aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/mod_muc.lua
blob: 8df967495416eb6c3e42ee4eedc462ce646b5b9e (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


local register_component = require "core.componentmanager".register_component;
local jid_split = require "util.jid".split;
local jid_bare = require "util.jid".bare;
local st = require "util.stanza";
local log = require "util.logger".init("mod_muc");
local multitable_new = require "util.multitable".new;

local muc_domain = "conference."..module:get_host();
local muc_name = "MUCMUCMUC!!!";

-- room_name -> room
	-- occupant_room_nick -> data
		-- affiliation = ...
		-- role
		-- jid = occupant's real jid
local rooms = multitable_new();

local jid_nick = multitable_new(); -- real jid -> room's jid -> room nick

-- room_name -> info
	-- name - the room's friendly name
	-- subject - the room's subject
	-- non-anonymous = true|nil
	-- persistent = true|nil
local rooms_info = multitable_new();

local persist_list = datamanager.load(nil, muc_domain, 'room_list') or {};
for room in pairs(persist_list) do
	rooms_info:set(room, datamanager.store(room, muc_domain, 'rooms') or nil);
end

local component;

function getUsingPath(stanza, path, getText)
	local tag = stanza;
	for _, name in ipairs(path) do
		if type(tag) ~= 'table' then return; end
		tag = tag:child_with_name(name);
	end
	if tag and getText then tag = table.concat(tag); end
	return tag;
end
function getTag(stanza, path) return getUsingPath(stanza, path); end
function getText(stanza, path) return getUsingPath(stanza, path, true); end

function get_disco_info(stanza)
	return st.iq({type='result', id=stanza.attr.id, from=muc_domain, 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
function get_disco_items(stanza)
	local reply = st.iq({type='result', id=stanza.attr.id, from=muc_domain, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
	for room in pairs(rooms_info:get()) do
		reply:tag("item", {jid=room, name=rooms_info:get(room, "name")}):up();
	end
	return reply; -- TODO cache disco reply
end
function get_room_disco_info(stanza)
	return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")
		:tag("identity", {category='conference', type='text', name=rooms_info:get(stanza.attr.to, "name")}):up()
		:tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply
end
function get_room_disco_items(stanza)
	return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
end -- TODO allow non-private rooms

function save_room(room)
	local persistent = rooms_info:get(room, 'persistent');
	if persistent then
		datamanager.store(room, muc_domain, 'rooms', rooms_info:get(room));
	end
	if persistent ~= persist_list[room] then
		if not persistent then
			datamanager.store(room, muc_domain, 'rooms', nil);
		end
		persist_list[room] = persistent;
		datamanager.store(nil, muc_domain, 'room_list', persist_list);
	end
end

function set_subject(current_nick, room, subject)
	-- TODO check nick's authority
	if subject == "" then subject = nil; end
	rooms_info:set(room, 'subject', subject);
	save_room();
	broadcast_message(current_nick, room, subject or "", nil);
	return true;
end

function broadcast_presence(type, from, room, code)
	local data = rooms:get(room, from);
	local stanza = st.presence({type=type, from=from})
		:tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
		:tag("item", {affiliation=data.affiliation, role=data.role}):up();
	if code then
		stanza:tag("status", {code=code}):up();
	end
	local me;
	local r = rooms:get(room);
	if r then
		for occupant, o_data in pairs(r) do
			if occupant ~= from then
				stanza.attr.to = o_data.jid;
				core_route_stanza(component, stanza);
			else
				me = o_data.jid;
			end
		end
	end
	if me then
		stanza:tag("status", {code='110'});
		stanza.attr.to = me;
		core_route_stanza(component, stanza);
	end
end
function broadcast_message(from, room, subject, body)
	local stanza = st.message({type='groupchat', from=from});
	if subject then stanza:tag('subject'):text(subject):up(); end
	if body then stanza:tag('body'):text(body):up(); end
	local r = rooms:get(room);
	if r then
		for occupant, o_data in pairs(r) do
			stanza.attr.to = o_data.jid;
			core_route_stanza(component, stanza);
		end
	end
end

