.as_str(), query_params, None)
         .await
         .map_err(|e| format!("Error cancel session: {}", e))?;
 
-    handle_raw_response(response).await?
+    common::http::get_response_body_text(response).await
 }
 
 #[tauri::command]
-pub async fn new_chat<R: Runtime>(
-    app_handle: AppHandle<R>,
+pub async fn chat_create(
+    app_handle: AppHandle,
     server_id: String,
-    message: String,
-    query_params: Option<HashMap<String, Value>>, //search,deep_thinking
-) -> Result<GetResponse, String> {
-    let body = if !message.is_empty() {
-        let message = ChatRequestMessage {
-            message: Some(message),
+    message: Option<String>,
+    attachments: Option<Vec<String>>,
+    query_params: Option<HashMap<String, Value>>,
+    client_id: String,
+) -> Result<(), String> {
+    println!("chat_create message: {:?}", message);
+    println!("chat_create attachments: {:?}", attachments);
+
+    let message_empty = message.as_ref().map_or(true, |m| m.is_empty());
+    let attachments_empty = attachments.as_ref().map_or(true, |a| a.is_empty());
+
+    if message_empty && attachments_empty {
+        return Err("Message and attachments are empty".to_string());
+    }
+
+    let body = {
+        let request_message: ChatRequestMessage = ChatRequestMessage {
+            message,
+            attachments,
         };
-        let body = reqwest::Body::from(serde_json::to_string(&message).unwrap());
-        Some(body)
-    } else {
-        None
+
+        println!("chat_create body: {:?}", request_message);
+
+        Some(
+            serde_json::to_string(&request_message)
+                .map_err(|e| format!("Failed to serialize message: {}", e))?
+                .into(),
+        )
     };
 
-    let response = HttpClient::post(&server_id, "/chat/_new", query_params, body)
-        .await
-        .map_err(|e| format!("Error sending message: {}", e))?;
+    let response = HttpClient::advanced_post(
+        &server_id,
+        "/chat/_create",
+        None,
+        convert_query_params_to_strings(query_params),
+        body,
+    )
+    .await
+    .map_err(|e| format!("Error sending message: {}", e))?;
 
-    if response.status().as_u16() < 200 || response.status().as_u16() >= 400 {
-        return Err("Failed to send message".to_string());
+    if response.status() == 429 {
+        log::warn!("Rate limit exceeded for chat create");
+        return Err("Rate limited".to_string());
     }
 
-    let chat_response: GetResponse = response
-        .json()
-        .await
-        .map_err(|e| format!("Failed to parse response JSON: {}", e))?;
-
-    // Check the result and status fields
-    if chat_response.result != "created" {
-        return Err(format!("Unexpected result: {}", chat_response.result));
+    if !response.status().is_success() {
+        return Err(format!("Request failed with status: {}", response.status()));
     }
 
-    Ok(chat_response)
+    let stream = response.bytes_stream();
+    let reader = tokio_util::io::StreamReader::new(
+        stream.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e)),
+    );
+    let mut lines = tokio::io::BufReader::new(reader).lines();
+
+    log::info!("client_id_create: {}", &client_id);
+
+    while let Ok(Some(line)) = lines.next_line().await {
+        log::info!("Received chat stream line: {}", &line);
+
+        if let Err(err) = app_handle.emit(&client_id, line) {
+            log::error!("Emit failed: {:?}", err);
+
+            let _ = app_handle.emit("chat-create-error", format!("Emit failed: {:?}", err));
+        }
+    }
+
+    Ok(())
 }
 
 #[tauri::command]
-pub async fn send_message<R: Runtime>(
-    app_handle: AppHandle<R>,
+pub async fn chat_chat(
+    app_handle: AppHandle,
     server_id: String,
     session_id: String,
-    message: String,
+    message: Option<String>,
+    attachments: Option<Vec<String>>,
     query_params: Option<HashMap<String, Value>>, //search,deep_thinking
-) -> Result<String, String> {
-    let path = format!("/chat/{}/_send", session_id);
-    let msg = ChatRequestMessage {
-        message: Some(message),
+    client_id: String,
+) -> Result<(), String> {
+    println!("chat_chat message: {:?}", message);
+    println!("chat_chat attachments: {:?}", attachments);
+
+    let message_empty = message.as_ref().map_or(true, |m| m.is_empty());
+    let attachments_empty = attachments.as_ref().map_or(true, |a| a.is_empty());
+
+    if message_empty && attachments_empty {
+        return Err("Message and attachments are empty".to_string());
+    }
+
+    let body = {
+        let request_message = ChatRequestMessage {
+            message,
+            attachments,
+        };
+
+        println!("chat_chat body: {:?}", request_message);
+
+        Some(
+            serde_json::to_string(&request_message)
+                .map_err(|e| format!("Failed to serialize message: {}", e))?
+                .into(),
+        )
     };
 
-    let body = reqwest::Body::from(serde_json::to_string(&msg).unwrap());
-    let response =
-        HttpClient::advanced_post(&server_id, path.as_str(), None, query_params, Some(body))
-            .await
-            .map_err(|e| format!("Error cancel session: {}", e))?;
+    let path = format!("/chat/{}/_chat", session_id);
 
-    handle_raw_response(response).await?
+    let response = HttpClient::advanced_post(
+        &server_id,
+        path.as_str(),
+        None,
+        convert_query_params_to_strings(query_params),
+        body,
+    )
+    .await
+    .map_err(|e| format!("Error sending message: {}", e))?;
+
+    if response.status() == 429 {
+        log::warn!("Rate limit exceeded for chat create");
+        return Err("Rate limited".to_string());
+    }
+
+    if !response.status().is_success() {
+        return Err(format!("Request failed with status: {}", response.status()));
+    }
+
+    let stream = response.bytes_stream();
+    let reader = tokio_util::io::StreamReader::new(
+        stream.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e)),
+    );
+    let mut lines = tokio::io::BufReader::new(reader).lines();
+    let mut first_log = true;
+
+    log::info!("client_id: {}", &client_id);
+
+    while let Ok(Some(line)) = lines.next_line().await {
+        log::info!("Received chat stream line: {}", &line);
+        if first_log {
+            log::info!("first stream line: {}", &line);
+            first_log = false;
+        }
+
+        if let Err(err) = app_handle.emit(&client_id, line) {
+            log::error!("Emit failed: {:?}", err);
+
+            print!("Error sending message: {:?}", err);
+
+            let _ = app_handle.emit("chat-create-error", format!("Emit failed: {:?}", err));
+        }
+    }
+
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn delete_session_chat(server_id: String, session_id: String) -> Result<bool, String> {
+    let response =
+        HttpClient::delete(&server_id, &format!("/chat/{}", session_id), None, None).await?;
+
+    if response.status().is_success() {
+        Ok(true)
+    } else {
+        Err(format!("Delete failed with status: {}", response.status()))
+    }
+}
+
+#[tauri::command]
+pub async fn update_session_chat(
+    server_id: String,
+    session_id: String,
+    title: Option<String>,
+    context: Option<HashMap<String, Value>>,
+) -> Result<bool, String> {
+    let mut body = HashMap::new();
+    if let Some(title) = title {
+        body.insert("title".to_string(), Value::String(title));
+    }
+    if let Some(context) = context {
+        body.insert(
+            "context".to_string(),
+            Value::Object(context.into_iter().collect()),
+        );
+    }
+
+    let response = HttpClient::put(
+        &server_id,
+        &format!("/chat/{}", session_id),
+        None,
+        None,
+        Some(reqwest::Body::from(serde_json::to_string(&body).unwrap())),
+    )
+    .await
+    .map_err(|e| format!("Error updating session: {}", e))?;
+
+    Ok(response.status().is_success())
+}
+
+#[tauri::command]
+pub async fn assistant_search(
+    _app_handle: AppHandle,
+    server_id: String,
+    query_params: Option<Vec<String>>,
+) -> Result<Value, String> {
+    let response = HttpClient::post(&server_id, "/assistant/_search", query_params, None)
+        .await
+        .map_err(|e| format!("Error searching assistants: {}", e))?;
+
+    response
+        .json::<Value>()
+        .await
+        .map_err(|err| err.to_string())
+}
+
+#[tauri::command]
+pub async fn assistant_get(
+    _app_handle: AppHandle,
+    server_id: String,
+    assistant_id: String,
+) -> Result<Value, String> {
+    let response = HttpClient::get(
+        &server_id,
+        &format!("/assistant/{}", assistant_id),
+        None, // headers
+    )
+    .await
+    .map_err(|e| format!("Error getting assistant: {}", e))?;
+
+    response
+        .json::<Value>()
+        .await
+        .map_err(|err| err.to_string())
+}
+
+/// Gets the information of the assistant specified by `assistant_id` by querying **all**
+/// Coco servers.
+///
+/// Returns as soon as the assistant is found on any Coco server.
+#[tauri::command]
+pub async fn assistant_get_multi(
+    app_handle: AppHandle,
+    assistant_id: String,
+) -> Result<Value, String> {
+    let search_sources = app_handle.state::<SearchSourceRegistry>();
+    let sources_future = search_sources.get_sources();
+    let sources_list = sources_future.await;
+
+    let mut futures = FuturesUnordered::new();
+
+    for query_source in &sources_list {
+        let query_source_type = query_source.get_type();
+        if query_source_type.r#type != COCO_SERVERS {
+            // Assistants only exists on Coco servers.
+            continue;
+        }
+
+        let coco_server_id = query_source_type.id.clone();
+
+        let path = format!("/assistant/{}", assistant_id);
+
+        let fut = async move {
+            let res_response = HttpClient::get(
+                &coco_server_id,
+                &path,
+                None, // headers
+            )
+            .await;
+            match res_response {
+                Ok(response) => response
+                    .json::<serde_json::Value>()
+                    .await
+                    .map_err(|e| e.to_string()),
+                Err(e) => Err(e),
+            }
+        };
+
+        futures.push(fut);
+    }
+
+    while let Some(res_response_json) = futures.next().await {
+        let response_json = match res_response_json {
+            Ok(json) => json,
+            Err(e) => return Err(e),
+        };
+
+        // Example response JSON
+        //
+        // When assistant is not found:
+        // ```json
+        // {
+        //   "_id": "ID",
+        //   "result": "not_found"
+        // }
+        // ```
+        //
+        // When assistant is found:
+        // ```json
+        // {
+        //   "_id": "ID",
+        //   "_source": {...}
+        //   "found": true
+        // }
+        // ```
+        if let Some(found) = response_json.get("found") {
+            if found == true {
+                return Ok(response_json);
+            }
+        }
+    }
+
+    Err(format!(
+        "could not find Assistant [{}] on all the Coco servers",
+        assistant_id
+    ))
+}
+
+use regex::Regex;
+/// Remove all `"icon": "..."` fields from a JSON string
+pub fn remove_icon_fields(json: &str) -> String {
+    // Regex to match `"icon": "..."` fields, including base64 or escaped strings
+    let re = Regex::new(r#""icon"\s*:\s*"[^"]*"(,?)"#).unwrap();
+    // Replace with empty string, or just remove trailing comma if needed
+    re.replace_all(json, |caps: &regex::Captures| {
+        if &caps[1] == "," {
+            "".to_string() // keep comma removal logic safe
+        } else {
+            "".to_string()
+        }
+    })
+    .to_string()
+}
+
+#[tauri::command]
+pub async fn ask_ai(
+    app_handle: AppHandle,
+    message: String,
+    server_id: String,
+    assistant_id: String,
+    client_id: String,
+) -> Result<(), String> {
+    let cleaned = remove_icon_fields(message.as_str());
+
+    let body = serde_json::json!({ "message": cleaned });
+
+    let path = format!("/assistant/{}/_ask", assistant_id);
+
+    println!("Sending request to {}", &path);
+
+    let response = HttpClient::send_request(
+        server_id.as_str(),
+        Method::POST,
+        path.as_str(),
+        None,
+        None,
+        Some(reqwest::Body::from(body.to_string())),
+    )
+    .await?;
+
+    if response.status() == 429 {
+        log::warn!("Rate limit exceeded for assistant: {}", &assistant_id);
+        return Ok(());
+    }
+
+    if !response.status().is_success() {
+        return Err(format!("Request Failed: {}", response.status()));
+    }
+
+    let stream = response.bytes_stream();
+    let reader = tokio_util::io::StreamReader::new(
+        stream.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e)),
+    );
+    let mut lines = tokio::io::BufReader::new(reader).lines();
+
+    while let Ok(Some(line)) = lines.next_line().await {
+        dbg!("Received line: {}", &line);
+
+        let _ = app_handle.emit(&client_id, line).map_err(|err| {
+            println!("Failed to emit: {:?}", err);
+        });
+    }
+
+    Ok(())
 }

src-tauri/src/autostart.rs

@@ -1,43 +1,48 @@
 use std::{fs::create_dir, io::Read};
 
-use tauri::{Manager, Runtime};
+use tauri::{AppHandle, Manager};
 use tauri_plugin_autostart::ManagerExt;
 
-// Start or stop according to configuration
-pub fn enable_autostart(app: &mut tauri::App) {
-    use tauri_plugin_autostart::MacosLauncher;
-    use tauri_plugin_autostart::ManagerExt;
+/// If the state reported from the OS and the state stored by us differ, our state is
+/// prioritized and seen as the correct one. Update the OS state to make them consistent.
+pub fn ensure_autostart_state_consistent(tauri_app_handle: &AppHandle) -> Result<(), String> {
+    let autostart_manager = tauri_app_handle.autolaunch();
 
-    app.handle()
-        .plugin(tauri_plugin_autostart::init(
-            MacosLauncher::AppleScript,
-            None,
-        ))
-        .unwrap();
+    let os_state = autostart_manager.is_enabled().map_err(|e| e.to_string())?;
+    let coco_stored_state = current_autostart(tauri_app_handle).map_err(|e| e.to_string())?;
 
-    let autostart_manager = app.autolaunch();
+    if os_state != coco_stored_state {
+        log::warn!(
+            "autostart inconsistent states, OS state [{}], Coco state [{}], config file could be deleted or corrupted",
+            os_state,
+            coco_stored_state
+        );
+        log::info!("trying to correct the inconsistent states");
 
-    // close autostart
-    // autostart_manager.disable().unwrap();
-    // return;
+        let result = if coco_stored_state {
+            autostart_manager.enable()
+        } else {
+            autostart_manager.disable()
+        };
 
-    match (
-        autostart_manager.is_enabled(),
-        current_autostart(app.app_handle()),
-    ) {
-        (Ok(false), Ok(true)) => match autostart_manager.enable() {
-            Ok(_) => println!("Autostart enabled successfully."),
-            Err(err) => eprintln!("Failed to enable autostart: {}", err),
-        },
-        (Ok(true), Ok(false)) => match autostart_manager.disable() {
-            Ok(_) => println!("Autostart disable successfully."),
-            Err(err) => eprintln!("Failed to disable autostart: {}", err),
-        },
-        _ => (),
+        match result {
+            Ok(_) => {
+                log::info!("inconsistent autostart states fixed");
+            }
+            Err(e) => {
+                log::error!(
+                    "failed to fix inconsistent autostart state due to error [{}]",
+                    e
+                );
+                return Err(e.to_string());
+            }
+        }
     }
+
+    Ok(())
 }
 
-fn current_autostart<R: Runtime>(app: &tauri::AppHandle<R>) -> Result<bool, String> {
+fn current_autostart(app: &tauri::AppHandle) -> Result<bool, String> {
     use std::fs::File;
 
     let path = app.path().app_config_dir().unwrap();
@@ -60,7 +65,7 @@ fn current_autostart<R: Runtime>(app: &tauri::AppHandle<R>) -> Result<bool, Stri
 }
 
 #[tauri::command]
-pub fn change_autostart<R: Runtime>(app: tauri::AppHandle<R>, open: bool) -> Result<(), String> {
+pub async fn change_autostart(app: tauri::AppHandle, open: bool) -> Result<(), String> {
     use std::fs::File;
     use std::io::Write;
 

src-tauri/src/common/assistant.rs

@@ -3,18 +3,22 @@ use serde_json::Value;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ChatRequestMessage {
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub attachments: Option<Vec<String>>,
 }
 
+#[allow(dead_code)]
 pub struct NewChatResponse {
     pub _id: String,
-    pub _source: Source,
+    pub _source: Session,
     pub result: String,
     pub payload: Option<Value>,
 }
 
 #[derive(Debug, Serialize, Deserialize)]
-pub struct Source {
+pub struct Session {
     pub id: String,
     pub created: String,
     pub updated: String,
@@ -22,4 +26,11 @@ pub struct Source {
     pub title: Option<String>,
     pub summary: Option<String>,
     pub manually_renamed_title: bool,
-}
+    pub visible: Option<bool>,
+    pub context: Option<SessionContext>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct SessionContext {
+    pub attachments: Option<Vec<String>>,
+}

src-tauri/src/common/connector.rs

@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 
-#[derive(Debug,Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Connector {
     pub id: String,
     pub created: Option<String>,
@@ -13,7 +13,7 @@ pub struct Connector {
     pub url: Option<String>,
     pub assets: Option<ConnectorAssets>,
 }
-#[derive(Debug,Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ConnectorAssets {
     pub icons: Option<std::collections::HashMap<String, String>>,
-}
+}

src-tauri/src/common/datasource.rs

@@ -18,4 +18,4 @@ pub struct DataSource {
 pub struct ConnectorConfig {
     pub id: Option<String>,
     pub config: Option<serde_json::Value>, // Using serde_json::Value to handle any type of config
-}
+}

src-tauri/src/common/document.rs

@@ -1,5 +1,7 @@
+use crate::extension::ExtensionSettings;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
+use tauri::AppHandle;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct RichLabel {
@@ -13,6 +15,7 @@ pub struct DataSourceReference {
     pub r#type: Option<String>,
     pub name: Option<String>,
     pub id: Option<String>,
+    pub icon: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -28,7 +31,179 @@ pub struct EditorInfo {
     pub timestamp: Option<String>,
 }
 
+/// Defines the action that would be performed when a [document](Document) gets opened.
+///
+/// "Document" is a uniform type that the backend uses to send the search results
+/// back to the frontend.  Since Coco can search many sources, "Document" can
+/// represent different things, application, web page, local file, extensions, and
+/// so on.  Each has its own specific open action.
 #[derive(Debug, Clone, Serialize, Deserialize)]
+pub(crate) enum OnOpened {
+    /// Launch the application
+    Application { app_path: String },
+    /// Open the URL.
+    Document { url: String },
+    /// The document is an extension.
+    Extension(ExtensionOnOpened),
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub(crate) struct ExtensionOnOpened {
+    /// Different types of extensions have different open behaviors.
+    pub(crate) ty: ExtensionOnOpenedType,
+    /// Extensions settings.  Some could affect open action.
+    ///
+    /// Optional because not all extensions have their settings.
+    pub(crate) settings: Option<ExtensionSettings>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub(crate) enum ExtensionOnOpenedType {
+    /// Spawn a child process to run the `CommandAction`.
+    Command {
+        action: crate::extension::CommandAction,
+    },
+    /// Open the `link`.
+    //
+    // NOTE that this variant has the same definition as `struct Quicklink`, but we
+    // cannot use it directly, its `link` field should be deserialized/serialized
+    // from/to a string, but we need a JSON object here.
+    //
+    // See also the comments in `struct Quicklink`.
+    Quicklink {
+        link: crate::extension::QuicklinkLink,
+        open_with: Option<String>,
+    },
+}
+
+impl OnOpened {
+    pub(crate) fn url(&self) -> String {
+        match self {
+            Self::Application { app_path } => app_path.clone(),
+            Self::Document { url } => url.clone(),
+            Self::Extension(ext_on_opened) => {
+                match &ext_on_opened.ty {
+                    ExtensionOnOpenedType::Command { action } => {
+                        const WHITESPACE: &str = " ";
+                        let mut ret = action.exec.clone();
+                        ret.push_str(WHITESPACE);
+                        if let Some(ref args) = action.args {
+                            ret.push_str(args.join(WHITESPACE).as_str());
+                        }
+
+                        ret
+                    }
+                    // Currently, our URL is static and does not support dynamic parameters.
+                    // The URL of a quicklink is nearly useless without such dynamic user
+                    // inputs, so until we have dynamic URL support, we just use "N/A".
+                    ExtensionOnOpenedType::Quicklink { .. } => String::from("N/A"),
+                }
+            }
+        }
+    }
+}
+
+#[tauri::command]
+pub(crate) async fn open(
+    tauri_app_handle: AppHandle,
+    on_opened: OnOpened,
+    extra_args: Option<HashMap<String, String>>,
+) -> Result<(), String> {
+    use crate::util::open as homemade_tauri_shell_open;
+    use std::process::Command;
+
+    match on_opened {
+        OnOpened::Application { app_path } => {
+            log::debug!("open application [{}]", app_path);
+
+            homemade_tauri_shell_open(tauri_app_handle.clone(), app_path).await?
+        }
+        OnOpened::Document { url } => {
+            log::debug!("open document [{}]", url);
+
+            homemade_tauri_shell_open(tauri_app_handle.clone(), url).await?
+        }
+        OnOpened::Extension(ext_on_opened) => {
+            // Apply the settings that would affect open behavior
+            if let Some(settings) = ext_on_opened.settings {
+                if let Some(should_hide) = settings.hide_before_open {
+                    if should_hide {
+                        crate::hide_coco(tauri_app_handle.clone()).await;
+                    }
+                }
+            }
+
+            match ext_on_opened.ty {
+                ExtensionOnOpenedType::Command { action } => {
+                    log::debug!("open (execute) command [{:?}]", action);
+
+                    let mut cmd = Command::new(action.exec);
+                    if let Some(args) = action.args {
+                        cmd.args(args);
+                    }
+                    let output = cmd.output().map_err(|e| e.to_string())?;
+                    // Sometimes, we wanna see the result in logs even though it doesn't fail.
+                    log::debug!(
+                        "executing open(Command) result, exit code: [{}], stdout: [{}], stderr: [{}]",
+                        output.status,
+                        String::from_utf8_lossy(&output.stdout),
+                        String::from_utf8_lossy(&output.stderr)
+                    );
+                    if !output.status.success() {
+                        log::warn!(
+                            "executing open(Command) failed, exit code: [{}], stdout: [{}], stderr: [{}]",
+                            output.status,
+                            String::from_utf8_lossy(&output.stdout),
+                            String::from_utf8_lossy(&output.stderr)
+                        );
+
+                        return Err(format!(
+                            "Command failed, stderr [{}]",
+                            String::from_utf8_lossy(&output.stderr)
+                        ));
+                    }
+                }
+                ExtensionOnOpenedType::Quicklink {
+                    link,
+                    open_with: opt_open_with,
+                } => {
+                    let url = link.concatenate_url(&extra_args);
+
+                    log::debug!("open quicklink [{}] with [{:?}]", url, opt_open_with);
+
+                    cfg_if::cfg_if! {
+                        // The `open_with` functionality is only supported on macOS, provided
+                        // by the `open -a` command.
+                        if #[cfg(target_os = "macos")] {
+                            let mut cmd = Command::new("open");
+                            if let Some(ref open_with) = opt_open_with {
+                                cmd.arg("-a");
+                                cmd.arg(open_with.as_str());
+                            }
+                            cmd.arg(&url);
+
+                            let output = cmd.output().map_err(|e| format!("failed to spawn [open] due to error [{}]", e))?;
+
+                            if !output.status.success() {
+                              return Err(format!(
+                                "failed to open with app {:?}: {}",
+                                opt_open_with,
+                                String::from_utf8_lossy(&output.stderr)
+                              ));
+                            }
+                        } else {
+                            homemade_tauri_shell_open(tauri_app_handle.clone(), url).await?
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    Ok(())
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct Document {
     pub id: String,
     pub created: Option<String>,
@@ -47,6 +222,8 @@ pub struct Document {
     pub thumbnail: Option<String>,
     pub cover: Option<String>,
     pub tags: Option<Vec<String>>,
+    /// What will happen if we open this document.
+    pub on_opened: Option<OnOpened>,
     pub url: Option<String>,
     pub size: Option<i64>,
     pub metadata: Option<HashMap<String, serde_json::Value>>,
@@ -54,32 +231,3 @@ pub struct Document {
     pub owner: Option<UserInfo>,
     pub last_updated_by: Option<EditorInfo>,
 }
-impl Document {
-    pub fn new(source: Option<DataSourceReference>, id: String, category: String, name: String, url: String) -> Self {
-        Self {
-            id,
-            created: None,
-            updated: None,
-            source,
-            r#type: None,
-            category: Some(category),
-            subcategory: None,
-            categories: None,
-            rich_categories: None,
-            title: Some(name),
-            summary: None,
-            lang: None,
-            content: None,
-            icon: None,
-            thumbnail: None,
-            cover: None,
-            tags: None,
-            url: Some(url),
-            size: None,
-            metadata: None,
-            payload: None,
-            owner: None,
-            last_updated_by: None,
-        }
-    }
-}

src-tauri/src/common/error.rs

@@ -0,0 +1,81 @@
+use reqwest::StatusCode;
+use serde::{Deserialize, Serialize, Serializer};
+use thiserror::Error;
+
+fn serialize_optional_status_code<S>(
+    status_code: &Option<StatusCode>,
+    serializer: S,
+) -> Result<S::Ok, S::Error>
+where
+    S: Serializer,
+{
+    match status_code {
+        Some(code) => serializer.serialize_str(&format!("{:?}", code)),
+        None => serializer.serialize_none(),
+    }
+}
+
+#[allow(unused)]
+#[derive(Debug, Deserialize)]
+pub struct ErrorCause {
+    #[serde(default)]
+    pub r#type: Option<String>,
+    #[serde(default)]
+    pub reason: Option<String>,
+}
+
+#[derive(Debug, Deserialize)]
+#[allow(unused)]
+pub struct ErrorDetail {
+    #[serde(default)]
+    pub root_cause: Option<Vec<ErrorCause>>,
+    #[serde(default)]
+    pub r#type: Option<String>,
+    #[serde(default)]
+    pub reason: Option<String>,
+    #[serde(default)]
+    pub caused_by: Option<ErrorCause>,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct ErrorResponse {
+    #[serde(default)]
+    pub error: Option<ErrorDetail>,
+    #[serde(default)]
+    #[allow(unused)]
+    pub status: Option<u16>,
+}
+
+#[derive(Debug, Error, Serialize)]
+pub enum SearchError {
+    #[error("HttpError: status code [{status_code:?}], msg [{msg}]")]
+    HttpError {
+        #[serde(serialize_with = "serialize_optional_status_code")]
+        status_code: Option<StatusCode>,
+        msg: String,
+    },
+
+    #[error("ParseError: {0}")]
+    ParseError(String),
+
+    #[error("Timeout occurred")]
+    Timeout,
+
+    #[error("InternalError: {0}")]
+    InternalError(String),
+}
+
+impl From<reqwest::Error> for SearchError {
+    fn from(err: reqwest::Error) -> Self {
+        if err.is_timeout() {
+            SearchError::Timeout
+        } else if err.is_decode() {
+            SearchError::ParseError(err.to_string())
+        } else {
+            SearchError::HttpError {
+                status_code: err.status(),
+                msg: err.to_string(),
+            }
+        }
+    }
+}

src-tauri/src/common/http.rs

@@ -1,5 +1,9 @@
+use crate::common;
+use reqwest::Response;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
+use std::collections::HashMap;
+use tauri_plugin_store::JsonValue;
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct GetResponse {
@@ -15,4 +19,57 @@ pub struct Source {
     pub created: String,
     pub updated: String,
     pub status: String,
-}
+}
+
+pub async fn get_response_body_text(response: Response) -> Result<String, String> {
+    let status = response.status().as_u16();
+    let body = response
+        .text()
+        .await
+        .map_err(|e| format!("Failed to read response body: {}, code: {}", e, status))?;
+
+    log::debug!("Response status: {}, body: {}", status, &body);
+
+    if status < 200 || status >= 400 {
+        // Try to parse the error body
+        let fallback_error = "Failed to send message".to_string();
+
+        if body.trim().is_empty() {
+            return Err(fallback_error);
+        }
+
+        match serde_json::from_str::<common::error::ErrorResponse>(&body) {
+            Ok(parsed_error) => {
+                dbg!(&parsed_error);
+                Err(format!(
+                    "Server error ({}): {:?}",
+                    status, parsed_error.error
+                ))
+            }
+            Err(_) => {
+                log::warn!("Failed to parse error response: {}", &body);
+                Err(fallback_error)
+            }
+        }
+    } else {
+        Ok(body)
+    }
+}
+
+pub fn convert_query_params_to_strings(
+    query_params: Option<HashMap<String, JsonValue>>,
+) -> Option<Vec<String>> {
+    query_params.map(|map| {
+        map.into_iter()
+            .filter_map(|(k, v)| match v {
+                JsonValue::String(s) => Some(format!("{}={}", k, s)),
+                JsonValue::Number(n) => Some(format!("{}={}", k, n)),
+                JsonValue::Bool(b) => Some(format!("{}={}", k, b)),
+                _ => {
+                    eprintln!("Skipping unsupported query value for key '{}': {:?}", k, v);
+                    None
+                }
+            })
+            .collect()
+    })
+}

src-tauri/src/common/mod.rs

@@ -1,15 +1,17 @@
-pub mod health;
-pub mod profile;
-pub mod server;
-pub mod auth;
-pub mod datasource;
-pub mod connector;
-pub mod search;
-pub mod document;
-pub mod traits;
-pub mod register;
 pub mod assistant;
+pub mod auth;
+pub mod connector;
+pub mod datasource;
+pub mod document;
+pub mod error;
+pub mod health;
 pub mod http;
+pub mod profile;
+pub mod register;
+pub mod search;
+pub mod server;
+pub mod traits;
 
 pub static MAIN_WINDOW_LABEL: &str = "main";
 pub static SETTINGS_WINDOW_LABEL: &str = "settings";
+pub static CHECK_WINDOW_LABEL: &str = "check";

src-tauri/src/common/profile.rs

@@ -1,15 +1,16 @@
-use serde::{Serialize, Deserialize};
+use serde::{Deserialize, Serialize};
 
-#[derive(Debug,Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Preferences {
-    pub theme: String,
-    pub language: String,
+    pub theme: Option<String>,
+    pub language: Option<String>,
 }
 
-#[derive(Debug,Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct UserProfile {
+    pub id: String,
     pub name: String,
     pub email: String,
-    pub avatar: String,
-    pub preferences: Preferences,
-}
+    pub avatar: Option<String>,
+    pub preferences: Option<Preferences>,
+}

src-tauri/src/common/register.rs

@@ -16,6 +16,7 @@ impl SearchSourceRegistry {
         sources.insert(source_id, Arc::new(source));
     }
 
+    #[allow(dead_code)]
     pub async fn clear(&self) {
         let mut sources = self.sources.write().await;
         sources.clear();
@@ -26,6 +27,7 @@ impl SearchSourceRegistry {
         sources.remove(id);
     }
 
+    #[allow(dead_code)]
     pub async fn get_source(&self, id: &str) -> Option<Arc<dyn SearchSource>> {
         let sources = self.sources.read().await;
         sources.get(id).cloned()
@@ -34,4 +36,4 @@ impl SearchSourceRegistry {
         let sources = self.sources.read().await;
         sources.values().cloned().collect() // Returns Vec<Arc<dyn SearchSource>>
     }
-}
+}

src-tauri/src/common/search.rs

@@ -1,14 +1,15 @@
 use crate::common::document::Document;
+use crate::common::http::get_response_body_text;
 use reqwest::Response;
 use serde::{Deserialize, Serialize};
-use serde_json::Value;
 use std::collections::HashMap;
 use std::error::Error;
+
 #[derive(Debug, Serialize, Deserialize)]
 pub struct SearchResponse<T> {
-    pub took: u64,
-    pub timed_out: bool,
-    pub _shards: Shards,
+    pub took: Option<u64>,
+    pub timed_out: Option<bool>,
+    pub _shards: Option<Shards>,
     pub hits: Hits<T>,
 }
 
@@ -24,7 +25,7 @@ pub struct Shards {
 pub struct Hits<T> {
     pub total: Total,
     pub max_score: Option<f32>,
-    pub hits: Vec<SearchHit<T>>,
+    pub hits: Option<Vec<SearchHit<T>>>,
 }
 
 #[derive(Debug, Serialize, Deserialize)]
@@ -35,9 +36,9 @@ pub struct Total {
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct SearchHit<T> {
-    pub _index: String,
-    pub _type: String,
-    pub _id: String,
+    pub _index: Option<String>,
+    pub _type: Option<String>,
+    pub _id: Option<String>,
     pub _score: Option<f64>,
     pub _source: T, // This will hold the type we pass in (e.g., DataSource)
 }
@@ -47,26 +48,28 @@ pub async fn parse_search_response<T>(
 where
     T: for<'de> Deserialize<'de> + std::fmt::Debug,
 {
-    let body = response
-        .json::<Value>()
-        .await
-        .map_err(|e| format!("Failed to parse JSON: {}", e))?;
+    let body_text = get_response_body_text(response).await?;
 
-    // dbg!(&body);
+    // dbg!(&body_text);
 
-    let search_response: SearchResponse<T> = serde_json::from_value(body)
+    let search_response: SearchResponse<T> = serde_json::from_str(&body_text)
         .map_err(|e| format!("Failed to deserialize search response: {}", e))?;
 
     Ok(search_response)
 }
 
+use serde::de::DeserializeOwned;
+
 pub async fn parse_search_hits<T>(response: Response) -> Result<Vec<SearchHit<T>>, Box<dyn Error>>
 where
-    T: for<'de> Deserialize<'de> + std::fmt::Debug,
+    T: DeserializeOwned + std::fmt::Debug,
 {
     let response = parse_search_response(response).await?;
 
-    Ok(response.hits.hits)
+    match response.hits.hits {
+        Some(hits) => Ok(hits),
+        None => Ok(Vec::new()),
+    }
 }
 
 pub async fn parse_search_results<T>(response: Response) -> Result<Vec<T>, Box<dyn Error>>
@@ -80,19 +83,6 @@ where
         .collect())
 }
 
-pub async fn parse_search_results_with_score<T>(
-    response: Response,
-) -> Result<Vec<(T, Option<f64>)>, Box<dyn Error>>
-where
-    T: for<'de> Deserialize<'de> + std::fmt::Debug,
-{
-    Ok(parse_search_hits(response)
-        .await?
-        .into_iter()
-        .map(|hit| (hit._source, hit._score))
-        .collect())
-}
-
 #[derive(Debug, Clone, Serialize)]
 pub struct SearchQuery {
     pub from: u64,

src-tauri/src/common/server.rs

@@ -1,6 +1,8 @@
 use crate::common::health::Health;
 use crate::common::profile::UserProfile;
 use serde::{Deserialize, Serialize};
+use serde_json::Value;
+use std::collections::HashMap;
 use std::hash::{Hash, Hasher};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -29,6 +31,11 @@ pub struct AuthProvider {
     pub sso: Sso,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct MinimalClientVersion {
+    number: String,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Server {
     #[serde(default = "default_empty_string")] // Custom default function for empty string
@@ -39,12 +46,21 @@ pub struct Server {
     pub endpoint: String,
     pub provider: Provider,
     pub version: Version,
+    pub minimal_client_version: Option<MinimalClientVersion>,
     pub updated: String,
     #[serde(default = "default_enabled_type")]
     pub enabled: bool,
+    /// Public Coco servers can be used without signing in.
     #[serde(default = "default_bool_type")]
     pub public: bool,
-    
+
+    /// A coco server is available if:
+    ///
+    /// 1. It is still online, we check this via the `GET /base_url/provider/_info`
+    ///    interface.
+    /// 2. A user is logged in to this Coco server, i.e., a token is stored in the
+    ///    `SERVER_TOKEN_LIST_CACHE`.
+    ///    For public Coco servers, requirement 2 is not needed.
     #[serde(default = "default_available_type")]
     pub available: bool,
 
@@ -54,6 +70,7 @@ pub struct Server {
     pub auth_provider: AuthProvider,
     #[serde(default = "default_priority_type")]
     pub priority: u32,
+    pub stats: Option<HashMap<String, Value>>,
 }
 
 impl PartialEq for Server {
@@ -70,13 +87,15 @@ impl Hash for Server {
     }
 }
 
-
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ServerAccessToken {
     #[serde(default = "default_empty_string")] // Custom default function for empty string
     pub id: String,
     pub access_token: String,
-    pub expired_at: u32, //unix timestamp in seconds
+    /// Unix timestamp in seconds
+    ///
+    /// Currently, this is UNUSED.
+    pub expired_at: u32,
 }
 
 impl ServerAccessToken {
@@ -104,11 +123,11 @@ impl Hash for ServerAccessToken {
 }
 
 fn default_empty_string() -> String {
-    "".to_string()  // Default to empty string if not provided
+    "".to_string() // Default to empty string if not provided
 }
 
 fn default_bool_type() -> bool {
-    false  // Default to false if not provided
+    false // Default to false if not provided
 }
 
 fn default_enabled_type() -> bool {
@@ -123,4 +142,4 @@ fn default_priority_type() -> u32 {
 }
 fn default_user_profile_type() -> Option<UserProfile> {
     None
-}
+}

src-tauri/src/common/traits.rs

@@ -1,44 +1,16 @@
-use crate::common::search::{QueryResponse, QuerySource};
-use thiserror::Error;
-
-use async_trait::async_trait;
-// use std::{future::Future, pin::Pin};
+use crate::common::error::SearchError;
 use crate::common::search::SearchQuery;
-use serde::Serialize;
+use crate::common::search::{QueryResponse, QuerySource};
+use async_trait::async_trait;
+use tauri::AppHandle;
 
