summaryrefslogtreecommitdiff
path: root/web/lib/pkgbasefuncs.inc.php
blob: 3c199d668f97952f534ebe4485fca366f8bf008b (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
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
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
<?php

include_once("pkgreqfuncs.inc.php");

/**
 * Get the number of non-deleted comments for a specific package base
 *
 * @param string $base_id The package base ID to get comment count for
 * @param bool $include_deleted True if deleted comments should be included
 *
 * @return string The number of comments left for a specific package
 */
function pkgbase_comments_count($base_id, $include_deleted) {
	$base_id = intval($base_id);
	if (!$base_id) {
		return null;
	}

	$dbh = DB::connect();
	$q = "SELECT COUNT(*) FROM PackageComments ";
	$q.= "WHERE PackageBaseID = " . $base_id . " ";
	if (!$include_deleted) {
		$q.= "AND DelUsersID IS NULL";
	}
	$result = $dbh->query($q);
	if (!$result) {
		return null;
	}

	return $result->fetchColumn(0);
}

/**
 * Get all package comment information for a specific package base
 *
 * @param int $base_id The package base ID to get comments for
 * @param int $limit Maximum number of comments to return (0 means unlimited)
 * @param bool $include_deleted True if deleted comments should be included
 *
 * @return array All package comment information for a specific package base
 */
function pkgbase_comments($base_id, $limit, $include_deleted) {
	$base_id = intval($base_id);
	$limit = intval($limit);
	if (!$base_id) {
		return null;
	}

	$dbh = DB::connect();
	$q = "SELECT PackageComments.ID, A.UserName AS UserName, UsersID, Comments, ";
	$q.= "CommentTS, EditedTS, B.UserName AS EditUserName, ";
	$q.= "DelUsersID, C.UserName AS DelUserName FROM PackageComments ";
	$q.= "LEFT JOIN Users A ON PackageComments.UsersID = A.ID ";
	$q.= "LEFT JOIN Users B ON PackageComments.EditedUsersID = B.ID ";
	$q.= "LEFT JOIN Users C ON PackageComments.DelUsersID = C.ID ";
	$q.= "WHERE PackageBaseID = " . $base_id . " ";
	if (!$include_deleted) {
		$q.= "AND DelUsersID IS NULL ";
	}
	$q.= "ORDER BY CommentTS DESC";
	if ($limit > 0) {
		$q.=" LIMIT " . $limit;
	}
	$result = $dbh->query($q);
	if (!$result) {
		return null;
	}

	return $result->fetchAll();
}

/**
 * Add a comment to a package page and send out appropriate notifications
 *
 * @param string $base_id The package base ID to add the comment on
 * @param string $uid The user ID of the individual who left the comment
 * @param string $comment The comment left on a package page
 *
 * @return void
 */
function pkgbase_add_comment($base_id, $uid, $comment) {
	$dbh = DB::connect();

	if (trim($comment) == '') {
		return array(false, __('Comment cannot be empty.'));
	}

	$q = "INSERT INTO PackageComments ";
	$q.= "(PackageBaseID, UsersID, Comments, CommentTS) VALUES (";
	$q.= intval($base_id) . ", " . $uid . ", ";
	$q.= $dbh->quote($comment) . ", UNIX_TIMESTAMP())";
	$dbh->exec($q);

	notify(array('comment', $uid, $base_id), $comment);

	return array(true, __('Comment has been added.'));
}

/**
 * Get a list of all packages a logged-in user has voted for
 *
 * @param string $sid The session ID of the visitor
 *
 * @return array All packages the visitor has voted for
 */
function pkgbase_votes_from_sid($sid="") {
	$pkgs = array();
	if (!$sid) {return $pkgs;}
	$dbh = DB::connect();
	$q = "SELECT PackageBaseID ";
	$q.= "FROM PackageVotes, Users, Sessions ";
	$q.= "WHERE Users.ID = Sessions.UsersID ";
	$q.= "AND Users.ID = PackageVotes.UsersID ";
	$q.= "AND Sessions.SessionID = " . $dbh->quote($sid);
	$result = $dbh->query($q);
	if ($result) {
		while ($row = $result->fetch(PDO::FETCH_NUM)) {
			$pkgs[$row[0]] = 1;
		}
	}
	return $pkgs;
}

