forked from mirrors/gecko-dev
121 lines
3.2 KiB
JavaScript
121 lines
3.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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ChromeUtils.defineModuleGetter(
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this,
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"IndexedDB",
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"resource://gre/modules/IndexedDB.jsm"
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);
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this.ActivityStreamStorage = class ActivityStreamStorage {
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/**
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* @param storeNames Array of strings used to create all the required stores
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*/
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constructor({ storeNames, telemetry }) {
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if (!storeNames) {
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throw new Error("storeNames required");
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}
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this.dbName = "ActivityStream";
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this.dbVersion = 3;
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this.storeNames = storeNames;
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this.telemetry = telemetry;
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}
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get db() {
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return this._db || (this._db = this.createOrOpenDb());
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}
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/**
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* Public method that binds the store required by the consumer and exposes
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* the private db getters and setters.
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*
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* @param storeName String name of desired store
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*/
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getDbTable(storeName) {
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if (this.storeNames.includes(storeName)) {
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return {
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get: this._get.bind(this, storeName),
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getAll: this._getAll.bind(this, storeName),
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set: this._set.bind(this, storeName),
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};
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}
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throw new Error(`Store name ${storeName} does not exist.`);
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}
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async _getStore(storeName) {
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return (await this.db).objectStore(storeName, "readwrite");
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}
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_get(storeName, key) {
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return this._requestWrapper(async () =>
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(await this._getStore(storeName)).get(key)
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);
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}
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_getAll(storeName) {
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return this._requestWrapper(async () =>
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(await this._getStore(storeName)).getAll()
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);
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}
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_set(storeName, key, value) {
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return this._requestWrapper(async () =>
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(await this._getStore(storeName)).put(value, key)
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);
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}
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_openDatabase() {
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return IndexedDB.open(this.dbName, { version: this.dbVersion }, db => {
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// If provided with array of objectStore names we need to create all the
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// individual stores
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this.storeNames.forEach(store => {
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if (!db.objectStoreNames.contains(store)) {
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this._requestWrapper(() => db.createObjectStore(store));
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}
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});
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});
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}
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/**
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* createOrOpenDb - Open a db (with this.dbName) if it exists.
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* If it does not exist, create it.
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* If an error occurs, deleted the db and attempt to
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* re-create it.
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* @returns Promise that resolves with a db instance
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*/
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async createOrOpenDb() {
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try {
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const db = await this._openDatabase();
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return db;
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} catch (e) {
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if (this.telemetry) {
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this.telemetry.handleUndesiredEvent({ event: "INDEXEDDB_OPEN_FAILED" });
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}
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await IndexedDB.deleteDatabase(this.dbName);
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return this._openDatabase();
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}
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}
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async _requestWrapper(request) {
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let result = null;
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try {
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result = await request();
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} catch (e) {
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if (this.telemetry) {
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this.telemetry.handleUndesiredEvent({ event: "TRANSACTION_FAILED" });
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}
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throw e;
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}
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return result;
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}
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};
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function getDefaultOptions(options) {
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return { collapsed: !!options.collapsed };
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}
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const EXPORTED_SYMBOLS = ["ActivityStreamStorage", "getDefaultOptions"];
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