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 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
  17 # with Koha; if not, write to the Free Software Foundation, Inc.,
  18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  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($VERSION @ISA);
  30 use vars qw($debug $cgi_debug); # from C4::Debug, of course
  31
  32 BEGIN {
  33     $VERSION = 0.01;
  34     @ISA = qw(C4::Barcodes);
  35 }
  36
  37 sub parse {
  38     my $self = shift;
  39     my $barcode = (@_) ? shift : $self->value;
  40     my $ean = CheckDigits('ean');
  41     if ( $ean->is_valid($barcode) ) {
  42         return ( '', $ean->basenumber($barcode), $ean->checkdigit($barcode) );
  43     } else {
  44         carp "$barcode not valid EAN-13 barcode";
  45         return ( '', $barcode, '' );
  46     }
  47 }
  48
  49 sub process_tail {
  50     my ( $self,$tail,$whole,$specific ) = @_;
  51     my $ean = CheckDigits('ean');
  52     my $full = $ean->complete($whole);
  53     my $chk  = $ean->checkdigit($full);
  54     $debug && warn "# process_tail $tail -> $chk [$whole -> $full] $specific";
  55     return $chk;
  56 }
  57
  58 1;
  59 __END__