summaryrefslogtreecommitdiff
path: root/classes/Notice.php
blob: b85dccd23789345b339e36d23f6248575d9139dd (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
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
<?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/>.
 */

if (!defined('LACONICA')) { exit(1); }

/**
 * Table Definition for notice
 */
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';

/* We keep the first three 20-notice pages, plus one for pagination check,
 * in the memcached cache. */

define('NOTICE_CACHE_WINDOW', 61);

class Notice extends Memcached_DataObject
{
    ###START_AUTOCODE
    /* the code below is auto generated do not remove the above tag */

    public $__table = 'notice';                          // table name
    public $id;                              // int(4)  primary_key not_null
    public $profile_id;                      // int(4)   not_null
    public $uri;                             // varchar(255)  unique_key
    public $content;                         // varchar(140)
    public $rendered;                        // text()
    public $url;                             // varchar(255)
    public $created;                         // datetime()   not_null
    public $modified;                        // timestamp()   not_null default_CURRENT_TIMESTAMP
    public $reply_to;                        // int(4)
    public $is_local;                        // tinyint(1)
    public $source;                          // varchar(32)

    /* Static get */
    function staticGet($k,$v=NULL) { return Memcached_DataObject::staticGet('Notice',$k,$v); }

    /* the code above is auto generated do not remove the tag below */
    ###END_AUTOCODE

	function getProfile() {
		return Profile::staticGet('id', $this->profile_id);
	}

	function delete() {
		$this->blowCaches(true);
		$this->blowFavesCache(true);
		$this->blowInboxes();
		parent::delete();
	}

	function saveTags() {
		/* extract all #hastags */
		$count = preg_match_all('/(?:^|\s)#([A-Za-z0-9_\-\.]{1,64})/', strtolower($this->content), $match);
		if (!$count) {
			return true;
		}

		/* elide characters we don't want in the tag */
		$match[1] = str_replace(array('-', '_', '.'), '', $match[1]);

		/* Add them to the database */
		foreach(array_unique($match[1]) as $hashtag) {
			$tag = DB_DataObject::factory('Notice_tag');
			$tag->notice_id = $this->id;
			$tag->tag = $hashtag;
			$tag->created = $this->created;
			$id = $tag->insert();
			if (!$id) {
				$last_error = PEAR::getStaticProperty('DB_DataObject','lastError');
				common_log(LOG_ERR, 'DB error inserting hashtag: ' . $last_error->message);
				common_server_error(sprintf(_('DB error inserting hashtag: %s'), $last_error->message));
				return;
			}
		}
		return true;
	}

	static function saveNew($profile_id, $content, $source=NULL, $is_local=1, $reply_to=NULL, $uri=NULL) {

        if (!Notice::checkEditThrottle($profile_id)) {
            common_log(LOG_WARNING, 'Excessive posting by profile #' . $profile_id . '; throttled.');
			return _('Too many notices too fast; take a breather and post again in a few minutes.');
        }

		$notice = new Notice();
		$notice->profile_id = $profile_id;

		$blacklist = common_config('public', 'blacklist');

		# Blacklisted are non-false, but not 1, either

		if ($blacklist && in_array($profile_id, $blacklist)) {
			$notice->is_local = -1;
		} else {
			$notice->is_local = $is_local;
		}

		$notice->reply_to = $reply_to;
		$notice->created = common_sql_now();
		$notice->content = $content;
		$notice->rendered = common_render_content($notice->content, $notice);
		$notice->source = $source;
		$notice->uri = $uri;

		$id = $notice->insert();

		if (!$id) {
			common_log_db_error($notice, 'INSERT', __FILE__);
			return _('Problem saving notice.');
		}

		# Update the URI after the notice is in the database
		if (!$uri) {
			$orig = clone($notice);
			$notice->uri = common_notice_uri($notice);

			if (!$notice->update($orig)) {
				common_log_db_error($notice, 'UPDATE', __FILE__);
				return _('Problem saving notice.');
			}
		}

		# XXX: do we need to change this for remote users?

		common_save_replies($notice);
		$notice->saveTags();

		# Clear the cache for subscribed users, so they'll update at next request
		# XXX: someone clever could prepend instead of clearing the cache

		if (common_config('memcached', 'enabled')) {
			$notice->blowCaches();
		}

		$notice->addToInboxes();
		return $notice;
	}

    static function checkEditThrottle($profile_id) {
        $profile = Profile::staticGet($profile_id);
        if (!$profile) {
            return false;
        }
        # Get the Nth notice
        $notice = $profile->getNotices(common_config('throttle', 'count') - 1, 1);
        if ($notice && $notice->fetch()) {
            # If the Nth notice was posted less than timespan seconds ago
            if (time() - strtotime($notice->created) <= common_config('throttle', 'timespan')) {
                # Then we throttle
                return false;
            }
        }
        # Either not N notices in the stream, OR the Nth was not posted within timespan seconds
        return true;
    }

