local bare_jid = require"util.jid".bare;

local mod_muc = module:depends("muc");

local function filter_avatar_advertisement(tag)

	if tag.attr.xmlns == "vcard-temp:x:update" then

		return nil;

	end

	return tag;

end

module:hook("presence/full", function(event)

	local stanza = event.stanza;

	local room = mod_muc.get_room_from_jid(bare_jid(stanza.attr.to));

	if not room:get_affiliation(stanza.attr.from) then

		stanza:maptags(filter_avatar_advertisement);

	end

end, 1);