Koha/Plugins.pm

   1 package Koha::Plugins;
   2
   3 # Copyright 2012 Kyle Hall
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  19
  20 use Modern::Perl;
  21
  22 use Module::Load::Conditional qw(can_load);
  23 use Module::Pluggable search_path => ['Koha::Plugin'], except => qr/::Edifact(|::Line|::Message|::Order|::Segment|::Transport)$/;
  24 use List::MoreUtils qw( any );
  25
  26 use C4::Context;
  27 use C4::Output;
  28
  29 BEGIN {
  30     push @INC, C4::Context->config("pluginsdir");
  31     pop @INC if $INC[-1] eq '.';
  32 }
  33
  34 =head1 NAME
  35
  36 Koha::Plugins - Module for loading and managing plugins.
  37
  38 =cut
  39
  40 sub new {
  41     my ( $class, $args ) = @_;
  42
  43     return unless ( C4::Context->config("enable_plugins") || $args->{'enable_plugins'} );
  44
  45     $args->{'pluginsdir'} = C4::Context->config("pluginsdir");
  46
  47     return bless( $args, $class );
  48 }
  49
  50 =head2 GetPlugins
  51
  52 This will return a list of all available plugins, optionally limited by
  53 method or metadata value.
  54
  55     my @plugins = C4::Plugins::GetPlugins({
  56         method => 'some_method',
  57         metadata => { some_key => 'some_value' },
  58     });
  59
  60 The method and metadata parameters are optional.
  61 Available methods currently are: 'report', 'tool', 'to_marc', 'edifact'.
  62 If you pass multiple keys in the metadata hash, all keys must match.
  63
  64 =cut
  65
  66 sub GetPlugins {
  67     my ( $self, $params ) = @_;
  68     my $method = $params->{method};
  69     my $req_metadata = $params->{metadata} // {};
  70
  71     my @plugin_classes = $self->plugins();
  72     my @plugins;
  73
  74     foreach my $plugin_class (@plugin_classes) {
  75         if ( can_load( modules => { $plugin_class => undef } ) ) {
  76             next unless $plugin_class->isa('Koha::Plugins::Base');
  77
  78             my $plugin = $plugin_class->new({ enable_plugins => $self->{'enable_plugins'} });
  79
  80             # Limit results by method or metadata
  81             next if $method && !$plugin->can($method);
  82             my $plugin_metadata = $plugin->get_metadata;
  83             next if $plugin_metadata
  84                 and %$req_metadata
  85                 and any { !$plugin_metadata->{$_} || $plugin_metadata->{$_} ne $req_metadata->{$_} } keys %$req_metadata;
  86             push @plugins, $plugin;
  87         }
  88     }
  89     return @plugins;
  90 }
  91
  92 1;
  93 __END__
  94
  95 =head1 AUTHOR
  96
  97 Kyle M Hall <kyle.m.hall@gmail.com>
  98
  99 =cut