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,$thing_response,$xisbn_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     # XISBN
 100     if ( C4::Context->preference('XISBN') ) {
 101         my $affiliate_id=C4::Context->preference('OCLCAffiliateID');
 102         my $limit = C4::Context->preference('XISBNDailyLimit') || 999;
 103         my $reached_limit = _service_throttle('xisbn',$limit);
 104         my $url = "http://xisbn.worldcat.org/webservices/xid/isbn/".$isbn."?method=getEditions&format=xml&fl=form,year,lang,ed";
 105         $url.="&ai=".$affiliate_id if $affiliate_id;
 106         unless ($reached_limit) {
 107             $xisbn_response = _get_url($url,'xisbn');
 108         }
 109         $errors->{xisbn} = $xisbn_response->{ stat }
 110             if $xisbn_response->{ stat } ne 'ok';
 111     }
 112
 113     $response->{isbn} = [ @{ $xisbn_response->{isbn} or [] },  @{ $syndetics_response->{isbn} or [] }, @{ $thing_response->{isbn} or [] } ];
 114     my @xisbns;
 115     my $unique_xisbns; # a hashref
 116
 117     # loop through each ISBN and scope to the local collection
 118     for my $response_data( @{ $response->{ isbn } } ) {
 119         next if $response_data->{'content'} eq $isbn;
 120         next if $isbn eq $response_data;
 121         next if $unique_xisbns->{ $response_data->{content} };
 122         $unique_xisbns->{ $response_data->{content} }++;
 123         my $xbiblio= _get_biblio_from_xisbn($response_data->{content});
 124         push @xisbns, $xbiblio if $xbiblio;
 125     }
 126     if ( wantarray ) {
 127         return (\@xisbns, $errors);
 128     }
 129     else {
 130         return \@xisbns;
 131     }
 132 }
 133
 134 sub _get_url {
 135     my ($url,$service_type) = @_;
 136     my $ua = LWP::UserAgent->new(
 137         timeout => 2
 138         );
 139
 140     my $response = $ua->get($url);
 141     if ($response->is_success) {
 142         warn "WARNING could not retrieve $service_type $url" unless $response;
 143         if ($response) {
 144             my $xmlsimple = XML::Simple->new();
 145             my $content = $xmlsimple->XMLin(
 146             $response->content,
 147             ForceArray => [ qw(isbn) ],
 148             ForceContent => 1,
 149             );
 150             return $content;
 151         }
 152     } else {
 153         warn "WARNING: URL Request Failed " . $response->status_line . "\n";
 154     }
 155
 156 }
 157
 158
 159 # Throttle services to the specified amount
 160 sub _service_throttle {
 161     my ($service_type,$daily_limit) = @_;
 162     my $dbh = C4::Context->dbh;
 163     my $sth = $dbh->prepare(q{ SELECT service_count FROM services_throttle WHERE service_type=? });
 164     $sth->execute($service_type);
 165     my $count = 0;
 166
 167     if ($sth->rows == 0) {
 168         # initialize services throttle
 169         my $sth2 = $dbh->prepare(q{ INSERT INTO services_throttle (service_type, service_count) VALUES (?, ?) });
 170         $sth2->execute($service_type, $count);
 171     } else {
 172         $count = $sth->fetchrow_array;
 173     }
 174
 175     # we're over the limit
 176     return 1 if $count >= $daily_limit;
 177
 178     # not over the limit
 179     $count++;
 180     my $sth3 = $dbh->prepare(q{ UPDATE services_throttle SET service_count=? WHERE service_type=? });
 181     $sth3->execute($count, $service_type);
 182
 183     return undef;
 184 }
 185
 186 1;
 187 __END__
 188
 189 =head1 NOTES
 190
 191 =cut
 192
 193 =head1 AUTHOR
 194
 195 Joshua Ferraro <jmf@liblime.com>
 196
 197 =cut
 198