Better status handling. We shouldn't access ClientStorage from UI side

chatui.js

@@ -11,33 +11,36 @@ xmppchat.UI = (function (xmppUI, $, console) {
     ob.updateOnPresence = function (jid, status, presence) {
         var user_id = Strophe.getNodeFromJid(jid),
             bare_jid = Strophe.getBareJidFromJid(jid),
-            resource, existing_user_element, online_count;
+            resource, 
+            online_count,
+            $chat = $("#"+helpers.hash(bare_jid)),
+            $chat_content,
+            existing_user_element = $('#online-users-' + user_id);
 
         if (xmppchat.isOwnUser(jid)) { return; }
 
-        existing_user_element = $('#online-users-' + user_id);
-        if ((status === 'offline') || (status === 'unavailable')) {
-            // Remove the resource.
-            bare_jid = Strophe.getBareJidFromJid(jid);
-            resource = Strophe.getResourceFromJid(jid);
-            if (xmppchat.ChatPartners.remove(bare_jid, resource) === 0) {
-                // Only set the status offline if there aren't any other resources for that user
-                if (existing_user_element.length > 0) {
-                    existing_user_element.attr('class', status);
+        if ($chat.length > 0) {
+            $chat_content = $chat.find(".chat-content");
+            $chat_content.find('div.chat-event').remove();
+            if (status === 'offline') {
+                xmppchat.Presence.getUserInfo(user_id, function (data) {
+                    $chat_content.append($('<div></div>').addClass('chat-event').text(data.fullname + ' has gone offline.'));
+                    $chat_content.scrollTop($content[0].scrollHeight);
+                });
             }
-                return;
         }
-        } else {
+
         if (existing_user_element.length > 0) {
             existing_user_element.attr('class', status);
-            } else {
+        } else if ((status !== 'offline') && (status !== 'unavailable')) {
             xmppchat.Presence.getUserInfo(user_id, function (data) {
                 if ($('#online-users-' + user_id).length > 0) { return; }
                 var li = $('<li></li>').attr('id', 'online-users-'+user_id).attr('data-recipient', bare_jid);
                 li.append($('<a></a>').addClass('user-details-toggle').text(data.fullname));
                 $('#online-users').append(li);
             });
-            }
+        } else { // status is offline and the user isn't shown as online
+            return;
         }
         $('#online-count').text(xmppchat.Presence.onlineCount());
     };