342 lines
9.4 KiB
Perl
342 lines
9.4 KiB
Perl
package Koha::SimpleMARC;
|
|
|
|
# Copyright 2009 Kyle M. Hall <kyle.m.hall@gmail.com>
|
|
|
|
use Modern::Perl;
|
|
|
|
#use MARC::Record;
|
|
|
|
require Exporter;
|
|
|
|
our @ISA = qw(Exporter);
|
|
our %EXPORT_TAGS = ( 'all' => [ qw(
|
|
|
|
) ] );
|
|
|
|
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );
|
|
|
|
our @EXPORT = qw(
|
|
read_field
|
|
update_field
|
|
copy_field
|
|
move_field
|
|
delete_field
|
|
field_exists
|
|
field_equals
|
|
);
|
|
|
|
our $VERSION = '0.01';
|
|
|
|
our $debug = 0;
|
|
|
|
=head1 NAME
|
|
|
|
SimpleMARC - Perl module for making simple MARC record alterations.
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
use SimpleMARC;
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
SimpleMARC is designed to make writing scripts
|
|
to modify MARC records simple and easy.
|
|
|
|
Every function in the modules requires a
|
|
MARC::Record object as its first parameter.
|
|
|
|
=head1 AUTHOR
|
|
|
|
Kyle Hall <lt>kyle.m.hall@gmail.com<gt>
|
|
|
|
=head1 COPYRIGHT AND LICENSE
|
|
|
|
Copyright (C) 2009 by Kyle Hall
|
|
|
|
This library is free software; you can redistribute it and/or modify
|
|
it under the same terms as Perl itself, either Perl version 5.8.7 or,
|
|
at your option, any later version of Perl 5 you may have available.
|
|
|
|
=head1 FUNCTIONS
|
|
|
|
=head2 copy_field
|
|
|
|
copy_field( $record, $fromFieldName, $fromSubfieldName, $toFieldName, $toSubfieldName[, $regex[, $n ] ] );
|
|
|
|
Copies a value from one field to another. If a regular expression ( $regex ) is supplied,
|
|
the value will be transformed by the given regex before being copied into the new field.
|
|
Example: $regex = { search => 'Old Text', replace => 'Replacement Text', modifiers => 'g' };
|
|
|
|
If $n is passed, copy_field will only copy the Nth field of the list of fields.
|
|
E.g. $n = 1 will only use the first field's value, $n = 2 will use only the 2nd field's value.
|
|
|
|
=cut
|
|
|
|
sub copy_field {
|
|
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 $n = $params->{n};
|
|
my $dont_erase = $params->{dont_erase};
|
|
|
|
if ( ! ( $record && $fromFieldName && $toFieldName ) ) { return; }
|
|
|
|
my @values = read_field({ record => $record, field => $fromFieldName, subfield => $fromSubfieldName });
|
|
@values = ( $values[$n-1] ) if ( $n );
|
|
|
|
if ( $regex and $regex->{search} ) {
|
|
$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}/$regex->{replace}/ig;
|
|
}
|
|
elsif ( $modifiers eq 'i' ) {
|
|
$value =~ s/$regex->{search}/$regex->{replace}/i;
|
|
}
|
|
elsif ( $modifiers eq 'g' ) {
|
|
$value =~ s/$regex->{search}/$regex->{replace}/g;
|
|
}
|
|
else {
|
|
$value =~ s/$regex->{search}/$regex->{replace}/;
|
|
}
|
|
}
|
|
}
|
|
update_field({ record => $record, field => $toFieldName, subfield => $toSubfieldName, dont_erase => $dont_erase, values => \@values });
|
|
}
|
|
|
|
=head2 update_field
|
|
|
|
update_field( $record, $fieldName, $subfieldName, $dont_erase, $value[, $value,[ $value ... ] ] );
|
|
|
|
Updates a field with the given value, creating it if neccessary.
