Fix the confusion when running multiple instances on the

same box by passing the nick name in the message.

sugar/chat/Chat.py

@@ -184,6 +184,11 @@ class Chat(gtk.VBox):
 		if not buddy:
 			return
 
+		# FIXME a better way to compare buddies?			
+		owner = PresenceService.get_instance().get_owner()
+		if buddy.get_nick_name() == owner.get_nick_name():
+			return
+
 		chunk = self._get_first_richtext_chunk(msg)
 		if chunk:
 			self._insert_rich_message(buddy, chunk)
@@ -205,6 +210,13 @@ class Chat(gtk.VBox):
 		"""Send a chat message and insert it into the local buffer."""
 		if len(text) <= 0:
 			return
-		self._stream_writer.write(text)
+		self._stream_writer.write(self.serialize_message(text))
 		owner = PresenceService.get_instance().get_owner()
 		self._insert_rich_message(owner, text)
+
+	def serialize_message(self, message):
+		owner = PresenceService.get_instance().get_owner()
+		return owner.get_nick_name() + '||' + message
+		
+	def deserialize_message(self, message):
+		return message.split('||', 1)

sugar/chat/GroupChat.py

@@ -39,8 +39,9 @@ class GroupChat(Chat):
 
 	def _group_recv_message(self, address, msg):
 		pservice = PresenceService.get_instance()
-		buddy = pservice.get_buddy_by_address(address)
+		[nick, msg] = self.deserialize_message(msg)
+		buddy = pservice.get_buddy_by_nick_name(nick)
 		if buddy:
 			self.recv_message(buddy, msg)
 		else:
-			logging.error('Cannot map %s to a buddy.' % (address))
+			logging.error('The buddy %s is not present.' % (nick))