aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/mod_pubsub/pubsub.lib.lua
blob: 57055462465ae572c292adb09f04bd632654a8af (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
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
local t_unpack = table.unpack or unpack; -- luacheck: ignore 113
local time_now = os.time;

local st = require "util.stanza";
local uuid_generate = require "util.uuid".generate;
local dataform = require"util.dataforms".new;

local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
local xmlns_pubsub_errors = "http://jabber.org/protocol/pubsub#errors";
local xmlns_pubsub_owner = "http://jabber.org/protocol/pubsub#owner";

local _M = {};

local handlers = {};
_M.handlers = handlers;

local pubsub_errors = {
	["conflict"] = { "cancel", "conflict" };
	["invalid-jid"] = { "modify", "bad-request", nil, "invalid-jid" };
	["jid-required"] = { "modify", "bad-request", nil, "jid-required" };
	["nodeid-required"] = { "modify", "bad-request", nil, "nodeid-required" };
	["item-not-found"] = { "cancel", "item-not-found" };
	["not-subscribed"] = { "modify", "unexpected-request", nil, "not-subscribed" };
	["forbidden"] = { "auth", "forbidden" };
	["not-allowed"] = { "cancel", "not-allowed" };
};
local function pubsub_error_reply(stanza, error)
	local e = pubsub_errors[error];
	local reply = st.error_reply(stanza, t_unpack(e, 1, 3));
	if e[4] then
		reply:tag(e[4], { xmlns = xmlns_pubsub_errors }):up();
	end
	return reply;
end
_M.pubsub_error_reply = pubsub_error_reply;

local node_config_form = dataform {
	{
		type = "hidden";
		name = "FORM_TYPE";
		value = "http://jabber.org/protocol/pubsub#node_config";
	};
	{
		type = "text-single";
		name = "pubsub#max_items";
		label = "Max # of items to persist";
	};
};

function handlers.get_items(origin, stanza, items, service)
	local node = items.attr.node;
	local item = items:get_child("item");
	local item_id = item and item.attr.id;

	if not node then
		origin.send(pubsub_error_reply(stanza, "nodeid-required"));
		return true;
	end
	local ok, results = service:get_items(node, stanza.attr.from, item_id);
	if not ok then
		origin.send(pubsub_error_reply(stanza, results));
		return true;
	end

	local data = st.stanza("items", { node = node });
	for _, id in ipairs(results) do
		data:add_child(results[id]);
	end
	local reply;
	if data then
		reply = st.reply(stanza)
			:tag("pubsub", { xmlns = xmlns_pubsub })
				:add_child(data);
	else
		reply = pubsub_error_reply(stanza, "item-not-found");
	end
	origin.send(reply);
	return true;
end

function handlers.get_subscriptions(origin, stanza, subscriptions, service)
	local node = subscriptions.attr.node;
	local ok, ret = service:get_subscriptions(node, stanza.attr.from, stanza.attr.from);
	if not ok then
		origin.send(pubsub_error_reply(stanza, ret));
		return true;
	end
	local reply = st.reply(stanza)
		:tag("pubsub", { xmlns = xmlns_pubsub })
			:tag("subscriptions");
	for _, sub in ipairs(ret) do
		reply:tag("subscription", { node = sub.node, jid = sub.jid, subscription = 'subscribed' }):up();
	end
	origin.send(reply);
	return true;
end

function handlers.set_create(origin, stanza, create, service)
	local node = create.attr.node;
	local ok, ret, reply;
	if node then
		ok, ret = service:create(node, stanza.attr.from);
		if ok then
			reply = st.reply(stanza);
		else
			reply = pubsub_error_reply(stanza, ret);
		end
	else
		repeat
			node = uuid_generate();
			ok, ret = service:create(node, stanza.attr.from);
		until ok or ret ~= "conflict";
		if ok then
			reply = st.reply(stanza)
				:tag("pubsub", { xmlns = xmlns_pubsub })
					:tag("create", { node = node });
		else
			reply = pubsub_error_reply(stanza, ret);
		end
	end
	origin.send(reply);
	return true;
end

