summaryrefslogtreecommitdiffstats
path: root/process_bug.cgi
blob: d37ec5231674f523f455d073387397f4b89ca65e (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
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
#!/usr/bin/perl -wT
# -*- 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): Terry Weissman <terry@mozilla.org>
#                 Dan Mosedale <dmose@mozilla.org>
#                 Dave Miller <justdave@syndicomm.com>
#                 Christopher Aillon <christopher@aillon.com>
#                 Myk Melez <myk@mozilla.org>
#                 Jeff Hedlund <jeff.hedlund@matrixsi.com>
#                 Frédéric Buclin <LpSolit@gmail.com>
#                 Lance Larsh <lance.larsh@oracle.com>

# Implementation notes for this file:
#
# 1) the 'id' form parameter is validated early on, and if it is not a valid
# bugid an error will be reported, so it is OK for later code to simply check
# for a defined form 'id' value, and it can assume a valid bugid.
#
# 2) If the 'id' form parameter is not defined (after the initial validation),
# then we are processing multiple bugs, and @idlist will contain the ids.
#
# 3) If we are processing just the one id, then it is stored in @idlist for
# later processing.

use strict;

my $UserInEditGroupSet = -1;
my $UserInCanConfirmGroupSet = -1;
my $PrivilegesRequired = 0;
my $lastbugid = 0;

use lib qw(.);

require "globals.pl";
use Bugzilla;
use Bugzilla::Constants;
use Bugzilla::Bug;
use Bugzilla::BugMail;
use Bugzilla::User;
use Bugzilla::Util;
use Bugzilla::Field;

# Use the Flag module to modify flag data if the user set flags.
use Bugzilla::Flag;
use Bugzilla::FlagType;

# Shut up misguided -w warnings about "used only once":

use vars qw(@legal_product
          %versions
          %components
          %legal_opsys
          %legal_platform
          %legal_priority
          %settable_resolution
          %target_milestone
          %legal_severity
           );

my $user = Bugzilla->login(LOGIN_REQUIRED);
my $whoid = $user->id;
my $grouplist = $user->groups_as_string;

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

my $requiremilestone = 0;

######################################################################
# Subroutines
######################################################################

sub BugInGroupId {
    my ($bug_id, $group_id) = @_;
    detaint_natural($bug_id);
    detaint_natural($group_id);
    my ($in_group) = Bugzilla->dbh->selectrow_array(
        "SELECT CASE WHEN bug_id != 0 THEN 1 ELSE 0 END
           FROM bug_group_map
          WHERE bug_id = ? AND group_id = ?", undef, ($bug_id, $group_id));
    return $in_group;
}

######################################################################
# Begin Data/Security Validation
######################################################################

# Create a list of IDs of all bugs being modified in this request.
# This list will either consist of a single bug number from the "id"
# form/URL field or a series of numbers from multiple form/URL fields
# named "id_x" where "x" is the bug number.
# For each bug being modified, make sure its ID is a valid bug number 
# representing an existing bug that the user is authorized to access.
my @idlist;
if (defined $cgi->param('id')) {
  my $id = $cgi->param('id');
  ValidateBugID($id);

  # Store the validated, and detainted id back in the cgi data, as
  # lots of later code will need it, and will obtain it from there
  $cgi->param('id', $id);
  push @idlist, $id;
} else {
    foreach my $i ($cgi->param()) {
        if ($i =~ /^id_([1-9][0-9]*)/) {
            my $id = $1;
            ValidateBugID($id);
            push @idlist, $id;
        }
    }
}

# Make sure there are bugs to process.
scalar(@idlist) || ThrowUserError("no_bugs_chosen");

# Make sure form param 'dontchange' is defined so it can be compared to easily.
$cgi->param('dontchange','') unless defined $cgi->param('dontchange');

# Make sure the 'knob' param is defined; else set it to 'none'.
$cgi->param('knob', 'none') unless defined $cgi->param('knob');

# Validate all timetracking fields
foreach my $field ("estimated_time", "work_time", "remaining_time") {
    if (defined $cgi->param($field)) {
        my $er_time = trim($cgi->param($field));
        if ($er_time ne $cgi->param('dontchange')) {
            Bugzilla::Bug::ValidateTime($er_time, $field);
        }
    }
}

if (UserInGroup(Param('timetrackinggroup'))) {
    my $wk_time = $cgi->param('work_time');
    if ($cgi->param('comment') =~ /^\s*$/ && $wk_time && $wk_time != 0) {
        ThrowUserError('comment_required');
    }
}

ValidateComment(scalar $cgi->param('comment'));

# If the bug(s) being modified have dependencies, validate them
# and rebuild the list with the validated values.  This is important
# because there are situations where validation changes the value
# instead of throwing an error, f.e. when one or more of the values
# is a bug alias that gets converted to its corresponding bug ID
# during validation.
foreach my $field ("dependson", "blocked") {
    if ($cgi->param('id')) {
        my $bug = new Bugzilla::Bug($cgi->param('id'), $user->id);
        my @old = @{$bug->$field};
        my @new;
        foreach my $id (split(/[\s,]+/, $cgi->param($field))) {
            next unless $id;
            ValidateBugID($id, $field);
            push @new, $id;
        }
        $cgi->param($field, join(",", @new));
        my ($added, $removed) = Bugzilla::Util::diff_arrays(\@old, \@new);
        foreach my $id (@$added , @$removed) {
            # ValidateBugID is called without $field here so that it will
            # throw an error if any of the changed bugs are not visible.
            ValidateBugID($id);
            if (Param("strict_isolation")) {
                my $deltabug = new Bugzilla::Bug($id, $user->id);
                if (!$user->can_edit_product($deltabug->{'product_id'})) {
                    $vars->{'field'} = $field;
                    ThrowUserError("illegal_change_deps", $vars);
                }
            }
        }
        if ((@$added  || @$removed)
            && (!CheckCanChangeField($field, $bug->bug_id, 0, 1))) {
            $vars->{'privs'} = $PrivilegesRequired;
            $vars->{'field'} = $field;
            ThrowUserError("illegal_change", $vars);
        }
    } else {
        # Bugzilla does not support mass-change of dependencies so they
        # are not validated.  To prevent a URL-hacking risk, the dependencies
        # are deleted for mass-changes.
        $cgi->delete($field);
    }
}

# do a match on the fields if applicable

# The order of these function calls is important, as both Flag::validate
# and FlagType::validate assume User::match_field has ensured that the values
# in the requestee fields are legitimate user email addresses.
&Bugzilla::User::match_field($cgi, {
    'qa_contact'                => { 'type' => 'single' },
    'newcc'                     => { 'type' => 'multi'  },
    'masscc'                    => { 'type' => 'multi'  },
    'assigned_to'               => { 'type' => 'single' },
    '^requestee(_type)?-(\d+)$' => { 'type' => 'multi'  },
});

# Validate flags in all cases. validate() should not detect any
# reference to flags if $cgi->param('id') is undefined.
Bugzilla::Flag::validate($cgi, $cgi->param('id'));
Bugzilla::FlagType::validate($cgi, $cgi->param('id'));

######################################################################
# End Data/Security Validation
######################################################################

print $cgi->header();
$vars->{'title_tag'} = "bug_processed";

# Set the title if we can see a mid-air coming. This test may have false
# negatives, but never false positives, and should catch the majority of cases.
# It only works at all in the single bug case.
if (defined $cgi->param('id')) {
    SendSQL("SELECT delta_ts FROM bugs WHERE bug_id = " .
            $cgi->param('id'));
    my $delta_ts = FetchOneColumn();
    
    if (defined $cgi->param('delta_ts') && $cgi->param('delta_ts') ne $delta_ts)
    {
        $vars->{'title_tag'} = "mid_air";
    }
}

# Set up the vars for nagiavtional <link> elements
my @bug_list;
if ($cgi->cookie("BUGLIST") && defined $cgi->param('id')) {
    @bug_list = split(/:/, $cgi->cookie("BUGLIST"));
    $vars->{'bug_list'} = \@bug_list;
}

GetVersionTable();

foreach my $field_name ('product', 'component', 'version') {
    defined($cgi->param($field_name))
      || ThrowCodeError('undefined_field', { field => $field_name });
}

# This function checks if there is a comment required for a specific
# function and tests, if the comment was given.
# If comments are required for functions is defined by params.
#
sub CheckonComment {
    my ($function) = (@_);
    
    # Param is 1 if comment should be added !
    my $ret = Param( "commenton" . $function );

    # Allow without comment in case of undefined Params.
    $ret = 0 unless ( defined( $ret ));

    if( $ret ) {
        if (!defined $cgi->param('comment')
            || $cgi->param('comment') =~ /^\s*$/) {
            # No comment - sorry, action not allowed !
            ThrowUserError("comment_required");
        } else {
            $ret = 0;
        }
    }
    return( ! $ret ); # Return val has to be inverted
}

# Figure out whether or not the user is trying to change the product
# (either the "product" variable is not set to "don't change" or the
# user is changing a single bug and has changed the bug's product),
# and make the user verify the version, component, target milestone,
# and bug groups if so.
my $oldproduct = '';
if (defined $cgi->param('id')) {
    SendSQL("SELECT name FROM products INNER JOIN bugs " .
            "ON products.id = bugs.product_id WHERE bug_id = " .
            $cgi->param('id'));
    $oldproduct = FetchSQLData();
}

if (((defined $cgi->param('id') && $cgi->param('product') ne $oldproduct) 
     || (!$cgi->param('id')
         && $cgi->param('product') ne $cgi->param('dontchange')))
    && CheckonComment( "reassignbycomponent" ))
{
    # Check to make sure they actually have the right to change the product
    if (!CheckCanChangeField('product', scalar $cgi->param('id'), $oldproduct,
                              $cgi->param('product'))) {
        $vars->{'oldvalue'} = $oldproduct;
        $vars->{'newvalue'} = $cgi->param('product');
        $vars->{'field'} = 'product';
        $vars->{'privs'} = $PrivilegesRequired;
        ThrowUserError("illegal_change", $vars);
    }

    my $prod = $cgi->param('product');
    trick_taint($prod);

