summaryrefslogtreecommitdiffstats
path: root/Bugzilla/Hook.pm
blob: 18335b90782528e79d3f6a761cba2a1405cf1f93 (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
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.

package Bugzilla::Hook;

use 5.10.1;
use strict;
use warnings;

sub process {
  my ($name, $args) = @_;

  _entering($name);

  foreach my $extension (@{Bugzilla->extensions}) {
    if ($extension->can($name)) {
      $extension->$name($args);
    }
  }

  _leaving($name);
}

sub in {
  my $hook_name = shift;
  my $currently_in = Bugzilla->request_cache->{hook_stack}->[-1] || '';
  return $hook_name eq $currently_in ? 1 : 0;
}

sub _entering {
  my ($hook_name) = @_;
  my $hook_stack = Bugzilla->request_cache->{hook_stack} ||= [];
  push(@$hook_stack, $hook_name);
}

sub _leaving {
  pop @{Bugzilla->request_cache->{hook_stack}};
}

1;

__END__

=head1 NAME

Bugzilla::Hook - Extendable extension hooks for Bugzilla code

=head1 SYNOPSIS

 use Bugzilla::Hook;

 Bugzilla::Hook::process("hookname", { arg => $value, arg2 => $value2 });

=head1 DESCRIPTION

Bugzilla allows extension modules to drop in and add routines at
arbitrary points in Bugzilla code. These points are referred to as
hooks. When a piece of standard Bugzilla code wants to allow an extension
to perform additional functions, it uses Bugzilla::Hook's L</process>
subroutine to invoke any extension code if installed.

The implementation of extensions is described in L<Bugzilla::Extension>.

There is sample code for every hook in the Example extension, located in
F<extensions/Example/Extension.pm>.

=head2 How Hooks Work

When a hook named C<HOOK_NAME> is run, Bugzilla looks through all
enabled L<extensions|Bugzilla::Extension> for extensions that implement
a subroutine named C<HOOK_NAME>.

See L<Bugzilla::Extension> for more details about how an extension
can run code during a hook.

=head1 SUBROUTINES

=over

=item C<process>

=over

=item B<Description>

Invoke any code hooks with a matching name from any installed extensions.

See L<Bugzilla::Extension> for more information on Bugzilla's extension
mechanism.

=item B<Params>

=over

=item C<$name> - The name of the hook to invoke.

=item C<$args> - A hashref. The named args to pass to the hook.
They will be passed as arguments to the hook method in the extension.

=back

=item B<Returns> (nothing)

=back

=back

=head1 HOOKS

This describes what hooks exist in Bugzilla currently. They are mostly
in alphabetical order, but some related hooks are near each other instead
of being alphabetical.

=head2 admin_editusers_action

This hook allows you to add additional actions to the admin Users page.

Params:

=over

=item C<vars>

You can add as many new key/value pairs as you want to this hashref.
It will be passed to the template.

=item C<action>

A text which indicates the different behaviors that editusers.cgi will have.
With this hook you can change the behavior of an action or add new actions.

=item C<user>

This is a Bugzilla::User object of the user.

=back

=head2 attachment_end_of_update

Called during L<Bugzilla::Attachment/update>, after changes are made
to the database, but while still inside a transaction.

Params:

=over

=item C<object>

The attachment object that C<update> was called on.

=item C<old_object>

The attachment object as it was before it was updated.

=item C<changes>

The fields that have been changed, in the same format that
L<Bugzilla::Attachment/update> returns.

=back

=head2 attachment_process_data

This happens at the very beginning process of the attachment creation.
You can edit the attachment content itself as well as all attributes
of the attachment, before they are validated and inserted into the DB.

Params:

=over

=item C<data> - A reference pointing either to the content of the file
being uploaded or pointing to the filehandle associated with the file.

=item C<attributes> - A hashref whose keys are the same as the input to
L<Bugzilla::Attachment/create>. The data in this hashref hasn't been validated
yet.

=back

=head2 auth_login_methods

This allows you to add new login types to Bugzilla.
(See L<Bugzilla::Auth::Login>.)

Params:

=over

=item C<modules>

This is a hash--a mapping from login-type "names" to the actual module on
disk. The keys will be all the values that were passed to
L<Bugzilla::Auth/login> for the C<Login> parameter. The values are the
actual path to the module on disk. (For example, if the key is C<DB>, the
value is F<Bugzilla/Auth/Login/DB.pm>.)

For your extension, the path will start with
F<Bugzilla/Extension/Foo/>, where "Foo" is the name of your Extension.
(See the code in the example extension.)

If your login type is in the hash as a key, you should set that key to the
right path to your module. That module's C<new> method will be called,
probably with empty parameters. If your login type is I<not> in the hash,
you should not set it.

You will be prevented from adding new keys to the hash, so make sure your
key is in there before you modify it. (In other words, you can't add in
login methods that weren't passed to L<Bugzilla::Auth/login>.)

=back

=head2 auth_verify_methods

This works just like L</auth_login_methods> except it's for
login verification methods (See L<Bugzilla::Auth::Verify>.) It also
takes a C<modules> parameter, just like L</auth_login_methods>.

