aboutsummaryrefslogtreecommitdiffstats
path: root/Bugzilla/User.pm
blob: 9977ca86c691fc4ec03005241c7bf8ca1de2cd78 (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
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# The Initial Developer of the Original Code is Netscape Communications
# Corporation. Portions created by Netscape are
# Copyright (C) 1998 Netscape Communications Corporation. All
# Rights Reserved.
#
# Contributor(s): Myk Melez <myk@mozilla.org>
#                 Erik Stambaugh <erik@dasbistro.com>
#                 Bradley Baetz <bbaetz@acm.org>
#                 Joel Peshkin <bugreport@peshkin.net> 
#                 Byron Jones <bugzilla@glob.com.au>
#                 Shane H. W. Travis <travis@sedsystems.ca>
#                 Max Kanat-Alexander <mkanat@bugzilla.org>
#                 Gervase Markham <gerv@gerv.net>
#                 Lance Larsh <lance.larsh@oracle.com>
#                 Justin C. De Vries <judevries@novell.com>
#                 Dennis Melentyev <dennis.melentyev@infopulse.com.ua>
#                 Frédéric Buclin <LpSolit@gmail.com>

################################################################################
# Module Initialization
################################################################################

# Make it harder for us to do dangerous things in Perl.
use strict;

# This module implements utilities for dealing with Bugzilla users.
package Bugzilla::User;

use Bugzilla::Error;
use Bugzilla::Util;
use Bugzilla::Constants;
use Bugzilla::User::Setting;
use Bugzilla::Product;
use Bugzilla::Classification;
use Bugzilla::Field;

use base qw(Exporter);
@Bugzilla::User::EXPORT = qw(insert_new_user is_available_username
    login_to_id user_id_to_login validate_password
    UserInGroup
    USER_MATCH_MULTIPLE USER_MATCH_FAILED USER_MATCH_SUCCESS
    MATCH_SKIP_CONFIRM
);

#####################################################################
# Constants
#####################################################################

use constant USER_MATCH_MULTIPLE => -1;
use constant USER_MATCH_FAILED   => 0;
use constant USER_MATCH_SUCCESS  => 1;

use constant MATCH_SKIP_CONFIRM  => 1;

################################################################################
# Functions
################################################################################

sub new {
    my $invocant = shift;
    my $user_id = shift;

    if ($user_id) {
        my $uid = $user_id;
        detaint_natural($user_id)
          || ThrowCodeError('invalid_numeric_argument',
                            {argument => 'userID',
                             value    => $uid,
                             function => 'Bugzilla::User::new'});
        return $invocant->_create("userid=?", $user_id);
    }
    else {
        return $invocant->_create;
    }
}

# This routine is sort of evil. Nothing except the login stuff should
# be dealing with addresses as an input, and they can get the id as a
# side effect of the other sql they have to do anyway.
# Bugzilla::BugMail still does this, probably as a left over from the
# pre-id days. Provide this as a helper, but don't document it, and hope
# that it can go away.
# The request flag stuff also does this, but it really should be passing
# in the id it already had to validate (or the User.pm object, of course)
sub new_from_login {
    my $invocant = shift;
    my $login = shift;

    my $dbh = Bugzilla->dbh;
    return $invocant->_create($dbh->sql_istrcmp('login_name', '?'), $login);
}

# Internal helper for the above |new| methods
# $cond is a string (including a placeholder ?) for the search
# requirement for the profiles table
sub _create {
    my $invocant = shift;
    my $class = ref($invocant) || $invocant;

    my $cond = shift;
    my $val = shift;

    # Allow invocation with no parameters to create a blank object
    my $self = {
        'id'             => 0,
        'name'           => '',
        'login'          => '',
        'showmybugslink' => 0,
        'disabledtext'   => '',
        'flags'          => {},
    };
    bless ($self, $class);
    return $self unless $cond && $val;

    # We're checking for validity here, so any value is OK
    trick_taint($val);

    my $dbh = Bugzilla->dbh;

    my ($id, $login, $name, $disabledtext, $mybugslink) =
        $dbh->selectrow_array(qq{SELECT userid, login_name, realname,
                                        disabledtext, mybugslink
                                 FROM profiles WHERE $cond},
                                 undef, $val);

    return undef unless defined $id;

    $self->{'id'}             = $id;
    $self->{'name'}           = $name;
    $self->{'login'}          = $login;
    $self->{'disabledtext'}   = $disabledtext;
    $self->{'showmybugslink'} = $mybugslink;

    return $self;
}

# Accessors for user attributes
sub id { $_[0]->{id}; }
sub login { $_[0]->{login}; }
sub email { $_[0]->{login} . Bugzilla->params->{'emailsuffix'}; }
sub name { $_[0]->{name}; }
sub disabledtext { $_[0]->{'disabledtext'}; }
sub is_disabled { $_[0]->disabledtext ? 1 : 0; }
sub showmybugslink { $_[0]->{showmybugslink}; }

sub set_authorizer {
    my ($self, $authorizer) = @_;
    $self->{authorizer} = $authorizer;
}
sub authorizer {
    my ($self) = @_;
    if (!$self->{authorizer}) {
        require Bugzilla::Auth;
        $self->{authorizer} = new Bugzilla::Auth();
    }
    return $self->{authorizer};
}

# Generate a string to identify the user by name + login if the user
# has a name or by login only if she doesn't.
sub identity {
    my $self = shift;

    return "" unless $self->id;

    if (!defined $self->{identity}) {
        $self->{identity} = 
          $self->{name} ? "$self->{name} <$self->{login}>" : $self->{login};
    }

    return $self->{identity};
}

sub nick {
    my $self = shift;

    return "" unless $self->id;

    if (!defined $self->{nick}) {
        $self->{nick} = (split(/@/, $self->{login}, 2))[0];
    }

    return $self->{nick};
}

sub queries {
    my $self = shift;

    return $self->{queries} if defined $self->{queries};
    return [] unless $self->id;

    my $dbh = Bugzilla->dbh;
    my $used_in_whine_ref = $dbh->selectcol_arrayref(q{
                    SELECT DISTINCT query_name
                      FROM whine_events we
                INNER JOIN whine_queries wq
                        ON we.id = wq.eventid
                     WHERE we.owner_userid = ?}, undef, $self->{id});

    my $queries_ref = $dbh->selectall_arrayref(q{
                    SELECT name, query, linkinfooter, query_type
                      FROM namedqueries 
                     WHERE userid = ?
                  ORDER BY UPPER(name)},{'Slice'=>{}}, $self->{id});

    foreach my $name (@$used_in_whine_ref) { 
        foreach my $queries_hash (@$queries_ref) {
            if ($queries_hash->{name} eq $name) {
                $queries_hash->{usedinwhine} = 1;
                last;
            }
        }
    }
    $self->{queries} = $queries_ref;

    return $self->{queries};
}

sub settings {
    my ($self) = @_;

    return $self->{'settings'} if (defined $self->{'settings'});

    # IF the user is logged in
    # THEN get the user's settings
    # ELSE get default settings
    if ($self->id) {
        $self->{'settings'} = get_all_settings($self->id);
    } else {
        $self->{'settings'} = get_defaults();
    }

    return $self->{'settings'};
}

sub flush_queries_cache {
    my $self = shift;

    delete $self->{queries};
}

sub groups {
    my $self = shift;

    return $self->{groups} if defined $self->{groups};
    return {} unless $self->id;

    my $dbh = Bugzilla->dbh;
    my $groups = $dbh->selectcol_arrayref(q{SELECT DISTINCT groups.name, group_id
                                              FROM groups, user_group_map
                                             WHERE groups.id=user_group_map.group_id
                                               AND user_id=?
                                               AND isbless=0},
                                          { Columns=>[1,2] },
                                          $self->{id});