    # If at least one bug does not belong to the product we are
    # moving to, we have to check whether or not the user is
    # allowed to enter bugs into that product.
    # Note that this check must be done early to avoid the leakage
    # of component, version and target milestone names.
    my $check_can_enter =
        $dbh->selectrow_array("SELECT 1 FROM bugs
                               INNER JOIN products
                               ON bugs.product_id = products.id
                               WHERE products.name != ?
                               AND bugs.bug_id IN
                               (" . join(',', @idlist) . ") " .
                               $dbh->sql_limit(1),
                               undef, $prod);

    if ($check_can_enter) { $user->can_enter_product($prod, 1) }

    # note that when this script is called from buglist.cgi (rather
    # than show_bug.cgi), it's possible that the product will be changed
    # but that the version and/or component will be set to 
    # "--dont_change--" but still happen to be correct.  in this case,
    # the if statement will incorrectly trigger anyway.  this is a 
    # pretty weird case, and not terribly unreasonable behavior, but 
    # worthy of a comment, perhaps.
    #
    my $vok = lsearch($::versions{$prod}, $cgi->param('version')) >= 0;
    my $cok = lsearch($::components{$prod}, $cgi->param('component')) >= 0;

    my $mok = 1;   # so it won't affect the 'if' statement if milestones aren't used
    if ( Param("usetargetmilestone") ) {
       defined($cgi->param('target_milestone'))
         || ThrowCodeError('undefined_field', { field => 'target_milestone' });

       $mok = lsearch($::target_milestone{$prod},
                      $cgi->param('target_milestone')) >= 0;
    }

    # If the product-specific fields need to be verified, or we need to verify
    # whether or not to add the bugs to their new product's group, display
    # a verification form.
    if (!$vok || !$cok || !$mok || (AnyDefaultGroups()
        && !defined $cgi->param('addtonewgroup'))) {
        
        if (!$vok || !$cok || !$mok) {
            $vars->{'verify_fields'} = 1;
            my %defaults;
            # We set the defaults to these fields to the old value,
            # if its a valid option, otherwise we use the default where
            # that's appropriate
            $vars->{'versions'} = $::versions{$prod};
            if ($vok) {
                $defaults{'version'} = $cgi->param('version');
            }
            $vars->{'components'} = $::components{$prod};
            if ($cok) {
                $defaults{'component'} = $cgi->param('component');
            }
            if (Param("usetargetmilestone")) {
                $vars->{'use_target_milestone'} = 1;
                $vars->{'milestones'} = $::target_milestone{$prod};
                if ($mok) {
                    $defaults{'target_milestone'} = $cgi->param('target_milestone');
                } else {
                    SendSQL("SELECT defaultmilestone FROM products " .
                            "WHERE name = " . SqlQuote($prod));
                    $defaults{'target_milestone'} = FetchOneColumn();
                }
            }
            else {
                $vars->{'use_target_milestone'} = 0;
            }
            $vars->{'defaults'} = \%defaults;
        }
        else {
            $vars->{'verify_fields'} = 0;
        }
        
        $vars->{'verify_bug_group'} = (AnyDefaultGroups() 
                                       && !defined $cgi->param('addtonewgroup'));
        
        $template->process("bug/process/verify-new-product.html.tmpl", $vars)
          || ThrowTemplateError($template->error());
        exit;
    }
}


# Checks that the user is allowed to change the given field.  Actually, right
# now, the rules are pretty simple, and don't look at the field itself very
# much, but that could be enhanced.

my $ownerid;
my $reporterid;
my $qacontactid;

################################################################################
# CheckCanChangeField() defines what users are allowed to change what bugs. You
# can add code here for site-specific policy changes, according to the 
# instructions given in the Bugzilla Guide and below. Note that you may also
# have to update the Bugzilla::Bug::user() function to give people access to the
# options that they are permitted to change.
#
# CheckCanChangeField() should return true if the user is allowed to change this
# field, and false if they are not.
#
# The parameters to this function are as follows:
# $field    - name of the field in the bugs table the user is trying to change
# $bugid    - the ID of the bug they are changing
# $oldvalue - what they are changing it from
# $newvalue - what they are changing it to
#
# Note that this function is currently not called for dependency changes 
# (bug 141593) or CC changes, which means anyone can change those fields.
#
# Do not change the sections between START DO_NOT_CHANGE and END DO_NOT_CHANGE.
################################################################################
sub CheckCanChangeField {
    # START DO_NOT_CHANGE
    my ($field, $bugid, $oldvalue, $newvalue) = (@_);

    $oldvalue = defined($oldvalue) ? $oldvalue : '';
    $newvalue = defined($newvalue) ? $newvalue : '';

    # Return true if they haven't changed this field at all.
    if ($oldvalue eq $newvalue) {
        return 1;
    } elsif (trim($oldvalue) eq trim($newvalue)) {
        return 1;
    # numeric fields need to be compared using == 
    } elsif (($field eq "estimated_time" || $field eq "remaining_time")
             && $newvalue ne $cgi->param('dontchange')
             && $oldvalue == $newvalue)
    {
        return 1;
    }

    # A resolution change is always accompanied by a status change. So, we 
    # always OK resolution changes; if they really can't do this, we will 
    # notice it when status is checked. 
    if ($field eq "resolution") { 
        return 1;             
    }
    # END DO_NOT_CHANGE

    # Allow anyone to change comments.
    if ($field =~ /^longdesc/) {
        return 1;
    }

    # Ignore the assigned_to field if the bug is not being reassigned
    if ($field eq "assigned_to"
        && $cgi->param('knob') ne "reassignbycomponent"
        && $cgi->param('knob') ne "reassign")
    {
        return 1;
    }

    # START DO_NOT_CHANGE
    # Find out whether the user is a member of the "editbugs" and/or
    # "canconfirm" groups. $UserIn*GroupSet are caches of the return value of 
    # the UserInGroup calls.
    if ($UserInEditGroupSet < 0) {
        $UserInEditGroupSet = UserInGroup("editbugs");
    }
    
    if ($UserInCanConfirmGroupSet < 0) {
        $UserInCanConfirmGroupSet = UserInGroup("canconfirm");
    }
    # END DO_NOT_CHANGE

    # If the user isn't allowed to change a field, we must tell him who can.
    # We store the required permission set into the $PrivilegesRequired
    # variable which gets passed to the error template.
    #
    # $PrivilegesRequired = 0 : no privileges required;
    # $PrivilegesRequired = 1 : the reporter, assignee or an empowered user;
    # $PrivilegesRequired = 2 : the assignee or an empowered user;
    # $PrivilegesRequired = 3 : an empowered user.

    # Allow anyone with "editbugs" privs to change anything.
    if ($UserInEditGroupSet) {
        return 1;
    }

    # *Only* users with "canconfirm" privs can confirm bugs.
    if ($field eq "canconfirm"
        || ($field eq "bug_status"
            && $oldvalue eq 'UNCONFIRMED'
            && IsOpenedState($newvalue)))
    {
        $PrivilegesRequired = 3;
        return $UserInCanConfirmGroupSet;
    }

    # START DO_NOT_CHANGE
    # $reporterid, $ownerid and $qacontactid are caches of the results of
    # the call to find out the assignee, reporter and qacontact of the current bug.
    if ($lastbugid != $bugid) {
        SendSQL("SELECT reporter, assigned_to, qa_contact FROM bugs
                 WHERE bug_id = $bugid");
        ($reporterid, $ownerid, $qacontactid) = (FetchSQLData());
        $lastbugid = $bugid;
    }    
    # END DO_NOT_CHANGE

    # Allow the assignee to change anything else.
    if ($ownerid == $whoid) {
        return 1;
    }
    
    # Allow the QA contact to change anything else.
    if (Param('useqacontact') && $qacontactid && ($qacontactid == $whoid)) {
        return 1;
    }
    
    # At this point, the user is either the reporter or an
    # unprivileged user. We first check for fields the reporter
    # is not allowed to change.

    # The reporter may not:
    # - reassign bugs, unless the bugs are assigned to him;
    #   in that case we will have already returned 1 above
    #   when checking for the assignee of the bug.
    if ($field eq "assigned_to") {
        $PrivilegesRequired = 2;
        return 0;
    }
    # - change the QA contact
    if ($field eq "qa_contact") {
        $PrivilegesRequired = 2;
        return 0;
    }
    # - change the target milestone
    if ($field eq "target_milestone") {
        $PrivilegesRequired = 2;
        return 0;
    }
    # - change the priority (unless he could have set it originally)
    if ($field eq "priority"
        && !Param('letsubmitterchoosepriority'))
    {
        $PrivilegesRequired = 2;
        return 0;
    }

    # The reporter is allowed to change anything else.
    if ($reporterid == $whoid) {
        return 1;
    }

    # If we haven't returned by this point, then the user doesn't
    # have the necessary permissions to change this field.
    $PrivilegesRequired = 1;
    return 0;
}

# Confirm that the reporter of the current bug can access the bug we are duping to.
sub DuplicateUserConfirm {
    # if we've already been through here, then exit
    if (defined $cgi->param('confirm_add_duplicate')) {
        return;
    }

    # Remember that we validated both these ids earlier, so we know
    # they are both valid bug ids
    my $dupe = $cgi->param('id');
    my $original = $cgi->param('dup_id');
    
    SendSQL("SELECT reporter FROM bugs WHERE bug_id = $dupe");
    my $reporter = FetchOneColumn();
    my $rep_user = Bugzilla::User->new($reporter);

    if ($rep_user->can_see_bug($original)) {
        $cgi->param('confirm_add_duplicate', '1');
        return;
    }

    SendSQL("SELECT cclist_accessible FROM bugs WHERE bug_id = $original");
    $vars->{'cclist_accessible'} = FetchOneColumn();
    
    # Once in this part of the subroutine, the user has not been auto-validated
    # and the duper has not chosen whether or not to add to CC list, so let's
    # ask the duper what he/she wants to do.
    
