def irc_NICK(self, prefix, params):
if params and irc_lower(params[0]) in self.services: # Can't use a service nick
self.sendMessage(irc.ERR_NICKNAMEINUSE, params[0], ":Nickname is already in use", prefix=self.service_prefix("NickServ"))
return
oldnick = irc_lower(self.nickname)
IRCUser.irc_NICK(self, prefix, params)
newnick = irc_lower(self.nickname)
if oldnick != newnick:
self.checkNick()