|
|
|
|
If multiple values are supplied, they will be used to update a list of repeatable fields
|
|
until either the fields or the values are all used.
|
|
|
|
If a single value is supplied for a repeated field, that value will be used to update
|
|
each of the repeated fields.
|
|
|
|
=cut
|
|
|
|
sub update_field {
|
|
my ( $params ) = @_;
|
|
my $record = $params->{record};
|
|
my $fieldName = $params->{field};
|
|
my $subfieldName = $params->{subfield};
|
|
my $dont_erase = $params->{dont_erase};
|
|
my @values = @{ $params->{values} };
|
|
|
|
if ( ! ( $record && $fieldName ) ) { return; }
|
|
|
|
my $i = 0;
|
|
my $field;
|
|
if ( $subfieldName ) {
|
|
if ( my @fields = $record->field( $fieldName ) ) {
|
|
unless ( $dont_erase ) {
|
|
@values = ($values[0]) x scalar( @fields )
|
|
if @values == 1;
|
|
foreach my $field ( @fields ) {
|
|
$field->update( "$subfieldName" => $values[$i++] );
|
|
}
|
|
}
|
|
if ( $i <= scalar ( @values ) - 1 ) {
|
|
foreach my $field ( @fields ) {
|
|
foreach my $j ( $i .. scalar( @values ) - 1) {
|
|
$field->add_subfields( "$subfieldName" => $values[$j] );
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
## Field does not exist, create it.
|
|
foreach my $value ( @values ) {
|
|
$field = MARC::Field->new( $fieldName, '', '', "$subfieldName" => $values[$i++] );
|
|
$record->append_fields( $field );
|
|
}
|
|
}
|
|
} else { ## No subfield
|
|
if ( my @fields = $record->field( $fieldName ) ) {
|
|
@values = ($values[0]) x scalar( @fields )
|
|
if @values == 1;
|
|
foreach my $field ( @fields ) {
|
|
$field->update( $values[$i++] );
|
|
}
|
|
} else {
|
|
## Field does not exists, create it
|
|
foreach my $value ( @values ) {
|
|
$field = MARC::Field->new( $fieldName, $value );
|
|
$record->append_fields( $field );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
=head2 read_field
|
|
|
|
my @values = read_field( $record, $fieldName[, $subfieldName, [, $n ] ] );
|
|
|
|
Returns an array of field values for the given field and subfield
|
|
|
|
If $n is given, it will return only the $nth value of the array.
|
|
E.g. If $n = 1, it return the 1st value, if $n = 3, it will return the 3rd value.
|
|
|
|
=cut
|
|
|
|
sub read_field {
|
|
my ( $params ) = @_;
|
|
my $record = $params->{record};
|
|
my $fieldName = $params->{field};
|
|
my $subfieldName = $params->{subfield};
|
|
my $n = $params->{n};
|
|
|
|
my @fields = $record->field( $fieldName );
|
|
|
|
return map { $_->data() } @fields unless $subfieldName;
|
|
|
|
my @subfields;
|
|
foreach my $field ( @fields ) {
|
|
my @sf = $field->subfield( $subfieldName );
|
|
push( @subfields, @sf );
|
|
}
|
|
|
|
if ( $n ) {
|
|
return $subfields[$n-1];
|
|
} else {
|
|
return @subfields;
|
|
}
|
|
}
|
|
|
|
=head2 field_exists
|
|
|
|
$bool = field_exists( $record, $fieldName[, $subfieldName ]);
|
|
|
|
Returns true if the field exits, false otherwise.