/**
 * Get the package base details
 *
 * @param string $id The package base ID to get description for
 *
 * @return array The package base's details OR error message
 **/
function pkgbase_get_details($base_id) {
	$dbh = DB::connect();

	$q = "SELECT PackageBases.ID, PackageBases.Name, ";
	$q.= "PackageBases.NumVotes, PackageBases.Popularity, ";
	$q.= "PackageBases.OutOfDateTS, PackageBases.SubmittedTS, ";
	$q.= "PackageBases.ModifiedTS, PackageBases.SubmitterUID, ";
	$q.= "PackageBases.MaintainerUID, PackageBases.PackagerUID, ";
	$q.= "PackageBases.FlaggerUID, ";
	$q.= "(SELECT COUNT(*) FROM PackageRequests ";
	$q.= " WHERE PackageRequests.PackageBaseID = PackageBases.ID ";
	$q.= " AND PackageRequests.Status = 0) AS RequestCount ";
	$q.= "FROM PackageBases ";
	$q.= "WHERE PackageBases.ID = " . intval($base_id);
	$result = $dbh->query($q);

	$row = array();

	if (!$result) {
		$row['error'] = __("Error retrieving package details.");
	}
	else {
		$row = $result->fetch(PDO::FETCH_ASSOC);
		if (empty($row)) {
			$row['error'] = __("Package details could not be found.");
		}
	}

	return $row;
}

/**
 * Display the package base details page
 *
 * @param string $id The package base ID to get details page for
 * @param array $row Package base details retrieved by pkgbase_get_details()
 * @param string $SID The session ID of the visitor
 *
 * @return void
 */
function pkgbase_display_details($base_id, $row, $SID="") {
	$dbh = DB::connect();

	if (isset($row['error'])) {
		print "<p>" . $row['error'] . "</p>\n";
	}
	else {
		$pkgbase_name = pkgbase_name_from_id($base_id);

		include('pkgbase_details.php');

		if ($SID) {
			include('pkg_comment_box.php');
		}

		$limit = isset($_GET['comments']) ? 0 : 10;
		$include_deleted = has_credential(CRED_COMMENT_VIEW_DELETED);
		$comments = pkgbase_comments($base_id, $limit, $include_deleted);
		if (!empty($comments)) {
			include('pkg_comments.php');
		}
	}
}

/**
 * Convert a list of package IDs into a list of corresponding package bases.
 *
 * @param array|int $ids Array of package IDs to convert
 *
 * @return array|int List of package base IDs
 */
function pkgbase_from_pkgid($ids) {
	$dbh = DB::connect();

	if (is_array($ids)) {
		$q = "SELECT PackageBaseID FROM Packages ";
		$q.= "WHERE ID IN (" . implode(",", $ids) . ")";
		$result = $dbh->query($q);
		return $result->fetchAll(PDO::FETCH_COLUMN, 0);
	} else {
		$q = "SELECT PackageBaseID FROM Packages ";
		$q.= "WHERE ID = " . $ids;
		$result = $dbh->query($q);
		return $result->fetch(PDO::FETCH_COLUMN, 0);
	}
}

/**
 * Retrieve ID of a package base by name
 *
 * @param string $name The package base name to retrieve the ID for
 *
 * @return int The ID of the package base
 */
function pkgbase_from_name($name) {
	$dbh = DB::connect();
	$q = "SELECT ID FROM PackageBases WHERE Name = " . $dbh->quote($name);
	$result = $dbh->query($q);
	return $result->fetch(PDO::FETCH_COLUMN, 0);
}

/**
 * Retrieve the name of a package base given its ID
 *
 * @param int $base_id The ID of the package base to query
 *
 * @return string The name of the package base
 */
function pkgbase_name_from_id($base_id) {
	$dbh = DB::connect();
	$q = "SELECT Name FROM PackageBases WHERE ID = " . intval($base_id);
	$result = $dbh->query($q);
	return $result->fetch(PDO::FETCH_COLUMN, 0);
}

/**
 * Get the names of all packages belonging to a package base
 *
 * @param int $base_id The ID of the package base
 *
 * @return array The names of all packages belonging to the package base
 */
function pkgbase_get_pkgnames($base_id) {
	$dbh = DB::connect();
	$q = "SELECT Name FROM Packages WHERE PackageBaseID = " . intval($base_id);
	$result = $dbh->query($q);
	return $result->fetchAll(PDO::FETCH_COLUMN, 0);
}

