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
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
|
<?php
/**
*
* @package search
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/
namespace phpbb\search;
/**
* fulltext_postgres
* Fulltext search for PostgreSQL
* @package search
*/
class fulltext_postgres extends \phpbb\search\base
{
/**
* Associative array holding index stats
* @var array
*/
protected $stats = array();
/**
* Holds the words entered by user, obtained by splitting the entered query on whitespace
* @var array
*/
protected $split_words = array();
/**
* True if PostgreSQL version supports tsearch
* @var boolean
*/
protected $tsearch_usable = false;
/**
* Stores the PostgreSQL version
* @var string
*/
protected $version;
/**
* Stores the tsearch query
* @var string
*/
protected $tsearch_query;
/**
* True if phrase search is supported.
* PostgreSQL fulltext currently doesn't support it
* @var boolean
*/
protected $phrase_search = false;
/**
* Config object
* @var \phpbb\config\config
*/
protected $config;
/**
* Database connection
* @var \phpbb\db\driver\driver
*/
protected $db;
/**
* User object
* @var \phpbb\user
*/
protected $user;
/**
* Contains tidied search query.
* Operators are prefixed in search query and common words excluded
* @var string
*/
protected $search_query;
/**
* Contains common words.
* Common words are words with length less/more than min/max length
* @var array
*/
protected $common_words = array();
/**
* Associative array stores the min and max word length to be searched
* @var array
*/
protected $word_length = array();
/**
* Constructor
* Creates a new \phpbb\search\fulltext_postgres, which is used as a search backend
*
* @param string|bool $error Any error that occurs is passed on through this reference variable otherwise false
*/
public function __construct(&$error, $phpbb_root_path, $phpEx, $auth, $config, $db, $user)
{
$this->config = $config;
$this->db = $db;
$this->user = $user;
$this->word_length = array('min' => $this->config['fulltext_postgres_min_word_len'], 'max' => $this->config['fulltext_postgres_max_word_len']);
if ($this->db->sql_layer == 'postgres')
{
$pgsql_version = explode(',', substr($this->db->sql_server_info(), 10));
$this->version = trim($pgsql_version[0]);
if (version_compare($this->version, '8.3', '>='))
{
$this->tsearch_usable = true;
}
}
/**
* Load the UTF tools
*/
if (!function_exists('utf8_strlen'))
{
include($phpbb_root_path . 'includes/utf/utf_tools.' . $phpEx);
}
$error = false;
}
/**
* Returns the name of this search backend to be displayed to administrators
*
* @return string Name
*/
public function get_name()
{
return 'PostgreSQL Fulltext';
}
/**
* Returns the search_query
*
* @return string search query
*/
public function get_search_query()
{
return $this->search_query;
}
/**
* Returns the common_words array
*
* @return array common words that are ignored by search backend
*/
public function get_common_words()
{
return $this->common_words;
}
/**
* Returns the word_length array
*
* @return array min and max word length for searching
*/
public function get_word_length()
{
return $this->word_length;
}
/**
* Returns if phrase search is supported or not
*
* @return bool
*/
public function supports_phrase_search()
{
return $this->phrase_search;
}
/**
* Checks for correct PostgreSQL version and stores min/max word length in the config
*
* @return string|bool Language key of the error/incompatiblity occurred
*/
public function init()
{
if ($this->db->sql_layer != 'postgres')
{
return $this->user->lang['FULLTEXT_POSTGRES_INCOMPATIBLE_DATABASE'];
}
if (!$this->tsearch_usable)
{
return $this->user->lang['FULLTEXT_POSTGRES_TS_NOT_USABLE'];
}
return false;
}
/**
* Splits keywords entered by a user into an array of words stored in $this->split_words
* Stores the tidied search query in $this->search_query
*
* @param string &$keywords Contains the keyword as entered by the user