=head2 bug_columns

B<DEPRECATED> Use L</object_columns> instead.

This allows you to add new fields that will show up in every L<Bugzilla::Bug>
object. Note that you will also need to use the L</bug_fields> hook in
conjunction with this hook to make this work.

Params:

=over

=item C<columns> - An arrayref containing an array of column names. Push
your column name(s) onto the array.

=back

=head2 bug_end_of_create

This happens at the end of L<Bugzilla::Bug/create>, after all other changes are
made to the database. This occurs inside a database transaction.

Params:

=over

=item C<bug> - The created bug object.

=item C<timestamp> - The timestamp used for all updates in this transaction,
as a SQL date string.

=back

=head2 bug_end_of_create_validators

This happens during L<Bugzilla::Bug/create>, after all parameters have
been validated, but before anything has been inserted into the database.

Params:

=over

=item C<params>

A hashref. The validated parameters passed to C<create>.

=back

=head2 bug_end_of_update

This happens at the end of L<Bugzilla::Bug/update>, after all other changes are
made to the database. This generally occurs inside a database transaction.

Params:

=over

=item C<bug>

The changed bug object, with all fields set to their updated values.

=item C<old_bug>

A bug object pulled from the database before the fields were set to
their updated values (so it has the old values available for each field).

=item C<timestamp>

The timestamp used for all updates in this transaction, as a SQL date
string.

=item C<changes>

The hash of changed fields. C<< $changes->{field} = [old, new] >>

=back

=head2 bug_check_can_change_field

This hook controls what fields users are allowed to change. You can add code
here for site-specific policy changes and other customizations.

This hook is only executed if the field's new and old values differ.

Any denies take priority over any allows. So, if another extension denies
a change but yours allows the change, the other extension's deny will
override your extension's allow.

Params:

=over

=item C<bug>

L<Bugzilla::Bug> - The current bug object that this field is changing on.

=item C<field>

The name (from the C<fielddefs> table) of the field that we are checking.

=item C<new_value>

The new value that the field is being changed to.

=item C<old_value>

The old value that the field is being changed from.

=item C<priv_results>

C<array> - This is how you explicitly allow or deny a change. You should only
push something into this array if you want to explicitly allow or explicitly
deny the change, and thus skip all other permission checks that would otherwise
happen after this hook is called. If you don't care about the field change,
then don't push anything into the array.

The pushed value should be a choice from the following constants:

=over

=item C<PRIVILEGES_REQUIRED_NONE>

No privileges required. This explicitly B<allows> a change.

=item C<PRIVILEGES_REQUIRED_REPORTER>

User is not the reporter, assignee or an empowered user, so B<deny>.

=item C<PRIVILEGES_REQUIRED_ASSIGNEE>

User is not the assignee or an empowered user, so B<deny>.

=item C<PRIVILEGES_REQUIRED_EMPOWERED>

User is not a sufficiently empowered user, so B<deny>.

=back

=back

=head2 bug_fields

Allows the addition of database fields from the bugs table to the standard
list of allowable fields in a L<Bugzilla::Bug> object, so that
you can call the field as a method.

Note: You should add here the names of any fields you added in L</bug_columns>.

Params:

=over

=item C<columns> - A arrayref containing an array of column names. Push
your column name(s) onto the array.

=back

=head2 bug_format_comment

Allows you to do custom parsing on comments before they are displayed. You do
this by returning two regular expressions: one that matches the section you
want to replace, and then another that says what you want to replace that
match with.

The matching and replacement will be run with the C</g> switch on the regex.

Params:

=over

=item C<regexes>

An arrayref of hashrefs.

You should push a hashref containing two keys (C<match> and C<replace>)
in to this array. C<match> is the regular expression that matches the
text you want to replace, C<replace> is what you want to replace that
text with. (This gets passed into a regular expression like
C<s/$match/$replace/>.)

Instead of specifying a regular expression for C<replace> you can also
return a coderef (a reference to a subroutine). If you want to use
backreferences (using C<$1>, C<$2>, etc. in your C<replace>), you have to use
this method--it won't work if you specify C<$1>, C<$2> in a regular expression
for C<replace>. Your subroutine will get a hashref as its only argument. This
hashref contains a single key, C<matches>. C<matches> is an arrayref that
contains C<$1>, C<$2>, C<$3>, etc. in order, up to C<$10>. Your subroutine
should return what you want to replace the full C<match> with. (See the code
example for this hook if you want to see how this actually all works in code.
It's simpler than it sounds.)

B<You are responsible for HTML-escaping your returned data.> Failing to
do so could open a security hole in Bugzilla.

=item C<text>

A B<reference> to the exact text that you are parsing.

Generally you should not modify this yourself. Instead you should be
returning regular expressions using the C<regexes> array.

The text has not been parsed in any way. (So, for example, it is not
HTML-escaped. You get "&", not "&amp;".)

=item C<bug>

The L<Bugzilla::Bug> object that this comment is on. Sometimes this is
C<undef>, meaning that we are parsing text that is not on a bug.

