summaryrefslogtreecommitdiffstats
path: root/extensions/Example/Extension.pm
blob: 81cebf4fab24ddfbba45ad964e168023aaae8add (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
# -*- 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 Everything Solved, Inc.
# Portions created by the Initial Developers are Copyright (C) 2009 the
# Initial Developer. All Rights Reserved.
#
# Contributor(s):
#   Max Kanat-Alexander <mkanat@bugzilla.org>
#   Frédéric Buclin <LpSolit@gmail.com>

package Bugzilla::Extension::Example;
use strict;
use base qw(Bugzilla::Extension);

use Bugzilla::Constants;
use Bugzilla::Error;
use Bugzilla::Group;
use Bugzilla::User;
use Bugzilla::User::Setting;
use Bugzilla::Util qw(diff_arrays html_quote);
use Bugzilla::Status qw(is_open_state);
use Bugzilla::Install::Filesystem;

# This is extensions/Example/lib/Util.pm. I can load this here in my
# Extension.pm only because I have a Config.pm.
use Bugzilla::Extension::Example::Util;

use Data::Dumper;

# See bugmail_relationships.
use constant REL_EXAMPLE => -127;

our $VERSION = '1.0';

sub attachment_process_data {
    my ($self, $args) = @_;
    my $type     = $args->{attributes}->{mimetype};
    my $filename = $args->{attributes}->{filename};

    # Make sure images have the correct extension.
    # Uncomment the two lines below to make this check effective.
    if ($type =~ /^image\/(\w+)$/) {
        my $format = $1;
        if ($filename =~ /^(.+)(:?\.[^\.]+)$/) {
            my $name = $1;
            #$args->{attributes}->{filename} = "${name}.$format";
        }
        else {
            # The file has no extension. We append it.
            #$args->{attributes}->{filename} .= ".$format";
        }
    }
}

sub auth_login_methods {
    my ($self, $args) = @_;
    my $modules = $args->{modules};
    if (exists $modules->{Example}) {
        $modules->{Example} = 'Bugzilla/Extension/Example/Auth/Login.pm';
    }
}

sub auth_verify_methods {
    my ($self, $args) = @_;
    my $modules = $args->{modules};
    if (exists $modules->{Example}) {
        $modules->{Example} = 'Bugzilla/Extension/Example/Auth/Verify.pm';
    }
}

sub bug_columns {
    my ($self, $args) = @_;
    my $columns = $args->{'columns'};
    push (@$columns, "delta_ts AS example")
}

sub bug_end_of_create {
    my ($self, $args) = @_;

    # This code doesn't actually *do* anything, it's just here to show you
    # how to use this hook.
    my $bug = $args->{'bug'};
    my $timestamp = $args->{'timestamp'};
    
    my $bug_id = $bug->id;
    # Uncomment this line to see a line in your webserver's error log whenever
    # you file a bug.
    # warn "Bug $bug_id has been filed!";
}

sub bug_end_of_create_validators {
    my ($self, $args) = @_;
    
    # This code doesn't actually *do* anything, it's just here to show you
    # how to use this hook.
    my $bug_params = $args->{'params'};
    
    # Uncomment this line below to see a line in your webserver's error log
    # containing all validated bug field values every time you file a bug.
    # warn Dumper($bug_params);
    
    # This would remove all ccs from the bug, preventing ANY ccs from being
    # added on bug creation.
    # $bug_params->{cc} = [];
}

sub bug_end_of_update {
    my ($self, $args) = @_;
    
    # This code doesn't actually *do* anything, it's just here to show you
    # how to use this hook.
    my ($bug, $old_bug, $timestamp, $changes) = 
        @$args{qw(bug old_bug timestamp changes)};
    
    foreach my $field (keys %$changes) {
        my $used_to_be = $changes->{$field}->[0];
        my $now_it_is  = $changes->{$field}->[1];
    }

    my $old_summary = $old_bug->short_desc;

    my $status_message;
    if (my $status_change = $changes->{'bug_status'}) {
        my $old_status = new Bugzilla::Status({ name => $status_change->[0] });
        my $new_status = new Bugzilla::Status({ name => $status_change->[1] });
        if ($new_status->is_open && !$old_status->is_open) {
            $status_message = "Bug re-opened!";
        }
        if (!$new_status->is_open && $old_status->is_open) {
            $status_message = "Bug closed!";
        }
    }
    
    my $bug_id = $bug->id;
    my $num_changes = scalar keys %$changes;
    my $result = "There were $num_changes changes to fields on bug $bug_id"
                 . " at $timestamp.";
    # Uncomment this line to see $result in your webserver's error log whenever
    # you update a bug.
    # warn $result;
}

sub bug_fields {
    my ($self, $args) = @_;

    my $fields = $args->{'fields'};
    push (@$fields, "example")
}

sub bug_format_comment {
    my ($self, $args) = @_;
    
