C4/Barcodes/EAN13.pm

   1 package C4::Barcodes::EAN13;
   2
   3 # Copyright 2012 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 strict;
  21 use warnings;
  22
  23 use C4::Context;
  24 use C4::Debug;
  25
  26 use Algorithm::CheckDigits;
  27 use Carp;
  28
  29 use vars qw(@ISA);
  30 use vars qw($debug $cgi_debug); # from C4::Debug, of course
  31
  32 BEGIN {
  33     @ISA = qw(C4::Barcodes);
  34 }
  35
  36 sub parse {
  37     my $self = shift;
  38     my $barcode = (@_) ? shift : $self->value;
  39     my $ean = CheckDigits('ean');
  40     if ( $ean->is_valid($barcode) ) {
  41         return ( '', $ean->basenumber($barcode), $ean->checkdigit($barcode) );
  42     } else {
  43         carp "$barcode not valid EAN-13 barcode";
  44         return ( '', $barcode, '' );
  45     }
  46 }
  47
  48 sub process_tail {
  49     my ( $self,$tail,$whole,$specific ) = @_;
  50     my $ean = CheckDigits('ean');
  51     my $full = $ean->complete($whole);
  52     my $chk  = $ean->checkdigit($full);
  53     $debug && warn "# process_tail $tail -> $chk [$whole -> $full] $specific";
  54     return $chk;
  55 }
  56
  57 1;
  58 __END__