-- Prosody IM

-- Copyright (C) 2008-2010 Matthew Wild

-- Copyright (C) 2008-2010 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 muclib = module:require "muc";

room_mt = muclib.room_mt; -- Yes, global.

local iterators = require "util.iterators";

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

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

local st = require "util.stanza";

local um_is_admin = require "core.usermanager".is_admin;

local rooms = module:shared "rooms";

module:depends("disco");

module:add_identity("conference", "text", module:get_option_string("name", "Prosody Chatrooms"));

module:add_feature("http://jabber.org/protocol/muc");

module:depends "muc_unique"

module:require "muc/lock";

local function is_admin(jid)

	return um_is_admin(jid, module.host);

end

do -- Monkey patch to make server admins room owners

	local _get_affiliation = room_mt.get_affiliation;

	function room_mt:get_affiliation(jid)

		if is_admin(jid) then return "owner"; end

		return _get_affiliation(self, jid);

	end

	local _set_affiliation = room_mt.set_affiliation;

	function room_mt:set_affiliation(actor, jid, ...)

		if is_admin(jid) then return nil, "modify", "not-acceptable"; end

		return _set_affiliation(self, actor, jid, ...);

	end

end

local persistent = module:require "muc/persistent";

local persistent_rooms_storage = module:open_store("persistent");

local persistent_rooms = module:open_store("persistent", "map");

local room_configs = module:open_store("config");

local function room_save(room, forced)

	local node = jid_split(room.jid);

	local is_persistent = persistent.get(room);

	persistent_rooms:set(nil, room.jid, is_persistent);

	if is_persistent then

		local history = room._data.history;

		room._data.history = nil;

		local data = {

			jid = room.jid;

			_data = room._data;

			_affiliations = room._affiliations;

		};

		room_configs:set(node, data);

		room._data.history = history;

	elseif forced then

		room_configs:set(node, nil);

		if not next(room._occupants) then -- Room empty

			rooms[room.jid] = nil;

		end

	end

end

-- Automatically destroy empty non-persistent rooms

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

	local room = event.room

	if not room:has_occupant() and not persistent.get(room) then -- empty, non-persistent room

		module:fire_event("muc-room-destroyed", { room = room });

	end

end);

function track_room(room)

	rooms[room.jid] = room;

	-- When room is created, over-ride 'save' method

	room.save = room_save;

end

local function restore_room(jid)

	local node = jid_split(jid);

	local data = room_configs:get(node);

	if data then

		local room = muclib.new_room(jid);

		room._data = data._data;

		room._affiliations = data._affiliations;

		track_room(room);

		return room;

	end

end

function forget_room(room)

	local room_jid = room.jid;

	local node = jid_split(room.jid);

	rooms[room_jid] = nil;

	room_configs:set(node, nil);

	if persistent.get(room) then

		persistent_rooms:set(nil, room_jid, nil);

	end

end

function get_room_from_jid(room_jid)

	local room = rooms[room_jid];

	if room == nil then

		-- Check if in persistent storage

		if persistent_rooms:get(nil, room_jid) then

			room = restore_room(room_jid);

			if room == nil then

				module:log("error", "Missing data for room '%s', removing from persistent room list", room_jid);

				persistent_rooms:set(nil, room_jid, nil);

			end

		end

	end

	return room

end

function each_room()

	for room_jid in pairs(persistent_rooms_storage:get(nil) or {}) do

		if rooms[room_jid] == nil then -- Don't restore rooms that already exist

			local room = restore_room(room_jid);

			if room == nil then

				module:log("error", "Missing data for room '%s', omitting from iteration", room_jid);

			end

		end

	end

	return iterators.values(rooms);

end

module:hook("host-disco-items", function(event)

	local reply = event.reply;

	module:log("debug", "host-disco-items called");

	for room in each_room() do

		if not room:get_hidden() then

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

		end

	end

end);

module:hook("muc-room-pre-create", function(event)

	track_room(event.room);

end, -1000);

module:hook("muc-room-destroyed",function(event)

	return forget_room(event.room);

end)

do

	local restrict_room_creation = module:get_option("restrict_room_creation");