/**
 * Delete all packages belonging to a package base
 *
 * @param int $base_id The ID of the package base
 *
 * @return void
 */
function pkgbase_delete_packages($base_id) {
	$dbh = DB::connect();
	$q = "DELETE FROM Packages WHERE PackageBaseID = " . intval($base_id);
	$dbh->exec($q);
}

/**
 * Retrieve the maintainer of a package base given its ID
 *
 * @param int $base_id The ID of the package base to query
 *
 * @return int The user ID of the current package maintainer
 */
function pkgbase_maintainer_uid($base_id) {
	$dbh = DB::connect();
	$q = "SELECT MaintainerUID FROM PackageBases WHERE ID = " . intval($base_id);
	$result = $dbh->query($q);
	return $result->fetch(PDO::FETCH_COLUMN, 0);
}

/**
 * Retrieve the maintainers of an array of package bases given by their ID
 *
 * @param int $base_ids The array of IDs of the package bases to query
 *
 * @return int The user ID of the current package maintainer
 */
function pkgbase_maintainer_uids($base_ids) {
	$dbh = DB::connect();
	$q = "SELECT MaintainerUID FROM PackageBases WHERE ID IN (" . implode(",", $base_ids) . ")";
	$result = $dbh->query($q);
	return $result->fetchAll(PDO::FETCH_COLUMN, 0);
}

/**
 * Flag package(s) as out-of-date
 *
 * @param array $base_ids Array of package base IDs to flag/unflag
 * @param string $comment The comment to add
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_flag($base_ids, $comment) {
	if (!has_credential(CRED_PKGBASE_FLAG)) {
		return array(false, __("You must be logged in before you can flag packages."));
	}

	$base_ids = sanitize_ids($base_ids);
	if (empty($base_ids)) {
		return array(false, __("You did not select any packages to flag."));
	}

	if (strlen($comment) < 3) {
		return array(false, __("The selected packages have not been flagged, please enter a comment."));
	}

	$uid = uid_from_sid($_COOKIE['AURSID']);
	$dbh = DB::connect();

	$q = "UPDATE PackageBases SET ";
	$q.= "OutOfDateTS = UNIX_TIMESTAMP(), FlaggerUID = " . $uid . ", ";
	$q.= "FlaggerComment = " . $dbh->quote($comment) . " ";
	$q.= "WHERE ID IN (" . implode(",", $base_ids) . ") ";
	$q.= "AND OutOfDateTS IS NULL";
	$dbh->exec($q);

	foreach ($base_ids as $base_id) {
		notify(array('flag', $uid, $base_id), $comment);
	}

	return array(true, __("The selected packages have been flagged out-of-date."));
}

/**
 * Unflag package(s) as out-of-date
 *
 * @param array $base_ids Array of package base IDs to flag/unflag
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_unflag($base_ids) {
	$uid = uid_from_sid($_COOKIE["AURSID"]);
	if (!$uid) {
		return array(false, __("You must be logged in before you can unflag packages."));
	}

	$base_ids = sanitize_ids($base_ids);
	if (empty($base_ids)) {
		return array(false, __("You did not select any packages to unflag."));
	}

	$dbh = DB::connect();

	$q = "UPDATE PackageBases SET ";
	$q.= "OutOfDateTS = NULL ";
	$q.= "WHERE ID IN (" . implode(",", $base_ids) . ") ";

	$maintainers = array_merge(pkgbase_maintainer_uids($base_ids), pkgbase_get_comaintainer_uids($base_ids));
	if (!has_credential(CRED_PKGBASE_UNFLAG, $maintainers)) {
		$q.= "AND (MaintainerUID = " . $uid . " OR FlaggerUID = " . $uid. ")";
	}

	$result = $dbh->exec($q);

	if ($result) {
		return array(true, __("The selected packages have been unflagged."));
	}
}

/**
 * Delete package bases
 *
 * @param array $base_ids Array of package base IDs to delete
 * @param int $merge_base_id Package base to merge the deleted ones into
 * @param int $via Package request to close upon deletion
 * @param bool $grant Allow anyone to delete the package base
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_delete ($base_ids, $merge_base_id, $via, $grant=false) {
	if (!$grant && !has_credential(CRED_PKGBASE_DELETE)) {
		return array(false, __("You do not have permission to delete packages."));
	}

	$base_ids = sanitize_ids($base_ids);
	if (empty($base_ids)) {
		return array(false, __("You did not select any packages to delete."));
	}

