Nick Clemens
2f61afa9c5
To test: 1 - Define a new MARC Modification template with actions: Copy field 600$a to 942$0 2 - Define a new record like: LDR 00334nam a22001217a 4500 003 ff 005 20201102111604.0 008 201102b xxu||||| |||| 00| 0 eng d 040 _ _ ‡cvsd 100 1 _ ‡012345‡aKnuth, Donal Ervin‡d1938 245 _ _ ‡012345‡aThe aty of computer programming‡cDonald E. Knuth 600 _ 0 ‡042‡aComputer programming‡9462 3 - Modify this record using the template above 4 - Note that entire field is copied to 942 5 - Apply patch 6 - Now only subfield 0 is copied Signed-off-by: David Nind <david@davidnind.com> Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl> Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
667 lines
20 KiB
Perl
667 lines
20 KiB
Perl
package Koha::SimpleMARC;
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# Copyright 2009 Kyle M. Hall <kyle.m.hall@gmail.com>
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# Koha is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# Koha is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Koha; if not, see <http://www.gnu.org/licenses>.
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use Modern::Perl;
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our (@ISA, @EXPORT_OK);
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BEGIN {
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require Exporter;
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our @ISA = qw(Exporter);
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@EXPORT_OK = qw(
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read_field
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add_field
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update_field
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copy_field
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copy_and_replace_field
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move_field
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delete_field
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field_exists
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field_equals
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);
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}
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=head1 NAME
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SimpleMARC - Perl module for making simple MARC record alterations.
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=head1 SYNOPSIS
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use SimpleMARC;
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=head1 DESCRIPTION
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SimpleMARC is designed to make writing scripts
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to modify MARC records simple and easy.
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Every function in the modules requires a
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MARC::Record object as its first parameter.
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=head1 AUTHOR
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Kyle Hall <lt>kyle.m.hall@gmail.com<gt>
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=head1 COPYRIGHT AND LICENSE
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Copyright (C) 2009 by Kyle Hall
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This library is free software; you can redistribute it and/or modify
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it under the same terms as Perl itself, either Perl version 5.8.7 or,
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at your option, any later version of Perl 5 you may have available.
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=head1 FUNCTIONS
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=head2 copy_field
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copy_field( $record, $fromFieldName, $fromSubfieldName, $toFieldName, $toSubfieldName[, $regex[, $n ] ] );
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Copies a value from one field to another. If a regular expression ( $regex ) is supplied,
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the value will be transformed by the given regex before being copied into the new field.
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Example: $regex = { search => 'Old Text', replace => 'Replacement Text', modifiers => 'g' };
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If $n is passed, copy_field will only copy the Nth field of the list of fields.
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E.g. $n = 1 will only use the first field's value, $n = 2 will use only the 2nd field's value.
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=cut
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sub copy_field {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fromFieldName = $params->{from_field};
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my $fromSubfieldName = $params->{from_subfield};
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my $toFieldName = $params->{to_field};
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my $toSubfieldName = $params->{to_subfield};
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my $regex = $params->{regex};
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my $field_numbers = $params->{field_numbers} // [];
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if ( ! ( $record && $fromFieldName && $toFieldName ) ) { return; }
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if ( not defined $fromSubfieldName
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or $fromSubfieldName eq ''
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or not defined $toSubfieldName
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or $toSubfieldName eq '' ) {
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_copy_move_field(
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{ record => $record,
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from_field => $fromFieldName,
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to_field => $toFieldName,
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regex => $regex,
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field_numbers => $field_numbers,
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action => 'copy',
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}
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);
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} else {
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_copy_move_subfield(
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{ record => $record,
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from_field => $fromFieldName,
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from_subfield => $fromSubfieldName,
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to_field => $toFieldName,
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to_subfield => $toSubfieldName,
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regex => $regex,
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field_numbers => $field_numbers,
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action => 'copy',
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}
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);
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}
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}
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sub copy_and_replace_field {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fromFieldName = $params->{from_field};
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my $fromSubfieldName = $params->{from_subfield};
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my $toFieldName = $params->{to_field};
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my $toSubfieldName = $params->{to_subfield};
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my $regex = $params->{regex};
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my $field_numbers = $params->{field_numbers} // [];
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if ( ! ( $record && $fromFieldName && $toFieldName ) ) { return; }
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if ( !defined $fromSubfieldName or $fromSubfieldName eq ''
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or !defined $toSubfieldName or $toSubfieldName eq ''
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) {
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_copy_move_field(
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{ record => $record,
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from_field => $fromFieldName,
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to_field => $toFieldName,
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regex => $regex,
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field_numbers => $field_numbers,
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action => 'replace',
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}
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);
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} else {
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_copy_move_subfield(
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{ record => $record,
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from_field => $fromFieldName,
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from_subfield => $fromSubfieldName,
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to_field => $toFieldName,
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to_subfield => $toSubfieldName,
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regex => $regex,
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field_numbers => $field_numbers,
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action => 'replace',
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}
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);
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}
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}
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sub update_field {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fieldName = $params->{field};
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my $subfieldName = $params->{subfield};
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my @values = @{ $params->{values} };
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my $field_numbers = $params->{field_numbers} // [];
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if ( ! ( $record && $fieldName ) ) { return; }
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if ( not defined $subfieldName or $subfieldName eq '' ) {
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# FIXME I'm not sure the actual implementation is correct.
