Koha/REST/Plugin/Objects.pm

   1 package Koha::REST::Plugin::Objects;
   2
   3 # This file is part of Koha.
   4 #
   5 # Koha is free software; you can redistribute it and/or modify it under the
   6 # terms of the GNU General Public License as published by the Free Software
   7 # Foundation; either version 3 of the License, or (at your option) any later
   8 # version.
   9 #
  10 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
  11 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  12 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License along
  15 # with Koha; if not, write to the Free Software Foundation, Inc.,
  16 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17
  18 use Modern::Perl;
  19
  20 use Mojo::Base 'Mojolicious::Plugin';
  21
  22 =head1 NAME
  23
  24 Koha::REST::Plugin::Objects
  25
  26 =head1 API
  27
  28 =head2 Helper methods
  29
  30 =head3 objects.search
  31
  32     my $patrons_set = Koha::Patrons->new;
  33     my $patrons = $c->objects->search( $patrons_set, [\&to_model, \&to_api] );
  34
  35 Performs a database search using given Koha::Objects object and query parameters.
  36 It (optionally) applies the I<$to_model> function reference before building the
  37 query itself, and (optionally) applies I<$to_api> to the result.
  38
  39 Returns an arrayref of the hashrefs representing the resulting objects
  40 for JSON rendering.
  41
  42 Note: Make sure I<$to_model> and I<$to_api> don't autovivify keys.
  43
  44 =cut
  45
  46 sub register {
  47     my ( $self, $app ) = @_;
  48
  49     $app->helper(
  50         'objects.search' => sub {
  51             my ( $c, $objects_set, $to_model, $to_api ) = @_;
  52
  53             my $args = $c->validation->output;
  54             my $attributes = {};
  55
  56             # Extract reserved params
  57             my ( $filtered_params, $reserved_params ) = $c->extract_reserved_params($args);
  58
  59             # Merge sorting into query attributes
  60             $c->dbic_merge_sorting(
  61                 {
  62                     attributes => $attributes,
  63                     params     => $reserved_params,
  64                     to_model   => $to_model
  65                 }
  66             );
  67
  68             # Merge pagination into query attributes
  69             $c->dbic_merge_pagination(
  70                 {
  71                     filter => $attributes,
  72                     params => $reserved_params
  73                 }
  74             );
  75
  76             # Call the to_model function by reference, if defined
  77             if ( defined $filtered_params ) {
  78
  79                 # Apply the mapping function to the passed params
  80                 $filtered_params = $to_model->($filtered_params)
  81                   if defined $to_model;
  82                 $filtered_params = $c->build_query_params( $filtered_params, $reserved_params );
  83             }
  84
  85             # Perform search
  86             my $objects = $objects_set->search( $filtered_params, $attributes );
  87
  88             if ($objects->is_paged) {
  89                 $c->add_pagination_headers({
  90                     total => $objects->pager->total_entries,
  91                     params => $args,
  92                 });
  93             }
  94
  95             my @objects_list = map {
  96                 ( defined $to_api )
  97                   ? $to_api->( $_->TO_JSON )
  98                   : $_->TO_JSON
  99             } $objects->as_list;
 100
 101             return \@objects_list;
 102         }
 103     );
 104 }
 105
 106 1;