Bug 521373: Hook: object-before_create

Bugzilla/Hook.pm

@@ -585,6 +585,26 @@ Params:
 
 =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 page-before_template
 
 This is a simple way to add your own pages to Bugzilla. This hooks C<page.cgi>,

Bugzilla/Object.pm

@@ -24,6 +24,7 @@ use strict;
 package Bugzilla::Object;
 
 use Bugzilla::Constants;
+use Bugzilla::Hook;
 use Bugzilla::Util;
 use Bugzilla::Error;
 
@@ -399,6 +400,11 @@ sub _check_field {
 sub check_required_create_fields {
     my ($class, $params) = @_;
 
+    # This hook happens here so that even subclasses that don't call
+    # SUPER::create are still affected by the hook.
+    Bugzilla::Hook::process('object-before_create', { class => $class,
+                                                      params => $params });
+
     foreach my $field ($class->REQUIRED_CREATE_FIELDS) {
         ThrowCodeError('param_required',
             { function => "${class}->create", param => $field })

extensions/example/code/object-before_create.pl

+# -*- 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 Example Plugin.
+#
+# The Initial Developer of the Original Code is ITA Software
+# Portions created by the Initial Developer are Copyright (C) 2009 
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s): Max Kanat-Alexander <mkanat@bugzilla.org>
+
+use strict;
+use warnings;
+use Bugzilla;
+
+my $args = Bugzilla->hook_args;
+my $class = $args->{'class'};
+my $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(%$params));
+}