Also show HTML5 notifications for chat state changes.

updates #443

src/converse-core.js

@@ -882,6 +882,7 @@
 
 
         this.RosterContact = Backbone.Model.extend({
+
             initialize: function (attributes, options) {
                 var jid = attributes.jid;
                 var bare_jid = Strophe.getBareJidFromJid(jid);
@@ -1019,6 +1020,7 @@
 
         this.RosterContacts = Backbone.Collection.extend({
             model: converse.RosterContact,
+
             comparator: function (contact1, contact2) {
                 var name1, name2;
                 var status1 = contact1.get('chat_status') || 'offline';
@@ -2124,6 +2126,7 @@
                         this.$el.find('div.chat-event').remove();
                     }
                 }
+                // FIXME: multiple parameters not accepted?
                 converse.emit('contactStatusChanged', item.attributes, item.get('chat_status'));
             },
 

src/converse-notification.js

@@ -39,7 +39,7 @@
             notifyOfNewMessage: function ($message) {
                 var result = this._super.notifyOfNewMessage.apply(this, arguments);
                 if (result && (this.windowState === 'blur') && (Notification.permission === "granted")) {
-                    this.showNotification($message);
+                    this.showMessageNotification($message);
                 }
                 return result;
             }
@@ -51,7 +51,35 @@
              */
             var converse = this.converse;
 
-            converse.showNotification = function ($message) {
+            converse.showChatStateNotification = function (event, contact) {
+                /* Show an HTML5 notification indicating that a contact changed
+                 * their chat state.
+                 */
+                var chat_state = contact.chat_status,
+                    message = null;
+                if (chat_state === 'offline') {
+                    message = __('has gone offline');
+                } else if (chat_state === 'away') {
+                    message = __('has gone away');
+                } else if ((chat_state === 'dnd')) {
+                    message = __('is busy');
+                } else if (chat_state === 'online') {
+                    message = __('has come online');
+                }
+                if (message === null) {
+                    return;
+                }
+                var n = new Notification(contact.fullname, {
+                        body: message,
+                        lang: converse.i18n.locale_data.converse[""].lang,
+                        icon: 'logo/conversejs.png'
+                    });
+                setTimeout(n.close.bind(n), 5000);
+            };
+
+            converse.on('contactStatusChanged',  converse.showChatStateNotification);
+
+            converse.showMessageNotification = function ($message) {
                 /* Show an HTML5 notification of a received message.
                  */
                 var contact_jid = Strophe.getBareJidFromJid($message.attr('from'));