Move platform-specific functionality into Platform

Platform classes are provided by the application via
PlatformPeg.set().

package.json

@@ -48,7 +48,6 @@
     "draft-js-export-html": "^0.4.0",
     "draft-js-export-markdown": "^0.2.0",
     "emojione": "2.2.3",
-    "favico.js": "^0.3.10",
     "filesize": "^3.1.2",
     "flux": "^2.0.3",
     "fuse.js": "^2.2.0",

src/BasePlatform.js

@@ -0,0 +1,41 @@
+// @flow
+
+/*
+Copyright 2016 Aviral Dasgupta and 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.
+*/
+
+/**
+ * Base class for classes that provide platform-specific functionality
+ * eg. Setting an application badge or displaying notifications
+ *
+ * Instances of this class are provided by the application.
+ */
+export default class BasePlatform {
+    constructor() {
+        this.notificationCount = 0;
+        this.errorDidOccur = false;
+    }
+
+    setNotificationCount(count: number) {
+        this.notificationCount = count;
+    }
+
+    setErrorStatus(errorDidOccur: boolean) {
+        this.errorDidOccur = errorDidOccur;
+    }
+
+    displayNotification(title: string, msg: string, avatarUrl: string) {
+    }
+}

src/PlatformPeg.js

@@ -0,0 +1,50 @@
+/*
+Copyright 2016 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.
+*/
+
+/*
+ * Holds the current Platform object used by the code to do anything
+ * specific to the platform we're running on (eg. web, electron)
+ * Platforms are provided by the app layer.
+ * This allows the app layer to set a Platform without necessarily
+ * having to have a MatrixChat object
+ */
+class PlatformPeg {
+    constructor() {
+        this.platform = null;
+    }
+
+    /**
+     * Returns the current Platform object fir the application.
+     * This should be an instance of a class extending BasePlatform.
+     */
+    get() {
+        return this.platform;
+    }
+
+    /**
+     * Sets the current platform handler object to use for the
+     * application.
+     * This should be an instance of a class extending BasePlatform.
+     */
+    set(plaf) {
+        this.platform = plaf;
+    }
+}
+
+if (!global.mxPlatformPeg) {
+    global.mxPlatformPeg = new PlatformPeg();
+}
+module.exports = global.mxPlatformPeg;

src/components/structures/MatrixChat.js

@@ -18,9 +18,9 @@ import q from 'q';
 
 var React = require('react');
 var Matrix = require("matrix-js-sdk");
-var Favico = require('favico.js');
 
 var MatrixClientPeg = require("../../MatrixClientPeg");
+var PlatformPeg = require("../../PlatformPeg");
 var SdkConfig = require("../../SdkConfig");
 var Notifier = require("../../Notifier");
 var ContextualMenu = require("./ContextualMenu");
@@ -172,7 +172,6 @@ module.exports = React.createClass({
 
     componentWillMount: function() {
         SdkConfig.put(this.props.config);
-        this.favicon = new Favico({animation: 'none'});
 
         // Stashed guest credentials if the user logs out
         // whilst logged in as a guest user (so they can change
@@ -639,7 +638,7 @@ module.exports = React.createClass({
 
         var self = this;
         cli.on('sync', function(state, prevState) {
-            self.updateFavicon(state, prevState);
+            self.updateStatusIndicator(state, prevState);
             if (state === "SYNCING" && prevState === "SYNCING") {
                 return;
             }
@@ -970,7 +969,7 @@ module.exports = React.createClass({
         });
     },
 
-    updateFavicon: function(state, prevState) {
+    updateStatusIndicator: function(state, prevState) {
         var notifCount = 0;
 
         var rooms = MatrixClientPeg.get().getRooms();
@@ -984,24 +983,12 @@ module.exports = React.createClass({
                 notifCount++;
             }
         }
-        try {
-            // This needs to be in in a try block as it will throw
-            // if there are more than 100 badge count changes in
-            // its internal queue
-            var bgColor = "#d00",
-                notif = notifCount;
 
-            if(state === "ERROR") {
-                notif = notif || "×";
-                bgColor = "#f00";
-            }
-
-            this.favicon.badge(notif, {
-                bgColor: bgColor
-            });
-        } catch (e) {
-            console.warn("Failed to set badge count: "+e.message);
+        if (PlatformPeg.get()) {
+            PlatformPeg.get().setErrorStatus(state === 'ERROR');
+            PlatformPeg.get().setNotificationCount(notifCount);
         }
+
         document.title = `Riot ${state === "ERROR" ? " [offline]" : ""}${notifCount > 0 ? ` [${notifCount}]` : ""}`;
     },