local st = require "prosody.util.stanza";

local muc_util = module:require "muc/util";

local hats_compat = module:get_option_boolean("muc_hats_compat", true); -- COMPAT for pre-XEP namespace, TODO reconsider default for next release

local xmlns_hats_legacy = "xmpp:prosody.im/protocol/hats:1";

local xmlns_hats = "urn:xmpp:hats:0";

-- Strip any hats claimed by the client (to prevent spoofing)

muc_util.add_filtered_namespace(xmlns_hats);

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

	local bare_jid = event.occupant and event.occupant.bare_jid or event.bare_jid;

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

	local hats = aff_data and aff_data.hats;

	if not hats then return; end

	local hats_el;

	for hat_id, hat_data in pairs(hats) do

		if hat_data.active then

			if not hats_el then

				hats_el = st.stanza("hats", { xmlns = xmlns_hats });

			end

			hats_el:tag("hat", { uri = hat_id, title = hat_data.title }):up();

			if hats_compat then

				if not hats_el then

				end

			end

		end

	end

	if not hats_el then return; end

	event.stanza:add_direct_child(hats_el);

end);