=item C<comment>

A L<Bugzilla::Comment> object representing the comment you are about to
parse.

Sometimes this is C<undef>, meaning that we are parsing text that is
not a bug comment (but could still be some other part of a bug, like
the summary line).

=item C<user>

The L<Bugzilla::User> object representing the user who will see the text.
This is useful to determine how much confidential information can be displayed
to the user.

=back

=head2 bug_start_of_update

This happens near the beginning of L<Bugzilla::Bug/update>, after L<Bugzilla::Object/update>
is called, but before all other special changes are made to the database. Once use case is
this allows for adding your own entries to the C<changes> hash which gets added to the
bugs_activity table later keeping you from having to do it yourself. Also this is also helpful
if your extension needs to add CC members, flags, keywords, groups, etc. This generally
occurs inside a database transaction.

Params:

=over

=item C<bug>

The changed bug object, with all fields set to their updated values.

=item C<old_bug>

A bug object pulled from the database before the fields were set to
their updated values (so it has the old values available for each field).

=item C<timestamp>

The timestamp used for all updates in this transaction, as a SQL date
string.

=item C<changes>

The hash of changed fields. C<< $changes->{field} = [old, new] >>

=back

=head2 buglist_columns

This happens in L<Bugzilla::Search/COLUMNS>, which determines legal bug
list columns for F<buglist.cgi> and F<colchange.cgi>. It gives you the
opportunity to add additional display columns.

Params:

=over

=item C<columns> - A hashref, where the keys are unique string identifiers
for the column being defined and the values are hashrefs with the
following fields:

=over

=item C<name> - The name of the column in the database.

=item C<title> - The title of the column as displayed to users.

=back

The definition is structured as:

 $columns->{$id} = { name => $name, title => $title };

=back

=head2 buglist_column_joins

This allows you to join additional tables to display additional columns
in buglists. This hook is generally used in combination with the
C<buglist_columns> hook.

Params:

=over

=item C<column_joins> - A hashref containing data to return back to
L<Bugzilla::Search>. This hashref contains names of the columns as keys and
a hashref about table to join as values. This hashref has the following keys:

=over

=item C<table> - The name of the additional table to join.

=item C<as> - (optional) The alias used for the additional table. This alias
must not conflict with an existing alias already used in the query.

=item C<from> - (optional) The name of the column in the C<bugs> table which
the additional table should be linked to. If omitted, C<bug_id> will be used.

=item C<to> - (optional) The name of the column in the additional table which
should be linked to the column in the C<bugs> table, see C<from> above.
If omitted, C<bug_id> will be used.

=item C<join> - (optional) Either INNER or LEFT. Determine how the additional
table should be joined with the C<bugs> table. If omitted, LEFT is used.

=back

=back

=head2 search_operator_field_override

This allows you to modify L<Bugzilla::Search/OPERATOR_FIELD_OVERRIDE>,
which determines the search functions for fields. It allows you to specify
custom search functionality for certain fields.

See L<Bugzilla::Search/OPERATOR_FIELD_OVERRIDE> for reference and see
the code in the example extension.

Note that the interface to this hook is B<UNSTABLE> and it may change in the
future.

Params:

=over

=item C<operators> - See L<Bugzilla::Search/OPERATOR_FIELD_OVERRIDE> to get
an idea of the structure.

=item C<search> - The L<Bugzilla::Search> object.

=back

=head2 bugmail_recipients

This allows you to modify the list of users who are going to be receiving
a particular bugmail. It also allows you to specify why they are receiving
the bugmail.

Users' bugmail preferences will be applied to any users that you add
to the list. (So, for example, if you add somebody as though they were
a CC on the bug, and their preferences state that they don't get email
when they are a CC, they won't get email.)

This hook is called before watchers or globalwatchers are added to the
recipient list.

Params:

=over

=item C<bug>

The L<Bugzilla::Bug> that bugmail is being sent about.

=item C<recipients>

This is a hashref. The keys are numeric user ids from the C<profiles>
table in the database, for each user who should be receiving this bugmail.
The values are hashrefs. The keys in I<these> hashrefs correspond to
the "relationship" that the user has to the bug they're being emailed
about, and the value should always be C<1>. The "relationships"
are described by the various C<REL_> constants in L<Bugzilla::Constants>.

Here's an example of adding userid C<123> to the recipient list
as though he were on the CC list:

 $recipients->{123}->{+REL_CC} = 1

(We use C<+> in front of C<REL_CC> so that Perl interprets it as a constant
instead of as a string.)

=item C<users>

This is a hash of L<Bugzilla::User> objects, keyed by id. This is so you can
find out more information about any of the user ids in the C<recipients> hash.
Every id in the incoming C<recipients> hash will have an object in here.
(But if you add additional recipients to the C<recipients> hash, you are
B<not> required to add them to this hash.)

=item C<diffs>

This is a list of hashes, each hash representing a change to the bug. Each
hash has the following members: C<field_name>, C<bug_when>, C<old>, C<new>
and C<who> (a L<Bugzilla::User>). If appropriate, there will also be
C<attach_id> or C<comment_id>; if either is present, there will be
C<isprivate>. See C<_get_diffs> in F<Bugzilla/BugMail.pm> to see exactly how
it is populated. Warning: the format and existence of the "diffs" parameter
is subject to change in future releases of Bugzilla.

