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# 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::Template::Plugin::Hook;
use 5.10.1;
use strict;
use warnings;
use base qw(Template::Plugin);
use Bugzilla::Constants;
use Bugzilla::Install::Util qw(template_include_path);
use Bugzilla::Util;
use Bugzilla::Error;
use File::Spec;
sub new {
my ($class, $context) = @_;
return bless { _CONTEXT => $context }, $class;
}
sub _context { return $_[0]->{_CONTEXT} }
sub process {
my ($self, $hook_name, $template) = @_;
my $context = $self->_context();
$template ||= $context->stash->{component}->{name};
# sanity check:
if (!$template =~ /[\w\.\/\-_\\]+/) {
ThrowCodeError('template_invalid', { name => $template });
}
my (undef, $path, $filename) = File::Spec->splitpath($template);
$path ||= '';
$filename =~ m/(.+)\.(.+)\.tmpl$/;
my $template_name = $1;
my $type = $2;
# Hooks are named like this:
my $extension_template = "$path$template_name-$hook_name.$type.tmpl";
# Get the hooks out of the cache if they exist. Otherwise, read them
# from the disk.
my $cache = Bugzilla->request_cache->{template_plugin_hook_cache} ||= {};
my $lang = $context->{bz_language} || '';
$cache->{"${lang}__$extension_template"}
||= $self->_get_hooks($extension_template);
# process() accepts an arrayref of templates, so we just pass the whole
# arrayref.
$context->{bz_in_hook} = 1; # See Bugzilla::Template::Context
return $context->process($cache->{"${lang}__$extension_template"});
}
sub _get_hooks {
my ($self, $extension_template) = @_;
my $template_sets = $self->_template_hook_include_path();
my @hooks;
foreach my $dir_set (@$template_sets) {
foreach my $template_dir (@$dir_set) {
my $file = "$template_dir/hook/$extension_template";
if (-e $file) {
my $template = $self->_context->template($file);
push(@hooks, $template);
# Don't run the hook for more than one language.
last;
}
}
}
return \@hooks;
}
sub _template_hook_include_path {
my $self = shift;
my $cache = Bugzilla->request_cache;
my $language = $self->_context->{bz_language} || '';
my $cache_key = "template_plugin_hook_include_path_$language";
$cache->{$cache_key} ||= template_include_path({
language => $language,
hook => 1,
});
return $cache->{$cache_key};
}
1;
__END__
=head1 NAME
Bugzilla::Template::Plugin::Hook
=head1 DESCRIPTION
Template Toolkit plugin to process hooks added into templates by extensions.
=head1 METHODS
=over
=item B<process>
=over
=item B<Description>
Processes hooks added into templates by extensions.
=item B<Params>
=over
=item C<hook_name>
The unique name of the template hook.
=item C<template> (optional)
The path of the calling template.
This is used as a work around to a bug which causes the path to the hook
to be incorrect when the hook is called from inside a block.
Example: If the hook C<lastrow> is added to the template
F<show-multiple.html.tmpl> and it is desired to force the correct template
path, the template hook would be:
[% Hook.process("lastrow", "bug/show-multiple.html.tmpl") %]
=back
=item B<Returns>
Output from processing template extension.
=back
=back
=head1 SEE ALSO
L<Template::Plugin>
L<https://bugzilla.readthedocs.io/en/latest/integrating/extensions.html>
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