    # The above gives us an arrayref [name, id, name, id, ...]
    # Convert that into a hashref
    my %groups = @$groups;
    my @groupidstocheck = values(%groups);
    my %groupidschecked = ();
    my $rows = $dbh->selectall_arrayref(
                "SELECT DISTINCT groups.name, groups.id, member_id
                            FROM group_group_map
                      INNER JOIN groups
                              ON groups.id = grantor_id
                           WHERE grant_type = " . GROUP_MEMBERSHIP);
    my %group_names = ();
    my %group_membership = ();
    foreach my $row (@$rows) {
        my ($member_name, $grantor_id, $member_id) = @$row; 
        # Just save the group names
        $group_names{$grantor_id} = $member_name;
        
        # And group membership
        push (@{$group_membership{$member_id}}, $grantor_id);
    }
    
    # Let's walk the groups hierarchy tree (using FIFO)
    # On the first iteration it's pre-filled with direct groups 
    # membership. Later on, each group can add its own members into the
    # FIFO. Circular dependencies are eliminated by checking
    # $groupidschecked{$member_id} hash values.
    # As a result, %groups will have all the groups we are the member of.
    while ($#groupidstocheck >= 0) {
        # Pop the head group from FIFO
        my $member_id = shift @groupidstocheck;
        
        # Skip the group if we have already checked it
        if (!$groupidschecked{$member_id}) {
            # Mark group as checked
            $groupidschecked{$member_id} = 1;
            
            # Add all its members to the FIFO check list
            # %group_membership contains arrays of group members 
            # for all groups. Accessible by group number.
            foreach my $newgroupid (@{$group_membership{$member_id}}) {
                push @groupidstocheck, $newgroupid 
                    if (!$groupidschecked{$newgroupid});
            }
            # Note on if clause: we could have group in %groups from 1st
            # query and do not have it in second one
            $groups{$group_names{$member_id}} = $member_id 
                if $group_names{$member_id} && $member_id;
        }
    }
    $self->{groups} = \%groups;

    return $self->{groups};
}

sub groups_as_string {
    my $self = shift;
    return (join(',',values(%{$self->groups})) || '-1');
}

sub bless_groups {
    my $self = shift;

    return $self->{'bless_groups'} if defined $self->{'bless_groups'};
    return [] unless $self->id;

    my $dbh = Bugzilla->dbh;
    my $query;
    my $connector;
    my @bindValues;

    if ($self->in_group('editusers')) {
        # Users having editusers permissions may bless all groups.
        $query = 'SELECT DISTINCT id, name, description FROM groups';
        $connector = 'WHERE';
    }
    else {
        # Get all groups for the user where:
        #    + They have direct bless privileges
        #    + They are a member of a group that inherits bless privs.
        $query = q{
            SELECT DISTINCT groups.id, groups.name, groups.description
                       FROM groups, user_group_map, group_group_map AS ggm
                      WHERE user_group_map.user_id = ?
                        AND ((user_group_map.isbless = 1
                              AND groups.id=user_group_map.group_id)
                             OR (groups.id = ggm.grantor_id
                                 AND ggm.grant_type = ?
                                 AND ggm.member_id IN(} .
                                 $self->groups_as_string . 
                               q{)))};
        $connector = 'AND';
        @bindValues = ($self->id, GROUP_BLESS);
    }

    # If visibilitygroups are used, restrict the set of groups.
    if (!$self->in_group('editusers')
        && Bugzilla->params->{'usevisibilitygroups'}) 
    {
        # Users need to see a group in order to bless it.
        my $visibleGroups = join(', ', @{$self->visible_groups_direct()})
            || return $self->{'bless_groups'} = [];
        $query .= " $connector id in ($visibleGroups)";
    }

    $query .= ' ORDER BY name';

    return $self->{'bless_groups'} =
        $dbh->selectall_arrayref($query, {'Slice' => {}}, @bindValues);
}

sub in_group {
    my ($self, $group) = @_;
    return exists $self->groups->{$group} ? 1 : 0;
}

sub in_group_id {
    my ($self, $id) = @_;
    my %j = reverse(%{$self->groups});
    return exists $j{$id} ? 1 : 0;
}

sub can_see_user {
    my ($self, $otherUser) = @_;
    my $query;

    if (Bugzilla->params->{'usevisibilitygroups'}) {
        # If the user can see no groups, then no users are visible either.
        my $visibleGroups = $self->visible_groups_as_string() || return 0;
        $query = qq{SELECT COUNT(DISTINCT userid)
                    FROM profiles, user_group_map
                    WHERE userid = ?
                    AND user_id = userid
                    AND isbless = 0
                    AND group_id IN ($visibleGroups)
                   };
    } else {
        $query = qq{SELECT COUNT(userid)
                    FROM profiles
                    WHERE userid = ?
                   };
    }
    return Bugzilla->dbh->selectrow_array($query, undef, $otherUser->id);
}

sub can_edit_product {
    my ($self, $prod_id) = @_;
    my $dbh = Bugzilla->dbh;
    my $sth = $self->{sthCanEditProductId};
    my $userid = $self->{id};
    my $query = q{SELECT group_id FROM group_control_map 
                   WHERE product_id =? 
                     AND canedit != 0 };
    if (%{$self->groups}) {
        my $groups = join(',', values(%{$self->groups}));
        $query .= qq{AND group_id NOT IN($groups)};
    }
    unless ($sth) { $sth = $dbh->prepare($query); }
    $sth->execute($prod_id);
    $self->{sthCanEditProductId} = $sth;
    my $result = $sth->fetchrow_array();
    
    return (!defined($result));
}

sub can_see_bug {
    my ($self, $bugid) = @_;
    my $dbh = Bugzilla->dbh;
    my $sth  = $self->{sthCanSeeBug};
    my $userid  = $self->{id};
    # Get fields from bug, presence of user on cclist, and determine if
    # the user is missing any groups required by the bug. The prepared query
    # is cached because this may be called for every row in buglists or
    # every bug in a dependency list.
    unless ($sth) {
        $sth = $dbh->prepare("SELECT 1, reporter, assigned_to, qa_contact,
                             reporter_accessible, cclist_accessible,
                             COUNT(cc.who), COUNT(bug_group_map.bug_id)
                             FROM bugs
                             LEFT JOIN cc 
                               ON cc.bug_id = bugs.bug_id
                               AND cc.who = $userid
                             LEFT JOIN bug_group_map 
                               ON bugs.bug_id = bug_group_map.bug_id
                               AND bug_group_map.group_ID NOT IN(" .
                               $self->groups_as_string .
                               ") WHERE bugs.bug_id = ? 
                               AND creation_ts IS NOT NULL " .
                             $dbh->sql_group_by('bugs.bug_id', 'reporter, ' .
                             'assigned_to, qa_contact, reporter_accessible, ' .
                             'cclist_accessible'));
    }
    $sth->execute($bugid);
    my ($ready, $reporter, $owner, $qacontact, $reporter_access, $cclist_access,
        $isoncclist, $missinggroup) = $sth->fetchrow_array();
    $sth->finish;
    $self->{sthCanSeeBug} = $sth;
    return ($ready
            && ((($reporter == $userid) && $reporter_access)
                || (Bugzilla->params->{'useqacontact'} 
                    && $qacontact && ($qacontact == $userid))
                || ($owner == $userid)
                || ($isoncclist && $cclist_access)
                || (!$missinggroup)));
}