* @param string $terms is either 'all' or 'any'
* @return bool false if no valid keywords were found and otherwise true
*/
public function split_keywords(&$keywords, $terms)
{
if ($terms == 'all')
{
$match = array('#\sand\s#iu', '#\sor\s#iu', '#\snot\s#iu', '#(^|\s)\+#', '#(^|\s)-#', '#(^|\s)\|#');
$replace = array(' +', ' |', ' -', ' +', ' -', ' |');
$keywords = preg_replace($match, $replace, $keywords);
}
// Filter out as above
$split_keywords = preg_replace("#[\"\n\r\t]+#", ' ', trim(htmlspecialchars_decode($keywords)));
// Split words
$split_keywords = preg_replace('#([^\p{L}\p{N}\'*"()])#u', '$1$1', str_replace('\'\'', '\' \'', trim($split_keywords)));
$matches = array();
preg_match_all('#(?:[^\p{L}\p{N}*"()]|^)([+\-|]?(?:[\p{L}\p{N}*"()]+\'?)*[\p{L}\p{N}*"()])(?:[^\p{L}\p{N}*"()]|$)#u', $split_keywords, $matches);
$this->split_words = $matches[1];
foreach ($this->split_words as $i => $word)
{
$clean_word = preg_replace('#^[+\-|"]#', '', $word);
// check word length
$clean_len = utf8_strlen(str_replace('*', '', $clean_word));
if (($clean_len < $this->config['fulltext_postgres_min_word_len']) || ($clean_len > $this->config['fulltext_postgres_max_word_len']))
{
$this->common_words[] = $word;
unset($this->split_words[$i]);
}
}
if ($terms == 'any')
{
$this->search_query = '';
$this->tsearch_query = '';
foreach ($this->split_words as $word)
{
if ((strpos($word, '+') === 0) || (strpos($word, '-') === 0) || (strpos($word, '|') === 0))
{
$word = substr($word, 1);
}
$this->search_query .= $word . ' ';
$this->tsearch_query .= '|' . $word . ' ';
}
}
else
{
$this->search_query = '';
$this->tsearch_query = '';
foreach ($this->split_words as $word)
{
if (strpos($word, '+') === 0)
{
$this->search_query .= $word . ' ';
$this->tsearch_query .= '&' . substr($word, 1) . ' ';
}
elseif (strpos($word, '-') === 0)
{
$this->search_query .= $word . ' ';
$this->tsearch_query .= '&!' . substr($word, 1) . ' ';
}
elseif (strpos($word, '|') === 0)
{
$this->search_query .= $word . ' ';
$this->tsearch_query .= '|' . substr($word, 1) . ' ';
}
else
{
$this->search_query .= '+' . $word . ' ';
$this->tsearch_query .= '&' . $word . ' ';
}
}
}
$this->tsearch_query = substr($this->tsearch_query, 1);
$this->search_query = utf8_htmlspecialchars($this->search_query);
if ($this->search_query)
{
$this->split_words = array_values($this->split_words);
sort($this->split_words);
return true;
}
return false;
}
/**
* Turns text into an array of words
* @param string $text contains post text/subject
*/
public function split_message($text)
{
// Split words
$text = preg_replace('#([^\p{L}\p{N}\'*])#u', '$1$1', str_replace('\'\'', '\' \'', trim($text)));
$matches = array();
preg_match_all('#(?:[^\p{L}\p{N}*]|^)([+\-|]?(?:[\p{L}\p{N}*]+\'?)*[\p{L}\p{N}*])(?:[^\p{L}\p{N}*]|$)#u', $text, $matches);
$text = $matches[1];
// remove too short or too long words
$text = array_values($text);
for ($i = 0, $n = sizeof($text); $i < $n; $i++)
{
$text[$i] = trim($text[$i]);
if (utf8_strlen($text[$i]) < $this->config['fulltext_postgres_min_word_len'] || utf8_strlen($text[$i]) > $this->config['fulltext_postgres_max_word_len'])
{
unset($text[$i]);
}
}
return array_values($text);
}
/**
* Performs a search on keywords depending on display specific params. You have to run split_keywords() first
*
* @param string $type contains either posts or topics depending on what should be searched for
* @param string $fields contains either titleonly (topic titles should be searched), msgonly (only message bodies should be searched), firstpost (only subject and body of the first post should be searched) or all (all post bodies and subjects should be searched)
* @param string $terms is either 'all' (use query as entered, words without prefix should default to "have to be in field") or 'any' (ignore search query parts and just return all posts that contain any of the specified words)
* @param array $sort_by_sql contains SQL code for the ORDER BY part of a query
