prosody
a2dd83bc3afa
plugins/mod_presence.lua

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plugins/mod_presence.lua @ 1009:a2dd83bc3afa

mod_presence: initial commit
author Waqas Hussain <waqas20@gmail.com>
date Wed, 15 Apr 2009 02:10:51 +0500
child 1011:beb039827c9f
comparison
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1008:da7691ebec9c 1009:a2dd83bc3afa
1 -- Prosody IM v0.4
2 -- Copyright (C) 2008-2009 Matthew Wild
3 -- Copyright (C) 2008-2009 Waqas Hussain
4 --
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
7 --
8
9
10
11 local log = require "util.logger".init("mod_presence")
12
13 local require = require;
14 local pairs, ipairs = pairs, ipairs;
15 local t_concat = table.concat;
16 local s_find = string.find;
17 local tonumber = tonumber;
18
19 local st = require "util.stanza";
20 local jid_split = require "util.jid".split;
21 local jid_bare = require "util.jid".bare;
22 local hosts = hosts;
23
24 local rostermanager = require "core.rostermanager";
25 local sessionmanager = require "core.sessionmanager";
26 local offlinemanager = require "core.offlinemanager";
27
28 function handle_presence(origin, stanza, from_bare, to_bare, core_route_stanza, inbound)
29 local type = stanza.attr.type;
30 if type and type ~= "unavailable" and type ~= "error" then
31 if inbound then
32 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
33 else
34 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
35 end
36 elseif not inbound and not stanza.attr.to then
37 handle_normal_presence(origin, stanza, core_route_stanza);
38 else
39 core_route_stanza(origin, stanza);
40 end
41 end
42
43 function handle_normal_presence(origin, stanza, core_route_stanza)
44 if origin.roster then
45 for jid in pairs(origin.roster) do -- broadcast to all interested contacts
46 local subscription = origin.roster[jid].subscription;
47 if subscription == "both" or subscription == "from" then
48 stanza.attr.to = jid;
49 core_route_stanza(origin, stanza);
50 end
51 end
52 local node, host = jid_split(stanza.attr.from);
53 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources
54 if res ~= origin and res.full_jid then -- to resource. FIXME is res.full_jid the correct check? Maybe it should be res.presence
55 stanza.attr.to = res.full_jid;
56 core_route_stanza(origin, stanza);
57 end
58 end
59 if stanza.attr.type == nil and not origin.presence then -- initial presence
60 local probe = st.presence({from = origin.full_jid, type = "probe"});
61 for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to
62 local subscription = origin.roster[jid].subscription;
63 if subscription == "both" or subscription == "to" then
64 probe.attr.to = jid;
65 core_route_stanza(origin, probe);
66 end
67 end
68 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources
69 if res ~= origin and res.presence then
70 res.presence.attr.to = origin.full_jid;
71 core_route_stanza(res, res.presence);
72 res.presence.attr.to = nil;
73 end
74 end
75 if origin.roster.pending then -- resend incoming subscription requests
76 for jid in pairs(origin.roster.pending) do
77 origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original?
78 end
79 end
80 local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host});
81 for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests
82 if item.ask then
83 request.attr.to = jid;
84 core_route_stanza(origin, request);
85 end
86 end
87 local offline = offlinemanager.load(node, host);
88 if offline then
89 for _, msg in ipairs(offline) do
90 origin.send(msg); -- FIXME do we need to modify to/from in any way?
91 end
92 offlinemanager.deleteAll(node, host);
93 end
94 end
95 origin.priority = 0;
96 if stanza.attr.type == "unavailable" then
97 origin.presence = nil;
98 if origin.directed then
99 local old_from = stanza.attr.from;
100 stanza.attr.from = origin.full_jid;
101 for jid in pairs(origin.directed) do
102 stanza.attr.to = jid;
103 core_route_stanza(origin, stanza);
104 end
105 stanza.attr.from = old_from;
106 origin.directed = nil;
107 end
108 else
109 origin.presence = stanza;
110 local priority = stanza:child_with_name("priority");
111 if priority and #priority > 0 then
112 priority = t_concat(priority);
113 if s_find(priority, "^[+-]?[0-9]+$") then
114 priority = tonumber(priority);
115 if priority < -128 then priority = -128 end
116 if priority > 127 then priority = 127 end
117 origin.priority = priority;
118 end
119 end
120 end
121 stanza.attr.to = nil; -- reset it
122 else
123 log("error", "presence recieved from client with no roster");
124 end
125 end
126
127 function send_presence_of_available_resources(user, host, jid, recipient_session, core_route_stanza)
128 local h = hosts[host];
129 local count = 0;
130 if h and h.type == "local" then
131 local u = h.sessions[user];
132 if u then
133 for k, session in pairs(u.sessions) do
134 local pres = session.presence;
135 if pres then
136 pres.attr.to = jid;
137 pres.attr.from = session.full_jid;
138 core_route_stanza(session, pres);
139 pres.attr.to = nil;
140 pres.attr.from = nil;
141 count = count + 1;
142 end
143 end
144 end
145 end
146 log("info", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid);
147 return count;
148 end
149
150 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza)
151 local node, host = jid_split(from_bare);
152 local st_from, st_to = stanza.attr.from, stanza.attr.to;
153 stanza.attr.from, stanza.attr.to = from_bare, to_bare;
154 log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
155 if stanza.attr.type == "subscribe" then
156 -- 1. route stanza
157 -- 2. roster push (subscription = none, ask = subscribe)
158 if rostermanager.set_contact_pending_out(node, host, to_bare) then
159 rostermanager.roster_push(node, host, to_bare);
160 end -- else file error
161 core_route_stanza(origin, stanza);
162 elseif stanza.attr.type == "unsubscribe" then
163 -- 1. route stanza
164 -- 2. roster push (subscription = none or from)
165 if rostermanager.unsubscribe(node, host, to_bare) then
166 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed?