sub can_see_product {
    my ($self, $product_name) = @_;

    return scalar(grep {$_->name eq $product_name} @{$self->get_selectable_products});
}

sub get_selectable_products {
    my $self = shift;
    my $classification_id = shift;

    if (defined $self->{selectable_products}) {
        return $self->{selectable_products};
    }

    my $dbh = Bugzilla->dbh;
    my @params = ();

    my $query = "SELECT id " .
                "FROM products " .
                "LEFT JOIN group_control_map " .
                "ON group_control_map.product_id = products.id ";
    if (Bugzilla->params->{'useentrygroupdefault'}) {
        $query .= "AND group_control_map.entry != 0 ";
    } else {
        $query .= "AND group_control_map.membercontrol = " .
                  CONTROLMAPMANDATORY . " ";
    }
    $query .= "AND group_id NOT IN(" . 
               $self->groups_as_string . ") " .
              "WHERE group_id IS NULL ";

    if (Bugzilla->params->{'useclassification'} && $classification_id) {
        $query .= "AND classification_id = ? ";
        detaint_natural($classification_id);
        push(@params, $classification_id);
    }

    $query .= "ORDER BY name";

    my $prod_ids = $dbh->selectcol_arrayref($query, undef, @params);
    my @products;
    foreach my $prod_id (@$prod_ids) {
        push(@products, new Bugzilla::Product($prod_id));
    }
    $self->{selectable_products} = \@products;
    return $self->{selectable_products};
}

sub get_selectable_classifications {
    my ($self) = @_;

    if (defined $self->{selectable_classifications}) {
        return $self->{selectable_classifications};
    }

    my $products = $self->get_selectable_products;

    my $class;
    foreach my $product (@$products) {
        $class->{$product->classification_id} ||= 
            new Bugzilla::Classification($product->classification_id);
    }
    my @sorted_class = sort {lc($a->name) cmp lc($b->name)} (values %$class);
    $self->{selectable_classifications} = \@sorted_class;
    return $self->{selectable_classifications};
}

sub can_enter_product {
    my ($self, $product_name, $warn) = @_;
    my $dbh = Bugzilla->dbh;

    if (!defined($product_name)) {
        return unless $warn;
        ThrowUserError('no_products');
    }
    trick_taint($product_name);

    # Checks whether the user has access to the product.
    my $has_access = $dbh->selectrow_array('SELECT CASE WHEN group_id IS NULL
                                                        THEN 1 ELSE 0 END
                                              FROM products
                                         LEFT JOIN group_control_map
                                                ON group_control_map.product_id = products.id
                                               AND group_control_map.entry != 0
                                               AND group_id NOT IN (' . $self->groups_as_string . ')
                                             WHERE products.name = ? ' .
                                             $dbh->sql_limit(1),
                                            undef, $product_name);

    if (!$has_access) {
        return unless $warn;
        ThrowUserError('entry_access_denied', { product => $product_name });
    }

    # Checks whether the product is open for new bugs and
    # has at least one component and one version.
    my ($is_open, $has_version) = 
        $dbh->selectrow_array('SELECT CASE WHEN disallownew = 0
                                           THEN 1 ELSE 0 END,
                                      CASE WHEN versions.value IS NOT NULL
                                           THEN 1 ELSE 0 END
                                 FROM products
                           INNER JOIN components
                                   ON components.product_id = products.id
                            LEFT JOIN versions
                                   ON versions.product_id = products.id
                                WHERE products.name = ? ' .
                               $dbh->sql_limit(1), undef, $product_name);

    # Returns undef if the product has no components
    # Returns 0 if the product has no versions, or is closed for bug entry
    # Returns 1 if the user can enter bugs into the product
    return ($is_open && $has_version) unless $warn;

    # (undef, undef): the product has no components,
    # (0,     ?)    : the product is closed for new bug entry,
    # (?,     0)    : the product has no versions,
    # (1,     1)    : the user can enter bugs into the product,
    if (!defined $is_open) {
        ThrowUserError('missing_component', { product => $product_name });
    } elsif (!$is_open) {
        ThrowUserError('product_disabled', { product => $product_name });
    } elsif (!$has_version) {
        ThrowUserError('missing_version', { product => $product_name });
    }
    return 1;
}

sub get_enterable_products {
    my $self = shift;

    if (defined $self->{enterable_products}) {
        return $self->{enterable_products};
    }

    my @products;
    foreach my $product (Bugzilla::Product::get_all_products()) {
        if ($self->can_enter_product($product->name)) {
            push(@products, $product);
        }
    }
    $self->{enterable_products} = \@products;
    return $self->{enterable_products};
}

# visible_groups_inherited returns a reference to a list of all the groups
# whose members are visible to this user.
sub visible_groups_inherited {
    my $self = shift;
    return $self->{visible_groups_inherited} if defined $self->{visible_groups_inherited};
    return [] unless $self->id;
    my @visgroups = @{$self->visible_groups_direct};
    @visgroups = @{$self->flatten_group_membership(@visgroups)};
    $self->{visible_groups_inherited} = \@visgroups;
    return $self->{visible_groups_inherited};
}

# visible_groups_direct returns a reference to a list of all the groups that
# are visible to this user.
sub visible_groups_direct {
    my $self = shift;
    my @visgroups = ();
    return $self->{visible_groups_direct} if defined $self->{visible_groups_direct};
    return [] unless $self->id;

    my $dbh = Bugzilla->dbh;
    my $glist = join(',',(-1,values(%{$self->groups})));
    my $sth = $dbh->prepare("SELECT DISTINCT grantor_id
                                FROM group_group_map
                               WHERE member_id IN($glist)
                                 AND grant_type=" . GROUP_VISIBLE);
    $sth->execute();

    while (my ($row) = $sth->fetchrow_array) {
        push @visgroups,$row;
    }
    $self->{visible_groups_direct} = \@visgroups;

    return $self->{visible_groups_direct};
}

sub visible_groups_as_string {
    my $self = shift;
    return join(', ', @{$self->visible_groups_inherited()});
}

sub derive_regexp_groups {
    my ($self) = @_;

    my $id = $self->id;
    return unless $id;

    my $dbh = Bugzilla->dbh;

    my $sth;

    # avoid races, we are only up to date as of the BEGINNING of this process
    my $time = $dbh->selectrow_array("SELECT NOW()");

    # add derived records for any matching regexps

    $sth = $dbh->prepare("SELECT id, userregexp, user_group_map.group_id
                            FROM groups
                       LEFT JOIN user_group_map
                              ON groups.id = user_group_map.group_id
                             AND user_group_map.user_id = ?
                             AND user_group_map.grant_type = ?");
    $sth->execute($id, GRANT_REGEXP);

    my $group_insert = $dbh->prepare(q{INSERT INTO user_group_map
                                       (user_id, group_id, isbless, grant_type)
                                       VALUES (?, ?, 0, ?)});
    my $group_delete = $dbh->prepare(q{DELETE FROM user_group_map
                                       WHERE user_id = ?
                                         AND group_id = ?
                                         AND isbless = 0
                                         AND grant_type = ?});
    while (my ($group, $regexp, $present) = $sth->fetchrow_array()) {
        if (($regexp ne '') && ($self->{login} =~ m/$regexp/i)) {
            $group_insert->execute($id, $group, GRANT_REGEXP) unless $present;
        } else {
            $group_delete->execute($id, $group, GRANT_REGEXP) if $present;
        }
    }