* @param string $sort_key is the key of $sort_by_sql for the selected sorting
* @param string $sort_dir is either a or d representing ASC and DESC
* @param string $sort_days specifies the maximum amount of days a post may be old
* @param array $ex_fid_ary specifies an array of forum ids which should not be searched
* @param string $post_visibility specifies which types of posts the user can view in which forums
* @param int $topic_id is set to 0 or a topic id, if it is not 0 then only posts in this topic should be searched
* @param array $author_ary an array of author ids if the author should be ignored during the search the array is empty
* @param string $author_name specifies the author match, when ANONYMOUS is also a search-match
* @param array &$id_ary passed by reference, to be filled with ids for the page specified by $start and $per_page, should be ordered
* @param int $start indicates the first index of the page
* @param int $per_page number of ids each page is supposed to contain
* @return boolean|int total number of results
*/
public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $post_visibility, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
{
// No keywords? No posts
if (!$this->search_query)
{
return false;
}
// When search query contains queries like -foo
if (strpos($this->search_query, '+') === false)
{
return false;
}
// generate a search_key from all the options to identify the results
$search_key = md5(implode('#', array(
implode(', ', $this->split_words),
$type,
$fields,
$terms,
$sort_days,
$sort_key,
$topic_id,
implode(',', $ex_fid_ary),
$post_visibility,
implode(',', $author_ary)
)));
if ($start < 0)
{
$start = 0;
}
// try reading the results from cache
$result_count = 0;
if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
{
return $result_count;
}
$id_ary = array();
$join_topic = ($type == 'posts') ? false : true;
// Build sql strings for sorting
$sql_sort = $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');
$sql_sort_table = $sql_sort_join = '';
switch ($sql_sort[0])
{
case 'u':
$sql_sort_table = USERS_TABLE . ' u, ';
$sql_sort_join = ($type == 'posts') ? ' AND u.user_id = p.poster_id ' : ' AND u.user_id = t.topic_poster ';
break;
case 't':
$join_topic = true;
break;
case 'f':
$sql_sort_table = FORUMS_TABLE . ' f, ';
$sql_sort_join = ' AND f.forum_id = p.forum_id ';
break;
}
// Build some display specific sql strings
switch ($fields)
{
case 'titleonly':
$sql_match = 'p.post_subject';
$sql_match_where = ' AND p.post_id = t.topic_first_post_id';
$join_topic = true;
break;
case 'msgonly':
$sql_match = 'p.post_text';
$sql_match_where = '';
break;
case 'firstpost':
$sql_match = 'p.post_subject, p.post_text';
$sql_match_where = ' AND p.post_id = t.topic_first_post_id';
$join_topic = true;
break;
default:
$sql_match = 'p.post_subject, p.post_text';
$sql_match_where = '';
break;
}
$sql_select = ($type == 'posts') ? 'p.post_id' : 'DISTINCT t.topic_id';
$sql_from = ($join_topic) ? TOPICS_TABLE . ' t, ' : '';
$field = ($type == 'posts') ? 'post_id' : 'topic_id';
$sql_author = (sizeof($author_ary) == 1) ? ' = ' . $author_ary[0] : 'IN (' . implode(', ', $author_ary) . ')';
if (sizeof($author_ary) && $author_name)
{
// first one matches post of registered users, second one guests and deleted users
$sql_author = '(' . $this->db->sql_in_set('p.poster_id', array_diff($author_ary, array(ANONYMOUS)), false, true) . ' OR p.post_username ' . $author_name . ')';
}
else if (sizeof($author_ary))
{
$sql_author = ' AND ' . $this->db->sql_in_set('p.poster_id', $author_ary);
}
else
{
$sql_author = '';
}
$sql_where_options = $sql_sort_join;
$sql_where_options .= ($topic_id) ? ' AND p.topic_id = ' . $topic_id : '';
$sql_where_options .= ($join_topic) ? ' AND t.topic_id = p.topic_id' : '';
$sql_where_options .= (sizeof($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
$sql_where_options .= ' AND ' . $post_visibility;
