File

plugins/muc/lock.lib.lua @ 11245:43b43e7156b8

MUC: Add support for presence probes (fixes #1535) The following patch allows Prosody to respond to `probe` presences and send out the probed occupant's current presence. This is based on line 17.3 in XEP-0045: A MUC service MAY handle presence probes sent to the room JID <room@service> or an occupant JID <room@service/nick> (e.g, these might be sent by an occupant's home server to determine if the room is still online or to synchronize presence information if the user or the user's server has gone offline temporarily or has started sharing presence again, as for instance when Stanza Interception and Filtering Technology (XEP-0273) is used).
author JC Brand <jc@opkode.com>
date Sun, 19 Apr 2020 21:49:45 +0200
parent 10450:c1edeb9fe337
child 12977:74b9e05af71e
line wrap: on
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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
-- Copyright (C) 2014 Daurnimator
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local st = require "util.stanza";

local lock_rooms = module:get_option_boolean("muc_room_locking", true);
local lock_room_timeout = module:get_option_number("muc_room_lock_timeout", 300);

local function lock(room)
	module:fire_event("muc-room-locked", {room = room;});
	room._data.locked = os.time() + lock_room_timeout;
end
local function unlock(room)
	module:fire_event("muc-room-unlocked", {room = room;});
	room._data.locked = nil;
end
local function is_locked(room)
	local ts = room._data.locked;
	if ts then
		if os.time() < ts then return true; end
		unlock(room);
	end
	return false;
end

if lock_rooms then
	module:hook("muc-room-pre-create", function(event)
		-- Older groupchat protocol doesn't lock
		if not event.stanza:get_child("x", "http://jabber.org/protocol/muc") then return end
		-- Lock room at creation
		local room = event.room;
		lock(room);
	end, 10);
end

-- Don't let users into room while it is locked
module:hook("muc-occupant-pre-join", function(event)
	if not event.is_new_room and is_locked(event.room) then -- Deny entry
		module:log("debug", "Room is locked, denying entry");
		event.origin.send(st.error_reply(event.stanza, "cancel", "item-not-found", nil, module.host));
		return true;
	end
end, -30);

-- When config is submitted; unlock the room
module:hook("muc-config-submitted", function(event)
	if is_locked(event.room) then
		unlock(event.room);
	end
end, -1);

return {
	lock = lock;
	unlock = unlock;
	is_locked = is_locked;
};