1 local jid = require "util.jid";

     2 local st = require "util.stanza";

     3 

     4 local nick_patterns = module:get_option_array("muc_reserve_nick_patterns", {});

     5 

     6 module:hook("muc-occupant-pre-join", function (event)

     7 	local nick = jid.resource(event.occupant.nick);

     8 	for k, nick_pattern in pairs(nick_patterns) do

     9 		if nick:match(nick_pattern) then

    10 			local reply = st.error_reply(event.stanza, "modify", "conflict", "Unacceptable nickname, please try another");

    11 			module:send(reply);

    12 			return true;

    13 		end

    14 	end

    15 end);