$sql_where_options .= $sql_author;
$sql_where_options .= ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
$sql_where_options .= $sql_match_where;
$tmp_sql_match = array();
foreach (explode(',', $sql_match) as $sql_match_column)
{
$tmp_sql_match[] = "to_tsvector ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', " . $sql_match_column . ") @@ to_tsquery ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', '" . $this->db->sql_escape($this->tsearch_query) . "')";
}
$this->db->sql_transaction('begin');
$sql_from = "FROM $sql_from$sql_sort_table" . POSTS_TABLE . " p";
$sql_where = "WHERE (" . implode(' OR ', $tmp_sql_match) . ")
$sql_where_options";
$sql = "SELECT $sql_select
$sql_from
$sql_where
ORDER BY $sql_sort";
$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
while ($row = $this->db->sql_fetchrow($result))
{
$id_ary[] = $row[$field];
}
$this->db->sql_freeresult($result);
$id_ary = array_unique($id_ary);
// if the total result count is not cached yet, retrieve it from the db
if (!$result_count)
{
$sql_count = "SELECT COUNT(*) as result_count
$sql_from
$sql_where";
$result = $this->db->sql_query($sql_count);
$result_count = (int) $this->db->sql_fetchfield('result_count');
$this->db->sql_freeresult($result);
if (!$result_count)
{
return false;
}
}
$this->db->sql_transaction('commit');
if ($start >= $result_count)
{
$start = floor(($result_count - 1) / $per_page) * $per_page;
$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
while ($row = $this->db->sql_fetchrow($result))
{
$id_ary[] = $row[$field];
}
$this->db->sql_freeresult($result);
$id_ary = array_unique($id_ary);
}
// store the ids, from start on then delete anything that isn't on the current page because we only need ids for one page
$this->save_ids($search_key, implode(' ', $this->split_words), $author_ary, $result_count, $id_ary, $start, $sort_dir);
$id_ary = array_slice($id_ary, 0, (int) $per_page);
return $result_count;
}
/**
* Performs a search on an author's posts without caring about message contents. Depends on display specific params
*
* @param string $type contains either posts or topics depending on what should be searched for
* @param boolean $firstpost_only if true, only topic starting posts will be considered
* @param array $sort_by_sql contains SQL code for the ORDER BY part of a query
* @param string $sort_key is the key of $sort_by_sql for the selected sorting
* @param string $sort_dir is either a or d representing ASC and DESC
* @param string $sort_days specifies the maximum amount of days a post may be old
* @param array $ex_fid_ary specifies an array of forum ids which should not be searched
* @param string $post_visibility specifies which types of posts the user can view in which forums
* @param int $topic_id is set to 0 or a topic id, if it is not 0 then only posts in this topic should be searched
* @param array $author_ary an array of author ids
* @param string $author_name specifies the author match, when ANONYMOUS is also a search-match
* @param array &$id_ary passed by reference, to be filled with ids for the page specified by $start and $per_page, should be ordered
* @param int $start indicates the first index of the page
* @param int $per_page number of ids each page is supposed to contain
* @return boolean|int total number of results
*/
public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $post_visibility, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
{
// No author? No posts
if (!sizeof($author_ary))
{
return 0;
}
// generate a search_key from all the options to identify the results
$search_key = md5(implode('#', array(
'',
$type,
($firstpost_only) ? 'firstpost' : '',
'',
'',
$sort_days,
$sort_key,
$topic_id,
implode(',', $ex_fid_ary),
$post_visibility,
implode(',', $author_ary),
$author_name,
)));
if ($start < 0)
{
$start = 0;
}
// try reading the results from cache
$result_count = 0;
if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