 #[async_trait]
 pub trait SearchSource: Send + Sync {
     fn get_type(&self) -> QuerySource;
 
-    async fn search(&self, query: SearchQuery) -> Result<QueryResponse, SearchError>;
-}
-
-#[derive(Debug, Error, Serialize)]
-pub enum SearchError {
-    #[error("HTTP request failed: {0}")]
-    HttpError(String),
-
-    #[error("Invalid response format: {0}")]
-    ParseError(String),
-
-    #[error("Timeout occurred")]
-    Timeout,
-
-    #[error("Unknown error: {0}")]
-    Unknown(String),
-
-    #[error("InternalError error: {0}")]
-    InternalError(String),
-}
-
-impl From<reqwest::Error> for SearchError {
-    fn from(err: reqwest::Error) -> Self {
-        if err.is_timeout() {
-            SearchError::Timeout
-        } else if err.is_decode() {
-            SearchError::ParseError(err.to_string())
-        } else {
-            SearchError::HttpError(err.to_string())
-        }
-    }
+    async fn search(
+        &self,
+        tauri_app_handle: AppHandle,
+        query: SearchQuery,
+    ) -> Result<QueryResponse, SearchError>;
 }

src-tauri/src/extension/built_in/ai_overview.rs

@@ -0,0 +1,13 @@
+pub(super) const EXTENSION_ID: &str = "AIOverview";
+
+/// JSON file for this extension.
+pub(crate) const PLUGIN_JSON_FILE: &str = r#"
+{
+  "id": "AIOverview",
+  "name": "AI Overview",
+  "description": "...",
+  "icon": "font_a-AIOverview",
+  "type": "ai_extension",
+  "enabled": true
+}
+"#;

src-tauri/src/extension/built_in/application/mod.rs

@@ -0,0 +1,50 @@
+use serde::Serialize;
+
+#[cfg(feature = "use_pizza_engine")]
+mod with_feature;
+
+#[cfg(not(feature = "use_pizza_engine"))]
+mod without_feature;
+
+#[cfg(feature = "use_pizza_engine")]
+pub use with_feature::*;
+
+#[cfg(not(feature = "use_pizza_engine"))]
+pub use without_feature::*;
+
+#[derive(Debug, Serialize, Clone)]
+#[serde(rename_all = "camelCase")]
+#[allow(dead_code)]
+
+pub struct AppEntry {
+    path: String,
+    name: String,
+    icon_path: String,
+    alias: String,
+    hotkey: String,
+    is_disabled: bool,
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct AppMetadata {
+    name: String,
+    r#where: String,
+    size: u64,
+    created: u128,
+    modified: u128,
+    last_opened: u128,
+}
+
+/// JSON file for this extension.
+pub(crate) const PLUGIN_JSON_FILE: &str = r#"
+{
+  "id": "Applications",
+  "platforms": ["macos", "linux", "windows"],
+  "name": "Applications",
+  "description": "Application search",
+  "icon": "font_Application",
+  "type": "group",
+  "enabled": true
+}
+"#;

src-tauri/src/extension/built_in/application/without_feature.rs

@@ -0,0 +1,128 @@
+use super::super::Extension;
+use super::AppMetadata;
+use crate::common::error::SearchError;
+use crate::common::search::{QueryResponse, QuerySource, SearchQuery};
+use crate::common::traits::SearchSource;
+use crate::extension::LOCAL_QUERY_SOURCE_TYPE;
+use async_trait::async_trait;
+use tauri::AppHandle;
+
+pub(crate) const QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME: &str = "Applications";
+
+pub struct ApplicationSearchSource;
+
+impl ApplicationSearchSource {
+    pub async fn prepare_index_and_store(_app_handle: AppHandle) -> Result<(), String> {
+        Ok(())
+    }
+}
+
+#[async_trait]
+impl SearchSource for ApplicationSearchSource {
+    fn get_type(&self) -> QuerySource {
+        QuerySource {
+            r#type: LOCAL_QUERY_SOURCE_TYPE.into(),
+            name: hostname::get()
+                .unwrap_or("My Computer".into())
+                .to_string_lossy()
+                .into(),
+            id: QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME.into(),
+        }
+    }
+
+    async fn search(
+        &self,
+        _tauri_app_handle: AppHandle,
+        _query: SearchQuery,
+    ) -> Result<QueryResponse, SearchError> {
+        Ok(QueryResponse {
+            source: self.get_type(),
+            hits: Vec::new(),
+            total_hits: 0,
+        })
+    }
+}
+
+pub fn set_app_alias(_tauri_app_handle: &AppHandle, _app_path: &str, _alias: &str) {
+    unreachable!("app list should be empty, there is no way this can be invoked")
+}
+
+pub fn register_app_hotkey(
+    _tauri_app_handle: &AppHandle,
+    _app_path: &str,
+    _hotkey: &str,
+) -> Result<(), String> {
+    unreachable!("app list should be empty, there is no way this can be invoked")
+}
+
+pub fn unregister_app_hotkey(_tauri_app_handle: &AppHandle, _app_path: &str) -> Result<(), String> {
+    unreachable!("app list should be empty, there is no way this can be invoked")
+}
+
+pub fn disable_app_search(_tauri_app_handle: &AppHandle, _app_path: &str) -> Result<(), String> {
+    // no-op
+    Ok(())
+}
+
+pub fn enable_app_search(_tauri_app_handle: &AppHandle, _app_path: &str) -> Result<(), String> {
+    // no-op
+    Ok(())
+}
+
+pub fn is_app_search_enabled(_app_path: &str) -> bool {
+    false
+}
+
+#[tauri::command]
+pub async fn add_app_search_path(
+    _tauri_app_handle: AppHandle,
+    _search_path: String,
+) -> Result<(), String> {
+    // no-op
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn remove_app_search_path(
+    _tauri_app_handle: AppHandle,
+    _search_path: String,
+) -> Result<(), String> {
+    // no-op
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn get_app_search_path(_tauri_app_handle: AppHandle) -> Vec<String> {
+    // Return an empty list
+    Vec::new()
+}
+
+#[tauri::command]
+pub async fn get_app_list(_tauri_app_handle: AppHandle) -> Result<Vec<Extension>, String> {
+    // Return an empty list
+    Ok(Vec::new())
+}
+
+#[tauri::command]
+pub async fn get_app_metadata(
+    _tauri_app_handle: AppHandle,
+    _app_path: String,
+) -> Result<AppMetadata, String> {
+    unreachable!("app list should be empty, there is no way this can be invoked")
+}
+
+pub(crate) fn set_apps_hotkey(_tauri_app_handle: &AppHandle) -> Result<(), String> {
+    // no-op
+    Ok(())
+}
+
+pub(crate) fn unset_apps_hotkey(_tauri_app_handle: &AppHandle) -> Result<(), String> {
+    // no-op
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn reindex_applications(_tauri_app_handle: AppHandle) -> Result<(), String> {
+    // no-op
+    Ok(())
+}

src-tauri/src/extension/built_in/calculator.rs

@@ -0,0 +1,199 @@
+use super::super::LOCAL_QUERY_SOURCE_TYPE;
+use crate::common::{
+    document::{DataSourceReference, Document},
+    error::SearchError,
+    search::{QueryResponse, QuerySource, SearchQuery},
+    traits::SearchSource,
+};
+use async_trait::async_trait;
+use chinese_number::{ChineseCase, ChineseCountMethod, ChineseVariant, NumberToChinese};
+use num2words::Num2Words;
+use serde_json::Value;
+use std::collections::HashMap;
+use tauri::AppHandle;
+
+pub(crate) const DATA_SOURCE_ID: &str = "Calculator";
+
+/// JSON file for this extension.
+pub(crate) const PLUGIN_JSON_FILE: &str = r#"
+{
+  "id": "Calculator",
+  "name": "Calculator",
+  "platforms": ["macos", "linux", "windows"],
+  "description": "...",
+  "icon": "font_Calculator",
+  "type": "calculator",
+  "enabled": true
+}
+"#;
+
+pub struct CalculatorSource {
+    base_score: f64,
+}
+
+impl CalculatorSource {
+    pub fn new(base_score: f64) -> Self {
+        CalculatorSource { base_score }
+    }
+}
+
+fn parse_query(query: &str) -> Value {
+    let mut query_json = serde_json::Map::new();
+
+    let operators = ["+", "-", "*", "/", "%"];
+
+    let found_operators: Vec<_> = query
+        .chars()
+        .filter(|c| operators.contains(&c.to_string().as_str()))
+        .collect();
+
+    if found_operators.len() == 1 {
+        let operation = match found_operators[0] {
+            '+' => "sum",
+            '-' => "subtract",
+            '*' => "multiply",
+            '/' => "divide",
+            '%' => "remainder",
+            _ => "expression",
+        };
+
+        query_json.insert("type".to_string(), Value::String(operation.to_string()));
+    } else {
+        query_json.insert("type".to_string(), Value::String("expression".to_string()));
+    }
+
+    query_json.insert("value".to_string(), Value::String(query.to_string()));
+
+    Value::Object(query_json)
+}
+
+fn parse_result(num: f64) -> Value {
+    let mut result_json = serde_json::Map::new();
+
+    let to_zh = num
+        .to_chinese(
+            ChineseVariant::Simple,
+            ChineseCase::Upper,
+            ChineseCountMethod::TenThousand,
+        )
+        .unwrap_or(num.to_string());
+
+    let to_en = Num2Words::new(num)
+        .to_words()
+        .map(|s| {
+            let mut chars = s.chars();
+            let mut result = String::new();
+            let mut capitalize = true;
+
+            while let Some(c) = chars.next() {
+                if c == ' ' || c == '-' {
+                    result.push(c);
+                    capitalize = true;
+                } else if capitalize {
+                    result.extend(c.to_uppercase());
+                    capitalize = false;
+                } else {
+                    result.push(c);
+                }
+            }
+
+            result
+        })
+        .unwrap_or(num.to_string());
+
+    result_json.insert("value".to_string(), Value::String(num.to_string()));
+    result_json.insert("toZh".to_string(), Value::String(to_zh));
+    result_json.insert("toEn".to_string(), Value::String(to_en));
+
+    Value::Object(result_json)
+}
+
+#[async_trait]
+impl SearchSource for CalculatorSource {
+    fn get_type(&self) -> QuerySource {
+        QuerySource {
+            r#type: LOCAL_QUERY_SOURCE_TYPE.into(),
+            name: hostname::get()
+                .unwrap_or(DATA_SOURCE_ID.into())
+                .to_string_lossy()
+                .into(),
+            id: DATA_SOURCE_ID.into(),
+        }
+    }
+
+    async fn search(
+        &self,
+        _tauri_app_handle: AppHandle,
+        query: SearchQuery,
+    ) -> Result<QueryResponse, SearchError> {
+        let Some(query_string) = query.query_strings.get("query") else {
+            return Ok(QueryResponse {
+                source: self.get_type(),
+                hits: Vec::new(),
+                total_hits: 0,
+            });
+        };
+
+        // Trim the leading and tailing whitespace so that our later if condition
+        // will only be evaluated against non-whitespace characters.
+        let query_string = query_string.trim();
+
+        if query_string.is_empty() || query_string.len() == 1 {
+            return Ok(QueryResponse {
+                source: self.get_type(),
+                hits: Vec::new(),
+                total_hits: 0,
+            });
+        }
+
+        let query_string_clone = query_string.to_string();
+        let query_source = self.get_type();
+        let base_score = self.base_score;
+        let closure = move || -> QueryResponse {
+            let res_num = meval::eval_str(&query_string_clone);
+
+            match res_num {
+                Ok(num) => {
+                    let mut payload: HashMap<String, Value> = HashMap::new();
+
+                    let payload_query = parse_query(&query_string_clone);
+                    let payload_result = parse_result(num);
+
+                    payload.insert("query".to_string(), payload_query);
+                    payload.insert("result".to_string(), payload_result);
+
+                    let doc = Document {
+                        id: DATA_SOURCE_ID.to_string(),
+                        category: Some(DATA_SOURCE_ID.to_string()),
+                        payload: Some(payload),
+                        source: Some(DataSourceReference {
+                            r#type: Some(LOCAL_QUERY_SOURCE_TYPE.into()),
+                            name: Some(DATA_SOURCE_ID.into()),
+                            id: Some(DATA_SOURCE_ID.into()),
+                            icon: Some(String::from("font_Calculator")),
+                        }),
+                        ..Default::default()
+                    };
+
+                    QueryResponse {
+                        source: query_source,
+                        hits: vec![(doc, base_score)],
+                        total_hits: 1,
+                    }
+                }
+                Err(_) => QueryResponse {
+                    source: query_source,
+                    hits: Vec::new(),
+                    total_hits: 0,
+                },
+            }
+        };
+
+        let spawn_result = tokio::task::spawn_blocking(closure).await;
+
+        match spawn_result {
+            Ok(response) => Ok(response),
+            Err(e) => std::panic::resume_unwind(e.into_panic()),
+        }
+    }
+}

src-tauri/src/extension/built_in/file_search/config.rs

@@ -0,0 +1,209 @@
+//! File Search configuration entries definition and getter/setter functions.
+
+use serde::Deserialize;
+use serde::Serialize;
+use serde_json::Value;
+use std::sync::LazyLock;
+use tauri::AppHandle;
+use tauri_plugin_store::StoreExt;
+
+// Tauri store keys for file system configuration
+const TAURI_STORE_FILE_SYSTEM_CONFIG: &str = "file_system_config";
+const TAURI_STORE_KEY_SEARCH_BY: &str = "search_by";
+const TAURI_STORE_KEY_SEARCH_PATHS: &str = "search_paths";
+const TAURI_STORE_KEY_EXCLUDE_PATHS: &str = "exclude_paths";
+const TAURI_STORE_KEY_FILE_TYPES: &str = "file_types";
+
+static HOME_DIR: LazyLock<String> = LazyLock::new(|| {
+    let os_string = dirs::home_dir()
+        .expect("$HOME should be set")
+        .into_os_string();
+    os_string
+        .into_string()
+        .expect("User home directory should be encoded with UTF-8")
+});
+
+#[derive(Debug, Clone, Serialize, Deserialize, Copy)]
+pub enum SearchBy {
+    Name,
+    NameAndContents,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FileSearchConfig {
+    pub search_paths: Vec<String>,
+    pub exclude_paths: Vec<String>,
+    pub file_types: Vec<String>,
+    pub search_by: SearchBy,
+}
+
+impl Default for FileSearchConfig {
+    fn default() -> Self {
+        Self {
+            search_paths: vec![
+                format!("{}/Documents", HOME_DIR.as_str()),
+                format!("{}/Desktop", HOME_DIR.as_str()),
+                format!("{}/Downloads", HOME_DIR.as_str()),
+            ],
+            exclude_paths: Vec::new(),
+            file_types: Vec::new(),
+            search_by: SearchBy::Name,
+        }
+    }
+}
+
+impl FileSearchConfig {
+    pub(crate) fn get(tauri_app_handle: &AppHandle) -> Self {
+        let store = tauri_app_handle
+            .store(TAURI_STORE_FILE_SYSTEM_CONFIG)
+            .unwrap_or_else(|e| {
+                panic!(
+                    "store [{}] not found/loaded, error [{}]",
+                    TAURI_STORE_FILE_SYSTEM_CONFIG, e
+                )
+            });
+
+        // Default value, will be used when specific config entries are not set
+        let default_config = FileSearchConfig::default();
+
+        let search_paths = {
+            if let Some(search_paths) = store.get(TAURI_STORE_KEY_SEARCH_PATHS) {
+                match search_paths {
+                    Value::Array(arr) => {
+                        let mut vec = Vec::with_capacity(arr.len());
+                        for v in arr {
+                            match v {
+                                Value::String(s) => vec.push(s),
+                                other => panic!(
+                                    "Expected all elements of 'search_paths' to be strings, but found: {:?}",
+                                    other
+                                ),
+                            }
+                        }
+                        vec
+                    }
+                    other => panic!(
+                        "Expected 'search_paths' to be an array of strings in the file system config store, but got: {:?}",
+                        other
+                    ),
+                }
+            } else {
+                store.set(
+                    TAURI_STORE_KEY_SEARCH_PATHS,
+                    default_config.search_paths.as_slice(),
+                );
+                default_config.search_paths
+            }
+        };
+
+        let exclude_paths = {
+            if let Some(exclude_paths) = store.get(TAURI_STORE_KEY_EXCLUDE_PATHS) {
+                match exclude_paths {
+                    Value::Array(arr) => {
+                        let mut vec = Vec::with_capacity(arr.len());
+                        for v in arr {
+                            match v {
+                                Value::String(s) => vec.push(s),
+                                other => panic!(
+                                    "Expected all elements of 'exclude_paths' to be strings, but found: {:?}",
+                                    other
+                                ),
+                            }
+                        }
+                        vec
+                    }
+                    other => panic!(
+                        "Expected 'exclude_paths' to be an array of strings in the file system config store, but got: {:?}",
+                        other
+                    ),
+                }
+            } else {
+                store.set(
+                    TAURI_STORE_KEY_EXCLUDE_PATHS,
+                    default_config.exclude_paths.as_slice(),
+                );
+                default_config.exclude_paths
+            }
+        };
+
+        let file_types = {
+            if let Some(file_types) = store.get(TAURI_STORE_KEY_FILE_TYPES) {
+                match file_types {
+                    Value::Array(arr) => {
+                        let mut vec = Vec::with_capacity(arr.len());
+                        for v in arr {
+                            match v {
+                                Value::String(s) => vec.push(s),
+                                other => panic!(
+                                    "Expected all elements of 'file_types' to be strings, but found: {:?}",
+                                    other
+                                ),
+                            }
+                        }
+                        vec
+                    }
+                    other => panic!(
+                        "Expected 'file_types' to be an array of strings in the file system config store, but got: {:?}",
+                        other
+                    ),
+                }
+            } else {
+                store.set(
+                    TAURI_STORE_KEY_FILE_TYPES,
+                    default_config.file_types.as_slice(),
+                );
+                default_config.file_types
+            }
+        };
+
+        let search_by = {
+            if let Some(search_by) = store.get(TAURI_STORE_KEY_SEARCH_BY) {
+                serde_json::from_value(search_by.clone()).unwrap_or_else(|e| {
+                    panic!(
+                        "Failed to deserialize 'search_by' from file system config store. Invalid JSON: {:?}, error: {}",
+                        search_by, e
+                    )
+                })
+            } else {
+                store.set(
+                    TAURI_STORE_KEY_SEARCH_BY,
+                    serde_json::to_value(default_config.search_by).unwrap(),
+                );
+                default_config.search_by
+            }
+        };
+
+        Self {
+            search_by,
+            search_paths,
+            exclude_paths,
+            file_types,
+        }
+    }
+}
+
+// Tauri commands for managing file system configuration
+#[tauri::command]
+pub async fn get_file_system_config(tauri_app_handle: AppHandle) -> FileSearchConfig {
+    FileSearchConfig::get(&tauri_app_handle)
+}
+
+#[tauri::command]
+pub async fn set_file_system_config(
+    tauri_app_handle: AppHandle,
+    config: FileSearchConfig,
+) -> Result<(), String> {
+    let store = tauri_app_handle
+        .store(TAURI_STORE_FILE_SYSTEM_CONFIG)
+        .map_err(|e| e.to_string())?;
+
+    store.set(TAURI_STORE_KEY_SEARCH_PATHS, config.search_paths);
+    store.set(TAURI_STORE_KEY_EXCLUDE_PATHS, config.exclude_paths);
+    store.set(TAURI_STORE_KEY_FILE_TYPES, config.file_types);
+    store.set(
+        TAURI_STORE_KEY_SEARCH_BY,
+        serde_json::to_value(config.search_by).unwrap(),
+    );
+
+    Ok(())
+}

src-tauri/src/extension/built_in/file_search/implementation/macos.rs

@@ -0,0 +1,186 @@
+use super::super::EXTENSION_ID;
+use super::super::config::FileSearchConfig;
+use super::super::config::SearchBy;
+use crate::common::document::{DataSourceReference, Document};
+use crate::extension::LOCAL_QUERY_SOURCE_TYPE;
+use crate::extension::OnOpened;
+use crate::util::file::get_file_icon;
+use futures::stream::Stream;
+use futures::stream::StreamExt;
+use std::os::fd::OwnedFd;
+use std::path::Path;
+use tokio::io::AsyncBufReadExt;
+use tokio::io::BufReader;
+use tokio::process::Child;
+use tokio::process::Command;
+use tokio_stream::wrappers::LinesStream;
+
+/// `mdfind` won't return scores, we use this score for all the documents.
+const SCORE: f64 = 1.0;
+
+pub(crate) async fn hits(
+    query_string: &str,
+    from: usize,
+    size: usize,
+    config: &FileSearchConfig,
+) -> Result<Vec<(Document, f64)>, String> {
+    let (mut iter, mut mdfind_child_process) =
+        execute_mdfind_query(&query_string, from, size, &config)?;
+
+    // Convert results to documents
+    let mut hits: Vec<(Document, f64)> = Vec::new();
+    while let Some(res_file_path) = iter.next().await {
+        let file_path = res_file_path.map_err(|io_err| io_err.to_string())?;
+
+        let icon = get_file_icon(file_path.clone()).await;
+        let file_path_of_type_path = camino::Utf8Path::new(&file_path);
+        let r#where = file_path_of_type_path
+            .parent()
+            .unwrap_or_else(|| {
+                panic!(
+                    "expect path [{}] to have a parent, but it does not",
+                    file_path
+                );
+            })
+            .to_string();
+
+        let file_name = file_path_of_type_path.file_name().unwrap_or_else(|| {
+            panic!(
+                "expect path [{}] to have a file name, but it does not",
+                file_path
+            );
+        });
+        let on_opened = OnOpened::Document {
+            url: file_path.clone(),
+        };
+
+        let doc = Document {
+            id: file_path.clone(),
+            title: Some(file_name.to_string()),
+            source: Some(DataSourceReference {
+                r#type: Some(LOCAL_QUERY_SOURCE_TYPE.into()),
+                name: Some(EXTENSION_ID.into()),
+                id: Some(EXTENSION_ID.into()),
+                icon: Some(String::from("font_Filesearch")),
+            }),
+            category: Some(r#where),
+            on_opened: Some(on_opened),
+            url: Some(file_path),
+            icon: Some(icon.to_string()),
+            ..Default::default()
+        };
+
+        hits.push((doc, SCORE));
+    }
+    // Kill the mdfind process once we get the needed results to prevent zombie
+    // processes.
+    mdfind_child_process
+        .kill()
+        .await
+        .map_err(|e| format!("{:?}", e))?;
+
+    Ok(hits)
+}
+
+/// Return an array containing the `mdfind` command and its arguments.
+fn build_mdfind_query(query_string: &str, config: &FileSearchConfig) -> Vec<String> {
+    let mut args = vec!["mdfind".to_string()];
+
+    match config.search_by {
+        SearchBy::Name => {
+            args.push(format!("kMDItemFSName == '*{}*'", query_string));
+        }
+        SearchBy::NameAndContents => {
+            args.push(format!(
+                "kMDItemFSName == '*{}*' || kMDItemTextContent == '{}'",
+                query_string, query_string
+            ));
+        }
+    }
+
+    // Add search paths using -onlyin
+    for path in &config.search_paths {
+        if Path::new(path).exists() {
+            args.extend_from_slice(&["-onlyin".to_string(), path.to_string()]);
+        }
+    }
+
+    args
+}
+
+/// Spawn the `mdfind` child process and return an async iterator over its output,
+/// allowing us to collect the results asynchronously.
+///
+/// # Return value:
+///
+/// * impl Stream: an async iterator that will yield the matched files
+/// * Child: The handle to the mdfind process, we need to kill it once we
+///   collect all the results to avoid zombie processes.
+fn execute_mdfind_query(
+    query_string: &str,
+    from: usize,
+    size: usize,
+    config: &FileSearchConfig,
+) -> Result<(impl Stream<Item = std::io::Result<String>>, Child), String> {
+    let args = build_mdfind_query(query_string, &config);
+    let (rx, tx) = std::io::pipe().unwrap();
+    let rx_owned = OwnedFd::from(rx);
+    let async_rx = tokio::net::unix::pipe::Receiver::from_owned_fd(rx_owned).unwrap();
+    let buffered_rx = BufReader::new(async_rx);
+    let lines = LinesStream::new(buffered_rx.lines());
+
+    let child = Command::new(&args[0])
+        .args(&args[1..])
+        .stdout(tx)
+        .stderr(std::process::Stdio::null())
+        .spawn()
+        .map_err(|e| format!("Failed to spawn mdfind: {}", e))?;
+    let config_clone = config.clone();
+    let iter = lines
+        .filter(move |res_path| {
+            std::future::ready({
+                match res_path {
+                    Ok(path) => !should_be_filtered_out(&config_clone, path),
+                    Err(_) => {
+                        // Don't filter out Err() values
+                        true
+                    }
+                }
+            })
+        })
+        .skip(from)
+        .take(size);
+
+    Ok((iter, child))
+}
+
+/// If `file_path` should be removed from the search results given the filter
+/// conditions specified in `config`.
+fn should_be_filtered_out(config: &FileSearchConfig, file_path: &str) -> bool {
+    let is_excluded = config
+        .exclude_paths
+        .iter()
+        .any(|exclude_path| file_path.starts_with(exclude_path));
+
+    if is_excluded {
+        return true;
+    }
+
+    let matches_file_type = if config.file_types.is_empty() {
+        true
+    } else {
+        let path_obj = camino::Utf8Path::new(&file_path);
+        if let Some(extension) = path_obj.extension() {
+            config
+                .file_types
+                .iter()
+                .any(|file_type| file_type == extension)
+        } else {
+            // `config.file_types` is not empty, then the search results
+            // should have extensions.
+            false
+        }
+    };
+
+    !matches_file_type
+}

src-tauri/src/extension/built_in/file_search/implementation/mod.rs

@@ -0,0 +1,10 @@
+#[cfg(target_os = "macos")]
+mod macos;
+#[cfg(target_os = "windows")]
+mod windows;
+
+// `hits()` function is platform-specific, export the corresponding impl.
+#[cfg(target_os = "macos")]
+pub(crate) use macos::hits;
+#[cfg(target_os = "windows")]
+pub(crate) use windows::hits;

src-tauri/src/extension/built_in/file_search/implementation/windows.rs

@@ -0,0 +1,751 @@
+//! # Credits
+//!
+//! https://github.com/IRONAGE-Park/rag-sample/blob/3f0ad8c8012026cd3a7e453d08f041609426cb91/src/native/windows.rs
+//! is the starting point of this implementation.
+
+use super::super::EXTENSION_ID;
+use super::super::config::FileSearchConfig;
+use super::super::config::SearchBy;
+use crate::common::document::{DataSourceReference, Document};
+use crate::extension::LOCAL_QUERY_SOURCE_TYPE;
+use crate::extension::OnOpened;
+use crate::util::file::get_file_icon;
+use windows::{
+    Win32::System::{
+        Com::{CLSCTX_INPROC_SERVER, CoCreateInstance},
+        Ole::{OleInitialize, OleUninitialize},
+        Search::{
+            DB_NULL_HCHAPTER, DBACCESSOR_ROWDATA, DBBINDING, DBMEMOWNER_CLIENTOWNED,
+            DBPARAMIO_NOTPARAM, DBPART_VALUE, DBTYPE_WSTR, HACCESSOR, IAccessor, ICommand,
+            ICommandText, IDBCreateCommand, IDBCreateSession, IDBInitialize, IDataInitialize,
+            IRowset, MSDAINITIALIZE,
+        },
+    },
+    core::{GUID, IUnknown, Interface, PWSTR, w},
+};
+
+/// Owned version of `PWSTR` that holds the heap memory.
+///
+/// Use `as_pwstr()` to convert it to a raw pointer.
+struct PwStrOwned(Vec<u16>);
+
+impl PwStrOwned {
+    /// # SAFETY
+    ///
+    /// The returned `PWSTR` is basically a raw pointer, it is only valid within the
+    /// lifetime of `PwStrOwned`.
+    unsafe fn as_pwstr(&mut self) -> PWSTR {
+        let raw_ptr = self.0.as_mut_ptr();
+        PWSTR::from_raw(raw_ptr)
+    }
+}
+
+/// Construct `PwStrOwned` from any `str`.
+impl<S: AsRef<str> + ?Sized> From<&S> for PwStrOwned {
+    fn from(value: &S) -> Self {
+        let mut utf16_bytes = value.as_ref().encode_utf16().collect::<Vec<u16>>();
+        utf16_bytes.push(0); // the tailing NULL
+
+        PwStrOwned(utf16_bytes)
+    }
+}
+
+/// Helper function to replace unsupported characters with whitespace.
+///
+/// Windows search will error out if it encounters these characters.
+///
+/// The complete list of unsupported characters is unknown and we don't know how
+/// to escape them, so let's replace them.
+fn query_string_cleanup(old: &str) -> String {
+    const UNSUPPORTED_CHAR: [char; 2] = ['\'', '\n'];
+
+    // Using len in bytes is ok
+    let mut chars = Vec::with_capacity(old.len());
+    for char in old.chars() {
+        if UNSUPPORTED_CHAR.contains(&char) {
+            chars.push(' ');
+        } else {
+            chars.push(char);
+        }
+    }
+
+    chars.into_iter().collect()
+}
+
+/// Helper function to construct the Windows Search SQL.
+///
+/// Paging is not natively supported by windows Search SQL, it only supports `size`
+/// via the `TOP` keyword ("SELECT TOP {n} {columns}").  The SQL returned by this
+/// function will have `{n}` set to `from + size`, then we will manually implement
+/// paging.
+fn query_sql(query_string: &str, from: usize, size: usize, config: &FileSearchConfig) -> String {
+    let top_n = from
+        .checked_add(size)
+        .expect("[from + size] cannot fit into an [usize]");
+
+    // System.ItemUrl is a column that contains the file path
+    // example: "file:C:/Users/desktop.ini"
+    //
+    // System.Search.Rank is the relevance score
+    let mut sql = format!(
+        "SELECT TOP {} System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE",
+        top_n
+    );
+
+    let query_string = query_string_cleanup(query_string);
+
+    let search_by_predicate = match config.search_by {
+        SearchBy::Name => {
+            // `contains(System.FileName, '{query_string}')` would be faster
+            // because it uses inverted index, but that's not what we want
+            // due to the limitation of tokenization. For example, suppose "Coco AI.rs"
+            // will be tokenized to `["Coco", "AI", "rs"]`, then if users search
+            // via `Co`, this file won't be returned because term `Co` does not
+            // exist in the index.
+            //
+            // So we use wildcard instead even though it is slower.
+            format!("(System.FileName LIKE '%{query_string}%')")
+        }
+        SearchBy::NameAndContents => {
+            // Windows File Search does not support searching by file content.
+            //
+            // `CONTAINS('query_string')` would search all columns for `query_string`,
+            // this is the closest solution we have.
+            format!("((System.FileName LIKE '%{query_string}%') OR CONTAINS('{query_string}'))")
+        }
+    };
+
+    let search_paths_predicate: Option<String> = {
+        if config.search_paths.is_empty() {
+            None
+        } else {
+            let mut output = String::from("(");
+
+            for (idx, search_path) in config.search_paths.iter().enumerate() {
+                if idx != 0 {
+                    output.push_str(" OR ");
+                }
+
+                output.push_str("SCOPE = 'file:");
+                output.push_str(&search_path);
+                output.push('\'');
+            }
+
+            output.push(')');
+
+            Some(output)
+        }
+    };
+
+    let exclude_paths_predicate: Option<String> = {
+        if config.exclude_paths.is_empty() {
+            None
+        } else {
+            let mut output = String::from("(");
+
+            for (idx, exclude_path) in config.exclude_paths.iter().enumerate() {
+                if idx != 0 {
+                    output.push_str(" AND ");
+                }
+
+                output.push_str("(NOT SCOPE = 'file:");
+                output.push_str(&exclude_path);
+                output.push('\'');
+                output.push(')');
+            }
+
+            output.push(')');
+
+            Some(output)
+        }
+    };
+
+    let file_types_predicate: Option<String> = {
+        if config.file_types.is_empty() {
+            None
+        } else {
+            let mut output = String::from("(");
+
+            for (idx, file_type) in config.file_types.iter().enumerate() {
+                if idx != 0 {
+                    output.push_str(" OR ");
+                }
+
+                // NOTE that this column contains a starting dot
+                output.push_str("System.FileExtension = '.");
+                output.push_str(&file_type);
+                output.push('\'');
+            }
+
+            output.push(')');
+
+            Some(output)
+        }
+    };
+
+    sql.push(' ');
+    sql.push_str(search_by_predicate.as_str());
+    if let Some(search_paths_predicate) = search_paths_predicate {
+        sql.push_str(" AND ");
+        sql.push_str(search_paths_predicate.as_str());
+    }
+    if let Some(exclude_paths_predicate) = exclude_paths_predicate {
+        sql.push_str(" AND ");
+        sql.push_str(exclude_paths_predicate.as_str());
+    }
+    if let Some(file_types_predicate) = file_types_predicate {
+        sql.push_str(" AND ");
+        sql.push_str(file_types_predicate.as_str());
+    }
+
+    sql
+}
+
+/// Default GUID for Search.CollatorDSO.1
+const DBGUID_DEFAULT: GUID = GUID {
+    data1: 0xc8b521fb,
+    data2: 0x5cf3,
+    data3: 0x11ce,
+    data4: [0xad, 0xe5, 0x00, 0xaa, 0x00, 0x44, 0x77, 0x3d],
+};
+
+unsafe fn create_accessor_handle(accessor: &IAccessor, index: usize) -> Result<HACCESSOR, String> {
+    let bindings = DBBINDING {
+        iOrdinal: index,
+        obValue: 0,
+        obStatus: 0,
+        obLength: 0,
+        dwPart: DBPART_VALUE.0 as u32,
+        dwMemOwner: DBMEMOWNER_CLIENTOWNED.0 as u32,
+        eParamIO: DBPARAMIO_NOTPARAM.0 as u32,
+        cbMaxLen: 512,
+        dwFlags: 0,
+        wType: DBTYPE_WSTR.0 as u16,
+        bPrecision: 0,
+        bScale: 0,
+        ..Default::default()
+    };
+    let mut status = 0;
+    let mut accessor_handle = HACCESSOR::default();
+    unsafe {
+        accessor
+            .CreateAccessor(
+                DBACCESSOR_ROWDATA.0 as u32,
+                1,
+                &bindings,
+                0,
+                &mut accessor_handle,
+                Some(&mut status),
+            )
+            .map_err(|e| e.to_string())?;
+    }
+
+    Ok(accessor_handle)
+}
+
+fn create_db_initialize() -> Result<IDBInitialize, String> {
+    unsafe {
+        let data_init: IDataInitialize =
+            CoCreateInstance(&MSDAINITIALIZE, None, CLSCTX_INPROC_SERVER)
+                .map_err(|e| e.to_string())?;
+
+        let mut unknown: Option<IUnknown> = None;
+        data_init
+            .GetDataSource(
+                None,
+                CLSCTX_INPROC_SERVER.0,
+                w!("provider=Search.CollatorDSO.1;EXTENDED PROPERTIES=\"Application=Windows\""),
+                &IDBInitialize::IID,
+                &mut unknown as *mut _ as *mut _,
+            )
+            .map_err(|e| e.to_string())?;
+
+        Ok(unknown.unwrap().cast().map_err(|e| e.to_string())?)
+    }
+}
+
+fn create_command(db_init: IDBInitialize) -> Result<ICommandText, String> {
+    unsafe {
+        let db_create_session: IDBCreateSession = db_init.cast().map_err(|e| e.to_string())?;
+        let session: IUnknown = db_create_session
+            .CreateSession(None, &IUnknown::IID)
+            .map_err(|e| e.to_string())?;
+        let db_create_command: IDBCreateCommand = session.cast().map_err(|e| e.to_string())?;
+        Ok(db_create_command
+            .CreateCommand(None, &ICommand::IID)
+            .map_err(|e| e.to_string())?
+            .cast()
+            .map_err(|e| e.to_string())?)
+    }
+}
+
+fn execute_windows_search_sql(sql_query: &str) -> Result<Vec<(String, String)>, String> {
+    unsafe {
+        let mut pwstr_owned_sql = PwStrOwned::from(sql_query);
+        // SAFETY: pwstr_owned_sql will live for the whole lifetime of this function.
+        let sql_query = pwstr_owned_sql.as_pwstr();
+
+        let db_init = create_db_initialize()?;
+        db_init.Initialize().map_err(|e| e.to_string())?;
+        let command = create_command(db_init)?;
+
+        // Set the command text
+        command
+            .SetCommandText(&DBGUID_DEFAULT, sql_query)
+            .map_err(|e| e.to_string())?;
+
+        // Execute the command
+        let mut rowset: Option<IRowset> = None;
+        command
+            .Execute(
+                None,
+                &IRowset::IID,
+                None,
+                None,
+                Some(&mut rowset as *mut _ as *mut _),
+            )
+            .map_err(|e| e.to_string())?;
+        let rowset = rowset.ok_or_else(|| {
+            format!(
+                "No rowset returned for query: {}",
+                // SAFETY: the raw pointer is not dangling
+                sql_query
+                    .to_string()
+                    .expect("the conversion should work as `sql_query` was created from a String",)
+            )
+        })?;
+
+        let accessor: IAccessor = rowset
+            .cast()
+            .map_err(|e| format!("Failed to cast to IAccessor: {}", e.to_string()))?;
+
+        let mut output = Vec::new();
+        let mut count = 0;
+        loop {
+            let mut rows_fetched = 0;
+            let mut row_handles = [std::ptr::null_mut(); 1];
+            let result = rowset.GetNextRows(
+                DB_NULL_HCHAPTER as usize,
+                0,
+                &mut rows_fetched,
+                &mut row_handles,
+            );
+            if result.is_err() {
+                break;
+            }
+            if rows_fetched == 0 {
+                break;
+            }
+
+            let mut data = Vec::new();
+
+            for i in 0..2 {
+                let mut item_name = [0u16; 512];
+
+                let accessor_handle = create_accessor_handle(&accessor, i + 1)?;
+                rowset
+                    .GetData(
+                        *row_handles[0],
+                        accessor_handle,
+                        item_name.as_mut_ptr() as *mut _,
+                    )
+                    .map_err(|e| {
+                        format!(
+                            "Failed to get data at count {}, index {}: {}",
+                            count,
+                            i,
+                            e.to_string()
+                        )
+                    })?;
+                let name = String::from_utf16_lossy(&item_name);
+                // Remove null characters
+                data.push(name.trim_end_matches('\u{0000}').to_string());
+
+                accessor
+                    .ReleaseAccessor(accessor_handle, None)
+                    .map_err(|e| {
+                        format!(
+                            "Failed to release accessor at count {}, index {}: {}",
+                            count,
+                            i,
+                            e.to_string()
+                        )
+                    })?;
+            }
+
+            output.push((data[0].clone(), data[1].clone()));
+
+            count += 1;
+            rowset
+                .ReleaseRows(
+                    1,
+                    row_handles[0],
+                    std::ptr::null_mut(),
+                    std::ptr::null_mut(),
+                    std::ptr::null_mut(),
+                )
+                .map_err(|e| {
+                    format!(
+                        "Failed to release rows at count {}: {}",
+                        count,
+                        e.to_string()
+                    )
+                })?;
+        }
+
+        Ok(output)
+    }
+}
+
+pub(crate) async fn hits(
+    query_string: &str,
+    from: usize,
+    size: usize,
+    config: &FileSearchConfig,
+) -> Result<Vec<(Document, f64)>, String> {
+    let sql = query_sql(query_string, from, size, config);
+    unsafe { OleInitialize(None).map_err(|e| e.to_string())? };
+    let result = execute_windows_search_sql(&sql)?;
+    unsafe { OleUninitialize() };
+    // .take(size) is not needed as `result` will contain `from+size` files at most
+    let result_with_paging = result.into_iter().skip(from);
+    // result_with_paging won't contain more than `size` entries
+    let mut hits = Vec::with_capacity(size);
+
+    const ITEM_URL_PREFIX: &str = "file:";
+    const ITEM_URL_PREFIX_LEN: usize = ITEM_URL_PREFIX.len();
+    for (item_url, score_str) in result_with_paging {
+        // path returned from Windows Search contains a prefix, we need to trim it.
+        //
+        // "file:C:/Users/desktop.ini" => "C:/Users/desktop.ini"
+        let file_path = &item_url[ITEM_URL_PREFIX_LEN..];
+
+        let icon = get_file_icon(file_path.to_string()).await;
+        let file_path_of_type_path = camino::Utf8Path::new(&file_path);
+        let r#where = file_path_of_type_path
+            .parent()
+            .unwrap_or_else(|| {
+                panic!(
+                    "expect path [{}] to have a parent, but it does not",
+                    file_path
+                );
+            })
+            .to_string();
+
+        let file_name = file_path_of_type_path.file_name().unwrap_or_else(|| {
+            panic!(
+                "expect path [{}] to have a file name, but it does not",
+                file_path
+            );
+        });
+        let on_opened = OnOpened::Document {
+            url: file_path.to_string(),
+        };
+
+        let doc = Document {
+            id: file_path.to_string(),
+            title: Some(file_name.to_string()),
+            source: Some(DataSourceReference {
+                r#type: Some(LOCAL_QUERY_SOURCE_TYPE.into()),
+                name: Some(EXTENSION_ID.into()),
+                id: Some(EXTENSION_ID.into()),
+                icon: Some(String::from("font_Filesearch")),
+            }),
+            category: Some(r#where),
+            on_opened: Some(on_opened),
+            url: Some(file_path.into()),
+            icon: Some(icon.to_string()),
+            ..Default::default()
+        };
+
+        let score: f64 = score_str.parse().expect(
+            "System.Search.Rank should be in range [0, 1000], which should be valid for [f64]",
+        );
+
+        hits.push((doc, score));
+    }
+
+    Ok(hits)
+}
+
+// Skip these tests in our CI, they fail with the following error
+// "SQL is invalid: "0x80041820""
+//
+// I have no idea about the underlying root cause
+#[cfg(all(test, not(ci)))]
+mod test_windows_search {
+    use super::*;
+
+    /// Helper function for ensuring `sql` is valid SQL by actually executing it.
+    fn ensure_it_is_valid_sql(sql: &str) {
+        unsafe { OleInitialize(None).unwrap() };
+        execute_windows_search_sql(&sql).expect("SQL is invalid");
+        unsafe { OleUninitialize() };
+    }
+
+    #[test]
+    fn test_query_sql_empty_config_search_by_name() {
+        let config = FileSearchConfig {
+            search_paths: Vec::new(),
+            exclude_paths: Vec::new(),
+            file_types: Vec::new(),
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("coco", 0, 10, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 10 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%coco%')"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_empty_config_search_by_name_and_content() {
+        let config = FileSearchConfig {
+            search_paths: Vec::new(),
+            exclude_paths: Vec::new(),
+            file_types: Vec::new(),
+            search_by: SearchBy::NameAndContents,
+        };
+        let sql = query_sql("coco", 0, 10, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 10 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE ((System.FileName LIKE '%coco%') OR CONTAINS('coco'))"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_with_search_paths() {
+        let config = FileSearchConfig {
+            search_paths: vec!["C:/Users/".into()],
+            exclude_paths: Vec::new(),
+            file_types: Vec::new(),
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("coco", 0, 10, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 10 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%coco%') AND (SCOPE = 'file:C:/Users/')"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_with_multiple_search_paths() {
+        let config = FileSearchConfig {
+            search_paths: vec![
+                "C:/Users/".into(),
+                "D:/Projects/".into(),
+                "E:/Documents/".into(),
+            ],
+            exclude_paths: Vec::new(),
+            file_types: Vec::new(),
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("test", 0, 5, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 5 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%test%') AND (SCOPE = 'file:C:/Users/' OR SCOPE = 'file:D:/Projects/' OR SCOPE = 'file:E:/Documents/')"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_with_exclude_paths() {
+        let config = FileSearchConfig {
+            search_paths: Vec::new(),
+            exclude_paths: vec!["C:/Windows/".into()],
+            file_types: Vec::new(),
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("file", 0, 20, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 20 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%file%') AND ((NOT SCOPE = 'file:C:/Windows/'))"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_with_multiple_exclude_paths() {
+        let config = FileSearchConfig {
+            search_paths: Vec::new(),
+            exclude_paths: vec!["C:/Windows/".into(), "C:/System/".into(), "C:/Temp/".into()],
+            file_types: Vec::new(),
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("data", 5, 15, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 20 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%data%') AND ((NOT SCOPE = 'file:C:/Windows/') AND (NOT SCOPE = 'file:C:/System/') AND (NOT SCOPE = 'file:C:/Temp/'))"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_with_file_types() {
+        let config = FileSearchConfig {
+            search_paths: Vec::new(),
+            exclude_paths: Vec::new(),
+            file_types: vec!["txt".into()],
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("readme", 0, 10, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 10 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%readme%') AND (System.FileExtension = '.txt')"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_with_multiple_file_types() {
+        let config = FileSearchConfig {
+            search_paths: Vec::new(),
+            exclude_paths: Vec::new(),
+            file_types: vec!["rs".into(), "toml".into(), "md".into(), "json".into()],
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("config", 0, 50, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 50 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%config%') AND (System.FileExtension = '.rs' OR System.FileExtension = '.toml' OR System.FileExtension = '.md' OR System.FileExtension = '.json')"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_all_fields_combined() {
+        let config = FileSearchConfig {
+            search_paths: vec!["C:/Projects/".into(), "D:/Code/".into()],
+            exclude_paths: vec!["C:/Projects/temp/".into()],
+            file_types: vec!["rs".into(), "ts".into()],
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("main", 10, 25, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 35 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%main%') AND (SCOPE = 'file:C:/Projects/' OR SCOPE = 'file:D:/Code/') AND ((NOT SCOPE = 'file:C:/Projects/temp/')) AND (System.FileExtension = '.rs' OR System.FileExtension = '.ts')"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_with_special_characters() {
+        let config = FileSearchConfig {
+            search_paths: vec!["C:/Users/John Doe/".into()],
+            exclude_paths: Vec::new(),
+            file_types: vec!["c++".into()],
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("hello-world", 0, 10, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 10 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%hello-world%') AND (SCOPE = 'file:C:/Users/John Doe/') AND (System.FileExtension = '.c++')"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+
+    #[test]
+    fn test_query_sql_edge_case_large_offset() {
+        let config = FileSearchConfig {
+            search_paths: Vec::new(),
+            exclude_paths: Vec::new(),
+            file_types: Vec::new(),
+            search_by: SearchBy::Name,
+        };
+        let sql = query_sql("test", 100, 50, &config);
+
+        assert_eq!(
+            sql,
+            "SELECT TOP 150 System.ItemUrl, System.Search.Rank FROM SystemIndex WHERE (System.FileName LIKE '%test%')"
+        );
+        ensure_it_is_valid_sql(&sql);
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_query_string_cleanup_no_unsupported_chars() {
+        let input = "hello world";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, input);
+    }
+
+    #[test]
+    fn test_query_string_cleanup_single_quote() {
+        let input = "don't worry";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, "don t worry");
+    }
+
+    #[test]
+    fn test_query_string_cleanup_newline() {
+        let input = "line1\nline2";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, "line1 line2");
+    }
+
+    #[test]
+    fn test_query_string_cleanup_both_unsupported_chars() {
+        let input = "don't\nworry";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, "don t worry");
+    }
+
+    #[test]
+    fn test_query_string_cleanup_multiple_single_quotes() {
+        let input = "it's a 'test' string";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, "it s a  test  string");
+    }
+
+    #[test]
+    fn test_query_string_cleanup_multiple_newlines() {
+        let input = "line1\n\nline2\nline3";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, "line1  line2 line3");
+    }
+
+    #[test]
+    fn test_query_string_cleanup_empty_string() {
+        let input = "";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, input);
+    }
+
+    #[test]
+    fn test_query_string_cleanup_only_unsupported_chars() {
+        let input = "'\n'";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, "   ");
+    }
+
+    #[test]
+    fn test_query_string_cleanup_unicode_characters() {
+        let input = "héllo wörld's\nfile";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, "héllo wörld s file");
+    }
+
+    #[test]
+    fn test_query_string_cleanup_special_chars_preserved() {
+        let input = "test@file#name$with%symbols";
+        let result = query_string_cleanup(input);
+        assert_eq!(result, input);
+    }
+}

