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feat: add notebook merging

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thecodrr
2021-02-25 19:41:17 +05:00
parent 952aa5e58c
commit 03e21221c7
4 changed files with 129 additions and 7 deletions
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42
packages/core/collections/notebooks.js
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@@ -6,12 +6,46 @@ import { CHECK_IDS, sendCheckUserStatusEvent } from "../common";
import { qclone } from "qclone";
export default class Notebooks extends Collection {
async merge(remoteNotebook) {
const id = remoteNotebook.id || getId();
let localNotebook = this._collection.getItem(id);
if (localNotebook && localNotebook.topics?.length) {
// merge new and old topics
// We need to handle 3 cases:
for (let oldTopic of localNotebook.topics) {
const newTopicIndex = remoteNotebook.topics.findIndex(
(t) => t.id === oldTopic.id
);
const newTopic = remoteNotebook.topics[newTopicIndex];
// CASE 1: if topic exists in old notebook but not in new notebook, it's deleted.
// However, if the dateEdited of topic in the old notebook is > the dateEdited of newNotebook
// it was newly added or edited so add it to the new notebook.
if (!newTopic && oldTopic.dateEdited > remoteNotebook.dateEdited) {
remoteNotebook.topics.push(oldTopic);
}
// CASE 2: if topic exists in new notebook but not in old notebook, it's new.
// This case will be automatically handled as the new notebook is our source of truth.
// CASE 3: if topic exists in both notebooks:
// if oldTopic.dateEdited > newTopic.dateEdited: we keep oldTopic.
if (newTopic && oldTopic.dateEdited > newTopic.dateEdited) {
remoteNotebook.topics[newTopicIndex] = oldTopic;
}
}
}
return await this._collection.addItem(remoteNotebook);
}
async add(notebookArg) {
if (!notebookArg) throw new Error("Notebook cannot be undefined or null.");
if (notebookArg.remote) {
return await this._collection.addItem(notebookArg);
}
if (notebookArg.remote)
throw new Error(
"Please use db.notebooks.merge to merge remote notebooks"
);
//TODO reliably and efficiently check for duplicates.
const id = notebookArg.id || getId();