local jid = require "util.jid";

local st = require "util.stanza";

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

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

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

	for k, nick_pattern in pairs(nick_patterns) do

		if nick:match(nick_pattern) then

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

			module:send(reply);

			return true;

		end

	end

end);