Tidy up muc state on join/leave

clientapp/models/muc.js

@@ -108,6 +108,8 @@ module.exports = HumanModel.define({
         if (!this.nick) {
             this.nick = me.jid.local;
         }
+        this.messages.reset();
+        this.resources.reset();
         client.joinRoom(this.jid, this.nick, {
             history: {
                 maxstanzas: 50
@@ -116,6 +118,7 @@ module.exports = HumanModel.define({
         });
     },
     leave: function () {
+        this.resources.reset();
         client.leaveRoom(this.jid, this.nick);
     }
 });

clientapp/pages/groupchat.js

@@ -20,6 +20,7 @@ module.exports = BasePage.extend({
         this.listenTo(this, 'pageunloaded', this.handlePageUnloaded);
 
         this.listenTo(this.model.messages, 'change', this.refreshModel);
+        this.listenTo(this.model.messages, 'reset', this.resetMessages);
 
         this.render();
     },
@@ -225,5 +226,8 @@ module.exports = BasePage.extend({
     refreshModel: function (model) {
         var existing = this.$('#chat' + model.cid);
         existing.replaceWith(model.partialTemplateHtml);
+    },
+    resetMessages: function () {
+        this.$messageList.empty();
     }
 });

public/x-manifest.cache

@@ -1,5 +1,5 @@
 CACHE MANIFEST
-# 0.0.1 1388621918000
+# 0.0.1 1388626859519
 
 CACHE:
 /app.js