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die "This action is not implemented yet";
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#_update_field({ record => $record, field => $fieldName, values => \@values });
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} else {
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_update_subfield({ record => $record, field => $fieldName, subfield => $subfieldName, values => \@values, field_numbers => $field_numbers });
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}
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}
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=head2 add_field
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add_field({
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record => $record,
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field => $fieldName,
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subfield => $subfieldName,
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values => \@values,
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field_numbers => $field_numbers,
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});
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Adds a new field/subfield with supplied value(s).
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This function always add a new field as opposed to 'update_field' which will
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either update if field exists and add if it does not.
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=cut
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sub add_field {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fieldName = $params->{field};
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my $subfieldName = $params->{subfield};
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my @values = @{ $params->{values} };
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my $field_numbers = $params->{field_numbers} // [];
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if ( ! ( $record && $fieldName ) ) { return; }
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if ( $fieldName > 10 ) {
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foreach my $value ( @values ) {
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my $field = MARC::Field->new( $fieldName, '', '', "$subfieldName" => $value );
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$record->append_fields( $field );
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}
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} else {
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foreach my $value ( @values ) {
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my $field = MARC::Field->new( $fieldName, $value );
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$record->append_fields( $field );
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}
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}
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}
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sub _update_field {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fieldName = $params->{field};
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my @values = @{ $params->{values} };
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my $i = 0;
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if ( my @fields = $record->field( $fieldName ) ) {
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@values = ($values[0]) x scalar( @fields )
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if @values == 1;
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foreach my $field ( @fields ) {
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$field->update( $values[$i++] );
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}
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} else {
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## Field does not exists, create it
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if ( $fieldName < 10 ) {
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foreach my $value ( @values ) {
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my $field = MARC::Field->new( $fieldName, $value );
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$record->append_fields( $field );
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}
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} else {
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warn "Invalid operation, trying to add a new field without subfield";
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}
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}
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}
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sub _update_subfield {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fieldName = $params->{field};
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my $subfieldName = $params->{subfield};
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my @values = @{ $params->{values} };
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my $dont_erase = $params->{dont_erase};
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my $field_numbers = $params->{field_numbers} // [];
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my $i = 0;
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my @fields = $record->field( $fieldName );
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if ( @$field_numbers ) {
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@fields = map { $_ <= @fields ? $fields[ $_ - 1 ] : () } @$field_numbers;
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}
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if ( @fields ) {
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unless ( $dont_erase ) {
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@values = ($values[0]) x scalar( @fields )
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if @values == 1;
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foreach my $field ( @fields ) {
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$field->update( "$subfieldName" => $values[$i++] );
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}
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}
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if ( $i <= scalar ( @values ) - 1 ) {
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foreach my $field ( @fields ) {
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foreach my $j ( $i .. scalar( @values ) - 1) {
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$field->add_subfields( "$subfieldName" => $values[$j] );
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}
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}
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}
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} else {
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## Field does not exist, create it.