    $dbh->do(q{UPDATE profiles SET refreshed_when = ? WHERE userid = ?},
             undef, ($time, $id));
}

sub product_responsibilities {
    my $self = shift;

    return $self->{'product_resp'} if defined $self->{'product_resp'};
    return [] unless $self->id;

    my $h = Bugzilla->dbh->selectall_arrayref(
        qq{SELECT products.name AS productname,
                  components.name AS componentname,
                  initialowner,
                  initialqacontact
           FROM products, components
           WHERE products.id = components.product_id
             AND ? IN (initialowner, initialqacontact)
          },
        {'Slice' => {}}, $self->id);
    $self->{'product_resp'} = $h;

    return $h;
}

sub can_bless {
    my $self = shift;

    if (!scalar(@_)) {
        # If we're called without an argument, just return 
        # whether or not we can bless at all.
        return scalar(@{$self->bless_groups}) ? 1 : 0;
    }

    # Otherwise, we're checking a specific group
    my $group_name = shift;
    return (grep {$$_{'name'} eq $group_name} (@{$self->bless_groups})) ? 1 : 0;
}

sub flatten_group_membership {
    my ($self, @groups) = @_;

    my $dbh = Bugzilla->dbh;
    my $sth;
    my @groupidstocheck = @groups;
    my %groupidschecked = ();
    $sth = $dbh->prepare("SELECT member_id FROM group_group_map
                             WHERE grantor_id = ? 
                               AND grant_type = " . GROUP_MEMBERSHIP);
    while (my $node = shift @groupidstocheck) {
        $sth->execute($node);
        my $member;
        while (($member) = $sth->fetchrow_array) {
            if (!$groupidschecked{$member}) {
                $groupidschecked{$member} = 1;
                push @groupidstocheck, $member;
                push @groups, $member unless grep $_ == $member, @groups;
            }
        }
    }
    return \@groups;
}

sub match {
    # Generates a list of users whose login name (email address) or real name
    # matches a substring or wildcard.
    # This is also called if matches are disabled (for error checking), but
    # in this case only the exact match code will end up running.

    # $str contains the string to match, while $limit contains the
    # maximum number of records to retrieve.
    my ($str, $limit, $exclude_disabled) = @_;
    my $user = Bugzilla->user;
    my $dbh = Bugzilla->dbh;

    my @users = ();
    return \@users if $str =~ /^\s*$/;

    # The search order is wildcards, then exact match, then substring search.
    # Wildcard matching is skipped if there is no '*', and exact matches will
    # not (?) have a '*' in them.  If any search comes up with something, the
    # ones following it will not execute.

    # first try wildcards
    my $wildstr = $str;

    if ($wildstr =~ s/\*/\%/g # don't do wildcards if no '*' in the string
        # or if we only want exact matches
        && Bugzilla->params->{'usermatchmode'} ne 'off') 
    {

        # Build the query.
        trick_taint($wildstr);
        my $query  = "SELECT DISTINCT login_name FROM profiles ";
        if (Bugzilla->params->{'usevisibilitygroups'}) {
            $query .= "INNER JOIN user_group_map
                               ON user_group_map.user_id = profiles.userid ";
        }
        $query .= "WHERE ("
            . $dbh->sql_istrcmp('login_name', '?', "LIKE") . " OR " .
              $dbh->sql_istrcmp('realname', '?', "LIKE") . ") ";
        if (Bugzilla->params->{'usevisibilitygroups'}) {
            $query .= "AND isbless = 0 " .
                      "AND group_id IN(" .
                      join(', ', (-1, @{$user->visible_groups_inherited})) . ") ";
        }
        $query    .= " AND disabledtext = '' " if $exclude_disabled;
        $query    .= " ORDER BY login_name ";
        $query    .= $dbh->sql_limit($limit) if $limit;

        # Execute the query, retrieve the results, and make them into
        # User objects.
        my $user_logins = $dbh->selectcol_arrayref($query, undef, ($wildstr, $wildstr));
        foreach my $login_name (@$user_logins) {
            push(@users, Bugzilla::User->new_from_login($login_name));
        }
    }
    else {    # try an exact match
        # Exact matches don't care if a user is disabled.
        trick_taint($str);
        my $user_id = $dbh->selectrow_array('SELECT userid FROM profiles
                                             WHERE ' . $dbh->sql_istrcmp('login_name', '?'),
                                             undef, $str);

        push(@users, new Bugzilla::User($user_id)) if $user_id;
    }

    # then try substring search
    if ((scalar(@users) == 0)
        && (Bugzilla->params->{'usermatchmode'} eq 'search')
        && (length($str) >= 3))
    {
        $str = lc($str);
        trick_taint($str);

        my $query   = "SELECT DISTINCT login_name FROM profiles ";
        if (Bugzilla->params->{'usevisibilitygroups'}) {
            $query .= "INNER JOIN user_group_map
                               ON user_group_map.user_id = profiles.userid ";
        }
        $query     .= " WHERE (" .
                $dbh->sql_position('?', 'LOWER(login_name)') . " > 0" . " OR " .
                $dbh->sql_position('?', 'LOWER(realname)') . " > 0) ";
        if (Bugzilla->params->{'usevisibilitygroups'}) {
            $query .= " AND isbless = 0" .
                      " AND group_id IN(" .
                join(', ', (-1, @{$user->visible_groups_inherited})) . ") ";
        }
        $query     .= " AND disabledtext = '' " if $exclude_disabled;
        $query    .= " ORDER BY login_name ";
        $query     .= $dbh->sql_limit($limit) if $limit;

        my $user_logins = $dbh->selectcol_arrayref($query, undef, ($str, $str));
        foreach my $login_name (@$user_logins) {
            push(@users, Bugzilla::User->new_from_login($login_name));
        }
    }
    return \@users;
}

# match_field() is a CGI wrapper for the match() function.
#
# Here's what it does:
#
# 1. Accepts a list of fields along with whether they may take multiple values
# 2. Takes the values of those fields from the first parameter, a $cgi object 
#    and passes them to match()
# 3. Checks the results of the match and displays confirmation or failure
#    messages as appropriate.
#
# The confirmation screen functions the same way as verify-new-product and
# confirm-duplicate, by rolling all of the state information into a
# form which is passed back, but in this case the searched fields are
# replaced with the search results.
#
# The act of displaying the confirmation or failure messages means it must
# throw a template and terminate.  When confirmation is sent, all of the
# searchable fields have been replaced by exact fields and the calling script
# is executed as normal.
#
# You also have the choice of *never* displaying the confirmation screen.
# In this case, match_field will return one of the three USER_MATCH 
# constants described in the POD docs. To make match_field behave this
# way, pass in MATCH_SKIP_CONFIRM as the third argument.
#
# match_field must be called early in a script, before anything external is
# done with the form data.
#
# In order to do a simple match without dealing with templates, confirmation,
# or globals, simply calling Bugzilla::User::match instead will be
# sufficient.