167 end -- else file error
168 core_route_stanza(origin, stanza);
169 elseif stanza.attr.type == "subscribed" then
170 -- 1. route stanza
171 -- 2. roster_push ()
172 -- 3. send_presence_of_available_resources
173 if rostermanager.subscribed(node, host, to_bare) then
174 rostermanager.roster_push(node, host, to_bare);
175 end
176 core_route_stanza(origin, stanza);
177 send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza);
178 elseif stanza.attr.type == "unsubscribed" then
179 -- 1. route stanza
180 -- 2. roster push (subscription = none or to)
181 if rostermanager.unsubscribed(node, host, to_bare) then
182 rostermanager.roster_push(node, host, to_bare);
183 end
184 core_route_stanza(origin, stanza);
185 end
186 stanza.attr.from, stanza.attr.to = st_from, st_to;
187 end
188
189 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza)
190 local node, host = jid_split(to_bare);
191 local st_from, st_to = stanza.attr.from, stanza.attr.to;
192 stanza.attr.from, stanza.attr.to = from_bare, to_bare;
193 log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
194 if stanza.attr.type == "probe" then
195 if rostermanager.is_contact_subscribed(node, host, from_bare) then
196 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then
197 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too)
198 end
199 else
200 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"}));
201 end
202 elseif stanza.attr.type == "subscribe" then
203 if rostermanager.is_contact_subscribed(node, host, from_bare) then
204 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed
205 -- Sending presence is not clearly stated in the RFC, but it seems appropriate
206 if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then
207 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too)
208 end
209 else
210 if not rostermanager.is_contact_pending_in(node, host, from_bare) then
211 if rostermanager.set_contact_pending_in(node, host, from_bare) then
212 sessionmanager.send_to_available_resources(node, host, stanza);
213 end -- TODO else return error, unable to save
214 end
215 end
216 elseif stanza.attr.type == "unsubscribe" then
217 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then
218 rostermanager.roster_push(node, host, from_bare);
219 end
220 elseif stanza.attr.type == "subscribed" then
221 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then
222 rostermanager.roster_push(node, host, from_bare);
223 end
224 elseif stanza.attr.type == "unsubscribed" then
225 if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then
226 rostermanager.roster_push(node, host, from_bare);
227 end
228 end -- discard any other type
229 stanza.attr.from, stanza.attr.to = st_from, st_to;
230 end
231
232 local function presence_handler(data)
233 local origin, stanza = data.origin, data.stanza;
234 local to = stanza.attr.to;
235 local node, host = jid_split(to);
236 local to_bare = jid_bare(to);
237 local from_bare = jid_bare(stanza.attr.from);
238 if origin.type == "c2s" then
239 if to ~= nil and not(origin.roster[to_bare] and (origin.roster[to_bare].subscription == "both" or origin.roster[to_bare].subscription == "from")) then -- directed presence
240 origin.directed = origin.directed or {};
241 origin.directed[to] = true;
242 end
243 if to == nil and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
244 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
245 elseif not to then
246 handle_normal_presence(origin, stanza);
247 else
248 core_route_stanza(origin, stanza);
249 end
250 elseif (origin.type == "s2sin" or origin.type == "component") and hosts[host] then
251 if to == nil and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
252 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
253 else
254 core_route_stanza(origin, stanza);
255 end
256 end
257 end
258
259 local add_handler = require "core.eventmanager2".add_handler;
260 local remove_handler = require "core.eventmanager2".remove_handler;
261
262 add_handler(module:get_host().."/presence", presence_handler);
263 module.unload = function()
264 remove_handler(module:get_host().."/presence", presence_handler);
265 end
266
267 return _M;