    $vars->{'original_bug_id'} = $original;
    $vars->{'duplicate_bug_id'} = $dupe;
    
    # Confirm whether or not to add the reporter to the cc: list
    # of the original bug (the one this bug is being duped against).
    print Bugzilla->cgi->header();
    $template->process("bug/process/confirm-duplicate.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
    exit;
}

if (defined $cgi->param('id')) {
    # since this means that we were called from show_bug.cgi, now is a good
    # time to do a whole bunch of error checking that can't easily happen when
    # we've been called from buglist.cgi, because buglist.cgi only tweaks
    # values that have been changed instead of submitting all the new values.
    # (XXX those error checks need to happen too, but implementing them 
    # is more work in the current architecture of this script...)
    check_field('product', scalar $cgi->param('product'), \@::legal_product);
    check_field('component', scalar $cgi->param('component'), 
                \@{$::components{$cgi->param('product')}});
    check_field('version', scalar $cgi->param('version'),
                \@{$::versions{$cgi->param('product')}});
    if ( Param("usetargetmilestone") ) {
        check_field('target_milestone', scalar $cgi->param('target_milestone'), 
                    \@{$::target_milestone{$cgi->param('product')}});
    }
    check_field('rep_platform', scalar $cgi->param('rep_platform'), \@::legal_platform);
    check_field('op_sys',       scalar $cgi->param('op_sys'),       \@::legal_opsys);
    check_field('priority',     scalar $cgi->param('priority'),     \@::legal_priority);
    check_field('bug_severity', scalar $cgi->param('bug_severity'), \@::legal_severity);

    # Those fields only have to exist. We don't validate their value here.
    foreach my $field_name ('bug_file_loc', 'short_desc', 'longdesclength') {
        defined($cgi->param($field_name))
          || ThrowCodeError('undefined_field', { field => $field_name });
    }
    $cgi->param('short_desc', clean_text($cgi->param('short_desc')));

    if (trim($cgi->param('short_desc')) eq "") {
        ThrowUserError("require_summary");
    }
}

my $action = trim($cgi->param('action') || '');

if ($action eq Param('move-button-text')) {
    Param('move-enabled') || ThrowUserError("move_bugs_disabled");

    $user->is_mover || ThrowUserError("auth_failure", {action => 'move',
                                                       object => 'bugs'});

    # Moved bugs are marked as RESOLVED MOVED.
    my $sth = $dbh->prepare("UPDATE bugs
                                SET bug_status = 'RESOLVED',
                                    resolution = 'MOVED',
                                    delta_ts = ?
                              WHERE bug_id = ?");
    # Bugs cannot be a dupe and moved at the same time.
    my $sth2 = $dbh->prepare("DELETE FROM duplicates WHERE dupe = ?");

    my $comment = "";
    if (defined $cgi->param('comment') && $cgi->param('comment') !~ /^\s*$/) {
        $comment = $cgi->param('comment') . "\n\n";
    }
    $comment .= "Bug moved to " . Param('move-to-url') . ".\n\n";
    $comment .= "If the move succeeded, " . $user->login . " will receive a mail\n";
    $comment .= "containing the number of the new bug in the other database.\n";
    $comment .= "If all went well,  please mark this bug verified, and paste\n";
    $comment .= "in a link to the new bug. Otherwise, reopen this bug.\n";

    $dbh->bz_lock_tables('bugs WRITE', 'bugs_activity WRITE', 'duplicates WRITE',
                         'longdescs WRITE', 'profiles READ', 'groups READ',
                         'bug_group_map READ', 'group_group_map READ',
                         'user_group_map READ', 'classifications READ',
                         'products READ', 'components READ', 'votes READ',
                         'cc READ', 'fielddefs READ');

    my $timestamp = $dbh->selectrow_array("SELECT NOW()");
    my @bugs;
    # First update all moved bugs.
    foreach my $id (@idlist) {
        my $bug = new Bugzilla::Bug($id, $whoid);
        push(@bugs, $bug);

        $sth->execute($timestamp, $id);
        $sth2->execute($id);

        AppendComment($id, $whoid, $comment, 0, $timestamp);

        if ($bug->bug_status ne 'RESOLVED') {
            LogActivityEntry($id, 'bug_status', $bug->bug_status,
                             'RESOLVED', $whoid, $timestamp);
        }
        if ($bug->resolution ne 'MOVED') {
            LogActivityEntry($id, 'resolution', $bug->resolution,
                             'MOVED', $whoid, $timestamp);
        }
    }
    $dbh->bz_unlock_tables();

    # Now send emails.
    foreach my $id (@idlist) {
        $vars->{'mailrecipients'} = { 'changer' => $user->login };
        $vars->{'id'} = $id;
        $vars->{'type'} = "move";

        $template->process("bug/process/results.html.tmpl", $vars)
          || ThrowTemplateError($template->error());
        $vars->{'header_done'} = 1;
    }
    # Prepare and send all data about these bugs to the new database
    my $to = Param('move-to-address');
    $to =~ s/@/\@/;
    my $from = Param('moved-from-address');
    $from =~ s/@/\@/;
    my $msg = "To: $to\n";
    $msg .= "From: Bugzilla <" . $from . ">\n";
    $msg .= "Subject: Moving bug(s) " . join(', ', @idlist) . "\n\n";

    my @fieldlist = (Bugzilla::Bug->fields, 'group', 'long_desc',
                     'attachment', 'attachmentdata');
    my %displayfields;
    foreach (@fieldlist) {
        $displayfields{$_} = 1;
    }

    $template->process("bug/show.xml.tmpl", { bugs => \@bugs,
                                              displayfields => \%displayfields,
                                            }, \$msg)
      || ThrowTemplateError($template->error());

    $msg .= "\n";
    Bugzilla::BugMail::MessageToMTA($msg);

    # End the response page.
    $template->process("bug/navigate.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
    $template->process("global/footer.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
    exit;
}


$::query = "update bugs\nset";
$::comma = "";
umask(0);

sub _remove_remaining_time {
    if (UserInGroup(Param('timetrackinggroup'))) {
        if ( defined $cgi->param('remaining_time') 
             && $cgi->param('remaining_time') > 0 )
        {
            $cgi->param('remaining_time', 0);
            $vars->{'message'} = "remaining_time_zeroed";
        }
    }
    else {
        DoComma();
        $::query .= "remaining_time = 0";
    }
}

sub DoComma {
    $::query .= "$::comma\n    ";
    $::comma = ",";
}

# $everconfirmed is used by ChangeStatus() to determine whether we are
# confirming the bug or not.
my $everconfirmed;
sub DoConfirm {
    if (CheckCanChangeField("canconfirm", scalar $cgi->param('id'), 0, 1)) {
        DoComma();
        $::query .= "everconfirmed = 1";
        $everconfirmed = 1;
    }
}

sub ChangeStatus {
    my ($str) = (@_);
    if (!$cgi->param('dontchange')
        || $str ne $cgi->param('dontchange')) {
        DoComma();
        if ($cgi->param('knob') eq 'reopen') {
            # When reopening, we need to check whether the bug was ever
            # confirmed or not
            $::query .= "bug_status = CASE WHEN everconfirmed = 1 THEN " .
                         SqlQuote($str) . " ELSE 'UNCONFIRMED' END";
        } elsif (IsOpenedState($str)) {
            # Note that we cannot combine this with the above branch - here we
            # need to check if bugs.bug_status is open, (since we don't want to
            # reopen closed bugs when reassigning), while above the whole point
            # is to reopen a closed bug.
            # Currently, the UI doesn't permit a user to reassign a closed bug
            # from the single bug page (only during a mass change), but they
            # could still hack the submit, so don't restrict this extended
            # check to the mass change page for safety/sanity/consistency
            # purposes.

            # The logic for this block is:
            # If the new state is open:
            #   If the old state was open
            #     If the bug was confirmed
            #       - move it to the new state
            #     Else
            #       - Set the state to unconfirmed
            #   Else
            #     - leave it as it was

            # This is valid only because 'reopen' is the only thing which moves
            # from closed to open, and its handled above
            # This also relies on the fact that confirming and accepting have
            # already called DoConfirm before this is called

            my @open_state = map(SqlQuote($_), OpenStates());
            my $open_state = join(", ", @open_state);

            # If we are changing everconfirmed to 1, we have to take this change
            # into account and the new bug status is given by $str.
            my $cond = SqlQuote($str);
            # If we are not setting everconfirmed, the new bug status depends on
            # the actual value of everconfirmed, which is bug-specific.
            unless ($everconfirmed) {
                $cond = "(CASE WHEN everconfirmed = 1 THEN " . $cond .
                        " ELSE 'UNCONFIRMED' END)";
            }
            $::query .= "bug_status = CASE WHEN bug_status IN($open_state) THEN " .
                                      $cond . " ELSE bug_status END";
        } else {
            $::query .= "bug_status = " . SqlQuote($str);
        }
        # If bugs are reassigned and their status is "UNCONFIRMED", they
        # should keep this status instead of "NEW" as suggested here.
        # This point is checked for each bug later in the code.
        $cgi->param('bug_status', $str);
    }
}

sub ChangeResolution {
    my ($str) = (@_);
    if (!$cgi->param('dontchange')
        || $str ne $cgi->param('dontchange'))
    {
        DoComma();
        $::query .= "resolution = " . SqlQuote($str);
        # We define this variable here so that customized installations
        # may set rules based on the resolution in CheckCanChangeField.
        $cgi->param('resolution', $str);
    }
}

# Changing this so that it will process groups from checkboxes instead of
# select lists.  This means that instead of looking for the bit-X values in
# the form, we need to loop through all the bug groups this user has access
# to, and for each one, see if it's selected.
# If the form element isn't present, or the user isn't in the group, leave
# it as-is

my @groupAdd = ();
my @groupDel = ();