# How to call it:
#
# Bugzilla::User::match_field($cgi, {
#   'field_name'    => { 'type' => fieldtype },
#   'field_name2'   => { 'type' => fieldtype },
#   [...]
# });
#
# fieldtype can be either 'single' or 'multi'.
#

sub match_field {
    my $cgi          = shift;   # CGI object to look up fields in
    my $fields       = shift;   # arguments as a hash
    my $behavior     = shift || 0; # A constant that tells us how to act
    my $matches      = {};      # the values sent to the template
    my $matchsuccess = 1;       # did the match fail?
    my $need_confirm = 0;       # whether to display confirmation screen
    my $match_multiple = 0;     # whether we ever matched more than one user

    my $params = Bugzilla->params;

    # prepare default form values

    # What does a "--do_not_change--" field look like (if any)?
    my $dontchange = $cgi->param('dontchange');

    # Fields can be regular expressions matching multiple form fields
    # (f.e. "requestee-(\d+)"), so expand each non-literal field
    # into the list of form fields it matches.
    my $expanded_fields = {};
    foreach my $field_pattern (keys %{$fields}) {
        # Check if the field has any non-word characters.  Only those fields
        # can be regular expressions, so don't expand the field if it doesn't
        # have any of those characters.
        if ($field_pattern =~ /^\w+$/) {
            $expanded_fields->{$field_pattern} = $fields->{$field_pattern};
        }
        else {
            my @field_names = grep(/$field_pattern/, $cgi->param());
            foreach my $field_name (@field_names) {
                $expanded_fields->{$field_name} = 
                  { type => $fields->{$field_pattern}->{'type'} };
                
                # The field is a requestee field; in order for its name 
                # to show up correctly on the confirmation page, we need 
                # to find out the name of its flag type.
                if ($field_name =~ /^requestee-(\d+)$/) {
                    my $flag = Bugzilla::Flag::get($1);
                    $expanded_fields->{$field_name}->{'flag_type'} = 
                      $flag->{'type'};
                }
                elsif ($field_name =~ /^requestee_type-(\d+)$/) {
                    $expanded_fields->{$field_name}->{'flag_type'} = 
                      Bugzilla::FlagType::get($1);
                }
            }
        }
    }
    $fields = $expanded_fields;

    for my $field (keys %{$fields}) {

        # Tolerate fields that do not exist.
        #
        # This is so that fields like qa_contact can be specified in the code
        # and it won't break if the CGI object does not know about them.
        #
        # It has the side-effect that if a bad field name is passed it will be
        # quietly ignored rather than raising a code error.

        next if !defined $cgi->param($field);

        # Skip it if this is a --do_not_change-- field
        next if $dontchange && $dontchange eq $cgi->param($field);

        # We need to move the query to $raw_field, where it will be split up,
        # modified by the search, and put back into the CGI environment
        # incrementally.

        my $raw_field = join(" ", $cgi->param($field));

        # When we add back in values later, it matters that we delete
        # the field here, and not set it to '', so that we will add
        # things to an empty list, and not to a list containing one
        # empty string.
        # If the field accepts only one match (type eq "single") and
        # no match or more than one match is found for this field,
        # we will set it back to '' so that the field remains defined
        # outside this function (it was if we came here; else we would
        # have returned earlier above).
        # If the field accepts several matches (type eq "multi") and no match
        # is found, we leave this field undefined (= empty array).
        $cgi->delete($field);

        my @queries = ();

        # Now we either split $raw_field by spaces/commas and put the list
        # into @queries, or in the case of fields which only accept single
        # entries, we simply use the verbatim text.

        $raw_field =~ s/^\s+|\s+$//sg;  # trim leading/trailing space

        # single field
        if ($fields->{$field}->{'type'} eq 'single') {
            @queries = ($raw_field) unless $raw_field =~ /^\s*$/;

        # multi-field
        }
        elsif ($fields->{$field}->{'type'} eq 'multi') {
            @queries =  split(/[\s,]+/, $raw_field);

        }
        else {
            # bad argument
            ThrowCodeError('bad_arg',
                           { argument => $fields->{$field}->{'type'},
                             function =>  'Bugzilla::User::match_field',
                           });
        }

        my $limit = 0;
        if ($params->{'maxusermatches'}) {
            $limit = $params->{'maxusermatches'} + 1;
        }

        for my $query (@queries) {

            my $users = match(
                $query,   # match string
                $limit,   # match limit
                1         # exclude_disabled
            );

            # skip confirmation for exact matches
            if ((scalar(@{$users}) == 1)
                && (lc(@{$users}[0]->{'login'}) eq lc($query)))
            {
                $cgi->append(-name=>$field,
                             -values=>[@{$users}[0]->{'login'}]);

                next;
            }

            $matches->{$field}->{$query}->{'users'}  = $users;
            $matches->{$field}->{$query}->{'status'} = 'success';

            # here is where it checks for multiple matches

            if (scalar(@{$users}) == 1) { # exactly one match

                $cgi->append(-name=>$field,
                             -values=>[@{$users}[0]->{'login'}]);

                $need_confirm = 1 if $params->{'confirmuniqueusermatch'};

            }
            elsif ((scalar(@{$users}) > 1)
                    && ($params->{'maxusermatches'} != 1)) {
                $need_confirm = 1;
                $match_multiple = 1;

                if (($params->{'maxusermatches'})
                   && (scalar(@{$users}) > $params->{'maxusermatches'}))
                {
                    $matches->{$field}->{$query}->{'status'} = 'trunc';
                    pop @{$users};  # take the last one out
                }

            }
            else {
                # everything else fails
                $matchsuccess = 0; # fail
                $matches->{$field}->{$query}->{'status'} = 'fail';
                $need_confirm = 1;  # confirmation screen shows failures
            }
        }
        # Above, we deleted the field before adding matches. If no match
        # or more than one match has been found for a field expecting only
        # one match (type eq "single"), we set it back to '' so
        # that the caller of this function can still check whether this
        # field was defined or not (and it was if we came here).
        if (!defined $cgi->param($field)
            && $fields->{$field}->{'type'} eq 'single') {
            $cgi->param($field, '');
        }
    }

    my $retval;
    if (!$matchsuccess) {
        $retval = USER_MATCH_FAILED;
    }
    elsif ($match_multiple) {
        $retval = USER_MATCH_MULTIPLE;
    }
    else {
        $retval = USER_MATCH_SUCCESS;
    }

    # Skip confirmation if we were told to, or if we don't need to confirm.
    return $retval if ($behavior == MATCH_SKIP_CONFIRM || !$need_confirm);

    my $template = Bugzilla->template;
    my $vars = {};

    $vars->{'script'}        = Bugzilla->cgi->url(-relative => 1); # for self-referencing URLs
    $vars->{'fields'}        = $fields; # fields being matched
    $vars->{'matches'}       = $matches; # matches that were made
    $vars->{'matchsuccess'}  = $matchsuccess; # continue or fail

    print Bugzilla->cgi->header();

    $template->process("global/confirm-user-match.html.tmpl", $vars)
      || ThrowTemplateError($template->error());

    exit;

}

# Changes in some fields automatically trigger events. The 'field names' are
# from the fielddefs table. We really should be using proper field names 
# throughout.
our %names_to_events = (
    'Resolution'             => EVT_OPENED_CLOSED,
    'Keywords'               => EVT_KEYWORD,
    'CC'                     => EVT_CC,
    'Severity'               => EVT_PROJ_MANAGEMENT,
    'Priority'               => EVT_PROJ_MANAGEMENT,
    'Status'                 => EVT_PROJ_MANAGEMENT,
    'Target Milestone'       => EVT_PROJ_MANAGEMENT,
    'Attachment description' => EVT_ATTACHMENT_DATA,
    'Attachment mime type'   => EVT_ATTACHMENT_DATA,
    'Attachment is patch'    => EVT_ATTACHMENT_DATA,
    'BugsThisDependsOn'      => EVT_DEPEND_BLOCK,
    'OtherBugsDependingOnThis' => EVT_DEPEND_BLOCK);