    # This replaces every occurrence of the word "foo" with the word
    # "bar"
    
    my $regexes = $args->{'regexes'};
    push(@$regexes, { match => qr/\bfoo\b/, replace => 'bar' });
    
    # And this links every occurrence of the word "bar" to example.com,
    # but it won't affect "foo"s that have already been turned into "bar"
    # above (because each regex is run in order, and later regexes don't modify
    # earlier matches, due to some cleverness in Bugzilla's internals).
    #
    # For example, the phrase "foo bar" would become:
    # bar <a href="http://example.com/bar">bar</a>
    my $bar_match = qr/\b(bar)\b/;
    push(@$regexes, { match => $bar_match, replace => \&_replace_bar });
}

# Used by bug_format_comment--see its code for an explanation.
sub _replace_bar {
    my $args = shift;
    # $match is the first parentheses match in the $bar_match regex 
    # in bug-format_comment.pl. We get up to 10 regex matches as 
    # arguments to this function.
    my $match = $args->{matches}->[0];
    # Remember, you have to HTML-escape any data that you are returning!
    $match = html_quote($match);
    return qq{<a href="http://example.com/">$match</a>};
};

sub buglist_columns {
    my ($self, $args) = @_;
    
    my $columns = $args->{'columns'};
    $columns->{'example'} = { 'name' => 'bugs.delta_ts' , 'title' => 'Example' };
}

sub search_operator_field_override {
    my ($self, $args) = @_;
    
    my $operators = $args->{'operators'};

    my $original = $operators->{component}->{_non_changed};
    $operators->{component} = {
        _non_changed => sub { _component_nonchanged($original, @_) }
    };
}

sub _component_nonchanged {
    my $original = shift;
    my ($invocant, $args) = @_;

    $invocant->$original($args);
    # Actually, it does not change anything in the result,
    # just an example.
    $args->{term} = $args->{term} . " OR 1=2";
}

sub bugmail_recipients {
    my ($self, $args) = @_;
    my $recipients = $args->{recipients};
    my $bug = $args->{bug};

    my $user = 
        new Bugzilla::User({ name => Bugzilla->params->{'maintainer'} });

    if ($bug->id == 1) {
        # Uncomment the line below to add the maintainer to the recipients
        # list of every bugmail from bug 1 as though that the maintainer
        # were on the CC list.
        #$recipients->{$user->id}->{+REL_CC} = 1;

        # And this line adds the maintainer as though he had the "REL_EXAMPLE"
        # relationship from the bugmail_relationships hook below.
        #$recipients->{$user->id}->{+REL_EXAMPLE} = 1;
    }
}

sub bugmail_relationships {
    my ($self, $args) = @_;
    my $relationships = $args->{relationships};
    $relationships->{+REL_EXAMPLE} = 'Example';
}

sub config {
    my ($self, $args) = @_;

    my $config = $args->{config};
    $config->{Example} = "Bugzilla::Extension::Example::Config";
}

sub config_add_panels {
    my ($self, $args) = @_;
    
    my $modules = $args->{panel_modules};
    $modules->{Example} = "Bugzilla::Extension::Example::Config";
}

sub config_modify_panels {
    my ($self, $args) = @_;
    
    my $panels = $args->{panels};
    
    # Add the "Example" auth methods.
    my $auth_params = $panels->{'auth'}->{params};
    my ($info_class)   = grep($_->{name} eq 'user_info_class', @$auth_params);
    my ($verify_class) = grep($_->{name} eq 'user_verify_class', @$auth_params);

    push(@{ $info_class->{choices} },   'CGI,Example');
    push(@{ $verify_class->{choices} }, 'Example');

    push(@$auth_params, { name => 'param_example',
                          type => 't',
                          default => 0,
                          checker => \&check_numeric });    
}