SendSQL("SELECT groups.id, isactive FROM groups " .
        "WHERE id IN($grouplist) " .
        "AND isbuggroup = 1");
while (my ($b, $isactive) = FetchSQLData()) {
    # The multiple change page may not show all groups a bug is in
    # (eg product groups when listing more than one product)
    # Only consider groups which were present on the form. We can't do this
    # for single bug changes because non-checked checkboxes aren't present.
    # All the checkboxes should be shown in that case, though, so its not
    # an issue there
    if (defined $cgi->param('id') || defined $cgi->param("bit-$b")) {
        if (!$cgi->param("bit-$b")) {
            push(@groupDel, $b);
        } elsif ($cgi->param("bit-$b") == 1 && $isactive) {
            push(@groupAdd, $b);
        }
    }
}

foreach my $field ("rep_platform", "priority", "bug_severity",
                   "bug_file_loc", "short_desc", "version", "op_sys",
                   "target_milestone", "status_whiteboard") {
    if (defined $cgi->param($field)) {
        if (!$cgi->param('dontchange')
            || $cgi->param($field) ne $cgi->param('dontchange')) {
            DoComma();
            $::query .= "$field = " . SqlQuote(trim($cgi->param($field)));
        }
    }
}

# Add custom fields data to the query that will update the database.
foreach my $field (Bugzilla->custom_field_names) {
    if (defined $cgi->param($field)
        && (!$cgi->param('dontchange')
            || $cgi->param($field) ne $cgi->param('dontchange')))
    {
        DoComma();
        $::query .= "$field = " . SqlQuote(trim($cgi->param($field)));
    }
}


my $prod_id;
my $prod_changed;
my @newprod_ids;
if ($cgi->param('product') ne $cgi->param('dontchange')) {
    $prod_id = get_product_id($cgi->param('product'));
    $prod_id ||
      ThrowUserError("invalid_product_name", 
                     {product => $cgi->param('product')});
      
    DoComma();
    @newprod_ids = ($prod_id);
    $prod_changed = 1;
    $::query .= "product_id = $prod_id";
} else {
    @newprod_ids = @{$dbh->selectcol_arrayref("SELECT DISTINCT product_id
                                               FROM bugs 
                                               WHERE bug_id IN (" .
                                                   join(',', @idlist) . 
                                               ")")};
    if (scalar(@newprod_ids) == 1) {
        ($prod_id) = @newprod_ids;
    }
}

my $comp_id;
if ($cgi->param('component') ne $cgi->param('dontchange')) {
    if (scalar(@newprod_ids) > 1) {
        ThrowUserError("no_component_change_for_multiple_products");
    }
    $comp_id = get_component_id($prod_id,
                                $cgi->param('component'));
    $comp_id || ThrowCodeError("invalid_component", 
                               {name => $cgi->param('component'),
                                product => $cgi->param('product')});
    
    $cgi->param('component_id', $comp_id);
    DoComma();
    $::query .= "component_id = $comp_id";
}

# If this installation uses bug aliases, and the user is changing the alias,
# add this change to the query.
if (Param("usebugaliases") && defined $cgi->param('alias')) {
    my $alias = trim($cgi->param('alias'));
    
    # Since aliases are unique (like bug numbers), they can only be changed
    # for one bug at a time, so ignore the alias change unless only a single
    # bug is being changed.
    if (scalar(@idlist) == 1) {
        # Add the alias change to the query.  If the field contains the blank 
        # value, make the field be NULL to indicate that the bug has no alias.
        # Otherwise, if the field contains a value, update the record 
        # with that value.
        DoComma();
        $::query .= "alias = ";
        if ($alias ne "") {
            ValidateBugAlias($alias, $idlist[0]);
            $::query .= $dbh->quote($alias);
        } else {
            $::query .= "NULL";
        }
    }
}

# If the user is submitting changes from show_bug.cgi for a single bug,
# and that bug is restricted to a group, process the checkboxes that
# allowed the user to set whether or not the reporter
# and cc list can see the bug even if they are not members of all groups 
# to which the bug is restricted.
if (defined $cgi->param('id')) {
    SendSQL("SELECT group_id FROM bug_group_map WHERE bug_id = " .
            $cgi->param('id'));
    my ($havegroup) = FetchSQLData();
    if ( $havegroup ) {
        DoComma();
        $cgi->param('reporter_accessible',
                    $cgi->param('reporter_accessible') ? '1' : '0');
        $::query .= 'reporter_accessible = ' .
                    $cgi->param('reporter_accessible');

        DoComma();
        $cgi->param('cclist_accessible',
                    $cgi->param('cclist_accessible') ? '1' : '0');
        $::query .= 'cclist_accessible = ' . $cgi->param('cclist_accessible');
    }
}

if (defined $cgi->param('id') &&
    (Param("insidergroup") && UserInGroup(Param("insidergroup")))) {

    my $sth = $dbh->prepare('UPDATE longdescs SET isprivate = ?
                             WHERE bug_id = ? AND bug_when = ?');

    foreach my $field ($cgi->param()) {
        if ($field =~ /when-([0-9]+)/) {
            my $sequence = $1;
            my $private = $cgi->param("isprivate-$sequence") ? 1 : 0 ;
            if ($private != $cgi->param("oisprivate-$sequence")) {
                my $field_data = $cgi->param("$field");
                # Make sure a valid date is given.
                $field_data = format_time($field_data, '%Y-%m-%d %T');
                $sth->execute($private, $cgi->param('id'), $field_data);
            }
        }

    }
}

my $duplicate = 0;

# We need to check the addresses involved in a CC change before we touch any bugs.
# What we'll do here is formulate the CC data into two hashes of ID's involved
# in this CC change.  Then those hashes can be used later on for the actual change.
my (%cc_add, %cc_remove);
if (defined $cgi->param('newcc')
    || defined $cgi->param('addselfcc')
    || defined $cgi->param('removecc')
    || defined $cgi->param('masscc')) {
    # If masscc is defined, then we came from buglist and need to either add or
    # remove cc's... otherwise, we came from bugform and may need to do both.
    my ($cc_add, $cc_remove) = "";
    if (defined $cgi->param('masscc')) {
        if ($cgi->param('ccaction') eq 'add') {
            $cc_add = join(' ',$cgi->param('masscc'));
        } elsif ($cgi->param('ccaction') eq 'remove') {
            $cc_remove = join(' ',$cgi->param('masscc'));
        }
    } else {
        $cc_add = join(' ',$cgi->param('newcc'));
        # We came from bug_form which uses a select box to determine what cc's
        # need to be removed...
        if (defined $cgi->param('removecc') && $cgi->param('cc')) {
            $cc_remove = join (",", $cgi->param('cc'));
        }
    }

    if ($cc_add) {
        $cc_add =~ s/[\s,]+/ /g; # Change all delimiters to a single space
        foreach my $person ( split(" ", $cc_add) ) {
            my $pid = DBNameToIdAndCheck($person);
            $cc_add{$pid} = $person;
        }
    }
    if ($cgi->param('addselfcc')) {
        $cc_add{$whoid} = $user->login;
    }
    if ($cc_remove) {
        $cc_remove =~ s/[\s,]+/ /g; # Change all delimiters to a single space
        foreach my $person ( split(" ", $cc_remove) ) {
            my $pid = DBNameToIdAndCheck($person);
            $cc_remove{$pid} = $person;
        }
    }
}

# Store the new assignee and QA contact IDs (if any). This is the
# only way to keep these informations when bugs are reassigned by
# component as $cgi->param('assigned_to') and $cgi->param('qa_contact')
# are not the right fields to look at.
# If the assignee or qacontact is changed, the new one is checked when
# changed information is validated.  If not, then the unchanged assignee
# or qacontact may have to be validated later.

my $assignee;
my $qacontact;
my $qacontact_checked = 0;
my $assignee_checked = 0;

my %usercache = ();

if (defined $cgi->param('qa_contact')
    && $cgi->param('knob') ne "reassignbycomponent")
{
    my $name = trim($cgi->param('qa_contact'));
    # The QA contact cannot be deleted from show_bug.cgi for a single bug!
    if ($name ne $cgi->param('dontchange')) {
        $qacontact = DBNameToIdAndCheck($name) if ($name ne "");
        if ($qacontact && Param("strict_isolation")) {
                $usercache{$qacontact} ||= Bugzilla::User->new($qacontact);
                my $qa_user = $usercache{$qacontact};
                foreach my $product_id (@newprod_ids) {
                    if (!$qa_user->can_edit_product($product_id)) {
                        my $product_name = get_product_name($product_id);
                        ThrowUserError('invalid_user_group',
                                          {'users'   => $qa_user->login,
                                           'product' => $product_name,
                                           'bug_id' => (scalar(@idlist) > 1)
                                                         ? undef : $idlist[0]
                                          });
                    }
                }
        }
        $qacontact_checked = 1;
        DoComma();
        if($qacontact) {
            $::query .= "qa_contact = $qacontact";
        }
        else {
            $::query .= "qa_contact = NULL";
        }
    }
}

SWITCH: for ($cgi->param('knob')) {
    /^none$/ && do {
        last SWITCH;
    };
    /^confirm$/ && CheckonComment( "confirm" ) && do {
        DoConfirm();
        ChangeStatus('NEW');
        last SWITCH;
    };
    /^accept$/ && CheckonComment( "accept" ) && do {
        DoConfirm();
        ChangeStatus('ASSIGNED');
        if (Param("usetargetmilestone") && Param("musthavemilestoneonaccept")) {
            $requiremilestone = 1;
        }
        last SWITCH;
    };
    /^clearresolution$/ && CheckonComment( "clearresolution" ) && do {
        ChangeResolution('');
        last SWITCH;
    };
    /^resolve$/ && CheckonComment( "resolve" ) && do {
        # Check here, because its the only place we require the resolution
        check_field('resolution', scalar $cgi->param('resolution'),
                    \@::settable_resolution);

        # don't resolve as fixed while still unresolved blocking bugs
        if (Param("noresolveonopenblockers")
            && $cgi->param('resolution') eq 'FIXED')
        {
            my @dependencies = Bugzilla::Bug::CountOpenDependencies(@idlist);
            if (scalar @dependencies > 0) {
                ThrowUserError("still_unresolved_bugs",
                               { dependencies     => \@dependencies,
                                 dependency_count => scalar @dependencies });
            }
        }

