view mod_muc_restrict_rooms/mod_muc_restrict_rooms.lua @ 1613:ca04f75958f7

mod_muc_restrict_rooms: Some fixes based on Matthew's comments + a few more
author Nicolás Kovac <nkneumann(at)>
date Fri, 20 Feb 2015 21:28:39 +0000
parents 247e6e43843e
children 79adec50b24d
line wrap: on
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local st = require "util.stanza";
local jid = require "util.jid";
local nodeprep = require "util.encodings".stringprep.nodeprep;

local rooms = module:shared "muc/rooms";
if not rooms then
        module:log("error", "This module only works on MUC components!");

local restrict_patterns = module:get_option("muc_restrict_matching", {});
local restrict_excepts = module:get_option_set("muc_restrict_exceptions", {});
local restrict_allow_admins = module:get_option_boolean("muc_restrict_allow_admins", false);

local function is_restricted(room, who)
	-- If admins can join prohibited rooms, we allow them to
	if restrict_allow_admins and usermanager.is_admin(who, then
		module:log("debug", "Admins are allowed to enter restricted rooms (%s on %s)", who, room)
		return nil;

	-- Don't evaluate exceptions
	if restrict_excepts:contains(room) then
		module:log("debug", "Room %s is amongst restriction exceptions", room())
		return nil;

	-- Evaluate regexps of restricted patterns
        for pattern,reason in pairs(restrict_patterns) do
                if room:match(pattern) then
			module:log("debug", "Room %s is restricted by pattern %s, user %s is not allowed to join (%s)", room, pattern, who, reason)
                        return reason;

	return nil

module:hook("presence/full", function(event)
        local stanza = event.stanza;

        if == "presence" and stanza.attr.type == "unavailable" then   -- Leaving events get discarded

	-- Get the room
	local room = jid.split(stanza.attr.from);
        if not room then return; end

	-- Get who has tried to join it
	local who = jid.bare(

	-- Checking whether room is restricted
	local check_restricted = is_restricted(room, who)
        if check_restricted ~= nil then
                event.allowed = false;
                event.stanza.attr.type = 'error';
	        return event.origin.send(st.error_reply(event.stanza, "cancel", "forbidden", "You're not allowed to enter this room: " .. check_restricted));
end, 10);