# Returns true if the user wants mail for a given bug change.
# Note: the "+" signs before the constants suppress bareword quoting.
sub wants_bug_mail {
    my $self = shift;
    my ($bug_id, $relationship, $fieldDiffs, $commentField, $changer) = @_;

    # Don't send any mail, ever, if account is disabled 
    # XXX Temporary Compatibility Change 1 of 2:
    # This code is disabled for the moment to make the behaviour like the old
    # system, which sent bugmail to disabled accounts.
    # return 0 if $self->{'disabledtext'};
    
    # Make a list of the events which have happened during this bug change,
    # from the point of view of this user.    
    my %events;    
    foreach my $ref (@$fieldDiffs) {
        my ($who, $fieldName, $when, $old, $new) = @$ref;
        # A change to any of the above fields sets the corresponding event
        if (defined($names_to_events{$fieldName})) {
            $events{$names_to_events{$fieldName}} = 1;
        }
        else {
            # Catch-all for any change not caught by a more specific event
            # XXX: Temporary Compatibility Change 2 of 2:
            # This code is disabled, and replaced with the code a few lines
            # below, in order to make the behaviour more like the original, 
            # which only added this event if _all_ changes were of "other" type.
            # $events{+EVT_OTHER} = 1;            
        }

        # If the user is in a particular role and the value of that role
        # changed, we need the ADDED_REMOVED event.
        if (($fieldName eq "AssignedTo" && $relationship == REL_ASSIGNEE) ||
            ($fieldName eq "QAContact" && $relationship == REL_QA)) 
        {
            $events{+EVT_ADDED_REMOVED} = 1;
        }
        
        if ($fieldName eq "CC") {
            my $login = $self->login;
            my $inold = ($old =~ /^(.*,)?\Q$login\E(,.*)?$/);
            my $innew = ($new =~ /^(.*,)?\Q$login\E(,.*)?$/);
            if ($inold != $innew)
            {
                $events{+EVT_ADDED_REMOVED} = 1;
            }
        }
    }

    if ($commentField =~ /Created an attachment \(/) {
        $events{+EVT_ATTACHMENT} = 1;
    }
    elsif ($commentField ne '') {
        $events{+EVT_COMMENT} = 1;
    }
    
    my @event_list = keys %events;
    
    # XXX Temporary Compatibility Change 2 of 2:
    # See above comment.
    if (!scalar(@event_list)) {
      @event_list = (EVT_OTHER);
    }
    
    my $wants_mail = $self->wants_mail(\@event_list, $relationship);

    # The negative events are handled separately - they can't be incorporated
    # into the first wants_mail call, because they are of the opposite sense.
    # 
    # We do them separately because if _any_ of them are set, we don't want
    # the mail.
    if ($wants_mail && $changer && ($self->{'login'} eq $changer)) {
        $wants_mail &= $self->wants_mail([EVT_CHANGED_BY_ME], $relationship);
    }    
    
    if ($wants_mail) {
        my $dbh = Bugzilla->dbh;
        # We don't create a Bug object from the bug_id here because we only
        # need one piece of information, and doing so (as of 2004-11-23) slows
        # down bugmail sending by a factor of 2. If Bug creation was more
        # lazy, this might not be so bad.
        my $bug_status = $dbh->selectrow_array('SELECT bug_status
                                                FROM bugs WHERE bug_id = ?',
                                                undef, $bug_id);

        if ($bug_status eq "UNCONFIRMED") {
            $wants_mail &= $self->wants_mail([EVT_UNCONFIRMED], $relationship);
        }
    }
    
    return $wants_mail;
}

# Returns true if the user wants mail for a given set of events.
sub wants_mail {
    my $self = shift;
    my ($events, $relationship) = @_;
    
    # Don't send any mail, ever, if account is disabled 
    # XXX Temporary Compatibility Change 1 of 2:
    # This code is disabled for the moment to make the behaviour like the old
    # system, which sent bugmail to disabled accounts.
    # return 0 if $self->{'disabledtext'};
    
    # No mail if there are no events
    return 0 if !scalar(@$events);
    
    my $dbh = Bugzilla->dbh;
    
    # If a relationship isn't given, default to REL_ANY.
    if (!defined($relationship)) {
        $relationship = REL_ANY;
    }
    
    my $wants_mail = 
        $dbh->selectrow_array('SELECT 1
                                 FROM email_setting
                                WHERE user_id = ?
                                  AND relationship = ?
                                  AND event IN (' . join(',', @$events) . ') ' .
                                      $dbh->sql_limit(1),
                              undef, ($self->{'id'}, $relationship));

    return defined($wants_mail) ? 1 : 0;
}

sub is_mover {
    my $self = shift;

    if (!defined $self->{'is_mover'}) {
        my @movers = map { trim($_) } split(',', Bugzilla->params->{'movers'});
        $self->{'is_mover'} = ($self->id
                               && lsearch(\@movers, $self->login) != -1);
    }
    return $self->{'is_mover'};
}

sub get_userlist {
    my $self = shift;

    return $self->{'userlist'} if defined $self->{'userlist'};

    my $dbh = Bugzilla->dbh;
    my $query  = "SELECT DISTINCT login_name, realname,";
    if (Bugzilla->params->{'usevisibilitygroups'}) {
        $query .= " COUNT(group_id) ";
    } else {
        $query .= " 1 ";
    }
    $query     .= "FROM profiles ";
    if (Bugzilla->params->{'usevisibilitygroups'}) {
        $query .= "LEFT JOIN user_group_map " .
                  "ON user_group_map.user_id = userid AND isbless = 0 " .
                  "AND group_id IN(" .
                  join(', ', (-1, @{$self->visible_groups_inherited})) . ")";
    }
    $query    .= " WHERE disabledtext = '' ";
    $query    .= $dbh->sql_group_by('userid', 'login_name, realname');

    my $sth = $dbh->prepare($query);
    $sth->execute;

    my @userlist;
    while (my($login, $name, $visible) = $sth->fetchrow_array) {
        push @userlist, {
            login => $login,
            identity => $name ? "$name <$login>" : $login,
            visible => $visible,
        };
    }
    @userlist = sort { lc $$a{'identity'} cmp lc $$b{'identity'} } @userlist;

    $self->{'userlist'} = \@userlist;
    return $self->{'userlist'};
}

sub insert_new_user {
    my ($username, $realname, $password, $disabledtext) = (@_);
    my $dbh = Bugzilla->dbh;

    $disabledtext ||= '';

    # If not specified, generate a new random password for the user.
    # If the password is '*', do not encrypt it; we are creating a user
    # based on the ENV auth method.
    $password ||= generate_random_password();
    my $cryptpassword = ($password ne '*') ? bz_crypt($password) : $password;

    # XXX - These should be moved into is_available_username or validate_email_syntax
    #       At the least, they shouldn't be here. They're safe for now, though.
    trick_taint($username);
    trick_taint($realname);

    # Insert the new user record into the database.
    $dbh->do("INSERT INTO profiles 
                          (login_name, realname, cryptpassword, disabledtext,
                           refreshed_when) 
                   VALUES (?, ?, ?, ?, '1901-01-01 00:00:00')",
             undef, 
             ($username, $realname, $cryptpassword, $disabledtext));