        # RESOLVED bugs should have no time remaining;
        # more time can be added for the VERIFY step, if needed.
        _remove_remaining_time();

        ChangeStatus('RESOLVED');
        ChangeResolution($cgi->param('resolution'));
        last SWITCH;
    };
    /^reassign$/ && CheckonComment( "reassign" ) && do {
        if ($cgi->param('andconfirm')) {
            DoConfirm();
        }
        ChangeStatus('NEW');
        DoComma();
        if (defined $cgi->param('assigned_to')
            && trim($cgi->param('assigned_to')) ne "") { 
            $assignee = DBNameToIdAndCheck(trim($cgi->param('assigned_to')));
            if (Param("strict_isolation")) {
                $usercache{$assignee} ||= Bugzilla::User->new($assignee);
                my $assign_user = $usercache{$assignee};
                foreach my $product_id (@newprod_ids) {
                    if (!$assign_user->can_edit_product($product_id)) {
                        my $product_name = get_product_name($product_id);
                        ThrowUserError('invalid_user_group',
                                          {'users'   => $assign_user->login,
                                           'product' => $product_name,
                                           'bug_id' => (scalar(@idlist) > 1)
                                                         ? undef : $idlist[0]
                                          });
                    }
                }
            }
        } else {
            ThrowUserError("reassign_to_empty");
        }
        $assignee_checked = 1;
        $::query .= "assigned_to = $assignee";
        last SWITCH;
    };
    /^reassignbycomponent$/  && CheckonComment( "reassignbycomponent" ) && do {
        if ($cgi->param('compconfirm')) {
            DoConfirm();
        }
        ChangeStatus('NEW');
        last SWITCH;
    };
    /^reopen$/  && CheckonComment( "reopen" ) && do {
        ChangeStatus('REOPENED');
        ChangeResolution('');
        last SWITCH;
    };
    /^verify$/ && CheckonComment( "verify" ) && do {
        ChangeStatus('VERIFIED');
        last SWITCH;
    };
    /^close$/ && CheckonComment( "close" ) && do {
        # CLOSED bugs should have no time remaining.
        _remove_remaining_time();

        ChangeStatus('CLOSED');
        last SWITCH;
    };
    /^duplicate$/ && CheckonComment( "duplicate" ) && do {
        # You cannot mark bugs as duplicates when changing
        # several bugs at once.
        unless (defined $cgi->param('id')) {
            ThrowUserError('dupe_not_allowed');
        }

        # Make sure we can change the original bug (issue A on bug 96085)
        defined($cgi->param('dup_id'))
          || ThrowCodeError('undefined_field', { field => 'dup_id' });

        $duplicate = $cgi->param('dup_id');
        ValidateBugID($duplicate, 'dup_id');
        $cgi->param('dup_id', $duplicate);

        # Make sure the bug is not already marked as a dupe
        # (may appear in race condition)
        my $dupe_of =
            $dbh->selectrow_array("SELECT dupe_of FROM duplicates
                                   WHERE dupe = ?",
                                   undef, $cgi->param('id'));
        if ($dupe_of) {
            ThrowUserError("dupe_entry_found", { dupe_of => $dupe_of });
        }

        # Make sure a loop isn't created when marking this bug
        # as duplicate.
        my %dupes;
        $dupe_of = $duplicate;
        my $sth = $dbh->prepare('SELECT dupe_of FROM duplicates
                                 WHERE dupe = ?');

        while ($dupe_of) {
            if ($dupe_of == $cgi->param('id')) {
                ThrowUserError('dupe_loop_detected', { bug_id  => $cgi->param('id'),
                                                       dupe_of => $duplicate });
            }
            # If $dupes{$dupe_of} is already set to 1, then a loop
            # already exists which does not involve this bug.
            # As the user is not responsible for this loop, do not
            # prevent him from marking this bug as a duplicate.
            last if exists $dupes{"$dupe_of"};
            $dupes{"$dupe_of"} = 1;
            $sth->execute($dupe_of);
            $dupe_of = $sth->fetchrow_array;
        }

        # Also, let's see if the reporter has authorization to see
        # the bug to which we are duping. If not we need to prompt.
        DuplicateUserConfirm();

        # DUPLICATE bugs should have no time remaining.
        _remove_remaining_time();

        ChangeStatus('RESOLVED');
        ChangeResolution('DUPLICATE');
        my $comment = $cgi->param('comment');
        $comment .= "\n\n*** This bug has been marked " .
                    "as a duplicate of bug $duplicate ***";
        $cgi->param('comment', $comment);
        last SWITCH;
    };

    ThrowCodeError("unknown_action", { action => $cgi->param('knob') });
}

my @keywordlist;
my %keywordseen;

if (defined $cgi->param('keywords')) {
    foreach my $keyword (split(/[\s,]+/, $cgi->param('keywords'))) {
        if ($keyword eq '') {
            next;
        }
        my $i = GetKeywordIdFromName($keyword);
        if (!$i) {
            ThrowUserError("unknown_keyword",
                           { keyword => $keyword });
        }
        if (!$keywordseen{$i}) {
            push(@keywordlist, $i);
            $keywordseen{$i} = 1;
        }
    }
}

my $keywordaction = $cgi->param('keywordaction') || "makeexact";
if (!grep($keywordaction eq $_, qw(add delete makeexact))) {
    $keywordaction = "makeexact";
}

if ($::comma eq ""
    && (! @groupAdd) && (! @groupDel)
    && (! @::legal_keywords || (0 == @keywordlist && $keywordaction ne "makeexact"))
    && defined $cgi->param('masscc') && ! $cgi->param('masscc')
    ) {
    if (!defined $cgi->param('comment') || $cgi->param('comment') =~ /^\s*$/) {
        ThrowUserError("bugs_not_changed");
    }
}

# Process data for Time Tracking fields
if (UserInGroup(Param('timetrackinggroup'))) {
    foreach my $field ("estimated_time", "remaining_time") {
        if (defined $cgi->param($field)) {
            my $er_time = trim($cgi->param($field));
            if ($er_time ne $cgi->param('dontchange')) {
                DoComma();
                $::query .= "$field = " . SqlQuote($er_time);
            }
        }
    }

    if (defined $cgi->param('deadline')) {
        DoComma();
        $::query .= "deadline = ";
        if ($cgi->param('deadline')) {
            validate_date($cgi->param('deadline'))
              || ThrowUserError('illegal_date', {date => $cgi->param('deadline'),
                                                 format => 'YYYY-MM-DD'});
            $::query .= SqlQuote($cgi->param('deadline'));
        } else {
            $::query .= "NULL" ;
        }
    }
}

my $basequery = $::query;
my $delta_ts;


sub SnapShotBug {
    my ($id) = (@_);
    SendSQL("SELECT delta_ts, " . join(',', @::log_columns) .
            " FROM bugs WHERE bug_id = $id");
    my @row = FetchSQLData();
    $delta_ts = shift @row;

    return @row;
}


sub SnapShotDeps {
    my ($i, $target, $me) = (@_);
    SendSQL("SELECT $target FROM dependencies WHERE $me = $i ORDER BY $target");
    my @list;
    while (MoreSQLData()) {
        push(@list, FetchOneColumn());
    }
    return join(',', @list);
}


my $timestamp;
my $bug_changed;

sub LogDependencyActivity {
    my ($i, $oldstr, $target, $me, $timestamp) = (@_);
    my $sql_timestamp = SqlQuote($timestamp);
    my $newstr = SnapShotDeps($i, $target, $me);
    if ($oldstr ne $newstr) {
        # Figure out what's really different...
        my ($removed, $added) = diff_strings($oldstr, $newstr);
        LogActivityEntry($i,$target,$removed,$added,$whoid,$timestamp);
        # update timestamp on target bug so midairs will be triggered
        SendSQL("UPDATE bugs SET delta_ts = $sql_timestamp WHERE bug_id = $i");
        $bug_changed = 1;
        return 1;
    }
    return 0;
}

if (Param("strict_isolation")) {
    my @blocked_cc = ();
    foreach my $pid (keys %cc_add) {
        $usercache{$pid} ||= Bugzilla::User->new($pid);
        my $cc_user = $usercache{$pid};
        foreach my $product_id (@newprod_ids) {
            if (!$cc_user->can_edit_product($product_id)) {
                push (@blocked_cc, $cc_user->login);
                last;
            }
        }
    }
    if (scalar(@blocked_cc)) {
        ThrowUserError("invalid_user_group", 
            {'users' => \@blocked_cc,
             'bug_id' => (scalar(@idlist) > 1) ? undef : $idlist[0]});
    }
}

if ($prod_changed && Param("strict_isolation")) {
    my $sth_cc = $dbh->prepare("SELECT who
                                FROM cc
                                WHERE bug_id = ?");
    my $sth_bug = $dbh->prepare("SELECT assigned_to, qa_contact
                                 FROM bugs
                                 WHERE bug_id = ?");
    my $prod_name = get_product_name($prod_id);
    foreach my $id (@idlist) {
        $sth_cc->execute($id);
        my @blocked_cc = ();
        while (my ($pid) = $sth_cc->fetchrow_array) {
            $usercache{$pid} ||= Bugzilla::User->new($pid);
            my $cc_user = $usercache{$pid};
            if (!$cc_user->can_edit_product($prod_id)) {
                push (@blocked_cc, $cc_user->login);
            }
        }
        if (scalar(@blocked_cc)) {
            ThrowUserError('invalid_user_group',
                              {'users'   => \@blocked_cc,
                               'bug_id' => $id,
                               'product' => $prod_name});
        }
        $sth_bug->execute($id);
        my ($assignee, $qacontact) = $sth_bug->fetchrow_array;
        if (!$assignee_checked) {
            $usercache{$assignee} ||= Bugzilla::User->new($assignee);
            my $assign_user = $usercache{$assignee};
            if (!$assign_user->can_edit_product($prod_id)) {
                    ThrowUserError('invalid_user_group',
                                      {'users'   => $assign_user->login,
                                       'bug_id' => $id,
                                       'product' => $prod_name});
            }
        }
        if (!$qacontact_checked && $qacontact) {
            $usercache{$qacontact} ||= Bugzilla::User->new($qacontact);
            my $qa_user = $usercache{$qacontact};
            if (!$qa_user->can_edit_product($prod_id)) {
                    ThrowUserError('invalid_user_group',
                                      {'users'   => $qa_user->login,
                                       'bug_id' => $id,
                                       'product' => $prod_name});
            }
        }
    }
}