function handlers.set_delete(origin, stanza, delete, service)
	local node = delete.attr.node;

	local reply;
	if not node then
		origin.send(pubsub_error_reply(stanza, "nodeid-required"));
		return true;
	end
	local ok, ret = service:delete(node, stanza.attr.from);
	if ok then
		reply = st.reply(stanza);
	else
		reply = pubsub_error_reply(stanza, ret);
	end
	origin.send(reply);
	return true;
end

function handlers.set_subscribe(origin, stanza, subscribe, service)
	local node, jid = subscribe.attr.node, subscribe.attr.jid;
	if not (node and jid) then
		origin.send(pubsub_error_reply(stanza, jid and "nodeid-required" or "invalid-jid"));
		return true;
	end
	--[[
	local options_tag, options = stanza.tags[1]:get_child("options"), nil;
	if options_tag then
		options = options_form:data(options_tag.tags[1]);
	end
	--]]
	local options_tag, options; -- FIXME
	local ok, ret = service:add_subscription(node, stanza.attr.from, jid, options);
	local reply;
	if ok then
		reply = st.reply(stanza)
			:tag("pubsub", { xmlns = xmlns_pubsub })
				:tag("subscription", {
					node = node,
					jid = jid,
					subscription = "subscribed"
				}):up();
		if options_tag then
			reply:add_child(options_tag);
		end
	else
		reply = pubsub_error_reply(stanza, ret);
	end
	origin.send(reply);
end

function handlers.set_unsubscribe(origin, stanza, unsubscribe, service)
	local node, jid = unsubscribe.attr.node, unsubscribe.attr.jid;
	if not (node and jid) then
		origin.send(pubsub_error_reply(stanza, jid and "nodeid-required" or "invalid-jid"));
		return true;
	end
	local ok, ret = service:remove_subscription(node, stanza.attr.from, jid);
	local reply;
	if ok then
		reply = st.reply(stanza);
	else
		reply = pubsub_error_reply(stanza, ret);
	end
	origin.send(reply);
	return true;
end

function handlers.set_publish(origin, stanza, publish, service)
	local node = publish.attr.node;
	if not node then
		origin.send(pubsub_error_reply(stanza, "nodeid-required"));
		return true;
	end
	local item = publish:get_child("item");
	local id = (item and item.attr.id);
	if not id then
		id = uuid_generate();
		if item then
			item.attr.id = id;
		end
	end
	local ok, ret = service:publish(node, stanza.attr.from, id, item);
	local reply;
	if ok then
		reply = st.reply(stanza)
			:tag("pubsub", { xmlns = xmlns_pubsub })
				:tag("publish", { node = node })
					:tag("item", { id = id });
	else
		reply = pubsub_error_reply(stanza, ret);
	end
	origin.send(reply);
	return true;
end

function handlers.set_retract(origin, stanza, retract, service)
	local node, notify = retract.attr.node, retract.attr.notify;
	notify = (notify == "1") or (notify == "true");
	local item = retract:get_child("item");
	local id = item and item.attr.id
	if not (node and id) then
		origin.send(pubsub_error_reply(stanza, node and "item-not-found" or "nodeid-required"));
		return true;
	end
	local reply, notifier;
	if notify then
		notifier = st.stanza("retract", { id = id });
	end
	local ok, ret = service:retract(node, stanza.attr.from, id, notifier);
	if ok then
		reply = st.reply(stanza);
	else
		reply = pubsub_error_reply(stanza, ret);
	end
	origin.send(reply);
	return true;
end

function handlers.set_purge(origin, stanza, purge, service)
	local node, notify = purge.attr.node, purge.attr.notify;
	notify = (notify == "1") or (notify == "true");
	local reply;
	if not node then
		origin.send(pubsub_error_reply(stanza, "nodeid-required"));
		return true;
	end
	local ok, ret = service:purge(node, stanza.attr.from, notify);
	if ok then
		reply = st.reply(stanza);
	else
		reply = pubsub_error_reply(stanza, ret);
	end
	origin.send(reply);
	return true;
end