|
|
|
|
=cut
|
|
|
|
sub field_exists {
|
|
my ( $params ) = @_;
|
|
my $record = $params->{record};
|
|
my $fieldName = $params->{field};
|
|
my $subfieldName = $params->{subfield};
|
|
|
|
if ( ! $record ) { return; }
|
|
|
|
my $return = 0;
|
|
if ( $fieldName && $subfieldName ) {
|
|
$return = $record->field( $fieldName ) && $record->subfield( $fieldName, $subfieldName );
|
|
} elsif ( $fieldName ) {
|
|
$return = $record->field( $fieldName ) && 1;
|
|
}
|
|
|
|
return $return;
|
|
}
|
|
|
|
=head2 field_equals
|
|
|
|
$bool = field_equals( $record, $value, $fieldName[, $subfieldName[, $regex [, $n ] ] ]);
|
|
|
|
Returns true if the field equals the given value, false otherwise.
|
|
|
|
If a regular expression ( $regex ) is supplied, the value will be compared using
|
|
the given regex. Example: $regex = 'sought_text'
|
|
|
|
If $n is passed, the Nth field of a repeatable series will be used for comparison.
|
|
Set $n to 1 or leave empty for a non-repeatable field.
|
|
|
|
=cut
|
|
|
|
sub field_equals {
|
|
my ( $params ) = @_;
|
|
my $record = $params->{record};
|
|
my $value = $params->{value};
|
|
my $fieldName = $params->{field};
|
|
my $subfieldName = $params->{subfield};
|
|
my $regex = $params->{regex};
|
|
my $n = $params->{n};
|
|
$n = 1 unless ( $n ); ## $n defaults to first field of a repeatable field series
|
|
|
|
if ( ! $record ) { return; }
|
|
|
|
my @field_values = read_field({ record => $record, field => $fieldName, subfield => $subfieldName, n => $n });
|
|
my $field_value = $field_values[$n-1];
|
|
|
|
if ( $regex ) {
|
|
return $field_value =~ m/$value/;
|
|
} else {
|
|
return $field_value eq $value;
|
|
}
|
|
}
|
|
|
|
=head2 move_field
|
|
|
|
move_field( $record, $fromFieldName, $fromSubfieldName, $toFieldName, $toSubfieldName[, $regex [, $n ] ] );
|
|
|
|
Moves a value from one field to another. If a regular expression ( $regex ) is supplied,
|
|
the value will be transformed by the given regex before being moved into the new field.
|
|
Example: $regex = 's/Old Text/Replacement Text/'
|
|
|
|
If $n is passed, only the Nth field will be moved. $n = 1
|
|
will move the first repeatable field, $n = 3 will move the third.
|
|
|
|
=cut
|
|
|
|
sub move_field {
|
|
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 $n = $params->{n};
|
|
|
|
copy_field({ record => $record, from_field => $fromFieldName, from_subfield => $fromSubfieldName, to_field => $toFieldName, to_subfield => $toSubfieldName, regex => $regex, n => $n , dont_erase => 1 });
|
|
delete_field({ record => $record, field => $fromFieldName, subfield => $fromSubfieldName, n => $n });
|
|
}
|
|
|
|
=head2 delete_field
|
|
|
|
delete_field( $record, $fieldName[, $subfieldName [, $n ] ] );
|
|
|
|
Deletes the given field.
|
|
|
|
If $n is passed, only the Nth field will be deleted. $n = 1
|
|
will delete the first repeatable field, $n = 3 will delete the third.
|
|
|
|
=cut
|
|
|
|
sub delete_field {
|
|
my ( $params ) = @_;
|
|
my $record = $params->{record};
|
|
my $fieldName = $params->{field};
|
|
my $subfieldName = $params->{subfield};
|
|
my $n = $params->{n};
|
|
|
|
my @fields = $record->field( $fieldName );
|
|
|
|
@fields = ( $fields[$n-1] ) if ( $n );
|
|
|
|
if ( @fields && !$subfieldName ) {
|
|
foreach my $field ( @fields ) {
|
|
$record->delete_field( $field );
|
|
}
|
|
} elsif ( @fields && $subfieldName ) {
|
|
foreach my $field ( @fields ) {
|
|
$field->delete_subfield( code => $subfieldName );
|
|
}
|
|
}
|
|
}
|
|
|
|
1;
|
|
__END__
|