I'm using chat plugin and in particular, friends chat plugin in order to place private chats between members.
Currently, this plugin allows to add an "available" link on the profile of the members that are friends. I would like to extend this to all connected members (and if possible, all members that have a valid membership). I have already started to analyse your file wordpress-chat/lib/wpmudev_chat_widget.php and it seems this should not be of big difficulty to make some modifications for this.
Could you have a look and let me know if there is a chance to propose a modification in a short period of time, even if I need to modify core file in a first step.