function handlers.get_configure(origin, stanza, config, service)
	local node = config.attr.node;
	if not node then
		origin.send(pubsub_error_reply(stanza, "nodeid-required"));
		return true;
	end

	if not service:may(node, stanza.attr.from, "configure") then
		origin.send(pubsub_error_reply(stanza, "forbidden"));
		return true;
	end

	local node_obj = service.nodes[node];
	if not node_obj then
		origin.send(pubsub_error_reply(stanza, "item-not-found"));
		return true;
	end

	local reply = st.reply(stanza)
		:tag("pubsub", { xmlns = xmlns_pubsub_owner })
			:tag("configure", { node = node })
				:add_child(node_config_form:form(node_obj.config));
	origin.send(reply);
	return true;
end

function handlers.set_configure(origin, stanza, config, service)
	local node = config.attr.node;
	if not node then
		origin.send(pubsub_error_reply(stanza, "nodeid-required"));
		return true;
	end
	if not service:may(node, stanza.attr.from, "configure") then
		origin.send(pubsub_error_reply(stanza, "forbidden"));
		return true;
	end
	local new_config, err = node_config_form:data(config.tags[1]);
	if not new_config then
		origin.send(st.error_reply(stanza, "modify", "bad-request", err));
		return true;
	end
	local ok, err = service:set_node_config(node, stanza.attr.from, new_config);
	if not ok then
		origin.send(pubsub_error_reply(stanza, err));
		return true;
	end
	origin.send(st.reply(stanza));
	return true;
end

function handlers.get_default(origin, stanza, default, service)
	local reply = st.reply(stanza)
		:tag("pubsub", { xmlns = xmlns_pubsub_owner })
			:tag("default")
				:add_child(node_config_form:form(service.node_defaults));
	origin.send(reply);
	return true;
end

local function create_encapsulating_item(id, payload, publisher, expose_publisher)
	local item = st.stanza("item", { id = id, xmlns = xmlns_pubsub });
	item:add_child(payload);
	if expose_publisher then
		item.attr.publisher = publisher;
	end
	return item;
end

local function simple_itemstore(archive, config, user, node, expose_publisher)
	module:log("debug", "Creation of itemstore for node %s with config %s", node, config);
	local get_set = {};
	function get_set:items()
		local store = self.store;
		local data, err = archive:find(user, { with = node });
		if not data then
			module:log("error", "Unable to get items: %s", err);
			return true;
		end
		module:log("debug", "Listed items %s from store %s", data, store);
		return function()
			local id, payload, when, publisher = data();
			if id == nil then
				return;
			end
			local item = create_encapsulating_item(id, payload, publisher, expose_publisher);
			return id, item;
		end;
	end
	function get_set:get(key)
		local store = self.store;
		local data, err = archive:find(user, {
			with = node;
			key = key;
		});
		if not data then
			module:log("error", "Unable to get item: %s", err);
			return nil, err;
		end
		-- Workaround for buggy SQL drivers which require iterating until we get a nil.
		local id, payload, when, publisher;
		for a, b, c, d in data do
			id, payload, when, publisher = a, b, c, d;
		end
		module:log("debug", "Get item %s (published at %s by %s) from store %s", id, when, publisher, store);
		if id == nil then
			return nil;
		end
		return create_encapsulating_item(id, payload, publisher, expose_publisher);
	end
	function get_set:set(key, value)
		local store = self.store;
		module:log("debug", "Set item %s to %s for %s in store %s", key, value, node, store);
		local data, err;
		if value ~= nil then
			local publisher = value.attr.publisher;
			local payload = value.tags[1];
			data, err = archive:append(user, key, payload, time_now(), node);
		else
			data, err = archive:delete(user, {
				key = key;
				with = node;
			});
		end
		if not data then
			module:log("error", "Unable to set item: %s", err);
			return nil, err;
		end
		return data;
	end
	return setmetatable(get_set, archive);
end
_M.simple_itemstore = simple_itemstore;

return _M;