GitLab

It does not currently seem possible to "send a message" just before a user disconnects/closes gajim.

This could be added by adding a show event inside connection.py change_status function like so:

common/connection.py

            if show == 'offline':
                gajim.nec.push_incoming_event(OurShowEvent(None, conn=self,
                    show='offline'))
                self.connected = 0
                if self.connection:
                    p = nbxmpp.Presence(typ = 'unavailable')
                    p = self.add_sha(p, False)
                    if msg:
                        p.setStatus(msg)
    
                    self.connection.RegisterDisconnectHandler(self._on_disconnected)
                    self.connection.send(p, now=True)
                    self.connection.start_disconnect()
                else:
                    self._on_disconnected()
                return