2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
10 local jid_bare = require "util.jid".bare;
11 local jid_split = require "util.jid".split;
12 local st = require "util.stanza";
14 local user_exists = require "core.usermanager".user_exists;
15 local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;
16 local pairs, ipairs = pairs, ipairs;
19 local calculate_hash = require "util.caps".calculate_hash;
23 local recipients = {};
26 module.save = function()
27 return { data = data, recipients = recipients, hash_map = hash_map };
29 module.restore = function(state)
30 data = state.data or {};
31 recipients = state.recipients or {};
32 hash_map = state.hash_map or {};
35 module:add_identity("pubsub", "pep", "Prosody");
36 module:add_feature("http://jabber.org/protocol/pubsub#publish");
38 local function subscription_presence(user_bare, recipient)
39 local recipient_bare = jid_bare(recipient);
40 if (recipient_bare == user_bare) then return true end
41 local username, host = jid_split(user_bare);
42 return is_contact_subscribed(username, host, recipient_bare);
45 local function publish(session, node, id, item)
46 item.attr.xmlns = nil;
47 local disable = #item.tags ~= 1 or #item.tags[1] == 0;
48 if #item.tags == 0 then item.name = "retract"; end
49 local bare = session.username..'@'..session.host;
50 local stanza = st.message({from=bare, type='headline'})
51 :tag('event', {xmlns='http://jabber.org/protocol/pubsub#event'})
52 :tag('items', {node=node})
57 -- store for the future
58 local user_data = data[bare];
61 user_data[node] = nil;
62 if not next(user_data) then data[bare] = nil; end
65 if not user_data then user_data = {}; data[bare] = user_data; end
66 user_data[node] = {id or "1", item};
70 for recipient, notify in pairs(recipients[bare] or NULL) do
72 stanza.attr.to = recipient;
73 core_post_stanza(session, stanza);
77 local function publish_all(user, recipient, session)
79 local notify = recipients[user] and recipients[user][recipient];
81 for node in pairs(notify) do
83 local id, item = unpack(d[node]);
84 session.send(st.message({from=user, to=recipient, type='headline'})
85 :tag('event', {xmlns='http://jabber.org/protocol/pubsub#event'})
86 :tag('items', {node=node})
95 local function get_caps_hash_from_presence(stanza, current)
96 local t = stanza.attr.type;
98 for _, child in pairs(stanza.tags) do
99 if child.name == "c" and child.attr.xmlns == "http://jabber.org/protocol/caps" then
100 local attr = child.attr;
101 if attr.hash then -- new caps
102 if attr.hash == 'sha-1' and attr.node and attr.ver then return attr.ver, attr.node.."#"..attr.ver; end
104 if attr.node and attr.ver then return attr.node.."#"..attr.ver.."#"..(attr.ext or ""), attr.node.."#"..attr.ver; end
106 return; -- bad caps format
109 elseif t == "unavailable" or t == "error" then
112 return current; -- no caps, could mean caps optimization, so return current
115 module:hook("presence/bare", function(event)
116 -- inbound presence to bare JID recieved
117 local origin, stanza = event.origin, event.stanza;
118 local user = stanza.attr.to or (origin.username..'@'..origin.host);
119 local t = stanza.attr.type;
121 if not t then -- available presence
122 if not stanza.attr.to or subscription_presence(user, stanza.attr.from) then
123 local recipient = stanza.attr.from;
124 local current = recipients[user] and recipients[user][recipient];
125 local hash = get_caps_hash_from_presence(stanza, current);
126 if current == hash then return; end
128 if recipients[user] then recipients[user][recipient] = nil; end
130 recipients[user] = recipients[user] or {};
131 if hash_map[hash] then
132 recipients[user][recipient] = hash_map[hash];
133 publish_all(user, recipient, origin);
135 recipients[user][recipient] = hash;
137 st.stanza("iq", {from=stanza.attr.to, to=stanza.attr.from, id="disco", type="get"})
138 :query("http://jabber.org/protocol/disco#info")
