#!/usr/bin/perl
# Small script that rebuilds the non-MARC DB
# Formerly named rebuildnonmarc.pl

use strict;
#use warnings; FIXME - Bug 2505

BEGIN {
    # find Koha's Perl modules
    # test carefully before changing this
    use FindBin ();
    eval { require "$FindBin::Bin/kohalib.pl" };
}

# Koha modules used
use Koha::Script;
use MARC::Record;
use C4::Charset;
use C4::Context;
use C4::Biblio qw(
    GetXmlBiblio
    TransformMarcToKoha
);
use Time::HiRes qw( gettimeofday );

use Getopt::Long qw( GetOptions );

my ($version, $confirm);
GetOptions(
    'c' => \$confirm,
    'h' => \$version
);

if ($version || (!$confirm)) {
    print <<EOF
This script rebuilds the non-MARC fields from the MARC values.
You can/must use it when you change your mapping.

Example: you decide to map biblio.title to 200\$a (it was previously mapped to 610\$a).
Run this script or you will have strange results in the UI!

Syntax:
\t./batchRebuildBiblioTables.pl -h (or without arguments => show this screen)
\t./batchRebuildBiblioTables.pl -c (c like confirm => rebuild non-MARC fields (may take long)
EOF
;
    exit;
}

$|=1; # non-buffered output

my $dbh = C4::Context->dbh;
my $i=0;
my $starttime = gettimeofday;
my $marcflavour = C4::Context->preference('marcflavour');
my $sth = $dbh->prepare('SELECT biblionumber, frameworkcode FROM biblio');
$sth->execute();

my @errors;
while (my ($biblionumber, $frameworkcode) = $sth->fetchrow) {
    my $marcxml = GetXmlBiblio($biblionumber);
    if (not defined $marcxml) {
        push @errors, $biblionumber;
        next;
    }

    $marcxml = C4::Charset::StripNonXmlChars( $marcxml );
    my $record = eval {
        MARC::Record::new_from_xml($marcxml, 'UTF-8', $marcflavour);
    };
    if ($@) {
        push @errors, $biblionumber;
        next;
    }

    my $biblio = TransformMarcToKoha($record);
    C4::Biblio::_koha_modify_biblio($dbh, $biblio, $frameworkcode);
    C4::Biblio::_koha_modify_biblioitem_nonmarc($dbh, $biblio);

    $i++;
    printf("%lu records processed in %.2f seconds\n", $i, gettimeofday() - $starttime) unless ($i % 100);
}

printf("\n%lu records processed in %.2f seconds\n", $i, gettimeofday() - $starttime);
if (scalar(@errors) > 0) {
    print "Some records could not be processed though: ", join(' ', @errors);
}