	if restrict_room_creation == true then

		restrict_room_creation = "admin";

	end

	if restrict_room_creation then

		local host_suffix = module.host:gsub("^[^%.]+%.", "");

		module:hook("muc-room-pre-create", function(event)

			local origin, stanza = event.origin, event.stanza;

			local user_jid = stanza.attr.from;

			if not is_admin(user_jid) and not (

				restrict_room_creation == "local" and

				select(2, jid_split(user_jid)) == host_suffix

			) then

				origin.send(st.error_reply(stanza, "cancel", "not-allowed"));

				return true;

			end

		end);

	end

end

for event_name, method in pairs {

	-- Normal room interactions

	["iq-get/bare/http://jabber.org/protocol/disco#info:query"] = "handle_disco_info_get_query" ;

	["iq-get/bare/http://jabber.org/protocol/disco#items:query"] = "handle_disco_items_get_query" ;

	["iq-set/bare/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_set_command" ;

	["iq-get/bare/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_get_command" ;

	["iq-set/bare/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_set_to_room" ;

	["iq-get/bare/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_get_to_room" ;

	["message/bare"] = "handle_message_to_room" ;

	["presence/bare"] = "handle_presence_to_room" ;

	-- Host room

	["iq-get/host/http://jabber.org/protocol/disco#info:query"] = "handle_disco_info_get_query" ;

	["iq-get/host/http://jabber.org/protocol/disco#items:query"] = "handle_disco_items_get_query" ;

	["iq-set/host/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_set_command" ;

	["iq-get/host/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_get_command" ;

	["iq-set/host/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_set_to_room" ;

	["iq-get/host/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_get_to_room" ;

	["message/host"] = "handle_message_to_room" ;

	["presence/host"] = "handle_presence_to_room" ;

	-- Direct to occupant (normal rooms and host room)

	["presence/full"] = "handle_presence_to_occupant" ;

	["iq/full"] = "handle_iq_to_occupant" ;

	["message/full"] = "handle_message_to_occupant" ;

} do

	module:hook(event_name, function (event)

		local origin, stanza = event.origin, event.stanza;

		local room_jid = jid_bare(stanza.attr.to);

		local room = get_room_from_jid(room_jid);

		if room == nil then

			-- Watch presence to create rooms

			if stanza.attr.type == nil and stanza.name == "presence" then

				room = muclib.new_room(room_jid);

			else

				origin.send(st.error_reply(stanza, "cancel", "not-allowed"));

				return true;

			end

		end

		return room[method](room, origin, stanza);

	end, -2)

end

function shutdown_component()

	local x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user"})

		:tag("status", { code = "332"}):up();

	for room in each_room() do

		room:clear(x);

	end

end

module:hook_global("server-stopping", shutdown_component);

do -- Ad-hoc commands

	module:depends "adhoc";

	local t_concat = table.concat;

	local adhoc_new = module:require "adhoc".new;

	local adhoc_initial = require "util.adhoc".new_initial_data_form;

	local array = require "util.array";

	local dataforms_new = require "util.dataforms".new;

	local destroy_rooms_layout = dataforms_new {

		title = "Destroy rooms";

		instructions = "Select the rooms to destroy";

		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/muc#destroy" };

		{ name = "rooms", type = "list-multi", required = true, label = "Rooms to destroy:"};

	};

	local destroy_rooms_handler = adhoc_initial(destroy_rooms_layout, function()

	end, function(fields, errors)

		if errors then

			local errmsg = {};

			for name, err in pairs(errors) do

				errmsg[#errmsg + 1] = name .. ": " .. err;

			end

			return { status = "completed", error = { message = t_concat(errmsg, "\n") } };

		end

		for _, room in ipairs(fields.rooms) do

			get_room_from_jid(room):destroy();

		end

		return { status = "completed", info = "The following rooms were destroyed:\n"..t_concat(fields.rooms, "\n") };

	end);

	local destroy_rooms_desc = adhoc_new("Destroy Rooms", "http://prosody.im/protocol/muc#destroy", destroy_rooms_handler, "admin");

	module:provides("adhoc", destroy_rooms_desc);

end