sub db_schema_abstract_schema {
    my ($self, $args) = @_;
#    $args->{'schema'}->{'example_table'} = {
#        FIELDS => [
#            id       => {TYPE => 'SMALLSERIAL', NOTNULL => 1,
#                     PRIMARYKEY => 1},
#            for_key  => {TYPE => 'INT3', NOTNULL => 1,
#                           REFERENCES  => {TABLE  =>  'example_table2',
#                                           COLUMN =>  'id',
#                                           DELETE => 'CASCADE'}},
#            col_3    => {TYPE => 'varchar(64)', NOTNULL => 1},
#        ],
#        INDEXES => [
#            id_index_idx   => {FIELDS => ['col_3'], TYPE => 'UNIQUE'},
#            for_id_idx => ['for_key'],
#        ],
#    };
}

sub email_in_before_parse {
    my ($self, $args) = @_;

    my $subject = $args->{mail}->header('Subject');
    # Correctly extract the bug ID from email subjects of the form [Bug comp/NNN].
    if ($subject =~ /\[.*(\d+)\].*/) {
        $args->{fields}->{bug_id} = $1;
    }
}

sub email_in_after_parse {
    my ($self, $args) = @_;
    my $reporter = $args->{fields}->{reporter};
    my $dbh = Bugzilla->dbh;

    # No other check needed if this is a valid regular user.
    return if login_to_id($reporter);

    # The reporter is not a regular user. We create an account for him,
    # but he can only comment on existing bugs.
    # This is useful for people who reply by email to bugmails received
    # in mailing-lists.
    if ($args->{fields}->{bug_id}) {
        # WARNING: we return now to skip the remaining code below.
        # You must understand that removing this line would make the code
        # below effective! Do it only if you are OK with the behavior
        # described here.
        return;

        Bugzilla::User->create({ login_name => $reporter, cryptpassword => '*' });

        # For security reasons, delete all fields unrelated to comments.
        foreach my $field (keys %{$args->{fields}}) {
            next if $field =~ /^(?:bug_id|comment|reporter)$/;
            delete $args->{fields}->{$field};
        }
    }
    else {
        ThrowUserError('invalid_username', { name => $reporter });
    }
}

sub enter_bug_entrydefaultvars {
    my ($self, $args) = @_;
    
    my $vars = $args->{vars};
    $vars->{'example'} = 1;
}

sub flag_end_of_update {
    my ($self, $args) = @_;
    
    # This code doesn't actually *do* anything, it's just here to show you
    # how to use this hook.
    my $flag_params = $args;
    my ($object, $timestamp, $old_flags, $new_flags) =
        @$flag_params{qw(object timestamp old_flags new_flags)};
    my ($removed, $added) = diff_arrays($old_flags, $new_flags);
    my ($granted, $denied) = (0, 0);
    foreach my $new_flag (@$added) {
        $granted++ if $new_flag =~ /\+$/;
        $denied++ if $new_flag =~ /-$/;
    }
    my $bug_id = $object->isa('Bugzilla::Bug') ? $object->id 
                                               : $object->bug_id;
    my $result = "$granted flags were granted and $denied flags were denied"
                 . " on bug $bug_id at $timestamp.";
    # Uncomment this line to see $result in your webserver's error log whenever
    # you update flags.
    # warn $result;
}

sub group_before_delete {
    my ($self, $args) = @_;
    # This code doesn't actually *do* anything, it's just here to show you
    # how to use this hook.

    my $group = $args->{'group'};
    my $group_id = $group->id;
    # Uncomment this line to see a line in your webserver's error log whenever
    # you file a bug.
    # warn "Group $group_id is about to be deleted!";
}

sub group_end_of_create {
    my ($self, $args) = @_;
    # This code doesn't actually *do* anything, it's just here to show you
    # how to use this hook.
    my $group = $args->{'group'};

    my $group_id = $group->id;
    # Uncomment this line to see a line in your webserver's error log whenever
    # you create a new group.
    #warn "Group $group_id has been created!";
}

sub group_end_of_update {
    my ($self, $args) = @_;
    # This code doesn't actually *do* anything, it's just here to show you
    # how to use this hook.

    my ($group, $changes) = @$args{qw(group changes)};

    foreach my $field (keys %$changes) {
        my $used_to_be = $changes->{$field}->[0];
        my $now_it_is  = $changes->{$field}->[1];
    }

    my $group_id = $group->id;
    my $num_changes = scalar keys %$changes;
    my $result = 
        "There were $num_changes changes to fields on group $group_id.";
    # Uncomment this line to see $result in your webserver's error log whenever
    # you update a group.
    #warn $result;
}

sub install_before_final_checks {
    my ($self, $args) = @_;
    print "Install-before_final_checks hook\n" unless $args->{silent};
    
