forked from mirrors/gecko-dev
98 lines
2.4 KiB
JavaScript
98 lines
2.4 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
"use strict";
|
|
|
|
const { XPCOMUtils } = ChromeUtils.importESModule(
|
|
"resource://gre/modules/XPCOMUtils.sys.mjs"
|
|
);
|
|
|
|
const lazy = {};
|
|
|
|
ChromeUtils.defineModuleGetter(
|
|
lazy,
|
|
"JSONFile",
|
|
"resource://gre/modules/JSONFile.jsm"
|
|
);
|
|
|
|
var EXPORTED_SYMBOLS = ["Storage"];
|
|
|
|
// Lazy-load JSON file that backs Storage instances.
|
|
XPCOMUtils.defineLazyGetter(lazy, "lazyStore", async function() {
|
|
const path = PathUtils.join(
|
|
PathUtils.profileDir,
|
|
"shield-recipe-client.json"
|
|
);
|
|
const store = new lazy.JSONFile({ path });
|
|
await store.load();
|
|
return store;
|
|
});
|
|
|
|
var Storage = class {
|
|
constructor(prefix) {
|
|
this.prefix = prefix;
|
|
}
|
|
|
|
/**
|
|
* Clear ALL storage data and save to the disk.
|
|
*/
|
|
static async clearAllStorage() {
|
|
const store = await lazy.lazyStore;
|
|
store.data = {};
|
|
store.saveSoon();
|
|
}
|
|
|
|
/**
|
|
* Sets an item in the prefixed storage.
|
|
* @returns {Promise}
|
|
* @resolves With the stored value, or null.
|
|
* @rejects Javascript exception.
|
|
*/
|
|
async getItem(name) {
|
|
const store = await lazy.lazyStore;
|
|
const namespace = store.data[this.prefix] || {};
|
|
return namespace[name] || null;
|
|
}
|
|
|
|
/**
|
|
* Sets an item in the prefixed storage.
|
|
* @returns {Promise}
|
|
* @resolves When the operation is completed successfully
|
|
* @rejects Javascript exception.
|
|
*/
|
|
async setItem(name, value) {
|
|
const store = await lazy.lazyStore;
|
|
if (!(this.prefix in store.data)) {
|
|
store.data[this.prefix] = {};
|
|
}
|
|
store.data[this.prefix][name] = value;
|
|
store.saveSoon();
|
|
}
|
|
|
|
/**
|
|
* Removes a single item from the prefixed storage.
|
|
* @returns {Promise}
|
|
* @resolves When the operation is completed successfully
|
|
* @rejects Javascript exception.
|
|
*/
|
|
async removeItem(name) {
|
|
const store = await lazy.lazyStore;
|
|
if (this.prefix in store.data) {
|
|
delete store.data[this.prefix][name];
|
|
store.saveSoon();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Clears all storage for the prefix.
|
|
* @returns {Promise}
|
|
* @resolves When the operation is completed successfully
|
|
* @rejects Javascript exception.
|
|
*/
|
|
async clear() {
|
|
const store = await lazy.lazyStore;
|
|
store.data[this.prefix] = {};
|
|
store.saveSoon();
|
|
}
|
|
};
|