	$dbh = DB::connect();

	if ($merge_base_id) {
		$merge_base_name = pkgbase_name_from_id($merge_base_id);
	}

	$uid = uid_from_sid($_COOKIE['AURSID']);
	foreach ($base_ids as $base_id) {
		if ($merge_base_id) {
			notify(array('delete', $uid, $base_id, $merge_base_id));
		} else {
			notify(array('delete', $uid, $base_id));
		}
	}

	/*
	 * Close package request if the deletion was initiated through the
	 * request interface. NOTE: This needs to happen *before* the actual
	 * deletion. Otherwise, the former maintainer will not be included in
	 * the Cc list of the request notification email.
	 */
	if ($via) {
		pkgreq_close(intval($via), 'accepted', '');
	}

	/* Scan through pending deletion requests and close them. */
	if (!$action) {
		$username = username_from_sid($_COOKIE['AURSID']);
		foreach ($base_ids as $base_id) {
			$pkgreq_ids = array_merge(pkgreq_by_pkgbase($base_id));
			foreach ($pkgreq_ids as $pkgreq_id) {
				pkgreq_close(intval($pkgreq_id), 'accepted',
					'The user ' .  $username .
					' deleted the package.', true);
			}
		}
	}

	if ($merge_base_id) {
		/* Merge comments */
		$q = "UPDATE PackageComments ";
		$q.= "SET PackageBaseID = " . intval($merge_base_id) . " ";
		$q.= "WHERE PackageBaseID IN (" . implode(",", $base_ids) . ")";
		$dbh->exec($q);

		/* Merge notifications */
		$q = "SELECT DISTINCT UserID FROM CommentNotify cn ";
		$q.= "WHERE PackageBaseID IN (" . implode(",", $base_ids) . ") ";
		$q.= "AND NOT EXISTS (SELECT * FROM CommentNotify cn2 ";
		$q.= "WHERE cn2.PackageBaseID = " . intval($merge_base_id) . " ";
		$q.= "AND cn2.UserID = cn.UserID)";
		$result = $dbh->query($q);

		while ($notify_uid = $result->fetch(PDO::FETCH_COLUMN, 0)) {
			$q = "INSERT INTO CommentNotify (UserID, PackageBaseID) ";
			$q.= "VALUES (" . intval($notify_uid) . ", " . intval($merge_base_id) . ")";
			$dbh->exec($q);
		}

		/* Merge votes */
		foreach ($base_ids as $base_id) {
			$q = "UPDATE PackageVotes ";
			$q.= "SET PackageBaseID = " . intval($merge_base_id) . " ";
			$q.= "WHERE PackageBaseID = " . $base_id . " ";
			$q.= "AND UsersID NOT IN (";
			$q.= "SELECT * FROM (SELECT UsersID ";
			$q.= "FROM PackageVotes ";
			$q.= "WHERE PackageBaseID = " . intval($merge_base_id);
			$q.= ") temp)";
			$dbh->exec($q);
		}

		$q = "UPDATE PackageBases ";
		$q.= "SET NumVotes = (SELECT COUNT(*) FROM PackageVotes ";
		$q.= "WHERE PackageBaseID = " . intval($merge_base_id) . ") ";
		$q.= "WHERE ID = " . intval($merge_base_id);
		$dbh->exec($q);
	}

	$q = "DELETE FROM Packages WHERE PackageBaseID IN (" . implode(",", $base_ids) . ")";
	$dbh->exec($q);

	$q = "DELETE FROM PackageBases WHERE ID IN (" . implode(",", $base_ids) . ")";
	$dbh->exec($q);

	return array(true, __("The selected packages have been deleted."));
}

/**
 * Adopt or disown packages
 *
 * @param array $base_ids Array of package base IDs to adopt/disown
 * @param bool $action Adopts if true, disowns if false. Adopts by default
 * @param int $via Package request to close upon adoption
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_adopt ($base_ids, $action=true, $via) {
	$dbh = DB::connect();

	$uid = uid_from_sid($_COOKIE["AURSID"]);
	if (!$uid) {
		if ($action) {
			return array(false, __("You must be logged in before you can adopt packages."));
		} else {
			return array(false, __("You must be logged in before you can disown packages."));
		}
	}

	/* Verify package ownership. */
	$base_ids = sanitize_ids($base_ids);