    # Turn on all email for the new user
    my $new_userid = $dbh->bz_last_key('profiles', 'userid');

    foreach my $rel (RELATIONSHIPS) {
        foreach my $event (POS_EVENTS, NEG_EVENTS) {
            # These "exceptions" define the default email preferences.
            # 
            # We enable mail unless the change was made by the user, or it's
            # just a CC list addition and the user is not the reporter.
            next if ($event == EVT_CHANGED_BY_ME);
            next if (($event == EVT_CC) && ($rel != REL_REPORTER));

            $dbh->do('INSERT INTO email_setting (user_id, relationship, event)
                      VALUES (?, ?, ?)', undef, ($new_userid, $rel, $event));
        }
    }

    foreach my $event (GLOBAL_EVENTS) {
        $dbh->do('INSERT INTO email_setting (user_id, relationship, event)
                  VALUES (?, ?, ?)', undef, ($new_userid, REL_ANY, $event));
    }

    my $user = new Bugzilla::User($new_userid);
    $user->derive_regexp_groups();

    # Add the creation date to the profiles_activity table.
    # $who is the user who created the new user account, i.e. either an
    # admin or the new user himself.
    my $who = Bugzilla->user->id || $user->id;
    my $creation_date_fieldid = get_field_id('creation_ts');

    $dbh->do('INSERT INTO profiles_activity
                          (userid, who, profiles_when, fieldid, newvalue)
                   VALUES (?, ?, NOW(), ?, NOW())',
                   undef, ($user->id, $who, $creation_date_fieldid));

    # Return the password to the calling code so it can be included
    # in an email sent to the user.
    return $password;
}

sub is_available_username {
    my ($username, $old_username) = @_;

    if(login_to_id($username) != 0) {
        return 0;
    }

    my $dbh = Bugzilla->dbh;
    # $username is safe because it is only used in SELECT placeholders.
    trick_taint($username);
    # Reject if the new login is part of an email change which is
    # still in progress
    #
    # substring/locate stuff: bug 165221; this used to use regexes, but that
    # was unsafe and required weird escaping; using substring to pull out
    # the new/old email addresses and sql_position() to find the delimiter (':')
    # is cleaner/safer
    my $sth = $dbh->prepare(
        "SELECT eventdata FROM tokens WHERE tokentype = 'emailold'
        AND SUBSTRING(eventdata, 1, (" 
        . $dbh->sql_position(q{':'}, 'eventdata') . "-  1)) = ?
        OR SUBSTRING(eventdata, (" 
        . $dbh->sql_position(q{':'}, 'eventdata') . "+ 1)) = ?");
    $sth->execute($username, $username);

    if (my ($eventdata) = $sth->fetchrow_array()) {
        # Allow thru owner of token
        if($old_username && ($eventdata eq "$old_username:$username")) {
            return 1;
        }
        return 0;
    }

    return 1;
}

sub login_to_id {
    my ($login, $throw_error) = @_;
    my $dbh = Bugzilla->dbh;
    # $login will only be used by the following SELECT statement, so it's safe.
    trick_taint($login);
    my $user_id = $dbh->selectrow_array("SELECT userid FROM profiles WHERE " .
                                        $dbh->sql_istrcmp('login_name', '?'),
                                        undef, $login);
    if ($user_id) {
        return $user_id;
    } elsif ($throw_error) {
        ThrowUserError('invalid_username', { name => $login });
    } else {
        return 0;
    }
}

sub user_id_to_login {
    my $user_id = shift;
    my $dbh = Bugzilla->dbh;

    return '' unless ($user_id && detaint_natural($user_id));

    my $login = $dbh->selectrow_array('SELECT login_name FROM profiles
                                       WHERE userid = ?', undef, $user_id);
    return $login || '';
}

sub validate_password {
    my ($password, $matchpassword) = @_;

    if (length($password) < USER_PASSWORD_MIN_LENGTH) {
        ThrowUserError('password_too_short');
    } elsif (length($password) > USER_PASSWORD_MAX_LENGTH) {
        ThrowUserError('password_too_long');
    } elsif ((defined $matchpassword) && ($password ne $matchpassword)) {
        ThrowUserError('passwords_dont_match');
    }
    return 1;
}

sub UserInGroup {
    return exists Bugzilla->user->groups->{$_[0]} ? 1 : 0;
}

1;

__END__

=head1 NAME

Bugzilla::User - Object for a Bugzilla user

=head1 SYNOPSIS

  use Bugzilla::User;

  my $user = new Bugzilla::User($id);

  my @get_selectable_classifications = 
      $user->get_selectable_classifications;

  # Class Functions
  $password = insert_new_user($username, $realname, $password, $disabledtext);

=head1 DESCRIPTION

This package handles Bugzilla users. Data obtained from here is read-only;
there is currently no way to modify a user from this package.

Note that the currently logged in user (if any) is available via
L<Bugzilla-E<gt>user|Bugzilla/"user">.

=head1 CONSTANTS

=over

=item C<USER_MATCH_MULTIPLE>

Returned by C<match_field()> when at least one field matched more than 
one user, but no matches failed.

=item C<USER_MATCH_FAILED>

Returned by C<match_field()> when at least one field failed to match 
anything.

=item C<USER_MATCH_SUCCESS>

Returned by C<match_field()> when all fields successfully matched only one
user.

=item C<MATCH_SKIP_CONFIRM>

Passed in to match_field to tell match_field to never display a 
confirmation screen.

=back

=head1 METHODS

=over 4

=item C<new($userid)>

Creates a new C<Bugzilla::User> object for the given user id.  If no user
id was given, a blank object is created with no user attributes.

If an id was given but there was no matching user found, undef is returned.

=begin undocumented

=item C<new_from_login($login)>

Creates a new C<Bugzilla::User> object given the provided login. Returns
C<undef> if no matching user is found.

This routine should not be required in general; most scripts should be using
userids instead.

=end undocumented

=item C<id>

Returns the userid for this user.

=item C<login>

Returns the login name for this user.

=item C<email>

Returns the user's email address. Currently this is the same value as the
login.

=item C<name>

Returns the 'real' name for this user, if any.

=item C<showmybugslink>

Returns C<1> if the user has set his preference to show the 'My Bugs' link in
the page footer, and C<0> otherwise.

=item C<identity>

Returns a string for the identity of the user. This will be of the form
C<name E<lt>emailE<gt>> if the user has specified a name, and C<email>
otherwise.

=item C<nick>

Returns a user "nickname" -- i.e. a shorter, not-necessarily-unique name by
which to identify the user. Currently the part of the user's email address
before the at sign (@), but that could change, especially if we implement
usernames not dependent on email address.

=item C<authorizer>

This is the L<Bugzilla::Auth> object that the User logged in with.
If the user hasn't logged in yet, a new, empty Bugzilla::Auth() object is
returned.

=item C<set_authorizer($authorizer)>

Sets the L<Bugzilla::Auth> object to be returned by C<authorizer()>.
Should only be called by C<Bugzilla::Auth::login>, for the most part.

=item C<queries>

Returns an array of the user's named queries, sorted in a case-insensitive
order by name. Each entry is a hash with three keys:

=over

=item *

name - The name of the query

=item *

query - The text for the query

=item *

linkinfooter - Whether or not the query should be displayed in the footer.

=back

=item C<disabledtext>

Returns the disable text of the user, if any.

