summaryrefslogtreecommitdiff
path: root/xmppdaemon.php
blob: b07f44cffaa5694b2b42d32e79366a3bfd346d32 (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
#!/usr/bin/env php
<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

# Abort if called from a web server
if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
	print "This script must be run from the command line\n";
	exit();
}

define('INSTALLDIR', dirname(__FILE__));
define('LACONICA', true);

require_once(INSTALLDIR . '/lib/common.php');
require_once(INSTALLDIR . '/lib/jabber.php');

# This is kind of clunky; we create a class to call the global functions
# in jabber.php, which create a new XMPP class. A more elegant (?) solution
# might be to use make this a subclass of XMPP.

class XMPPDaemon {

	function XMPPDaemon($resource=NULL) {
		static $attrs = array('server', 'port', 'user', 'password', 'host');

		foreach ($attrs as $attr)
		{
			$this->$attr = common_config('xmpp', $attr);
		}

		if ($resource) {
			$this->resource = $resource;
		} else {
			$this->resource = common_config('xmpp', 'resource') . 'daemon';
		}

		$this->log(LOG_INFO, "{$this->user}@{$this->server}/{$this->resource}");
	}

	function connect() {
		$connect_to = ($this->host) ? $this->host : $this->server;

		$this->log(LOG_INFO, "Connecting to $connect_to on port $this->port");

		$this->conn = jabber_connect($this->resource);

		if (!$this->conn) {
			return false;
		}
		return !$this->conn->isDisconnected();
	}

	function handle() {

		static $parts = array('message', 'presence',
							  'end_stream', 'session_start');

		while(!$this->conn->disconnected) {

			$payloads = $this->conn->processUntil($parts, 10);

			if ($payloads) {
				foreach($payloads as $event) {
					$pl = $event[1];
					switch($event[0]) {
					 case 'message':
						$this->handle_message($pl);
						break;
					 case 'presence':
						$this->handle_presence($pl);
						break;
					 case 'session_start':
						$this->handle_session($pl);
						break;
					}
				}
			}

			$this->broadcast_queue();
		}
	}

	function get_user($from) {
		$user = User::staticGet('jabber', jabber_normalize_jid($from));
		return $user;
	}

	function get_confirmation($from) {
		$confirm = new Confirm_address();
		$confirm->address = $from;
		$confirm->address_type = 'jabber';
		if ($confirm->find(TRUE)) {
			return $confirm;
		} else {
			return NULL;
		}
	}

	function handle_message(&$pl) {
		if ($pl['type'] != 'chat') {
			return;
		}
		if (strlen($pl['body']) == 0) {
			return;
		}

		$from = jabber_normalize_jid($pl['from']);
		$user = $this->get_user($from);

		if (!$user) {
			$this->from_site($from, 'Unknown user; go to ' .
							 common_local_url('imsettings') .
							 ' to add your address to your account');
			$this->log(LOG_WARNING, 'Message from unknown user ' . $from);
			return;
		}
		if ($this->handle_command($user, $pl['body'])) {
			return;
		} else {
			$this->add_notice($user, $pl);
		}
	}

	function from_site($address, $msg) {
		$text = '['.common_config('site', 'name') . '] ' . $msg;
		jabber_send_message($address, $text);
	}

	function handle_command($user, $body) {
		# XXX: localise
		switch(trim($body)) {
		 case 'on':
			$this->set_notify($user, true);
			$this->from_site($user->jabber, 'notifications on');
			return true;
		 case 'off':
			$this->set_notify($user, false);
			$this->from_site($user->jabber, 'notifications off');
			return true;
		 default:
			return false;
		}
	}

	function set_notify(&$user, $notify) {
		$orig = clone($user);
		$user->jabbernotify = $notify;
		$result = $user->update($orig);
		if (!$id) {
			$last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
			$this->log(LOG_ERROR,
					   'Could not set notify flag to ' . $notify .
					   ' for user ' . common_log_objstring($user) .
					   ': ' . $last_error->message);
		} else {
			$this->log(LOG_INFO,
					   'User ' . $user->nickname . ' set notify flag to ' . $notify);
		}
	}