=back

=head2 bugmail_relationships

There are various sorts of "relationships" that a user can have to a bug,
such as Assignee, CC, etc. If you want to add a new type of relationship,
you should use this hook.

Params:

=over

=item C<relationships>

A hashref, where the keys are numbers and the values are strings.

The keys represent a numeric identifier for the relationship. The
numeric identifier should be a negative number between -1 and -127.
The number must be unique across all extensions. (Negative numbers
are used so as not to conflict with relationship identifiers in Bugzilla
itself.)

The value is the "name" of this relationship that will show up in email
headers in bugmails. The "name" should be short and should contain no
spaces.

=back


=head2 config_add_panels

If you want to add new panels to the Parameters administrative interface,
this is where you do it.

Params:

=over

=item C<panel_modules>

A hashref, where the keys are the "name" of the panel and the value
is the Perl module representing that panel. For example, if
the name is C<Auth>, the value would be C<Bugzilla::Config::Auth>.

For your extension, the Perl module would start with
C<Bugzilla::Extension::Foo>, where "Foo" is the name of your Extension.
(See the code in the example extension.)

=back

=head2 config_modify_panels

This is how you modify already-existing panels in the Parameters
administrative interface. For example, if you wanted to add a new
Auth method (modifying Bugzilla::Config::Auth) this is how you'd
do it.

Params:

=over

=item C<panels>

A hashref, where the keys are lower-case panel "names" (like C<auth>,
C<admin>, etc.) and the values are hashrefs. The hashref contains a
single key, C<params>. C<params> is an arrayref--the return value from
C<get_param_list> for that module. You can modify C<params> and
your changes will be reflected in the interface.

Adding new keys to C<panels> will have no effect. You should use
L</config_add_panels> if you want to add new panels.

=back

=head2 email_in_before_parse

This happens right after an inbound email is converted into an Email::MIME
object, but before we start parsing the email to extract field data. This
means the email has already been decoded for you. It gives you a chance
to interact with the email itself before L<email_in> starts parsing its content.

=over

=item C<mail> - An Email::MIME object. The decoded incoming email.

=item C<fields> - A hashref. The hash which will contain extracted data.

=back

=head2 email_in_after_parse

This happens after all the data has been extracted from the email, but before
the reporter is validated, during L<email_in>. This lets you do things after
the normal parsing of the email, such as sanitizing field data, changing the
user account being used to file a bug, etc.

=over

=item C<fields> - A hashref. The hash containing the extracted field data.

=back

=head2 enter_bug_entrydefaultvars

B<DEPRECATED> - Use L</template_before_process> instead.

This happens right before the template is loaded on enter_bug.cgi.

Params:

=over

=item C<vars> - A hashref. The variables that will be passed into the template.

=back

=head2 error_catch

This hook allows extensions to catch errors thrown by Bugzilla and
take the appropriate actions.

Params:

=over

=item C<error>

A string representing the error code thrown by Bugzilla. This string
matches the C<error> variable in C<global/user-error.html.tmpl> and
C<global/code-error.html.tmpl>.

=item C<message>

If the error mode is set to C<ERROR_MODE_WEBPAGE>, you get a reference to
the whole HTML page with the error message in it, including its header and
footer. If you need to extract the error message itself, you can do it by
looking at the content of the table cell whose ID is C<error_msg>.
If the error mode is not set to C<ERROR_MODE_WEBPAGE>, you get a reference
to the error message itself.

=item C<vars>

This hash contains all the data passed to the error template. Its content
depends on the error thrown.

=back

=head2 flag_end_of_update

This happens at the end of L<Bugzilla::Flag/update_flags>, after all other
changes are made to the database and after emails are sent. It gives you a
before/after snapshot of flags so you can react to specific flag changes.
This generally occurs inside a database transaction.

Note that the interface to this hook is B<UNSTABLE> and it may change in the
future.

Params:

=over

=item C<object> - The changed bug or attachment object.

=item C<timestamp> - The timestamp used for all updates in this transaction,
as a SQL date string.

=item C<old_flags> - The snapshot of flag summaries from before the change.

=item C<new_flags> - The snapshot of flag summaries after the change. Call
C<my ($removed, $added) = diff_arrays(old_flags, new_flags)> to get the list of
changed flags, and search for a specific condition like C<added eq 'review-'>.

=back

=head2 group_before_delete

This happens in L<Bugzilla::Group/remove_from_db>, after we've confirmed
that the group can be deleted, but before any rows have actually
been removed from the database. This occurs inside a database
transaction.

Params:

=over

=item C<group> - The L<Bugzilla::Group> being deleted.

=back

=head2 group_end_of_create

This happens at the end of L<Bugzilla::Group/create>, after all other
changes are made to the database. This occurs inside a database transaction.

Params:

=over

=item C<group>

The new L<Bugzilla::Group> object that was just created.