	$q = "SELECT ID FROM PackageBases ";
	$q.= "WHERE ID IN (" . implode(",", $base_ids) . ") ";

	if ($action && !has_credential(CRED_PKGBASE_ADOPT)) {
		/* Regular users may only adopt orphan packages. */
		$q.= "AND MaintainerUID IS NULL";
	}
	if (!$action && !has_credential(CRED_PKGBASE_DISOWN)) {
		/* Regular users may only disown their own packages. */
		$q.= "AND MaintainerUID = " . $uid;
	}

	$result = $dbh->query($q);
	$base_ids = $result->fetchAll(PDO::FETCH_COLUMN, 0);

	/* Error out if the list of remaining packages is empty. */
	if (empty($base_ids)) {
		if ($action) {
			return array(false, __("You did not select any packages to adopt."));
		} else {
			return array(false, __("You did not select any packages to disown."));
		}
	}

	/*
	 * Close package request if the disownment was initiated through the
	 * request interface. NOTE: This needs to happen *before* the actual
	 * disown operation. Otherwise, the former maintainer will not be
	 * included in the Cc list of the request notification email.
	 */
	if ($via) {
		pkgreq_close(intval($via), 'accepted', '');
	}

	/* Scan through pending orphan requests and close them. */
	if (!$action) {
		$username = username_from_sid($_COOKIE['AURSID']);
		foreach ($base_ids as $base_id) {
			$pkgreq_ids = pkgreq_by_pkgbase($base_id, 'orphan');
			foreach ($pkgreq_ids as $pkgreq_id) {
				pkgreq_close(intval($pkgreq_id), 'accepted',
					'The user ' .  $username .
					' disowned the package.', true);
			}
		}
	}

	/* Adopt or disown the package. */
	if ($action) {
		$q = "UPDATE PackageBases ";
		$q.= "SET MaintainerUID = $uid ";
		$q.= "WHERE ID IN (" . implode(",", $base_ids) . ") ";
		$dbh->exec($q);
	} else {
		/* Update the co-maintainer list when disowning a package. */
		if (has_credential(CRED_PKGBASE_DISOWN)) {
			foreach ($base_ids as $base_id) {
				pkgbase_set_comaintainers($base_id, array());
			}

			$q = "UPDATE PackageBases ";
			$q.= "SET MaintainerUID = NULL ";
			$q.= "WHERE ID IN (" . implode(",", $base_ids) . ") ";
			$dbh->exec($q);
		} else {
			foreach ($base_ids as $base_id) {
				$comaintainers = pkgbase_get_comaintainers($base_id);

				if (count($comaintainers) > 0) {
					$uid = uid_from_username($comaintainers[0]);
					$comaintainers = array_diff($comaintainers, array($comaintainers[0]));
					pkgbase_set_comaintainers($base_id, $comaintainers);
				} else {
					$uid = "NULL";
				}

				$q = "UPDATE PackageBases ";
				$q.= "SET MaintainerUID = " . $uid .  " ";
				$q.= "WHERE ID = " . $base_id;
				$dbh->exec($q);
			}
		}
	}

	if ($action) {
		pkgbase_notify($base_ids);
		return array(true, __("The selected packages have been adopted."));
	} else {
		return array(true, __("The selected packages have been disowned."));
	}
}

/**
 * Vote and un-vote for packages
 *
 * @param array $base_ids Array of package base IDs to vote/un-vote
 * @param bool $action Votes if true, un-votes if false. Votes by default
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_vote ($base_ids, $action=true) {
	if (!has_credential(CRED_PKGBASE_VOTE)) {
		if ($action) {
			return array(false, __("You must be logged in before you can vote for packages."));
		} else {
			return array(false, __("You must be logged in before you can un-vote for packages."));
		}
	}

	$base_ids = sanitize_ids($base_ids);
	if (empty($base_ids)) {
		if ($action) {
			return array(false, __("You did not select any packages to vote for."));
		} else {
			return array(false, __("Your votes have been removed from the selected packages."));
		}
	}

	$dbh = DB::connect();
	$my_votes = pkgbase_votes_from_sid($_COOKIE["AURSID"]);
	$uid = uid_from_sid($_COOKIE["AURSID"]);