src-tauri/src/extension/built_in/file_search/mod.rs

@@ -0,0 +1,97 @@
+pub(crate) mod config;
+pub(crate) mod implementation;
+
+use super::super::LOCAL_QUERY_SOURCE_TYPE;
+use crate::common::{
+    error::SearchError,
+    search::{QueryResponse, QuerySource, SearchQuery},
+    traits::SearchSource,
+};
+use async_trait::async_trait;
+use config::FileSearchConfig;
+use hostname;
+use tauri::AppHandle;
+
+pub(crate) const EXTENSION_ID: &str = "File Search";
+
+/// JSON file for this extension.
+pub(crate) const PLUGIN_JSON_FILE: &str = r#"
+{
+  "id": "File Search",
+  "name": "File Search",
+  "platforms": ["macos", "windows"],
+  "description": "Search files on your system",
+  "icon": "font_Filesearch",
+  "type": "extension"
+}
+"#;
+
+pub struct FileSearchExtensionSearchSource;
+
+#[async_trait]
+impl SearchSource for FileSearchExtensionSearchSource {
+    fn get_type(&self) -> QuerySource {
+        QuerySource {
+            r#type: LOCAL_QUERY_SOURCE_TYPE.into(),
+            name: hostname::get()
+                .unwrap_or(EXTENSION_ID.into())
+                .to_string_lossy()
+                .into(),
+            id: EXTENSION_ID.into(),
+        }
+    }
+
+    async fn search(
+        &self,
+        tauri_app_handle: AppHandle,
+        query: SearchQuery,
+    ) -> Result<QueryResponse, SearchError> {
+        let Some(query_string) = query.query_strings.get("query") else {
+            return Ok(QueryResponse {
+                source: self.get_type(),
+                hits: Vec::new(),
+                total_hits: 0,
+            });
+        };
+        let from = usize::try_from(query.from).expect("from too big");
+        let size = usize::try_from(query.size).expect("size too big");
+
+        let query_string = query_string.trim();
+        if query_string.is_empty() {
+            return Ok(QueryResponse {
+                source: self.get_type(),
+                hits: Vec::new(),
+                total_hits: 0,
+            });
+        }
+
+        // Get configuration from tauri store
+        let config = FileSearchConfig::get(&tauri_app_handle);
+
+        // If search paths are empty, then the hit should be empty.
+        //
+        // Without this, empty search paths will result in a mdfind that has no `-onlyin`
+        // option, which will in turn query the whole disk volume.
+        if config.search_paths.is_empty() {
+            return Ok(QueryResponse {
+                source: self.get_type(),
+                hits: Vec::new(),
+                total_hits: 0,
+            });
+        }
+
+        // Execute search in a blocking task
+        let query_source = self.get_type();
+
+        let hits = implementation::hits(&query_string, from, size, &config)
+            .await
+            .map_err(SearchError::InternalError)?;
+
+        let total_hits = hits.len();
+        Ok(QueryResponse {
+            source: query_source,
+            hits,
+            total_hits,
+        })
+    }
+}

src-tauri/src/extension/built_in/mod.rs

@@ -0,0 +1,541 @@
+//! Built-in extensions and related stuff.
+
+pub mod ai_overview;
+pub mod application;
+pub mod calculator;
+#[cfg(any(target_os = "macos", target_os = "windows"))]
+pub mod file_search;
+pub mod pizza_engine_runtime;
+pub mod quick_ai_access;
+
+use super::Extension;
+use crate::SearchSourceRegistry;
+use crate::extension::built_in::application::{set_apps_hotkey, unset_apps_hotkey};
+use crate::extension::{
+    ExtensionBundleIdBorrowed, PLUGIN_JSON_FILE_NAME, alter_extension_json_file,
+};
+use anyhow::Context;
+use std::path::{Path, PathBuf};
+use tauri::{AppHandle, Manager};
+
+pub(crate) fn get_built_in_extension_directory(tauri_app_handle: &AppHandle) -> PathBuf {
+    let mut resource_dir = tauri_app_handle.path().app_data_dir().expect(
+        "User home directory not found, which should be impossible on desktop environments",
+    );
+    resource_dir.push("built_in_extensions");
+
+    resource_dir
+}
+
+/// Helper function to load the built-in extension specified by `extension_id`, used
+/// in `list_built_in_extensions()`.
+///
+/// For built-in extensions, users are only allowed to edit these fields:
+///
+///   1. alias (if this extension supports alias)
+///   2. hotkey (if this extension supports hotkey)
+///   3. enabled
+///
+/// If
+///
+///   1. The above fields have invalid value
+///   2. Other fields are modified
+///
+/// we ignore and reset them to the default value.
+async fn load_built_in_extension(
+    built_in_extensions_dir: &Path,
+    extension_id: &str,
+    default_plugin_json_file: &str,
+) -> Result<Extension, String> {
+    let mut extension_dir = built_in_extensions_dir.join(extension_id);
+    let mut default_plugin_json = serde_json::from_str::<Extension>(&default_plugin_json_file).unwrap_or_else( |e| {
+          panic!("the default extension {} file of built-in extension [{}] cannot be parsed as a valid [struct Extension], error [{}]", PLUGIN_JSON_FILE_NAME, extension_id, e);
+        });
+
+    if !extension_dir.try_exists().map_err(|e| e.to_string())? {
+        tokio::fs::create_dir_all(extension_dir.as_path())
+            .await
+            .map_err(|e| e.to_string())?;
+    }
+
+    let plugin_json_file_path = {
+        extension_dir.push(PLUGIN_JSON_FILE_NAME);
+        extension_dir
+    };
+
+    // If the JSON file does not exist, create a file with the default template and return.
+    if !plugin_json_file_path
+        .try_exists()
+        .map_err(|e| e.to_string())?
+    {
+        tokio::fs::write(plugin_json_file_path, default_plugin_json_file)
+            .await
+            .map_err(|e| e.to_string())?;
+
+        return Ok(default_plugin_json);
+    }
+
+    let plugin_json_file_content = tokio::fs::read_to_string(plugin_json_file_path.as_path())
+        .await
+        .map_err(|e| e.to_string())?;
+    let res_plugin_json = serde_json::from_str::<Extension>(&plugin_json_file_content);
+    let Ok(plugin_json) = res_plugin_json else {
+        log::warn!(
+            "user invalidated built-in extension [{}] file, overwriting it with the default template",
+            extension_id
+        );
+
+        // If the JSON file cannot be parsed as `struct Extension`, overwrite it with the default template and return.
+        tokio::fs::write(plugin_json_file_path, default_plugin_json_file)
+            .await
+            .map_err(|e| e.to_string())?;
+
+        return Ok(default_plugin_json);
+    };
+
+    // Users are only allowed to edit the below fields
+    //   1. alias (if this extension supports alias)
+    //   2. hotkey (if this extension supports hotkey)
+    //   3. enabled
+    // so we ignore all other fields.
+    let alias = if default_plugin_json.supports_alias_hotkey() {
+        plugin_json.alias.clone()
+    } else {
+        None
+    };
+    let hotkey = if default_plugin_json.supports_alias_hotkey() {
+        plugin_json.hotkey.clone()
+    } else {
+        None
+    };
+
+    let enabled = plugin_json.enabled;
+
+    default_plugin_json.alias = alias;
+    default_plugin_json.hotkey = hotkey;
+    default_plugin_json.enabled = enabled;
+
+    let final_plugin_json_file_content = serde_json::to_string_pretty(&default_plugin_json)
+        .expect("failed to serialize `struct Extension`");
+    tokio::fs::write(plugin_json_file_path, final_plugin_json_file_content)
+        .await
+        .map_err(|e| e.to_string())?;
+
+    Ok(default_plugin_json)
+}
+
+/// Return the built-in extension list.
+///
+/// Will create extension files when they are not found.
+///
+/// Users may put extension files in the built-in extension directory, but
+/// we do not care and will ignore them.
+///
+/// We only read alias/hotkey/enabled from the JSON file, we have ensured that if
+/// alias/hotkey is not supported, then it will be `None`. Besides that, no further
+/// validation is needed because nothing could go wrong.
+pub(crate) async fn list_built_in_extensions(
+    tauri_app_handle: &AppHandle,
+) -> Result<Vec<Extension>, String> {
+    let dir = get_built_in_extension_directory(tauri_app_handle);
+
+    let mut built_in_extensions = Vec::new();
+    built_in_extensions.push(
+        load_built_in_extension(
+            &dir,
+            application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME,
+            application::PLUGIN_JSON_FILE,
+        )
+        .await?,
+    );
+    built_in_extensions.push(
+        load_built_in_extension(
+            &dir,
+            calculator::DATA_SOURCE_ID,
+            calculator::PLUGIN_JSON_FILE,
+        )
+        .await?,
+    );
+    built_in_extensions.push(
+        load_built_in_extension(
+            &dir,
+            ai_overview::EXTENSION_ID,
+            ai_overview::PLUGIN_JSON_FILE,
+        )
+        .await?,
+    );
+    built_in_extensions.push(
+        load_built_in_extension(
+            &dir,
+            quick_ai_access::EXTENSION_ID,
+            quick_ai_access::PLUGIN_JSON_FILE,
+        )
+        .await?,
+    );
+
+    cfg_if::cfg_if! {
+        if #[cfg(any(target_os = "macos", target_os = "windows"))] {
+            built_in_extensions.push(
+                load_built_in_extension(
+                    &dir,
+                    file_search::EXTENSION_ID,
+                    file_search::PLUGIN_JSON_FILE,
+                )
+                .await?,
+            );
+        }
+    }
+
+    Ok(built_in_extensions)
+}
+
+pub(super) async fn init_built_in_extension(
+    tauri_app_handle: &AppHandle,
+    extension: &Extension,
+    search_source_registry: &SearchSourceRegistry,
+) -> Result<(), String> {
+    log::trace!("initializing built-in extensions [{}]", extension.id);
+
+    if extension.id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME {
+        search_source_registry
+            .register_source(application::ApplicationSearchSource)
+            .await;
+        set_apps_hotkey(&tauri_app_handle)?;
+        log::debug!("built-in extension [{}] initialized", extension.id);
+    }
+
+    if extension.id == calculator::DATA_SOURCE_ID {
+        let calculator_search = calculator::CalculatorSource::new(2000f64);
+        search_source_registry
+            .register_source(calculator_search)
+            .await;
+        log::debug!("built-in extension [{}] initialized", extension.id);
+    }
+
+    cfg_if::cfg_if! {
+        if #[cfg(any(target_os = "macos", target_os = "windows"))] {
+            if extension.id == file_search::EXTENSION_ID {
+                let file_system_search = file_search::FileSearchExtensionSearchSource;
+                search_source_registry
+                    .register_source(file_system_search)
+                    .await;
+                log::debug!("built-in extension [{}] initialized", extension.id);
+            }
+        }
+    }
+
+    Ok(())
+}
+
+pub(crate) fn is_extension_built_in(bundle_id: &ExtensionBundleIdBorrowed<'_>) -> bool {
+    bundle_id.developer.is_none()
+}
+
+pub(crate) async fn enable_built_in_extension(
+    tauri_app_handle: &AppHandle,
+    bundle_id: &ExtensionBundleIdBorrowed<'_>,
+) -> Result<(), String> {
+    let search_source_registry_tauri_state = tauri_app_handle.state::<SearchSourceRegistry>();
+
+    let update_extension = |extension: &mut Extension| -> Result<(), String> {
+        extension.enabled = true;
+        Ok(())
+    };
+
+    if bundle_id.extension_id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME
+        && bundle_id.sub_extension_id.is_none()
+    {
+        search_source_registry_tauri_state
+            .register_source(application::ApplicationSearchSource)
+            .await;
+        set_apps_hotkey(tauri_app_handle)?;
+
+        alter_extension_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id,
+            update_extension,
+        )?;
+
+        return Ok(());
+    }
+
+    // Check if this is an application
+    if bundle_id.extension_id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME
+        && bundle_id.sub_extension_id.is_some()
+    {
+        let app_path = bundle_id.sub_extension_id.expect("just checked it is Some");
+        application::enable_app_search(tauri_app_handle, app_path)?;
+        return Ok(());
+    }
+
+    if bundle_id.extension_id == calculator::DATA_SOURCE_ID {
+        let calculator_search = calculator::CalculatorSource::new(2000f64);
+        search_source_registry_tauri_state
+            .register_source(calculator_search)
+            .await;
+        alter_extension_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id,
+            update_extension,
+        )?;
+        return Ok(());
+    }
+
+    if bundle_id.extension_id == quick_ai_access::EXTENSION_ID {
+        alter_extension_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id,
+            update_extension,
+        )?;
+        return Ok(());
+    }
+
+    if bundle_id.extension_id == ai_overview::EXTENSION_ID {
+        alter_extension_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id,
+            update_extension,
+        )?;
+        return Ok(());
+    }
+
+    cfg_if::cfg_if! {
+        if #[cfg(any(target_os = "macos", target_os = "windows"))] {
+            if bundle_id.extension_id == file_search::EXTENSION_ID {
+            let file_system_search = file_search::FileSearchExtensionSearchSource;
+            search_source_registry_tauri_state
+                .register_source(file_system_search)
+                .await;
+            alter_extension_json_file(
+                &get_built_in_extension_directory(tauri_app_handle),
+                bundle_id,
+                update_extension,
+            )?;
+            return Ok(());
+            }
+        }
+    }
+
+    Ok(())
+}
+
+pub(crate) async fn disable_built_in_extension(
+    tauri_app_handle: &AppHandle,
+    bundle_id: &ExtensionBundleIdBorrowed<'_>,
+) -> Result<(), String> {
+    let search_source_registry_tauri_state = tauri_app_handle.state::<SearchSourceRegistry>();
+
+    let update_extension = |extension: &mut Extension| -> Result<(), String> {
+        extension.enabled = false;
+        Ok(())
+    };
+
+    if bundle_id.extension_id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME
+        && bundle_id.sub_extension_id.is_none()
+    {
+        search_source_registry_tauri_state
+            .remove_source(bundle_id.extension_id)
+            .await;
+        unset_apps_hotkey(tauri_app_handle)?;
+
+        alter_extension_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id,
+            update_extension,
+        )?;
+        return Ok(());
+    }
+
+    // Check if this is an application
+    if bundle_id.extension_id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME
+        && bundle_id.sub_extension_id.is_some()
+    {
+        let app_path = bundle_id.sub_extension_id.expect("just checked it is Some");
+        application::disable_app_search(tauri_app_handle, app_path)?;
+        return Ok(());
+    }
+
+    if bundle_id.extension_id == calculator::DATA_SOURCE_ID {
+        search_source_registry_tauri_state
+            .remove_source(bundle_id.extension_id)
+            .await;
+        alter_extension_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id,
+            update_extension,
+        )?;
+        return Ok(());
+    }
+
+    if bundle_id.extension_id == quick_ai_access::EXTENSION_ID {
+        alter_extension_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id,
+            update_extension,
+        )?;
+
+        return Ok(());
+    }
+
+    if bundle_id.extension_id == ai_overview::EXTENSION_ID {
+        alter_extension_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id,
+            update_extension,
+        )?;
+
+        return Ok(());
+    }
+
+    cfg_if::cfg_if! {
+        if #[cfg(any(target_os = "macos", target_os = "windows"))] {
+            if bundle_id.extension_id == file_search::EXTENSION_ID {
+                search_source_registry_tauri_state
+                    .remove_source(bundle_id.extension_id)
+                    .await;
+                alter_extension_json_file(
+                    &get_built_in_extension_directory(tauri_app_handle),
+                    bundle_id,
+                    update_extension,
+                )?;
+                return Ok(());
+            }
+        }
+    }
+
+    Ok(())
+}
+
+pub(crate) fn set_built_in_extension_alias(
+    tauri_app_handle: &AppHandle,
+    bundle_id: &ExtensionBundleIdBorrowed<'_>,
+    alias: &str,
+) {
+    if bundle_id.extension_id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME {
+        if let Some(app_path) = bundle_id.sub_extension_id {
+            application::set_app_alias(tauri_app_handle, app_path, alias);
+        }
+    }
+}
+
+pub(crate) fn register_built_in_extension_hotkey(
+    tauri_app_handle: &AppHandle,
+    bundle_id: &ExtensionBundleIdBorrowed<'_>,
+    hotkey: &str,
+) -> Result<(), String> {
+    if bundle_id.extension_id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME {
+        if let Some(app_path) = bundle_id.sub_extension_id {
+            application::register_app_hotkey(&tauri_app_handle, app_path, hotkey)?;
+        }
+    }
+    Ok(())
+}
+
+pub(crate) fn unregister_built_in_extension_hotkey(
+    tauri_app_handle: &AppHandle,
+    bundle_id: &ExtensionBundleIdBorrowed<'_>,
+) -> Result<(), String> {
+    if bundle_id.extension_id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME {
+        if let Some(app_path) = bundle_id.sub_extension_id {
+            application::unregister_app_hotkey(&tauri_app_handle, app_path)?;
+        }
+    }
+    Ok(())
+}
+
+fn split_extension_id(extension_id: &str) -> (&str, Option<&str>) {
+    match extension_id.find('.') {
+        Some(idx) => (&extension_id[..idx], Some(&extension_id[idx + 1..])),
+        None => (extension_id, None),
+    }
+}
+
+fn load_extension_from_json_file(
+    extension_directory: &Path,
+    extension_id: &str,
+) -> Result<Extension, String> {
+    let (parent_extension_id, _opt_sub_extension_id) = split_extension_id(extension_id);
+    let json_file_path = {
+        let mut extension_directory_path = extension_directory.join(parent_extension_id);
+        extension_directory_path.push(PLUGIN_JSON_FILE_NAME);
+
+        extension_directory_path
+    };
+
+    let mut extension = serde_json::from_reader::<_, Extension>(
+        std::fs::File::open(&json_file_path)
+            .with_context(|| {
+                format!(
+                    "the [{}] file for extension [{}] is missing or broken",
+                    PLUGIN_JSON_FILE_NAME, parent_extension_id
+                )
+            })
+            .map_err(|e| e.to_string())?,
+    )
+    .map_err(|e| e.to_string())?;
+
+    super::canonicalize_relative_icon_path(extension_directory, &mut extension)?;
+
+    Ok(extension)
+}
+
+pub(crate) async fn is_built_in_extension_enabled(
+    tauri_app_handle: &AppHandle,
+    bundle_id: &ExtensionBundleIdBorrowed<'_>,
+) -> Result<bool, String> {
+    let search_source_registry_tauri_state = tauri_app_handle.state::<SearchSourceRegistry>();
+
+    if bundle_id.extension_id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME
+        && bundle_id.sub_extension_id.is_none()
+    {
+        return Ok(search_source_registry_tauri_state
+            .get_source(bundle_id.extension_id)
+            .await
+            .is_some());
+    }
+
+    // Check if this is an application
+    if bundle_id.extension_id == application::QUERYSOURCE_ID_DATASOURCE_ID_DATASOURCE_NAME {
+        if let Some(app_path) = bundle_id.sub_extension_id {
+            return Ok(application::is_app_search_enabled(app_path));
+        }
+    }
+
+    if bundle_id.extension_id == calculator::DATA_SOURCE_ID {
+        return Ok(search_source_registry_tauri_state
+            .get_source(bundle_id.extension_id)
+            .await
+            .is_some());
+    }
+
+    if bundle_id.extension_id == quick_ai_access::EXTENSION_ID {
+        let extension = load_extension_from_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id.extension_id,
+        )?;
+        return Ok(extension.enabled);
+    }
+
+    if bundle_id.extension_id == ai_overview::EXTENSION_ID {
+        let extension = load_extension_from_json_file(
+            &get_built_in_extension_directory(tauri_app_handle),
+            bundle_id.extension_id,
+        )?;
+        return Ok(extension.enabled);
+    }
+
+    cfg_if::cfg_if! {
+        if #[cfg(any(target_os = "macos", target_os = "windows"))] {
+            if bundle_id.extension_id == file_search::EXTENSION_ID
+                && bundle_id.sub_extension_id.is_none()
+            {
+                return Ok(search_source_registry_tauri_state
+                    .get_source(bundle_id.extension_id)
+                    .await
+                    .is_some());
+            }
+        }
+    }
+
+    unreachable!("extension [{:?}] is not a built-in extension", bundle_id)
+}

src-tauri/src/extension/built_in/pizza_engine_runtime.rs

@@ -0,0 +1,76 @@
+//! We use Pizza Engine to index applications and local files. The engine will be
+//! run in the thread/runtime defined in this file.
+//!
+//! # Why such a thread/runtime is needed
+//!
+//! Generally, Tokio async runtime requires all the async tasks running on it to be
+//! `Send` and `Sync`, but the async tasks created by Pizza Engine are not,
+//! which forces us to create a dedicated thread/runtime to execute them.
+
+use std::any::Any;
+use std::collections::HashMap;
+use std::collections::hash_map::Entry;
+use std::sync::OnceLock;
+
+pub(crate) trait SearchSourceState {
+    #[cfg_attr(not(feature = "use_pizza_engine"), allow(unused))]
+    fn as_mut_any(&mut self) -> &mut dyn Any;
+}
+
+#[async_trait::async_trait(?Send)]
+pub(crate) trait Task: Send + Sync {
+    fn search_source_id(&self) -> &'static str;
+
+    async fn exec(&mut self, state: &mut Option<Box<dyn SearchSourceState>>);
+}
+
+pub(crate) static RUNTIME_TX: OnceLock<tokio::sync::mpsc::UnboundedSender<Box<dyn Task>>> =
+    OnceLock::new();
+
+/// This function blocks until the runtime thread is ready for accepting tasks.
+pub(crate) async fn start_pizza_engine_runtime() {
+    const THREAD_NAME: &str = "Pizza engine runtime thread";
+
+    log::trace!("starting Pizza engine runtime");
+    let (engine_start_signal_tx, engine_start_signal_rx) = tokio::sync::oneshot::channel();
+
+    std::thread::Builder::new()
+        .name(THREAD_NAME.into())
+        .spawn(move || {
+            let rt = tokio::runtime::Runtime::new().unwrap();
+
+            let main = async {
+                let mut states: HashMap<String, Option<Box<dyn SearchSourceState>>> =
+                    HashMap::new();
+
+                let (tx, mut rx) = tokio::sync::mpsc::unbounded_channel();
+                RUNTIME_TX.set(tx).unwrap();
+
+                engine_start_signal_tx
+                    .send(())
+                    .expect("engine_start_signal_rx dropped");
+
+                while let Some(mut task) = rx.recv().await {
+                    let opt_search_source_state = match states.entry(task.search_source_id().into())
+                    {
+                        Entry::Occupied(o) => o.into_mut(),
+                        Entry::Vacant(v) => v.insert(None),
+                    };
+                    task.exec(opt_search_source_state).await;
+                }
+            };
+
+            rt.block_on(main);
+        })
+        .unwrap_or_else(|e| {
+            panic!(
+                "failed to start thread [{}] due to error [{}]",
+                THREAD_NAME, e
+            );
+        });
+
+    engine_start_signal_rx
+        .await
+        .expect("engine_start_signal_tx dropped, the runtime thread could be dead");
+    log::trace!("Pizza engine runtime started");
+}

src-tauri/src/extension/built_in/quick_ai_access.rs

@@ -0,0 +1,12 @@
+pub(super) const EXTENSION_ID: &str = "QuickAIAccess";
+
+pub(crate) const PLUGIN_JSON_FILE: &str = r#"
+{
+  "id": "QuickAIAccess",
+  "name": "Quick AI Access",
+  "description": "...",
+  "icon": "font_a-QuickAIAccess",
+  "type": "ai_extension",
+  "enabled": true
+}
+"#;

