C4/XISBN.pm

   1 package C4::XISBN;
   2 # Copyright (C) 2007 LibLime
   3 # Joshua Ferraro <jmf@liblime.com>
   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 XML::Simple;
  21 #use LWP::Simple;
  22 use C4::Biblio;
  23 use C4::Koha;
  24 use C4::Search;
  25 use C4::External::Syndetics qw(get_syndetics_editions);
  26 use LWP::UserAgent;
  27 use HTTP::Request::Common;
  28
  29 use Koha::Biblios;
  30 use Koha::SearchEngine;
  31 use Koha::SearchEngine::Search;
  32
  33 use strict;
  34 #use warnings; FIXME - Bug 2505
  35 use vars qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
  36
  37 BEGIN {
  38         require Exporter;
  39         @ISA = qw(Exporter);
  40         @EXPORT_OK = qw(
  41                 &get_xisbns
  42         );
  43 }
  44
  45 =head1 NAME
  46
  47 C4::XISBN - Functions for retrieving XISBN content in Koha
  48
  49 =head1 FUNCTIONS
  50
  51 This module provides facilities for retrieving ThingISBN and XISBN content in Koha
  52
  53 =cut
  54
  55 sub _get_biblio_from_xisbn {
  56     my $xisbn = shift;
  57     my $dbh = C4::Context->dbh;
  58
  59     my $searcher = Koha::SearchEngine::Search->new({index => $Koha::SearchEngine::BIBLIOS_INDEX});
  60     my ( $errors, $results, $total_hits ) = $searcher->simple_search_compat( "nb=$xisbn", 0, 1 );
  61     return unless ( !$errors && scalar @$results );
  62
  63     my $record = C4::Search::new_record_from_zebra( 'biblioserver', $results->[0] );
  64     my $biblionumber = C4::Biblio::TransformMarcToKohaOneField( 'biblio.biblionumber', $record );
  65     return unless $biblionumber;
  66
  67     my $biblio = Koha::Biblios->find( $biblionumber );
  68     return unless $biblio;
  69     my $isbn = $biblio->biblioitem->isbn;
  70     $biblio = $biblio->unblessed;
  71     $biblio->{normalized_isbn} = GetNormalizedISBN($isbn);
  72     return $biblio;
  73 }
  74
  75 =head1 get_xisbns($isbn);
  76
  77 =head2 $isbn is an ISBN string
  78
  79 =cut
  80
  81 sub get_xisbns {
  82     my ( $isbn ) = @_;
  83     my ($response,$thing_response,$syndetics_response,$errors);
  84     # THINGISBN
  85     if ( C4::Context->preference('ThingISBN') ) {
  86         my $url = "http://www.librarything.com/api/thingISBN/".$isbn;
  87         $thing_response = _get_url($url,'thingisbn');
  88     }
  89
  90         if ( C4::Context->preference("SyndeticsEnabled") && C4::Context->preference("SyndeticsEditions") ) {
  91         my $syndetics_preresponse = &get_syndetics_editions($isbn);
  92                 my @syndetics_response;
  93                 for my $response (@$syndetics_preresponse) {
  94                         push @syndetics_response, {content => $response->{a}};
  95                 }
  96                 $syndetics_response = {isbn => \@syndetics_response};
  97         }
  98
  99     $response->{isbn} = [ @{ $syndetics_response->{isbn} or [] }, @{ $thing_response->{isbn} or [] } ];
 100     my @xisbns;
 101     my $unique_xisbns; # a hashref
 102
 103     # loop through each ISBN and scope to the local collection
 104     for my $response_data( @{ $response->{ isbn } } ) {
 105         next if $response_data->{'content'} eq $isbn;
 106         next if $isbn eq $response_data;
 107         next if $unique_xisbns->{ $response_data->{content} };
 108         $unique_xisbns->{ $response_data->{content} }++;
 109         my $xbiblio= _get_biblio_from_xisbn($response_data->{content});
 110         push @xisbns, $xbiblio if $xbiblio;
 111     }
 112     if ( wantarray ) {
 113         return (\@xisbns, $errors);
 114     }
 115     else {
 116         return \@xisbns;
 117     }
 118 }
 119
 120 sub _get_url {
 121     my ($url,$service_type) = @_;
 122     my $ua = LWP::UserAgent->new(
 123         timeout => 2
 124         );
 125
 126     my $response = $ua->get($url);
 127     if ($response->is_success) {
 128         warn "WARNING could not retrieve $service_type $url" unless $response;
 129         if ($response) {
 130             my $xmlsimple = XML::Simple->new();
 131             my $content = $xmlsimple->XMLin(
 132             $response->content,
 133             ForceArray => [ qw(isbn) ],
 134             ForceContent => 1,
 135             );
 136             return $content;
 137         }
 138     } else {
 139         warn "WARNING: URL Request Failed " . $response->status_line . "\n";
 140     }
 141
 142 }
 143
 144
 145 # Throttle services to the specified amount
 146 sub _service_throttle {
 147     my ($service_type,$daily_limit) = @_;
 148     my $dbh = C4::Context->dbh;
 149     my $sth = $dbh->prepare(q{ SELECT service_count FROM services_throttle WHERE service_type=? });
 150     $sth->execute($service_type);
 151     my $count = 0;
 152
 153     if ($sth->rows == 0) {
 154         # initialize services throttle
 155         my $sth2 = $dbh->prepare(q{ INSERT INTO services_throttle (service_type, service_count) VALUES (?, ?) });
 156         $sth2->execute($service_type, $count);
 157     } else {
 158         $count = $sth->fetchrow_array;
 159     }
 160
 161     # we're over the limit
 162     return 1 if $count >= $daily_limit;
 163
 164     # not over the limit
 165     $count++;
 166     my $sth3 = $dbh->prepare(q{ UPDATE services_throttle SET service_count=? WHERE service_type=? });
 167     $sth3->execute($count, $service_type);
 168
 169     return undef;
 170 }
 171
 172 1;
 173 __END__
 174
 175 =head1 NOTES
 176
 177 =cut
 178
 179 =head1 AUTHOR
 180
 181 Joshua Ferraro <jmf@liblime.com>
 182
 183 =cut
 184