Koha/Authorities.pm

   1 package Koha::Authorities;
   2
   3 # Copyright 2015 Koha Development Team
   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 Carp;
  23
  24 use Koha::Database;
  25
  26 use Koha::Authority;
  27
  28 use base qw(Koha::Objects);
  29
  30 =head1 NAME
  31
  32 Koha::Authorities - Koha Authority object set class
  33
  34 =head1 API
  35
  36 =head2 Class Methods
  37
  38 =head3 get_usage_count
  39
  40     $count = Koha::Authorities->get_usage_count({ authid => $i });
  41
  42     Returns the number of linked biblio records.
  43
  44     Note: Code originates from C4::AuthoritiesMarc::CountUsage.
  45
  46     This is a class method, since the authid may refer to a deleted record.
  47
  48 =cut
  49
  50 sub get_usage_count {
  51     my ( $class, $params ) = @_;
  52     my $authid = $params->{authid} || return;
  53
  54     my $searcher = Koha::SearchEngine::Search->new({ index => $Koha::SearchEngine::BIBLIOS_INDEX });
  55     my ( $err, $result, $count ) = $searcher->simple_search_compat( 'an:' . $authid, 0, 0 );
  56     if( $err ) {
  57         warn "Error: $err from search for " . $authid;
  58         return;
  59     }
  60     return $count;
  61 }
  62
  63 =head3 linked_biblionumbers
  64
  65     my @biblios = Koha::Authorities->linked_biblionumbers({
  66         authid => $id, [ max_results => $max ], [ offset => $offset ],
  67     });
  68
  69     Returns array of biblionumbers, as extracted from the result records of
  70     the search engine.
  71
  72     This is a class method, since the authid may refer to a deleted record.
  73
  74 =cut
  75
  76 sub linked_biblionumbers {
  77     my ( $self, $params ) = @_;
  78     my $authid = $params->{authid} || return;
  79
  80     my $searcher = Koha::SearchEngine::Search->new({ index => $Koha::SearchEngine::BIBLIOS_INDEX });
  81     # if max_results is undefined, we will get all results
  82     my ( $err, $result, $count ) = $searcher->simple_search_compat( 'an:' . $authid, $params->{offset} // 0, $params->{max_results} );
  83
  84     if( $err ) {
  85         warn "Error: $err from search for " . $authid;
  86         return;
  87     }
  88
  89     my @biblionumbers;
  90     foreach my $res ( @$result ) {
  91         my $bibno = $searcher->extract_biblionumber( $res );
  92         push @biblionumbers, $bibno if $bibno;
  93     }
  94     return @biblionumbers;
  95 }
  96
  97 =head3 type
  98
  99 =cut
 100
 101 sub _type {
 102     return 'AuthHeader';
 103 }
 104
 105 =head3 object_class
 106
 107 =cut
 108
 109 sub object_class {
 110     return 'Koha::Authority';
 111 }
 112
 113 1;