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package Koha::Filter::MARC::Punctuation; |
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# Copyright 2024 join2 |
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# |
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# This file is part of Koha. |
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# |
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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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=head1 NAME |
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Koha::Filter::MARC::Punctuation - Automatically add punctuation to |
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Marc records if the leader specifies they were catalogued without it. |
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Documentation for proper punctuation: |
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https://www.loc.gov/aba/pcc/documents/isbdmarc2016.pdf |
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=head1 DESCRIPTION |
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If the Marc leader 18 specifies, that the record was catalogued |
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without punctuation add the proper punctuation chars to the individual |
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fields before passing the record on to fruther processing. Once this |
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filter is applied it should be safe for further steps to assume that |
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the record holds Marc punctuation. (The records in the database are |
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_not_ changed.) |
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Trigger to add punctuation: leader 18 is either `n` or `c`. |
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Currently handled fields: |
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- 260 |
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=cut |
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use strict; |
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use warnings; |
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use base qw(Koha::RecordProcessor::Base); |
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our $NAME = 'Punctuation'; |
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=head2 _decorate_260 |
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Add punctuation to MARC field 260. The function assumes that it is only |
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called if no punctuation is part of the record. |
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=cut |
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sub _decorate_260 { |
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my ($field) = @_; |
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# simple chars _preceeding_ a subfield |
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my %pchrs = ( |
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# 'a' => ' ; ', # only for multiple $a |
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'b' => ' : ', |
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'c' => ', ', |
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# 'f' => ' : ', |
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# 'g' => ', ', |
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'r' => ' = ', |
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't' => ' = ', |
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); |
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# simple chars _appended_ to a subfield |
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my %achars = ( |
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'3' => ': ', |
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); |
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my $lastsf = ''; |
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my @new_subfields = (); |
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foreach my $subfield ( $field->subfields() ) { |
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my ( $sf, $value ) = @$subfield; |
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if ( ( $sf eq 'a' ) and ( $lastsf eq 'a' ) ) { |
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$value = "; $value"; |
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} |
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if ( ( $sf eq 'a' ) and ( $lastsf eq 'b' ) ) { |
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$value = " ; $value"; |
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} |
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# for $e: assume that we always have either $f or $g |
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if ( $sf eq 'e' ) { |
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$value = " ($value "; |
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} |
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if ( $sf eq 'f' ) { |
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if ( $lastsf eq 'e' ) { |
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$value = " : $value"; |
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} else { |
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$value = " ($value"; |
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} |
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} |
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if ( $sf eq 'g' ) { |
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if ( $lastsf ne 'f' ) { |
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$value = ", ($value)"; |
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} else { |
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$value = ", $value)"; |
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} |
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} |
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$lastsf = $sf; |
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if ( $sf eq 'q' ) { |
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$value = "($value)"; |
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} |
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if ( exists $pchrs{$sf} ) { |
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$value = $pchrs{$sf} . $value; |
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} |
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# FIXME something seems wrong here, however $3 is |
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# not used by Koha |
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# if ( exists $achrs{$sf} ) { |
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# $value = $value . $achrs{$sf}; |
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# } |
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push( @new_subfields, $sf, $value ); |
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} |
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return @new_subfields; |
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} |
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=head2 filter |
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my $newrecord = $filter->filter($record); |
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Return title fields with proper punctuation either as the record held |
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them already or as they were added. |
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Note: subfields in 260 are used to construct search links in OPAC. The |
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following will include the description chars in the search links as |
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does direct cataloguing of the punctuation. Kohas search engine seems |
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to handle this gracefully and still returns proper results. |
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=cut |
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sub filter { |
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my ( $self, $record ) = @_; |
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return |
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unless $record and ref($record) eq 'MARC::Record'; |
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my $leader = $record->leader(); |
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my $punctuation_omitted = |
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( ( substr( $leader, 18, 1 ) eq 'c' ) or ( substr( $leader, 18, 1 ) eq 'n' ) ); |
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my @new_subfields = (); |
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if ($punctuation_omitted) { |
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foreach my $field ( $record->fields() ) { |
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@new_subfields = (); |
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# Process the implemented filters |
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if ( $field->tag() eq '260' ) { |
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@new_subfields = _decorate_260($field); |
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} |
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# If filtered, replace the field content |
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if (@new_subfields) { |
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$field->replace_with( |
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MARC::Field->new( |
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$field->tag(), |
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$field->indicator(1), |
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$field->indicator(2), |
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@new_subfields |
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) |
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); |
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} |
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} |
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} |
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return $record; |
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} |
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1; |