	$first = 1;
	foreach ($base_ids as $pid) {
		if ($action) {
			$check = !isset($my_votes[$pid]);
		} else {
			$check = isset($my_votes[$pid]);
		}

		if ($check) {
			if ($first) {
				$first = 0;
				$vote_ids = $pid;
				if ($action) {
					$vote_clauses = "($uid, $pid, UNIX_TIMESTAMP())";
				}
			} else {
				$vote_ids .= ", $pid";
				if ($action) {
					$vote_clauses .= ", ($uid, $pid, UNIX_TIMESTAMP())";
				}
			}
		}
	}

	/* Only add votes for packages the user hasn't already voted for. */
	$op = $action ? "+" : "-";
	$q = "UPDATE PackageBases SET NumVotes = NumVotes $op 1 ";
	$q.= "WHERE ID IN ($vote_ids)";

	$dbh->exec($q);

	if ($action) {
		$q = "INSERT INTO PackageVotes (UsersID, PackageBaseID, VoteTS) VALUES ";
		$q.= $vote_clauses;
	} else {
		$q = "DELETE FROM PackageVotes WHERE UsersID = $uid ";
		$q.= "AND PackageBaseID IN ($vote_ids)";
	}

	$dbh->exec($q);

	if ($action) {
		return array(true, __("Your votes have been cast for the selected packages."));
	} else {
		return array(true, __("Your votes have been removed from the selected packages."));
	}
}

/**
 * Get all usernames and IDs that voted for a specific package base
 *
 * @param string $pkgbase_name The package base to retrieve votes for
 *
 * @return array User IDs and usernames that voted for a specific package base
 */
function pkgbase_votes_from_name($pkgbase_name) {
	$dbh = DB::connect();

	$q = "SELECT UsersID, Username, Name, VoteTS FROM PackageVotes ";
	$q.= "LEFT JOIN Users ON UsersID = Users.ID ";
	$q.= "LEFT JOIN PackageBases ";
	$q.= "ON PackageVotes.PackageBaseID = PackageBases.ID ";
	$q.= "WHERE PackageBases.Name = ". $dbh->quote($pkgbase_name) . " ";
	$q.= "ORDER BY Username";
	$result = $dbh->query($q);

	if (!$result) {
		return;
	}

	$votes = array();
	while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
		$votes[] = $row;
	}

	return $votes;
}

/**
 * Determine if a user has already voted for a specific package base
 *
 * @param string $uid The user ID to check for an existing vote
 * @param string $base_id The package base ID to check for an existing vote
 *
 * @return bool True if the user has already voted, otherwise false
 */
function pkgbase_user_voted($uid, $base_id) {
	$dbh = DB::connect();
	$q = "SELECT COUNT(*) FROM PackageVotes WHERE ";
	$q.= "UsersID = ". $dbh->quote($uid) . " AND ";
	$q.= "PackageBaseID = " . $dbh->quote($base_id);
	$result = $dbh->query($q);
	if (!$result) {
		return null;
	}

	return ($result->fetch(PDO::FETCH_COLUMN, 0) > 0);
}

/**
 * Determine if a user wants notifications for a specific package base
 *
 * @param string $uid User ID to check in the database
 * @param string $base_id Package base ID to check notifications for
 *
 * @return bool True if the user wants notifications, otherwise false
 */
function pkgbase_user_notify($uid, $base_id) {
	$dbh = DB::connect();

	$q = "SELECT * FROM CommentNotify WHERE UserID = " . $dbh->quote($uid);
	$q.= " AND PackageBaseID = " . $dbh->quote($base_id);
	$result = $dbh->query($q);

	if ($result->fetch(PDO::FETCH_NUM)) {
		return true;
	}
	else {
		return false;
	}
}

/**
 * Toggle notification of packages
 *
 * @param array $base_ids Array of package base IDs to toggle
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_notify ($base_ids, $action=true) {
	if (!has_credential(CRED_PKGBASE_NOTIFY)) {
		return;
	}

	$base_ids = sanitize_ids($base_ids);
	if (empty($base_ids)) {
		return array(false, __("Couldn't add to notification list."));
	}

	$dbh = DB::connect();
	$uid = uid_from_sid($_COOKIE["AURSID"]);

	$output = "";

	$first = true;

	/*
	 * There currently shouldn't be multiple requests here, but the format
	 * in which it's sent requires this.
	 */
	foreach ($base_ids as $bid) {
		$q = "SELECT Name FROM PackageBases WHERE ID = $bid";
		$result = $dbh->query($q);
		if ($result) {
			$row = $result->fetch(PDO::FETCH_NUM);
			$basename = $row[0];
		}
		else {
			$basename = '';
		}

		if ($first)
			$first = false;
		else
			$output .= ", ";


		if ($action) {
			$q = "SELECT COUNT(*) FROM CommentNotify WHERE ";
			$q .= "UserID = $uid AND PackageBaseID = $bid";

