Add isOwnUser method. Return the number of resources left when removing one.

chat.js

@@ -36,6 +36,10 @@ var xmppchat = (function (jarnxmpp, $, console) {
     ob.Messages = jarnxmpp.Messages || {};
     ob.Presence = jarnxmpp.Presence || {};
 
+    ob.isOwnUser = function (jid) {
+        return (Strophe.getBareJidFromJid(jid) === Strophe.getBareJidFromJid(xmppchat.connection.jid));
+    };
+
     ob.ChatPartners = (function () {
         /* A mapping of bare JIDs to resources, to keep track of 
         *  how many resources we have per chat partner.
@@ -54,19 +58,30 @@ var xmppchat = (function (jarnxmpp, $, console) {
         };
 
         methods.remove = function (bare_jid, resource) {
+            // Removes the resource for a user and returns the number of 
+            // resources left over.
             if (Object.prototype.hasOwnProperty.call(storage, bare_jid)) {
                 if (!(resource in helpers.oc(storage[bare_jid]))) {
                     var idx = storage[bare_jid].indexOf(resource);
                     if (idx !== undefined) {
                         storage[bare_jid].splice(idx, 1);
+                        if (storage[bare_jid].length === 0) {
+                            delete storage[bare_jid];
+                            return 0;
+                        }
+                        else {
+                            return storage[bare_jid].length;
                         }
                     }
                 }
+            }
+            return 0;
         };
 
         methods.getTotal = function () {
             return helpers.size(storage);
         };
+
         return methods;
     })();