use HTTP::Request::Common;
use strict;
+use warnings;
use vars qw($VERSION @ISA @EXPORT);
This module provides facilities for retrieving Amazon.com content in Koha
-=head1 get_amazon_details($isbn);
+=head2 get_amazon_details
-=head2 $isbn is a isbn string
+=over 4
+
+my $amazon_details = &get_amazon_details( $xisbn, $record, $marcflavour );
+Get editorial reviews, customer reviews, and similar products using Amazon Web Services.
=cut
sub get_amazon_details {
- my ( $isbn ) = @_;
+ my ( $isbn, $record, $marcflavour ) = @_;
+
#normalize the ISBN
- $isbn =~ /(\d*[X]*)/;
- $isbn = $1;
+ $isbn = _normalize_match_point ($isbn);
+
+ my $upc = _get_amazon_upc($record,$marcflavour);
+ my $ean = _get_amazon_ean($record,$marcflavour);
+
+ # warn "ISBN: $isbn | UPC: $upc | EAN: $ean";
+
+ my ( $id_type, $item_id);
+ if (length($isbn) eq 13) { # if the isbn is 13-digit, search Amazon using EAN
+ $id_type = 'EAN';
+ $item_id = $isbn;
+ }
+ elsif ($isbn) {
+ $id_type = 'ASIN';
+ $item_id = $isbn;
+ }
+ elsif ($upc) {
+ $id_type = 'UPC';
+ $item_id = $upc;
+ }
+ elsif ($ean) {
+ $id_type = 'EAN';
+ $item_id = $upc;
+ }
+ else { # if no ISBN, UPC, or EAN exists, do not even attempt to query Amazon
+ return undef;
+ }
+
+ my $format = substr $record->leader(), 6, 1; # grab the item format to determine Amazon search index
+ my $formats;
+ $formats->{'a'} = 'Books';
+ $formats->{'g'} = 'Video';
+ $formats->{'j'} = 'Music';
+
+ my $search_index = $formats->{$format};
# Determine which content to grab in the request
#grab the associates tag: mine is 'kadabox-20'
my $af_tag=C4::Context->preference('AmazonAssocTag');
- my $response_group = "Similarities,EditorialReview,Reviews,ItemAttributes";
- my $asin=$isbn;
- my $url = "http://ecs.amazonaws$tld/onca/xml?Service=AWSECommerceService&AWSAccessKeyId=$aws_access_key_id&Operation=ItemLookup&AssociateTag=$af_tag&Version=2007-01-15&ItemId=$asin&ResponseGroup=$response_group";
+ my $response_group = "Similarities,EditorialReview,Reviews,ItemAttributes,Images";
+ my $url = "http://ecs.amazonaws$tld/onca/xml?Service=AWSECommerceService&AWSAccessKeyId=$aws_access_key_id&Operation=ItemLookup&AssociateTag=$af_tag&Version=2007-01-15&ItemId=$item_id&IdType=$id_type&ResponseGroup=$response_group";
+ if ($id_type ne 'ASIN') {
+ $url .= "&SearchIndex=$search_index";
+ }
# warn $url;
my $content = get($url);
warn "could not retrieve $url" unless $content;
return $available;
}
+sub _get_amazon_upc {
+ my ($record,$marcflavour) = @_;
+ my (@fields,$upc);
+
+ if ($marcflavour eq 'MARC21') {
+ @fields = $record->field('024');
+ foreach my $field (@fields) {
+ my $indicator = $field->indicator(1);
+ my $upc = _normalize_match_point($field->subfield('a'));
+ if ($indicator == 1 and $upc ne '') {
+ return $upc;
+ }
+ }
+ }
+ else { # assume unimarc if not marc21
+ @fields = $record->field('072');
+ foreach my $field (@fields) {
+ my $upc = _normalize_match_point($field->subfield('a'));
+ if ($upc ne '') {
+ return $upc;
+ }
+ }
+ }
+}
+
+sub _get_amazon_ean {
+ my ($record,$marcflavour) = @_;
+ my (@fields,$ean);
+
+ if ($marcflavour eq 'MARC21') {
+ @fields = $record->field('024');
+ foreach my $field (@fields) {
+ my $indicator = $field->indicator(1);
+ my $upc = _normalize_match_point($field->subfield('a'));
+ if ($indicator == 3 and $upc ne '') {
+ return $upc;
+ }
+ }
+ }
+ else { # assume unimarc if not marc21
+ @fields = $record->field('073');
+ foreach my $field (@fields) {
+ my $upc = _normalize_match_point($field->subfield('a'));
+ if ($upc ne '') {
+ return $upc;
+ }
+ }
+ }
+}
+
+sub _normalize_match_point {
+ my $match_point = shift;
+ (my $normalized_match_point) = $match_point =~ /([\d-]*[X]*)/;
+ $normalized_match_point =~ s/-//g;
+
+ return $normalized_match_point;
+}
+
1;
__END__