-- Prosody IM

-- Copyright (C) 2008-2009 Matthew Wild

-- Copyright (C) 2008-2009 Waqas Hussain

-- 

-- This project is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

if module:get_host_type() ~= "component" then

	error("MUC should be loaded as a component, please see http://prosody.im/doc/components", 0);

end

local muc_host = module:get_host();

local muc_name = "Chatrooms";

local history_length = 20;

local muc_new_room = module:require "muc".new_room;

local register_component = require "core.componentmanager".register_component;

local deregister_component = require "core.componentmanager".deregister_component;

local jid_split = require "util.jid".split;

local st = require "util.stanza";

local uuid_gen = require "util.uuid".generate;

local rooms = {};

local component;

local host_room = muc_new_room(muc_host);

host_room.route_stanza = function(room, stanza) core_post_stanza(component, stanza); end;

local function get_disco_info(stanza)

	return st.iq({type='result', id=stanza.attr.id, from=muc_host, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")

		:tag("identity", {category='conference', type='text', name=muc_name}):up()

		:tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply

end

local function get_disco_items(stanza)

	local reply = st.iq({type='result', id=stanza.attr.id, from=muc_host, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");

	for jid, room in pairs(rooms) do

		reply:tag("item", {jid=jid, name=jid}):up();

	end

	return reply; -- TODO cache disco reply

end

local function handle_to_domain(origin, stanza)

	local type = stanza.attr.type;

	if type == "error" or type == "result" then return; end

	if stanza.name == "iq" and type == "get" then

		local xmlns = stanza.tags[1].attr.xmlns;

		if xmlns == "http://jabber.org/protocol/disco#info" then

			origin.send(get_disco_info(stanza));

		elseif xmlns == "http://jabber.org/protocol/disco#items" then

			origin.send(get_disco_items(stanza));

		elseif xmlns == "http://jabber.org/protocol/muc#unique" then

			origin.send(st.reply(stanza):tag("unique", {xmlns = xmlns}):text(uuid_gen())); -- FIXME Random UUIDs can theoretically have collisions

		else

			origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc

		end

	else

		host_room:handle_stanza(origin, stanza);

		--origin.send(st.error_reply(stanza, "cancel", "service-unavailable", "The muc server doesn't deal with messages and presence directed at it"));

	end

end

component = register_component(muc_host, function(origin, stanza)

	local to_node, to_host, to_resource = jid_split(stanza.attr.to);

	if to_node then

		local bare = to_node.."@"..to_host;

		if to_host == muc_host or bare == muc_host then

			local room = rooms[bare];

			if not room then

				room = muc_new_room(bare);

				room.route_stanza = function(room, stanza) core_post_stanza(component, stanza); end;

				rooms[bare] = room;

			end

			room:handle_stanza(origin, stanza);

		else --[[not for us?]] end

		return;

	end

	-- to the main muc domain

	handle_to_domain(origin, stanza);

end);

prosody.hosts[module:get_host()].muc = { rooms = rooms };

module.unload = function()

	deregister_component(muc_host);

end

module.save = function()

	return {rooms = rooms};

end

module.restore = function(data)

	prosody.hosts[module:get_host()].muc = { rooms = rooms };

end