aboutsummaryrefslogtreecommitdiffstats
path: root/core/rostermanager.lua
blob: a33152457f3985f2380976bb60d2211058e7dabf (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
-- 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.
--




local log = require "util.logger".init("rostermanager");

local setmetatable = setmetatable;
local format = string.format;
local loadfile, setfenv, pcall = loadfile, setfenv, pcall;
local pairs, ipairs = pairs, ipairs;
local tostring = tostring;

local hosts = hosts;
local bare_sessions = bare_sessions;

local datamanager = require "util.datamanager"
local st = require "util.stanza";

module "rostermanager"

function add_to_roster(session, jid, item)
	if session.roster then
		local old_item = session.roster[jid];
		session.roster[jid] = item;
		if save_roster(session.username, session.host) then
			return true;
		else
			session.roster[jid] = old_item;
			return nil, "wait", "internal-server-error", "Unable to save roster";
		end
	else
		return nil, "auth", "not-authorized", "Session's roster not loaded";
	end
end

function remove_from_roster(session, jid)
	if session.roster then
		local old_item = session.roster[jid];
		session.roster[jid] = nil;
		if save_roster(session.username, session.host) then
			return true;
		else
			session.roster[jid] = old_item;
			return nil, "wait", "internal-server-error", "Unable to save roster";
		end
	else
		return nil, "auth", "not-authorized", "Session's roster not loaded";
	end
end

function roster_push(username, host, jid)
	local roster = jid and jid ~= "pending" and hosts[host] and hosts[host].sessions[username] and hosts[host].sessions[username].roster;
	if roster then
		local item = hosts[host].sessions[username].roster[jid];
		local stanza = st.iq({type="set"});
		stanza:tag("query", {xmlns = "jabber:iq:roster", ver = tostring(roster[false].version or "1")  });
		if item then
			stanza:tag("item", {jid = jid, subscription = item.subscription, name = item.name, ask = item.ask});
			for group in pairs(item.groups) do
				stanza:tag("group"):text(group):up();
			end
		else
			stanza:tag("item", {jid = jid, subscription = "remove"});
		end
		stanza:up(); -- move out from item
		stanza:up(); -- move out from stanza
		-- stanza ready
		for _, session in pairs(hosts[host].sessions[username].sessions) do
			if session.interested then
				-- FIXME do we need to set stanza.attr.to?
				session.send(stanza);
			end
		end
	end
end

function load_roster(username, host)
	local jid = username.."@"..host;
	log("debug", "load_roster: asked for: "..jid);
	local user = bare_sessions[jid];
	local roster;
	if user then
		roster = user.roster;
		if roster then return roster; end
		log("debug", "load_roster: loading for new user: "..username.."@"..host);
	else -- Attempt to load roster for non-loaded user
		log("debug", "load_roster: loading for offline user: "..username.."@"..host);
	end
	local data, err = datamanager.load(username, host, "roster");
	roster = data or {};
	if user then user.roster = roster; end
	if not roster[false] then roster[false] = { }; end
	if roster[jid] then
		roster[jid] = nil;
		log("warn", "roster for "..jid.." has a self-contact");
	end
	if not err then
		hosts[host].events.fire_event("roster-load", username, host, roster);
	end
	return roster, err;
end

function save_roster(username, host, roster)
	log("debug", "save_roster: saving roster for "..username.."@"..host);
	if not roster then
		roster = hosts[host] and hosts[host].sessions[username] and hosts[host].sessions[username].roster;
		--if not roster then
		--	--roster = load_roster(username, host);
		--	return true; -- roster unchanged, no reason to save
		--end
	end
	if roster then
		local metadata = roster[false];
		if not metadata then
			metadata = {};
			roster[false] = metadata;
		end
		if metadata.version ~= true then
			metadata.version = (metadata.version or 0) + 1;
		end
		return datamanager.store(username, host, "roster", roster);
	end
	log("warn", "save_roster: user had no roster to save");
	return nil;
end

function process_inbound_subscription_approval(username, host, jid)
	local roster = load_roster(username, host);
	local item = roster[jid];
	if item and item.ask then
		if item.subscription == "none" then
			item.subscription = "to";
		else -- subscription == from
			item.subscription = "both";
		end
		item.ask = nil;
		return save_roster(username, host, roster);
	end
end