    # Add a new user setting like this:
    #
    # add_setting('product_chooser',           # setting name
    #             ['pretty', 'full', 'small'], # options
    #             'pretty');                   # default
    #
    # To add descriptions for the setting and choices, add extra values to 
    # the hash defined in global/setting-descs.none.tmpl. Do this in a hook: 
    # hook/global/setting-descs-settings.none.tmpl .
}

sub install_filesystem {
    my ($self, $args) = @_;
    my $create_dirs  = $args->{'create_dirs'};
    my $recurse_dirs = $args->{'recurse_dirs'};
    my $htaccess     = $args->{'htaccess'};

    # Create a new directory in datadir specifically for this extension.
    # The directory will need to allow files to be created by the extension
    # code as well as allow the webserver to server content from it.
    # my $data_path = bz_locations->{'datadir'} . "/" . __PACKAGE__->NAME;
    # $create_dirs->{$data_path} = Bugzilla::Install::Filesystem::DIR_CGI_WRITE;
   
    # Update the permissions of any files and directories that currently reside
    # in the extension's directory. 
    # $recurse_dirs->{$data_path} = {
    #     files => Bugzilla::Install::Filesystem::CGI_READ,
    #     dirs  => Bugzilla::Install::Filesystem::DIR_CGI_WRITE
    # };
    
    # Create a htaccess file that allows specific content to be served from the 
    # extension's directory.
    # $htaccess->{"$data_path/.htaccess"} = {
    #     perms    => Bugzilla::Install::Filesystem::WS_SERVE,
    #     contents => Bugzilla::Install::Filesystem::HT_DEFAULT_DENY
    # };
}

sub install_update_db {
    my $dbh = Bugzilla->dbh;
#    $dbh->bz_add_column('example', 'new_column',
#                        {TYPE => 'INT2', NOTNULL => 1, DEFAULT => 0});
#    $dbh->bz_add_index('example', 'example_new_column_idx', [qw(value)]);
}

sub install_update_db_fielddefs {
    my $dbh = Bugzilla->dbh;
#    $dbh->bz_add_column('fielddefs', 'example_column', 
#                        {TYPE => 'MEDIUMTEXT', NOTNULL => 1, DEFAULT => ''});
}

sub job_map {
    my ($self, $args) = @_;
    
    my $job_map = $args->{job_map};
    
    # This adds the named class (an instance of TheSchwartz::Worker) as a
    # handler for when a job is added with the name "some_task".
    $job_map->{'some_task'} = 'Bugzilla::Extension::Example::Job::SomeClass';
    
    # Schedule a job like this:
    # my $queue = Bugzilla->job_queue();
    # $queue->insert('some_task', { some_parameter => $some_variable });
}

sub mailer_before_send {
    my ($self, $args) = @_;
    
    my $email = $args->{email};
    # If you add a header to an email, it's best to start it with
    # 'X-Bugzilla-<Extension>' so that you don't conflict with
    # other extensions.
    $email->header_set('X-Bugzilla-Example-Header', 'Example');
}

sub object_before_create {
    my ($self, $args) = @_;
    
    my $class = $args->{'class'};
    my $object_params = $args->{'params'};
    
    # Note that this is a made-up class, for this example.
    if ($class->isa('Bugzilla::ExampleObject')) {
        warn "About to create an ExampleObject!";
        warn "Got the following parameters: " 
             . join(', ', keys(%$object_params));
    }
}

sub object_before_delete {
    my ($self, $args) = @_;

    my $object = $args->{'object'};

    # Note that this is a made-up class, for this example.
    if ($object->isa('Bugzilla::ExampleObject')) {
        my $id = $object->id;
        warn "An object with id $id is about to be deleted!";
    } 
}

sub object_before_set {
    my ($self, $args) = @_;
    
    my ($object, $field, $value) = @$args{qw(object field value)};
    
    # Note that this is a made-up class, for this example.
    if ($object->isa('Bugzilla::ExampleObject')) {
        warn "The field $field is changing from " . $object->{$field} 
             . " to $value!";
    }
}

sub object_columns {
    my ($self, $args) = @_;
    my ($class, $columns) = @$args{qw(class columns)};

    if ($class->isa('Bugzilla::ExampleObject')) {
        push(@$columns, 'example');
    }
}

sub object_end_of_create {
    my ($self, $args) = @_;
    
    my $class  = $args->{'class'};
    my $object = $args->{'object'};

    warn "Created a new $class object!";
}

sub object_end_of_create_validators {
    my ($self, $args) = @_;
    
    my $class = $args->{'class'};
    my $object_params = $args->{'params'};
    
