Export Indexed DB

Export indexed db
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// ==UserScript==
// @name         Export Indexed DB
// @namespace    rbits.export-indexeddb
// @version      1.0.0
// @description  Export indexed db
// @author       rbits
// @license      MIT
// @match        https://*/*
// @grant        GM_registerMenuCommand
// @grant        GM_setClipboard
// ==/UserScript==

async function exportIndexedDb() {
    const databases = await window.indexedDB.databases();

    const outputObj = {};
    for (const database of databases) {
        const databaseObj = await exportDatabase(database.name);
        outputObj[database.name] = databaseObj;
    }

    const json = JSON.stringify(outputObj);
    GM_setClipboard(json, 'text', () => {
        alert('Copied to clipboard');
    });
}

const exportDatabase = (name) => new Promise((resolve, reject) => {
    const request = window.indexedDB.open(name);
    request.onsuccess = async (event) => {
        const db = event.target.result;
        const objectStoreNames = db.objectStoreNames;

        const outputObj = {};
        for (const objectStoreName of objectStoreNames) {
            const objectStore = await exportObjectStore(db, objectStoreName);
            outputObj[objectStoreName] = objectStore;
        }

        resolve(outputObj);
    };
});

const exportObjectStore = (db, objectStoreName) => new Promise((resolve, reject) => {
    const objectStore = db.transaction(objectStoreName).objectStore(objectStoreName);
    const request = objectStore.getAllKeys();
    request.onsuccess = async (event) => {
        const keys = event.target.result;

        const outputObj = {};
        for (const key of keys) {
            const value = await getFromObjectStore(objectStore, key);
            outputObj[key] = value;
        };

        resolve(outputObj);
    };
});


const getFromObjectStore = (objectStore, key) => new Promise((resolve, reject) => {
    const request = objectStore.get(key);
    request.onsuccess = (event) => {
        resolve(event.target.result);
    };
});


(function() {
    'use strict';

    GM_registerMenuCommand('Export', exportIndexedDb);
})();