--- /dev/null
+/*
+ Copyright (C) 2019 Kai Uwe Broulik <kde@privat.broulik.de>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 3 of
+ the License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+class SettingsUtils {
+ static storage() {
+ return (IS_FIREFOX ? chrome.storage.local : chrome.storage.sync);
+ }
+
+ static get() {
+ return new Promise((resolve, reject) => {
+ SettingsUtils.storage().get(null /* get all */, (items) => {
+ const error = chrome.runtime.lastError;
+ if (error) {
+ return reject(error);
+ }
+
+ // Passing a default Object get() only returns defaults for the top level of the object,
+ // so we need to merge the level underneath manually.
+ const addObjectInto = (obj, add) => {
+ if (typeof add !== "object" || Array.isArray(add)) {
+ return;
+ }
+
+ Object.keys(add).forEach((key) => {
+ if (obj.hasOwnProperty(key)) {
+ addObjectInto(obj[key], add[key]);
+ } else {
+ obj[key] = add[key];
+ }
+ });
+ };
+
+ addObjectInto(items, DEFAULT_EXTENSION_SETTINGS);
+ resolve(items);
+ });
+ });
+ }
+
+ static set(settings) {
+ return new Promise((resolve, reject) => {
+ try {
+ SettingsUtils.storage().set(settings, () => {
+ const error = chrome.runtime.lastError;
+ if (error) {
+ return reject(error);
+ }
+
+ resolve();
+ });
+ } catch (e) {
+ reject(e);
+ }
+ });
+ }
+
+ static onChanged() {
+ return chrome.storage.onChanged;
+ }
+}