88 lines
2.2 KiB
JavaScript
88 lines
2.2 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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const lazy = {};
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ChromeUtils.defineESModuleGetters(lazy, {
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JSONFile: "resource://gre/modules/JSONFile.sys.mjs",
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});
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// Lazy-load JSON file that backs Storage instances.
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ChromeUtils.defineLazyGetter(lazy, "lazyStore", async function () {
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const path = PathUtils.join(
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PathUtils.profileDir,
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"shield-recipe-client.json"
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);
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const store = new lazy.JSONFile({ path });
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await store.load();
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return store;
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});
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export var Storage = class {
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constructor(prefix) {
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this.prefix = prefix;
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}
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/**
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* Clear ALL storage data and save to the disk.
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*/
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static async clearAllStorage() {
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const store = await lazy.lazyStore;
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store.data = {};
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store.saveSoon();
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}
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/**
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* Sets an item in the prefixed storage.
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* @returns {Promise}
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* @resolves With the stored value, or null.
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* @rejects Javascript exception.
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*/
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async getItem(name) {
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const store = await lazy.lazyStore;
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const namespace = store.data[this.prefix] || {};
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return namespace[name] || null;
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}
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/**
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* Sets an item in the prefixed storage.
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* @returns {Promise}
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* @resolves When the operation is completed successfully
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* @rejects Javascript exception.
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*/
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async setItem(name, value) {
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const store = await lazy.lazyStore;
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if (!(this.prefix in store.data)) {
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store.data[this.prefix] = {};
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}
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store.data[this.prefix][name] = value;
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store.saveSoon();
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}
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/**
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* Removes a single item from the prefixed storage.
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* @returns {Promise}
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* @resolves When the operation is completed successfully
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* @rejects Javascript exception.
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*/
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async removeItem(name) {
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const store = await lazy.lazyStore;
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if (this.prefix in store.data) {
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delete store.data[this.prefix][name];
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store.saveSoon();
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}
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}
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/**
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* Clears all storage for the prefix.
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* @returns {Promise}
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* @resolves When the operation is completed successfully
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* @rejects Javascript exception.
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*/
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async clear() {
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const store = await lazy.lazyStore;
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store.data[this.prefix] = {};
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store.saveSoon();
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}
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};
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