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Koha/C4/Heading/MARC21.pm
Ere Maijala b2b7d376d4 Bug 21826: Use subfield map in LinkBibHeadingsToAuthorities 
Use only allowable subfields when creating authorities from
bibliographic records.

Sponsored-by: National Library of Finland
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
2019-01-25 20:13:38 +00:00

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package C4::Heading::MARC21;
# Copyright (C) 2008 LibLime
#
# 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>.
use strict;
use warnings;
use MARC::Record;
use MARC::Field;
=head1 NAME
C4::Heading::MARC21
=head1 SYNOPSIS
use C4::Heading::MARC21;
=head1 DESCRIPTION
This is an internal helper class used by
C<C4::Heading> to parse headings data from
MARC21 records. Object of this type
do not carry data, instead, they only
dispatch functions.
=head1 DATA STRUCTURES
FIXME - this should be moved to a configuration file.
=head2 bib_heading_fields
=cut
my $bib_heading_fields = {
'100' => {
auth_type => 'PERSO_NAME',
subfields => 'abcdfghjklmnopqrst',
main_entry => 1
},
'110' => {
auth_type => 'CORPO_NAME',
subfields => 'abcdfghklmnoprst',
main_entry => 1
},
'111' => {
auth_type => 'MEETI_NAME',
subfields => 'acdfghjklnpqst',
main_entry => 1
},
'130' => {
auth_type => 'UNIF_TITLE',
subfields => 'adfghklmnoprst',
main_entry => 1
},
'440' => { auth_type => 'UNIF_TITLE', subfields => 'anp', series => 1 },
'600' => {
auth_type => 'PERSO_NAME',
subfields => 'abcdfghjklmnopqrstvxyz',
subject => 1
},
'610' => {
auth_type => 'CORPO_NAME',
subfields => 'abcdfghklmnoprstvxyz',
subject => 1
},
'611' => {
auth_type => 'MEETI_NAME',
subfields => 'acdfghjklnpqstvxyz',
subject => 1
},
'630' => {
auth_type => 'UNIF_TITLE',
subfields => 'adfghklmnoprstvxyz',
subject => 1
},
'648' => { auth_type => 'CHRON_TERM', subfields => 'avxyz', subject => 1 },
'650' => { auth_type => 'TOPIC_TERM', subfields => 'abvxyz', subject => 1 },
'651' => { auth_type => 'GEOGR_NAME', subfields => 'avxyz', subject => 1 },
'655' => { auth_type => 'GENRE/FORM', subfields => 'avxyz', subject => 1 },
'690' => { auth_type => 'TOPIC_TERM', subfields => 'abvxyz', subject => 1 },
'691' => { auth_type => 'GEOGR_NAME', subfields => 'avxyz', subject => 1 },
'696' => { auth_type => 'PERSO_NAME', subfields => 'abcdfghjklmnopqrst' },
'697' => { auth_type => 'CORPO_NAME', subfields => 'abcdfghklmnoprst' },
'698' => { auth_type => 'MEETI_NAME', subfields => 'acdfghjklnpqst' },
'699' => { auth_type => 'UNIF_TITLE', subfields => 'adfghklmnoprst' },
'700' => { auth_type => 'PERSO_NAME', subfields => 'abcdfghjklmnopqrst' },
'710' => { auth_type => 'CORPO_NAME', subfields => 'abcdfghklmnoprst' },
'711' => { auth_type => 'MEETI_NAME', subfields => 'acdfghjklnpqst' },
'730' => { auth_type => 'UNIF_TITLE', subfields => 'adfghklmnoprst' },
'800' => {
auth_type => 'PERSO_NAME',
subfields => 'abcdfghjklmnopqrst',
series => 1
},
'810' => {
auth_type => 'CORPO_NAME',
subfields => 'abcdfghklmnoprst',
series => 1
},
'811' =>
{ auth_type => 'MEETI_NAME', subfields => 'acdfghjklnpqst', series => 1 },
'830' =>
{ auth_type => 'UNIF_TITLE', subfields => 'adfghklmnoprst', series => 1 },
};
=head2 subdivisions
=cut
my %subdivisions = (
'v' => 'formsubdiv',
'x' => 'generalsubdiv',
'y' => 'chronologicalsubdiv',
'z' => 'geographicsubdiv',
);
=head1 METHODS
=head2 new
my $marc_handler = C4::Heading::MARC21->new();
=cut
sub new {
my $class = shift;
return bless {}, $class;
}
=head2 valid_bib_heading_tag
=cut
sub valid_bib_heading_tag {
my $self = shift;
my $tag = shift;
my $frameworkcode = shift;
if ( exists $bib_heading_fields->{$tag} ) {
return 1;
}
else {
return 0;
}
}
=head2 valid_bib_heading_subfield
=cut
sub valid_bib_heading_subfield {
my $self = shift;
my $tag = shift;
my $subfield = shift;
if ( exists $bib_heading_fields->{$tag} ) {
return 1 if ($bib_heading_fields->{$tag}->{subfields} =~ /$subfield/);
}
return 0;
}
=head2 parse_heading
=cut
sub parse_heading {
my $self = shift;
my $field = shift;
my $tag = $field->tag;
my $field_info = $bib_heading_fields->{$tag};
my $auth_type = $field_info->{'auth_type'};
my $thesaurus =
$tag =~ m/6../
? _get_subject_thesaurus($field)
: "lcsh"; # use 'lcsh' for names, UT, etc.