	function add_notice(&$user, &$pl) {
		$notice = new Notice();
		$notice->profile_id = $user->id;
		$notice->content = trim(substr($pl['body'], 0, 140));
		$notice->created = DB_DataObject_Cast::dateTime();
		$notice->query('BEGIN');
		$id = $notice->insert();
		if (!$id) {
			$last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
			$this->log(LOG_ERROR,
					   'Could not insert ' . common_log_objstring($notice) .
					   ' for user ' . common_log_objstring($user) .
					   ': ' . $last_error->message);
			return;
		}
		$orig = clone($notice);
		$notice->uri = common_notice_uri($notice);
		$result = $notice->update($orig);
		if (!$result) {
			$last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
			$this->log(LOG_ERROR,
					   'Could not add URI to ' . common_log_objstring($notice) .
					   ' for user ' . common_log_objstring($user) .
					   ': ' . $last_error->message);
			return;
		}
		$notice->query('COMMIT');
		common_broadcast_notice($notice);
		$this->log(LOG_INFO,
				   'Added notice ' . $notice->id . ' from user ' . $user->nickname);
	}

	function handle_presence(&$pl) {
		$from = jabber_normalize_jid($pl['from']);
		switch ($pl['type']) {
		 case 'subscribe':
			# We let anyone subscribe
			$this->subscribed($from);
			$this->log(LOG_INFO,
					   'Accepted subscription from ' . $from);
			break;
		 case 'subscribed':
		 case 'unsubscribed':
		 case 'unsubscribe':
			$this->log(LOG_INFO,
					   'Ignoring  "' . $pl['type'] . '" from ' . $from);
			break;
		 default:
			if (!$pl['type']) {
				$user = User::staticGet('jabber', $from);
				if (!$user) {
					$this->log(LOG_WARNING, 'Message from unknown user ' . $from);
					return;
				}
				if ($user->updatefrompresence) {
					$this->log(LOG_INFO, 'Updating ' . $user->nickname .
							   ' status from presence.');
					$this->add_notice($user, $pl);
				}
			}
			break;
		}
	}

	function log($level, $msg) {
		common_log($level, 'XMPPDaemon('.$this->resource.'): '.$msg);
	}

	function subscribed($to) {
		jabber_special_presence('subscribed', $to);
	}

	function set_status($status) {
		$this->log(LOG_INFO, 'Setting status to "' . $status . '"');
		jabber_send_presence($status);
	}

	function top_queue_item() {

		$qi = new Queue_item();
		$qi->orderBy('created');
		$qi->whereAdd('claimed is NULL');

		$qi->limit(1);

		$cnt = $qi->find(TRUE);

		if ($cnt) {
			# XXX: potential race condition
			# can we force it to only update if claimed is still NULL
			# (or old)?
			$this->log(LOG_INFO, 'claiming queue item = ' . $qi->notice_id);
			$orig = clone($qi);
			$qi->claimed = DB_DataObject_Cast::dateTime();
			$result = $qi->update($orig);
			if ($result) {
				$this->log(LOG_INFO, 'claim succeeded.');
				return $qi;
			} else {
				$this->log(LOG_INFO, 'claim failed.');
			}
		}
		$qi = NULL;
		return NULL;
	}

	function broadcast_queue() {
		$this->clear_old_claims();
		$this->log(LOG_INFO, 'checking for queued notices');
		do {
			$qi = $this->top_queue_item();
			if ($qi) {
				$this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($qi->created));
				$notice = Notice::staticGet($qi->notice_id);
				if ($notice) {
					$this->log(LOG_INFO, 'broadcasting notice ID = ' . $notice->id);
					# XXX: what to do if broadcast fails?
					$result = common_real_broadcast($notice, $this->is_remote($notice));
					if (!$result) {
						$this->log(LOG_WARNING, 'Failed broadcast for notice ID = ' . $notice->id);
						$orig = $qi;
						$qi->claimed = NULL;
						$qi->update($orig);
						$this->log(LOG_WARNING, 'Abandoned claim for notice ID = ' . $notice->id);
						continue;
					}
					$this->log(LOG_INFO, 'finished broadcasting notice ID = ' . $notice->id);
					$notice = NULL;
				} else {
					$this->log(LOG_WARNING, 'queue item for notice that does not exist');
				}
				$qi->delete();
			}
		} while ($qi);
	}

	function clear_old_claims() {
		$qi = new Queue_item();
		$qi->claimed = NULL;
		$qi->whereAdd('now() - claimed > '.CLAIM_TIMEOUT);
		$qi->update(DB_DATAOBJECT_WHEREADD_ONLY);
	}

	function is_remote($notice) {
		$user = User::staticGet($notice->profile_id);
		return !$user;
	}
}

$resource = ($argc > 1) ? $argv[1] : NULL;

$daemon = new XMPPDaemon($resource);

if ($daemon->connect()) {
	$daemon->set_status("Send me a message to post a notice");
	$daemon->handle();
}

?>