=back

=head2 group_end_of_update

This happens at the end of L<Bugzilla::Group/update>, after all other
changes are made to the database. This occurs inside a database transaction.

Params:

=over

=item C<group> - The changed L<Bugzilla::Group> object, with all fields set
to their updated values.

=item C<changes> - The hash of changed fields.
C<< $changes->{$field} = [$old, $new] >>

=back

=head2 install_before_final_checks

Allows execution of custom code before the final checks are done in
checksetup.pl.

Params:

=over

=item C<silent>

A flag that indicates whether or not checksetup is running in silent mode.
If this is true, messages that are I<always> printed by checksetup.pl should be
suppressed, but messages about any changes that are just being done this one
time should be printed.

=back

=head2 install_filesystem

Allows for additional files and directories to be added to the
list of files and directories already managed by checksetup.pl.
You will be able to also set permissions for the files and
directories using this hook. You can also use this hook to create
appropriate .htaccess files for any directory to secure its contents.
For examples see  L<FILESYSTEM> in L<Bugzilla::Install::Filesystem>.

Params:

=over

=item C<files>

Hash reference of files that are already present when your extension was
installed but need to have specific permissions set. Each file key
points to another hash reference containing the following settings.

Params:

=over

=item C<perms> - Permissions to be set on the file.

=back

=item C<create_dirs>

Hash reference containing the name of each directory that will be created,
pointing at its default permissions.

=item C<non_recurse_dirs>

Hash reference containing directories that we want to set the perms on, but not
recurse through. These are directories not created in checksetup.pl. Each directory
key's value is the permissions to be set on the directory.

=item C<recurse_dirs>

Hash reference of directories that will have permissions set for each item inside
each of the directories, including the directory itself. Each directory key
points to another hash reference containing the following settings.

Params:

=over

=item C<files> - Permissions to be set on any files beneath the directory.

=item C<dirs> - Permissions to be set on the directory itself and any directories
beneath it.

=back

=item C<create_files>

Hash reference of additional files to be created. Each file key points to another
hash reference containing the following settings.

Params:

=over

=item C<perms> - The permissions to be set on the file itself.

=item C<contents> - The contents to be added to the file or leave blank for an
empty file.

=back

=item C<htaccess>

Hash reference containing htaccess files to be created. You can set the permissions
for the htaccess as well as the contents of the file. Each file key points to another
hash reference containing the following settings.

Params:

=over

=item C<perms> - Permissions to be set on the htaccess file.

=item C<contents> - Contents of the htaccess file. It can be set manually or
use L<HT_DEFAULT_DENY> defined in L<Bugzilla::Install::Filesystem> to deny all
by default.

=back

=back

=head2 install_update_db

This happens at the very end of all the tables being updated
during an installation or upgrade. If you need to modify your custom
schema or add new columns to existing tables, do it here. No params are
passed.

=head2 install_update_db_fielddefs

This is used to update the schema of the fielddefs table before
any other schema changes take place. No params are passed.

This hook should only be used for updating the schema of the C<fielddefs>
table. Do not modify any other table in this hook. To modify other tables, use
the L</install_update_db> hook.

=head2 db_schema_abstract_schema

This allows you to add tables to Bugzilla. Note that we recommend that you
prefix the names of your tables with some word (preferably the name of
your Extension), so that they don't conflict with any future Bugzilla tables.

If you wish to add new I<columns> to existing Bugzilla tables, do that
in L</install_update_db>.

Params:

=over

=item C<schema> - A hashref, in the format of
L<Bugzilla::DB::Schema/ABSTRACT_SCHEMA>. Add new hash keys to make new table
definitions. F<checksetup.pl> will automatically add these tables to the
database when run.

=back

=head2 job_map

Bugzilla has a system - L<Bugzilla::JobQueue> - for running jobs
asynchronously, if the administrator has set it up. This hook allows the
addition of mappings from job names to handler classes, so an extension can
fire off jobs.

Params:

=over

=item C<job_map> - The job map hash. Key: the name of the job, as should be
passed to Bugzilla->job_queue->insert(). Value: the name of the Perl module
which implements the task (an instance of L<TheSchwartz::Worker>).

=back

=head2 mailer_before_send

Called right before L<Bugzilla::Mailer> sends a message to the MTA.

Params:

=over

=item C<email> - The C<Email::MIME> object that's about to be sent.

=item C<mailer_args> - An arrayref that's passed as C<mailer_args> to
L<Email::Send/new>.

=back

=head2 object_before_create

This happens at the beginning of L<Bugzilla::Object/create>.

Params:

=over

=item C<class>

The name of the class that C<create> was called on. You can check this
like C<< if ($class->isa('Some::Class')) >> in your code, to perform specific
tasks before C<create> for only certain classes.

=item C<params>

A hashref. The set of named parameters passed to C<create>.

=back


=head2 object_before_delete

This happens in L<Bugzilla::Object/remove_from_db>, after we've confirmed
that the object can be deleted, but before any rows have actually
been removed from the database. This sometimes occurs inside a database
transaction.