			/* Notification already added. Don't add again. */
			$result = $dbh->query($q);
			if ($result->fetchColumn() == 0) {
				$q = "INSERT INTO CommentNotify (PackageBaseID, UserID) VALUES ($bid, $uid)";
				$dbh->exec($q);
			}

			$output .= $basename;
		}
		else {
			$q = "DELETE FROM CommentNotify WHERE PackageBaseID = $bid ";
			$q .= "AND UserID = $uid";
			$dbh->exec($q);

			$output .= $basename;
		}
	}

	if ($action) {
		$output = __("You have been added to the comment notification list for %s.", $output);
	}
	else {
		$output = __("You have been removed from the comment notification list for %s.", $output);
	}

	return array(true, $output);
}

/**
 * Delete a package comment
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_delete_comment() {
	$uid = uid_from_sid($_COOKIE["AURSID"]);
	if (!$uid) {
		return array(false, __("You must be logged in before you can edit package information."));
	}

	if (isset($_POST["comment_id"])) {
		$comment_id = $_POST["comment_id"];
	} else {
		return array(false, __("Missing comment ID."));
	}

	$dbh = DB::connect();
	if (can_delete_comment($comment_id)) {
		$q = "UPDATE PackageComments ";
		$q.= "SET DelUsersID = ".$uid.", ";
		$q.= "EditedTS = UNIX_TIMESTAMP() ";
		$q.= "WHERE ID = ".intval($comment_id);
		$dbh->exec($q);
		return array(true, __("Comment has been deleted."));
	} else {
		return array(false, __("You are not allowed to delete this comment."));
	}
}

/**
 * Edit a package comment
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_edit_comment($comment) {
	$uid = uid_from_sid($_COOKIE["AURSID"]);
	if (!$uid) {
		return array(false, __("You must be logged in before you can edit package information."));
	}

	if (isset($_POST["comment_id"])) {
		$comment_id = $_POST["comment_id"];
	} else {
		return array(false, __("Missing comment ID."));
	}

	if (trim($comment) == '') {
		return array(false, __('Comment cannot be empty.'));
	}

	$dbh = DB::connect();
	if (can_edit_comment($comment_id)) {
		$q = "UPDATE PackageComments ";
		$q.= "SET EditedUsersID = ".$uid.", ";
		$q.= "Comments = ".$dbh->quote($comment).", ";
		$q.= "EditedTS = UNIX_TIMESTAMP() ";
		$q.= "WHERE ID = ".intval($comment_id);
		$dbh->exec($q);
		return array(true, __("Comment has been edited."));
	} else {
		return array(false, __("You are not allowed to edit this comment."));
	}
}

/**
 * Get a list of package base keywords
 *
 * @param int $base_id The package base ID to retrieve the keywords for
 *
 * @return array An array of keywords
 */
function pkgbase_get_keywords($base_id) {
	$dbh = DB::connect();
	$q = "SELECT Keyword FROM PackageKeywords ";
	$q .= "WHERE PackageBaseID = " . intval($base_id) . " ";
	$q .= "ORDER BY Keyword ASC";
	$result = $dbh->query($q);

	if ($result) {
		return $result->fetchAll(PDO::FETCH_COLUMN, 0);
	} else {
		return array();
	}
}

/**
 * Update the list of keywords of a package base
 *
 * @param int $base_id The package base ID to update the keywords of
 * @param array $users Array of keywords
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_set_keywords($base_id, $keywords) {
	$base_id = intval($base_id);

	$maintainers = array_merge(array(pkgbase_maintainer_uid($base_id)), pkgbase_get_comaintainer_uids(array($base_id)));
	if (!has_credential(CRED_PKGBASE_SET_KEYWORDS, $maintainers)) {
		return array(false, __("You are not allowed to edit the keywords of this package base."));
	}

	/* Remove empty and duplicate user names. */
	$keywords = array_unique(array_filter(array_map('trim', $keywords)));

	$dbh = DB::connect();

	$q = sprintf("DELETE FROM PackageKeywords WHERE PackageBaseID = %d", $base_id);
	$dbh->exec($q);