=item C<settings>

Returns a hash of hashes which holds the user's settings. The first key is
the name of the setting, as found in setting.name. The second key is one of:
is_enabled     - true if the user is allowed to set the preference themselves;
                 false to force the site defaults
                 for themselves or must accept the global site default value
default_value  - the global site default for this setting
value          - the value of this setting for this user. Will be the same
                 as the default_value if the user is not logged in, or if 
                 is_default is true.
is_default     - a boolean to indicate whether the user has chosen to make
                 a preference for themself or use the site default.

=item C<flush_queries_cache>

Some code modifies the set of stored queries. Because C<Bugzilla::User> does
not handle these modifications, but does cache the result of calling C<queries>
internally, such code must call this method to flush the cached result.

=item C<groups>

Returns a hashref of group names for groups the user is a member of. The keys
are the names of the groups, whilst the values are the respective group ids.
(This is so that a set of all groupids for groups the user is in can be
obtained by C<values(%{$user-E<gt>groups})>.)

=item C<groups_as_string>

Returns a string containing a comma-seperated list of numeric group ids.  If
the user is not a member of any groups, returns "-1". This is most often used
within an SQL IN() function.

=item C<in_group>

Determines whether or not a user is in the given group by name. 

=item C<in_group_id>

Determines whether or not a user is in the given group by id. 

=item C<bless_groups>

Returns an arrayref of hashes of C<groups> entries, where the keys of each hash
are the names of C<id>, C<name> and C<description> columns of the C<groups>
table.
The arrayref consists of the groups the user can bless, taking into account
that having editusers permissions means that you can bless all groups, and
that you need to be aware of a group in order to bless a group.

=item C<can_see_user(user)>

Returns 1 if the specified user account exists and is visible to the user,
0 otherwise.

=item C<can_edit_product(prod_id)>

Determines if, given a product id, the user can edit bugs in this product
at all.

=item C<can_see_bug(bug_id)>

Determines if the user can see the specified bug.

=item C<can_see_product(product_name)>

Returns 1 if the user can access the specified product, and 0 if the user
should not be aware of the existence of the product.

=item C<derive_regexp_groups>

Bugzilla allows for group inheritance. When data about the user (or any of the
groups) changes, the database must be updated. Handling updated groups is taken
care of by the constructor. However, when updating the email address, the
user may be placed into different groups, based on a new email regexp. This
method should be called in such a case to force reresolution of these groups.

=item C<get_selectable_products>

 Description: Returns all products the user is allowed to access. This list
              is restricted to some given classification if $classification_id
              is given.

 Params:      $classification_id - (optional) The ID of the classification
                                   the products belong to.

 Returns:     An array of product objects, sorted by the product name.

=item C<get_selectable_classifications>

 Description: Returns all classifications containing at least one product
              the user is allowed to view.

 Params:      none

 Returns:     An array of Bugzilla::Classification objects, sorted by
              the classification name.

=item C<can_enter_product($product_name, $warn)>

 Description: Returns 1 if the user can enter bugs into the specified product.
              If the user cannot enter bugs into the product, the behavior of
              this method depends on the value of $warn:
              - if $warn is false (or not given), a 'false' value is returned;
              - if $warn is true, an error is thrown.

 Params:      $product_name - a product name.
              $warn         - optional parameter, indicating whether an error
                              must be thrown if the user cannot enter bugs
                              into the specified product.

 Returns:     1 if the user can enter bugs into the product,
              0 if the user cannot enter bugs into the product and if $warn
              is false (an error is thrown if $warn is true).

=item C<get_enterable_products>

 Description: Returns an array of product objects into which the user is
              allowed to enter bugs.

 Params:      none

 Returns:     an array of product objects.

=item C<get_userlist>

Returns a reference to an array of users.  The array is populated with hashrefs
containing the login, identity and visibility.  Users that are not visible to this
user will have 'visible' set to zero.

=item C<flatten_group_membership>

Accepts a list of groups and returns a list of all the groups whose members 
inherit membership in any group on the list.  So, we can determine if a user
is in any of the groups input to flatten_group_membership by querying the
user_group_map for any user with DIRECT or REGEXP membership IN() the list
of groups returned.

=item C<visible_groups_inherited>

Returns a list of all groups whose members should be visible to this user.
Since this list is flattened already, there is no need for all users to
be have derived groups up-to-date to select the users meeting this criteria.

=item C<visible_groups_direct>

Returns a list of groups that the user is aware of.

=item C<visible_groups_as_string>

Returns the result of C<visible_groups_direct> as a string (a comma-separated
list).

=item C<product_responsibilities>

Retrieve user's product responsibilities as a list of hashes.
One hash per Bugzilla component the user has a responsibility for.
These are the hash keys:

=over

=item productname

Name of the product.

=item componentname

Name of the component.

=item initialowner

User ID of default assignee.

=item initialqacontact

User ID of default QA contact.

=back

=item C<can_bless>

When called with no arguments:
Returns C<1> if the user can bless at least one group, returns C<0> otherwise.

When called with one argument:
Returns C<1> if the user can bless the group with that name, returns
C<0> otherwise.

=item C<wants_bug_mail>

Returns true if the user wants mail for a given bug change.

=item C<wants_mail>

Returns true if the user wants mail for a given set of events. This method is
more general than C<wants_bug_mail>, allowing you to check e.g. permissions
for flag mail.

=item C<is_mover>

Returns true if the user is in the list of users allowed to move bugs
to another database. Note that this method doesn't check whether bug
moving is enabled.

=back

=head1 CLASS FUNCTIONS

These are functions that are not called on a User object, but instead are
called "statically," just like a normal procedural function.

=over 4

=item C<insert_new_user>

Creates a new user in the database.

Params: $username (scalar, string) - The login name for the new user.
        $realname (scalar, string) - The full name for the new user.
        $password (scalar, string) - Optional. The password for the new user;
                                     if not given, a random password will be
                                     generated.
        $disabledtext (scalar, string) - Optional. The disable text for the new
                                         user; if not given, it will be empty.
                                         If given, the user will be disabled,
                                         meaning the account will be
                                         unavailable for login.

Returns: The password for this user, in plain text, so it can be included
         in an e-mail sent to the user.

=item C<is_available_username>

Returns a boolean indicating whether or not the supplied username is
already taken in Bugzilla.

Params: $username (scalar, string) - The full login name of the username 
            that you are checking.
        $old_username (scalar, string) - If you are checking an email-change
            token, insert the "old" username that the user is changing from,
            here. Then, as long as it's the right user for that token, he 
            can change his username to $username. (That is, this function
            will return a boolean true value).

=item C<login_to_id($login, $throw_error)>

Takes a login name of a Bugzilla user and changes that into a numeric
ID for that user. This ID can then be passed to Bugzilla::User::new to
create a new user.

If no valid user exists with that login name, then the function returns 0.
However, if $throw_error is set, the function will throw a user error
instead of returning.

This function can also be used when you want to just find out the userid
of a user, but you don't want the full weight of Bugzilla::User.

However, consider using a Bugzilla::User object instead of this function
if you need more information about the user than just their ID.

=item C<user_id_to_login($user_id)>

Returns the login name of the user account for the given user ID. If no
valid user ID is given or the user has no entry in the profiles table,
we return an empty string.

=item C<validate_password($passwd1, $passwd2)>

Returns true if a password is valid (i.e. meets Bugzilla's
requirements for length and content), else returns false.

If a second password is passed in, this function also verifies that
the two passwords match.

=item C<UserInGroup($groupname)>

Takes a name of a group, and returns 1 if a user is in the group, 0 otherwise.

=back

=head1 SEE ALSO

L<Bugzilla|Bugzilla>