Add desktop notifications, overridable in the same way as other components (although it's not a react component). Also extend the flux dispatcher a little to be less dumb about dispatching while something else is already dispatching.

src/controllers/organisms/Notifier.js

@@ -0,0 +1,46 @@
+/*
+Copyright 2015 OpenMarket Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+'use strict';
+
+var MatrixClientPeg = require("../../MatrixClientPeg");
+
+module.exports = {
+    start: function() {
+        this.boundOnRoomTimeline = this.onRoomTimeline.bind(this);
+        MatrixClientPeg.get().on('Room.timeline', this.boundOnRoomTimeline);
+    },
+
+    stop: function() {
+        if (MatrixClientPeg.get()) {
+            MatrixClientPeg.get().removeListener('Room.timeline', this.boundOnRoomTimeline);
+        }
+    },
+
+    onRoomTimeline: function(ev, room, toStartOfTimeline) {
+        if (toStartOfTimeline) return;
+        if (ev.sender.userId == MatrixClientPeg.get().credentials.userId) return;
+
+        var enabled = global.localStorage.getItem('notifications_enabled');
+        if (enabled === 'false') return;
+
+        var actions = MatrixClientPeg.get().getPushActionsForEvent(ev);
+        if (actions && actions.notify) {
+            this.displayNotification(ev, room);
+        }
+    }
+};
+