prosody
27f76695f43b
plugins/mod_muc.lua

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plugins/mod_muc.lua @ 666:27f76695f43b

Initial mod_muc: XEP-0045: Multi-User Chat
author Waqas Hussain <waqas20@gmail.com>
date Wed, 31 Dec 2008 10:16:42 +0500
child 668:50072761e02d
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665:09e0e9c722a3 666:27f76695f43b
1
2
3 local register_component = require "core.componentmanager".register_component;
4 local jid_split = require "util.jid".split;
5 local jid_bare = require "util.jid".bare;
6 local st = require "util.stanza";
7 local log = require "util.logger".init("mod_muc");
8 local multitable_new = require "util.multitable".new;
9
10 local muc_domain = "conference."..module:get_host();
11 local muc_name = "MUCMUCMUC!!!";
12
13 local rooms = multitable_new();
14 local jid_nick = multitable_new();
15 local rooms_info = multitable_new();
16
17 local component;
18
19 function getUsingPath(stanza, path, getText)
20 local tag = stanza;
21 for _, name in ipairs(path) do
22 if type(tag) ~= 'table' then return; end
23 tag = tag:child_with_name(name);
24 end
25 if tag and getText then tag = table.concat(tag); end
26 return tag;
27 end
28 function getTag(stanza, path) return getUsingPath(stanza, path); end
29 function getText(stanza, path) return getUsingPath(stanza, path, true); end
30
31 function get_disco_info(stanza)
32 return st.iq({type='result', id=stanza.attr.id, from=muc_domain, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")
33 :tag("identity", {category='conference', type='text', name=muc_name}):up()
34 :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply
35 end
36 function get_disco_items(stanza)
37 local reply = st.iq({type='result', id=stanza.attr.id, from=muc_domain, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
38 for room in pairs(rooms_info:get()) do
39 reply:tag("item", {jid=room, name=rooms_info:get(room, "name")}):up();
40 end
41 return reply; -- TODO cache disco reply
42 end
43 function get_room_disco_info(stanza)
44 return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")
45 :tag("identity", {category='conference', type='text', name=rooms_info:get(stanza.attr.to, "name")}):up()
46 :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply
47 end
48 function get_room_disco_items(stanza)
49 return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
50 end -- TODO allow non-private rooms
51
52 function broadcast_presence(type, from, room, code)
53 local data = rooms:get(room, from);
54 local stanza = st.presence({type=type, from=from})
55 :tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
56 :tag("item", {affiliation=data.affiliation, role=data.role}):up();
57 if code then
58 stanza:tag("status", {code=code}):up();
59 end
60 local me;
61 local r = rooms:get(room);
62 if r then
63 for occupant, o_data in pairs(r) do
64 if occupant ~= from then
65 stanza.attr.to = o_data.jid;
66 core_route_stanza(component, stanza);
67 else
68 me = o_data.jid;
69 end
70 end
71 end
72 if me then
73 stanza:tag("status", {code='110'});
74 stanza.attr.to = me;
75 core_route_stanza(component, stanza);
76 end
77 end
78 function broadcast_message(from, room, subject, body)
79 local stanza = st.message({type='groupchat', from=from});
80 if subject then stanza:tag('subject'):text(subject):up(); end
81 if body then stanza:tag('body'):text(body):up(); end
82 local r = rooms:get(room);
83 if r then
84 for occupant, o_data in pairs(r) do
85 stanza.attr.to = o_data.jid;
86 core_route_stanza(component, stanza);
87 end
88 end
89 end
90
91 function handle_to_occupant(origin, stanza) -- PM, vCards, etc
92 local from, to = stanza.attr.from, stanza.attr.to;
93 local room = jid_bare(to);
94 local current_nick = jid_nick:get(from, room);
95 local type = stanza.attr.type;
96 if stanza.name == "presence" then
97 if type == "error" then -- error, kick em out!
98 local data = rooms:get(room, to);
99 data.role = 'none';
100 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>
101 rooms:remove(room, to);
102 jid_nick:remove(from, room);
103 elseif type == "unavailable" then -- unavailable
104 if current_nick == to then
105 local data = rooms:get(room, to);
106 data.role = 'none';
107 broadcast_presence('unavailable', to, room);
108 rooms:remove(room, to);
109 jid_nick:remove(from, room);
110 end -- TODO else do nothing?