function process_inbound_subscription_cancellation(username, host, jid)
	local roster = load_roster(username, host);
	local item = roster[jid];
	local changed = nil;
	if is_contact_pending_out(username, host, jid) then
		item.ask = nil;
		changed = true;
	end
	if item then
		if item.subscription == "to" then
			item.subscription = "none";
			changed = true;
		elseif item.subscription == "both" then
			item.subscription = "from";
			changed = true;
		end
	end
	if changed then
		return save_roster(username, host, roster);
	end
end

function process_inbound_unsubscribe(username, host, jid)
	local roster = load_roster(username, host);
	local item = roster[jid];
	local changed = nil;
	if is_contact_pending_in(username, host, jid) then
		roster.pending[jid] = nil; -- TODO maybe delete roster.pending if empty?
		changed = true;
	end
	if item then
		if item.subscription == "from" then
			item.subscription = "none";
			changed = true;
		elseif item.subscription == "both" then
			item.subscription = "to";
			changed = true;
		end
	end
	if changed then
		return save_roster(username, host, roster);
	end
end

function is_contact_subscribed(username, host, jid)
	local roster = load_roster(username, host);
	local item = roster[jid];
	return item and (item.subscription == "from" or item.subscription == "both");
end

function is_contact_pending_in(username, host, jid)
	local roster = load_roster(username, host);
	return roster.pending and roster.pending[jid];
end
function set_contact_pending_in(username, host, jid, pending)
	local roster = load_roster(username, host);
	local item = roster[jid];
	if item and (item.subscription == "from" or item.subscription == "both") then
		return; -- false
	end
	if not roster.pending then roster.pending = {}; end
	roster.pending[jid] = true;
	return save_roster(username, host, roster);
end
function is_contact_pending_out(username, host, jid)
	local roster = load_roster(username, host);
	local item = roster[jid];
	return item and item.ask;
end
function set_contact_pending_out(username, host, jid) -- subscribe
	local roster = load_roster(username, host);
	local item = roster[jid];
	if item and (item.ask or item.subscription == "to" or item.subscription == "both") then
		return true;
	end
	if not item then
		item = {subscription = "none", groups = {}};
		roster[jid] = item;
	end
	item.ask = "subscribe";
	log("debug", "set_contact_pending_out: saving roster; set "..username.."@"..host..".roster["..jid.."].ask=subscribe");
	return save_roster(username, host, roster);
end
function unsubscribe(username, host, jid)
	local roster = load_roster(username, host);
	local item = roster[jid];
	if not item then return false; end
	if (item.subscription == "from" or item.subscription == "none") and not item.ask then
		return true;
	end
	item.ask = nil;
	if item.subscription == "both" then
		item.subscription = "from";
	elseif item.subscription == "to" then
		item.subscription = "none";
	end
	return save_roster(username, host, roster);
end
function subscribed(username, host, jid)
	if is_contact_pending_in(username, host, jid) then
		local roster = load_roster(username, host);
		local item = roster[jid];
		if not item then -- FIXME should roster item be auto-created?
			item = {subscription = "none", groups = {}};
			roster[jid] = item;
		end
		if item.subscription == "none" then
			item.subscription = "from";
		else -- subscription == to
			item.subscription = "both";
		end
		roster.pending[jid] = nil;
		-- TODO maybe remove roster.pending if empty
		return save_roster(username, host, roster);
	end -- TODO else implement optional feature pre-approval (ask = subscribed)
end
function unsubscribed(username, host, jid)
	local roster = load_roster(username, host);
	local item = roster[jid];
	local pending = is_contact_pending_in(username, host, jid);
	local changed = nil;
	if is_contact_pending_in(username, host, jid) then
		roster.pending[jid] = nil; -- TODO maybe delete roster.pending if empty?
		changed = true;
	end
	if item then
		if item.subscription == "from" then
			item.subscription = "none";
			changed = true;
		elseif item.subscription == "both" then
			item.subscription = "to";
			changed = true;
		end
	end
	if changed then
		return save_roster(username, host, roster);
	end
end

function process_outbound_subscription_request(username, host, jid)
	local roster = load_roster(username, host);
	local item = roster[jid];
	if item and (item.subscription == "none" or item.subscription == "from") then
		item.ask = "subscribe";
		return save_roster(username, host, roster);
	end
end

--[[function process_outbound_subscription_approval(username, host, jid)
	local roster = load_roster(username, host);
	local item = roster[jid];
	if item and (item.subscription == "none" or item.subscription == "from" then
		item.ask = "subscribe";
		return save_roster(username, host, roster);
	end
end]]



return _M;