106 lines
2.7 KiB
Perl
106 lines
2.7 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 under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 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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=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 strict;
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use warnings;
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use Carp;
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use C4::Templates qw(gettemplate); # This is necessary for translatability
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use base qw(Koha::SuggestionEngine::Base);
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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 = shift;
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my $param = shift;
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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 = (
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'su-na',
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'su-br',
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'su-rl'
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);
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my $cgi = new CGI;
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my $template = C4::Templates::gettemplate('text/explodedterms.tt', 'opac', $cgi);
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my @results;
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foreach my $index (@indexes) {
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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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$template->{VARS}->{index} = $index;
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my $label = pack("U0a*", $template->output); #FIXME: C4::Templates is
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# returning incorrectly-marked UTF-8. This fixes the problem, but is
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# an annoying workaround.
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push @results,
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{
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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 => $label
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};
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} return \@results;
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}
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1;
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