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127 lines
3.7 KiB
127 lines
3.7 KiB
#!/usr/bin/perl
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# Copyright The National Library of Finland 2018
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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 under thes
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 3 of the License, or (at your option) any later
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# version.
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#
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# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the 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 along
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# with Koha; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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use Modern::Perl;
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=head1 NAME
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Koha::Z3950Responder::RPN
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=head1 SYNOPSIS
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Overrides for the C<Net::Z3950::RPN> classes adding a C<to_koha> method that
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converts the query to a syntax that C<Koha::SearchEngine> understands.
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=head1 DESCRIPTION
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The method used here is described in C<samples/render-search.pl> of
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C<Net::Z3950::SimpleServer>.
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=cut
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package Net::Z3950::RPN::Term;
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sub to_koha {
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my ($self, $mappings) = @_;
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my $attrs = $self->{'attributes'};
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my $fields = $mappings->{use}{default};
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my $split = 0;
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my $prefix = '';
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my $suffix = '';
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my $term = $self->{'term'};
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utf8::decode($term);
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if ($attrs) {
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foreach my $attr (@$attrs) {
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if ($attr->{'attributeType'} == 1) { # use
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my $use = $attr->{'attributeValue'};
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$fields = $mappings->{use}{$use} if defined $mappings->{use}{$use};
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} elsif ($attr->{'attributeType'} == 4) { # structure
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$split = 1 if ($attr->{'attributeValue'} == 2);
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} elsif ($attr->{'attributeType'} == 5) { # truncation
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my $truncation = $attr->{'attributeValue'};
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$prefix = '*' if ($truncation == 2 || $truncation == 3);
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$suffix = '*' if ($truncation == 1 || $truncation == 3);
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}
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}
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}
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$fields = [$fields] unless !defined $fields || ref($fields) eq 'ARRAY';
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if ($split) {
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my @terms;
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foreach my $word (split(/\s/, $term)) {
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$word =~ s/^[\,\.;:\\\/\"\'\-\=]+//g;
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$word =~ s/[\,\.;:\\\/\"\'\-\=]+$//g;
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next if (!$word);
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$word = $self->escape($word);
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my @words;
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if( $fields ) {
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foreach my $field (@{$fields}) {
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push(@words, "$field:($prefix$word$suffix)");
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}
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} else {
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push(@words, "($prefix$word$suffix)");
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}
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push (@terms, join(' OR ', @words));
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}
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return '(' . join(' AND ', @terms) . ')';
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}
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my @terms;
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$term = $self->escape($term);
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return "($prefix$term$suffix)" unless $fields;
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foreach my $field (@{$fields}) {
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push(@terms, "$field:($prefix$term$suffix)");
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}
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return '(' . join(' OR ', @terms) . ')';
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}
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sub escape {
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my ($self, $term) = @_;
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$term =~ s/([()])/\\$1/g;
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return $term;
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}
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package Net::Z3950::RPN::And;
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sub to_koha {
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my ($self, $mappings) = @_;
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return '(' . $self->[0]->to_koha($mappings) . ' AND ' .
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$self->[1]->to_koha($mappings) . ')';
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}
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package Net::Z3950::RPN::Or;
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sub to_koha {
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my ($self, $mappings) = @_;
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return '(' . $self->[0]->to_koha($mappings) . ' OR ' .
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$self->[1]->to_koha($mappings) . ')';
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}
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package Net::Z3950::RPN::AndNot;
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sub to_koha {
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my ($self, $mappings) = @_;
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return '(' . $self->[0]->to_koha($mappings) . ' NOT ' .
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$self->[1]->to_koha($mappings) . ')';
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}
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1;
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