# This loop iterates once for each bug to be processed (i.e. all the
# bugs selected when this script is called with multiple bugs selected
# from buglist.cgi, or just the one bug when called from
# show_bug.cgi).
#
foreach my $id (@idlist) {
    my $query = $basequery;
    my $bug_obj = new Bugzilla::Bug($id, $whoid);

    if ($cgi->param('knob') eq 'reassignbycomponent') {
        # We have to check whether the bug is moved to another product
        # and/or component before reassigning. If $comp_id is defined,
        # use it; else use the product/component the bug is already in.
        my $new_comp_id = $comp_id || $bug_obj->{'component_id'};
        $assignee = $dbh->selectrow_array('SELECT initialowner
                                           FROM components
                                           WHERE components.id = ?',
                                           undef, $new_comp_id);
        $query .= ", assigned_to = $assignee";
        if (Param("useqacontact")) {
            $qacontact = $dbh->selectrow_array('SELECT initialqacontact
                                                FROM components
                                                WHERE components.id = ?',
                                                undef, $new_comp_id);
            if ($qacontact) {
                $query .= ", qa_contact = $qacontact";
            }
            else {
                $query .= ", qa_contact = NULL";
            }
        }
    }

    my %dependencychanged;
    $bug_changed = 0;
    my $write = "WRITE";        # Might want to make a param to control
                                # whether we do LOW_PRIORITY ...
    $dbh->bz_lock_tables("bugs $write", "bugs_activity $write",
            "cc $write", "cc AS selectVisible_cc $write",
            "profiles READ", "dependencies $write", "votes $write",
            "products READ", "components READ",
            "keywords $write", "longdescs $write", "fielddefs $write",
            "bug_group_map $write", "flags $write", "duplicates $write",
            "user_group_map READ", "group_group_map READ", "flagtypes READ",
            "flaginclusions AS i READ", "flagexclusions AS e READ",
            "keyworddefs READ", "groups READ", "attachments READ",
            "group_control_map AS oldcontrolmap READ",
            "group_control_map AS newcontrolmap READ",
            "group_control_map READ", "email_setting READ");

    # It may sound crazy to set %formhash for each bug as $cgi->param()
    # will not change, but %formhash is modified below and we prefer
    # to set it again.
    my $i = 0;
    my @oldvalues = SnapShotBug($id);
    my %oldhash;
    my %formhash;
    foreach my $col (@::log_columns) {
        # Consider NULL db entries to be equivalent to the empty string
        $oldvalues[$i] = defined($oldvalues[$i]) ? $oldvalues[$i] : '';
        # Convert the deadline taken from the DB into the YYYY-MM-DD format
        # for consistency with the deadline provided by the user, if any.
        # Else CheckCanChangeField() would see them as different in all cases.
        if ($col eq 'deadline') {
            $oldvalues[$i] = format_time($oldvalues[$i], "%Y-%m-%d");
        }
        $oldhash{$col} = $oldvalues[$i];
        $formhash{$col} = $cgi->param($col) if defined $cgi->param($col);
        $i++;
    }
    # If the user is reassigning bugs, we need to:
    # - convert $newhash{'assigned_to'} and $newhash{'qa_contact'}
    #   email addresses into their corresponding IDs;
    # - update $newhash{'bug_status'} to its real state if the bug
    #   is in the unconfirmed state.
    $formhash{'qa_contact'} = $qacontact if Param('useqacontact');
    if ($cgi->param('knob') eq 'reassignbycomponent'
        || $cgi->param('knob') eq 'reassign') {
        $formhash{'assigned_to'} = $assignee;
        if ($oldhash{'bug_status'} eq 'UNCONFIRMED') {
            $formhash{'bug_status'} = $oldhash{'bug_status'};
        }
    }
    foreach my $col (@::log_columns) {
        if (exists $formhash{$col}
            && !CheckCanChangeField($col, $id, $oldhash{$col}, $formhash{$col}))
        {
            my $vars;
            if ($col eq 'component_id') {
                # Display the component name
                $vars->{'oldvalue'} = get_component_name($oldhash{$col});
                $vars->{'newvalue'} = $cgi->param('component');
                $vars->{'field'} = 'component';
            } elsif ($col eq 'assigned_to' || $col eq 'qa_contact') {
                # Display the assignee or QA contact email address
                $vars->{'oldvalue'} = DBID_to_name($oldhash{$col});
                $vars->{'newvalue'} = DBID_to_name($formhash{$col});
                $vars->{'field'} = $col;
            } else {
                $vars->{'oldvalue'} = $oldhash{$col};
                $vars->{'newvalue'} = $formhash{$col};
                $vars->{'field'} = $col;
            }
            $vars->{'privs'} = $PrivilegesRequired;
            ThrowUserError("illegal_change", $vars);
        }
    }
    
    # When editing multiple bugs, users can specify a list of keywords to delete
    # from bugs.  If the list matches the current set of keywords on those bugs,
    # CheckCanChangeField above will fail to check permissions because it thinks
    # the list hasn't changed.  To fix that, we have to call CheckCanChangeField
    # again with old!=new if the keyword action is "delete" and old=new.
    if ($keywordaction eq "delete"
        && defined $cgi->param('keywords')
        && length(@keywordlist) > 0
        && $cgi->param('keywords') eq $oldhash{keywords}
        && !CheckCanChangeField("keywords", $id, "old is not", "equal to new"))
    {
        $vars->{'oldvalue'} = $oldhash{keywords};
        $vars->{'newvalue'} = "no keywords";
        $vars->{'field'} = "keywords";
        $vars->{'privs'} = $PrivilegesRequired;
        ThrowUserError("illegal_change", $vars);
    }

    $oldhash{'product'} = get_product_name($oldhash{'product_id'});
    if (!Bugzilla->user->can_edit_product($oldhash{'product_id'})) {
        ThrowUserError("product_edit_denied",
                      { product => $oldhash{'product'} });
    }

    if ($requiremilestone) {
        # musthavemilestoneonaccept applies only if at least two
        # target milestones are defined for the current product.
        my $nb_milestones = scalar(@{$::target_milestone{$oldhash{'product'}}});
        if ($nb_milestones > 1) {
            my $value = $cgi->param('target_milestone');
            if (!defined $value || $value eq $cgi->param('dontchange')) {
                $value = $oldhash{'target_milestone'};
            }
            my $defaultmilestone =
                $dbh->selectrow_array("SELECT defaultmilestone
                                       FROM products WHERE id = ?",
                                       undef, $oldhash{'product_id'});
            # if musthavemilestoneonaccept == 1, then the target
            # milestone must be different from the default one.
            if ($value eq $defaultmilestone) {
                ThrowUserError("milestone_required", { bug_id => $id });
            }
        }
    }   
    if (defined $cgi->param('delta_ts') && $cgi->param('delta_ts') ne $delta_ts)
    {
        ($vars->{'operations'}) =
            Bugzilla::Bug::GetBugActivity($id, $cgi->param('delta_ts'));

        $vars->{'start_at'} = $cgi->param('longdesclength');

        # Always sort midair collision comments oldest to newest,
        # regardless of the user's personal preference.
        $vars->{'comments'} = Bugzilla::Bug::GetComments($id, "oldest_to_newest");

        $cgi->param('delta_ts', $delta_ts);
        
        $vars->{'bug_id'} = $id;
        
        $dbh->bz_unlock_tables(UNLOCK_ABORT);
        
        # Warn the user about the mid-air collision and ask them what to do.
        $template->process("bug/process/midair.html.tmpl", $vars)
          || ThrowTemplateError($template->error());
        exit;
    }

    # Gather the dependency list, and make sure there are no circular refs
    my %deps = Bugzilla::Bug::ValidateDependencies(scalar($cgi->param('dependson')),
                                                   scalar($cgi->param('blocked')),
                                                   $id);

    #
    # Start updating the relevant database entries
    #

    SendSQL("select now()");
    $timestamp = FetchOneColumn();
    my $sql_timestamp = SqlQuote($timestamp);

    my $work_time;
    if (UserInGroup(Param('timetrackinggroup'))) {
        $work_time = $cgi->param('work_time');
        if ($work_time) {
            # AppendComment (called below) can in theory raise an error,
            # but because we've already validated work_time here it's
            # safe to log the entry before adding the comment.
            LogActivityEntry($id, "work_time", "", $work_time,
                             $whoid, $timestamp);
        }
    }

    if ($cgi->param('comment') || $work_time) {
        AppendComment($id, $whoid, scalar($cgi->param('comment')),
                      scalar($cgi->param('commentprivacy')), $timestamp, $work_time);
        $bug_changed = 1;
    }

    if (@::legal_keywords && defined $cgi->param('keywords')) {
        # There are three kinds of "keywordsaction": makeexact, add, delete.
        # For makeexact, we delete everything, and then add our things.
        # For add, we delete things we're adding (to make sure we don't
        # end up having them twice), and then we add them.
        # For delete, we just delete things on the list.
        my $changed = 0;
        if ($keywordaction eq "makeexact") {
            SendSQL("DELETE FROM keywords WHERE bug_id = $id");
            $changed = 1;
        }
        foreach my $keyword (@keywordlist) {
            if ($keywordaction ne "makeexact") {
                SendSQL("DELETE FROM keywords
                         WHERE bug_id = $id AND keywordid = $keyword");
                $changed = 1;
            }
            if ($keywordaction ne "delete") {
                SendSQL("INSERT INTO keywords 
                         (bug_id, keywordid) VALUES ($id, $keyword)");
                $changed = 1;
            }
        }
        if ($changed) {
            SendSQL("SELECT keyworddefs.name 
                     FROM keyworddefs INNER JOIN keywords
                       ON keyworddefs.id = keywords.keywordid
                     WHERE keywords.bug_id = $id
                     ORDER BY keyworddefs.name");
            my @list;
            while (MoreSQLData()) {
                push(@list, FetchOneColumn());
            }
            $dbh->do("UPDATE bugs SET keywords = ? WHERE bug_id = ?",
                     undef, join(', ', @list), $id);
        }
    }
    $query .= " where bug_id = $id";