	function blowCaches($blowLast=false) {
		$this->blowSubsCache($blowLast);
		$this->blowNoticeCache($blowLast);
		$this->blowRepliesCache($blowLast);
		$this->blowPublicCache($blowLast);
		$this->blowTagCache($blowLast);
	}

	function blowTagCache($blowLast=false) {
		$cache = common_memcache();
		if ($cache) {
			$tag = new Notice_tag();
			$tag->notice_id = $this->id;
			if ($tag->find()) {
				while ($tag->fetch()) {
					$cache->delete(common_cache_key('notice_tag:notice_stream:' . $tag->tag));
					if ($blowLast) {
						$cache->delete(common_cache_key('notice_tag:notice_stream:' . $tag->tag . ';last'));
					}
				}
			}
			$tag->free();
			unset($tag);
		}
	}

	function blowSubsCache($blowLast=false) {
		$cache = common_memcache();
		if ($cache) {
			$user = new User();

			$user->query('SELECT id ' .
						 'FROM user JOIN subscription ON user.id = subscription.subscriber ' .
						 'WHERE subscription.subscribed = ' . $this->profile_id);

			while ($user->fetch()) {
				$cache->delete(common_cache_key('user:notices_with_friends:' . $user->id));
				if ($blowLast) {
					$cache->delete(common_cache_key('user:notices_with_friends:' . $user->id . ';last'));
				}
			}
			$user->free();
			unset($user);
		}
	}

	function blowNoticeCache($blowLast=false) {
		if ($this->is_local) {
			$cache = common_memcache();
			if ($cache) {
				$cache->delete(common_cache_key('profile:notices:'.$this->profile_id));
				if ($blowLast) {
					$cache->delete(common_cache_key('profile:notices:'.$this->profile_id.';last'));
				}
			}
		}
	}

	function blowRepliesCache($blowLast=false) {
		$cache = common_memcache();
		if ($cache) {
			$reply = new Reply();
			$reply->notice_id = $this->id;
			if ($reply->find()) {
				while ($reply->fetch()) {
					$cache->delete(common_cache_key('user:replies:'.$reply->profile_id));
					if ($blowLast) {
						$cache->delete(common_cache_key('user:replies:'.$reply->profile_id.';last'));
					}
				}
			}
			$reply->free();
			unset($reply);
		}
	}

	function blowPublicCache($blowLast=false) {
		if ($this->is_local == 1) {
			$cache = common_memcache();
			if ($cache) {
				$cache->delete(common_cache_key('public'));
				if ($blowLast) {
					$cache->delete(common_cache_key('public').';last');
				}
			}
		}
	}

	function blowFavesCache($blowLast=false) {
		$cache = common_memcache();
		if ($cache) {
			$fave = new Fave();
			$fave->notice_id = $this->id;
			if ($fave->find()) {
				while ($fave->fetch()) {
					$cache->delete(common_cache_key('user:faves:'.$fave->user_id));
					if ($blowLast) {
						$cache->delete(common_cache_key('user:faves:'.$fave->user_id.';last'));
					}
				}
			}
			$fave->free();
			unset($fave);
		}
	}

	# XXX: too many args; we need to move to named params or even a separate
	# class for notice streams

	static function getStream($qry, $cachekey, $offset=0, $limit=20, $since_id=0, $before_id=0, $order=NULL) {

		if (common_config('memcached', 'enabled')) {

			# Skip the cache if this is a since_id or before_id qry
			if ($since_id > 0 || $before_id > 0) {
				return Notice::getStreamDirect($qry, $offset, $limit, $since_id, $before_id, $order);
			} else {
				return Notice::getCachedStream($qry, $cachekey, $offset, $limit, $order);
			}
		}

		return Notice::getStreamDirect($qry, $offset, $limit, $since_id, $before_id, $order);
	}

	static function getStreamDirect($qry, $offset, $limit, $since_id, $before_id, $order) {

		$needAnd = FALSE;
	  	$needWhere = TRUE;

		if (preg_match('/\bWHERE\b/i', $qry)) {
			$needWhere = FALSE;
			$needAnd = TRUE;
		}

		if ($since_id > 0) {

			if ($needWhere) {
		    	$qry .= ' WHERE ';
				$needWhere = FALSE;
			} else {
				$qry .= ' AND ';
			}

		    $qry .= ' notice.id > ' . $since_id;
		}

		if ($before_id > 0) {

			if ($needWhere) {
		    	$qry .= ' WHERE ';
				$needWhere = FALSE;
			} else {
				$qry .= ' AND ';
			}

			$qry .= ' notice.id < ' . $before_id;
		}

		# Allow ORDER override

		if ($order) {
			$qry .= $order;
		} else {
			$qry .= ' ORDER BY notice.created DESC, notice.id DESC ';
		}

		if (common_config('db','type') == 'pgsql') {
			$qry .= ' LIMIT ' . $limit . ' OFFSET ' . $offset;
		} else {
			$qry .= ' LIMIT ' . $offset . ', ' . $limit;
		}