Params:

=over

=item C<object> - The L<Bugzilla::Object> being deleted. You will probably
want to check its type like C<< $object->isa('Some::Class') >> before doing
anything with it.

=back


=head2 object_before_set

Called during L<Bugzilla::Object/set>, before any actual work is done.
You can use this to perform actions before a value is changed for
specific fields on certain types of objects.

Params:

=over

=item C<object>

The object that C<set> was called on. You will probably want to
do something like C<< if ($object->isa('Some::Class')) >> in your code to
limit your changes to only certain subclasses of Bugzilla::Object.

=item C<field>

The name of the field being updated in the object.

=item C<value>

The value being set on the object.

=back

=head2 object_columns

This hook allows you to add new "fields" to existing Bugzilla objects,
that correspond to columns in their tables.

For example, if you added an C<example> column to the "bugs" table, you
would have to also add an C<example> field to the C<Bugzilla::Bug> object
in order to access that data via Bug objects.

Don't do anything slow inside this hook--it's called several times on
every page of Bugzilla.

Params:

=over

=item C<class>

The name of the class that this hook is being called on. You can check this
like C<< if ($class->isa('Some::Class')) >> in your code, to add new
fields only for certain classes.

=item C<columns>

An arrayref. Add the string names of columns to this array to add new
values to objects.

For example, if you add an C<example> column to a particular table
(using L</install_update_db>), and then push the string C<example> into
this array for the object that uses that table, then you can access the
information in that column via C<< $object->{example} >> on all objects
of that type.

This arrayref does not contain the standard column names--you cannot modify
or remove standard object columns using this hook.

=back

=head2 object_end_of_create

Called at the end of L<Bugzilla::Object/create>, after all other changes are
made to the database. This occurs inside a database transaction.

Params:

=over

=item C<class>

The name of the class that C<create> was called on. You can check this
like C<< if ($class->isa('Some::Class')) >> in your code, to perform specific
tasks for only certain classes.

=item C<object>

The created object.

=back

=head2 object_end_of_create_validators

Called at the end of L<Bugzilla::Object/run_create_validators>. You can
use this to run additional validation when creating an object.

If a subclass has overridden C<run_create_validators>, then this usually
happens I<before> the subclass does its custom validation.

Params:

=over

=item C<class>

The name of the class that C<create> was called on. You can check this
like C<< if ($class->isa('Some::Class')) >> in your code, to perform specific
tasks for only certain classes.

=item C<params>

A hashref. The set of named parameters passed to C<create>, modified and
validated by the C<VALIDATORS> specified for the object.

=back


=head2 object_end_of_set

Called during L<Bugzilla::Object/set>, after all the code of the function
has completed (so the value has been validated and the field has been set
to the new value). You can use this to perform actions after a value is
changed for specific fields on certain types of objects.

The new value is not specifically passed to this hook because you can
get it as C<< $object->{$field} >>.

Params:

=over

=item C<object>

The object that C<set> was called on. You will probably want to
do something like C<< if ($object->isa('Some::Class')) >> in your code to
limit your changes to only certain subclasses of Bugzilla::Object.

=item C<field>

The name of the field that was updated in the object.

=back


=head2 object_end_of_set_all

This happens at the end of L<Bugzilla::Object/set_all>. This is a
good place to call custom set_ functions on objects, or to make changes
to an object before C<update()> is called.

Params:

=over

=item C<object>

The L<Bugzilla::Object> which is being updated. You will probably want to
do something like C<< if ($object->isa('Some::Class')) >> in your code to
limit your changes to only certain subclasses of Bugzilla::Object.

=item C<params>

A hashref. The set of named parameters passed to C<set_all>.

=back

=head2 object_end_of_update

Called during L<Bugzilla::Object/update>, after changes are made
to the database, but while still inside a transaction.

Params:

=over

=item C<object>

The object that C<update> was called on. You will probably want to
do something like C<< if ($object->isa('Some::Class')) >> in your code to
limit your changes to only certain subclasses of Bugzilla::Object.

=item C<old_object>

The object as it was before it was updated.

=item C<changes>

The fields that have been changed, in the same format that
L<Bugzilla::Object/update> returns.

=back

=head2 object_update_columns

If you've added fields to bugs via L</object_columns>, then this
hook allows you to say which of those columns should be updated in the
database when L<Bugzilla::Object/update> is called on the object.

If you don't use this hook, then your custom columns won't be modified in
the database by Bugzilla.

Params:

=over

=item C<object>

The object that is about to be updated. You should check this
like C<< if ($object->isa('Some::Class')) >> in your code, to modify
the "update columns" only for certain classes.

=item C<columns>

An arrayref. Add the string names of columns to this array to allow
that column to be updated when C<update()> is called on the object.

This arrayref does not contain the standard column names--you cannot stop
standard columns from being updated by using this hook.

=back

=head2 object_validators

Allows you to add new items to L<Bugzilla::Object/VALIDATORS> for
particular classes.

Params:

=over

=item C<class>

The name of the class that C<VALIDATORS> was called on. You can check this
like C<< if ($class->isa('Some::Class')) >> in your code, to add
validators only for certain classes.