src-tauri/src/extension/third_party/check.rs

@@ -0,0 +1,729 @@
+//! Coco has 4 sources of `plugin.json` to check and validate:
+//!
+//! 1. From coco-extensions repository
+//!   
+//!    Granted, Coco APP won't check these files directly, but the code here
+//!    will run in that repository's CI to prevent errors in the first place.
+//!
+//! 2. From the "<data directory>/third_party_extensions" directory
+//! 3. Imported via "Import Local Extension"
+//! 4. Downloaded from the "store/extension/<extension ID>/_download" API
+//!
+//! This file contains the checks that are general enough to be applied to all
+//! these 4 sources
+
+use crate::extension::Extension;
+use crate::extension::ExtensionType;
+use crate::util::platform::Platform;
+use std::collections::HashSet;
+
+pub(crate) fn general_check(extension: &Extension) -> Result<(), String> {
+    // Check main extension
+    check_main_extension_only(extension)?;
+    check_main_extension_or_sub_extension(extension, &format!("extension [{}]", extension.id))?;
+
+    // `None` if `extension` is compatible with all the platforms. Otherwise `Some(limited_platforms)`
+    let limited_supported_platforms = match extension.platforms.as_ref() {
+        Some(platforms) => {
+            if platforms.len() == Platform::num_of_supported_platforms() {
+                None
+            } else {
+                Some(platforms)
+            }
+        }
+        None => None,
+    };
+
+    // Check sub extensions
+    let commands = match extension.commands {
+        Some(ref v) => v.as_slice(),
+        None => &[],
+    };
+    let scripts = match extension.scripts {
+        Some(ref v) => v.as_slice(),
+        None => &[],
+    };
+    let quicklinks = match extension.quicklinks {
+        Some(ref v) => v.as_slice(),
+        None => &[],
+    };
+    let sub_extensions = [commands, scripts, quicklinks].concat();
+    let mut sub_extension_ids = HashSet::new();
+
+    for sub_extension in sub_extensions.iter() {
+        check_sub_extension_only(&extension.id, sub_extension, limited_supported_platforms)?;
+        check_main_extension_or_sub_extension(
+            extension,
+            &format!("sub-extension [{}-{}]", extension.id, sub_extension.id),
+        )?;
+
+        if !sub_extension_ids.insert(sub_extension.id.as_str()) {
+            // extension ID already exists
+            return Err(format!(
+                "sub-extension with ID [{}] already exists",
+                sub_extension.id
+            ));
+        }
+    }
+
+    Ok(())
+}
+
+/// This checks the main extension only, it won't check sub-extensions.
+fn check_main_extension_only(extension: &Extension) -> Result<(), String> {
+    // Group and Extension cannot have alias
+    if extension.alias.is_some() {
+        if extension.r#type == ExtensionType::Group || extension.r#type == ExtensionType::Extension
+        {
+            return Err(format!(
+                "invalid extension [{}], extension of type [{:?}] cannot have alias",
+                extension.id, extension.r#type
+            ));
+        }
+    }
+
+    // Group and Extension cannot have hotkey
+    if extension.hotkey.is_some() {
+        if extension.r#type == ExtensionType::Group || extension.r#type == ExtensionType::Extension
+        {
+            return Err(format!(
+                "invalid extension [{}], extension of type [{:?}] cannot have hotkey",
+                extension.id, extension.r#type
+            ));
+        }
+    }
+
+    if extension.commands.is_some() || extension.scripts.is_some() || extension.quicklinks.is_some()
+    {
+        if extension.r#type != ExtensionType::Group && extension.r#type != ExtensionType::Extension
+        {
+            return Err(format!(
+                "invalid extension [{}], only extension of type [Group] and [Extension] can have sub-extensions",
+                extension.id,
+            ));
+        }
+    }
+
+    if extension.settings.is_some() {
+        // Sub-extensions are all searchable, so this check is only for main extensions.
+        if !extension.searchable() {
+            return Err(format!(
+                "invalid extension {}, field [settings] is currently only allowed in searchable extension, this type of extension is not searchable [{}]",
+                extension.id, extension.r#type
+            ));
+        }
+    }
+
+    Ok(())
+}
+
+fn check_sub_extension_only(
+    extension_id: &str,
+    sub_extension: &Extension,
+    limited_platforms: Option<&HashSet<Platform>>,
+) -> Result<(), String> {
+    if sub_extension.r#type == ExtensionType::Group
+        || sub_extension.r#type == ExtensionType::Extension
+    {
+        return Err(format!(
+            "invalid sub-extension [{}-{}]: sub-extensions should not be of type [Group] or [Extension]",
+            extension_id, sub_extension.id
+        ));
+    }
+
+    if sub_extension.commands.is_some()
+        || sub_extension.scripts.is_some()
+        || sub_extension.quicklinks.is_some()
+    {
+        return Err(format!(
+            "invalid sub-extension [{}-{}]: fields [commands/scripts/quicklinks] should not be set in sub-extensions",
+            extension_id, sub_extension.id
+        ));
+    }
+
+    if sub_extension.developer.is_some() {
+        return Err(format!(
+            "invalid sub-extension [{}-{}]: field [developer] should not be set in sub-extensions",
+            extension_id, sub_extension.id
+        ));
+    }
+
+    if let Some(platforms_supported_by_main_extension) = limited_platforms {
+        match sub_extension.platforms {
+            Some(ref platforms_supported_by_sub_extension) => {
+                let diff = platforms_supported_by_sub_extension
+                    .difference(&platforms_supported_by_main_extension)
+                    .into_iter()
+                    .map(|p| p.to_string())
+                    .collect::<Vec<String>>();
+
+                if !diff.is_empty() {
+                    return Err(format!(
+                        "invalid sub-extension [{}-{}]: it supports platforms {:?} that are not supported by the main extension",
+                        extension_id, sub_extension.id, diff
+                    ));
+                }
+            }
+            None => {
+                // if `sub_extension.platform` is None, it means it has the same value
+                // as main extension's `platforms` field, so we don't need to check it.
+            }
+        }
+    }
+
+    Ok(())
+}
+
+fn check_main_extension_or_sub_extension(
+    extension: &Extension,
+    identifier: &str,
+) -> Result<(), String> {
+    // If field `action` is Some, then it should be a Command
+    if extension.action.is_some() && extension.r#type != ExtensionType::Command {
+        return Err(format!(
+            "invalid {}, field [action] is set for a non-Command extension",
+            identifier
+        ));
+    }
+
+    if extension.r#type == ExtensionType::Command && extension.action.is_none() {
+        return Err(format!(
+            "invalid {}, field [action] should be set for a Command extension",
+            identifier
+        ));
+    }
+
+    // If field `quicklink` is Some, then it should be a Quicklink
+    if extension.quicklink.is_some() && extension.r#type != ExtensionType::Quicklink {
+        return Err(format!(
+            "invalid {}, field [quicklink] is set for a non-Quicklink extension",
+            identifier
+        ));
+    }
+
+    if extension.r#type == ExtensionType::Quicklink && extension.quicklink.is_none() {
+        return Err(format!(
+            "invalid {}, field [quicklink] should be set for a Quicklink extension",
+            identifier
+        ));
+    }
+
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::extension::{
+        CommandAction, ExtensionSettings, Quicklink, QuicklinkLink, QuicklinkLinkComponent,
+    };
+
+    /// Helper function to create a basic valid extension
+    fn create_basic_extension(id: &str, extension_type: ExtensionType) -> Extension {
+        Extension {
+            id: id.to_string(),
+            name: "Test Extension".to_string(),
+            developer: None,
+            platforms: None,
+            description: "Test description".to_string(),
+            icon: "test-icon.png".to_string(),
+            r#type: extension_type,
+            action: None,
+            quicklink: None,
+            commands: None,
+            scripts: None,
+            quicklinks: None,
+            alias: None,
+            hotkey: None,
+            enabled: true,
+            settings: None,
+            screenshots: None,
+            url: None,
+            version: None,
+        }
+    }
+
+    /// Helper function to create a command action
+    fn create_command_action() -> CommandAction {
+        CommandAction {
+            exec: "echo".to_string(),
+            args: Some(vec!["test".to_string()]),
+        }
+    }
+
+    /// Helper function to create a quicklink
+    fn create_quicklink() -> Quicklink {
+        Quicklink {
+            link: QuicklinkLink {
+                components: vec![QuicklinkLinkComponent::StaticStr(
+                    "https://example.com".to_string(),
+                )],
+            },
+            open_with: None,
+        }
+    }
+
+    /* test_check_main_extension_only */
+    #[test]
+    fn test_group_cannot_have_alias() {
+        let mut extension = create_basic_extension("test-group", ExtensionType::Group);
+        extension.alias = Some("group-alias".to_string());
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(result.unwrap_err().contains("cannot have alias"));
+    }
+
+    #[test]
+    fn test_extension_cannot_have_alias() {
+        let mut extension = create_basic_extension("test-ext", ExtensionType::Extension);
+        extension.alias = Some("ext-alias".to_string());
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(result.unwrap_err().contains("cannot have alias"));
+    }
+
+    #[test]
+    fn test_group_cannot_have_hotkey() {
+        let mut extension = create_basic_extension("test-group", ExtensionType::Group);
+        extension.hotkey = Some("cmd+g".to_string());
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(result.unwrap_err().contains("cannot have hotkey"));
+    }
+
+    #[test]
+    fn test_extension_cannot_have_hotkey() {
+        let mut extension = create_basic_extension("test-ext", ExtensionType::Extension);
+        extension.hotkey = Some("cmd+e".to_string());
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(result.unwrap_err().contains("cannot have hotkey"));
+    }
+
+    #[test]
+    fn test_non_container_types_cannot_have_sub_extensions() {
+        let mut extension = create_basic_extension("test-cmd", ExtensionType::Command);
+        extension.action = Some(create_command_action());
+        extension.commands = Some(vec![create_basic_extension(
+            "sub-cmd",
+            ExtensionType::Command,
+        )]);
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("only extension of type [Group] and [Extension] can have sub-extensions")
+        );
+    }
+
+    #[test]
+    fn test_non_searchable_extension_set_field_settings() {
+        let mut extension = create_basic_extension("test-group", ExtensionType::Group);
+        extension.settings = Some(ExtensionSettings {
+            hide_before_open: None,
+        });
+        let error_msg = general_check(&extension).unwrap_err();
+        assert!(
+            error_msg
+                .contains("field [settings] is currently only allowed in searchable extension")
+        );
+
+        let mut extension = create_basic_extension("test-extension", ExtensionType::Extension);
+        extension.settings = Some(ExtensionSettings {
+            hide_before_open: None,
+        });
+        let error_msg = general_check(&extension).unwrap_err();
+        assert!(
+            error_msg
+                .contains("field [settings] is currently only allowed in searchable extension")
+        );
+    }
+    /* test_check_main_extension_only */
+
+    /* test check_main_extension_or_sub_extension */
+    #[test]
+    fn test_command_must_have_action() {
+        let extension = create_basic_extension("test-cmd", ExtensionType::Command);
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("field [action] should be set for a Command extension")
+        );
+    }
+
+    #[test]
+    fn test_non_command_cannot_have_action() {
+        let mut extension = create_basic_extension("test-script", ExtensionType::Script);
+        extension.action = Some(create_command_action());
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("field [action] is set for a non-Command extension")
+        );
+    }
+
+    #[test]
+    fn test_quicklink_must_have_quicklink_field() {
+        let extension = create_basic_extension("test-quicklink", ExtensionType::Quicklink);
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("field [quicklink] should be set for a Quicklink extension")
+        );
+    }
+
+    #[test]
+    fn test_non_quicklink_cannot_have_quicklink_field() {
+        let mut extension = create_basic_extension("test-cmd", ExtensionType::Command);
+        extension.action = Some(create_command_action());
+        extension.quicklink = Some(create_quicklink());
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("field [quicklink] is set for a non-Quicklink extension")
+        );
+    }
+    /* test check_main_extension_or_sub_extension */
+
+    /* Test check_sub_extension_only */
+    #[test]
+    fn test_sub_extension_cannot_be_group() {
+        let mut extension = create_basic_extension("test-group", ExtensionType::Group);
+        let sub_group = create_basic_extension("sub-group", ExtensionType::Group);
+        extension.commands = Some(vec![sub_group]);
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("sub-extensions should not be of type [Group] or [Extension]")
+        );
+    }
+
+    #[test]
+    fn test_sub_extension_cannot_be_extension() {
+        let mut extension = create_basic_extension("test-ext", ExtensionType::Extension);
+        let sub_ext = create_basic_extension("sub-ext", ExtensionType::Extension);
+        extension.scripts = Some(vec![sub_ext]);
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("sub-extensions should not be of type [Group] or [Extension]")
+        );
+    }
+
+    #[test]
+    fn test_sub_extension_cannot_have_developer() {
+        let mut extension = create_basic_extension("test-group", ExtensionType::Group);
+        let mut sub_cmd = create_basic_extension("sub-cmd", ExtensionType::Command);
+        sub_cmd.action = Some(create_command_action());
+        sub_cmd.developer = Some("test-dev".to_string());
+
+        extension.commands = Some(vec![sub_cmd]);
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("field [developer] should not be set in sub-extensions")
+        );
+    }
+
+    #[test]
+    fn test_sub_extension_cannot_have_sub_extensions() {
+        let mut extension = create_basic_extension("test-group", ExtensionType::Group);
+        let mut sub_cmd = create_basic_extension("sub-cmd", ExtensionType::Command);
+        sub_cmd.action = Some(create_command_action());
+        sub_cmd.commands = Some(vec![create_basic_extension(
+            "nested-cmd",
+            ExtensionType::Command,
+        )]);
+
+        extension.commands = Some(vec![sub_cmd]);
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result.unwrap_err().contains(
+                "fields [commands/scripts/quicklinks] should not be set in sub-extensions"
+            )
+        );
+    }
+    /* Test check_sub_extension_only */
+
+    #[test]
+    fn test_duplicate_sub_extension_ids() {
+        let mut extension = create_basic_extension("test-group", ExtensionType::Group);
+
+        let mut cmd1 = create_basic_extension("duplicate-id", ExtensionType::Command);
+        cmd1.action = Some(create_command_action());
+
+        let mut cmd2 = create_basic_extension("duplicate-id", ExtensionType::Command);
+        cmd2.action = Some(create_command_action());
+
+        extension.commands = Some(vec![cmd1, cmd2]);
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("sub-extension with ID [duplicate-id] already exists")
+        );
+    }
+
+    #[test]
+    fn test_duplicate_ids_across_different_sub_extension_types() {
+        let mut extension = create_basic_extension("test-group", ExtensionType::Group);
+
+        let mut cmd = create_basic_extension("same-id", ExtensionType::Command);
+        cmd.action = Some(create_command_action());
+
+        let script = create_basic_extension("same-id", ExtensionType::Script);
+
+        extension.commands = Some(vec![cmd]);
+        extension.scripts = Some(vec![script]);
+
+        let result = general_check(&extension);
+        assert!(result.is_err());
+        assert!(
+            result
+                .unwrap_err()
+                .contains("sub-extension with ID [same-id] already exists")
+        );
+    }
+
+    #[test]
+    fn test_valid_group_extension() {
+        let mut extension = create_basic_extension("test-group", ExtensionType::Group);
+        extension.commands = Some(vec![create_basic_extension("cmd1", ExtensionType::Command)]);
+
+        assert!(general_check(&extension).is_ok());
+    }
+
+    #[test]
+    fn test_valid_extension_type() {
+        let mut extension = create_basic_extension("test-ext", ExtensionType::Extension);
+        extension.scripts = Some(vec![create_basic_extension(
+            "script1",
+            ExtensionType::Script,
+        )]);
+
+        assert!(general_check(&extension).is_ok());
+    }
+
+    #[test]
+    fn test_valid_command_extension() {
+        let mut extension = create_basic_extension("test-cmd", ExtensionType::Command);
+        extension.action = Some(create_command_action());
+
+        assert!(general_check(&extension).is_ok());
+    }
+
+    #[test]
+    fn test_valid_quicklink_extension() {
+        let mut extension = create_basic_extension("test-quicklink", ExtensionType::Quicklink);
+        extension.quicklink = Some(create_quicklink());
+
+        assert!(general_check(&extension).is_ok());
+    }
+
+    #[test]
+    fn test_valid_complex_extension() {
+        let mut extension = create_basic_extension("spotify-controls", ExtensionType::Extension);
+
+        // Add valid commands
+        let mut play_pause = create_basic_extension("play-pause", ExtensionType::Command);
+        play_pause.action = Some(create_command_action());
+
+        let mut next_track = create_basic_extension("next-track", ExtensionType::Command);
+        next_track.action = Some(create_command_action());
+
+        let mut prev_track = create_basic_extension("prev-track", ExtensionType::Command);
+        prev_track.action = Some(create_command_action());
+
+        extension.commands = Some(vec![play_pause, next_track, prev_track]);
+
+        assert!(general_check(&extension).is_ok());
+    }
+
+    #[test]
+    fn test_valid_single_layer_command() {
+        let mut extension = create_basic_extension("empty-trash", ExtensionType::Command);
+        extension.action = Some(create_command_action());
+
+        assert!(general_check(&extension).is_ok());
+    }
+
+    #[test]
+    fn test_command_alias_and_hotkey_allowed() {
+        let mut extension = create_basic_extension("test-cmd", ExtensionType::Command);
+        extension.action = Some(create_command_action());
+        extension.alias = Some("cmd-alias".to_string());
+        extension.hotkey = Some("cmd+t".to_string());
+
+        assert!(general_check(&extension).is_ok());
+    }
+
+    /*
+     * Tests for check that sub extension cannot support extensions that are not
+     * supported by the main extension
+     *
+     * Start here
+     */
+    #[test]
+    fn test_platform_validation_both_none() {
+        // Case 1: main extension's platforms = None, sub extension's platforms = None
+        // Should return Ok(())
+        let mut main_extension = create_basic_extension("main-ext", ExtensionType::Group);
+        main_extension.platforms = None;
+
+        let mut sub_cmd = create_basic_extension("sub-cmd", ExtensionType::Command);
+        sub_cmd.action = Some(create_command_action());
+        sub_cmd.platforms = None;
+
+        main_extension.commands = Some(vec![sub_cmd]);
+
+        let result = general_check(&main_extension);
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_platform_validation_main_all_sub_none() {
+        // Case 2: main extension's platforms = Some(all platforms), sub extension's platforms = None
+        // Should return Ok(())
+        let mut main_extension = create_basic_extension("main-ext", ExtensionType::Group);
+        main_extension.platforms = Some(Platform::all());
+
+        let mut sub_cmd = create_basic_extension("sub-cmd", ExtensionType::Command);
+        sub_cmd.action = Some(create_command_action());
+        sub_cmd.platforms = None;
+
+        main_extension.commands = Some(vec![sub_cmd]);
+
+        let result = general_check(&main_extension);
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_platform_validation_main_none_sub_some() {
+        // Case 3: main extension's platforms = None, sub extension's platforms = Some([Platform::Macos])
+        // Should return Ok(()) because None means supports all platforms
+        let mut main_extension = create_basic_extension("main-ext", ExtensionType::Group);
+        main_extension.platforms = None;
+
+        let mut sub_cmd = create_basic_extension("sub-cmd", ExtensionType::Command);
+        sub_cmd.action = Some(create_command_action());
+        sub_cmd.platforms = Some(HashSet::from([Platform::Macos]));
+
+        main_extension.commands = Some(vec![sub_cmd]);
+
+        let result = general_check(&main_extension);
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_platform_validation_main_all_sub_subset() {
+        // Case 4: main extension's platforms = Some(all platforms), sub extension's platforms = Some([Platform::Macos])
+        // Should return Ok(()) because sub extension supports a subset of main extension's platforms
+        let mut main_extension = create_basic_extension("main-ext", ExtensionType::Group);
+        main_extension.platforms = Some(Platform::all());
+
+        let mut sub_cmd = create_basic_extension("sub-cmd", ExtensionType::Command);
+        sub_cmd.action = Some(create_command_action());
+        sub_cmd.platforms = Some(HashSet::from([Platform::Macos]));
+
+        main_extension.commands = Some(vec![sub_cmd]);
+
+        let result = general_check(&main_extension);
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_platform_validation_main_limited_sub_unsupported() {
+        // Case 5: main extension's platforms = Some([Platform::Macos]), sub extension's platforms = Some([Platform::Linux])
+        // Should return Err because sub extension supports a platform not supported by main extension
+        let mut main_extension = create_basic_extension("main-ext", ExtensionType::Group);
+        main_extension.platforms = Some(HashSet::from([Platform::Macos]));
+
+        let mut sub_cmd = create_basic_extension("sub-cmd", ExtensionType::Command);
+        sub_cmd.action = Some(create_command_action());
+        sub_cmd.platforms = Some(HashSet::from([Platform::Linux]));
+
+        main_extension.commands = Some(vec![sub_cmd]);
+
+        let result = general_check(&main_extension);
+        assert!(result.is_err());
+        let error_msg = result.unwrap_err();
+        assert!(error_msg.contains("it supports platforms"));
+        assert!(error_msg.contains("that are not supported by the main extension"));
+        assert!(error_msg.contains("Linux")); // Should mention the unsupported platform
+    }
+
+    #[test]
+    fn test_platform_validation_main_partial_sub_unsupported() {
+        // Case 6: main extension's platforms = Some([Platform::Macos, Platform::Windows]), sub extension's platforms = Some([Platform::Linux])
+        // Should return Err because sub extension supports a platform not supported by main extension
+        let mut main_extension = create_basic_extension("main-ext", ExtensionType::Group);
+        main_extension.platforms = Some(HashSet::from([Platform::Macos, Platform::Windows]));
+
+        let mut sub_cmd = create_basic_extension("sub-cmd", ExtensionType::Command);
+        sub_cmd.action = Some(create_command_action());
+        sub_cmd.platforms = Some(HashSet::from([Platform::Linux]));
+
+        main_extension.commands = Some(vec![sub_cmd]);
+
+        let result = general_check(&main_extension);
+        assert!(result.is_err());
+        let error_msg = result.unwrap_err();
+        assert!(error_msg.contains("it supports platforms"));
+        assert!(error_msg.contains("that are not supported by the main extension"));
+        assert!(error_msg.contains("Linux")); // Should mention the unsupported platform
+    }
+
+    #[test]
+    fn test_platform_validation_main_limited_sub_none() {
+        // Case 7: main extension's platforms = Some([Platform::Macos]), sub extension's platforms = None
+        // Should return Ok(()) because when sub extension's platforms is None, it inherits main extension's platforms
+        let mut main_extension = create_basic_extension("main-ext", ExtensionType::Group);
+        main_extension.platforms = Some(HashSet::from([Platform::Macos]));
+
+        let mut sub_cmd = create_basic_extension("sub-cmd", ExtensionType::Command);
+        sub_cmd.action = Some(create_command_action());
+        sub_cmd.platforms = None;
+
+        main_extension.commands = Some(vec![sub_cmd]);
+
+        let result = general_check(&main_extension);
+        assert!(result.is_ok());
+    }
+    /*
+     * Tests for check that sub extension cannot support extensions that are not
+     * supported by the main extension
+     *
+     * End here
+     */
+}

src-tauri/src/extension/third_party/install/local_extension.rs

@@ -0,0 +1,253 @@
+use crate::extension::PLUGIN_JSON_FILE_NAME;
+use crate::extension::third_party::check::general_check;
+use crate::extension::third_party::install::{
+    filter_out_incompatible_sub_extensions, is_extension_installed,
+};
+use crate::extension::third_party::{
+    THIRD_PARTY_EXTENSIONS_SEARCH_SOURCE, get_third_party_extension_directory,
+};
+use crate::extension::{Extension, canonicalize_relative_icon_path};
+use crate::util::platform::Platform;
+use serde_json::Value as Json;
+use std::path::Path;
+use std::path::PathBuf;
+use tauri::AppHandle;
+use tokio::fs;
+
+/// All the extensions installed from local file will belong to a special developer
+/// "__local__".
+const DEVELOPER_ID_LOCAL: &str = "__local__";
+
+/// Install the extension specified by `path`.
+///
+/// `path` should point to a directory with the following structure:
+///
+/// ```text
+/// extension-directory/
+/// ├── assets/
+/// │   ├── icon.png
+/// │   └── other-assets...
+/// └── plugin.json
+/// ```
+#[tauri::command]
+pub(crate) async fn install_local_extension(
+    tauri_app_handle: AppHandle,
+    path: PathBuf,
+) -> Result<(), String> {
+    let extension_dir_name = path
+        .file_name()
+        .ok_or_else(|| "Invalid extension: no directory name".to_string())?
+        .to_str()
+        .ok_or_else(|| "Invalid extension: non-UTF8 extension id".to_string())?;
+
+    // we use extension directory name as the extension ID.
+    let extension_id = extension_dir_name;
+    if is_extension_installed(DEVELOPER_ID_LOCAL, extension_id).await {
+        // The frontend code uses this string to distinguish between 2 error cases:
+        //
+        // 1. This extension is already imported
+        // 2. This extension is incompatible with the current platform
+        // 3. The selected directory does not contain a valid extension
+        //
+        // do NOT edit this without updating the frontend code.
+        //
+        // ```ts
+        // if (errorMessage === "already imported") {
+        //   addError(t("settings.extensions.hints.extensionAlreadyImported"));
+        // } else if (errorMessage === "incompatible") {
+        //   addError(t("settings.extensions.hints.incompatibleExtension"));
+        // } else {
+        //   addError(t("settings.extensions.hints.importFailed"));
+        // }
+        // ```
+        //
+        // This is definitely error-prone, but we have to do this until we have
+        // structured error type
+        return Err("already imported".into());
+    }
+
+    let plugin_json_path = path.join(PLUGIN_JSON_FILE_NAME);
+
+    let plugin_json_content = fs::read_to_string(&plugin_json_path)
+        .await
+        .map_err(|e| e.to_string())?;
+
+    // Parse as JSON first as it is not valid for `struct Extension`, we need to
+    // correct it (set fields `id` and `developer`) before converting it to `struct Extension`:
+    let mut extension_json: Json =
+        serde_json::from_str(&plugin_json_content).map_err(|e| e.to_string())?;
+
+    // Set the main extension ID to the directory name
+    let extension_obj = extension_json
+        .as_object_mut()
+        .expect("extension_json should be an object");
+    extension_obj.insert("id".to_string(), Json::String(extension_id.to_string()));
+    extension_obj.insert(
+        "developer".to_string(),
+        Json::String(DEVELOPER_ID_LOCAL.to_string()),
+    );
+
+    // Counter for sub-extension IDs
+    let mut counter = 1u32;
+
+    // Set IDs for commands
+    if let Some(commands) = extension_obj.get_mut("commands") {
+        if let Some(commands_array) = commands.as_array_mut() {
+            for command in commands_array {
+                if let Some(command_obj) = command.as_object_mut() {
+                    command_obj.insert("id".to_string(), Json::String(counter.to_string()));
+                    counter += 1;
+                }
+            }
+        }
+    }
+
+    // Set IDs for quicklinks
+    if let Some(quicklinks) = extension_obj.get_mut("quicklinks") {
+        if let Some(quicklinks_array) = quicklinks.as_array_mut() {
+            for quicklink in quicklinks_array {
+                if let Some(quicklink_obj) = quicklink.as_object_mut() {
+                    quicklink_obj.insert("id".to_string(), Json::String(counter.to_string()));
+                    counter += 1;
+                }
+            }
+        }
+    }
+
+    // Set IDs for scripts
+    if let Some(scripts) = extension_obj.get_mut("scripts") {
+        if let Some(scripts_array) = scripts.as_array_mut() {
+            for script in scripts_array {
+                if let Some(script_obj) = script.as_object_mut() {
+                    script_obj.insert("id".to_string(), Json::String(counter.to_string()));
+                    counter += 1;
+                }
+            }
+        }
+    }
+
+    // Now we can convert JSON to `struct Extension`
+    let mut extension: Extension =
+        serde_json::from_value(extension_json).map_err(|e| e.to_string())?;
+
+    let current_platform = Platform::current();
+    /* Check begins here */
+    general_check(&extension)?;
+
+    if let Some(ref platforms) = extension.platforms {
+        if !platforms.contains(&current_platform) {
+            // The frontend code uses this string to distinguish between 3 error cases:
+            //
+            // 1. This extension is already imported
+            // 2. This extension is incompatible with the current platform
+            // 3. The selected directory does not contain a valid extension
+            //
+            // do NOT edit this without updating the frontend code.
+            //
+            // ```ts
+            // if (errorMessage === "already imported") {
+            //   addError(t("settings.extensions.hints.extensionAlreadyImported"));
+            // } else if (errorMessage === "incompatible") {
+            //   addError(t("settings.extensions.hints.incompatibleExtension"));
+            // } else {
+            //   addError(t("settings.extensions.hints.importFailed"));
+            // }
+            // ```
+            //
+            // This is definitely error-prone, but we have to do this until we have
+            // structured error type
+            return Err("incompatible".into());
+        }
+    }
+    /* Check ends here */
+
+    // Extension is compatible with current platform, but it could contain sub
+    // extensions that are not, filter them out.
+    filter_out_incompatible_sub_extensions(&mut extension, current_platform);
+
+    // We are going to modify our third-party extension list, grab the write lock
+    // to ensure exclusive access.
+    let mut third_party_ext_list_write_lock = THIRD_PARTY_EXTENSIONS_SEARCH_SOURCE
+        .get()
+        .expect("global third party search source not set")
+        .write_lock()
+        .await;
+
+    // Create destination directory
+    let dest_dir = get_third_party_extension_directory(&tauri_app_handle)
+        .join(DEVELOPER_ID_LOCAL)
+        .join(extension_dir_name);
+
+    fs::create_dir_all(&dest_dir)
+        .await
+        .map_err(|e| e.to_string())?;
+
+    // Copy all files except plugin.json
+    let mut entries = fs::read_dir(&path).await.map_err(|e| e.to_string())?;
+
+    while let Some(entry) = entries.next_entry().await.map_err(|e| e.to_string())? {
+        let file_name = entry.file_name();
+        let file_name_str = file_name
+            .to_str()
+            .ok_or_else(|| "Invalid filename: non-UTF8".to_string())?;
+
+        // plugin.json will be handled separately.
+        if file_name_str == PLUGIN_JSON_FILE_NAME {
+            continue;
+        }
+
+        let src_path = entry.path();
+        let dest_path = dest_dir.join(&file_name);
+
+        if src_path.is_dir() {
+            // Recursively copy directory
+            copy_dir_recursively(&src_path, &dest_path).await?;
+        } else {
+            // Copy file
+            fs::copy(&src_path, &dest_path)
+                .await
+                .map_err(|e| e.to_string())?;
+        }
+    }
+
+    // Write the corrected plugin.json file
+    let corrected_plugin_json =
+        serde_json::to_string_pretty(&extension).map_err(|e| e.to_string())?;
+
+    let dest_plugin_json_path = dest_dir.join(PLUGIN_JSON_FILE_NAME);
+    fs::write(&dest_plugin_json_path, corrected_plugin_json)
+        .await
+        .map_err(|e| e.to_string())?;
+
+    // Canonicalize relative icon paths
+    canonicalize_relative_icon_path(&dest_dir, &mut extension)?;
+
+    // Add extension to the search source
+    third_party_ext_list_write_lock.push(extension);
+
+    Ok(())
+}
+
+/// Helper function to recursively copy directories.
+#[async_recursion::async_recursion]
+async fn copy_dir_recursively(src: &Path, dest: &Path) -> Result<(), String> {
+    tokio::fs::create_dir_all(dest)
+        .await
+        .map_err(|e| e.to_string())?;
+    let mut read_dir = tokio::fs::read_dir(src).await.map_err(|e| e.to_string())?;
+
+    while let Some(entry) = read_dir.next_entry().await.map_err(|e| e.to_string())? {
+        let src_path = entry.path();
+        let dest_path = dest.join(entry.file_name());
+
+        if src_path.is_dir() {
+            copy_dir_recursively(&src_path, &dest_path).await?;
+        } else {
+            tokio::fs::copy(&src_path, &dest_path)
+                .await
+                .map_err(|e| e.to_string())?;
+        }
+    }
+
+    Ok(())
+}

src-tauri/src/extension/third_party/install/mod.rs

@@ -0,0 +1,224 @@
+//! This module contains the code of extension installation.
+//!
+//!
+//! # How
+//!
+//! Technically, installing an extension involves the following steps:
+//!   
+//!   1. Correct the `plugin.json` JSON if it does not conform to our `struct Extension`
+//!      definition.
+//!
+//!   2. Write the extension files to the corresponding location
+//!
+//!      * developer directory
+//!        * extension directory
+//!          * assets directory
+//!            * various assets files, e.g., "icon.png"
+//!          * plugin.json file
+//!
+//!   3. Canonicalize the `Extension.icon` fields if they are relative paths
+//!      (relative to the `assets` directory)
+//!
+//!   4. Deserialize the `plugin.json` file to a `struct Extension`, and call
+//!      `THIRD_PARTY_EXTENSIONS_DIRECTORY.add_extension(extension)` to add it to
+//!      the in-memory extension list.
+
+pub(crate) mod local_extension;
+pub(crate) mod store;
+
+use crate::extension::Extension;
+use crate::util::platform::Platform;
+
+use super::THIRD_PARTY_EXTENSIONS_SEARCH_SOURCE;
+
+pub(crate) async fn is_extension_installed(developer: &str, extension_id: &str) -> bool {
+    THIRD_PARTY_EXTENSIONS_SEARCH_SOURCE
+        .get()
+        .expect("global third party search source not set")
+        .extension_exists(developer, extension_id)
+        .await
+}
+
+/// Filters out sub-extensions that are not compatible with the current platform.
+///
+/// We make `current_platform` an argument so that this function is testable.
+pub(crate) fn filter_out_incompatible_sub_extensions(
+    extension: &mut Extension,
+    current_platform: Platform,
+) {
+    // Only process extensions of type Group or Extension that can have sub-extensions
+    if !extension.r#type.contains_sub_items() {
+        return;
+    }
+
+    // Filter commands
+    if let Some(ref mut commands) = extension.commands {
+        commands.retain(|sub_ext| {
+            // If platforms is None, the sub-extension is compatible with all platforms
+            if let Some(ref platforms) = sub_ext.platforms {
+                platforms.contains(&current_platform)
+            } else {
+                true
+            }
+        });
+    }
+
+    // Filter scripts
+    if let Some(ref mut scripts) = extension.scripts {
+        scripts.retain(|sub_ext| {
+            // If platforms is None, the sub-extension is compatible with all platforms
+            if let Some(ref platforms) = sub_ext.platforms {
+                platforms.contains(&current_platform)
+            } else {
+                true
+            }
+        });
+    }
+
+    // Filter quicklinks
+    if let Some(ref mut quicklinks) = extension.quicklinks {
+        quicklinks.retain(|sub_ext| {
+            // If platforms is None, the sub-extension is compatible with all platforms
+            if let Some(ref platforms) = sub_ext.platforms {
+                platforms.contains(&current_platform)
+            } else {
+                true
+            }
+        });
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::extension::ExtensionType;
+    use std::collections::HashSet;
+
+    /// Helper function to create a basic extension for testing
+    /// `filter_out_incompatible_sub_extensions`
+    fn create_test_extension(
+        extension_type: ExtensionType,
+        platforms: Option<HashSet<Platform>>,
+    ) -> Extension {
+        Extension {
+            id: "ID".into(),
+            name: "name".into(),
+            developer: None,
+            platforms,
+            description: "Test extension".to_string(),
+            icon: "test-icon".to_string(),
+            r#type: extension_type,
+            action: None,
+            quicklink: None,
+            commands: None,
+            scripts: None,
+            quicklinks: None,
+            alias: None,
+            hotkey: None,
+            enabled: true,
+            settings: None,
+            screenshots: None,
+            url: None,
+            version: None,
+        }
+    }
+
+    #[test]
+    fn test_filter_out_incompatible_sub_extensions_filter_non_group_extension_unchanged() {
+        // Command
+        let mut extension = create_test_extension(ExtensionType::Command, None);
+        let clone = extension.clone();
+        filter_out_incompatible_sub_extensions(&mut extension, Platform::Linux);
+        assert_eq!(extension, clone);
+
+        // Quicklink
+        let mut extension = create_test_extension(ExtensionType::Quicklink, None);
+        let clone = extension.clone();
+        filter_out_incompatible_sub_extensions(&mut extension, Platform::Linux);
+        assert_eq!(extension, clone);
+    }
+
+    #[test]
+    fn test_filter_out_incompatible_sub_extensions() {
+        let mut main_extension = create_test_extension(ExtensionType::Group, None);
+        // init sub extensions, which are macOS-only
+        let commands = vec![create_test_extension(
+            ExtensionType::Command,
+            Some(HashSet::from([Platform::Macos])),
+        )];
+        let quicklinks = vec![create_test_extension(
+            ExtensionType::Quicklink,
+            Some(HashSet::from([Platform::Macos])),
+        )];
+        let scripts = vec![create_test_extension(
+            ExtensionType::Script,
+            Some(HashSet::from([Platform::Macos])),
+        )];
+        // Set sub extensions
+        main_extension.commands = Some(commands);
+        main_extension.quicklinks = Some(quicklinks);
+        main_extension.scripts = Some(scripts);
+
+        // Current platform is Linux, all the sub extensions should be filtered out.
+        filter_out_incompatible_sub_extensions(&mut main_extension, Platform::Linux);
+
+        // assertions
+        assert!(main_extension.commands.unwrap().is_empty());
+        assert!(main_extension.quicklinks.unwrap().is_empty());
+        assert!(main_extension.scripts.unwrap().is_empty());
+    }
+
+    /// Sub extensions are compatible with all the platforms, nothing to filter out.
+    #[test]
+    fn test_filter_out_incompatible_sub_extensions_all_compatible() {
+        {
+            let mut main_extension = create_test_extension(ExtensionType::Group, None);
+            // init sub extensions, which are compatible with all the platforms
+            let commands = vec![create_test_extension(
+                ExtensionType::Command,
+                Some(Platform::all()),
+            )];
+            let quicklinks = vec![create_test_extension(
+                ExtensionType::Quicklink,
+                Some(Platform::all()),
+            )];
+            let scripts = vec![create_test_extension(
+                ExtensionType::Script,
+                Some(Platform::all()),
+            )];
+            // Set sub extensions
+            main_extension.commands = Some(commands);
+            main_extension.quicklinks = Some(quicklinks);
+            main_extension.scripts = Some(scripts);
+
+            // Current platform is Linux, all the sub extensions should be filtered out.
+            filter_out_incompatible_sub_extensions(&mut main_extension, Platform::Linux);
+
+            // assertions
+            assert_eq!(main_extension.commands.unwrap().len(), 1);
+            assert_eq!(main_extension.quicklinks.unwrap().len(), 1);
+            assert_eq!(main_extension.scripts.unwrap().len(), 1);
+        }
+
+        // `platforms: None` means all platforms as well
+        {
+            let mut main_extension = create_test_extension(ExtensionType::Group, None);
+            // init sub extensions, which are compatible with all the platforms
+            let commands = vec![create_test_extension(ExtensionType::Command, None)];
+            let quicklinks = vec![create_test_extension(ExtensionType::Quicklink, None)];
+            let scripts = vec![create_test_extension(ExtensionType::Script, None)];
+            // Set sub extensions
+            main_extension.commands = Some(commands);
+            main_extension.quicklinks = Some(quicklinks);
+            main_extension.scripts = Some(scripts);
+
+            // Current platform is Linux, all the sub extensions should be filtered out.
+            filter_out_incompatible_sub_extensions(&mut main_extension, Platform::Linux);
+
+            // assertions
+            assert_eq!(main_extension.commands.unwrap().len(), 1);
+            assert_eq!(main_extension.quicklinks.unwrap().len(), 1);
+            assert_eq!(main_extension.scripts.unwrap().len(), 1);
+        }
+    }
+}

