added muc functionality

sleekxmpp/plugins/xep_0045.py

@@ -146,7 +146,14 @@ class xep_0045(base.base_plugin):
 		""" Handle a message event in a muc.
 		"""
 		self.xmpp.event('groupchat_message', msg)
-	
+		       
+		def jidInRoom(self, room, jid):
+			for nick in self.rooms[room]:
+				entry = self.rooms[room][nick]
+				if entry is not None and entry['jid'].full == jid:
+					return True
+			return False
+
 	def getRoomForm(self, room, ifrom=None):
 		iq = self.xmpp.makeIqGet()
 		iq['to'] = room