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foreach my $value ( @values ) {
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my $field = MARC::Field->new( $fieldName, '', '', "$subfieldName" => $values[$i++] );
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$record->append_fields( $field );
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}
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}
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}
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=head2 read_field
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my @values = read_field( $record, $fieldName[, $subfieldName, [, $n ] ] );
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Returns an array of field values for the given field and subfield
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If $n is given, it will return only the $nth value of the array.
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E.g. If $n = 1, it return the 1st value, if $n = 3, it will return the 3rd value.
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=cut
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sub read_field {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fieldName = $params->{field};
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my $subfieldName = $params->{subfield};
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my $field_numbers = $params->{field_numbers} // [];
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if ( not defined $subfieldName or $subfieldName eq '' ) {
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_read_field({ record => $record, field => $fieldName, field_numbers => $field_numbers });
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} else {
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_read_subfield({ record => $record, field => $fieldName, subfield => $subfieldName, field_numbers => $field_numbers });
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}
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}
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sub _read_field {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fieldName = $params->{field};
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my $field_numbers = $params->{field_numbers} // [];
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my @fields = $record->field( $fieldName );
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return unless @fields;
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return map { $_->data() } @fields
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if $fieldName < 10;
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my @values;
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if ( @$field_numbers ) {
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for my $field_number ( @$field_numbers ) {
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if ( $field_number <= scalar( @fields ) ) {
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for my $sf ( $fields[$field_number - 1]->subfields ) {
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push @values, $sf->[1];
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}
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}
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}
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} else {
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foreach my $field ( @fields ) {
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for my $sf ( $field->subfields ) {
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push @values, $sf->[1];
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}
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}
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}
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return @values;
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}
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sub _read_subfield {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fieldName = $params->{field};
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my $subfieldName = $params->{subfield};
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my $field_numbers = $params->{field_numbers} // [];
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my @fields = $record->field( $fieldName );
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return unless @fields;
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my @values;
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foreach my $field ( @fields ) {
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my @sf = $field->subfield( $subfieldName );
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push( @values, @sf );
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}
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if ( @values and @$field_numbers ) {
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@values = map { $_ <= @values ? $values[ $_ - 1 ] : () } @$field_numbers;
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}
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return @values;
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}
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=head2 field_exists
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@field_numbers = field_exists( $record, $fieldName[, $subfieldName ]);
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Returns the field numbers or an empty array.
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=cut
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sub field_exists {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fieldName = $params->{field};
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my $subfieldName = $params->{subfield};
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if ( ! $record ) { return; }
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my @field_numbers = ();
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my $current_field_number = 1;
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for my $field ( $record->field( $fieldName ) ) {
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if ( $subfieldName ) {
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push @field_numbers, $current_field_number
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if $field->subfield( $subfieldName );
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} else {
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push @field_numbers, $current_field_number;
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}
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$current_field_number++;
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}
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return \@field_numbers;
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}
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=head2 field_equals
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$bool = field_equals( $record, $value, $fieldName[, $subfieldName[, $regex ] ]);
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Returns true if the field equals the given value, false otherwise.
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If a regular expression ( $regex ) is supplied, the value will be compared using
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the given regex. Example: $regex = 'sought_text'
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=cut
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sub field_equals {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $value = $params->{value};
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my $fieldName = $params->{field};
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my $subfieldName = $params->{subfield};
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my $is_regex = $params->{is_regex};
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if ( ! $record ) { return; }
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my @field_numbers = ();
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my $current_field_number = 1;
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FIELDS: for my $field ( $record->field( $fieldName ) ) {
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my @subfield_values;
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if ( $field->is_control_field ) {
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push @subfield_values, $field->data;
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} else {
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@subfield_values =
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$subfieldName
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? $field->subfield($subfieldName)
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: map { $_->[1] } $field->subfields;
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}
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SUBFIELDS: for my $subfield_value ( @subfield_values ) {
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if (
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(
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$is_regex and $subfield_value =~ m/$value/
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) or (
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$subfield_value eq $value
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)
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) {
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push @field_numbers, $current_field_number;
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last SUBFIELDS;
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}
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}
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$current_field_number++;
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}
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return \@field_numbers;
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}
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=head2 move_field
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move_field( $record, $fromFieldName, $fromSubfieldName, $toFieldName, $toSubfieldName[, $regex [, $n ] ] );
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Moves a value from one field to another. If a regular expression ( $regex ) is supplied,
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the value will be transformed by the given regex before being moved into the new field.
