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 under the
   8 # terms of the GNU General Public License as published by the Free Software
   9 # Foundation; either version 2 of the License, or (at your option) any later
  10 # version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
  13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  14 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License along with
  17 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  18 # Suite 330, Boston, MA  02111-1307 USA
  19
  20 use XML::Simple;
  21 #use LWP::Simple;
  22 use C4::Biblio;
  23 use C4::Items;
  24
  25 use LWP::UserAgent;
  26 use HTTP::Request::Common;
  27
  28 use strict;
  29 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
  30
  31 BEGIN {
  32         require Exporter;
  33         $VERSION = 3.01;
  34         @ISA = qw(Exporter);
  35         @EXPORT_OK = qw(
  36                 &get_xisbns
  37                 &get_biblio_from_xisbn
  38         );
  39 }
  40
  41 =head1 NAME
  42
  43 C4::XISBN - Functions for retrieving XISBN content in Koha
  44
  45 =head1 FUNCTIONS
  46
  47 This module provides facilities for retrieving ThingISBN and XISBN content in Koha
  48
  49 =cut
  50
  51 sub get_biblio_from_xisbn {
  52     my $xisbn = shift;
  53     my $dbh = C4::Context->dbh;
  54     my $query = "SELECT biblionumber FROM biblioitems WHERE isbn=?";
  55     my $sth = $dbh->prepare($query);
  56     $sth->execute($xisbn);
  57     my $xbib_data =  $sth->fetchrow_hashref();
  58     my $xbiblio;
  59     if ($xbib_data->{biblionumber}) {
  60         $xbiblio = GetBiblioData($xbib_data->{biblionumber});
  61         $xbiblio->{items} = GetItemsByBiblioitemnumber($xbib_data->{biblionumber});
  62     }
  63     return ($xbiblio);
  64 }
  65
  66 =head1 get_xisbns($isbn);
  67
  68 =head2 $isbn is an ISBN string
  69
  70 =cut
  71
  72 sub get_xisbns {
  73     my ( $isbn ) = @_;
  74     my ($response,$thing_response,$xisbn_response,$gapines_response);
  75
  76     # THINGISBN
  77     if ( C4::Context->preference('ThingISBN') ) {
  78         my $url = "http://www.librarything.com/api/thingISBN/".$isbn;
  79         $thing_response = _get_url($url,'thingisbn');
  80     }
  81
  82     # XISBN
  83     if ( C4::Context->preference('XISBN') ) {
  84         my $affiliate_id=C4::Context->preference('OCLCAffiliateID');
  85         my $limit = C4::Context->preference('XISBNDailyLimit') || 499;
  86         my $reached_limit = _service_throttle('xisbn',$limit);
  87         my $url = "http://xisbn.worldcat.org/webservices/xid/isbn/".$isbn."?method=getEditions&format=xml&fl=form,year,lang,ed";
  88         $url.="&ai=".$affiliate_id if $affiliate_id;
  89         unless ($reached_limit) {
  90             $xisbn_response = _get_url($url,'xisbn');
  91         }
  92     }
  93
  94     # PINES ISBN (Experimental)
  95     #if ( C4::Context->preference('PINESISBN') ) {
  96     #    my $url = "http://www.librarything.com/api/thingISBN/".$isbn;
  97     #    $gapines_response = _get_url($url,'thingisbn');
  98     #}
  99     $response->{isbn} = [ @{ $xisbn_response->{isbn} or [] }, @{ $thing_response->{isbn} or [] }, @{ $gapines_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 $unique_xisbns->{ $response_data->{content} };
 106         $unique_xisbns->{ $response_data->{content} }++;
 107         my $xbiblio= get_biblio_from_xisbn($response_data->{content});
 108         push @xisbns, $xbiblio if $xbiblio; #response_data->{xbiblio}; #->{biblionumber}; # if $xbiblionumber;
 109     }
 110     return \@xisbns;
 111 }
 112
 113 sub _get_url {
 114     my ($url,$service_type) = @_;
 115     my $ua = LWP::UserAgent->new(
 116         timeout => 2
 117         );
 118
 119     my $response = $ua->get($url);
 120     if ($response->is_success) {
 121         warn "WARNING could not retrieve $service_type $url" unless $response;
 122         if ($response) {
 123             my $xmlsimple = XML::Simple->new();
 124             my $content = $xmlsimple->XMLin(
 125             $response->content,
 126             ForceArray => [ qw(isbn) ],
 127             ForceContent => 1,
 128             );
 129             return $content;
 130         }
 131     } else {
 132         warn "WARNING: URL Request Failed " . $response->status_line . "\n";
 133     }
 134
 135 }
 136
 137
 138 # Throttle services to the specified amount
 139 sub _service_throttle {
 140     my ($service_type,$daily_limit) = @_;
 141     my $dbh = C4::Context->dbh;
 142     my $sth = $dbh->prepare("SELECT service_count FROM services_throttle WHERE service_type=?");
 143     $sth->execute($service_type);
 144     my $count = 1;
 145
 146     while (my $counter = $sth->fetchrow_hashref()) {
 147         $count = $counter->{service_count} if $counter->{service_count};
 148     }
 149
 150     # we're over the limit
 151     return 1 if $count >= $daily_limit;
 152
 153     # not over the limit
 154     $count++;
 155     $sth = $dbh->do("UPDATE services_throttle SET service_count=$count WHERE service_type='xisbn'");
 156     return undef;
 157 }
 158
 159 1;
 160 __END__
 161
 162 =head1 NOTES
 163
 164 =head1 AUTHOR
 165
 166 Joshua Ferraro <jmf@liblime.com>
 167
 168 =cut
 169