{
return $result_count;
}
$id_ary = array();
// Create some display specific sql strings
if ($author_name)
{
// first one matches post of registered users, second one guests and deleted users
$sql_author = '(' . $this->db->sql_in_set('p.poster_id', array_diff($author_ary, array(ANONYMOUS)), false, true) . ' OR p.post_username ' . $author_name . ')';
}
else
{
$sql_author = $this->db->sql_in_set('p.poster_id', $author_ary);
}
$sql_fora = (sizeof($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
$sql_topic_id = ($topic_id) ? ' AND p.topic_id = ' . (int) $topic_id : '';
$sql_time = ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
$sql_firstpost = ($firstpost_only) ? ' AND p.post_id = t.topic_first_post_id' : '';
// Build sql strings for sorting
$sql_sort = $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');
$sql_sort_table = $sql_sort_join = '';
switch ($sql_sort[0])
{
case 'u':
$sql_sort_table = USERS_TABLE . ' u, ';
$sql_sort_join = ($type == 'posts') ? ' AND u.user_id = p.poster_id ' : ' AND u.user_id = t.topic_poster ';
break;
case 't':
$sql_sort_table = ($type == 'posts' && !$firstpost_only) ? TOPICS_TABLE . ' t, ' : '';
$sql_sort_join = ($type == 'posts' && !$firstpost_only) ? ' AND t.topic_id = p.topic_id ' : '';
break;
case 'f':
$sql_sort_table = FORUMS_TABLE . ' f, ';
$sql_sort_join = ' AND f.forum_id = p.forum_id ';
break;
}
$m_approve_fid_sql = ' AND ' . $post_visibility;
// Build the query for really selecting the post_ids
if ($type == 'posts')
{
$sql = "SELECT p.post_id
FROM " . $sql_sort_table . POSTS_TABLE . ' p' . (($firstpost_only) ? ', ' . TOPICS_TABLE . ' t ' : ' ') . "
WHERE $sql_author
$sql_topic_id
$sql_firstpost
$m_approve_fid_sql
$sql_fora
$sql_sort_join
$sql_time
ORDER BY $sql_sort";
$field = 'post_id';
}
else
{
$sql = "SELECT t.topic_id
FROM " . $sql_sort_table . TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
WHERE $sql_author
$sql_topic_id
$sql_firstpost
$m_approve_fid_sql
$sql_fora
AND t.topic_id = p.topic_id
$sql_sort_join
$sql_time
GROUP BY t.topic_id, $sort_by_sql[$sort_key]
ORDER BY $sql_sort";
$field = 'topic_id';
}
$this->db->sql_transaction('begin');
// Only read one block of posts from the db and then cache it
$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
while ($row = $this->db->sql_fetchrow($result))
{
$id_ary[] = $row[$field];
}
$this->db->sql_freeresult($result);
// retrieve the total result count if needed
if (!$result_count)
{
if ($type == 'posts')
{
$sql_count = "SELECT COUNT(*) as result_count
FROM " . $sql_sort_table . POSTS_TABLE . ' p' . (($firstpost_only) ? ', ' . TOPICS_TABLE . ' t ' : ' ') . "
WHERE $sql_author
$sql_topic_id
$sql_firstpost
$m_approve_fid_sql
$sql_fora
$sql_sort_join
$sql_time";
}
else
{
$sql_count = "SELECT COUNT(*) as result_count
FROM " . $sql_sort_table . TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
WHERE $sql_author
$sql_topic_id
$sql_firstpost
$m_approve_fid_sql
$sql_fora
AND t.topic_id = p.topic_id
$sql_sort_join
$sql_time
GROUP BY t.topic_id, $sort_by_sql[$sort_key]";
}
$result = $this->db->sql_query($sql_count);
$result_count = (int) $this->db->sql_fetchfield('result_count');
if (!$result_count)
{
return false;
}
}
$this->db->sql_transaction('commit');
if ($start >= $result_count)
{
$start = floor(($result_count - 1) / $per_page) * $per_page;
$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
while ($row = $this->db->sql_fetchrow($result))
{
$id_ary[] = (int) $row[$field];
}
$this->db->sql_freeresult($result);
$id_ary = array_unique($id_ary);
}
if (sizeof($id_ary))
{
$this->save_ids($search_key, '', $author_ary, $result_count, $id_ary, $start, $sort_dir);
$id_ary = array_slice($id_ary, 0, $per_page);
return $result_count;
}
return false;
}
/**
* Destroys cached search results, that contained one of the new words in a post so the results won't be outdated
*
* @param string $mode contains the post mode: edit, post, reply, quote ...