    if ($::comma ne "") {
        SendSQL($query);
    }

    # Check for duplicates if the bug is [re]open
    SendSQL("SELECT resolution FROM bugs WHERE bug_id = $id");
    my $resolution = FetchOneColumn();
    if ($resolution eq '') {
        SendSQL("DELETE FROM duplicates WHERE dupe = $id");
    }
    
    my $newproduct_id = $oldhash{'product_id'};
    if ($cgi->param('product') ne $cgi->param('dontchange')) {
        my $newproduct_id = get_product_id($cgi->param('product'));
    }

    my %groupsrequired = ();
    my %groupsforbidden = ();
    SendSQL("SELECT id, membercontrol 
             FROM groups LEFT JOIN group_control_map
             ON id = group_id
             AND product_id = $newproduct_id WHERE isactive != 0");
    while (MoreSQLData()) {
        my ($group, $control) = FetchSQLData();
        $control ||= 0;
        unless ($control > &::CONTROLMAPNA)  {
            $groupsforbidden{$group} = 1;
        }
        if ($control == &::CONTROLMAPMANDATORY) {
            $groupsrequired{$group} = 1;
        }
    }

    my @groupAddNames = ();
    my @groupAddNamesAll = ();
    foreach my $grouptoadd (@groupAdd, keys %groupsrequired) {
        next if $groupsforbidden{$grouptoadd};
        push(@groupAddNamesAll, GroupIdToName($grouptoadd));
        if (!BugInGroupId($id, $grouptoadd)) {
            push(@groupAddNames, GroupIdToName($grouptoadd));
            SendSQL("INSERT INTO bug_group_map (bug_id, group_id) 
                     VALUES ($id, $grouptoadd)");
        }
    }
    my @groupDelNames = ();
    my @groupDelNamesAll = ();
    foreach my $grouptodel (@groupDel, keys %groupsforbidden) {
        push(@groupDelNamesAll, GroupIdToName($grouptodel));
        next if $groupsrequired{$grouptodel};
        if (BugInGroupId($id, $grouptodel)) {
            push(@groupDelNames, GroupIdToName($grouptodel));
        }
        SendSQL("DELETE FROM bug_group_map 
                 WHERE bug_id = $id AND group_id = $grouptodel");
    }

    my $groupDelNames = join(',', @groupDelNames);
    my $groupAddNames = join(',', @groupAddNames);

    if ($groupDelNames ne $groupAddNames) {
        LogActivityEntry($id, "bug_group", $groupDelNames, $groupAddNames,
                         $whoid, $timestamp); 
        $bug_changed = 1;
    }

    my @ccRemoved = (); 
    if (defined $cgi->param('newcc')
        || defined $cgi->param('addselfcc')
        || defined $cgi->param('removecc')
        || defined $cgi->param('masscc')) {
        # Get the current CC list for this bug
        my %oncc;
        SendSQL("SELECT who FROM cc WHERE bug_id = $id");
        while (MoreSQLData()) {
            $oncc{FetchOneColumn()} = 1;
        }

        my (@added, @removed) = ();
 
        foreach my $pid (keys %cc_add) {
            # If this person isn't already on the cc list, add them
            if (! $oncc{$pid}) {
                SendSQL("INSERT INTO cc (bug_id, who) VALUES ($id, $pid)");
                push (@added, $cc_add{$pid});
                $oncc{$pid} = 1;
            }
        }
        foreach my $pid (keys %cc_remove) {
            # If the person is on the cc list, remove them
            if ($oncc{$pid}) {
                SendSQL("DELETE FROM cc WHERE bug_id = $id AND who = $pid");
                push (@removed, $cc_remove{$pid});
                $oncc{$pid} = 0;
            }
        }

        # If any changes were found, record it in the activity log
        if (scalar(@removed) || scalar(@added)) {
            my $removed = join(", ", @removed);
            my $added = join(", ", @added);
            LogActivityEntry($id,"cc",$removed,$added,$whoid,$timestamp);
            $bug_changed = 1;
        }
        @ccRemoved = @removed;
    }

    # We need to send mail for dependson/blocked bugs if the dependencies
    # change or the status or resolution change. This var keeps track of that.
    my $check_dep_bugs = 0;

    foreach my $pair ("blocked/dependson", "dependson/blocked") {
        my ($me, $target) = split("/", $pair);

        my @oldlist = @{$dbh->selectcol_arrayref("SELECT $target FROM dependencies
                                                  WHERE $me = ? ORDER BY $target",
                                                  undef, $id)};
        @dependencychanged{@oldlist} = 1;

        if (defined $cgi->param($target)) {
            my %snapshot;
            my @newlist = sort {$a <=> $b} @{$deps{$target}};
            @dependencychanged{@newlist} = 1;

            while (0 < @oldlist || 0 < @newlist) {
                if (@oldlist == 0 || (@newlist > 0 &&
                                      $oldlist[0] > $newlist[0])) {
                    $snapshot{$newlist[0]} = SnapShotDeps($newlist[0], $me,
                                                          $target);
                    shift @newlist;
                } elsif (@newlist == 0 || (@oldlist > 0 &&
                                           $newlist[0] > $oldlist[0])) {
                    $snapshot{$oldlist[0]} = SnapShotDeps($oldlist[0], $me,
                                                          $target);
                    shift @oldlist;
                } else {
                    if ($oldlist[0] != $newlist[0]) {
                        $dbh->bz_unlock_tables(UNLOCK_ABORT);
                        die "Error in list comparing code";
                    }
                    shift @oldlist;
                    shift @newlist;
                }
            }
            my @keys = keys(%snapshot);
            if (@keys) {
                my $oldsnap = SnapShotDeps($id, $target, $me);
                SendSQL("delete from dependencies where $me = $id");
                foreach my $i (@{$deps{$target}}) {
                    SendSQL("insert into dependencies ($me, $target) values ($id, $i)");
                }
                foreach my $k (@keys) {
                    LogDependencyActivity($k, $snapshot{$k}, $me, $target, $timestamp);
                }
                LogDependencyActivity($id, $oldsnap, $target, $me, $timestamp);
                $check_dep_bugs = 1;
            }
        }
    }

    # When a bug changes products and the old or new product is associated
    # with a bug group, it may be necessary to remove the bug from the old
    # group or add it to the new one.  There are a very specific series of
    # conditions under which these activities take place, more information
    # about which can be found in comments within the conditionals below.
    # Check if the user has changed the product to which the bug belongs;
    if ($cgi->param('product') ne $cgi->param('dontchange')
        && $cgi->param('product') ne $oldhash{'product'}
    ) {
        $newproduct_id = get_product_id($cgi->param('product'));
        # Depending on the "addtonewgroup" variable, groups with
        # defaults will change.
        #
        # For each group, determine
        # - The group id and if it is active
        # - The control map value for the old product and this group
        # - The control map value for the new product and this group
        # - Is the user in this group?
        # - Is the bug in this group?
        SendSQL("SELECT DISTINCT groups.id, isactive, " .
                "oldcontrolmap.membercontrol, newcontrolmap.membercontrol, " .
                "CASE WHEN groups.id IN ($grouplist) THEN 1 ELSE 0 END, " .
                "CASE WHEN bug_group_map.group_id IS NOT NULL " .
                "THEN 1 ELSE 0 END " .
                "FROM groups " .
                "LEFT JOIN group_control_map AS oldcontrolmap " .
                "ON oldcontrolmap.group_id = groups.id " .
                "AND oldcontrolmap.product_id = " . $oldhash{'product_id'} .
                " LEFT JOIN group_control_map AS newcontrolmap " .
                "ON newcontrolmap.group_id = groups.id " .
                "AND newcontrolmap.product_id = $newproduct_id " .
                "LEFT JOIN bug_group_map " .
                "ON bug_group_map.group_id = groups.id " .
                "AND bug_group_map.bug_id = $id "
            );
        my @groupstoremove = ();
        my @groupstoadd = ();
        my @defaultstoremove = ();
        my @defaultstoadd = ();
        my @allgroups = ();
        my $buginanydefault = 0;
        my $buginanychangingdefault = 0;
        while (MoreSQLData()) {
            my ($groupid, $isactive, $oldcontrol, $newcontrol, 
            $useringroup, $bugingroup) = FetchSQLData();
            # An undefined newcontrol is none.
            $newcontrol = CONTROLMAPNA unless $newcontrol;
            $oldcontrol = CONTROLMAPNA unless $oldcontrol;
            push(@allgroups, $groupid);
            if (($bugingroup) && ($isactive)
                && ($oldcontrol == CONTROLMAPDEFAULT)) {
                # Bug was in a default group.
                $buginanydefault = 1;
                if (($newcontrol != CONTROLMAPDEFAULT)
                    && ($newcontrol != CONTROLMAPMANDATORY)) {
                    # Bug was in a default group that no longer is.
                    $buginanychangingdefault = 1;
                    push (@defaultstoremove, $groupid);
                }
            }
            if (($isactive) && (!$bugingroup)
                && ($newcontrol == CONTROLMAPDEFAULT)
                && ($useringroup)) {
                push (@defaultstoadd, $groupid);
            }
            if (($bugingroup) && ($isactive) && ($newcontrol == CONTROLMAPNA)) {
                # Group is no longer permitted.
                push(@groupstoremove, $groupid);
            }
            if ((!$bugingroup) && ($isactive) 
                && ($newcontrol == CONTROLMAPMANDATORY)) {
                # Group is now required.
                push(@groupstoadd, $groupid);
            }
        }
        # If addtonewgroups = "yes", old default groups will be removed
        # and new default groups will be added.
        # If addtonewgroups = "yesifinold", old default groups will be removed
        # and new default groups will be added only if the bug was in ANY
        # of the old default groups.
        # If addtonewgroups = "no", old default groups will be removed and not
        # replaced.
        push(@groupstoremove, @defaultstoremove);
        if (AnyDefaultGroups()
            && (($cgi->param('addtonewgroup') eq 'yes')
            || (($cgi->param('addtonewgroup') eq 'yesifinold')
            && ($buginanydefault)))) {
            push(@groupstoadd, @defaultstoadd);
        }