    # Note that this is a made-up class, for this example.
    if ($class->isa('Bugzilla::ExampleObject')) {
        # Always set example_field to 1, even if the validators said otherwise.
        $object_params->{example_field} = 1;
    }
    
}

sub object_end_of_set {
    my ($self, $args) = @_;

    my ($object, $field) = @$args{qw(object field)};

    # Note that this is a made-up class, for this example.
    if ($object->isa('Bugzilla::ExampleObject')) {
        warn "The field $field has changed to " . $object->{$field};
    }
}

sub object_end_of_set_all {
    my ($self, $args) = @_;
    
    my $object = $args->{'object'};
    my $object_params = $args->{'params'};
    
    # Note that this is a made-up class, for this example.
    if ($object->isa('Bugzilla::ExampleObject')) {
        if ($object_params->{example_field} == 1) {
            $object->{example_field} = 1;
        }
    }
    
}

sub object_end_of_update {
    my ($self, $args) = @_;
    
    my ($object, $old_object, $changes) = 
        @$args{qw(object old_object changes)};
    
    # Note that this is a made-up class, for this example.
    if ($object->isa('Bugzilla::ExampleObject')) {
        if (defined $changes->{'name'}) {
            my ($old, $new) = @{ $changes->{'name'} };
            print "The name field changed from $old to $new!";
        }
    }
}

sub object_update_columns {
    my ($self, $args) = @_;
    my ($object, $columns) = @$args{qw(object columns)};

    if ($object->isa('Bugzilla::ExampleObject')) {
        push(@$columns, 'example');
    }
}

sub object_validators {
    my ($self, $args) = @_;
    my ($class, $validators) = @$args{qw(class validators)};

    if ($class->isa('Bugzilla::Bug')) {
        # This is an example of adding a new validator.
        # See the _check_example subroutine below.
        $validators->{example} = \&_check_example;

        # This is an example of overriding an existing validator.
        # See the check_short_desc validator below.
        my $original = $validators->{short_desc};
        $validators->{short_desc} = sub { _check_short_desc($original, @_) };
    }
}

sub _check_example {
    my ($invocant, $value, $field) = @_;
    warn "I was called to validate the value of $field.";
    warn "The value of $field that I was passed in is: $value";

    # Make the value always be 1.
    my $fixed_value = 1;
    return $fixed_value;
}

sub _check_short_desc {
    my $original = shift;
    my $invocant = shift;
    my $value = $invocant->$original(@_);
    if ($value !~ /example/i) {
        # Uncomment this line to make Bugzilla throw an error every time
        # you try to file a bug or update a bug without the word "example"
        # in the summary.
        #ThrowUserError('example_short_desc_invalid');
    }
    return $value;
}

sub page_before_template {
    my ($self, $args) = @_;
    
    my ($vars, $page) = @$args{qw(vars page_id)};
    
    # You can see this hook in action by loading page.cgi?id=example.html
    if ($page eq 'example.html') {
        $vars->{cgi_variables} = { Bugzilla->cgi->Vars };
    }
}

sub post_bug_after_creation {
    my ($self, $args) = @_;
    
    my $vars = $args->{vars};
    $vars->{'example'} = 1;
}

sub product_confirm_delete {
    my ($self, $args) = @_;
    
    my $vars = $args->{vars};
    $vars->{'example'} = 1;
}


sub product_end_of_create {
    my ($self, $args) = @_;

    my $product = $args->{product};

    # For this example, any lines of code that actually make changes to your
    # database have been commented out.

    # This section will take a group that exists in your installation
    # (possible called test_group) and automatically makes the new
    # product hidden to only members of the group. Just remove
    # the restriction if you want the new product to be public.

    my $example_group = new Bugzilla::Group({ name => 'example_group' });

    if ($example_group) {
        $product->set_group_controls($example_group, 
                { entry          => 1,
                  membercontrol  => CONTROLMAPMANDATORY,
                  othercontrol   => CONTROLMAPMANDATORY });
#        $product->update();
    }

    # This section will automatically add a default component
    # to the new product called 'No Component'.

    my $default_assignee = new Bugzilla::User(
        { name => Bugzilla->params->{maintainer} });

    if ($default_assignee) {
#        Bugzilla::Component->create(
#            { name             => 'No Component',
#              product          => $product,
#              description      => 'Select this component if one does not ' . 
#                                  'exist in the current list of components',
#              initialowner     => $default_assignee });
    }
}

sub quicksearch_map {
    my ($self, $args) = @_;
    my $map = $args->{'map'};