src-tauri/src/extension/third_party/install/store.rs

@@ -0,0 +1,403 @@
+//! Extension store related stuff.
+
+use super::super::LOCAL_QUERY_SOURCE_TYPE;
+use super::is_extension_installed;
+use crate::common::document::DataSourceReference;
+use crate::common::document::Document;
+use crate::common::error::SearchError;
+use crate::common::search::QueryResponse;
+use crate::common::search::QuerySource;
+use crate::common::search::SearchQuery;
+use crate::common::traits::SearchSource;
+use crate::extension::Extension;
+use crate::extension::PLUGIN_JSON_FILE_NAME;
+use crate::extension::THIRD_PARTY_EXTENSIONS_SEARCH_SOURCE;
+use crate::extension::canonicalize_relative_icon_path;
+use crate::extension::third_party::check::general_check;
+use crate::extension::third_party::get_third_party_extension_directory;
+use crate::extension::third_party::install::filter_out_incompatible_sub_extensions;
+use crate::server::http_client::HttpClient;
+use crate::util::platform::Platform;
+use async_trait::async_trait;
+use http::Method;
+use reqwest::StatusCode;
+use serde_json::Map as JsonObject;
+use serde_json::Value as Json;
+use std::io::Read;
+use tauri::AppHandle;
+
+const DATA_SOURCE_ID: &str = "Extension Store";
+
+pub(crate) struct ExtensionStore;
+
+#[async_trait]
+impl SearchSource for ExtensionStore {
+    fn get_type(&self) -> QuerySource {
+        QuerySource {
+            r#type: LOCAL_QUERY_SOURCE_TYPE.into(),
+            name: hostname::get()
+                .unwrap_or(DATA_SOURCE_ID.into())
+                .to_string_lossy()
+                .into(),
+            id: DATA_SOURCE_ID.into(),
+        }
+    }
+
+    async fn search(
+        &self,
+        _tauri_app_handle: AppHandle,
+        query: SearchQuery,
+    ) -> Result<QueryResponse, SearchError> {
+        const SCORE: f64 = 2000.0;
+
+        let Some(query_string) = query.query_strings.get("query") else {
+            return Ok(QueryResponse {
+                source: self.get_type(),
+                hits: Vec::new(),
+                total_hits: 0,
+            });
+        };
+
+        let lowercase_query_string = query_string.to_lowercase();
+        let expected_str = "extension store";
+
+        if expected_str.contains(&lowercase_query_string) {
+            let doc = Document {
+                id: DATA_SOURCE_ID.to_string(),
+                category: Some(DATA_SOURCE_ID.to_string()),
+                title: Some(DATA_SOURCE_ID.to_string()),
+                icon: Some("font_Store".to_string()),
+                source: Some(DataSourceReference {
+                    r#type: Some(LOCAL_QUERY_SOURCE_TYPE.into()),
+                    name: Some(DATA_SOURCE_ID.into()),
+                    id: Some(DATA_SOURCE_ID.into()),
+                    icon: Some("font_Store".to_string()),
+                }),
+                ..Default::default()
+            };
+
+            Ok(QueryResponse {
+                source: self.get_type(),
+                hits: vec![(doc, SCORE)],
+                total_hits: 1,
+            })
+        } else {
+            Ok(QueryResponse {
+                source: self.get_type(),
+                hits: Vec::new(),
+                total_hits: 0,
+            })
+        }
+    }
+}
+
+#[tauri::command]
+pub(crate) async fn search_extension(
+    query_params: Option<Vec<String>>,
+) -> Result<Vec<Json>, String> {
+    let response = HttpClient::get(
+        "default_coco_server",
+        "store/extension/_search",
+        query_params,
+    )
+    .await
+    .map_err(|e| format!("Failed to send request: {:?}", e))?;
+
+    // The response of a ES style search request
+    let mut response: JsonObject<String, Json> = response
+        .json()
+        .await
+        .map_err(|e| format!("Failed to parse response: {:?}", e))?;
+
+    let hits_json = response
+        .remove("hits")
+        .expect("the JSON response should contain field [hits]");
+    let mut hits = match hits_json {
+        Json::Object(obj) => obj,
+        _ => panic!(
+            "field [hits] should be a JSON object, but it is not, value: [{}]",
+            hits_json
+        ),
+    };
+
+    let Some(hits_hits_json) = hits.remove("hits") else {
+        return Ok(Vec::new());
+    };
+
+    let hits_hits = match hits_hits_json {
+        Json::Array(arr) => arr,
+        _ => panic!(
+            "field [hits.hits] should be an array, but it is not, value: [{}]",
+            hits_hits_json
+        ),
+    };
+
+    let mut extensions = Vec::with_capacity(hits_hits.len());
+    for hit in hits_hits {
+        let mut hit_obj = match hit {
+            Json::Object(obj) => obj,
+            _ => panic!(
+                "each hit in [hits.hits] should be a JSON object, but it is not, value: [{}]",
+                hit
+            ),
+        };
+        let source = hit_obj
+            .remove("_source")
+            .expect("each hit should contain field [_source]");
+
+        let mut source_obj = match source {
+            Json::Object(obj) => obj,
+            _ => panic!(
+                "field [_source] should be a JSON object, but it is not, value: [{}]",
+                source
+            ),
+        };
+
+        let developer_id = source_obj
+            .get("developer")
+            .and_then(|dev| dev.get("id"))
+            .and_then(|id| id.as_str())
+            .expect("developer.id should exist");
+
+        let extension_id = source_obj
+            .get("id")
+            .and_then(|id| id.as_str())
+            .expect("extension id should exist");
+
+        let installed = is_extension_installed(developer_id, extension_id).await;
+        source_obj.insert("installed".to_string(), Json::Bool(installed));
+
+        extensions.push(Json::Object(source_obj));
+    }
+
+    Ok(extensions)
+}
+
+#[tauri::command]
+pub(crate) async fn extension_detail(
+    id: String,
+) -> Result<Option<JsonObject<String, Json>>, String> {
+    let url = format!("http://dev.infini.cloud:27200/store/extension/{}", id);
+    let response =
+        HttpClient::send_raw_request(Method::GET, url.as_str(), None, None, None).await?;
+
+    if response.status() == StatusCode::NOT_FOUND {
+        return Ok(None);
+    }
+
+    let response_dbg_str = format!("{:?}", response);
+    // The response of an ES style GET request
+    let mut response: JsonObject<String, Json> = response.json().await.unwrap_or_else(|_e| {
+        panic!(
+            "response body of [/store/extension/<ID>] is not a JSON object, response [{:?}]",
+            response_dbg_str
+        )
+    });
+    let source_json = response.remove("_source").unwrap_or_else(|| {
+        panic!("field [_source] not found in the JSON returned from [/store/extension/<ID>]")
+    });
+    let mut source_obj = match source_json {
+        Json::Object(obj) => obj,
+        _ => panic!(
+            "field [_source] should be a JSON object, but it is not, value: [{}]",
+            source_json
+        ),
+    };
+
+    let developer_id = match &source_obj["developer"]["id"] {
+        Json::String(dev) => dev,
+        _ => {
+            panic!(
+                "field [_source.developer.id] should be a string, but it is not, value: [{}]",
+                source_obj["developer"]["id"]
+            )
+        }
+    };
+    let installed = is_extension_installed(developer_id, &id).await;
+    source_obj.insert("installed".to_string(), Json::Bool(installed));
+
+    Ok(Some(source_obj))
+}
+
+#[tauri::command]
+pub(crate) async fn install_extension_from_store(
+    tauri_app_handle: AppHandle,
+    id: String,
+) -> Result<(), String> {
+    let path = format!("store/extension/{}/_download", id);
+    let response = HttpClient::get("default_coco_server", &path, None)
+        .await
+        .map_err(|e| format!("Failed to download extension: {}", e))?;
+
+    if response.status() == StatusCode::NOT_FOUND {
+        return Err(format!("extension [{}] not found", id));
+    }
+
+    let bytes = response
+        .bytes()
+        .await
+        .map_err(|e| format!("Failed to read response bytes: {}", e))?;
+
+    let cursor = std::io::Cursor::new(bytes);
+    let mut archive =
+        zip::ZipArchive::new(cursor).map_err(|e| format!("Failed to read zip archive: {}", e))?;
+
+    // The plugin.json sent from the server does not conform to our `struct Extension` definition:
+    //
+    // 1. Its `developer` field is a JSON object, but we need a string
+    // 2. sub-extensions won't have their `id` fields set
+    //
+    // we need to correct it
+    let mut plugin_json = archive
+        .by_name(PLUGIN_JSON_FILE_NAME)
+        .map_err(|e| e.to_string())?;
+    let mut plugin_json_content = String::new();
+    std::io::Read::read_to_string(&mut plugin_json, &mut plugin_json_content)
+        .map_err(|e| e.to_string())?;
+    let mut extension: Json = serde_json::from_str(&plugin_json_content)
+        .map_err(|e| format!("Failed to parse plugin.json: {}", e))?;
+
+    let mut_ref_to_developer_object: &mut Json = extension
+        .as_object_mut()
+        .expect("plugin.json should be an object")
+        .get_mut("developer")
+        .expect("plugin.json should contain field [developer]");
+    let developer_id = mut_ref_to_developer_object
+        .get("id")
+        .expect("plugin.json should contain [developer.id]")
+        .as_str()
+        .expect("plugin.json field [developer.id] should be a string");
+    *mut_ref_to_developer_object = Json::String(developer_id.into());
+
+    // Set IDs for sub-extensions (commands, quicklinks, scripts)
+    let mut counter = 0;
+    // Helper function to set IDs for array fields
+    fn set_ids_for_field(extension: &mut Json, field_name: &str, counter: &mut i32) {
+        if let Some(field) = extension.as_object_mut().unwrap().get_mut(field_name) {
+            if let Some(array) = field.as_array_mut() {
+                for item in array {
+                    if let Some(item_obj) = item.as_object_mut() {
+                        if !item_obj.contains_key("id") {
+                            item_obj.insert("id".to_string(), Json::String(counter.to_string()));
+                            *counter += 1;
+                        }
+                    }
+                }
+            }
+        }
+    }
+    set_ids_for_field(&mut extension, "commands", &mut counter);
+    set_ids_for_field(&mut extension, "quicklinks", &mut counter);
+    set_ids_for_field(&mut extension, "scripts", &mut counter);
+
+    // Now the extension JSON is valid
+    let mut extension: Extension = serde_json::from_value(extension).unwrap_or_else(|e| {
+        panic!(
+            "cannot parse plugin.json as struct Extension, error [{:?}]",
+            e
+        );
+    });
+    let developer_id = extension.developer.clone().expect("developer has been set");
+
+    drop(plugin_json);
+
+    general_check(&extension)?;
+
+    let current_platform = Platform::current();
+    if let Some(ref platforms) = extension.platforms {
+        if !platforms.contains(&current_platform) {
+            return Err("this extension is not compatible with your OS".into());
+        }
+    }
+
+    if is_extension_installed(&developer_id, &id).await {
+        return Err("Extension already installed.".into());
+    }
+
+    // Extension is compatible with current platform, but it could contain sub
+    // extensions that are not, filter them out.
+    filter_out_incompatible_sub_extensions(&mut extension, current_platform);
+
+    // We are going to modify our third-party extension list, grab the write lock
+    // to ensure exclusive access.
+    let mut third_party_ext_list_write_lock = THIRD_PARTY_EXTENSIONS_SEARCH_SOURCE
+        .get()
+        .expect("global third party search source not set")
+        .write_lock()
+        .await;
+
+    // Write extension files to the extension directory
+    let extension_id = extension.id.clone();
+    let extension_directory = {
+        let mut path = get_third_party_extension_directory(&tauri_app_handle);
+        path.push(developer_id);
+        path.push(extension_id.as_str());
+        path
+    };
+    tokio::fs::create_dir_all(extension_directory.as_path())
+        .await
+        .map_err(|e| e.to_string())?;
+
+    // Extract all files except plugin.json
+    for i in 0..archive.len() {
+        let mut zip_file = archive.by_index(i).map_err(|e| e.to_string())?;
+        // `.name()` is safe to use in our cases, the cases listed in the below
+        // page won't happen to us.
+        //
+        // https://docs.rs/zip/4.2.0/zip/read/struct.ZipFile.html#method.name
+        //
+        // Example names:
+        //
+        // * `assets/icon.png`
+        // * `assets/screenshot.png`
+        // * `plugin.json`
+        //
+        // Yes, the `assets` directory is not a part of it.
+        let zip_file_name = zip_file.name();
+
+        // Skip the plugin.json file as we'll create it from the extension variable
+        if zip_file_name == PLUGIN_JSON_FILE_NAME {
+            continue;
+        }
+
+        let dest_file_path = extension_directory.join(zip_file_name);
+
+        // For cases like `assets/xxx.png`
+        if let Some(parent_dir) = dest_file_path.parent()
+            && !parent_dir.exists()
+        {
+            tokio::fs::create_dir_all(parent_dir)
+                .await
+                .map_err(|e| e.to_string())?;
+        }
+
+        let mut dest_file = tokio::fs::File::create(&dest_file_path)
+            .await
+            .map_err(|e| e.to_string())?;
+        let mut src_bytes = Vec::with_capacity(
+            zip_file
+                .size()
+                .try_into()
+                .expect("we won't have a extension file that is bigger than 4GiB"),
+        );
+        zip_file
+            .read_to_end(&mut src_bytes)
+            .map_err(|e| e.to_string())?;
+        tokio::io::copy(&mut src_bytes.as_slice(), &mut dest_file)
+            .await
+            .map_err(|e| e.to_string())?;
+    }
+    // Create plugin.json from the extension variable
+    let plugin_json_path = extension_directory.join(PLUGIN_JSON_FILE_NAME);
+    let extension_json = serde_json::to_string_pretty(&extension).map_err(|e| e.to_string())?;
+    tokio::fs::write(&plugin_json_path, extension_json)
+        .await
+        .map_err(|e| e.to_string())?;
+
+    // Turn it into an absolute path if it is a valid relative path because frontend code need this.
+    canonicalize_relative_icon_path(&extension_directory, &mut extension)?;
+
+    third_party_ext_list_write_lock.push(extension);
+
+    Ok(())
+}

src-tauri/src/lib.rs

@@ -1,31 +1,24 @@
 mod assistant;
 mod autostart;
 mod common;
-mod local;
+mod extension;
 mod search;
 mod server;
+mod settings;
 mod setup;
 mod shortcut;
 mod util;
 
 use crate::common::register::SearchSourceRegistry;
-// use crate::common::traits::SearchSource;
-use crate::common::{MAIN_WINDOW_LABEL, SETTINGS_WINDOW_LABEL};
-use crate::server::search::CocoSearchSource;
+use crate::common::{CHECK_WINDOW_LABEL, MAIN_WINDOW_LABEL, SETTINGS_WINDOW_LABEL};
 use crate::server::servers::{load_or_insert_default_server, load_servers_token};
-use autostart::{change_autostart, enable_autostart};
+use autostart::change_autostart;
 use lazy_static::lazy_static;
-use reqwest::Client;
-use std::path::PathBuf;
 use std::sync::Mutex;
-#[cfg(target_os = "macos")]
-use tauri::ActivationPolicy;
-use tauri::{
-    AppHandle, Emitter, Manager, PhysicalPosition, Runtime, State, WebviewWindow, Window,
-    WindowEvent,
-};
+use std::sync::OnceLock;
+use tauri::plugin::TauriPlugin;
+use tauri::{AppHandle, Emitter, Manager, PhysicalPosition, WebviewWindow, WindowEvent};
 use tauri_plugin_autostart::MacosLauncher;
-use tokio::runtime::Runtime as RT;
 
 /// Tauri store name
 pub(crate) const COCO_TAURI_STORE: &str = "coco_tauri_store";
@@ -33,9 +26,18 @@ pub(crate) const COCO_TAURI_STORE: &str = "coco_tauri_store";
 lazy_static! {
     static ref PREVIOUS_MONITOR_NAME: Mutex<Option<String>> = Mutex::new(None);
 }
+/// To allow us to access tauri's `AppHandle` when its context is inaccessible,
+/// store it globally. It will be set in `init()`.
+///
+/// # WARNING
+///
+/// You may find this work, but the usage is discouraged and should be generally
+/// avoided. If you do need it, always be careful that it may not be set() when
+/// you access it.
+pub(crate) static GLOBAL_TAURI_APP_HANDLE: OnceLock<AppHandle> = OnceLock::new();
 
 #[tauri::command]
-fn change_window_height(handle: AppHandle, height: u32) {
+async fn change_window_height(handle: AppHandle, height: u32) {
     let window: WebviewWindow = handle.get_webview_window(MAIN_WINDOW_LABEL).unwrap();
 
     let mut size = window.outer_size().unwrap();
@@ -45,10 +47,12 @@ fn change_window_height(handle: AppHandle, height: u32) {
 
 #[derive(serde::Deserialize)]
 struct ThemeChangedPayload {
+    #[allow(dead_code)]
     is_dark_mode: bool,
 }
 
 #[derive(Clone, serde::Serialize)]
+#[allow(dead_code)]
 struct Payload {
     args: Vec<String>,
     cwd: String,
@@ -56,25 +60,23 @@ struct Payload {
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
-    let mut ctx = tauri::generate_context!();
-    // Initialize logger
-    env_logger::init();
+    let ctx = tauri::generate_context!();
 
     let mut app_builder = tauri::Builder::default();
+    // Set up logger first
+    app_builder = app_builder.plugin(set_up_tauri_logger());
 
     #[cfg(desktop)]
     {
-        app_builder = app_builder.plugin(tauri_plugin_single_instance::init(|_app, argv, _cwd| {
-            println!("a new app instance was opened with {argv:?} and the deep link event was already triggered");
-            // when defining deep link schemes at runtime, you must also check `argv` here
-        }));
+        app_builder =
+            app_builder.plugin(tauri_plugin_single_instance::init(|_app, _argv, _cwd| {}));
     }
 
     app_builder = app_builder
         .plugin(tauri_plugin_http::init())
         .plugin(tauri_plugin_shell::init())
         .plugin(tauri_plugin_autostart::init(
-            MacosLauncher::AppleScript,
+            MacosLauncher::LaunchAgent,
             None,
         ))
         .plugin(tauri_plugin_deep_link::init())
@@ -83,7 +85,14 @@ pub fn run() {
         .plugin(tauri_plugin_fs_pro::init())
         .plugin(tauri_plugin_macos_permissions::init())
         .plugin(tauri_plugin_screenshots::init())
-        .plugin(tauri_plugin_process::init());
+        .plugin(tauri_plugin_process::init())
+        .plugin(
+            tauri_plugin_updater::Builder::new()
+                .default_version_comparator(crate::util::updater::custom_version_comparator)
+                .build(),
+        )
+        .plugin(tauri_plugin_windows_version::init())
+        .plugin(tauri_plugin_opener::init());
 
     // Conditional compilation for macOS
     #[cfg(target_os = "macos")]
@@ -101,7 +110,8 @@ pub fn run() {
             show_coco,
             hide_coco,
             show_settings,
-            server::servers::get_server_token,
+            show_check,
+            hide_check,
             server::servers::add_coco_server,
             server::servers::remove_coco_server,
             server::servers::list_coco_servers,
@@ -111,77 +121,91 @@ pub fn run() {
             server::servers::disable_server,
             server::auth::handle_sso_callback,
             server::profile::get_user_profiles,
-            server::datasource::get_datasources_by_server,
+            server::datasource::datasource_search,
+            server::datasource::mcp_server_search,
             server::connector::get_connectors_by_server,
             search::query_coco_fusion,
             assistant::chat_history,
-            assistant::new_chat,
-            assistant::send_message,
+            assistant::chat_create,
+            assistant::chat_chat,
             assistant::session_chat_history,
             assistant::open_session_chat,
             assistant::close_session_chat,
             assistant::cancel_session_chat,
+            assistant::delete_session_chat,
+            assistant::update_session_chat,
+            assistant::assistant_search,
+            assistant::assistant_get,
+            assistant::assistant_get_multi,
             // server::get_coco_server_datasources,
             // server::get_coco_server_connectors,
-            server::websocket::connect_to_server,
-            server::websocket::disconnect,
-            get_app_search_source
+            get_app_search_source,
+            server::attachment::upload_attachment,
+            server::attachment::get_attachment_by_ids,
+            server::attachment::delete_attachment,
+            server::transcription::transcription,
+            server::system_settings::get_system_settings,
+            extension::built_in::application::get_app_list,
+            extension::built_in::application::get_app_search_path,
+            extension::built_in::application::get_app_metadata,
+            extension::built_in::application::add_app_search_path,
+            extension::built_in::application::remove_app_search_path,
+            extension::built_in::application::reindex_applications,
+            extension::quicklink_link_arguments,
+            extension::list_extensions,
+            extension::enable_extension,
+            extension::disable_extension,
+            extension::set_extension_alias,
+            extension::register_extension_hotkey,
+            extension::unregister_extension_hotkey,
+            extension::is_extension_enabled,
+            extension::third_party::install::store::search_extension,
+            extension::third_party::install::store::extension_detail,
+            extension::third_party::install::store::install_extension_from_store,
+            extension::third_party::install::local_extension::install_local_extension,
+            extension::third_party::uninstall_extension,
+            settings::set_allow_self_signature,
+            settings::get_allow_self_signature,
+            assistant::ask_ai,
+            crate::common::document::open,
+            #[cfg(any(target_os = "macos", target_os = "windows"))]
+            extension::built_in::file_search::config::get_file_system_config,
+            #[cfg(any(target_os = "macos", target_os = "windows"))]
+            extension::built_in::file_search::config::set_file_system_config,
+            server::synthesize::synthesize,
+            util::file::get_file_icon,
+            setup::backend_setup,
+            util::app_lang::update_app_lang,
         ])
         .setup(|app| {
-            let registry = SearchSourceRegistry::default();
-
-            app.manage(registry); // Store registry in Tauri's app state
-            app.manage(server::websocket::WebSocketManager::default());
-
-            // Get app handle
-            let app_handle = app.handle().clone();
-
-            // Create a single Tokio runtime instance
-            let rt = RT::new().expect("Failed to create Tokio runtime");
-
-            // Use the runtime to spawn the async initialization tasks
-            let init_app_handle = app.handle().clone();
-            rt.spawn(async move {
-                init(&init_app_handle).await; // Pass a reference to `app_handle`
-            });
-
-            shortcut::enable_shortcut(&app);
-            // enable_tray(app);
-            enable_autostart(app);
-
             #[cfg(target_os = "macos")]
-            app.set_activation_policy(ActivationPolicy::Accessory);
-
-            // app.listen("theme-changed", move |event| {
-            //     if let Ok(payload) = serde_json::from_str::<ThemeChangedPayload>(event.payload()) {
-            //         // switch_tray_icon(app.app_handle(), payload.is_dark_mode);
-            //         println!("Theme changed: is_dark_mode = {}", payload.is_dark_mode);
-            //     }
-            // });
-
-            #[cfg(desktop)]
             {
-                #[cfg(any(windows, target_os = "linux"))]
-                {
-                    app.deep_link().register("coco")?;
-                    use tauri_plugin_deep_link::DeepLinkExt;
-                    app.deep_link().register_all()?;
-                }
+                log::trace!("hiding Dock icon on macOS");
+                app.set_activation_policy(tauri::ActivationPolicy::Accessory);
+                log::trace!("Dock icon should be hidden now");
             }
 
-            // app.deep_link().on_open_url(|event| {
-            //     dbg!(event.urls());
-            // });
 
-            let main_window = app.get_webview_window(MAIN_WINDOW_LABEL).unwrap();
-            let settings_window = app.get_webview_window(SETTINGS_WINDOW_LABEL).unwrap();
-            setup::default(app, main_window.clone(), settings_window.clone());
+            /* ----------- This code must be executed on the main thread and must not be relocated. ----------- */
+            let app_handle = app.app_handle();
+            let main_window = app_handle.get_webview_window(MAIN_WINDOW_LABEL).unwrap();
+            let settings_window = app_handle
+                .get_webview_window(SETTINGS_WINDOW_LABEL)
+                .unwrap();
+            let check_window = app_handle.get_webview_window(CHECK_WINDOW_LABEL).unwrap();
+            setup::default(
+                app_handle,
+                main_window.clone(),
+                settings_window.clone(),
+                check_window.clone(),
+            );
+            /* ----------- This code must be executed on the main thread and must not be relocated. ----------- */
 
             Ok(())
         })
         .on_window_event(|window, event| match event {
             WindowEvent::CloseRequested { api, .. } => {
-                dbg!("Close requested event received");
+                //dbg!("Close requested event received");
                 window.hide().unwrap();
                 api.prevent_close();
             }
@@ -196,10 +220,10 @@ pub fn run() {
             has_visible_windows,
             ..
         } => {
-            dbg!(
-                "Reopen event received: has_visible_windows = {}",
-                has_visible_windows
-            );
+            // dbg!(
+            //     "Reopen event received: has_visible_windows = {}",
+            //     has_visible_windows
+            // );
             if has_visible_windows {
                 return;
             }
@@ -210,80 +234,62 @@ pub fn run() {
     });
 }
 
-pub async fn init<R: Runtime>(app_handle: &AppHandle<R>) {
+pub async fn init(app_handle: &AppHandle) {
     // Await the async functions to load the servers and tokens
     if let Err(err) = load_or_insert_default_server(app_handle).await {
-        eprintln!("Failed to load servers: {}", err);
+        log::error!("Failed to load servers: {}", err);
     }
 
     if let Err(err) = load_servers_token(app_handle).await {
-        eprintln!("Failed to load server tokens: {}", err);
+        log::error!("Failed to load server tokens: {}", err);
     }
 
-    let coco_servers = server::servers::get_all_servers();
+    let coco_servers = server::servers::get_all_servers().await;
 
     // Get the registry from Tauri's state
-    let registry: State<SearchSourceRegistry> = app_handle.state::<SearchSourceRegistry>();
+    // let registry: State<SearchSourceRegistry> = app_handle.state::<SearchSourceRegistry>();
 
     for server in coco_servers {
-        let source = CocoSearchSource::new(server.clone(), Client::new());
-        registry.register_source(source).await;
+        crate::server::servers::try_register_server_to_search_source(app_handle.clone(), &server)
+            .await;
     }
-}
 
-async fn init_app_search_source<R: Runtime>(app_handle: &AppHandle<R>) -> Result<(), String> {
-    let application_search =
-        local::application::ApplicationSearchSource::new(app_handle.clone(), 1000f64).await?;
-
-    // Register the application search source
-    let registry = app_handle.state::<SearchSourceRegistry>();
-    registry.register_source(application_search).await;
-
-    Ok(())
+    extension::built_in::pizza_engine_runtime::start_pizza_engine_runtime().await;
 }
 
 #[tauri::command]
 async fn show_coco(app_handle: AppHandle) {
-    handle_open_coco(&app_handle);
+    if let Some(window) = app_handle.get_webview_window(MAIN_WINDOW_LABEL) {
+        move_window_to_active_monitor(&window);
+
+        let _ = window.show();
+        let _ = window.unminimize();
+        let _ = window.set_focus();
+
+        let _ = app_handle.emit("show-coco", ());
+    }
 }
 
 #[tauri::command]
-fn hide_coco(app: tauri::AppHandle) {
-    if let Some(window) = app.get_window(MAIN_WINDOW_LABEL) {
-        match window.is_visible() {
-            Ok(true) => {
-                if let Err(err) = window.hide() {
-                    eprintln!("Failed to hide the window: {}", err);
-                }
-            }
-            Ok(false) => {
-                println!("Window is already hidden.");
-            }
-            Err(err) => {
-                eprintln!("Failed to check window visibility: {}", err);
-            }
+async fn hide_coco(app: AppHandle) {
+    if let Some(window) = app.get_webview_window(MAIN_WINDOW_LABEL) {
+        if let Err(err) = window.hide() {
+            log::error!("Failed to hide the window: {}", err);
+        } else {
+            log::debug!("Window successfully hidden.");
         }
+    } else {
+        log::error!("Main window not found.");
     }
 }
 
-fn handle_open_coco(app: &AppHandle) {
-    if let Some(window) = app.get_window(MAIN_WINDOW_LABEL) {
-        move_window_to_active_monitor(&window);
-
-        window.show().unwrap();
-        window.set_visible_on_all_workspaces(true).unwrap();
-        window.set_always_on_top(true).unwrap();
-        window.set_focus().unwrap();
-    }
-}
-
-fn move_window_to_active_monitor<R: Runtime>(window: &Window<R>) {
-    dbg!("Moving window to active monitor");
+fn move_window_to_active_monitor(window: &WebviewWindow) {
+    //dbg!("Moving window to active monitor");
     // Try to get the available monitors, handle failure gracefully
     let available_monitors = match window.available_monitors() {
         Ok(monitors) => monitors,
         Err(e) => {
-            eprintln!("Failed to get monitors: {}", e);
+            log::error!("Failed to get monitors: {}", e);
             return;
         }
     };
@@ -292,7 +298,7 @@ fn move_window_to_active_monitor<R: Runtime>(window: &Window<R>) {
     let cursor_position = match window.cursor_position() {
         Ok(pos) => Some(pos),
         Err(e) => {
-            eprintln!("Failed to get cursor position: {}", e);
+            log::error!("Failed to get cursor position: {}", e);
             None
         }
     };
@@ -321,7 +327,7 @@ fn move_window_to_active_monitor<R: Runtime>(window: &Window<R>) {
     let monitor = match target_monitor.or_else(|| window.primary_monitor().ok().flatten()) {
         Some(monitor) => monitor,
         None => {
-            eprintln!("No monitor found!");
+            log::error!("No monitor found!");
             return;
         }
     };
@@ -331,7 +337,7 @@ fn move_window_to_active_monitor<R: Runtime>(window: &Window<R>) {
 
         if let Some(ref prev_name) = *previous_monitor_name {
             if name.to_string() == *prev_name {
-                println!("Currently on the same monitor");
+                log::debug!("Currently on the same monitor");
 
                 return;
             }
@@ -345,7 +351,7 @@ fn move_window_to_active_monitor<R: Runtime>(window: &Window<R>) {
     let window_size = match window.inner_size() {
         Ok(size) => size,
         Err(e) => {
-            eprintln!("Failed to get window size: {}", e);
+            log::error!("Failed to get window size: {}", e);
             return;
         }
     };
@@ -359,125 +365,19 @@ fn move_window_to_active_monitor<R: Runtime>(window: &Window<R>) {
 
     // Move the window to the new position
     if let Err(e) = window.set_position(PhysicalPosition::new(window_x, window_y)) {
-        eprintln!("Failed to move window: {}", e);
+        log::error!("Failed to move window: {}", e);
     }
 
     if let Some(name) = monitor.name() {
-        println!("Window moved to monitor: {}", name);
+        log::debug!("Window moved to monitor: {}", name);
 
         let mut previous_monitor = PREVIOUS_MONITOR_NAME.lock().unwrap();
         *previous_monitor = Some(name.to_string());
     }
 }
 
-fn handle_hide_coco(app: &AppHandle) {
-    if let Some(window) = app.get_window(MAIN_WINDOW_LABEL) {
-        if let Err(err) = window.hide() {
-            eprintln!("Failed to hide the window: {}", err);
-        } else {
-            println!("Window successfully hidden.");
-        }
-    } else {
-        eprintln!("Main window not found.");
-    }
-}
-
-fn enable_tray(app: &mut tauri::App) {
-    use tauri::{
-        image::Image,
-        menu::{MenuBuilder, MenuItem},
-        tray::TrayIconBuilder,
-    };
-
-    let quit_i = MenuItem::with_id(app, "quit", "Quit Coco", true, None::<&str>).unwrap();
-    let settings_i = MenuItem::with_id(app, "settings", "Settings...", true, None::<&str>).unwrap();
-    let open_i = MenuItem::with_id(app, "open", "Show Coco", true, None::<&str>).unwrap();
-    // let about_i = MenuItem::with_id(app, "about", "About Coco", true, None::<&str>).unwrap();
-    // let hide_i = MenuItem::with_id(app, "hide", "Hide Coco", true, None::<&str>).unwrap();
-
-    let menu = MenuBuilder::new(app)
-        .item(&open_i)
-        .separator()
-        // .item(&hide_i)
-        // .item(&about_i)
-        .item(&settings_i)
-        .separator()
-        .item(&quit_i)
-        .build()
-        .unwrap();
-
-    let _tray = TrayIconBuilder::with_id("tray")
-        .icon_as_template(true)
-        // .icon(app.default_window_icon().unwrap().clone())
-        .icon(
-            Image::from_bytes(include_bytes!("../assets/tray-mac.ico"))
-                .expect("Failed to load icon"),
-        )
-        .menu(&menu)
-        .on_menu_event(|app, event| match event.id.as_ref() {
-            "open" => {
-                handle_open_coco(app);
-            }
-            "hide" => {
-                handle_hide_coco(app);
-            }
-            "about" => {
-                let _ = app.emit("open_settings", "about");
-            }
-            "settings" => {
-                // windows failed to open second window, issue: https://github.com/tauri-apps/tauri/issues/11144 https://github.com/tauri-apps/tauri/issues/8196
-                //#[cfg(windows)]
-                let _ = app.emit("open_settings", "settings");
-
-                // #[cfg(not(windows))]
-                // open_settings(&app);
-            }
-            "quit" => {
-                println!("quit menu item was clicked");
-                app.exit(0);
-            }
-            _ => {
-                println!("menu item {:?} not handled", event.id);
-            }
-        })
-        .build(app)
-        .unwrap();
-}
-
-#[allow(dead_code)]
-fn open_settings(app: &tauri::AppHandle) {
-    use tauri::webview::WebviewBuilder;
-    println!("settings menu item was clicked");
-    let window = app.get_webview_window("settings");
-    if let Some(window) = window {
-        window.show().unwrap();
-        window.set_focus().unwrap();
-    } else {
-        let window = tauri::window::WindowBuilder::new(app, "settings")
-            .title("Settings Window")
-            .fullscreen(false)
-            .resizable(false)
-            .minimizable(false)
-            .maximizable(false)
-            .inner_size(800.0, 600.0)
-            .build()
-            .unwrap();
-
-        let webview_builder =
-            WebviewBuilder::new("settings", tauri::WebviewUrl::App("/ui/settings".into()));
-        let _webview = window
-            .add_child(
-                webview_builder,
-                tauri::LogicalPosition::new(0, 0),
-                window.inner_size().unwrap(),
-            )
-            .unwrap();
-    }
-}
-
 #[tauri::command]
-async fn get_app_search_source<R: Runtime>(app_handle: AppHandle<R>) -> Result<(), String> {
-    init_app_search_source(&app_handle).await?;
+async fn get_app_search_source(app_handle: AppHandle) -> Result<(), String> {
     let _ = server::connector::refresh_all_connectors(&app_handle).await;
     let _ = server::datasource::refresh_all_datasources(&app_handle).await;
 
@@ -486,5 +386,166 @@ async fn get_app_search_source<R: Runtime>(app_handle: AppHandle<R>) -> Result<(
 
