0be8e72d6f
Use chrome.storage.sync to store preferences instead of chrome.storage.local, to allow settings to be synchronized if the user chooses to sign in in Chrome and enables synchronization of extension preferences.
70 lines
2.2 KiB
JavaScript
70 lines
2.2 KiB
JavaScript
/*
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Copyright 2016 Mozilla Foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/* globals chrome */
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(function() {
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'use strict';
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var storageLocal = chrome.storage.local;
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var storageSync = chrome.storage.sync;
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if (!storageSync) {
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// No sync storage area - nothing to migrate to.
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return;
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}
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getStorageNames(function(storageKeys) {
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storageLocal.get(storageKeys, function(values) {
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if (!values || !Object.keys(values).length) {
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// No local storage - nothing to migrate.
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return;
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}
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migrateToSyncStorage(values);
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});
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});
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function getStorageNames(callback) {
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var x = new XMLHttpRequest();
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var schema_location = chrome.runtime.getManifest().storage.managed_schema;
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x.open('get', chrome.runtime.getURL(schema_location));
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x.onload = function() {
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var storageKeys = Object.keys(x.response.properties);
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callback(storageKeys);
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};
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x.responseType = 'json';
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x.send();
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}
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// Save |values| to storage.sync and delete the values with that key from
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// storage.local.
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function migrateToSyncStorage(values) {
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storageSync.set(values, function() {
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if (chrome.runtime.lastError) {
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console.error('Failed to migrate settings due to an error: ' +
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chrome.runtime.lastError.message);
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return;
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}
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// Migration successful. Delete local settings.
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storageLocal.remove(Object.keys(values), function() {
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// In theory remove() could fail (e.g. if the browser's storage
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// backend is corrupt), but since storageSync.set succeeded, consider
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// the migration successful.
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console.log(
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'Successfully migrated preferences from local to sync storage.');
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});
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});
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}
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})();
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