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Example: $regex = 's/Old Text/Replacement Text/'
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If $n is passed, only the Nth field will be moved. $n = 1
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will move the first repeatable field, $n = 3 will move the third.
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=cut
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sub move_field {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fromFieldName = $params->{from_field};
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my $fromSubfieldName = $params->{from_subfield};
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my $toFieldName = $params->{to_field};
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my $toSubfieldName = $params->{to_subfield};
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my $regex = $params->{regex};
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my $field_numbers = $params->{field_numbers} // [];
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if ( !defined $fromSubfieldName
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or $fromSubfieldName eq ''
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or !defined $toSubfieldName
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or $toSubfieldName eq '' ) {
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_copy_move_field(
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{ record => $record,
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from_field => $fromFieldName,
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to_field => $toFieldName,
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regex => $regex,
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field_numbers => $field_numbers,
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action => 'move',
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}
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);
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} else {
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_copy_move_subfield(
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{ record => $record,
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from_field => $fromFieldName,
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from_subfield => $fromSubfieldName,
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to_field => $toFieldName,
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to_subfield => $toSubfieldName,
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regex => $regex,
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field_numbers => $field_numbers,
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action => 'move',
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}
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);
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}
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}
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=head2 _delete_field
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_delete_field( $record, $fieldName[, $subfieldName [, $n ] ] );
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Deletes the given field.
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If $n is passed, only the Nth field will be deleted. $n = 1
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will delete the first repeatable field, $n = 3 will delete the third.
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=cut
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sub delete_field {
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my ( $params ) = @_;
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my $record = $params->{record};
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my $fieldName = $params->{field};
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my $subfieldName = $params->{subfield};
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my $field_numbers = $params->{field_numbers} // [];
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if ( !defined $subfieldName or $subfieldName eq '' ) {
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_delete_field({ record => $record, field => $fieldName, field_numbers => $field_numbers });
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} else {
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_delete_subfield({ record => $record, field => $fieldName, subfield => $subfieldName, field_numbers => $field_numbers });