 #[tauri::command]
 async fn show_settings(app_handle: AppHandle) {
-    open_settings(&app_handle);
+    log::debug!("settings menu item was clicked");
+    let window = app_handle
+        .get_webview_window(SETTINGS_WINDOW_LABEL)
+        .expect("we have a settings window");
+
+    window.show().unwrap();
+    window.unminimize().unwrap();
+    window.set_focus().unwrap();
+}
+
+#[tauri::command]
+async fn show_check(app_handle: AppHandle) {
+    log::debug!("check menu item was clicked");
+    let window = app_handle
+        .get_webview_window(CHECK_WINDOW_LABEL)
+        .expect("we have a check window");
+
+    window.show().unwrap();
+    window.unminimize().unwrap();
+    window.set_focus().unwrap();
+}
+
+#[tauri::command]
+async fn hide_check(app_handle: AppHandle) {
+    log::debug!("check window was closed");
+    let window = &app_handle
+        .get_webview_window(CHECK_WINDOW_LABEL)
+        .expect("we have a check window");
+
+    window.hide().unwrap();
+}
+
+/// Log format:
+///
+/// ```text
+/// [time] [log level] [file module:line] message
+/// ```
+///
+/// Example:
+///
+///
+/// ```text
+/// [05-11 17:00:00] [INF] [coco_lib:625] Coco-AI started
+/// ```
+fn set_up_tauri_logger() -> TauriPlugin<tauri::Wry> {
+    use log::Level;
+    use log::LevelFilter;
+    use tauri_plugin_log::Builder;
+
+    /// Coco-AI app's default log level.
+    const DEFAULT_LOG_LEVEL: LevelFilter = LevelFilter::Info;
+    const LOG_LEVEL_ENV_VAR: &str = "COCO_LOG";
+
+    fn format_log_level(level: Level) -> &'static str {
+        match level {
+            Level::Trace => "TRC",
+            Level::Debug => "DBG",
+            Level::Info => "INF",
+            Level::Warn => "WAR",
+            Level::Error => "ERR",
+        }
+    }
+
+    fn format_target_and_line(record: &log::Record) -> String {
+        let mut str = record.target().to_string();
+        if let Some(line) = record.line() {
+            str.push(':');
+            str.push_str(&line.to_string());
+        }
+
+        str
+    }
+
+    /// Allow us to configure dynamic log levels via environment variable `COCO_LOG`.
+    ///
+    /// Generally, it mirros the behavior of `env_logger`. Syntax: `COCO_LOG=[target][=][level][,...]`
+    ///
+    /// * If this environment variable is not set, use the default log level.
+    /// * If it is set, respect it:
+    ///
+    /// * `COCO_LOG=coco_lib` turns on all logging for the `coco_lib` module, which is
+    ///   equivalent to `COCO_LOG=coco_lib=trace`
+    /// * `COCO_LOG=trace` turns on all logging for the application, regardless of its name
+    /// * `COCO_LOG=TRACE` turns on all logging for the application, regardless of its name (same as previous)
+    /// * `COCO_LOG=reqwest=debug` turns on debug logging for `reqwest`
+    /// * `COCO_LOG=trace,tauri=off` turns on all the logging except for the logs come from `tauri`
+    /// * `COCO_LOG=off` turns off all logging for the application
+    /// * `COCO_LOG=` Since the value is empty, turns off all logging for the application as well
+    fn dynamic_log_level(mut builder: Builder) -> Builder {
+        let Some(log_levels) = std::env::var_os(LOG_LEVEL_ENV_VAR) else {
+            return builder.level(DEFAULT_LOG_LEVEL);
+        };
+
+        builder = builder.level(LevelFilter::Off);
+
+        let log_levels = log_levels.into_string().unwrap_or_else(|e| {
+            panic!(
+                "The value '{}' set in environment varaible '{}' is not UTF-8 encoded",
+                // Cannot use `.display()` here becuase that requires MSRV 1.87.0
+                e.to_string_lossy(),
+                LOG_LEVEL_ENV_VAR
+            )
+        });
+
+        // COCO_LOG=[target][=][level][,...]
+        let target_log_levels = log_levels.split(',');
+        for target_log_level in target_log_levels {
+            #[allow(clippy::collapsible_else_if)]
+            if let Some(char_index) = target_log_level.chars().position(|c| c == '=') {
+                let (target, equal_sign_and_level) = target_log_level.split_at(char_index);
+                // Remove the equal sign, we know it takes 1 byte
+                let level = &equal_sign_and_level[1..];
+
+                if let Ok(level) = level.parse::<LevelFilter>() {
+                    // Here we have to call `.to_string()` because `Cow<'static, str>` requires `&'static str`
+                    builder = builder.level_for(target.to_string(), level);
+                } else {
+                    panic!(
+                        "log level '{}' set in '{}={}' is invalid",
+                        level, target, level
+                    );
+                }
+            } else {
+                if let Ok(level) = target_log_level.parse::<LevelFilter>() {
+                    // This is a level
+                    builder = builder.level(level);
+                } else {
+                    // This is a target, enable all the logging
+                    //
+                    // Here we have to call `.to_string()` because `Cow<'static, str>` requires `&'static str`
+                    builder = builder.level_for(target_log_level.to_string(), LevelFilter::Trace);
+                }
+            }
+        }
+
+        builder
+    }
+
+    // When running the built binary, set `COCO_LOG` to `coco_lib=trace` to capture all logs
+    // that come from Coco in the log file, which helps with debugging.
+    if !tauri::is_dev() {
+        // We have absolutely no guarantee that we (We have control over the Rust
+        // code, but definitely no idea about the libc C code, all the shared objects
+        // that we will link) will not concurrently read/write `envp`, so just use unsafe.
+        unsafe {
+            std::env::set_var("COCO_LOG", "coco_lib=trace");
+        }
+    }
+
+    let mut builder = tauri_plugin_log::Builder::new();
+    builder = builder.format(|out, message, record| {
+        let now = chrono::Local::now().format("%m-%d %H:%M:%S");
+        let level = format_log_level(record.level());
+        let target_and_line = format_target_and_line(record);
+        out.finish(format_args!(
+            "[{}] [{}] [{}] {}",
+            now, level, target_and_line, message
+        ));
+    });
+    builder = dynamic_log_level(builder);
+
+    builder.build()
 }

src-tauri/src/local/application.rs

@@ -1,158 +0,0 @@
-use crate::common::document::{DataSourceReference, Document};
-use crate::common::search::{QueryResponse, QuerySource, SearchQuery};
-use crate::common::traits::{SearchError, SearchSource};
-use crate::local::LOCAL_QUERY_SOURCE_TYPE;
-use applications::{AppInfo, AppInfoContext};
-use async_trait::async_trait;
-use base64::encode;
-use fuzzy_prefix_search::Trie;
-use std::collections::HashMap;
-use std::fs;
-use std::path::{Path, PathBuf};
-use tauri::{AppHandle, Runtime};
-use tauri_plugin_fs_pro::{icon, name};
-
-pub struct ApplicationSearchSource {
-    base_score: f64,
-    icons: HashMap<String, PathBuf>,
-    application_paths: Trie<String>,
-}
-
-impl ApplicationSearchSource {
-    pub async fn new<R: Runtime>(
-        app_handle: AppHandle<R>,
-        base_score: f64,
-    ) -> Result<Self, String> {
-        let application_paths = Trie::new();
-        let mut icons = HashMap::new();
-
-        let mut ctx = AppInfoContext::new(vec![]);
-        ctx.refresh_apps().map_err(|err| err.to_string())?; // must refresh apps before getting them
-        let apps = ctx.get_all_apps();
-
-        for app in &apps {
-            let path = if cfg!(target_os = "macos") {
-                app.app_desktop_path.clone()
-            } else {
-                app.app_path_exe
-                    .clone()
-                    .unwrap_or(PathBuf::from("Path not found"))
-            };
-            let search_word = name(path.clone()).await;
-            let icon = icon(app_handle.clone(), path.clone(), Some(256))
-                .await
-                .map_err(|err| err.to_string())?;
-            let path_string = path.to_string_lossy().into_owned();
-
-            if search_word.is_empty() || search_word.eq("coco-ai") {
-                continue;
-            }
-
-            application_paths.insert(&search_word, path_string.clone());
-            icons.insert(path_string, icon);
-        }
-
-        Ok(ApplicationSearchSource {
-            base_score,
-            icons,
-            application_paths,
-        })
-    }
-}
-
-#[async_trait]
-impl SearchSource for ApplicationSearchSource {
-    fn get_type(&self) -> QuerySource {
-        QuerySource {
-            r#type: LOCAL_QUERY_SOURCE_TYPE.into(),
-            name: hostname::get()
-                .unwrap_or("My Computer".into())
-                .to_string_lossy()
-                .into(),
-            id: "local_applications".into(),
-        }
-    }
-
-    async fn search(&self, query: SearchQuery) -> Result<QueryResponse, SearchError> {
-        let query_string = query
-            .query_strings
-            .get("query")
-            .unwrap_or(&"".to_string())
-            .to_lowercase();
-
-        if query_string.is_empty() {
-            return Ok(QueryResponse {
-                source: self.get_type(),
-                hits: Vec::new(),
-                total_hits: 0,
-            });
-        }
-
-        let mut total_hits = 0;
-        let mut hits = Vec::new();
-
-        let mut results = self
-            .application_paths
-            .search_within_distance_scored(&query_string, 3);
-
-        // Check for NaN or extreme score values and handle them properly
-        results.sort_by(|a, b| {
-            // If either score is NaN, consider them equal (you can customize this logic as needed)
-            if a.score.is_nan() || b.score.is_nan() {
-                std::cmp::Ordering::Equal
-            } else {
-                // Otherwise, compare the scores as usual
-                b.score
-                    .partial_cmp(&a.score)
-                    .unwrap_or(std::cmp::Ordering::Equal)
-            }
-        });
-
-        if !results.is_empty() {
-            for result in results {
-                let file_name_str = result.word;
-                let file_path_str = result.data.get(0).unwrap().to_string();
-                let file_path = PathBuf::from(file_path_str.clone());
-                let cleaned_file_name = name(file_path).await;
-                total_hits += 1;
-                let mut doc = Document::new(
-                    Some(DataSourceReference {
-                        r#type: Some(LOCAL_QUERY_SOURCE_TYPE.into()),
-                        name: Some("Applications".into()),
-                        id: Some(file_name_str.clone()),
-                    }),
-                    file_path_str.clone(),
-                    "Application".to_string(),
-                    cleaned_file_name,
-                    file_path_str.clone(),
-                );
-
-                // Attach icon if available
-                if let Some(icon_path) = self.icons.get(file_path_str.as_str()) {
-                    // doc.icon = Some(format!("file://{}", icon_path.to_string_lossy()));
-                    // dbg!(&doc.icon);
-                    if let Ok(icon_data) = read_icon_and_encode(icon_path) {
-                        doc.icon = Some(format!("data:image/png;base64,{}", icon_data));
-                    }
-                }
-
-                hits.push((doc, self.base_score + result.score as f64));
-            }
-        }
-
-        Ok(QueryResponse {
-            source: self.get_type(),
-            hits,
-            total_hits,
-        })
-    }
-}
-
-// Function to read the icon file and convert it to base64
-fn read_icon_and_encode(icon_path: &Path) -> Result<String, std::io::Error> {
-    // Read the icon file as binary data
-    let icon_data = fs::read(icon_path)?;
-
-    // Encode the data to base64
-    Ok(encode(&icon_data))
-}

src-tauri/src/local/mod.rs

@@ -1,4 +0,0 @@
-pub mod application;
-pub mod file_system;
-
-pub const LOCAL_QUERY_SOURCE_TYPE: &str = "local";

src-tauri/src/main.rs

@@ -1,5 +1,112 @@
 // Prevents additional console window on Windows in release, DO NOT REMOVE!!
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+use std::fs::OpenOptions;
+use std::io::Write;
+use std::path::PathBuf;
+
+/// Helper function to return the log directory.
+///
+/// This should return the same value as `tauri_app_handle.path().app_log_dir().unwrap()`.
+fn app_log_dir() -> PathBuf {
+    // This function `app_log_dir()` is for the panic hook, which should be set
+    // before Tauri performs any initialization. At that point, we do not have
+    // access to the identifier provided by Tauri, so we need to define our own
+    // one here.
+    //
+    // NOTE: If you update identifier in the following files, update this one
+    // as well!
+    //
+    // src-tauri/tauri.linux.conf.json
+    // src-tauri/Entitlements.plist
+    // src-tauri/tauri.conf.json
+    // src-tauri/Info.plist
+    const IDENTIFIER: &str = "rs.coco.app";
+
+    #[cfg(target_os = "macos")]
+    let path = dirs::home_dir()
+        .expect("cannot find the home directory, Coco should never run in such a environment")
+        .join("Library/Logs")
+        .join(IDENTIFIER);
+
+    #[cfg(not(target_os = "macos"))]
+    let path = dirs::data_local_dir()
+        .expect("app local dir is None, we should not encounter this")
+        .join(IDENTIFIER)
+        .join("logs");
+
+    path
+}
+
+/// Set up panic hook to log panic information to a file
+fn setup_panic_hook() {
+    std::panic::set_hook(Box::new(|panic_info| {
+        let timestamp = chrono::Local::now();
+        // "%Y-%m-%d %H:%M:%S"
+        //
+        // I would like to use the above format, but Windows does not allow that
+        // and complains with OS error 123.
+        let datetime_str = timestamp.format("%Y-%m-%d-%H-%M-%S").to_string();
+
+        let log_dir = app_log_dir();
+
+        // Ensure the log directory exists
+        if let Err(e) = std::fs::create_dir_all(&log_dir) {
+            eprintln!("Panic hook error: failed to create log directory: {}", e);
+            return;
+        }
+
+        let panic_file = log_dir.join(format!("{}_rust_panic.log", datetime_str));
+
+        // Prepare panic information
+        let panic_message = if let Some(s) = panic_info.payload().downcast_ref::<&str>() {
+            s.to_string()
+        } else if let Some(s) = panic_info.payload().downcast_ref::<String>() {
+            s.clone()
+        } else {
+            "Unknown panic message".to_string()
+        };
+
+        let location = if let Some(location) = panic_info.location() {
+            format!(
+                "{}:{}:{}",
+                location.file(),
+                location.line(),
+                location.column()
+            )
+        } else {
+            "Unknown location".to_string()
+        };
+
+        // Use `force_capture()` instead of `capture()` as we want backtrace
+        // regardless of whether the corresponding env vars are set or not.
+        let backtrace = std::backtrace::Backtrace::force_capture();
+
+        let panic_log = format!(
+            "Time: [{}]\nLocation: [{}]\nMessage: [{}]\nBacktrace: \n{}",
+            datetime_str, location, panic_message, backtrace
+        );
+
+        // Write to panic file
+        match OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open(&panic_file)
+        {
+            Ok(mut file) => {
+                if let Err(e) = writeln!(file, "{}", panic_log) {
+                    eprintln!("Panic hook error: Failed to write panic to file: {}", e);
+                }
+            }
+            Err(e) => {
+                eprintln!("Panic hook error: Failed to open panic log file: {}", e);
+            }
+        }
+    }));
+}
+
 fn main() {
+    // Panic hook setup should be the first thing to do, everything could panic!
+    setup_panic_hook();
     coco_lib::run();
 }

src-tauri/src/search/mod.rs

@@ -1,119 +1,275 @@
+use crate::common::error::SearchError;
 use crate::common::register::SearchSourceRegistry;
 use crate::common::search::{
     FailedRequest, MultiSourceQueryResponse, QueryHits, QuerySource, SearchQuery,
 };
-use crate::common::traits::SearchError;
-use futures::stream::FuturesUnordered;
+use crate::common::traits::SearchSource;
+use crate::server::servers::logout_coco_server;
+use crate::server::servers::mark_server_as_offline;
+use function_name::named;
 use futures::StreamExt;
+use futures::stream::FuturesUnordered;
+use reqwest::StatusCode;
+use std::cmp::Reverse;
 use std::collections::HashMap;
 use std::collections::HashSet;
-use tauri::{AppHandle, Manager, Runtime};
-use tokio::time::{timeout, Duration};
+use std::sync::Arc;
+use tauri::{AppHandle, Manager};
+use tokio::time::{Duration, timeout};
 
+#[named]
 #[tauri::command]
-pub async fn query_coco_fusion<R: Runtime>(
-    app_handle: AppHandle<R>,
+pub async fn query_coco_fusion(
+    tauri_app_handle: AppHandle,
     from: u64,
     size: u64,
     query_strings: HashMap<String, String>,
+    query_timeout: u64,
 ) -> Result<MultiSourceQueryResponse, SearchError> {
-    let search_sources = app_handle.state::<SearchSourceRegistry>();
+    let opt_query_source_id = query_strings.get("querysource");
+    let search_sources = tauri_app_handle.state::<SearchSourceRegistry>();
+    let query_source_list = search_sources.get_sources().await;
+    let timeout_duration = Duration::from_millis(query_timeout);
+    let search_query = SearchQuery::new(from, size, query_strings.clone());
+
+    log::debug!(
+        "{}() invoked with parameters: from: [{}], size: [{}], query_strings: [{:?}], timeout: [{:?}]",
+        function_name!(),
+        from,
+        size,
+        query_strings,
+        timeout_duration
+    );
+
+    // Dispatch to different `query_coco_fusion_xxx()` functions.
+    if let Some(query_source_id) = opt_query_source_id {
+        query_coco_fusion_single_query_source(
+            tauri_app_handle,
+            query_source_list,
+            query_source_id.clone(),
+            timeout_duration,
+            search_query,
+        )
+        .await
+    } else {
+        query_coco_fusion_multi_query_sources(
+            tauri_app_handle,
+            query_source_list,
+            timeout_duration,
+            search_query,
+        )
+        .await
+    }
+}
+
+/// Query only 1 query source.
+///
+/// The logic here is much simpler than `query_coco_fusion_multi_query_sources()`
+/// as we don't need to re-rank due to fact that this does not involve multiple
+/// query sources.
+async fn query_coco_fusion_single_query_source(
+    tauri_app_handle: AppHandle,
+    mut query_source_list: Vec<Arc<dyn SearchSource>>,
+    id_of_query_source_to_query: String,
+    timeout_duration: Duration,
+    search_query: SearchQuery,
+) -> Result<MultiSourceQueryResponse, SearchError> {
+    // If this query source ID is specified, we only query this query source.
+    log::debug!(
+        "parameter [querysource={}] specified, will only query this query source",
+        id_of_query_source_to_query
+    );
+
+    let opt_query_source_trait_object_index = query_source_list
+        .iter()
+        .position(|query_source| query_source.get_type().id == id_of_query_source_to_query);
+
+    let Some(query_source_trait_object_index) = opt_query_source_trait_object_index else {
+        // It is possible (an edge case) that the frontend invokes `query_coco_fusion()`
+        // with a querysource that does not exist in the source list:
+        //
+        // 1. Search applications
+        // 2. Navigate to the application sub page
+        // 3. Disable the application extension in settings, which removes this
+        //    query source from the list
+        // 4. hide the search window
+        // 5. Re-open the search window, you will still be in the sub page, type to search
+        //    something
+        //
+        // The application query source is not in the source list because the extension
+        // was disabled and thus removed from the query sources, but the last
+        // search is indeed invoked with parameter `querysource=application`.
+        return Ok(MultiSourceQueryResponse {
+            failed: Vec::new(),
+            hits: Vec::new(),
+            total_hits: 0,
+        });
+    };
+
+    let query_source_trait_object = query_source_list.remove(query_source_trait_object_index);
+    let query_source = query_source_trait_object.get_type();
+    let search_fut = query_source_trait_object.search(tauri_app_handle.clone(), search_query);
+    let timeout_result = timeout(timeout_duration, search_fut).await;
+
+    let mut failed_requests: Vec<FailedRequest> = Vec::new();
+    let mut hits = Vec::new();
+    let mut total_hits = 0;
+
+    match timeout_result {
+        // Ignore the `_timeout` variable as it won't provide any useful debugging information.
+        Err(_timeout) => {
+            log::warn!(
+                "searching query source [{}] timed out, skip this request",
+                query_source.id
+            );
+        }
+        Ok(query_result) => match query_result {
+            Ok(response) => {
+                total_hits = response.total_hits;
+
+                for (document, score) in response.hits {
+                    log::debug!(
+                        "document from query source [{}]: ID [{}], title [{:?}], score [{}]",
+                        response.source.id,
+                        document.id,
+                        document.title,
+                        score
+                    );
+
+                    let query_hit = QueryHits {
+                        source: Some(response.source.clone()),
+                        score,
+                        document,
+                    };
+
+                    hits.push(query_hit);
+                }
+            }
+            Err(search_error) => {
+                query_coco_fusion_handle_failed_request(
+                    tauri_app_handle.clone(),
+                    &mut failed_requests,
+                    query_source,
+                    search_error,
+                )
+                .await;
+            }
+        },
+    }
+
+    Ok(MultiSourceQueryResponse {
+        failed: failed_requests,
+        hits,
+        total_hits,
+    })
+}
+
+async fn query_coco_fusion_multi_query_sources(
+    tauri_app_handle: AppHandle,
+    query_source_trait_object_list: Vec<Arc<dyn SearchSource>>,
+    timeout_duration: Duration,
+    search_query: SearchQuery,
+) -> Result<MultiSourceQueryResponse, SearchError> {
+    log::debug!(
+        "will query query sources {:?}",
+        query_source_trait_object_list
+            .iter()
+            .map(|search_source| search_source.get_type().id.clone())
+            .collect::<Vec<String>>()
+    );
+
+    let query_keyword = search_query
+        .query_strings
+        .get("query")
+        .unwrap_or(&"".to_string())
+        .clone();
+    let size = search_query.size;
 
-    let sources_future = search_sources.get_sources();
     let mut futures = FuturesUnordered::new();
-    let mut sources = HashMap::new();
 
-    let sources_list = sources_future.await;
+    let query_source_list_len = query_source_trait_object_list.len();
+    for query_source_trait_object in query_source_trait_object_list {
+        let query_source = query_source_trait_object.get_type().clone();
+        let tauri_app_handle_clone = tauri_app_handle.clone();
+        let search_query_clone = search_query.clone();
 
-    // Time limit for each query
-    let timeout_duration = Duration::from_millis(500); //TODO, settings
-
-    // Push all queries into futures
-    for query_source in sources_list {
-        let query_source_type = query_source.get_type().clone();
-        sources.insert(query_source_type.id.clone(), query_source_type);
-
-        let query = SearchQuery::new(from, size, query_strings.clone());
-        let query_source_clone = query_source.clone(); // Clone Arc to avoid ownership issues
-
-        futures.push(tokio::spawn(async move {
-            // Timeout each query execution
-            timeout(timeout_duration, async {
-                query_source_clone.search(query).await
-            })
-                .await
-        }));
+        futures.push(async move {
+            (
+                // Store `query_source` as part of future for debugging purposes.
+                query_source,
+                timeout(timeout_duration, async {
+                    query_source_trait_object
+                        .search(tauri_app_handle_clone, search_query_clone)
+                        .await
+                })
+                .await,
+            )
+        });
     }
 
     let mut total_hits = 0;
+    let mut need_rerank = true; //TODO set default to false when boost supported in Pizza
     let mut failed_requests = Vec::new();
     let mut all_hits: Vec<(String, QueryHits, f64)> = Vec::new();
     let mut hits_per_source: HashMap<String, Vec<(QueryHits, f64)>> = HashMap::new();
 
-    while let Some(result) = futures.next().await {
-        match result {
-            Ok(Ok(Ok(response))) => {
-                total_hits += response.total_hits;
-                let source_id = response.source.id.clone();
+    if query_source_list_len > 1 {
+        need_rerank = true; // If we have more than one source, we need to rerank the hits
+    }
 
-                for (doc, score) in response.hits {
-                    let query_hit = QueryHits {
-                        source: Some(response.source.clone()),
-                        score,
-                        document: doc,
-                    };
+    while let Some((query_source, timeout_result)) = futures.next().await {
+        match timeout_result {
+            // Ignore the `_timeout` variable as it won't provide any useful debugging information.
+            Err(_timeout) => {
+                log::warn!(
+                    "searching query source [{}] timed out, skip this request",
+                    query_source.id
+                );
+            }
+            Ok(query_result) => match query_result {
+                Ok(response) => {
+                    total_hits += response.total_hits;
+                    let source_id = response.source.id.clone();
 
-                    all_hits.push((source_id.clone(), query_hit.clone(), score));
+                    for (document, score) in response.hits {
+                        log::debug!(
+                            "document from query source [{}]: ID [{}], title [{:?}], score [{}]",
+                            response.source.id,
+                            document.id,
+                            document.title,
+                            score
+                        );
 
-                    hits_per_source
-                        .entry(source_id.clone())
-                        .or_insert_with(Vec::new)
-                        .push((query_hit, score));
+                        let query_hit = QueryHits {
+                            source: Some(response.source.clone()),
+                            score,
+                            document,
+                        };
+
+                        all_hits.push((source_id.clone(), query_hit.clone(), score));
+
+                        hits_per_source
+                            .entry(source_id.clone())
+                            .or_insert_with(Vec::new)
+                            .push((query_hit, score));
+                    }
                 }
-            }
-            Ok(Err(err)) => {
-                failed_requests.push(FailedRequest {
-                    source: QuerySource {
-                        r#type: "N/A".into(),
-                        name: "N/A".into(),
-                        id: "N/A".into(),
-                    },
-                    status: 0,
-                    error: Some(err.to_string()),
-                    reason: None,
-                });
-            }
-            // Timeout reached, skip this request
-            Ok(_) => {
-                failed_requests.push(FailedRequest {
-                    source: QuerySource {
-                        r#type: "N/A".into(),
-                        name: "N/A".into(),
-                        id: "N/A".into(),
-                    },
-                    status: 0,
-                    error: Some("Query source timed out".to_string()),
-                    reason: None,
-                });
-            }
-            Err(_) => {
-                failed_requests.push(FailedRequest {
-                    source: QuerySource {
-                        r#type: "N/A".into(),
-                        name: "N/A".into(),
-                        id: "N/A".into(),
-                    },
-                    status: 0,
-                    error: Some("Task panicked".to_string()),
-                    reason: None,
-                });
-            }
+                Err(search_error) => {
+                    query_coco_fusion_handle_failed_request(
+                        tauri_app_handle.clone(),
+                        &mut failed_requests,
+                        query_source,
+                        search_error,
+                    )
+                    .await;
+                }
+            },
         }
     }
 
     // Sort hits within each source by score (descending)
     for hits in hits_per_source.values_mut() {
-        hits.sort_by(|a, b| b.1.partial_cmp(&a.1).unwrap_or(std::cmp::Ordering::Equal));
+        hits.sort_by(|a, b| b.1.partial_cmp(&a.1).unwrap_or(std::cmp::Ordering::Greater));
     }
 
     let total_sources = hits_per_source.len();
@@ -129,16 +285,71 @@ pub async fn query_coco_fusion<R: Runtime>(
     // Distribute hits fairly across sources
     for (_source_id, hits) in &mut hits_per_source {
         let take_count = hits.len().min(max_hits_per_source);
-        for (doc, _) in hits.drain(0..take_count) {
+        for (doc, score) in hits.drain(0..take_count) {
             if !seen_docs.contains(&doc.document.id) {
                 seen_docs.insert(doc.document.id.clone());
+                log::debug!(
+                    "collect doc: {}, {:?}, {}",
+                    doc.document.id,
+                    doc.document.title,
+                    score
+                );
                 final_hits.push(doc);
             }
         }
     }
 
-    // If we still need more hits, take the highest-scoring remaining ones
-    if final_hits.len() < size as usize {
+    log::debug!("final hits: {:?}", final_hits.len());
+
+    let mut unique_sources = HashSet::new();
+    for hit in &final_hits {
+        if let Some(source) = &hit.source {
+            if source.id != crate::extension::built_in::calculator::DATA_SOURCE_ID {
+                unique_sources.insert(&source.id);
+            }
+        }
+    }
+
+    log::debug!(
+        "Multiple sources found: {:?}, no rerank needed",
+        unique_sources
+    );
+
+    if unique_sources.len() < 1 {
+        need_rerank = false; // If we have hits from multiple sources, we don't need to rerank
+    }
+
+    if need_rerank && final_hits.len() > 1 {
+        // Precollect (index, title)
+        let titles_to_score: Vec<(usize, &str)> = final_hits
+            .iter()
+            .enumerate()
+            .filter_map(|(idx, hit)| {
+                let source = hit.source.as_ref()?;
+                let title = hit.document.title.as_deref()?;
+
+                if source.id != crate::extension::built_in::calculator::DATA_SOURCE_ID {
+                    Some((idx, title))
+                } else {
+                    None
+                }
+            })
+            .collect();
+
+        // Score them
+        let scored_hits = boosted_levenshtein_rerank(query_keyword.as_str(), titles_to_score);
+
+        // Sort descending by score
+        let mut scored_hits = scored_hits;
+        scored_hits.sort_by_key(|&(_, score)| Reverse((score * 1000.0) as u64));
+
+        // Apply new scores to final_hits
+        for (idx, score) in scored_hits.into_iter().take(size as usize) {
+            final_hits[idx].score = score;
+        }
+    } else if final_hits.len() < size as usize {
+        // If we still need more hits, take the highest-scoring remaining ones
+
         let remaining_needed = size as usize - final_hits.len();
 
         // Sort all hits by score descending, removing duplicates by document ID
@@ -168,9 +379,96 @@ pub async fn query_coco_fusion<R: Runtime>(
             .unwrap_or(std::cmp::Ordering::Equal)
     });
 
+    if final_hits.len() < 5 {
+        //TODO: Add a recommendation system to suggest more sources
+        log::info!(
+            "Less than 5 hits found, consider using recommendation to find more suggestions."
+        );
+        //local: recent history, local extensions
+        //remote: ai agents, quick links, other tasks, managed by server
+    }
+
     Ok(MultiSourceQueryResponse {
         failed: failed_requests,
         hits: final_hits,
         total_hits,
     })
 }
+
+fn boosted_levenshtein_rerank(query: &str, titles: Vec<(usize, &str)>) -> Vec<(usize, f64)> {
+    use strsim::levenshtein;
+
+    let query_lower = query.to_lowercase();
+
+    titles
+        .into_iter()
+        .map(|(idx, title)| {
+            let mut score = 0.0;
+
+            if title.contains(query) {
+                score += 0.4;
+            } else if title.to_lowercase().contains(&query_lower) {
+                score += 0.2;
+            }
+
+            let dist = levenshtein(&query_lower, &title.to_lowercase());
+            let max_len = query_lower.len().max(title.len());
+            if max_len > 0 {
+                score += (1.0 - (dist as f64 / max_len as f64)) as f32;
+            }
+
+            (idx, score.min(1.0) as f64)
+        })
+        .collect()
+}
+
+/// Helper function to handle a failed request.
+///
+/// Extracted as a function because `query_coco_fusion_single_query_source()` and
+/// `query_coco_fusion_multi_query_sources()` share the same error handling logic.
+async fn query_coco_fusion_handle_failed_request(
+    tauri_app_handle: AppHandle,
+    failed_requests: &mut Vec<FailedRequest>,
+    query_source: QuerySource,
+    search_error: SearchError,
+) {
+    log::error!(
+        "searching query source [{}] failed, error [{}]",
+        query_source.id,
+        search_error
+    );
+
+    let mut status_code_num: u16 = 0;
+
+    if let SearchError::HttpError {
+        status_code: opt_status_code,
+        msg: _,
+    } = search_error
+    {
+        if let Some(status_code) = opt_status_code {
+            status_code_num = status_code.as_u16();
+            if status_code != StatusCode::OK {
+                if status_code == StatusCode::UNAUTHORIZED {
+                    // This Coco server is unavailable. In addition to marking it as
+                    // unavailable, we need to log out because the status code is 401.
+                    logout_coco_server(tauri_app_handle.clone(), query_source.id.to_string()).await.unwrap_or_else(|e| {
+                        panic!(
+                          "the search request to Coco server [id {}, name {}] failed with status code {}, the login token is invalid, we are trying to log out, but failed with error [{}]", 
+                          query_source.id, query_source.name, StatusCode::UNAUTHORIZED, e
+                        );
+                    })
+                } else {
+                    // This Coco server is unavailable
+                    mark_server_as_offline(tauri_app_handle.clone(), &query_source.id).await;
+                }
+            }
+        }
+    }
+
+    failed_requests.push(FailedRequest {
+        source: query_source,
+        status: status_code_num,
+        error: Some(search_error.to_string()),
+        reason: None,
+    });
+}

src-tauri/src/server/attachment.rs

@@ -0,0 +1,113 @@
+use super::servers::{get_server_by_id, get_server_token};
+use crate::common::http::get_response_body_text;
+use crate::server::http_client::HttpClient;
+use reqwest::multipart::{Form, Part};
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+use std::{collections::HashMap, path::PathBuf};
+use tauri::command;
+use tokio::fs::File;
+use tokio_util::codec::{BytesCodec, FramedRead};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct UploadAttachmentResponse {
+    pub acknowledged: bool,
+    pub attachments: Vec<String>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct DeleteAttachmentResponse {
+    pub _id: String,
+    pub result: String,
+}
+
+#[command]
+pub async fn upload_attachment(
+    server_id: String,
+    file_paths: Vec<PathBuf>,
+) -> Result<UploadAttachmentResponse, String> {
+    let mut form = Form::new();
+
+    for file_path in file_paths {
+        let file = File::open(&file_path)
+            .await
+            .map_err(|err| err.to_string())?;
+
+        let stream = FramedRead::new(file, BytesCodec::new());
+        let file_name = file_path
+            .file_name()
+            .and_then(|n| n.to_str())
+            .ok_or("Invalid filename")?;
+
+        let part =
+            Part::stream(reqwest::Body::wrap_stream(stream)).file_name(file_name.to_string());
+
+        form = form.part("files", part);
+    }
+
+    let server = get_server_by_id(&server_id)
+        .await
+        .ok_or("Server not found")?;
+    let url = HttpClient::join_url(&server.endpoint, &format!("attachment/_upload"));
+
+    let token = get_server_token(&server_id).await;
+    let mut headers = HashMap::new();
+    if let Some(token) = token {
+        headers.insert("X-API-TOKEN".to_string(), token.access_token);
+    }
+
+    let client = reqwest::Client::new();
+    let response = client
+        .post(url)
+        .multipart(form)
+        .headers((&headers).try_into().map_err(|err| format!("{}", err))?)
+        .send()
+        .await
+        .map_err(|err| err.to_string())?;
+
+    let body = get_response_body_text(response).await?;
+
+    serde_json::from_str::<UploadAttachmentResponse>(&body)
+        .map_err(|e| format!("Failed to parse upload response: {}", e))
+}
+
+#[command]
+pub async fn get_attachment_by_ids(
+    server_id: String,
+    attachments: Vec<String>,
+) -> Result<Value, String> {
+    println!("get_attachment_by_ids server_id: {}", server_id);
+    println!("get_attachment_by_ids attachments: {:?}", attachments);
+
+    let request_body = serde_json::json!({
+        "attachments": attachments
+    });
+    let body = reqwest::Body::from(serde_json::to_string(&request_body).unwrap());
+
+    let response = HttpClient::post(&server_id, "/attachment/_search", None, Some(body))
+        .await
+        .map_err(|e| format!("Request error: {}", e))?;
+
+    let body = get_response_body_text(response).await?;
+
+    serde_json::from_str::<Value>(&body)
+        .map_err(|e| format!("Failed to parse attachment response: {}", e))
+}
+
+#[command]
+pub async fn delete_attachment(server_id: String, id: String) -> Result<bool, String> {
+    let response = HttpClient::delete(&server_id, &format!("/attachment/{}", id), None, None)
+        .await
+        .map_err(|e| format!("Request error: {}", e))?;
+
+    let body = get_response_body_text(response).await?;
+
+    let parsed: DeleteAttachmentResponse = serde_json::from_str(&body)
+        .map_err(|e| format!("Failed to parse delete response: {}", e))?;
+
+    parsed
+        .result
+        .eq("deleted")
+        .then_some(true)
+        .ok_or_else(|| "Delete operation was not successful".to_string())
+}

src-tauri/src/server/auth.rs

@@ -1,94 +1,51 @@
-use crate::common::auth::RequestAccessTokenResponse;
-use crate::common::register::SearchSourceRegistry;
 use crate::common::server::ServerAccessToken;
-use crate::server::http_client::HttpClient;
 use crate::server::profile::get_user_profiles;
-use crate::server::search::CocoSearchSource;
-use crate::server::servers::{get_server_by_id, persist_servers, persist_servers_token, save_access_token, save_server};
-use reqwest::{Client, StatusCode};
-use std::collections::HashMap;
-use tauri::{AppHandle, Manager, Runtime};
+use crate::server::servers::{
+    get_server_by_id, persist_servers, persist_servers_token, save_access_token, save_server,
+    try_register_server_to_search_source,
+};
+use tauri::AppHandle;
+
+#[allow(dead_code)]
 fn request_access_token_url(request_id: &str) -> String {
     // Remove the endpoint part and keep just the path for the request
     format!("/auth/request_access_token?request_id={}", request_id)
 }
 
 #[tauri::command]
-pub async fn handle_sso_callback<R: Runtime>(
-    app_handle: AppHandle<R>,
+pub async fn handle_sso_callback(
+    app_handle: AppHandle,
     server_id: String,
     request_id: String,
     code: String,
 ) -> Result<(), String> {
     // Retrieve the server details using the server ID
-    let server = get_server_by_id(&server_id);
+    let server = get_server_by_id(&server_id).await;
 
+    let expire_in = 3600; // TODO, need to update to actual expire_in value
     if let Some(mut server) = server {
-        // Prepare the URL for requesting the access token (endpoint is base URL, path is relative)
-        // save_access_token(server_id.clone(), ServerAccessToken::new(server_id.clone(), code.clone(), 60 * 15));
-        let path = request_access_token_url(&request_id);
+        // Save the access token for the server
+        let access_token = ServerAccessToken::new(server_id.clone(), code.clone(), expire_in);
+        // dbg!(&server_id, &request_id, &code, &token);
+        save_access_token(server_id.clone(), access_token).await;
+        persist_servers_token(&app_handle).await?;
 
-        // Send the request for the access token using the util::http::HttpClient::get method
-        let mut header = HashMap::new();
-        header.insert("Authorization".to_string(), format!("Bearer {}", code).to_string());
-        let response = HttpClient::advanced_post(&server_id, &path, Some(header), None, None)
-            .await
-            .map_err(|e| format!("Failed to send request to the server: {}", e))?;
+        // Register the server to the search source
+        try_register_server_to_search_source(app_handle.clone(), &server).await;
 
-        if response.status() == StatusCode::OK {
-            // Check if the response has a valid content length
-            if let Some(content_length) = response.content_length() {
-                if content_length > 0 {
-                    // Deserialize the response body to get the access token
-                    let token_result: Result<RequestAccessTokenResponse, _> = response.json().await;
+        // Update the server's profile using the util::http::HttpClient::get method
+        let profile = get_user_profiles(app_handle.clone(), server_id.clone()).await;
+        dbg!(&profile);
 
-                    match token_result {
-                        Ok(token) => {
-                            // Save the access token for the server
-                            let access_token = ServerAccessToken::new(
-                                server_id.clone(),
-                                token.access_token.clone(),
-                                token.expire_in,
-                            );
-                            // dbg!(&server_id, &request_id, &code, &token);
-                            save_access_token(server_id.clone(), access_token);
-                            persist_servers_token(&app_handle)?;
-
-                            let registry = app_handle.state::<SearchSourceRegistry>();
-                            let source = CocoSearchSource::new(server.clone(), Client::new());
-                            registry.register_source(source).await;
-
-                            // Update the server's profile using the util::http::HttpClient::get method
-                            let profile = get_user_profiles(app_handle.clone(), server_id.clone()).await;
-                            dbg!(&profile);
-
-                            match profile {
-                                Ok(p) => {
-                                    server.profile = Some(p);
-                                    server.available = true;
-                                    save_server(&server);
-                                    persist_servers(&app_handle).await?;
-                                    Ok(())
-                                }
-                                Err(e) => Err(format!("Failed to get user profile: {}", e)),
-                            }
-                        }
-                        Err(e) => Err(format!("Failed to deserialize the token response: {}", e)),
-                    }
-                } else {
-                    Err("Received empty response body.".to_string())
-                }
-            } else {
-                Err("Could not determine the content length.".to_string())
+        match profile {
+            Ok(p) => {
+                server.profile = Some(p);
+                server.available = true;
+                save_server(&server).await;
+                persist_servers(&app_handle).await?;
+                Ok(())
             }
-        } else {
-            Err(format!(
-                "Request failed with status: {}, URL: {}, Code: {}, Response: {:?}",
-                response.status(),
-                path,
-                code,
-                response
-            ))
+            Err(e) => Err(format!("Failed to get user profile: {}", e)),
         }
     } else {
         Err(format!(
@@ -96,4 +53,4 @@ pub async fn handle_sso_callback<R: Runtime>(
             server_id, request_id, code
         ))
     }
-}
+}

src-tauri/src/server/connector.rs

@@ -1,11 +1,12 @@
 use crate::common::connector::Connector;
 use crate::common::search::parse_search_results;
-use crate::server::http_client::HttpClient;
+use crate::server::http_client::{HttpClient, status_code_check};
 use crate::server::servers::get_all_servers;
+use http::StatusCode;
 use lazy_static::lazy_static;
 use std::collections::HashMap;
 use std::sync::{Arc, RwLock};
-use tauri::{AppHandle, Runtime};
+use tauri::AppHandle;
 
 lazy_static! {
     static ref CONNECTOR_CACHE: Arc<RwLock<HashMap<String, HashMap<String, Connector>>>> =
@@ -28,12 +29,16 @@ pub fn get_connector_by_id(server_id: &str, connector_id: &str) -> Option<Connec
     Some(connector.clone())
 }
 