=item C<validators>

A hashref, where the keys are database columns and the values are subroutine
references. You can add new validators or modify existing ones. If you modify
an existing one, you should remember to call the original validator
inside of your modified validator. (This way, several extensions can all
modify the same validator.)

=back


=head2 page_before_template

This is a simple way to add your own pages to Bugzilla. This hooks C<page.cgi>,
which loads templates from F<template/en/default/pages>. For example,
C<page.cgi?id=fields.html> loads F<template/en/default/pages/fields.html.tmpl>.

This hook is called right before the template is loaded, so that you can
pass your own variables to your own pages.

You can also use this to implement complex custom pages, by doing your own
output and then calling  C<exit> at the end of the hook, thus preventing
the normal C<page.cgi> behavior from occurring.

Params:

=over

=item C<page_id>

This is the name of the page being loaded, like C<fields.html>.

Note that if two extensions use the same name, it is uncertain which will
override the others, so you should be careful with how you name your pages.
Usually extensions prefix their pages with a directory named after their
extension, so for an extension named "Foo", page ids usually look like
C<foo/mypage.html>.

=item C<vars>

This is a hashref--put variables into here if you want them passed to
your template.

=back

=head2 path_info_whitelist

By default, Bugzilla removes the Path-Info information from URLs before
passing data to CGI scripts. If this information is needed for your
customizations, you can enumerate the pages you want to whitelist here.

Params:

=over

=item C<whitelist>

An array of script names that will not have their Path-Info automatically
removed.

=back

=head2 post_bug_after_creation

B<DEPRECATED> (Use L</bug_end_of_create> instead.)

This happens after a bug is created and before bug mail is sent
during C<post_bug.cgi>. Note that this only happens during C<post_bug.cgi>,
it doesn't happen during any of the other methods of creating a bug.

Params:

=over

=item C<vars> - The template vars hashref.

=back


=head2 product_confirm_delete

B<DEPRECATED> - Use L</template_before_process> instead.

Called before displaying the confirmation message when deleting a product.

Params:

=over

=item C<vars> - The template vars hashref.

=back

=head2 product_end_of_create

Called right after a new product has been created, allowing additional
changes to be made to the new product's attributes. This occurs inside of
a database transaction, so if the hook throws an error, all previous
changes will be rolled back, including the creation of the new product.
(However, note that such rollbacks should not normally be used, as
some databases that Bugzilla supports have very bad rollback performance.
If you want to validate input and throw errors before the Product is created,
use L</object_end_of_create_validators> instead, or add a validator
using L</object_validators>.)

Params:

=over

=item C<product> - The new L<Bugzilla::Product> object that was just created.

=back

=head2 quicksearch_map

This hook allows you to alter the Quicksearch syntax to include e.g. special
searches for custom fields you have.

Params:

=over

=item C<map> - a hash where the key is the name you want to use in
Quicksearch, and the value is the name from the C<fielddefs> table that you
want it to map to. You can modify existing mappings or add new ones.

=back

=head2 sanitycheck_check

This hook allows for extra sanity checks to be added, for use by
F<sanitycheck.cgi>.

Params:

=over

=item C<status> - a CODEREF that allows status messages to be displayed
to the user. (F<sanitycheck.cgi>'s C<Status>)

=back

=head2 sanitycheck_repair

This hook allows for extra sanity check repairs to be made, for use by
F<sanitycheck.cgi>.

Params:

=over

=item C<status> - a CODEREF that allows status messages to be displayed
to the user. (F<sanitycheck.cgi>'s C<Status>)

=back

=head2 template_before_create

This hook allows you to modify the configuration of L<Bugzilla::Template>
objects before they are created. For example, you could add a new
global template variable this way.

Params:

=over

=item C<config>

A hashref--the configuration that will be passed to L<Template/new>.
See L<http://template-toolkit.org/docs/modules/Template.html#section_CONFIGURATION_SUMMARY>
for information on how this configuration variable is structured (or just
look at the code for C<create> in L<Bugzilla::Template>.)

=back

=head2 template_before_process

This hook is called any time Bugzilla processes a template file, including
calls to C<< $template->process >>, C<PROCESS> statements in templates,
and C<INCLUDE> statements in templates. It is not called when templates
process a C<BLOCK>, only when they process a file.

This hook allows you to define additional variables that will be available to
the template being processed, or to modify the variables that are currently
in the template. It works exactly as though you inserted code to modify
template variables at the top of a template.

You probably want to restrict this hook to operating only if a certain
file is being processed (which is why you get a C<file> argument
below). Otherwise, modifying the C<vars> argument will affect every single
template in Bugzilla.

B<Note:> This hook is not called if you are already in this hook.
(That is, it won't call itself recursively.) This prevents infinite
recursion in situations where this hook needs to process a template
(such as if this hook throws an error).

Params:

=over

=item C<vars>

This is the entire set of variables that the current template can see.
Technically, this is a L<Template::Stash> object, but you can just
use it like a hashref if you want.

=item C<file>

The name of the template file being processed. This is relative to the
main template directory for the language (i.e. for
F<template/en/default/bug/show.html.tmpl>, this variable will contain
C<bug/show.html.tmpl>).