|
|
}
|
|
}
|
|
|
|
sub _delete_field {
|
|
my ( $params ) = @_;
|
|
my $record = $params->{record};
|
|
my $fieldName = $params->{field};
|
|
my $field_numbers = $params->{field_numbers} // [];
|
|
|
|
my @fields = $record->field( $fieldName );
|
|
|
|
if ( @$field_numbers ) {
|
|
@fields = map { $_ <= @fields ? $fields[ $_ - 1 ] : () } @$field_numbers;
|
|
}
|
|
foreach my $field ( @fields ) {
|
|
$record->delete_field( $field );
|
|
}
|
|
}
|
|
|
|
sub _delete_subfield {
|
|
my ( $params ) = @_;
|
|
my $record = $params->{record};
|
|
my $fieldName = $params->{field};
|
|
my $subfieldName = $params->{subfield};
|
|
my $field_numbers = $params->{field_numbers} // [];
|
|
|
|
my @fields = $record->field( $fieldName );
|
|
|
|
if ( @$field_numbers ) {
|
|
@fields = map { $_ <= @fields ? $fields[ $_ - 1 ] : () } @$field_numbers;
|
|
}
|
|
|
|
foreach my $field ( @fields ) {
|
|
$field->delete_subfield( code => $subfieldName );
|
|
$record->delete_field( $field ) unless $field->subfields();
|
|
}
|
|
}
|
|
|
|
|
|
sub _copy_move_field {
|
|
my ( $params ) = @_;
|
|
my $record = $params->{record};
|
|
my $fromFieldName = $params->{from_field};
|
|
my $toFieldName = $params->{to_field};
|
|
my $regex = $params->{regex};
|
|
my $field_numbers = $params->{field_numbers} // [];
|
|
my $action = $params->{action} || 'copy';
|
|
|
|
my @from_fields = $record->field( $fromFieldName );
|
|
if ( @$field_numbers ) {
|
|
@from_fields = map { $_ <= @from_fields ? $from_fields[ $_ - 1 ] : () } @$field_numbers;
|
|
}
|
|
|
|
my @new_fields;
|
|
for my $from_field ( @from_fields ) {
|
|
my $new_field = $from_field->clone;
|
|
$new_field->{_tag} = $toFieldName; # Should be replaced by set_tag, introduced by MARC::Field 2.0.4
|
|
if ( $regex and $regex->{search} ) {
|
|
for my $subfield ( $new_field->subfields ) {
|
|
my $value = $subfield->[1];
|
|
( $value ) = _modify_values({ values => [ $value ], regex => $regex });
|
|
$new_field->update( $subfield->[0], $value );
|
|
}
|
|
}
|
|
if ( $action eq 'move' ) {
|
|
$record->delete_field( $from_field )
|
|
}
|
|
elsif ( $action eq 'replace' ) {
|
|
my @to_fields = $record->field( $toFieldName );
|
|
if ( @to_fields ) {
|
|
$record->delete_field( $to_fields[0] );
|
|
}
|
|
}
|
|
push @new_fields, $new_field;
|
|
}
|
|
$record->append_fields( @new_fields );
|
|
}
|
|
|
|
sub _copy_move_subfield {
|
|
my ( $params ) = @_;
|
|
my $record = $params->{record};
|
|
my $fromFieldName = $params->{from_field};
|
|
my $fromSubfieldName = $params->{from_subfield};
|
|
my $toFieldName = $params->{to_field};
|
|
my $toSubfieldName = $params->{to_subfield};
|
|
my $regex = $params->{regex};
|
|
my $field_numbers = $params->{field_numbers} // [];
|
|
my $action = $params->{action} || 'copy';
|
|
|
|
my @values = read_field({ record => $record, field => $fromFieldName, subfield => $fromSubfieldName });
|
|
if ( @$field_numbers ) {
|
|
@values = map { $_ <= @values ? $values[ $_ - 1 ] : () } @$field_numbers;
|
|
}
|
|
_modify_values({ values => \@values, regex => $regex });
|
|
my $dont_erase = $action eq 'copy' ? 1 : 0;
|
|
_update_subfield({ record => $record, field => $toFieldName, subfield => $toSubfieldName, values => \@values, dont_erase => $dont_erase });
|
|
|
|
# And delete if it's a move
|
|
if ( $action eq 'move' ) {
|
|
_delete_subfield({
|
|
record => $record,
|
|
field => $fromFieldName,
|
|
subfield => $fromSubfieldName,
|
|
field_numbers => $field_numbers,
|
|
});
|
|
}
|
|
}
|
|
|
|
sub _modify_values {
|
|
my ( $params ) = @_;
|
|
my $values = $params->{values};
|
|
my $regex = $params->{regex};
|
|
|
|
if ( $regex and $regex->{search} ) {
|
|
my $replace = $regex->{replace};
|
|
$replace =~ s/"/\\"/g; # Protection from embedded code
|
|
$replace = '"' . $replace . '"'; # Put in a string for /ee
|
|
$regex->{modifiers} //= q||;
|
|
my @available_modifiers = qw( i g );
|
|
my $modifiers = q||;
|
|
for my $modifier ( split //, $regex->{modifiers} ) {
|
|
$modifiers .= $modifier
|
|
if grep {/$modifier/} @available_modifiers;
|
|
}
|
|
foreach my $value ( @$values ) {
|
|
if ( $modifiers =~ m/^(ig|gi)$/ ) {
|
|
$value =~ s/$regex->{search}/$replace/igee;
|
|
}
|
|
elsif ( $modifiers eq 'i' ) {
|
|
$value =~ s/$regex->{search}/$replace/iee;
|
|
}
|
|
elsif ( $modifiers eq 'g' ) {
|
|
$value =~ s/$regex->{search}/$replace/gee;
|
|
}
|
|
else {
|
|
$value =~ s/$regex->{search}/$replace/ee;
|
|
}
|
|
}
|
|
}
|
|
return @$values;
|
|
}
|
|
1;
|
|
__END__
|