* @param int $post_id contains the post id of the post to index
* @param string $message contains the post text of the post
* @param string $subject contains the subject of the post to index
* @param int $poster_id contains the user id of the poster
* @param int $forum_id contains the forum id of parent forum of the post
*/
public function index($mode, $post_id, &$message, &$subject, $poster_id, $forum_id)
{
// Split old and new post/subject to obtain array of words
$split_text = $this->split_message($message);
$split_title = ($subject) ? $this->split_message($subject) : array();
$words = array_unique(array_merge($split_text, $split_title));
unset($split_text);
unset($split_title);
// destroy cached search results containing any of the words removed or added
$this->destroy_cache($words, array($poster_id));
unset($words);
}
/**
* Destroy cached results, that might be outdated after deleting a post
*/
public function index_remove($post_ids, $author_ids, $forum_ids)
{
$this->destroy_cache(array(), $author_ids);
}
/**
* Destroy old cache entries
*/
public function tidy()
{
// destroy too old cached search results
$this->destroy_cache(array());
set_config('search_last_gc', time(), true);
}
/**
* Create fulltext index
*
* @return string|bool error string is returned incase of errors otherwise false
*/
public function create_index($acp_module, $u_action)
{
// Make sure we can actually use PostgreSQL with fulltext indexes
if ($error = $this->init())
{
return $error;
}
if (empty($this->stats))
{
$this->get_stats();
}
if (!isset($this->stats['post_subject']))
{
$this->db->sql_query("CREATE INDEX " . POSTS_TABLE . "_" . $this->config['fulltext_postgres_ts_name'] . "_post_subject ON " . POSTS_TABLE . " USING gin (to_tsvector ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', post_subject))");
}
if (!isset($this->stats['post_text']))
{
$this->db->sql_query("CREATE INDEX " . POSTS_TABLE . "_" . $this->config['fulltext_postgres_ts_name'] . "_post_text ON " . POSTS_TABLE . " USING gin (to_tsvector ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', post_text))");
}
$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE);
return false;
}
/**
* Drop fulltext index
*
* @return string|bool error string is returned incase of errors otherwise false
*/
public function delete_index($acp_module, $u_action)
{
// Make sure we can actually use PostgreSQL with fulltext indexes
if ($error = $this->init())
{
return $error;
}
if (empty($this->stats))
{
$this->get_stats();
}
if (isset($this->stats['post_subject']))
{
$this->db->sql_query('DROP INDEX ' . $this->stats['post_subject']['relname']);
}
if (isset($this->stats['post_text']))
{
$this->db->sql_query('DROP INDEX ' . $this->stats['post_text']['relname']);
}
$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE);
return false;
}
/**
* Returns true if both FULLTEXT indexes exist
*/
public function index_created()
{
if (empty($this->stats))
{
$this->get_stats();
}
return (isset($this->stats['post_text']) && isset($this->stats['post_subject'])) ? true : false;
}
/**
* Returns an associative array containing information about the indexes
*/
public function index_stats()
{
if (empty($this->stats))
{
$this->get_stats();
}
return array(
$this->user->lang['FULLTEXT_POSTGRES_TOTAL_POSTS'] => ($this->index_created()) ? $this->stats['total_posts'] : 0,
);
}
/**
* Computes the stats and store them in the $this->stats associative array
*/
protected function get_stats()
{
if ($this->db->sql_layer != 'postgres')
{
$this->stats = array();
return;
}