    # This demonstrates adding a shorter alias for a long custom field name.
    $map->{'impact'} = $map->{'cf_long_field_name_for_impact_field'};
}

sub sanitycheck_check {
    my ($self, $args) = @_;
    
    my $dbh = Bugzilla->dbh;
    my $sth;
    
    my $status = $args->{'status'};
    
    # Check that all users are Australian
    $status->('example_check_au_user');
    
    $sth = $dbh->prepare("SELECT userid, login_name
                            FROM profiles
                           WHERE login_name NOT LIKE '%.au'");
    $sth->execute;
    
    my $seen_nonau = 0;
    while (my ($userid, $login, $numgroups) = $sth->fetchrow_array) {
        $status->('example_check_au_user_alert',
                  { userid => $userid, login => $login },
                  'alert');
        $seen_nonau = 1;
    }
    
    $status->('example_check_au_user_prompt') if $seen_nonau;
}

sub sanitycheck_repair {
    my ($self, $args) = @_;
    
    my $cgi = Bugzilla->cgi;
    my $dbh = Bugzilla->dbh;
    
    my $status = $args->{'status'};
    
    if ($cgi->param('example_repair_au_user')) {
        $status->('example_repair_au_user_start');
    
        #$dbh->do("UPDATE profiles
        #             SET login_name = CONCAT(login_name, '.au')
        #           WHERE login_name NOT LIKE '%.au'");
    
        $status->('example_repair_au_user_end');
    }
}

sub template_before_create {
    my ($self, $args) = @_;
    
    my $config = $args->{'config'};
    # This will be accessible as "example_global_variable" in every
    # template in Bugzilla. See Bugzilla/Template.pm's create() function
    # for more things that you can set.
    $config->{VARIABLES}->{example_global_variable} = sub { return 'value' };
}

sub template_before_process {
    my ($self, $args) = @_;
    
    my ($vars, $file, $context) = @$args{qw(vars file context)};

    if ($file eq 'bug/edit.html.tmpl') {
        $vars->{'viewing_the_bug_form'} = 1;
    }
}

sub bug_check_can_change_field {
    my ($self, $args) = @_;

    my ($bug, $field, $new_value, $old_value, $priv_results)
        = @$args{qw(bug field new_value old_value priv_results)};

    my $user = Bugzilla->user;

    # Disallow a bug from being reopened if currently closed unless user 
    # is in 'admin' group
    if ($field eq 'bug_status' && $bug->product_obj->name eq 'Example') {
        if (!is_open_state($old_value) && is_open_state($new_value) 
            && !$user->in_group('admin')) 
        {
            push(@$priv_results, PRIVILEGES_REQUIRED_EMPOWERED);
            return;
        }
    }

    # Disallow a bug's keywords from being edited unless user is the
    # reporter of the bug 
    if ($field eq 'keywords' && $bug->product_obj->name eq 'Example' 
        && $user->login ne $bug->reporter->login) 
    {
        push(@$priv_results, PRIVILEGES_REQUIRED_REPORTER);
        return;
    }

    # Allow updating of priority even if user cannot normally edit the bug 
    # and they are in group 'engineering'
    if ($field eq 'priority' && $bug->product_obj->name eq 'Example'
        && $user->in_group('engineering')) 
    {
        push(@$priv_results, PRIVILEGES_REQUIRED_NONE);
        return;
    }
}

sub user_preferences {
    my ($self, $args) = @_;
    my $tab = $args->{current_tab};
    my $save = $args->{save_changes};
    my $handled = $args->{handled};

    return unless $tab eq 'my_tab';

    my $value = Bugzilla->input_params->{'example_pref'};
    if ($save) {
        # Validate your data and update the DB accordingly.
        $value =~ s/\s+/:/g;
    }
    $args->{'vars'}->{example_pref} = $value;

    # Set the 'handled' scalar reference to true so that the caller
    # knows the panel name is valid and that an extension took care of it.
    $$handled = 1;
}

sub webservice {
    my ($self, $args) = @_;

    my $dispatch = $args->{dispatch};
    $dispatch->{Example} = "Bugzilla::Extension::Example::WebService";
}

sub webservice_error_codes {
    my ($self, $args) = @_;
    
    my $error_map = $args->{error_map};
    $error_map->{'example_my_error'} = 10001;
}

# This must be the last line of your extension.
__PACKAGE__->NAME;