#!/usr/bin/perl

# Copyright 2014 ByWater Solutions
#
# This file is part of Koha.
#
# Koha is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
#
# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with Koha; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

use Modern::Perl;

use CGI qw(header);
use GD::Barcode;

use C4::Auth qw(check_cookie_auth);

=head1 NAME

    /cgi-bin/koha/svc/barcode

=head1 SYNOPSIS

This service generates a PNG barcode image for the requested barcode.

=head2 PARAMETERS

=over

=item I<barcode>

I<barcode> is the desired barcode. It should be called like:

=item I<type>

I<type> is the desired barcode type. Possible values are
Code39
UPCE
UPCA
QRcode
NW7
Matrix2of5
ITF
Industrial2of5
IATA2of5
EAN8
EAN13
COOP2of5

If ommited,it defaults to Code39.

=back

=head2 EXAMPLES

=over

=item /cgi-bin/koha/svc/barcode?barcode=123456789

Returns a Code39 barcode image for barcode 123456789

=item /cgi-bin/koha/svc/barcode?barcode=123456789&type=UPCE

Returns a UPCE barcode image for barcode 123456789

=cut

my $input = new CGI;

my ( $auth_status, $sessionID ) = check_cookie_auth( $input->cookie('CGISESSID'), { catalogue => '*' } );

if ( $auth_status ne "ok" ) {
    exit 0;
}

binmode(STDOUT);

my $type = $input->param('type') || 'Code39';
my $barcode = $input->param('barcode');
my $image;

eval {
    $image = GD::Barcode->new( $type, $barcode )->plot()->png();
};

if ( $@ ) {
    # problem creating image
    print header( -status => 500 );
} else {
    print header('image/png');
    print $image;
}

exit 0;

=head1 AUTHOR

Kyle M Hall <kyle@bywatersolutions.com>

=cut