=item C<context>

A L<Template::Context> object. Usually you will not have to use this, but
if you need information about the template itself (other than just its
name), you can get it from here.

=back

=head2 user_preferences

This hook allows you to add additional panels to the User Preferences page,
and validate data displayed and returned from these panels. It works in
combination with the C<tabs> hook available in the
F<template/en/default/account/prefs/prefs.html.tmpl> template. To make it
work, you must define two templates in your extension:
F<extensions/Foo/template/en/default/hook/account/prefs/prefs-tabs.html.tmpl>
contains a list of additional panels to include.
F<extensions/Foo/template/en/default/account/prefs/bar.html.tmpl> contains
the content of the panel itself. See the C<Example> extension to see how
things work.

Params:

=over

=item C<current_tab>

The name of the current panel being viewed by the user. You should always
make sure that the name of the panel matches what you expect it to be.
Else you could be interacting with the panel of another extension.

=item C<save_changes>

A boolean which is true when data should be validated and the DB updated
accordingly. This means the user clicked the "Submit Changes" button.

=item C<handled>

This is a B<reference> to a scalar, not a scalar. (So you would set it like
C<$$handled = 1>, not like C<$handled = 1>.) Set this to a true value to let
Bugzilla know that the passed-in panel is valid and that you have handled it.
(Otherwise, Bugzilla will throw an error that the panel is invalid.) Don't set
this to true if you didn't handle the panel listed in C<current_tab>.

=item C<vars>

You can add as many new key/value pairs as you want to this hashref.
It will be passed to the template.

=back

=head2 webservice

This hook allows you to add your own modules to the WebService. (See
L<Bugzilla::WebService>.)

Params:

=over

=item C<dispatch>

A hashref where you can specify the names of your modules and which Perl
module handles the functions for that module. (This is actually sent to
L<SOAP::Lite/dispatch_with>. You can see how that's used in F<xmlrpc.cgi>.)

The Perl module name will most likely start with C<Bugzilla::Extension::Foo::>
(where "Foo" is the name of your extension).

Example:

  $dispatch->{'Example.Blah'} = "Bugzilla::Extension::Example::Webservice::Blah";

And then you'd have a module F<extensions/Example/lib/Webservice/Blah.pm>,
and could call methods from that module like C<Example.Blah.Foo()> using
the WebServices interface.

It's recommended that all the keys you put in C<dispatch> start with the
name of your extension, so that you don't conflict with the standard Bugzilla
WebService functions (and so that you also don't conflict with other
plugins).

=back

=head2 webservice_error_codes

If your webservice extension throws custom errors, you can set numeric
codes for those errors here.

Extensions should use error codes above 10000, unless they are re-using
an already-existing error code.

Params:

=over

=item C<error_map>

A hash that maps the names of errors (like C<invalid_param>) to numbers.
See L<Bugzilla::WebService::Constants/WS_ERROR_CODE> for an example.

=back

=head2 webservice_fix_credentials

This hook allows for altering the credential parameters provided by the client
before authentication actually occurs. For example, this can be used to allow mapping
of custom parameters to the standard Bugzilla_login and Bugzilla_password parameters.

Params:

=over

=item C<params>

A hash ref containing the parameters passed into the webservice after
they have been obtained from the URL or body of the request.

=back

=head2 webservice_rest_request

This hook allows for altering any of the parameters provided by the client
after authentication has occured. You are able to change things like renaming
of keys, removing values, or adding additional information.

Params:

=over

=item C<params>

A hash ref containing the parameters passed into the webservice after
they have been obtained from the URL or body of the request.

=item C<rpc>

The current JSONRPC, XMLRPC, or REST object.

=back

=head2 webservice_rest_resources

This hook allows for altering of the REST resources data allowing you to
add additional paths to perform additional operations or to override the
resources already provided by the webservice modules.

Params:

=over

=item C<resources>

A hash returned from each module loaded that is used to determine
which code handler to use based on a regex match of the CGI path.

=item C<rpc>

The current JSONRPC, XMLRPC, or REST object.

=back

=head2 webservice_rest_response

This hook allows for altering the result data or response object
that is being returned by the current REST webservice call.

Params:

=over

=item C<response>

The HTTP response object generated by JSON-RPC library. You can use this
to add headers, etc.

=item C<result>

A reference to a hash that contains the result data.

=item C<rpc>

The current JSONRPC, XMLRPC, or REST object.

=back

=head2 wevservice_status_code_map

This hook allows an extension to change the status codes returned by
specific webservice errors. The valid internal error codes that Bugzilla
generates, and the status codes they map to by default, are defined in the
C<WS_ERROR_CODE> constant in C<Bugzilla::WebService::Constants>. When
remapping an error, you may wish to use an existing status code constant.
Such constants are also in C<Bugzilla::WebService::Constants> and start
with C<STATUS_*> such as C<STATUS_BAD_REQUEST>.

Params:

=over

=item C<status_code_map>

A hash reference containing the current status code mapping.

=back

=head1 SEE ALSO

L<Bugzilla::Extension>