Implemented system messages.

js/main.js

@@ -59,7 +59,9 @@
                 socket.onclose = function () {alert("closed");};
             }, "json");
 
-            this.updateMemberList();
+            /* Don't update members until /set_name finished 
+               with current (broken) protocol. */
+            // this.updateMemberList();
 
             $("#say").submit(function (e) {
                 $.post(room_id + "/say", {saying : $("#saying").val()}); 

service.py

@@ -7,13 +7,16 @@
 import hashlib
 
 def delete_member(member, force=False):
-    deleting_id = member.client_id
+    name = member.get_name()
     room = member.parent()
     member.delete()
 
     room_service = RoomService(room)
     if force: 
-        room_service.say(None, "Deleted %s." % deleting_id)
+        room_service.say(None, "%s may have gone." % name)
+    else:
+        room_service.say(None, "%s exited." % name)
+
     room_service.notify_all({"event" : "member_changed"})
 
 class RoomService(object):
@@ -51,7 +54,9 @@ def needs_transaction():
                 new_member.put()
 
                 member = new_member
-                self.notify_all({"event" : "member_changed"})
+                # Don't notify until set_name finished
+                # with current (broken) protocol.
+                # self.notify_all({"event" : "member_changed"})
 
             return member, token
 
@@ -100,6 +105,14 @@ def set_name(self, user, new_name):
         member.nickname = new_name
         member.put()
 
+        if old_name:
+            if old_name != new_name:
+                self.say(None, "Call %s %s from now." % (old_name, new_name))
+        else:
+            # XXX set_name means entering this room 
+            #     in current (broken) protocol
+            self.say(None, "%s entered." % new_name)
+
         self.notify_all({"event" : "member_changed"})
 
     def ping(self, client_id):