		$notice = new Notice();

		$notice->query($qry);

		return $notice;
	}

	# XXX: this is pretty long and should probably be broken up into
	# some helper functions

	static function getCachedStream($qry, $cachekey, $offset, $limit, $order) {

		# If outside our cache window, just go to the DB

		if ($offset + $limit > NOTICE_CACHE_WINDOW) {
			return Notice::getStreamDirect($qry, $offset, $limit, NULL, NULL, $order);
		}

		# Get the cache; if we can't, just go to the DB

		$cache = common_memcache();

		if (!$cache) {
			return Notice::getStreamDirect($qry, $offset, $limit, NULL, NULL, $order);
		}

		# Get the notices out of the cache

		$notices = $cache->get(common_cache_key($cachekey));

		# On a cache hit, return a DB-object-like wrapper

		if ($notices !== FALSE) {
			$wrapper = new NoticeWrapper(array_slice($notices, $offset, $limit));
			return $wrapper;
		}

		# If the cache was invalidated because of new data being
		# added, we can try and just get the new stuff. We keep an additional
		# copy of the data at the key + ';last'

		# No cache hit. Try to get the *last* cached version

		$last_notices = $cache->get(common_cache_key($cachekey) . ';last');

		if ($last_notices) {

			# Reverse-chron order, so last ID is last.

			$last_id = $last_notices[0]->id;

			# XXX: this assumes monotonically increasing IDs; a fair
			# bet with our DB.

			$new_notice = Notice::getStreamDirect($qry, 0, NOTICE_CACHE_WINDOW,
												  $last_id, NULL, $order);

			if ($new_notice) {
				$new_notices = array();
				while ($new_notice->fetch()) {
					$new_notices[] = clone($new_notice);
				}
				$new_notice->free();
				$notices = array_slice(array_merge($new_notices, $last_notices),
									   0, NOTICE_CACHE_WINDOW);

				# Store the array in the cache for next time

				$result = $cache->set(common_cache_key($cachekey), $notices);
				$result = $cache->set(common_cache_key($cachekey) . ';last', $notices);

				# return a wrapper of the array for use now

				return new NoticeWrapper(array_slice($notices, $offset, $limit));
			}
		}

		# Otherwise, get the full cache window out of the DB

		$notice = Notice::getStreamDirect($qry, 0, NOTICE_CACHE_WINDOW, NULL, NULL, $order);

		# If there are no hits, just return the value

		if (!$notice) {
			return $notice;
		}

		# Pack results into an array

		$notices = array();

		while ($notice->fetch()) {
			$notices[] = clone($notice);
		}

		$notice->free();

		# Store the array in the cache for next time

		$result = $cache->set(common_cache_key($cachekey), $notices);
		$result = $cache->set(common_cache_key($cachekey) . ';last', $notices);

		# return a wrapper of the array for use now

		$wrapper = new NoticeWrapper(array_slice($notices, $offset, $limit));

		return $wrapper;
	}

	function publicStream($offset=0, $limit=20, $since_id=0, $before_id=0) {

		$parts = array();

		$qry = 'SELECT * FROM notice ';

		if (common_config('public', 'localonly')) {
			$parts[] = 'is_local = 1';
		} else {
			# -1 == blacklisted
			$parts[] = 'is_local != -1';
		}

		if ($parts) {
			$qry .= ' WHERE ' . implode(' AND ', $parts);
		}

		return Notice::getStream($qry,
								 'public',
								 $offset, $limit, $since_id, $before_id);
	}

	function addToInboxes() {
		$enabled = common_config('inboxes', 'enabled');

		if ($enabled === true || $enabled === 'transitional') {
			$inbox = new Notice_inbox();
			$qry = 'INSERT INTO notice_inbox (user_id, notice_id, created) ' .
			  'SELECT user.id, ' . $this->id . ', "' . $this->created . '" ' .
			  'FROM user JOIN subscription ON user.id = subscription.subscriber ' .
			  'WHERE subscription.subscribed = ' . $this->profile_id . ' ' .
			  'AND NOT EXISTS (SELECT user_id, notice_id ' .
			  'FROM notice_inbox ' .
			  'WHERE user_id = user.id ' .
			  'AND notice_id = ' . $this->id . ' )';
			if ($enabled === 'transitional') {
				$qry .= ' AND user.inboxed = 1';
			}
			$inbox->query($qry);
		}
		return;
	}

	# Delete from inboxes if we're deleted.

	function blowInboxes() {

		$enabled = common_config('inboxes', 'enabled');

		if ($enabled === true || $enabled === 'transitional') {
			$inbox = new Notice_inbox();
			$inbox->notice_id = $this->id;
			$inbox->delete();
		}

		return;
	}

}