-pub async fn refresh_all_connectors<R: Runtime>(app_handle: &AppHandle<R>) -> Result<(), String> {
-    let servers = get_all_servers();
+pub async fn refresh_all_connectors(app_handle: &AppHandle) -> Result<(), String> {
+    let servers = get_all_servers().await;
 
     // Collect all the tasks for fetching and refreshing connectors
     let mut server_map = HashMap::new();
     for server in servers {
+        if !server.enabled {
+            continue;
+        }
+
         // dbg!("start fetch connectors for server: {}", &server.id);
         let connectors = match get_connectors_by_server(app_handle.clone(), server.id.clone()).await
         {
@@ -65,6 +70,7 @@ pub async fn refresh_all_connectors<R: Runtime>(app_handle: &AppHandle<R>) -> Re
     Ok(())
 }
 
+#[allow(dead_code)]
 pub async fn get_connectors_from_cache_or_remote(
     server_id: &str,
 ) -> Result<Vec<Connector>, String> {
@@ -96,17 +102,18 @@ pub async fn get_connectors_from_cache_or_remote(
 
 pub async fn fetch_connectors_by_server(id: &str) -> Result<Vec<Connector>, String> {
     // Use the generic GET method from HttpClient
-    let resp = HttpClient::get(&id, "/connector/_search",None)
+    let resp = HttpClient::get(&id, "/connector/_search", None)
         .await
         .map_err(|e| {
             // dbg!("Error fetching connector for id {}: {}", &id, &e);
             format!("Error fetching connector: {}", e)
         })?;
+    status_code_check(&resp, &[StatusCode::OK, StatusCode::CREATED])?;
 
     // Parse the search results directly from the response body
-    let datasource: Vec<Connector> = parse_search_results(resp).await.map_err(|e| {
-        e.to_string()
-    })?;
+    let datasource: Vec<Connector> = parse_search_results(resp)
+        .await
+        .map_err(|e| e.to_string())?;
 
     // Save the connectors to the cache
     save_connectors_to_cache(&id, datasource.clone());
@@ -115,8 +122,8 @@ pub async fn fetch_connectors_by_server(id: &str) -> Result<Vec<Connector>, Stri
 }
 
 #[tauri::command]
-pub async fn get_connectors_by_server<R: Runtime>(
-    _app_handle: AppHandle<R>,
+pub async fn get_connectors_by_server(
+    _app_handle: AppHandle,
     id: String,
 ) -> Result<Vec<Connector>, String> {
     let connectors = fetch_connectors_by_server(&id).await?;

src-tauri/src/server/datasource.rs

@@ -1,12 +1,13 @@
 use crate::common::datasource::DataSource;
 use crate::common::search::parse_search_results;
 use crate::server::connector::get_connector_by_id;
-use crate::server::http_client::HttpClient;
+use crate::server::http_client::{HttpClient, status_code_check};
 use crate::server::servers::get_all_servers;
+use http::StatusCode;
 use lazy_static::lazy_static;
 use std::collections::HashMap;
 use std::sync::{Arc, RwLock};
-use tauri::{AppHandle, Runtime};
+use tauri::AppHandle;
 
 lazy_static! {
     static ref DATASOURCE_CACHE: Arc<RwLock<HashMap<String, HashMap<String, DataSource>>>> =
@@ -22,6 +23,7 @@ pub fn save_datasource_to_cache(server_id: &str, datasources: Vec<DataSource>) {
     cache.insert(server_id.to_string(), datasources_map);
 }
 
+#[allow(dead_code)]
 pub fn get_datasources_from_cache(server_id: &str) -> Option<HashMap<String, DataSource>> {
     let cache = DATASOURCE_CACHE.read().unwrap(); // Acquire read lock
     // dbg!("cache: {:?}", &cache);
@@ -29,33 +31,36 @@ pub fn get_datasources_from_cache(server_id: &str) -> Option<HashMap<String, Dat
     Some(server_cache.clone())
 }
 
-pub async fn refresh_all_datasources<R: Runtime>(app_handle: &AppHandle<R>) -> Result<(), String> {
+pub async fn refresh_all_datasources(_app_handle: &AppHandle) -> Result<(), String> {
     // dbg!("Attempting to refresh all datasources");
 
-    let servers = get_all_servers();
+    let servers = get_all_servers().await;
 
     let mut server_map = HashMap::new();
 
     for server in servers {
         // dbg!("fetch datasources for server: {}", &server.id);
 
+        if !server.enabled {
+            continue;
+        }
+
         // Attempt to get datasources by server, and continue even if it fails
-        let connectors =
-            match get_datasources_by_server(server.id.as_str()).await {
-                Ok(connectors) => {
-                    // Process connectors only after fetching them
-                    let connectors_map: HashMap<String, DataSource> = connectors
-                        .into_iter()
-                        .map(|connector| (connector.id.clone(), connector))
-                        .collect();
-                    // dbg!("connectors_map: {:?}", &connectors_map);
-                    connectors_map
-                }
-                Err(_e) => {
-                    // dbg!("Failed to get dataSources for server {}: {}", &server.id, e);
-                    HashMap::new()
-                }
-            };
+        let connectors = match datasource_search(server.id.as_str(), None).await {
+            Ok(connectors) => {
+                // Process connectors only after fetching them
+                let connectors_map: HashMap<String, DataSource> = connectors
+                    .into_iter()
+                    .map(|connector| (connector.id.clone(), connector))
+                    .collect();
+                // dbg!("connectors_map: {:?}", &connectors_map);
+                connectors_map
+            }
+            Err(_e) => {
+                // dbg!("Failed to get dataSources for server {}: {}", &server.id, e);
+                HashMap::new()
+            }
+        };
 
         let mut new_map = HashMap::new();
         for (id, datasource) in connectors.iter() {
@@ -79,27 +84,23 @@ pub async fn refresh_all_datasources<R: Runtime>(app_handle: &AppHandle<R>) -> R
         cache.extend(server_map);
         cache.len()
     };
-    // dbg!("datasource_map size: {:?}", cache_size);
-
     Ok(())
 }
 
 #[tauri::command]
-pub async fn get_datasources_by_server(
+pub async fn datasource_search(
     id: &str,
+    query_params: Option<Vec<String>>, //["query=abc", "filter=er", "filter=efg", "from=0", "size=5"],
 ) -> Result<Vec<DataSource>, String> {
-
     // Perform the async HTTP request outside the cache lock
-    let resp = HttpClient::get(id, "/datasource/_search", None)
+    let resp = HttpClient::post(id, "/datasource/_search", query_params, None)
         .await
-        .map_err(|e| {
-            // dbg!("Error fetching datasource: {}", &e);
-            format!("Error fetching datasource: {}", e)
-        })?;
+        .map_err(|e| format!("Error fetching datasource: {}", e))?;
+    status_code_check(&resp, &[StatusCode::OK, StatusCode::CREATED])?;
 
     // Parse the search results from the response
     let datasources: Vec<DataSource> = parse_search_results(resp).await.map_err(|e| {
-        dbg!("Error parsing search results: {}", &e);
+        //dbg!("Error parsing search results: {}", &e);
         e.to_string()
     })?;
 
@@ -108,3 +109,26 @@ pub async fn get_datasources_by_server(
 
     Ok(datasources)
 }
+
+#[tauri::command]
+pub async fn mcp_server_search(
+    id: &str,
+    query_params: Option<Vec<String>>,
+) -> Result<Vec<DataSource>, String> {
+    // Perform the async HTTP request outside the cache lock
+    let resp = HttpClient::post(id, "/mcp_server/_search", query_params, None)
+        .await
+        .map_err(|e| format!("Error fetching datasource: {}", e))?;
+    status_code_check(&resp, &[StatusCode::OK, StatusCode::CREATED])?;
+
+    // Parse the search results from the response
+    let mcp_server: Vec<DataSource> = parse_search_results(resp).await.map_err(|e| {
+        //dbg!("Error parsing search results: {}", &e);
+        e.to_string()
+    })?;
+
+    // Save the updated mcp_server to cache
+    // save_datasource_to_cache(&id, mcp_server.clone());
+
+    Ok(mcp_server)
+}

src-tauri/src/server/http_client.rs

@@ -1,22 +1,52 @@
 use crate::server::servers::{get_server_by_id, get_server_token};
-use http::HeaderName;
+use crate::util::app_lang::get_app_lang;
+use crate::util::platform::Platform;
+use http::{HeaderName, HeaderValue, StatusCode};
 use once_cell::sync::Lazy;
 use reqwest::{Client, Method, RequestBuilder};
-use serde_json::Value;
 use std::collections::HashMap;
+use std::sync::LazyLock;
 use std::time::Duration;
-use tauri::ipc::RuntimeCapability;
 use tokio::sync::Mutex;
 
-pub static HTTP_CLIENT: Lazy<Mutex<Client>> = Lazy::new(|| {
-    let client = Client::builder()
-        .read_timeout(Duration::from_secs(3)) // Set a timeout of 3 second
-        .connect_timeout(Duration::from_secs(3)) // Set a timeout of 3 second
-        .timeout(Duration::from_secs(10)) // Set a timeout of 10 seconds
-        .danger_accept_invalid_certs(true) // example for self-signed certificates
+pub(crate) fn new_reqwest_http_client(accept_invalid_certs: bool) -> Client {
+    Client::builder()
+        .read_timeout(Duration::from_secs(60)) // Set a timeout of 60 second
+        .connect_timeout(Duration::from_secs(30)) // Set a timeout of 30 second
+        .timeout(Duration::from_secs(5 * 60)) // Set a timeout of 5 minute
+        .danger_accept_invalid_certs(accept_invalid_certs) // allow self-signed certificates
         .build()
-        .expect("Failed to build client");
-    Mutex::new(client)
+        .expect("Failed to build client")
+}
+
+pub static HTTP_CLIENT: Lazy<Mutex<Client>> = Lazy::new(|| {
+    let allow_self_signature = crate::settings::_get_allow_self_signature(
+        crate::GLOBAL_TAURI_APP_HANDLE
+            .get()
+            .expect("global tauri app store not set")
+            .clone(),
+    );
+    Mutex::new(new_reqwest_http_client(allow_self_signature))
+});
+
+/// These header values won't change during a process's lifetime.
+static STATIC_HEADERS: LazyLock<HashMap<String, String>> = LazyLock::new(|| {
+    HashMap::from([
+        (
+            "X-OS-NAME".into(),
+            Platform::current()
+                .to_os_name_http_header_str()
+                .into_owned(),
+        ),
+        (
+            "X-OS-VER".into(),
+            sysinfo::System::os_version()
+                .expect("sysinfo::System::os_version() should be Some on major systems"),
+        ),
+        ("X-OS-ARCH".into(), sysinfo::System::cpu_arch()),
+        ("X-APP-NAME".into(), "coco-app".into()),
+        ("X-APP-VER".into(), env!("CARGO_PKG_VERSION").into()),
+    ])
 });
 
 pub struct HttpClient;
@@ -32,14 +62,33 @@ impl HttpClient {
     pub async fn send_raw_request(
         method: Method,
         url: &str,
-        query_params: Option<HashMap<String, Value>>,
+        query_params: Option<Vec<String>>,
         headers: Option<HashMap<String, String>>,
         body: Option<reqwest::Body>,
     ) -> Result<reqwest::Response, String> {
-        let mut request_builder = Self::get_request_builder(method, url, headers, query_params, body).await;
+        log::debug!(
+            "Sending Request: {}, query_params: {:?}, header: {:?}, body: {:?}",
+            &url,
+            &query_params,
+            &headers,
+            &body
+        );
+
+        let request_builder =
+            Self::get_request_builder(method, url, headers, query_params, body).await;
+
+        let response = request_builder.send().await.map_err(|e| {
+            //dbg!("Failed to send request: {}", &e);
+            format!("Failed to send request: {}", e)
+        })?;
+
+        log::debug!(
+            "Request: {}, Response status: {:?}, header: {:?}",
+            &url,
+            &response.status(),
+            &response.headers()
+        );
 
-        let response = request_builder.send().await
-            .map_err(|e| format!("Failed to send request: {}", e))?;
         Ok(response)
     }
 
@@ -47,7 +96,7 @@ impl HttpClient {
         method: Method,
         url: &str,
         headers: Option<HashMap<String, String>>,
-        query_params: Option<HashMap<String, Value>>, // Add query parameters
+        query_params: Option<Vec<String>>, // Add query parameters
         body: Option<reqwest::Body>,
     ) -> RequestBuilder {
         let client = HTTP_CLIENT.lock().await; // Acquire the lock on HTTP_CLIENT
@@ -55,21 +104,60 @@ impl HttpClient {
         // Build the request
         let mut request_builder = client.request(method.clone(), url);
 
-
-        if let Some(h) = headers {
-            let mut req_headers = reqwest::header::HeaderMap::new();
-            for (key, value) in h.into_iter() {
-                let _ = req_headers.insert(
-                    HeaderName::from_bytes(key.as_bytes()).unwrap(),
-                    reqwest::header::HeaderValue::from_str(&value).unwrap(),
+        // Populate the headers defined by us
+        let mut req_headers = reqwest::header::HeaderMap::new();
+        for (key, value) in STATIC_HEADERS.iter() {
+            let key = HeaderName::from_bytes(key.as_bytes())
+                .expect("headers defined by us should be valid");
+            let value = HeaderValue::from_str(value.trim()).unwrap_or_else(|e| {
+                panic!(
+                    "header value [{}] is invalid, error [{}], this should be unreachable",
+                    value, e
                 );
+            });
+            req_headers.insert(key, value);
+        }
+        let app_lang = get_app_lang().await.to_string();
+        req_headers.insert(
+            "X-APP-LANG",
+            HeaderValue::from_str(&app_lang).unwrap_or_else(|e| {
+                panic!(
+                    "header value [{}] is invalid, error [{}], this should be unreachable",
+                    app_lang, e
+                );
+            }),
+        );
+
+        // Headers from the function parameter
+        if let Some(h) = headers {
+            for (key, value) in h.into_iter() {
+                match (
+                    HeaderName::from_bytes(key.as_bytes()),
+                    HeaderValue::from_str(value.trim()),
+                ) {
+                    (Ok(name), Ok(val)) => {
+                        req_headers.insert(name, val);
+                    }
+                    (Err(e), _) => {
+                        eprintln!("Invalid header name: {:?}, error: {}", key, e);
+                    }
+                    (_, Err(e)) => {
+                        eprintln!(
+                            "Invalid header value for {}: {:?}, error: {}",
+                            key, value, e
+                        );
+                    }
+                }
             }
             request_builder = request_builder.headers(req_headers);
         }
 
-        if let Some(query) = query_params {
+        if let Some(params) = query_params {
+            let query: Vec<(&str, &str)> =
+                params.iter().filter_map(|s| s.split_once('=')).collect();
             request_builder = request_builder.query(&query);
         }
+
         // Add body if present
         if let Some(b) = body {
             request_builder = request_builder.body(b);
@@ -83,45 +171,49 @@ impl HttpClient {
         method: Method,
         path: &str,
         custom_headers: Option<HashMap<String, String>>,
-        query_params: Option<HashMap<String, Value>>,
+        query_params: Option<Vec<String>>,
         body: Option<reqwest::Body>,
     ) -> Result<reqwest::Response, String> {
         // Fetch the server using the server_id
-        let server = get_server_by_id(server_id);
+        let server = get_server_by_id(server_id).await;
         if let Some(s) = server {
             // Construct the URL
             let url = HttpClient::join_url(&s.endpoint, path);
 
             // Retrieve the token for the server (token is optional)
-            let token = get_server_token(server_id).map(|t| t.access_token.clone());
+            let token = get_server_token(server_id)
+                .await
+                .map(|t| t.access_token.clone());
 
             let mut headers = if let Some(custom_headers) = custom_headers {
                 custom_headers
             } else {
-                let mut headers = HashMap::new();
+                let headers = HashMap::new();
                 headers
             };
 
             if let Some(t) = token {
-                headers.insert(
-                    "X-API-TOKEN".to_string(),
-                    t,
-                );
+                headers.insert("X-API-TOKEN".to_string(), t);
             }
 
-
-            // dbg!(&server_id);
-            // dbg!(&url);
-            // dbg!(&headers);
+            // log::debug!(
+            //     "Sending request to server: {}, url: {}, headers: {:?}",
+            //     &server_id,
+            //     &url,
+            //     &headers
+            // );
 
             Self::send_raw_request(method, &url, query_params, Some(headers), body).await
         } else {
-            Err("Server not found".to_string())
+            Err(format!("Server [{}] not found", server_id))
         }
     }
 
     // Convenience method for GET requests (as it's the most common)
-    pub async fn get(server_id: &str, path: &str, query_params: Option<HashMap<String, Value>>, // Add query parameters
+    pub async fn get(
+        server_id: &str,
+        path: &str,
+        query_params: Option<Vec<String>>,
     ) -> Result<reqwest::Response, String> {
         HttpClient::send_request(server_id, Method::GET, path, None, query_params, None).await
     }
@@ -130,7 +222,7 @@ impl HttpClient {
     pub async fn post(
         server_id: &str,
         path: &str,
-        query_params: Option<HashMap<String, Value>>, // Add query parameters
+        query_params: Option<Vec<String>>,
         body: Option<reqwest::Body>,
     ) -> Result<reqwest::Response, String> {
         HttpClient::send_request(server_id, Method::POST, path, None, query_params, body).await
@@ -140,27 +232,83 @@ impl HttpClient {
         server_id: &str,
         path: &str,
         custom_headers: Option<HashMap<String, String>>,
-        query_params: Option<HashMap<String, Value>>, // Add query parameters
+        query_params: Option<Vec<String>>,
         body: Option<reqwest::Body>,
     ) -> Result<reqwest::Response, String> {
-        HttpClient::send_request(server_id, Method::POST, path, custom_headers, query_params, body).await
+        HttpClient::send_request(
+            server_id,
+            Method::POST,
+            path,
+            custom_headers,
+            query_params,
+            body,
+        )
+        .await
     }
 
     // Convenience method for PUT requests
+    #[allow(dead_code)]
     pub async fn put(
         server_id: &str,
         path: &str,
         custom_headers: Option<HashMap<String, String>>,
-        query_params: Option<HashMap<String, Value>>, // Add query parameters
+        query_params: Option<Vec<String>>,
         body: Option<reqwest::Body>,
     ) -> Result<reqwest::Response, String> {
-        HttpClient::send_request(server_id, Method::PUT, path, custom_headers, query_params, body).await
+        HttpClient::send_request(
+            server_id,
+            Method::PUT,
+            path,
+            custom_headers,
+            query_params,
+            body,
+        )
+        .await
     }
 
     // Convenience method for DELETE requests
-    pub async fn delete(server_id: &str, path: &str, custom_headers: Option<HashMap<String, String>>,
-                        query_params: Option<HashMap<String, Value>>, // Add query parameters
+    #[allow(dead_code)]
+    pub async fn delete(
+        server_id: &str,
+        path: &str,
+        custom_headers: Option<HashMap<String, String>>,
+        query_params: Option<Vec<String>>,
     ) -> Result<reqwest::Response, String> {
-        HttpClient::send_request(server_id, Method::DELETE, path, custom_headers, query_params, None).await
+        HttpClient::send_request(
+            server_id,
+            Method::DELETE,
+            path,
+            custom_headers,
+            query_params,
+            None,
+        )
+        .await
+    }
+}
+
+/// Helper function to check status code.
+///
+/// If the status code is not in the `allowed_status_codes` list, return an error.
+pub(crate) fn status_code_check(
+    response: &reqwest::Response,
+    allowed_status_codes: &[StatusCode],
+) -> Result<(), String> {
+    let status_code = response.status();
+
+    if !allowed_status_codes.contains(&status_code) {
+        let msg = format!(
+            "Response of request [{}] status code failed: status code [{}], which is not in the 'allow' list {:?}",
+            response.url(),
+            status_code,
+            allowed_status_codes
+                .iter()
+                .map(|status| status.to_string())
+                .collect::<Vec<String>>()
+        );
+        log::warn!("{}", msg);
+
+        Err(msg)
+    } else {
+        Ok(())
     }
 }

src-tauri/src/server/mod.rs

@@ -1,10 +1,13 @@
 //! This file contains Rust APIs related to Coco Server management.
 
+pub mod attachment;
 pub mod auth;
-pub mod servers;
 pub mod connector;
 pub mod datasource;
 pub mod http_client;
 pub mod profile;
 pub mod search;
-pub mod websocket;
+pub mod servers;
+pub mod synthesize;
+pub mod system_settings;
+pub mod transcription;

src-tauri/src/server/profile.rs

@@ -1,10 +1,11 @@
+use crate::common::http::get_response_body_text;
 use crate::common::profile::UserProfile;
 use crate::server::http_client::HttpClient;
-use tauri::{AppHandle, Runtime};
+use tauri::AppHandle;
 
 #[tauri::command]
-pub async fn get_user_profiles<R: Runtime>(
-    _app_handle: AppHandle<R>,
+pub async fn get_user_profiles(
+    _app_handle: AppHandle,
     server_id: String,
 ) -> Result<UserProfile, String> {
     // Use the generic GET method from HttpClient
@@ -12,14 +13,16 @@ pub async fn get_user_profiles<R: Runtime>(
         .await
         .map_err(|e| format!("Error fetching profile: {}", e))?;
 
-    if let Some(content_length) = response.content_length() {
-        if content_length > 0 {
-            let profile: UserProfile = response
-                .json()
-                .await
-                .map_err(|e| format!("Failed to parse response: {}", e))?;
-            return Ok(profile);
-        }
+    // Use get_response_body_text to extract the body content
+    let response_body = get_response_body_text(response)
+        .await
+        .map_err(|e| format!("Failed to read response body: {}", e))?;
+
+    // Check if the response body is not empty before deserializing
+    if !response_body.is_empty() {
+        let profile: UserProfile = serde_json::from_str(&response_body)
+            .map_err(|e| format!("Failed to parse response: {}", e))?;
+        return Ok(profile);
     }
 
     Err("Profile not found or empty response".to_string())

src-tauri/src/server/search.rs

@@ -1,17 +1,17 @@
-use crate::common::document::Document;
-use crate::common::search::{
-    parse_search_response, QueryHits, QueryResponse, QuerySource, SearchQuery,
-};
+use crate::common::document::{Document, OnOpened};
+use crate::common::error::SearchError;
+use crate::common::http::get_response_body_text;
+use crate::common::search::{QueryHits, QueryResponse, QuerySource, SearchQuery, SearchResponse};
 use crate::common::server::Server;
-use crate::common::traits::{SearchError, SearchSource};
+use crate::common::traits::SearchSource;
 use crate::server::http_client::HttpClient;
-use crate::server::servers::get_server_token;
 use async_trait::async_trait;
-// use futures::stream::StreamExt;
 use ordered_float::OrderedFloat;
-use reqwest::{Client, Method, RequestBuilder};
+use reqwest::StatusCode;
 use std::collections::HashMap;
-// use std::hash::Hash;
+use tauri::AppHandle;
+
+#[allow(dead_code)]
 pub(crate) struct DocumentsSizedCollector {
     size: u64,
     /// Documents and scores
@@ -20,6 +20,7 @@ pub(crate) struct DocumentsSizedCollector {
     docs: Vec<(String, Document, OrderedFloat<f64>)>,
 }
 
+#[allow(dead_code)]
 impl DocumentsSizedCollector {
     pub(crate) fn new(size: u64) -> Self {
         // there will be size + 1 documents in docs at max
@@ -71,36 +72,11 @@ const COCO_SERVERS: &str = "coco-servers";
 
 pub struct CocoSearchSource {
     server: Server,
-    client: Client,
 }
 
 impl CocoSearchSource {
-    pub fn new(server: Server, client: Client) -> Self {
-        CocoSearchSource { server, client }
-    }
-
-    fn build_request_from_query(&self, query: &SearchQuery) -> RequestBuilder {
-        self.build_request(query.from, query.size, &query.query_strings)
-    }
-
-    fn build_request(
-        &self,
-        from: u64,
-        size: u64,
-        query_strings: &HashMap<String, String>,
-    ) -> RequestBuilder {
-        let url = HttpClient::join_url(&self.server.endpoint, "/query/_search");
-        let mut request_builder = self.client.request(Method::GET, url);
-
-        if !self.server.public {
-            if let Some(token) = get_server_token(&self.server.id).map(|t| t.access_token) {
-                request_builder = request_builder.header("X-API-TOKEN", token);
-            }
-        }
-
-        request_builder
-            .query(&[("from", &from.to_string()), ("size", &size.to_string())])
-            .query(query_strings)
+    pub fn new(server: Server) -> Self {
+        CocoSearchSource { server }
     }
 }
 
@@ -114,58 +90,80 @@ impl SearchSource for CocoSearchSource {
         }
     }
 
-    // Directly return Result<QueryResponse, SearchError> instead of Future
-    async fn search(&self, query: SearchQuery) -> Result<QueryResponse, SearchError> {
-        let _server_id = self.server.id.clone();
-        let _server_name = self.server.name.clone();
-        let request_builder = self.build_request_from_query(&query);
+    async fn search(
+        &self,
+        _tauri_app_handle: AppHandle,
+        query: SearchQuery,
+    ) -> Result<QueryResponse, SearchError> {
+        let url = "/query/_search";
+        let mut total_hits = 0;
+        let mut hits: Vec<(Document, f64)> = Vec::new();
 
-        // Send the HTTP request asynchronously
-        let response = request_builder.send().await;
+        let mut query_params = Vec::new();
 
-        match response {
-            Ok(response) => {
-                let status_code = response.status().as_u16();
+        // Add from/size as number values
+        query_params.push(format!("from={}", query.from));
+        query_params.push(format!("size={}", query.size));
 
-                if status_code >= 200 && status_code < 400 {
-                    // Parse the response only if the status code is successful
-                    match parse_search_response(response).await {
-                        Ok(response) => {
-                            let total_hits = response.hits.total.value as usize;
-                            let hits: Vec<(Document, f64)> = response
-                                .hits
-                                .hits
-                                .into_iter()
-                                .map(|hit| {
-                                    // Handling Option<f64> in hit._score by defaulting to 0.0 if None
-                                    (hit._source, hit._score.unwrap_or(0.0)) // Use 0.0 if _score is None
-                                })
-                                .collect();
+        // Add query strings
+        for (key, value) in query.query_strings {
+            query_params.push(format!("{}={}", key, value));
+        }
 
-                            // Return the QueryResponse with hits and total hits
-                            Ok(QueryResponse {
-                                source: self.get_type(),
-                                hits,
-                                total_hits,
-                            })
-                        }
-                        Err(err) => {
-                            // Parse error when response parsing fails
-                            Err(SearchError::ParseError(err.to_string()))
-                        }
-                    }
-                } else {
-                    // Handle unsuccessful HTTP status codes (e.g., 4xx, 5xx)
-                    Err(SearchError::HttpError(format!(
-                        "Request failed with status code: {}",
-                        status_code
-                    )))
+        let response = HttpClient::get(&self.server.id, &url, Some(query_params))
+            .await
+            .map_err(|e| SearchError::HttpError {
+                status_code: None,
+                msg: format!("{}", e),
+            })?;
+        let status_code = response.status();
+
+        if ![StatusCode::OK, StatusCode::CREATED].contains(&status_code) {
+            return Err(SearchError::HttpError {
+                status_code: Some(status_code),
+                msg: format!("Request failed with status code [{}]", status_code),
+            });
+        }
+
+        // Use the helper function to parse the response body
+        let response_body = get_response_body_text(response)
+            .await
+            .map_err(|e| SearchError::ParseError(e))?;
+
+        // Check if the response body is empty
+        if !response_body.is_empty() {
+            // log::info!("Search response body: {}", &response_body);
+
+            // Parse the search response from the body text
+            let parsed: SearchResponse<Document> = serde_json::from_str(&response_body)
+                .map_err(|e| SearchError::ParseError(format!("{}", e)))?;
+
+            // Process the parsed response
+            total_hits = parsed.hits.total.value as usize;
+
+            if let Some(items) = parsed.hits.hits {
+                for hit in items {
+                    let mut document = hit._source;
+                    // Default _score to 0.0 if None
+                    let score = hit._score.unwrap_or(0.0);
+
+                    let on_opened = document
+                        .url
+                        .as_ref()
+                        .map(|url| OnOpened::Document { url: url.clone() });
+                    // Set the `on_opened` field as it won't be returned from Coco server
+                    document.on_opened = on_opened;
+
+                    hits.push((document, score));
                 }
             }
-            Err(err) => {
-                // Handle error from the request itself
-                Err(SearchError::HttpError(err.to_string()))
-            }
         }
+
+        // Return the final result
+        Ok(QueryResponse {
+            source: self.get_type(),
+            hits,
+            total_hits,
+        })
     }
 }

src-tauri/src/server/synthesize.rs

@@ -0,0 +1,57 @@
+use crate::server::http_client::HttpClient;
+use futures_util::StreamExt;
+use http::Method;
+use serde_json::json;
+use tauri::{AppHandle, Emitter, command};
+
+#[command]
+pub async fn synthesize(
+    app_handle: AppHandle,
+    client_id: String,
+    server_id: String,
+    voice: String,
+    content: String,
+) -> Result<(), String> {
+    let body = json!({
+        "voice": voice,
+        "content": content,
+    })
+    .to_string();
+
+    let response = HttpClient::send_request(
+        server_id.as_str(),
+        Method::POST,
+        "/services/audio/synthesize",
+        None,
+        None,
+        Some(reqwest::Body::from(body.to_string())),
+    )
+    .await?;
+
+    log::info!("Synthesize response status: {}", response.status());
+
+    if response.status() == 429 {
+        return Ok(());
+    }
+
+    if !response.status().is_success() {
+        return Err(format!("Request Failed: {}", response.status()));
+    }
+
+    let mut stream = response.bytes_stream();
+    while let Some(chunk) = stream.next().await {
+        match chunk {
+            Ok(bytes) => {
+                if let Err(err) = app_handle.emit(&client_id, bytes.to_vec()) {
+                    log::error!("Emit error: {:?}", err);
+                }
+            }
+            Err(e) => {
+                log::error!("Stream error: {:?}", e);
+                break;
+            }
+        }
+    }
+
+    Ok(())
+}

src-tauri/src/server/system_settings.rs

@@ -0,0 +1,15 @@
+use crate::server::http_client::HttpClient;
+use serde_json::Value;
+use tauri::command;
+
+#[command]
+pub async fn get_system_settings(server_id: String) -> Result<Value, String> {
+    let response = HttpClient::get(&server_id, "/settings", None)
+        .await
+        .map_err(|err| err.to_string())?;
+
+    response
+        .json::<Value>()
+        .await
+        .map_err(|err| err.to_string())
+}

src-tauri/src/server/transcription.rs

@@ -0,0 +1,96 @@
+use crate::common::http::get_response_body_text;
+use crate::server::http_client::HttpClient;
+use serde::{Deserialize, Serialize};
+use serde_json::{Value, from_str};
+use tauri::command;
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct TranscriptionResponse {
+    task_id: String,
+    results: Vec<Value>,
+}
+
+#[command]
+pub async fn transcription(
+    server_id: String,
+    audio_content: String,
+) -> Result<TranscriptionResponse, String> {
+    // Send request to initiate transcription task
+    let init_response = HttpClient::post(
+        &server_id,
+        "/services/audio/transcription",
+        None,
+        Some(audio_content.into()),
+    )
+    .await
+    .map_err(|e| format!("Failed to initiate transcription: {}", e))?;
+
+    // Extract response body as text
+    let init_response_text = get_response_body_text(init_response)
+        .await
+        .map_err(|e| format!("Failed to read initial response body: {}", e))?;
+
+    // Parse response JSON to extract task ID
+    let init_response_json: Value = from_str(&init_response_text).map_err(|e| {
+        format!(
+            "Failed to parse initial response JSON: {}. Raw response: {}",
+            e, init_response_text
+        )
+    })?;
+
+    let transcription_task_id = init_response_json["task_id"]
+        .as_str()
+        .ok_or_else(|| {
+            format!(
+                "Missing or invalid task_id in initial response: {}",
+                init_response_text
+            )
+        })?
+        .to_string();
+
+    // Set up polling with timeout
+    let polling_start = std::time::Instant::now();
+    const POLLING_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(30);
+    const POLLING_INTERVAL: std::time::Duration = std::time::Duration::from_millis(200);
+
+    let mut transcription_response: TranscriptionResponse;
+
+    loop {
+        // Poll for transcription results
+        let poll_response = HttpClient::get(
+            &server_id,
+            &format!("/services/audio/task/{}", transcription_task_id),
+            None,
+        )
+        .await
+        .map_err(|e| format!("Failed to poll transcription task: {}", e))?;
+
+        // Extract poll response body
+        let poll_response_text = get_response_body_text(poll_response)
+            .await
+            .map_err(|e| format!("Failed to read poll response body: {}", e))?;
+
+        // Parse poll response JSON
+        transcription_response = from_str(&poll_response_text).map_err(|e| {
+            format!(
+                "Failed to parse poll response JSON: {}. Raw response: {}",
+                e, poll_response_text
+            )
+        })?;
+
+        // Check if transcription results are available
+        if !transcription_response.results.is_empty() {
+            break;
+        }
+
+        // Check for timeout
+        if polling_start.elapsed() >= POLLING_TIMEOUT {
+            return Err("Transcription task timed out after 30 seconds".to_string());
+        }
+
+        // Wait before next poll
+        tokio::time::sleep(POLLING_INTERVAL).await;
+    }
+
+    Ok(transcription_response)
+}