function handle_to_occupant(origin, stanza) -- PM, vCards, etc
	local from, to = stanza.attr.from, stanza.attr.to;
	local room = jid_bare(to);
	local current_nick = jid_nick:get(from, room);
	local type = stanza.attr.type;
	if stanza.name == "presence" then
		if type == "error" then -- error, kick em out!
			local data = rooms:get(room, to);
			data.role = 'none';
			broadcast_presence('unavailable', to, room); -- TODO also add <status>This participant is kicked from the room because he sent an error presence: badformed error stanza</status>
			rooms:remove(room, to);
			jid_nick:remove(from, room);
		elseif type == "unavailable" then -- unavailable
			if current_nick == to then
				local data = rooms:get(room, to);
				data.role = 'none';
				broadcast_presence('unavailable', to, room);
				rooms:remove(room, to);
				jid_nick:remove(from, room);
			end -- TODO else do nothing?
		elseif not type then -- available
			if current_nick then
				if current_nick == to then -- simple presence
					-- TODO broadcast
				else -- change nick
					if rooms:get(room, to) then
						origin.send(st.error_reply(stanza, "cancel", "conflict"));
					else
						local data = rooms:get(room, current_nick);
						broadcast_presence('unavailable', current_nick, room, '303');
						rooms:remove(room, current_nick);
						rooms:set(room, to, data);
						jid_nick:set(from, room, to);
						broadcast_presence(nil, to, room);
					end
				end
			else -- enter room
				if rooms:get(room, to) then
					origin.send(st.error_reply(stanza, "cancel", "conflict"));
				else
					local data;
					if not rooms:get(room) and not rooms_info:get(room) then -- new room
						data = {affiliation='owner', role='moderator', jid=from};
					end
					if not data then -- new occupant
						data = {affiliation='none', role='participant', jid=from};
					end
					rooms:set(room, to, data);
					jid_nick:set(from, room, to);
					local r = rooms:get(room);
					if r then
						for occupant, o_data in pairs(r) do
							if occupant ~= from then
								local pres = st.presence({to=from, from=occupant})
									:tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
									:tag("item", {affiliation=o_data.affiliation, role=o_data.role}):up();
								core_route_stanza(component, pres);
							end
						end
					end
					broadcast_presence(nil, to, room);
					-- TODO send discussion history
					if rooms_info:get(room, 'subject') then
						core_route_stanza(component, st.message({type='groupchat', from=room, to=from}):tag("subject"):text(rooms_info:get(room, 'subject')));
					end
				end
			end
		elseif type ~= 'result' then -- bad type
			origin.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME correct error?
		end
	elseif stanza.name == "message" and type == "groupchat" then
		-- groupchat messages not allowed in PM
		origin.send(st.error_reply(stanza, "modify", "bad-request"));
	else
		origin.send(st.error_reply(stanza, "cancel", "not-implemented", "Private stanzas not implemented")); -- TODO route private stanza
	end
end

function handle_to_room(origin, stanza) -- presence changes and groupchat messages, along with disco/etc
	local type = stanza.attr.type;
	if stanza.name == "iq" and type == "get" then -- disco requests
		local xmlns = stanza.tags[1].attr.xmlns;
		if xmlns == "http://jabber.org/protocol/disco#info" then
			origin.send(get_room_disco_info(stanza));
		elseif xmlns == "http://jabber.org/protocol/disco#items" then
			origin.send(get_room_disco_items(stanza));
		else
			origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
		end
	elseif stanza.name == "message" and type == "groupchat" then
		local from, to = stanza.attr.from, stanza.attr.to;
		local room = jid_bare(to);
		local current_nick = jid_nick:get(from, room);
		if not current_nick then -- not in room
			origin.send(st.error_reply(stanza, "cancel", "not-acceptable"));
		else
			local subject = getText(stanza, {"subject"});
			if subject then
				set_subject(current_nick, room, subject);
			else
				broadcast_message(current_nick, room, nil, getText(stanza, {"body"}));
				-- TODO add to discussion history
			end
		end
	else
		if type == "error" or type == "result" then return; end
		origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
	end
end

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));
		else
			origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc
		end
	else
		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_domain, function(origin, stanza)
	local to_node, to_host, to_resource = jid_split(stanza.attr.to);
	if stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
		if type == "error" or type == "result" then return; end
		origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME what's appropriate?
	elseif to_resource and not to_node then
		if type == "error" or type == "result" then return; end
		origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- host/resource
	elseif to_resource then
		handle_to_occupant(origin, stanza);
	elseif to_node then
		handle_to_room(origin, stanza)
	else -- to the main muc domain
		if type == "error" or type == "result" then return; end
		handle_to_domain(origin, stanza);
	end
end);