Check status CHANGES on client side

[mburtscher]

I use "long" requests and my own server-side implementations for the login/poll/post handlers.

At the end of every "poll" request (after 30 seconds) I wanted to send the whole contact list to the client with current statuses of all users. So I added a "status update" message for every user in the contact list. But because AjaxIM doesn't check status CHANGES on client side, i get an output like this in the chat window:
05:28 PM - user became available.
05:28 PM - user became available.
05:29 PM - user became available.
05:29 PM - user became available.
05:30 PM - user became available.
05:30 PM - user became available.

I think status CHANGE checks should be implemented on client side. So if user x is already online and a "status update" message was sent as response to the "poll" request, the new status should only be shown if it really changed.