src-tauri/src/server/websocket.rs

@@ -1,184 +0,0 @@
-use crate::server::servers::{get_server_by_id, get_server_token};
-use futures_util::{SinkExt, StreamExt};
-use http::{HeaderMap, HeaderName, HeaderValue};
-use std::sync::Arc;
-use tauri::Emitter;
-use tokio::net::TcpStream;
-use tokio::sync::{mpsc, Mutex};
-use tokio_tungstenite::tungstenite::client::IntoClientRequest;
-use tokio_tungstenite::tungstenite::Error;
-use tokio_tungstenite::tungstenite::Error as WsError;
-use tokio_tungstenite::{
-    connect_async, tungstenite::protocol::Message, MaybeTlsStream, WebSocketStream,
-};
-use tungstenite::handshake::client::generate_key;
-
-#[derive(Default)]
-pub struct WebSocketManager {
-    ws_connection: Arc<Mutex<Option<WebSocketStream<MaybeTlsStream<TcpStream>>>>>,
-    cancel_tx: Arc<Mutex<Option<mpsc::Sender<()>>>>,
-}
-
-// Function to convert the HTTP endpoint to WebSocket endpoint
-fn convert_to_websocket(endpoint: &str) -> Result<String, String> {
-    let url = url::Url::parse(endpoint).map_err(|e| format!("Invalid URL: {}", e))?;
-
-    // Determine WebSocket protocol based on the scheme
-    let ws_protocol = if url.scheme() == "https" {
-        "wss://"
-    } else {
-        "ws://"
-    };
-
-    // Extract host and port (if present)
-    let host = url.host_str().ok_or_else(|| "No host found in URL")?;
-    let port = url
-        .port_or_known_default()
-        .unwrap_or(if url.scheme() == "https" { 443 } else { 80 });
-
-    // Build WebSocket URL, include the port if not the default
-    let ws_endpoint = if port == 80 || port == 443 {
-        format!("{}{}{}", ws_protocol, host, "/ws")
-    } else {
-        format!("{}{}:{}/ws", ws_protocol, host, port)
-    };
-
-    Ok(ws_endpoint)
-}
-
-// Function to build a HeaderMap from a vector of key-value pairs
-fn build_header_map(headers: Vec<(String, String)>) -> Result<HeaderMap, String> {
-    let mut header_map = HeaderMap::new();
-    for (key, value) in headers {
-        let header_name = HeaderName::from_bytes(key.as_bytes())
-            .map_err(|e| format!("Invalid header name: {}", e))?;
-        let header_value =
-            HeaderValue::from_str(&value).map_err(|e| format!("Invalid header value: {}", e))?;
-        header_map.insert(header_name, header_value);
-    }
-    Ok(header_map)
-}
-
-#[tauri::command]
-pub async fn connect_to_server(
-    id: String,
-    state: tauri::State<'_, WebSocketManager>,
-    app_handle: tauri::AppHandle,
-) -> Result<(), String> {
-    // Disconnect any existing connection first
-    disconnect(state.clone()).await?;
-
-    // Retrieve server details
-    let server =
-        get_server_by_id(id.as_str()).ok_or_else(|| format!("Server with ID {} not found", id))?;
-    let endpoint = convert_to_websocket(server.endpoint.as_str())?;
-
-    // Retrieve the token for the server (token is optional)
-    let token = get_server_token(id.as_str()).map(|t| t.access_token.clone());
-
-    // Create the WebSocket request
-    let mut request =
-        tokio_tungstenite::tungstenite::client::IntoClientRequest::into_client_request(&endpoint)
-            .map_err(|e| format!("Failed to create WebSocket request: {}", e))?;
-
-    // Add necessary headers
-    request
-        .headers_mut()
-        .insert("Connection", "Upgrade".parse().unwrap());
-    request
-        .headers_mut()
-        .insert("Upgrade", "websocket".parse().unwrap());
-    request
-        .headers_mut()
-        .insert("Sec-WebSocket-Version", "13".parse().unwrap());
-    request
-        .headers_mut()
-        .insert("Sec-WebSocket-Key", generate_key().parse().unwrap());
-
-    // If a token exists, add it to the headers
-    if let Some(token) = token {
-        request
-            .headers_mut()
-            .insert("X-API-TOKEN", token.parse().unwrap());
-    }
-
-    // Establish the WebSocket connection
-    // dbg!(&request);
-    let (mut ws_remote, _) = connect_async(request).await.map_err(|e| match e {
-        Error::ConnectionClosed => "WebSocket connection was closed".to_string(),
-        Error::Protocol(protocol_error) => format!("Protocol error: {}", protocol_error),
-        Error::Utf8 => "UTF-8 error in WebSocket data".to_string(),
-        _ => format!("Unknown error: {:?}", e),
-    })?;
-
-    // Create cancellation channel
-    let (cancel_tx, mut cancel_rx) = mpsc::channel(1);
-
-    // Store connection and cancellation sender
-    *state.ws_connection.lock().await = Some(ws_remote);
-    *state.cancel_tx.lock().await = Some(cancel_tx);
-    // Spawn listener task with cancellation
-    let app_handle_clone = app_handle.clone();
-    let connection_clone = state.ws_connection.clone();
-    tokio::spawn(async move {
-        let mut connection = connection_clone.lock().await;
-        if let Some(ws) = connection.as_mut() {
-            loop {
-                tokio::select! {
-                    msg = ws.next() => {
-                        match msg {
-                            Some(Ok(Message::Text(text))) => {
-                                //println!("Received message: {}", text);
-                                let _ = app_handle_clone.emit("ws-message", text);
-                            },
-                                Some(Err(WsError::ConnectionClosed)) => {
-                                let _ = app_handle_clone.emit("ws-error", id);
-                                eprintln!("WebSocket connection closed by the server.");
-                                break;
-                            },
-                            Some(Err(WsError::Protocol(e))) => {
-                                let _ = app_handle_clone.emit("ws-error", id);
-                                eprintln!("Protocol error: {}", e);
-                                break;
-                            },
-                            Some(Err(WsError::Utf8)) => {
-                                let _ = app_handle_clone.emit("ws-error", id);
-                                eprintln!("Received invalid UTF-8 data.");
-                                break;
-                            },
-                            Some(Err(_)) => {
-                                let _ = app_handle_clone.emit("ws-error", id);
-                                eprintln!("WebSocket error encountered.");
-                                break;
-                            },
-                            _ => continue,
-                        }
-                    }
-                    _ = cancel_rx.recv() => {
-                        let _ = app_handle_clone.emit("ws-error", id);
-                        dbg!("Cancelling WebSocket connection");
-                        break;
-                    }
-                }
-            }
-        }
-    });
-
-    Ok(())
-}
-
-#[tauri::command]
-pub async fn disconnect(state: tauri::State<'_, WebSocketManager>) -> Result<(), String> {
-    // Send cancellation signal
-    if let Some(cancel_tx) = state.cancel_tx.lock().await.take() {
-        let _ = cancel_tx.send(()).await;
-    }
-
-    // Close connection
-    let mut connection = state.ws_connection.lock().await;
-    if let Some(mut ws) = connection.take() {
-        let _ = ws.close(None).await;
-    }
-
-    Ok(())
-}

src-tauri/src/settings.rs

@@ -0,0 +1,72 @@
+use crate::COCO_TAURI_STORE;
+use serde_json::Value as Json;
+use tauri::AppHandle;
+use tauri_plugin_store::StoreExt;
+
+const SETTINGS_ALLOW_SELF_SIGNATURE: &str = "settings_allow_self_signature";
+
+#[tauri::command]
+pub async fn set_allow_self_signature(tauri_app_handle: AppHandle, value: bool) {
+    use crate::server::http_client;
+
+    let store = tauri_app_handle
+        .store(COCO_TAURI_STORE)
+        .unwrap_or_else(|e| {
+            panic!(
+                "store [{}] not found/loaded, error [{}]",
+                COCO_TAURI_STORE, e
+            )
+        });
+
+    let old_value = match store
+        .get(SETTINGS_ALLOW_SELF_SIGNATURE)
+        .expect("should be initialized upon first get call")
+    {
+        Json::Bool(b) => b,
+        _ => unreachable!(
+            "{} should be stored in a boolean",
+            SETTINGS_ALLOW_SELF_SIGNATURE
+        ),
+    };
+
+    if old_value == value {
+        return;
+    }
+
+    store.set(SETTINGS_ALLOW_SELF_SIGNATURE, value);
+
+    let mut guard = http_client::HTTP_CLIENT.lock().await;
+    *guard = http_client::new_reqwest_http_client(value)
+}
+
+/// Synchronous version of `async get_allow_self_signature()`.
+pub fn _get_allow_self_signature(tauri_app_handle: AppHandle) -> bool {
+    let store = tauri_app_handle
+        .store(COCO_TAURI_STORE)
+        .unwrap_or_else(|e| {
+            panic!(
+                "store [{}] not found/loaded, error [{}]",
+                COCO_TAURI_STORE, e
+            )
+        });
+    if !store.has(SETTINGS_ALLOW_SELF_SIGNATURE) {
+        // default to false
+        store.set(SETTINGS_ALLOW_SELF_SIGNATURE, false);
+    }
+
+    match store
+        .get(SETTINGS_ALLOW_SELF_SIGNATURE)
+        .expect("should be Some")
+    {
+        Json::Bool(b) => b,
+        _ => unreachable!(
+            "{} should be stored in a boolean",
+            SETTINGS_ALLOW_SELF_SIGNATURE
+        ),
+    }
+}
+
+#[tauri::command]
+pub async fn get_allow_self_signature(tauri_app_handle: AppHandle) -> bool {
+    _get_allow_self_signature(tauri_app_handle)
+}

src-tauri/src/setup/linux.rs

@@ -1,3 +1,9 @@
-use tauri::{App, WebviewWindow};
+use tauri::{AppHandle, WebviewWindow};
 
-pub fn platform(_app: &mut App, _main_window: WebviewWindow, _settings_window: WebviewWindow) {}
+pub fn platform(
+    _tauri_app_handle: &AppHandle,
+    _main_window: WebviewWindow,
+    _settings_window: WebviewWindow,
+    _check_window: WebviewWindow,
+) {
+}

src-tauri/src/setup/mac.rs

@@ -1,9 +1,7 @@
-//credits to: https://github.com/ayangweb/ayangweb-EcoPaste/blob/169323dbe6365ffe4abb64d867439ed2ea84c6d1/src-tauri/src/core/setup/mac.rs
-use tauri::{ActivationPolicy, App, Emitter, EventTarget, WebviewWindow};
-use tauri_nspanel::{
-    cocoa::appkit::{NSMainMenuWindowLevel, NSWindowCollectionBehavior},
-    panel_delegate, WebviewWindowExt,
-};
+//! credits to: https://github.com/ayangweb/ayangweb-EcoPaste/blob/169323dbe6365ffe4abb64d867439ed2ea84c6d1/src-tauri/src/core/setup/mac.rs
+
+use tauri::{AppHandle, Emitter, EventTarget, WebviewWindow};
+use tauri_nspanel::{WebviewWindowExt, cocoa::appkit::NSWindowCollectionBehavior, panel_delegate};
 
 use crate::common::MAIN_WINDOW_LABEL;
 
@@ -15,21 +13,24 @@ const WINDOW_BLUR_EVENT: &str = "tauri://blur";
 const WINDOW_MOVED_EVENT: &str = "tauri://move";
 const WINDOW_RESIZED_EVENT: &str = "tauri://resize";
 
-pub fn platform(app: &mut App, main_window: WebviewWindow, _settings_window: WebviewWindow) {
-    app.set_activation_policy(ActivationPolicy::Accessory);
-
+pub fn platform(
+    _tauri_app_handle: &AppHandle,
+    main_window: WebviewWindow,
+    _settings_window: WebviewWindow,
+    _check_window: WebviewWindow,
+) {
     // Convert ns_window to ns_panel
     let panel = main_window.to_panel().unwrap();
 
     // Make the window above the dock
-    panel.set_level(NSMainMenuWindowLevel + 1);
+    panel.set_level(20);
 
     // Do not steal focus from other windows
     panel.set_style_mask(NSWindowStyleMaskNonActivatingPanel);
 
-    // Share the window across all desktop spaces and full screen
+    // Open the window in the active workspace and full screen
     panel.set_collection_behaviour(
-        NSWindowCollectionBehavior::NSWindowCollectionBehaviorCanJoinAllSpaces
+        NSWindowCollectionBehavior::NSWindowCollectionBehaviorMoveToActiveSpace
             | NSWindowCollectionBehavior::NSWindowCollectionBehaviorStationary
             | NSWindowCollectionBehavior::NSWindowCollectionBehaviorFullScreenAuxiliary,
     );

src-tauri/src/setup/mod.rs

@@ -1,4 +1,9 @@
-use tauri::{App, WebviewWindow};
+use crate::GLOBAL_TAURI_APP_HANDLE;
+use crate::autostart;
+use crate::common::register::SearchSourceRegistry;
+use crate::util::app_lang::update_app_lang;
+use std::sync::OnceLock;
+use tauri::{AppHandle, Manager, WebviewWindow};
 
 #[cfg(target_os = "macos")]
 mod mac;
@@ -18,10 +23,77 @@ pub use windows::*;
 #[cfg(target_os = "linux")]
 pub use linux::*;
 
-pub fn default(app: &mut App, main_window: WebviewWindow, settings_window: WebviewWindow) {
+pub fn default(
+    tauri_app_handle: &AppHandle,
+    main_window: WebviewWindow,
+    settings_window: WebviewWindow,
+    check_window: WebviewWindow,
+) {
     // Development mode automatically opens the console: https://tauri.app/develop/debug
-    #[cfg(any(dev, debug_assertions))]
+    #[cfg(debug_assertions)]
     main_window.open_devtools();
 
-    platform(app, main_window.clone(), settings_window.clone());
+    platform(
+        tauri_app_handle,
+        main_window.clone(),
+        settings_window.clone(),
+        check_window.clone(),
+    );
+}
+
+/// Use this variable to track if tauri command `backend_setup()` gets called
+/// by the frontend.
+pub(super) static BACKEND_SETUP_FUNC_INVOKED: OnceLock<()> = OnceLock::new();
+
+/// This function includes the setup job that has to be coordinated with the
+/// frontend, or the App will panic due to races[1].  The way we coordinate is to
+/// expose this function as a Tauri command, and let the frontend code invoke
+/// it.
+///
+/// The frontend code should ensure that:
+///
+/// 1. This command gets called before invoking other commands.
+/// 2. This command should only be called once.
+///
+/// [1]: For instance, Tauri command `list_extensions()` relies on an in-memory
+/// extension list that won't be initialized until `init_extensions()` gets
+/// called.  If the frontend code invokes `list_extensions()` before `init_extension()`
+/// gets executed, we get a panic.
+#[tauri::command]
+#[function_name::named]
+pub(crate) async fn backend_setup(tauri_app_handle: AppHandle, app_lang: String) {
+    if BACKEND_SETUP_FUNC_INVOKED.get().is_some() {
+        return;
+    }
+
+    GLOBAL_TAURI_APP_HANDLE
+        .set(tauri_app_handle.clone())
+        .expect("global tauri AppHandle already initialized");
+    log::trace!("global Tauri AppHandle set");
+
+    let registry = SearchSourceRegistry::default();
+    tauri_app_handle.manage(registry); // Store registry in Tauri's app state
+
+    // This has to be called before initializing extensions as doing that
+    // requires access to the shortcut store, which will be set by this
+    // function.
+    crate::shortcut::enable_shortcut(&tauri_app_handle);
+
+    crate::init(&tauri_app_handle).await;
+
+    if let Err(err) = crate::extension::init_extensions(&tauri_app_handle).await {
+        log::error!(
+            "failed to initialize extension-related stuff, error [{}]",
+            err
+        );
+    }
+
+    autostart::ensure_autostart_state_consistent(&tauri_app_handle).unwrap();
+
+    update_app_lang(app_lang).await;
+
+    // Invoked, now update the state
+    BACKEND_SETUP_FUNC_INVOKED
+        .set(())
+        .unwrap_or_else(|_| panic!("tauri command {}() gets called twice!", function_name!()));
 }

src-tauri/src/setup/windows.rs

@@ -1,3 +1,9 @@
-use tauri::{App, WebviewWindow};
+use tauri::{AppHandle, WebviewWindow};
 
-pub fn platform(_app: &mut App, _main_window: WebviewWindow, _settings_window: WebviewWindow) {}
+pub fn platform(
+    _tauri_app_handle: &AppHandle,
+    _main_window: WebviewWindow,
+    _settings_window: WebviewWindow,
+    _check_window: WebviewWindow,
+) {
+}

src-tauri/src/shortcut.rs

@@ -1,13 +1,8 @@
-use crate::{move_window_to_active_monitor, COCO_TAURI_STORE};
-use tauri::App;
-use tauri::AppHandle;
-use tauri::Manager;
-use tauri::Runtime;
-use tauri_plugin_global_shortcut::GlobalShortcutExt;
-use tauri_plugin_global_shortcut::Shortcut;
-use tauri_plugin_global_shortcut::ShortcutState;
-use tauri_plugin_store::JsonValue;
-use tauri_plugin_store::StoreExt;
+use crate::common::MAIN_WINDOW_LABEL;
+use crate::{COCO_TAURI_STORE, hide_coco, show_coco};
+use tauri::{AppHandle, Manager, async_runtime};
+use tauri_plugin_global_shortcut::{GlobalShortcutExt, Shortcut, ShortcutState};
+use tauri_plugin_store::{JsonValue, StoreExt};
 
 /// Tauri's store is a key-value database, we use it to store our registered
 /// global shortcut.
@@ -22,8 +17,9 @@ const DEFAULT_SHORTCUT: &str = "command+shift+space";
 const DEFAULT_SHORTCUT: &str = "ctrl+shift+space";
 
 /// Set up the shortcut upon app start.
-pub fn enable_shortcut(app: &App) {
-    let store = app
+pub fn enable_shortcut(tauri_app_handle: &AppHandle) {
+    log::trace!("setting up Coco hotkey");
+    let store = tauri_app_handle
         .store(COCO_TAURI_STORE)
         .expect("creating a store should not fail");
 
@@ -38,7 +34,7 @@ pub fn enable_shortcut(app: &App) {
         let stored_shortcut = stored_shortcut_str
             .parse::<Shortcut>()
             .expect("stored shortcut string should be valid");
-        _register_shortcut_upon_start(app, stored_shortcut);
+        _register_shortcut_upon_start(tauri_app_handle, stored_shortcut);
     } else {
         store.set(
             COCO_GLOBAL_SHORTCUT,
@@ -47,21 +43,22 @@ pub fn enable_shortcut(app: &App) {
         let default_shortcut = DEFAULT_SHORTCUT
             .parse::<Shortcut>()
             .expect("default shortcut should never be invalid");
-        _register_shortcut_upon_start(app, default_shortcut);
+        _register_shortcut_upon_start(tauri_app_handle, default_shortcut);
     }
+    log::trace!("Coco hotkey has been set");
 }
 
 /// Get the stored shortcut as a string, same as [`_get_shortcut()`], except that
 /// this is a `tauri::command` interface.
 #[tauri::command]
-pub fn get_current_shortcut<R: Runtime>(app: AppHandle<R>) -> Result<String, String> {
+pub async fn get_current_shortcut(app: AppHandle) -> Result<String, String> {
     let shortcut = _get_shortcut(&app);
     Ok(shortcut)
 }
 
 /// Get the current shortcut and unregister it on the tauri side.
 #[tauri::command]
-pub fn unregister_shortcut<R: Runtime>(app: AppHandle<R>) {
+pub async fn unregister_shortcut(app: AppHandle) {
     let shortcut_str = _get_shortcut(&app);
     let shortcut = shortcut_str
         .parse::<Shortcut>()
@@ -74,9 +71,9 @@ pub fn unregister_shortcut<R: Runtime>(app: AppHandle<R>) {
 
 /// Change the global shortcut to `key`.
 #[tauri::command]
-pub fn change_shortcut<R: Runtime>(
-    app: AppHandle<R>,
-    _window: tauri::Window<R>,
+pub async fn change_shortcut(
+    app: AppHandle,
+    _window: tauri::Window,
     key: String,
 ) -> Result<(), String> {
     println!("key {}:", key);
@@ -98,23 +95,22 @@ pub fn change_shortcut<R: Runtime>(
 }
 
 /// Helper function to register a shortcut, used for shortcut updates.
-fn _register_shortcut<R: Runtime>(app: &AppHandle<R>, shortcut: Shortcut) {
+fn _register_shortcut(app: &AppHandle, shortcut: Shortcut) {
     app.global_shortcut()
         .on_shortcut(shortcut, move |app, scut, event| {
             if scut == &shortcut {
                 dbg!("shortcut pressed");
-                let main_window = app.get_window(MAIN_WINDOW_LABEL).unwrap();
+                let main_window = app.get_webview_window(MAIN_WINDOW_LABEL).unwrap();
                 if let ShortcutState::Pressed = event.state() {
+                    let app_handle = app.clone();
                     if main_window.is_visible().unwrap() {
-                        dbg!("hiding window");
-                        main_window.hide().unwrap();
+                        async_runtime::spawn(async move {
+                            hide_coco(app_handle).await;
+                        });
                     } else {
-                        dbg!("showing window");
-                        move_window_to_active_monitor(&main_window);
-                        main_window.set_visible_on_all_workspaces(true).unwrap();
-                        main_window.set_always_on_top(true).unwrap();
-                        main_window.set_focus().unwrap();
-                        main_window.show().unwrap();
+                        async_runtime::spawn(async move {
+                            show_coco(app_handle).await;
+                        });
                     }
                 }
             }
@@ -123,27 +119,25 @@ fn _register_shortcut<R: Runtime>(app: &AppHandle<R>, shortcut: Shortcut) {
         .unwrap();
 }
 
-use crate::common::MAIN_WINDOW_LABEL;
-
 /// Helper function to register a shortcut, used to set up the shortcut up App's first start.
-fn _register_shortcut_upon_start(app: &App, shortcut: Shortcut) {
-    let handler = app.app_handle();
-    handler
+fn _register_shortcut_upon_start(tauri_app_handle: &AppHandle, shortcut: Shortcut) {
+    tauri_app_handle
         .plugin(
             tauri_plugin_global_shortcut::Builder::new()
                 .with_handler(move |app, scut, event| {
                     if scut == &shortcut {
-                        let window = app.get_window(MAIN_WINDOW_LABEL).unwrap();
+                        let window = app.get_webview_window(MAIN_WINDOW_LABEL).unwrap();
                         if let ShortcutState::Pressed = event.state() {
+                            let app_handle = app.clone();
+
                             if window.is_visible().unwrap() {
-                                window.hide().unwrap();
+                                async_runtime::spawn(async move {
+                                    hide_coco(app_handle).await;
+                                });
                             } else {
-                                // dbg!("showing window");
-                                move_window_to_active_monitor(&window);
-                                window.set_visible_on_all_workspaces(true).unwrap();
-                                window.set_always_on_top(true).unwrap();
-                                window.set_focus().unwrap();
-                                window.show().unwrap();
+                                async_runtime::spawn(async move {
+                                    show_coco(app_handle).await;
+                                });
                             }
                         }
                     }
@@ -151,11 +145,14 @@ fn _register_shortcut_upon_start(app: &App, shortcut: Shortcut) {
                 .build(),
         )
         .unwrap();
-    app.global_shortcut().register(shortcut).unwrap();
+    tauri_app_handle
+        .global_shortcut()
+        .register(shortcut)
+        .unwrap();
 }
 
 /// Helper function to get the stored global shortcut, as a string.
-pub fn _get_shortcut<R: Runtime>(app: &AppHandle<R>) -> String {
+pub fn _get_shortcut(app: &AppHandle) -> String {
     let store = app
         .get_store(COCO_TAURI_STORE)
         .expect("store should be loaded or created");

src-tauri/src/util/app_lang.rs

@@ -0,0 +1,62 @@
+//! Configuration entry App language is persisted in the frontend code, but we
+//! need to access it on the backend.
+//!
+//! So we duplicate it here **in the MEMORY** and expose a setter method to the
+//! frontend so that the value can be updated and stay update-to-date.
+
+use tokio::sync::RwLock;
+
+#[derive(Debug, Clone, Copy, PartialEq)]
+#[allow(non_camel_case_types)]
+pub(crate) enum Lang {
+    en_US,
+    zh_CN,
+}
+
+impl std::fmt::Display for Lang {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Lang::en_US => write!(f, "en_US"),
+            Lang::zh_CN => write!(f, "zh_CN"),
+        }
+    }
+}
+
+/// Frontend code uses "en" and "zh" to represent the Application language.
+///
+/// This impl is not meant to be used as a parser for locale strings such as
+/// "en_US" or "zh_CN".
+impl std::str::FromStr for Lang {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "en" => Ok(Lang::en_US),
+            "zh" => Ok(Lang::zh_CN),
+            _ => Err(format!("Invalid language: {}", s)),
+        }
+    }
+}
+
+/// Cache the language config in memory.
+static APP_LANG: RwLock<Option<Lang>> = RwLock::const_new(None);
+
+/// Update the in-memory cached `APP_LANG` config.
+#[tauri::command]
+pub(crate) async fn update_app_lang(lang: String) {
+    let app_lang = lang.parse::<Lang>().unwrap_or_else(|e| {
+        panic!(
+            "invalid argument [{}], could not parse it to [struct Lang], parsing error [{}]",
+            lang, e
+        )
+    });
+
+    let mut write_guard = APP_LANG.write().await;
+    *write_guard = Some(app_lang);
+}
+
+/// Helper getter method to handle the `None` case.
+pub(crate) async fn get_app_lang() -> Lang {
+    let opt_lang = *APP_LANG.read().await;
+    opt_lang.expect("frontend code did not invoke [update_app_lang()] to set the APP_LANG")
+}

src-tauri/src/util/file.rs

@@ -0,0 +1,174 @@
+#[derive(Debug, Clone, PartialEq, Copy)]
+pub(crate) enum FileType {
+    Folder,
+    JPEGImage,
+    PNGImage,
+    PDFDocument,
+    PlainTextDocument,
+    MicrosoftWordDocument,
+    MicrosoftExcelSpreadsheet,
+    AudioFile,
+    VideoFile,
+    CHeaderFile,
+    TOMLDocument,
+    RustScript,
+    CSourceCode,
+    MarkdownDocument,
+    TerminalSettings,
+    ZipArchive,
+    Dmg,
+    Html,
+    Json,
+    Xml,
+    Yaml,
+    Css,
+    Vue,
+    React,
+    Sql,
+    Csv,
+    Javascript,
+    Lnk,
+    Typescript,
+    Python,
+    Java,
+    Golang,
+    Ruby,
+    Php,
+    Sass,
+    Sketch,
+    AdobeAi,
+    AdobePsd,
+    AdobePr,
+    AdobeAu,
+    AdobeAe,
+    AdobeLr,
+    AdobeXd,
+    AdobeFl,
+    AdobeId,
+    Svg,
+    Epub,
+    Unknown,
+}
+
+async fn get_file_type(path: &str) -> FileType {
+    let path = camino::Utf8Path::new(path);
+
+    // stat() is more precise than file extension, use it if possible.
+    if path.is_dir() {
+        return FileType::Folder;
+    }
+
+    let Some(ext) = path.extension() else {
+        return FileType::Unknown;
+    };
+
+    let ext = ext.to_lowercase();
+    match ext.as_str() {
+        "pdf" => FileType::PDFDocument,
+        "txt" | "text" => FileType::PlainTextDocument,
+        "doc" | "docx" => FileType::MicrosoftWordDocument,
+        "xls" | "xlsx" => FileType::MicrosoftExcelSpreadsheet,
+        "jpg" | "jpeg" => FileType::JPEGImage,
+        "png" => FileType::PNGImage,
+        "mp3" | "wav" | "flac" | "aac" | "ogg" | "m4a" => FileType::AudioFile,
+        "mp4" | "avi" | "mov" | "mkv" | "wmv" | "flv" | "webm" => FileType::VideoFile,
+        "h" | "hpp" => FileType::CHeaderFile,
+        "c" | "cpp" | "cc" | "cxx" => FileType::CSourceCode,
+        "toml" => FileType::TOMLDocument,
+        "rs" => FileType::RustScript,
+        "md" | "markdown" => FileType::MarkdownDocument,
+        "terminal" => FileType::TerminalSettings,
+        "zip" | "rar" | "7z" | "tar" | "gz" | "bz2" => FileType::ZipArchive,
+        "dmg" => FileType::Dmg,
+        "html" | "htm" => FileType::Html,
+        "json" => FileType::Json,
+        "xml" => FileType::Xml,
+        "yaml" | "yml" => FileType::Yaml,
+        "css" => FileType::Css,
+        "vue" => FileType::Vue,
+        "jsx" | "tsx" => FileType::React,
+        "sql" => FileType::Sql,
+        "csv" => FileType::Csv,
+        "js" | "mjs" => FileType::Javascript,
+        "ts" => FileType::Typescript,
+        "py" | "pyw" => FileType::Python,
+        "java" => FileType::Java,
+        "go" => FileType::Golang,
+        "rb" => FileType::Ruby,
+        "php" => FileType::Php,
+        "sass" | "scss" => FileType::Sass,
+        "sketch" => FileType::Sketch,
+        "ai" => FileType::AdobeAi,
+        "psd" => FileType::AdobePsd,
+        "prproj" => FileType::AdobePr,
+        "aup" | "aup3" => FileType::AdobeAu,
+        "aep" => FileType::AdobeAe,
+        "lrcat" => FileType::AdobeLr,
+        "xd" => FileType::AdobeXd,
+        "fla" => FileType::AdobeFl,
+        "indd" => FileType::AdobeId,
+        "svg" => FileType::Svg,
+        "epub" => FileType::Epub,
+        "lnk" => FileType::Lnk,
+        _ => FileType::Unknown,
+    }
+}
+
+fn type_to_icon(ty: FileType) -> &'static str {
+    match ty {
+        FileType::Folder => "font_file_folder",
+        FileType::JPEGImage => "font_file_image",
+        FileType::PNGImage => "font_file_image",
+        FileType::PDFDocument => "font_file_document_pdf",
+        FileType::PlainTextDocument => "font_file_txt",
+        FileType::MicrosoftWordDocument => "font_file_document_word",
+        FileType::MicrosoftExcelSpreadsheet => "font_file_spreadsheet_excel",
+        FileType::AudioFile => "font_file_audio",
+        FileType::VideoFile => "font_file_video",
+        FileType::CHeaderFile => "font_file_csource",
+        FileType::TOMLDocument => "font_file_toml",
+        FileType::RustScript => "font_file_rustscript1",
+        FileType::CSourceCode => "font_file_csource",
+        FileType::MarkdownDocument => "font_file_markdown",
+        FileType::TerminalSettings => "font_file_terminal1",
+        FileType::ZipArchive => "font_file_zip",
+        FileType::Dmg => "font_file_dmg",
+        FileType::Html => "font_file_html",
+        FileType::Json => "font_file_json",
+        FileType::Xml => "font_file_xml",
+        FileType::Yaml => "font_file_yaml",
+        FileType::Css => "font_file_css",
+        FileType::Vue => "font_file_vue",
+        FileType::React => "font_file_react",
+        FileType::Sql => "font_file_sql",
+        FileType::Csv => "font_file_csv",
+        FileType::Javascript => "font_file_javascript",
+        FileType::Lnk => "font_file_lnk",
+        FileType::Typescript => "font_file_typescript",
+        FileType::Python => "font_file_python",
+        FileType::Java => "font_file_java",
+        FileType::Golang => "font_file_golang",
+        FileType::Ruby => "font_file_ruby",
+        FileType::Php => "font_file_php",
+        FileType::Sass => "font_file_sass",
+        FileType::Sketch => "font_file_sketch",
+        FileType::AdobeAi => "font_file_adobe_ai",
+        FileType::AdobePsd => "font_file_adobe_psd",
+        FileType::AdobePr => "font_file_adobe_pr",
+        FileType::AdobeAu => "font_file_adobe_au",
+        FileType::AdobeAe => "font_file_adobe_ae",
+        FileType::AdobeLr => "font_file_adobe_lr",
+        FileType::AdobeXd => "font_file_adobe_xd",
+        FileType::AdobeFl => "font_file_adobe_fl",
+        FileType::AdobeId => "font_file_adobe_id",
+        FileType::Svg => "font_file_svg",
+        FileType::Epub => "font_file_epub",
+        FileType::Unknown => "font_file_unknown",
+    }
+}
+
+#[tauri::command]
+pub(crate) async fn get_file_icon(path: String) -> &'static str {
+    let ty = get_file_type(path.as_str()).await;
+    type_to_icon(ty)
+}

src-tauri/src/util/mod.rs

@@ -0,0 +1,159 @@
+pub(crate) mod app_lang;
+pub(crate) mod file;
+pub(crate) mod platform;
+pub(crate) mod system_lang;
+pub(crate) mod updater;
+
+use std::{path::Path, process::Command};
+use tauri::AppHandle;
+use tauri_plugin_shell::ShellExt;
+
+/// We use this env variable to determine the DE on Linux.
+const XDG_CURRENT_DESKTOP: &str = "XDG_CURRENT_DESKTOP";
+
+#[derive(Debug, PartialEq)]
+enum LinuxDesktopEnvironment {
+    Gnome,
+    Kde,
+    Unsupported { xdg_current_desktop: String },
+}
+
+impl LinuxDesktopEnvironment {
+    // This impl is based on: https://wiki.archlinux.org/title/Desktop_entries#Usage
+    fn launch_app_via_desktop_file<P: AsRef<Path>>(&self, file: P) -> Result<(), String> {
+        let path = file.as_ref();
+        if !path.try_exists().map_err(|e| e.to_string())? {
+            return Err(format!("desktop file [{}] does not exist", path.display()));
+        }
+
+        let cmd_output = match self {
+            Self::Gnome => {
+                let uri = path
+                    .file_stem()
+                    .expect("the desktop file should contain a file stem part");
+
+                Command::new("gtk-launch")
+                    .arg(uri)
+                    .output()
+                    .map_err(|e| e.to_string())?
+            }
+            Self::Kde => Command::new("kde-open")
+                .arg(path)
+                .output()
+                .map_err(|e| e.to_string())?,
+            Self::Unsupported {
+                xdg_current_desktop,
+            } => {
+                return Err(format!(
+                    "Cannot open apps as this Linux desktop environment [{}] is not supported",
+                    xdg_current_desktop
+                ));
+            }
+        };
+
+        if !cmd_output.status.success() {
+            return Err(format!(
+                "failed to launch app via desktop file [{}], underlying command stderr [{}]",
+                path.display(),
+                String::from_utf8_lossy(&cmd_output.stderr)
+            ));
+        }
+
+        Ok(())
+    }
+}
+
+/// None means that it is likely that we do not have a desktop environment.
+fn get_linux_desktop_environment() -> Option<LinuxDesktopEnvironment> {
+    let de_os_str = std::env::var_os(XDG_CURRENT_DESKTOP)?;
+    let de_str = de_os_str.into_string().unwrap_or_else(|_os_string| {
+        panic!("${} should be UTF-8 encoded", XDG_CURRENT_DESKTOP);
+    });
+
+    let de = match de_str.as_str() {
+        "GNOME" => LinuxDesktopEnvironment::Gnome,
+        // Ubuntu uses "ubuntu:GNOME" instead of just "GNOME", they really love
+        // their distro name.
+        "ubuntu:GNOME" => LinuxDesktopEnvironment::Gnome,
+        "KDE" => LinuxDesktopEnvironment::Kde,
+
+        _ => LinuxDesktopEnvironment::Unsupported {
+            xdg_current_desktop: de_str,
+        },
+    };
+
+    Some(de)
+}
+
+/// Homemade open() function to support open Linux applications via the `.desktop` file.
+//
+// tauri_plugin_shell::open() is deprecated, but we still use it.
+#[allow(deprecated)]
+pub async fn open(app_handle: AppHandle, path: String) -> Result<(), String> {
+    if cfg!(target_os = "linux") {
+        let borrowed_path = Path::new(&path);
+        if let Some(file_extension) = borrowed_path.extension() {
+            if file_extension == "desktop" {
+                let desktop_environment = get_linux_desktop_environment().expect("The Linux OS is running without a desktop, Coco could never run in such an environment");
+                return desktop_environment.launch_app_via_desktop_file(path);
+            }
+        }
+    }
+
+    app_handle
+        .shell()
+        .open(path, None)
+        .map_err(|e| e.to_string())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // This test modifies env var XDG_CURRENT_DESKTOP, which is kinda unsafe
+    // but considering this is just test, it is ok to do so.
+    #[test]
+    fn test_get_linux_desktop_environment() {
+        // SAFETY: Rust code won't modify/read XDG_CURRENT_DESKTOP concurrently, we
+        // have no guarantee from the underlying C code.
+        unsafe {
+            // Save the original value if it exists
+            let original_value = std::env::var_os(XDG_CURRENT_DESKTOP);
+
+            // Test when XDG_CURRENT_DESKTOP is not set
+            std::env::remove_var(XDG_CURRENT_DESKTOP);
+            assert!(get_linux_desktop_environment().is_none());
+
+            // Test GNOME
+            std::env::set_var(XDG_CURRENT_DESKTOP, "GNOME");
+            let result = get_linux_desktop_environment();
+            assert_eq!(result.unwrap(), LinuxDesktopEnvironment::Gnome);
+
+            // Test ubuntu:GNOME
+            std::env::set_var(XDG_CURRENT_DESKTOP, "ubuntu:GNOME");
+            let result = get_linux_desktop_environment();
+            assert_eq!(result.unwrap(), LinuxDesktopEnvironment::Gnome);
+
+            // Test KDE
+            std::env::set_var(XDG_CURRENT_DESKTOP, "KDE");
+            let result = get_linux_desktop_environment();
+            assert_eq!(result.unwrap(), LinuxDesktopEnvironment::Kde);
+
+            // Test unsupported desktop environment
+            std::env::set_var(XDG_CURRENT_DESKTOP, "XFCE");
+            let result = get_linux_desktop_environment();
+            assert_eq!(
+                result.unwrap(),
+                LinuxDesktopEnvironment::Unsupported {
+                    xdg_current_desktop: "XFCE".into()
+                }
+            );
+
+            // Restore the original value
+            match original_value {
+                Some(value) => std::env::set_var(XDG_CURRENT_DESKTOP, value),
+                None => std::env::remove_var(XDG_CURRENT_DESKTOP),
+            }
+        }
+    }
+}

src-tauri/src/util/platform.rs

@@ -0,0 +1,61 @@
+use derive_more::Display;
+use serde::{Deserialize, Serialize};
+use std::borrow::Cow;
+use strum::EnumCount;
+use strum::VariantArray;
+
+#[derive(
+    Debug,
+    Deserialize,
+    Serialize,
+    Copy,
+    Clone,
+    Hash,
+    PartialEq,
+    Eq,
+    Display,
+    EnumCount,
+    VariantArray,
+)]
+#[serde(rename_all(serialize = "lowercase", deserialize = "lowercase"))]
+pub(crate) enum Platform {
+    #[display("macOS")]
+    Macos,
+    #[display("Linux")]
+    Linux,
+    #[display("windows")]
+    Windows,
+}
+
+impl Platform {
+    /// Helper function to determine the current platform.
+    pub(crate) fn current() -> Platform {
+        let os_str = std::env::consts::OS;
+        serde_plain::from_str(os_str).unwrap_or_else(|_e| {
+        panic!("std::env::consts::OS is [{}], which is not a valid value for [enum Platform], valid values: {:?}", os_str, Self::VARIANTS.iter().map(|platform|platform.to_string()).collect::<Vec<String>>());
+      })
+    }
+
+    /// Return the `X-OS-NAME` HTTP request header.
+    pub(crate) fn to_os_name_http_header_str(&self) -> Cow<'static, str> {
+        match self {
+            Self::Macos => Cow::Borrowed("macos"),
+            Self::Windows => Cow::Borrowed("windows"),
+            // For Linux, we need the actual distro `ID`, not just a "linux".
+            Self::Linux => Cow::Owned(sysinfo::System::distribution_id()),
+        }
+    }
+
+    /// Returns the number of platforms supported by Coco.
+    //
+    // a.k.a., the number of this enum's variants.
+    pub(crate) fn num_of_supported_platforms() -> usize {
+        Platform::COUNT
+    }
+
+    /// Returns a set that contains all the platforms.
+    #[cfg(test)] // currently, only used in tests
+    pub(crate) fn all() -> std::collections::HashSet<Self> {
+        Platform::VARIANTS.into_iter().copied().collect()
+    }
+}

src-tauri/src/util/system_lang.rs

@@ -0,0 +1,13 @@
+use sys_locale::get_locale;
+
+/// Helper function to get the system language.
+///
+/// We cannot return `enum Lang` here because Coco has limited language support
+/// but the OS supports many more languages.
+pub(crate) fn get_system_lang() -> String {
+    // fall back to English (general) when we cannot get the locale
+    //
+    // We replace '-' with '_' in applications-rs, to make the locales match,
+    // we need to do this here as well.
+    get_locale().unwrap_or("en".into()).replace('-', "_")
+}