100 lines
2.4 KiB
Perl
100 lines
2.4 KiB
Perl
package Koha::SuggestionEngine::Plugin::ExplodedTerms;
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# Copyright 2012 C & P Bibliography Services
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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::SuggestionEngine::Plugin::ExplodedTerms - suggest searches for broader/narrower/related subjects
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=head1 SYNOPSIS
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=head1 DESCRIPTION
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Plugin to suggest expanding the search by adding broader/narrower/related
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subjects to subject searches.
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=cut
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use Modern::Perl;
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use base qw(Koha::SuggestionEngine::Base);
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use Koha::I18N qw(__);
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=head2 NAME
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my $name = $plugin->NAME;
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=cut
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sub NAME {
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return 'ExplodedTerms';
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}
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=head2 VERSION
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my $version = $plugin->VERSION;
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=cut
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sub VERSION {
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return '1.0';
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}
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=head2 get_suggestions
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my $suggestions = $plugin->get_suggestions(\%param);
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Return suggestions for the specified search that add broader/narrower/related
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terms to the search.
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=cut
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sub get_suggestions {
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my ( $self, $param ) = @_;
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my $search = $param->{'search'};
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return if ( $search =~ m/^(ccl=|cql=|pqf=)/ );
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$search =~ s/(su|su-br|su-na|su-rl)[:=](\w*)/OP!$2/g;
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return if ( $search =~ m/\w+[:=]\w+/ );
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my $indexes_to_label = {
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'su-na' => __('Search also for narrower subjects'),
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'su-br' => __('Search also for broader subjects'),
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'su-rl' => __('Search also for related subjects'),
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};
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my @results;
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foreach my $index ( keys %{$indexes_to_label} ) {
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my $thissearch = $search;
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$thissearch = "$index:$thissearch"
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unless ( $thissearch =~ s/OP!/$index:/g );
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push @results, {
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'search' => $thissearch,
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relevance => 100,
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# FIXME: it'd be nice to have some empirical measure of
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# "relevance" in this case, but we don't.
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label => $indexes_to_label->{$index}
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};
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}
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return \@results;
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}
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1;
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