my $search_heading =
_get_search_heading( $field, $field_info->{'subfields'} );
my $display_heading =
_get_display_heading( $field, $field_info->{'subfields'} );
return ( $auth_type, $thesaurus, $search_heading, $display_heading,
'exact' );
}
=head1 INTERNAL FUNCTIONS
=head2 _get_subject_thesaurus
=cut
sub _get_subject_thesaurus {
my $field = shift;
my $ind2 = $field->indicator(2);
my $thesaurus = "notdefined";
if ( $ind2 eq '0' ) {
$thesaurus = "lcsh";
}
elsif ( $ind2 eq '1' ) {
$thesaurus = "lcac";
}
elsif ( $ind2 eq '2' ) {
$thesaurus = "mesh";
}
elsif ( $ind2 eq '3' ) {
$thesaurus = "nal";
}
elsif ( $ind2 eq '4' ) {
$thesaurus = "notspecified";
}
elsif ( $ind2 eq '5' ) {
$thesaurus = "cash";
}
elsif ( $ind2 eq '6' ) {
$thesaurus = "rvm";
}
elsif ( $ind2 eq '7' ) {
my $sf2 = $field->subfield('2');
$thesaurus = $sf2 if defined($sf2);
}
return $thesaurus;
}
=head2 _get_search_heading
=cut
sub _get_search_heading {
my $field = shift;
my $subfields = shift;
my $heading = "";
my @subfields = $field->subfields();
my $first = 1;
for ( my $i = 0 ; $i <= $#subfields ; $i++ ) {
my $code = $subfields[$i]->[0];
my $code_re = quotemeta $code;
my $value = $subfields[$i]->[1];
$value =~ s/[-,.:=;!%\/]$//;
next unless $subfields =~ qr/$code_re/;
if ($first) {
$first = 0;
$heading = $value;
}
else {
if ( exists $subdivisions{$code} ) {
$heading .= " $subdivisions{$code} $value";
}
else {
$heading .= " $value";
}
}
}
# remove characters that are part of CCL syntax
$heading =~ s/[)(=]//g;
return $heading;
}
=head2 _get_display_heading
=cut
sub _get_display_heading {
my $field = shift;
my $subfields = shift;
my $heading = "";
my @subfields = $field->subfields();
my $first = 1;
for ( my $i = 0 ; $i <= $#subfields ; $i++ ) {
my $code = $subfields[$i]->[0];
my $code_re = quotemeta $code;
my $value = $subfields[$i]->[1];
next unless $subfields =~ qr/$code_re/;
if ($first) {
$first = 0;
$heading = $value;
}
else {
if ( exists $subdivisions{$code} ) {
$heading .= "--$value";
}
else {
$heading .= " $value";
}
}
}
return $heading;
}
# Additional limiters that we aren't using:
# if ($self->{'subject_added_entry'}) {
# $limiters .= " AND Heading-use-subject-added-entry=a";
# }
# if ($self->{'series_added_entry'}) {
# $limiters .= " AND Heading-use-series-added-entry=a";
# }
# if (not $self->{'subject_added_entry'} and not $self->{'series_added_entry'}) {
# $limiters .= " AND Heading-use-main-or-added-entry=a"
# }
=head1 AUTHOR
Koha Development Team <http://koha-community.org/>
Galen Charlton <galen.charlton@liblime.com>
=cut
1;
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