mirror of
https://github.com/streetwriters/notesnook.git
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109 lines
3.2 KiB
TypeScript
109 lines
3.2 KiB
TypeScript
/*
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This file is part of the Notesnook project (https://notesnook.com/)
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Copyright (C) 2023 Streetwriters (Private) Limited
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import { lazify } from "../utils/lazify";
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import { db } from "./db";
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async function download(hash: string) {
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const attachment = db.attachments?.attachment(hash);
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if (!attachment) return;
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const downloadResult = await db.fs?.downloadFile(
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attachment.metadata.hash,
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attachment.metadata.hash,
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attachment.chunkSize,
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attachment.metadata
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);
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if (!downloadResult) throw new Error("Failed to download file.");
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const key = await db.attachments?.decryptKey(attachment.key);
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if (!key) throw new Error("Invalid key for attachment.");
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return { key, attachment };
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}
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export async function saveAttachment(hash: string) {
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const response = await download(hash);
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if (!response) return;
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const { attachment, key } = response;
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await lazify(import("../interfaces/fs"), ({ default: FS }) =>
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FS.saveFile(attachment.metadata.hash, {
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key,
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iv: attachment.iv,
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name: attachment.metadata.filename,
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type: attachment.metadata.type,
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isUploaded: !!attachment.dateUploaded
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})
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);
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}
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type OutputTypeToReturnType = {
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blob: Blob;
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base64: string;
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text: string;
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};
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export async function downloadAttachment<
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TType extends "blob" | "base64" | "text",
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TOutputType = OutputTypeToReturnType[TType]
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>(hash: string, type: TType): Promise<TOutputType | undefined> {
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const response = await download(hash);
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if (!response) return;
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const { attachment, key } = response;
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if (type === "base64" || type === "text")
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return (await db.attachments?.read(hash, type)) as TOutputType;
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const blob = await lazify(import("../interfaces/fs"), ({ default: FS }) =>
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FS.decryptFile(attachment.metadata.hash, {
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key,
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iv: attachment.iv,
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name: attachment.metadata.filename,
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type: attachment.metadata.type,
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isUploaded: !!attachment.dateUploaded
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})
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);
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if (!blob) return;
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return blob as TOutputType;
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}
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export async function checkAttachment(hash: string) {
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const attachment = db.attachments?.attachment(hash);
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if (!attachment) return { failed: "Attachment not found." };
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try {
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const size = await lazify(import("../interfaces/fs"), ({ default: FS }) =>
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FS.getUploadedFileSize(hash)
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);
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if (size <= 0) return { failed: "File length is 0." };
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} catch (e) {
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return { failed: e instanceof Error ? e.message : "Unknown error." };
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}
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return { success: true };
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}
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const ABYTES = 17;
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export function getTotalSize(attachments: any[]) {
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let size = 0;
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for (const attachment of attachments) {
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size += attachment.length + ABYTES;
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}
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return size;
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}
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