$sql = "SELECT c2.relname, pg_catalog.pg_get_indexdef(i.indexrelid, 0, true) AS indexdef
FROM pg_catalog.pg_class c1, pg_catalog.pg_index i, pg_catalog.pg_class c2
WHERE c1.relname = '" . POSTS_TABLE . "'
AND pg_catalog.pg_table_is_visible(c1.oid)
AND c1.oid = i.indrelid
AND i.indexrelid = c2.oid";
$result = $this->db->sql_query($sql);
while ($row = $this->db->sql_fetchrow($result))
{
// deal with older PostgreSQL versions which didn't use Index_type
if (strpos($row['indexdef'], 'to_tsvector') !== false)
{
if ($row['relname'] == POSTS_TABLE . '_' . $this->config['fulltext_postgres_ts_name'] . '_post_text' || $row['relname'] == POSTS_TABLE . '_post_text')
{
$this->stats['post_text'] = $row;
}
else if ($row['relname'] == POSTS_TABLE . '_' . $this->config['fulltext_postgres_ts_name'] . '_post_subject' || $row['relname'] == POSTS_TABLE . '_post_subject')
{
$this->stats['post_subject'] = $row;
}
}
}
$this->db->sql_freeresult($result);
$this->stats['total_posts'] = $this->config['num_posts'];
}
/**
* Display various options that can be configured for the backend from the acp
*
* @return associative array containing template and config variables
*/
public function acp()
{
$tpl = '
<dl>
<dt><label>' . $this->user->lang['FULLTEXT_POSTGRES_VERSION_CHECK'] . '</label><br /><span>' . $this->user->lang['FULLTEXT_POSTGRES_VERSION_CHECK_EXPLAIN'] . '</span></dt>
<dd>' . (($this->tsearch_usable) ? $this->user->lang['YES'] : $this->user->lang['NO']) . ' (PostgreSQL ' . $this->version . ')</dd>
</dl>
<dl>
<dt><label>' . $this->user->lang['FULLTEXT_POSTGRES_TS_NAME'] . '</label><br /><span>' . $this->user->lang['FULLTEXT_POSTGRES_TS_NAME_EXPLAIN'] . '</span></dt>
<dd><select name="config[fulltext_postgres_ts_name]">';
if ($this->db->sql_layer == 'postgres' && $this->tsearch_usable)
{
$sql = 'SELECT cfgname AS ts_name
FROM pg_ts_config';
$result = $this->db->sql_query($sql);
while ($row = $this->db->sql_fetchrow($result))
{
$tpl .= '<option value="' . $row['ts_name'] . '"' . ($row['ts_name'] === $this->config['fulltext_postgres_ts_name'] ? ' selected="selected"' : '') . '>' . $row['ts_name'] . '</option>';
}
$this->db->sql_freeresult($result);
}
else
{
$tpl .= '<option value="' . $this->config['fulltext_postgres_ts_name'] . '" selected="selected">' . $this->config['fulltext_postgres_ts_name'] . '</option>';
}
$tpl .= '</select></dd>
</dl>
<dl>
<dt><label for="fulltext_postgres_min_word_len">' . $this->user->lang['FULLTEXT_POSTGRES_MIN_WORD_LEN'] . $this->user->lang['COLON'] . '</label><br /><span>' . $this->user->lang['FULLTEXT_POSTGRES_MIN_WORD_LEN_EXPLAIN'] . '</span></dt>
<dd><input id="fulltext_postgres_min_word_len" type="number" size="3" maxlength="3" min="0" max="255" name="config[fulltext_postgres_min_word_len]" value="' . (int) $this->config['fulltext_postgres_min_word_len'] . '" /></dd>
</dl>
<dl>
<dt><label for="fulltext_postgres_max_word_len">' . $this->user->lang['FULLTEXT_POSTGRES_MAX_WORD_LEN'] . $this->user->lang['COLON'] . '</label><br /><span>' . $this->user->lang['FULLTEXT_POSTGRES_MAX_WORD_LEN_EXPLAIN'] . '</span></dt>
<dd><input id="fulltext_postgres_max_word_len" type="number" size="3" maxlength="3" min="0" max="255" name="config[fulltext_postgres_max_word_len]" value="' . (int) $this->config['fulltext_postgres_max_word_len'] . '" /></dd>
</dl>
';
// These are fields required in the config table
return array(
'tpl' => $tpl,
'config' => array('fulltext_postgres_ts_name' => 'string', 'fulltext_postgres_min_word_len' => 'integer:0:255', 'fulltext_postgres_max_word_len' => 'integer:0:255')
);
}
}
|
