File

+
−local jid = require "util.jid";
+
−local st = require "util.stanza";
+
−
+
−local nick_pattern = module:get_option_string("muc_restrict_nick_pattern", "^%w+$");
+
−
+
−module:hook("muc-occupant-pre-join", function (event)
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−	local nick = jid.resource(event.occupant.nick);
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−	if not nick:match(nick_pattern) then
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−		local reply = st.error_reply(event.stanza, "modify", "policy-violation", "Unacceptable nickname, please try another");
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−		module:send(reply);
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−		return true;
+
−	end
+
−end);