Modifying options page

ext/bg/options.html

@@ -14,6 +14,7 @@
 
             <script src="lib/jquery-2.2.2.min.js"></script>
             <script src="lib/bootstrap-3.3.6-dist/js/bootstrap.min.js"></script>
+            <script src="options.js"></script>
         </div>
     </body>
 </html>

ext/bg/options.js

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2016  Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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/>.
+ */
+
+
+function sanitizeOptions(options) {
+    const defaults = {
+        scanLength: 20
+    };
+
+    for (const key in defaults) {
+        options[key] = options[key] || defaults[key];
+    }
+
+    return options;
+}
+
+function loadOptions(callback) {
+    chrome.storage.sync.get(null, (items) => callback(sanitizeOptions(items)));
+}
+
+function saveOptions(opts, callback) {
+    chrome.storage.sync.set(sanitizeOptions(opts), callback);
+}