#!/usr/bin/perl

# Copyright (c) 2012 Equinox Software, Inc.
# 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, see <http://www.gnu.org/licenses>.

use strict;
use warnings;
use 5.010;

use Koha::Indexer::Utils;

use Getopt::Long;

my $input_file;
my $output_file;
my $want_help;
my $result = GetOptions(
    'input:s'      => \$input_file,
    'output:s'     => \$output_file,
    'help|h'       => \$want_help,
);

if ( not $result or $want_help or not defined $input_file or not defined $output_file ) {
    print_usage();
    exit 0;
}

open my $infh,  '<', $input_file or die "$0: cannot open input file $input_file: $!\n";
open my $outfh, '>', $output_file or die "$0: cannot open output file $output_file: $!\n";

my $grs1_cfg = join('', <$infh>);
close $infh;
my $dom_cfg = Koha::Indexer::Utils::zebra_record_abs_to_dom($grs1_cfg);
print $outfh $dom_cfg;
close $outfh;

sub print_usage {
    print <<_USAGE_;
$0: generate a DOM filter Zebra index config from a GRS-1 config

Given a Zebra record.abs file containing a set of index definitions for
Zebra's GRS-1 filter, write an equivalent DOM filter configuration.

To generate the XSLT that is to be used by Zebra, run something like
the following on the output of this utility:

xsltproc ZEBRA_CFG_DIR/xsl/koha-indexdefs-to-zebra.xsl \\
  biblio-koha-indexdefs.xml \\
  > ZEBRA_CFG_DIR/marc_defs/marc21/biblios/biblio-zebra-indexdefs.xsl

The above example assumes that the output of the program was named
biblio-koha-indexdefs.xsl.

Parameters:
    --input                 input file name
    --output                output file name
    --help or -h            show this message
_USAGE_
}