local jid = require "util.jid";

local set = require "util.set";

local active_affiliations = set.new({ "member", "admin", "owner" });

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

	local room, occupant = event.room, event.occupant;

	local user_jid = occupant.bare_jid;

	local user_affiliation = room:get_affiliation(user_jid);

	if not active_affiliations:contains(user_affiliation) then

		return;

	end

	local aff_data = event.room:get_affiliation_data(user_jid);

	if not aff_data then

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

		module:log("debug", "Automatically reserving nickname '%s' for <%s>", reserved_nick, user_jid);

		room:set_affiliation_data(user_jid, "reserved_nickname", reserved_nick);

		room._reserved_nicks = nil; -- force refresh of nickname map

	end

end);