aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/muc/mod_muc.lua
blob: b2949e703ef119de383111ad376beca3992957c8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
-- 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 https://prosody.im/doc/components", 0);
end

local muclib = module:require "muc";
room_mt = muclib.room_mt; -- Yes, global.

local affiliation_notify = module:require "muc/affiliation_notify"; -- luacheck: ignore 211

local name = module:require "muc/name";
room_mt.get_name = name.get;
room_mt.set_name = name.set;

local description = module:require "muc/description";
room_mt.get_description = description.get;
room_mt.set_description = description.set;

local hidden = module:require "muc/hidden";
room_mt.get_hidden = hidden.get;
room_mt.set_hidden = hidden.set;
function room_mt:get_public()
	return not self:get_hidden();
end
function room_mt:set_public(public)
	return self:set_hidden(not public);
end

local password = module:require "muc/password";
room_mt.get_password = password.get;
room_mt.set_password = password.set;

local members_only = module:require "muc/members_only";
room_mt.get_members_only = members_only.get;
room_mt.set_members_only = members_only.set;

local moderated = module:require "muc/moderated";
room_mt.get_moderated = moderated.get;
room_mt.set_moderated = moderated.set;

local persistent = module:require "muc/persistent";
room_mt.get_persistent = persistent.get;
room_mt.set_persistent = persistent.set;

local subject = module:require "muc/subject";
room_mt.get_changesubject = subject.get_changesubject;
room_mt.set_changesubject = subject.set_changesubject;
room_mt.get_subject = subject.get;
room_mt.set_subject = subject.set;
room_mt.send_subject = subject.send;

local history = module:require "muc/history";
room_mt.send_history = history.send;
room_mt.get_historylength = history.get_length;
room_mt.set_historylength = history.set_length;

local jid_split = require "util.jid".split;
local jid_bare = require "util.jid".bare;
local st = require "util.stanza";
local cache = require "util.cache";
local um_is_admin = require "core.usermanager".is_admin;

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, affiliation, reason)
		if affiliation ~= "owner" and is_admin(jid) then return nil, "modify", "not-acceptable"; end
		return _set_affiliation(self, actor, jid, affiliation, reason);
	end
end

local persistent_rooms_storage = module:open_store("persistent");
local persistent_rooms = module:open_store("persistent", "map");
local room_configs = module:open_store("config");
local room_state = module:open_store("state");

local room_items_cache = {};

local function room_save(room, forced, savestate)
	local node = jid_split(room.jid);
	local is_persistent = persistent.get(room);
	room_items_cache[room.jid] = room:get_public() and room:get_name() or nil;
	if is_persistent or savestate then
		persistent_rooms:set(nil, room.jid, true);
		local data, state = room:freeze(savestate);
		room_state:set(node, state);
		return room_configs:set(node, data);
	elseif forced then
		persistent_rooms:set(nil, room.jid, nil);
		room_state:set(node, nil);
		return room_configs:set(node, nil);
	end
end

local rooms = cache.new(module:get_option_number("muc_room_cache_size", 100), function (jid, room)
	module:log("debug", "%s evicted", jid);
	room_save(room, nil, true); -- Force to disk
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, -1);

function track_room(room)
	rooms:set(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);
	local state = room_state:get(node);
	if data then
		module:log("debug", "Restoring room %s from storage", jid);
		local room = muclib.restore_room(data, state);
		track_room(room);
		return room;
	end
end

function forget_room(room)
	module:log("debug", "Forgetting %s", room.jid);
	rooms.save = nil;
	rooms:set(room.jid, nil);
end

function delete_room(room)
	module:log("debug", "Deleting %s", room.jid);
	room_configs:set(jid_split(room.jid), nil);
	persistent_rooms:set(nil, room.jid, nil);
	room_items_cache[room.jid] = nil;
end

function module.unload()
	for room in rooms:values() do
		room:save(nil, true);
		forget_room(room);
	end
end

function get_room_from_jid(room_jid)
	local room = rooms:get(room_jid);
	if room then
		rooms:set(room_jid, room); -- bump to top;
		return room;
	end
	return restore_room(room_jid);
end

function create_room(room_jid)
	local exists = get_room_from_jid(room_jid);
	if exists then
		return nil, "room-exists";
	end
	local room = muclib.new_room(room_jid);
	module:fire_event("muc-room-created", {
		room = room;
	});
	return room;
end

function each_room(local_only)
	if local_only then
		return rooms:values();
	end
	return coroutine.wrap(function ()
		local seen = {}; -- Don't iterate over persistent rooms twice
		for room in rooms:values() do
			coroutine.yield(room);
			seen[room.jid] = true;
		end
		for room_jid in pairs(persistent_rooms_storage:get(nil) or {}) do
			if not seen[room_jid] then
				local room = restore_room(room_jid);
				if room == nil then
					module:log("error", "Missing data for room '%s', omitting from iteration", room_jid);
				else
					coroutine.yield(room);
				end
			end
		end
	end);
end

module:hook("host-disco-items", function(event)
	local reply = event.reply;
	module:log("debug", "host-disco-items called");
	if next(room_items_cache) ~= nil then
		for jid, room_name in pairs(room_items_cache) do
			reply:tag("item", { jid = jid, name = room_name }):up();
		end
	else
		for room in each_room() do
			if not room:get_hidden() then
				local jid, room_name = room.jid, room:get_name();
				room_items_cache[jid] = room_name;
				reply:tag("item", { jid = jid, name = room_name }):up();
			end
		end
	end
end);

module:hook("muc-room-created", function(event)
	track_room(event.room);
end, -1000);

module:hook("muc-room-destroyed",function(event)
	local room = event.room;
	forget_room(room);
	delete_room(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);
				return room:handle_first_presence(origin, stanza);
			elseif stanza.attr.type ~= "error" then
				origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
				return true;
			else
				return;
			end
		end
		return room[method](room, origin, stanza);
	end, -2)
end

function shutdown_component()
	for room in each_room(true) do
		room:save(nil, true);
	end
end
module:hook_global("server-stopping", shutdown_component, -300);

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()
		return { rooms = array.collect(each_room()):pluck("jid"):sort(); };
	end, function(fields, errors)
		if errors then
			local errmsg = {};
			for field, err in pairs(errors) do
				errmsg[#errmsg + 1] = field .. ": " .. 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