143 elseif t == "unavailable" then
144 if recipients[user] then recipients[user][stanza.attr.from] = nil; end
148 module:hook("iq/bare/http://jabber.org/protocol/pubsub:pubsub", function(event)
149 local session, stanza = event.origin, event.stanza;
150 local payload = stanza.tags[1];
152 if stanza.attr.type == 'set' and (not stanza.attr.to or jid_bare(stanza.attr.from) == stanza.attr.to) then
153 payload = payload.tags[1];
154 if payload and (payload.name == 'publish' or payload.name == 'retract') and payload.attr.node then -- <publish node='http://jabber.org/protocol/tune'>
155 local node = payload.attr.node;
156 payload = payload.tags[1];
157 if payload and payload.name == "item" then -- <item>
158 local id = payload.attr.id;
159 session.send(st.reply(stanza));
160 publish(session, node, id, st.clone(payload));
164 elseif stanza.attr.type == 'get' then
165 local user = stanza.attr.to and jid_bare(stanza.attr.to) or session.username..'@'..session.host;
166 if subscription_presence(user, stanza.attr.from) then
167 local user_data = data[user];
168 local node, requested_id;
169 payload = payload.tags[1];
170 if payload and payload.name == 'items' then
171 node = payload.attr.node;
172 local item = payload.tags[1];
173 if item and item.name == "item" then
174 requested_id = item.attr.id;
177 if node and user_data and user_data[node] then -- Send the last item
178 local id, item = unpack(user_data[node]);
179 if not requested_id or id == requested_id then
180 local stanza = st.reply(stanza)
181 :tag('pubsub', {xmlns='http://jabber.org/protocol/pubsub'})
182 :tag('items', {node=node})
186 session.send(stanza);
188 else -- requested item doesn't exist
189 local stanza = st.reply(stanza)
190 :tag('pubsub', {xmlns='http://jabber.org/protocol/pubsub'})
191 :tag('items', {node=node})
193 session.send(stanza);
196 elseif node then -- node doesn't exist
197 session.send(st.error_reply(stanza, 'cancel', 'item-not-found'));
199 else --invalid request
200 session.send(st.error_reply(stanza, 'modify', 'bad-request'));
203 else --no presence subscription
204 session.send(st.error_reply(stanza, 'auth', 'not-authorized')
205 :tag('presence-subscription-required', {xmlns='http://jabber.org/protocol/pubsub#errors'}));
211 module:hook("iq-result/bare/disco", function(event)
212 local session, stanza = event.origin, event.stanza;
213 if stanza.attr.type == "result" then
214 local disco = stanza.tags[1];
215 if disco and disco.name == "query" and disco.attr.xmlns == "http://jabber.org/protocol/disco#info" then
216 -- Process disco response
217 local user = stanza.attr.to or (session.username..'@'..session.host);
218 local contact = stanza.attr.from;
219 local current = recipients[user] and recipients[user][contact];
220 if type(current) ~= "string" then return; end -- check if waiting for recipient's response
222 if not string.find(current, "#") then
223 ver = calculate_hash(disco.tags); -- calculate hash
226 for _, feature in pairs(disco.tags) do
227 if feature.name == "feature" and feature.attr.var then
228 local nfeature = feature.attr.var:match("^(.*)%+notify$");
229 if nfeature then notify[nfeature] = true; end
232 hash_map[ver] = notify; -- update hash map
233 recipients[user][contact] = notify; -- set recipient's data to calculated data
234 -- send messages to recipient
235 publish_all(user, contact, session);
240 module:hook("account-disco-info", function(event)
241 local stanza = event.stanza;
242 stanza:tag('identity', {category='pubsub', type='pep'}):up();
243 stanza:tag('feature', {var='http://jabber.org/protocol/pubsub#publish'}):up();
246 module:hook("account-disco-items", function(event)
247 local stanza = event.stanza;
248 local bare = stanza.attr.to;
249 local user_data = data[bare];
252 for node, _ in pairs(user_data) do
253 stanza:tag('item', {jid=bare, node=node}):up(); -- TODO we need to handle queries to these nodes