	$i = 0;
	foreach ($keywords as $keyword) {
		$q = sprintf("INSERT INTO PackageKeywords (PackageBaseID, Keyword) VALUES (%d, %s)", $base_id, $dbh->quote($keyword));
		var_dump($q);
		$dbh->exec($q);

		$i++;
		if ($i >= 20) {
			break;
		}
	}

	return array(true, __("The package base keywords have been updated."));
}

/**
 * Get a list of package base co-maintainers
 *
 * @param int $base_id The package base ID to retrieve the co-maintainers for
 *
 * @return array An array of co-maintainer user names
 */
function pkgbase_get_comaintainers($base_id) {
	$dbh = DB::connect();
	$q = "SELECT UserName FROM PackageComaintainers ";
	$q .= "INNER JOIN Users ON Users.ID = PackageComaintainers.UsersID ";
	$q .= "WHERE PackageComaintainers.PackageBaseID = " . intval($base_id) . " ";
	$q .= "ORDER BY Priority ASC";
	$result = $dbh->query($q);

	if ($result) {
		return $result->fetchAll(PDO::FETCH_COLUMN, 0);
	} else {
		return array();
	}
}

/**
 * Get a list of package base co-maintainer IDs
 *
 * @param int $base_id The package base ID to retrieve the co-maintainers for
 *
 * @return array An array of co-maintainer user UDs
 */
function pkgbase_get_comaintainer_uids($base_ids) {
	$dbh = DB::connect();
	$q = "SELECT UsersID FROM PackageComaintainers ";
	$q .= "INNER JOIN Users ON Users.ID = PackageComaintainers.UsersID ";
	$q .= "WHERE PackageComaintainers.PackageBaseID IN (" . implode(",", $base_ids) . ") ";
	$q .= "ORDER BY Priority ASC";
	$result = $dbh->query($q);

	if ($result) {
		return $result->fetchAll(PDO::FETCH_COLUMN, 0);
	} else {
		return array();
	}
}

/**
 * Update the list of co-maintainers of a package base
 *
 * @param int $base_id The package base ID to update the co-maintainers of
 * @param array $users Array of co-maintainer user names
 *
 * @return array Tuple of success/failure indicator and error message
 */
function pkgbase_set_comaintainers($base_id, $users) {
	if (!has_credential(CRED_PKGBASE_EDIT_COMAINTAINERS, array(pkgbase_maintainer_uid($base_id)))) {
		return array(false, __("You are not allowed to manage co-maintainers of this package base."));
	}

	/* Remove empty and duplicate user names. */
	$users = array_unique(array_filter(array_map('trim', $users)));

	$dbh = DB::connect();

	$uids_new = array();
	foreach($users as $user) {
		$q = "SELECT ID FROM Users ";
		$q .= "WHERE UserName = " . $dbh->quote($user);
		$result = $dbh->query($q);
		$uid = $result->fetchColumn(0);

		if (!$uid) {
			return array(false, __("Invalid user name: %s", $user));
		}

		$uids_new[] = $uid;
	}

	$q = sprintf("SELECT UsersID FROM PackageComaintainers WHERE PackageBaseID = %d", $base_id);
	$result = $dbh->query($q);
	$uids_old = $result->fetchAll(PDO::FETCH_COLUMN, 0);

	$uids_add = array_diff($uids_new, $uids_old);
	$uids_rem = array_diff($uids_old, $uids_new);

	$i = 1;
	foreach ($uids_new as $uid) {
		if (in_array($uid, $uids_add)) {
			$q = sprintf("INSERT INTO PackageComaintainers (PackageBaseID, UsersID, Priority) VALUES (%d, %d, %d)", $base_id, $uid, $i);
			notify(array('comaintainer-add', $base_id, $uid));
		} else {
			$q = sprintf("UPDATE PackageComaintainers SET Priority = %d WHERE PackageBaseID = %d AND UsersID = %d", $i, $base_id, $uid);
		}

		$dbh->exec($q);
		$i++;
	}

	foreach ($uids_rem as $uid) {
		$q = sprintf("DELETE FROM PackageComaintainers WHERE PackageBaseID = %d AND UsersID = %d", $base_id, $uid);
		$dbh->exec($q);
		notify(array('comaintainer-remove', $base_id, $uid));
	}

	return array(true, __("The package base co-maintainers have been updated."));
}