#!/usr/bin/perl

package main;
# PODNAME: koha-auth
# ABSTRACT: Generate authorities from bibliographic records
$main::VERSION = '0.054';
use 5.010;
use utf8;
use strict;
use warnings;

use diagnostics;
use Pod::Usage;
use Getopt::Long;

use Koha::Contrib::Tamil::Authority::FromBiblioTask;
use Koha::Contrib::Tamil::Authority::LoadFileTask;
use Koha::Contrib::Tamil::Authority::LinkBiblioTask;


binmode( STDOUT, ":utf8" );
binmode( STDERR, ":utf8" );

my $verbose     = 0;
my $help        = 0;
my $truncate    = 0;
my $doit        = 0;
GetOptions( 
    'verbose'   => \$verbose,
    'help'      => \$help,
    'truncate'  => \$truncate,
    'doit'      => \$doit,
);

usage() if $help;          

my $command = @ARGV ? shift : '';
if ( $command eq 'create_from_biblio' ) {
    usage() if $#ARGV != 1;
    my $conf_file = shift;
    my $authorities_file = shift;
    my $task = Koha::Contrib::Tamil::Authority::FromBiblioTask->new(
        conf_file => $conf_file,
        output    => $authorities_file,
        verbose   => 1,
    );
    $task->run();
}
elsif ( $command eq 'load_from_file' ) {
    usage() if $#ARGV != 1;
    my $conf_file = shift;
    my $authorities_file = shift;
    my $task = Koha::Contrib::Tamil::Authority::LoadFileTask->new(
        conf_file => $conf_file,
        file      => $authorities_file,
        truncate  => $truncate, 
        doit      => $doit,
        verbose   => 1,
    );
    $task->run();
}
elsif ( $command eq 'link_biblio_to' ) {
    usage() if $#ARGV != 0;
    my $conf_file = shift;
    my $task = Koha::Contrib::Tamil::Authority::LinkBiblioTask->new(
        conf_file => $conf_file,
        verbose   => 1,
        doit      => $doit,
    );
    $task->run();
}
else {
    usage();
}


sub usage {
    pod2usage( -verbose => 2 );
} 

__END__

=pod

=encoding UTF-8

=head1 NAME

koha-auth - Generate authorities from bibliographic records

=head1 VERSION

version 0.054

=head1 DESCRIPTION

With this script, it's possible to extract authorities from Koha bibliographic
records, load them into the authorities table, and link authorities to biblios.

=head1 USAGE

=over

=item koha-auth create_from_biblio F<auth.conf> F<authorities.txt>

Creates a text file F<authorities.txt> containing authorities extracted
from Koha biblio records using F<auth.conf> authorities configuration.

=item koha-auth [--truncate] [--doit] load_from_file F<auth.conf> 
F<authorities.txt>

Load authorities from F<authorities.txt> into Koha using F<auth.conf>
authorities configuration. With --truncate, auth_head Koha table is
truncated before loading new authorities. After this processing,
authorities have to be indexed with Zebra in order to be searchable. Without
--doit, the file processing is done but authorities are not effectively loaded
into Koha DB.

=item koha-auth link_biblio_to [--doit] F<auth.conf>

Link biblio records fields with authorities via $9 subfield.  Authorities must
have been indexed with Zebra.  After this processing, it is necessary to index
bibliographic records with Zebra. Without --doit, the processing is done, but
biblio records are not modified. This way you can check that authority heading
matching works properly.

=back

=head1 CONFIGURATION

Authorities configuration file looks like that:

 --- 
 authcode: NP
 authletters: abcd
 authtag: 200
 bibliotags: 
   - 700
   - 701
   - 702
 --- 
 authcode: CO
 authletters: abcd
 authtag: 210
 bibliotags: 
   - 710
   - 711
   - 712
 --- 

Two sample configuration files are provided with this distribution and can be
found in the dist local directory: F<auth-marc21.conf> and
F<auth-unimarc.conf>.

=head1 AUTHOR

Frédéric Demians <f.demians@tamil.fr>

=head1 COPYRIGHT AND LICENSE

This software is Copyright (c) 2018 by Fréderic Démians.

This is free software, licensed under:

  The GNU General Public License, Version 3, June 2007

=cut