        # Now actually update the bug_group_map.
        my @DefGroupsAdded = ();
        my @DefGroupsRemoved = ();
        foreach my $groupid (@allgroups) {
            my $thisadd = grep( ($_ == $groupid), @groupstoadd);
            my $thisdel = grep( ($_ == $groupid), @groupstoremove);
            if ($thisadd) {
                push(@DefGroupsAdded, GroupIdToName($groupid));
                SendSQL("INSERT INTO bug_group_map (bug_id, group_id) VALUES " .
                        "($id, $groupid)");
            } elsif ($thisdel) {
                push(@DefGroupsRemoved, GroupIdToName($groupid));
                SendSQL("DELETE FROM bug_group_map WHERE bug_id = $id " .
                        "AND group_id = $groupid");
            }
        }
        if ((@DefGroupsAdded) || (@DefGroupsRemoved)) {
            LogActivityEntry($id, "bug_group",
                join(', ', @DefGroupsRemoved),
                join(', ', @DefGroupsAdded),
                     $whoid, $timestamp); 
        }
    }
  
    # get a snapshot of the newly set values out of the database, 
    # and then generate any necessary bug activity entries by seeing 
    # what has changed since before we wrote out the new values.
    #
    my @newvalues = SnapShotBug($id);
    my %newhash;
    $i = 0;
    foreach my $col (@::log_columns) {
        # Consider NULL db entries to be equivalent to the empty string
        $newvalues[$i] = defined($newvalues[$i]) ? $newvalues[$i] : '';
        # Convert the deadline to the YYYY-MM-DD format.
        if ($col eq 'deadline') {
            $newvalues[$i] = format_time($newvalues[$i], "%Y-%m-%d");
        }
        $newhash{$col} = $newvalues[$i];
        $i++;
    }
    # for passing to Bugzilla::BugMail to ensure that when someone is removed
    # from one of these fields, they get notified of that fact (if desired)
    #
    my $origOwner = "";
    my $origQaContact = "";

    # $msgs will store emails which have to be sent to voters, if any.
    my $msgs;

    foreach my $c (@::log_columns) {
        my $col = $c;           # We modify it, don't want to modify array
                                # values in place.
        my $old = shift @oldvalues;
        my $new = shift @newvalues;
        if ($old ne $new) {

            # Products and components are now stored in the DB using ID's
            # We need to translate this to English before logging it
            if ($col eq 'product_id') {
                $old = get_product_name($old);
                $new = get_product_name($new);
                $col = 'product';
            }
            if ($col eq 'component_id') {
                $old = get_component_name($old);
                $new = get_component_name($new);
                $col = 'component';
            }

            # save off the old value for passing to Bugzilla::BugMail so
            # the old assignee can be notified
            #
            if ($col eq 'assigned_to') {
                $old = ($old) ? DBID_to_name($old) : "";
                $new = ($new) ? DBID_to_name($new) : "";
                $origOwner = $old;
            }

            # ditto for the old qa contact
            #
            if ($col eq 'qa_contact') {
                $old = ($old) ? DBID_to_name($old) : "";
                $new = ($new) ? DBID_to_name($new) : "";
                $origQaContact = $old;
            }

            # If this is the keyword field, only record the changes, not everything.
            if ($col eq 'keywords') {
                ($old, $new) = diff_strings($old, $new);
            }

            if ($col eq 'product') {
                # If some votes have been removed, RemoveVotes() returns
                # a list of messages to send to voters.
                # We delay the sending of these messages till tables are unlocked.
                $msgs = RemoveVotes($id, 0,
                          "This bug has been moved to a different product");
            }

            if ($col eq 'bug_status' 
                && IsOpenedState($old) ne IsOpenedState($new))
            {
                $check_dep_bugs = 1;
            }

            LogActivityEntry($id,$col,$old,$new,$whoid,$timestamp);
            $bug_changed = 1;
        }
    }
    # Set and update flags.
    Bugzilla::Flag::process($id, undef, $timestamp, $cgi);

    if ($bug_changed) {
        SendSQL("UPDATE bugs SET delta_ts = $sql_timestamp WHERE bug_id = $id");
    }
    $dbh->bz_unlock_tables();

    # Now is a good time to send email to voters.
    foreach my $msg (@$msgs) {
        Bugzilla::BugMail::MessageToMTA($msg);
    }

    if ($duplicate) {
        # Check to see if Reporter of this bug is reporter of Dupe 
        SendSQL("SELECT reporter FROM bugs WHERE bug_id = " .
                $cgi->param('id'));
        my $reporter = FetchOneColumn();
        SendSQL("SELECT reporter FROM bugs WHERE bug_id = " .
                "$duplicate and reporter = $reporter");
        my $isreporter = FetchOneColumn();
        SendSQL("SELECT who FROM cc WHERE bug_id = " .
                " $duplicate and who = $reporter");
        my $isoncc = FetchOneColumn();
        unless ($isreporter || $isoncc
                || !$cgi->param('confirm_add_duplicate')) {
            # The reporter is oblivious to the existence of the new bug and is permitted access
            # ... add 'em to the cc (and record activity)
            LogActivityEntry($duplicate,"cc","",DBID_to_name($reporter),
                             $whoid,$timestamp);
            SendSQL("INSERT INTO cc (who, bug_id) " .
                    "VALUES ($reporter, $duplicate)");
        }
        # Bug 171639 - Duplicate notifications do not need to be private. 
        AppendComment($duplicate, $whoid,
                      "*** Bug " . $cgi->param('id') .
                      " has been marked as a duplicate of this bug. ***",
                      0, $timestamp);

        SendSQL("INSERT INTO duplicates VALUES ($duplicate, " .
                $cgi->param('id') . ")");
    }

    # Now all changes to the DB have been made. It's time to email
    # all concerned users, including the bug itself, but also the
    # duplicated bug and dependent bugs, if any.

    $vars->{'mailrecipients'} = { 'cc' => \@ccRemoved,
                                  'owner' => $origOwner,
                                  'qacontact' => $origQaContact,
                                  'changer' => Bugzilla->user->login };

    $vars->{'id'} = $id;
    $vars->{'type'} = "bug";
    
    # Let the user know the bug was changed and who did and didn't
    # receive email about the change.
    $template->process("bug/process/results.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
    $vars->{'header_done'} = 1;
    
    if ($duplicate) {
        $vars->{'mailrecipients'} = { 'changer' => Bugzilla->user->login }; 

        $vars->{'id'} = $duplicate;
        $vars->{'type'} = "dupe";
        
        # Let the user know a duplication notation was added to the original bug.
        $template->process("bug/process/results.html.tmpl", $vars)
          || ThrowTemplateError($template->error());
        $vars->{'header_done'} = 1;
    }

    if ($check_dep_bugs) {
        foreach my $k (keys(%dependencychanged)) {
            $vars->{'mailrecipients'} = { 'changer' => Bugzilla->user->login }; 
            $vars->{'id'} = $k;
            $vars->{'type'} = "dep";

            # Let the user (if he is able to see the bug) know we checked to see 
            # if we should email notice of this change to users with a relationship
            # to the dependent bug and who did and didn't receive email about it.
            $template->process("bug/process/results.html.tmpl", $vars)
              || ThrowTemplateError($template->error());
            $vars->{'header_done'} = 1;
        }
    }
}

# Determine if Patch Viewer is installed, for Diff link
# (NB: Duplicate code with show_bug.cgi.)
eval {
    require PatchReader;
    $vars->{'patchviewerinstalled'} = 1;
};

if (defined $cgi->param('id')) {
    $action = Bugzilla->user->settings->{'post_bug_submit_action'}->{'value'};
} else {
    # param('id') is not defined when changing multiple bugs
    $action = 'nothing';
}

if ($action eq 'next_bug') {
    my $next_bug;
    my $cur = lsearch(\@bug_list, $cgi->param("id"));
    if ($cur >= 0 && $cur < $#bug_list) {
        $next_bug = $bug_list[$cur + 1];
    }
    if ($next_bug) {
        if (detaint_natural($next_bug) && Bugzilla->user->can_see_bug($next_bug)) {
            my $bug = new Bugzilla::Bug($next_bug, $whoid);
            ThrowCodeError("bug_error", { bug => $bug }) if $bug->error;

            $vars->{'bugs'} = [$bug];
            $vars->{'nextbug'} = $bug->bug_id;

            $template->process("bug/show.html.tmpl", $vars)
              || ThrowTemplateError($template->error());

            exit;
        }
    }
} elsif ($action eq 'same_bug') {
    if (Bugzilla->user->can_see_bug($cgi->param('id'))) {
        my $bug = new Bugzilla::Bug($cgi->param('id'), $whoid);
        ThrowCodeError("bug_error", { bug => $bug }) if $bug->error;

        $vars->{'bugs'} = [$bug];

        $template->process("bug/show.html.tmpl", $vars)
          || ThrowTemplateError($template->error());

        exit;
    }
} elsif ($action ne 'nothing') {
    ThrowCodeError("invalid_post_bug_submit_action");
}

# End the response page.
$template->process("bug/navigate.html.tmpl", $vars)
  || ThrowTemplateError($template->error());
$template->process("global/footer.html.tmpl", $vars)
  || ThrowTemplateError($template->error());