First steps:

- changing background is possible
	- backgrounds are fetched from desktopper
	- backgrounds are saved to ~/tempX
	- bug: changing backgrounds stops working after 2 times (possible not my fault)

randomwallpaper@iflow.productions/extension.js

@@ -1,53 +1,92 @@
+const Lang = imports.lang;
 
-const St = imports.gi.St;
+// UI Imports
 const Main = imports.ui.main;
-const Tweener = imports.ui.tweener;
+const St = imports.gi.St;
+const PanelMenu = imports.ui.panelMenu;
+const PopupMenu = imports.ui.popupMenu;
 
-let text, button;
+// network requests
+const Soup = imports.gi.Soup;
+const Json = imports.gi.Json;
 
-function _hideHello() {
-    Main.uiGroup.remove_actor(text);
-    text = null;
-}
+// Filesystem
+const Gio = imports.gi.Gio;
 
-function _showHello() {
-    if (!text) {
-        text = new St.Label({ style_class: 'helloworld-label', text: "Hello, world!" });
-        Main.uiGroup.add_actor(text);
-    }
-
-    text.opacity = 255;
-
-    let monitor = Main.layoutManager.primaryMonitor;
-
-    text.set_position(Math.floor(monitor.width / 2 - text.width / 2),
-                      Math.floor(monitor.height / 2 - text.height / 2));
-
-    Tweener.addTween(text,
-                     { opacity: 0,
-                       time: 2,
-                       transition: 'easeOutQuad',
-                       onComplete: _hideHello });
-}
+let button;
 
 function init() {
-    button = new St.Bin({ style_class: 'panel-button',
-                          reactive: true,
-                          can_focus: true,
-                          x_fill: true,
-                          y_fill: false,
-                          track_hover: true });
-    let icon = new St.Icon({ icon_name: 'system-run-symbolic',
-                             style_class: 'system-status-icon' });
+  // UI
+  let icon = new St.Icon({ icon_name: 'system-run-symbolic',
+                           style_class: 'system-status-icon' });
+  
+  button = new PanelMenu.Button(0, "Random wallpaper");
+  button.actor.add_child(icon);
+  let menu_item = new PopupMenu.PopupMenuItem('Change Background')
+  button.menu.addMenuItem(menu_item, 0);
+  button.menu.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
+  button.menu.addMenuItem(new PopupMenu.PopupMenuItem('trolololol'));
 
-    button.set_child(icon);
-    button.connect('button-press-event', _showHello);
+  // add eventlistener
+  menu_item.actor.connect('button-press-event', _requestRandomImage);
+}
+
+// fetch a random image url from desktopper.cc
+function _requestRandomImage(){
+  let session = new Soup.SessionAsync();
+  let message = Soup.Message.new('GET', 'https://api.desktoppr.co/1/wallpapers/random')
+  
+  let parser = new Json.Parser();
+
+  session.queue_message(message, function(session, message) {
+    parser.load_from_data(message.response_body.data, -1);
+    
+    let data = parser.get_root().get_object()
+    let response = data.get_object_member('response');
+    let imageUrl = response.get_object_member('image').get_string_member('url');
+
+    _writeToFile(imageUrl);
+  });
+}
+
+let counter = 0;
+// copy file from uri to local direcotry
+function _writeToFile(uri){
+  let output_file = Gio.file_new_for_path("temp"+counter);
+  let input_file = Gio.file_new_for_uri(uri);
+  let fstream = input_file.copy(output_file, Gio.FileCopyFlags.OVERWRITE, null, function(){
+  }, function(){
+  });  
+
+  _setBackground(output_file.get_path());
+}
+
+
+function _setBackground(path){
+  let background_setting = new Gio.Settings({schema: "org.gnome.desktop.background"});
+  
+  global.log("Current Background-Image: "+ background_setting.get_string("picture-uri"));
+  // Set:
+  if (background_setting.is_writable("picture-uri")){
+      // Set a new Background-Image (should show up immediately):
+      if (background_setting.set_string("picture-uri", "file://"+path) ){
+          background_setting.apply();
+          Gio.Settings.sync(); // Necessary: http://stackoverflow.com/questions/9985140
+          counter++;
+      } else {
+
+      }
+  } else {
+
+  }
 }
 
 function enable() {
-    Main.panel._rightBox.insert_child_at_index(button, 2);
+  global.log("ENABLE");
+  Main.panel.addToStatusArea("random-wallpaper-menu", button);
 }
 
 function disable() {
-    Main.panel._rightBox.remove_child(button);
+  global.log("DISABLE");
+  button.destroy();
 }