71c3e0c7a8
* chrome.storage.onChanged supported in own pages * values are stored in the background page * chrome.storage in own pages accesses that background storage
86 lines
2.7 KiB
JavaScript
86 lines
2.7 KiB
JavaScript
/* global loadScript */
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'use strict';
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// eslint-disable-next-line no-var
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var [chromeLocal, chromeSync] = (() => {
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const native = 'sync' in chrome.storage &&
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!chrome.runtime.id.includes('@temporary');
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if (!native && BG !== window) {
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setupOnChangeRelay();
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}
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return [
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createWrapper('local'),
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createWrapper('sync'),
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];
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function createWrapper(name) {
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if (!native) createDummyStorage(name);
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const storage = chrome.storage[name];
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const wrapper = {
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get: data => new Promise(resolve => storage.get(data, resolve)),
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set: data => new Promise(resolve => storage.set(data, () => resolve(data))),
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remove: data => new Promise(resolve => storage.remove(data, resolve)),
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getValue: key => wrapper.get(key).then(data => data[key]),
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setValue: (key, value) => wrapper.set({[key]: value}),
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getLZValue: key => wrapper.getLZValues([key]).then(data => data[key]),
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getLZValues: keys =>
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Promise.all([
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wrapper.get(keys),
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loadLZStringScript(),
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]).then(([data = {}, LZString]) => {
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for (const key of keys) {
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const value = data[key];
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data[key] = value && tryJSONparse(LZString.decompressFromUTF16(value));
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}
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return data;
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}),
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setLZValue: (key, value) =>
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loadLZStringScript().then(LZString =>
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wrapper.set({
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[key]: LZString.compressToUTF16(JSON.stringify(value)),
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})),
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loadLZStringScript,
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};
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return wrapper;
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}
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function createDummyStorage(name) {
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chrome.storage[name] = {
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get: (data, cb) => API.dummyStorageGet({data, name}).then(cb),
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set: (data, cb) => API.dummyStorageSet({data, name}).then(cb),
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remove: (data, cb) => API.dummyStorageRemove({data, name}).then(cb),
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};
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}
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function loadLZStringScript() {
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return window.LZString ?
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Promise.resolve(window.LZString) :
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loadScript('/vendor/lz-string/lz-string-unsafe.js').then(() =>
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(window.LZString = window.LZString || window.LZStringUnsafe));
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}
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function setupOnChangeRelay() {
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const listeners = new Set();
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const onMessage = msg => {
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if (!msg.dummyStorageChanges) return;
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for (const fn of listeners.values()) {
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fn(msg.dummyStorageChanges, msg.dummyStorageName);
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}
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};
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Object.assign(chrome.storage.onChanged, {
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addListener(fn) {
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if (!listeners.size) chrome.runtime.onMessage.addListener(onMessage);
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listeners.add(fn);
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},
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hasListener: fn => listeners.has(fn),
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removeListener(fn) {
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listeners.delete(fn);
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if (!listeners.size) chrome.runtime.onMessage.removeListener(onMessage);
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}
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});
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}
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})();
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