package Koha::Filter::MARC::TrimFields;

# Copyright 2023 Koha Development team

# 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>.

=head1 NAME

Koha::Filter::MARC::TrimFields - Trims MARC::Record object data fields.

=head1 SYNOPSIS

    my $p = Koha::RecordProcessor->new({ filters => ['TrimFields'] });

    my $metadata = Koha::Biblio::Metadatas->find($biblio_id);

    my $record   = $metadata->record;

    $p->process($record);

=head1 DESCRIPTION

Filter to trim MARC::Record object data fields.

=cut

use Modern::Perl;

use base qw(Koha::RecordProcessor::Base);

our $NAME = 'TrimFields';

=head2 filter

Trim MARC::Record object data fields.

=cut

sub filter {

    my ( $self, $record ) = @_;

    return

      unless $record and ref($record) eq 'MARC::Record';

    foreach my $field ( $record->fields ) {

        unless ( $field->is_control_field ) {

            foreach my $subfield ( $field->subfields ) {

                my $key   = $subfield->[0];

                my $value = $subfield->[1];

                $value =~ s/[\n\r]+/ /g;

                $value =~ s/^\s+|\s+$//g;

                $field->add_subfields( $key => $value ); # add subfield to the end of the subfield list

                $field->delete_subfield( pos => 0 ); # delete the subfield at the top of the subfield list

            }

        }

    }

    return $record;

}

1;

use Koha::RecordProcessor;