111 elseif not type then -- available
112 if current_nick then
113 if current_nick == to then -- simple presence
114 -- TODO broadcast
115 else -- change nick
116 if rooms:get(room, to) then
117 origin.send(st.error_reply(stanza, "cancel", "conflict"));
118 else
119 local data = rooms:get(room, current_nick);
120 broadcast_presence('unavailable', current_nick, room, '303');
121 rooms:remove(room, current_nick);
122 rooms:set(room, to, data);
123 jid_nick:set(from, room, to);
124 broadcast_presence(nil, to, room);
125 end
126 end
127 else -- enter room
128 if rooms:get(room, to) then
129 origin.send(st.error_reply(stanza, "cancel", "conflict"));
130 else
131 local data = {affiliation='none', role='participant', jid=from};
132 rooms:set(room, to, data);
133 jid_nick:set(from, room, to);
134 local r = rooms:get(room);
135 if r then
136 for occupant, o_data in pairs(r) do
137 if occupant ~= from then
138 local pres = st.presence({to=from, from=occupant})
139 :tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
140 :tag("item", {affiliation=o_data.affiliation, role=o_data.role}):up();
141 core_route_stanza(component, pres);
142 end
143 end
144 end
145 broadcast_presence(nil, to, room);
146 end
147 end
148 elseif type ~= 'result' then -- bad type
149 origin.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME correct error?
150 end
151 elseif stanza.name == "message" and type == "groupchat" then
152 -- groupchat messages not allowed in PM
153 origin.send(st.error_reply(stanza, "modify", "bad-request"));
154 else
155 origin.send(st.error_reply(stanza, "cancel", "not-implemented", "Private stanzas not implemented")); -- TODO route private stanza
156 end
157 end
158
159 function handle_to_room(origin, stanza) -- presence changes and groupchat messages, along with disco/etc
160 local type = stanza.attr.type;
161 if stanza.name == "iq" and type == "get" then -- disco requests
162 local xmlns = stanza.tags[1].attr.xmlns;
163 if xmlns == "http://jabber.org/protocol/disco#info" then
164 origin.send(get_room_disco_info(stanza));
165 elseif xmlns == "http://jabber.org/protocol/disco#items" then
166 origin.send(get_room_disco_items(stanza));
167 else
168 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
169 end
170 elseif stanza.name == "message" and type == "groupchat" then
171 local from, to = stanza.attr.from, stanza.attr.to;
172 local room = jid_bare(to);
173 local current_nick = jid_nick:get(from, room);
174 if not current_nick then -- not in room
175 origin.send(st.error_reply(stanza, "cancel", "not-acceptable"));
176 else
177 broadcast_message(current_nick, room, getText(stanza, {"subject"}), getText(stanza, {"body"}));
178 end
179 else
180 if type == "error" or type == "result" then return; end
181 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
182 end
183 end
184
185 function handle_to_domain(origin, stanza)
186 local type = stanza.attr.type;
187 if type == "error" or type == "result" then return; end
188 if stanza.name == "iq" and type == "get" then
189 local xmlns = stanza.tags[1].attr.xmlns;
190 if xmlns == "http://jabber.org/protocol/disco#info" then
191 origin.send(get_disco_info(stanza));
192 elseif xmlns == "http://jabber.org/protocol/disco#items" then
193 origin.send(get_disco_items(stanza));
194 else
195 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc
196 end
197 else
198 origin.send(st.error_reply(stanza, "cancel", "service-unavailable", "The muc server doesn't deal with messages and presence directed at it"));
199 end
200 end
201
202 component = register_component(muc_domain, function(origin, stanza)
203 local to_node, to_host, to_resource = jid_split(stanza.attr.to);
204 if stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
205 if type == "error" or type == "result" then return; end
206 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME what's appropriate?
207 elseif to_resource and not to_node then
208 if type == "error" or type == "result" then return; end
209 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- host/resource
210 elseif to_resource then
211 handle_to_occupant(origin, stanza);
212 elseif to_node then
213 handle_to_room(origin, stanza)
214 else -- to the main muc domain
215 if type == "error" or type == "result" then return; end
216 handle_to_domain(origin, stanza);
217 end
218 end);