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package Grep::Search; |
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|
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use strict; |
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use warnings; |
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use base qw( Class::Accessor ); |
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Grep::Search->mk_accessors( qw( analyzer store writer create index_path ) ); |
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|
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use Data::Dump qw/dump/; |
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use Lucene; |
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use Jifty::Util; |
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|
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my $debug = 0; |
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|
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=head1 NAME |
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|
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Grep::Search - full text search |
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|
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=head1 METHODS |
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|
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=head2 new |
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|
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my $search = Grep::Search->new(); |
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|
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=cut |
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|
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sub log { Jifty->web->log } |
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|
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sub new { |
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my $class = shift; |
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my $self = $class->SUPER::new(@_); |
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|
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my $index_path = Jifty::Util->app_root . '/var/lucene'; |
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|
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$self->index_path( $index_path ); |
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|
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if (! -e "$index_path/segments") { |
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$self->create( 1 ); |
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$self->log->debug("Creating new index $index_path"); |
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} else { |
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$self->create( 0 ); |
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$self->log->debug("Opening index: $index_path"); |
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} |
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|
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$self->analyzer( new Lucene::Analysis::Standard::StandardAnalyzer() ); |
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$self->log->debug($self->analyzer . " created"); |
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|
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$self->store( Lucene::Store::FSDirectory->getDirectory( $index_path, $self->create ) ); |
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$self->log->debug($self->store, " created"); |
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|
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return $self; |
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} |
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|
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=head2 add |
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|
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$search->add( $record, $owner_id ); |
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|
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=cut |
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|
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sub add { |
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my $self = shift; |
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|
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my $i = shift or die "no record to add"; |
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my $uid = shift; |
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|
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die "record not Jifty::Record but ", ref $i unless ($i->isa('Jifty::Record')); |
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|
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my $pk = { $i->primary_keys }; |
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|
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my $doc = new Lucene::Document; |
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|
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my @columns = map { $_->name } $i->columns; |
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|
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foreach my $c ( @columns ) { |
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|
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my $v = $i->$c; |
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|
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if ( ref($v) ne '' ) { |
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|
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foreach my $f_c ( qw/id name title/ ) { |
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if ( $i->$c->can( $f_c ) ) { |
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my $f_v = $i->$c->$f_c || $i->$c->{values}->{ $f_c }; |
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my $col = $c . '_' . $f_c; |
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if ( $f_v ) { |
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warn " # $col = $f_v\n" if ($debug); |
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$doc->add(Lucene::Document::Field->Text( $col, $f_v )); |
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} else { |
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warn " . $col is NULL\n" if ($debug); |
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} |
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} |
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} |
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|
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if ($v->isa('Jifty::DateTime')) { |
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warn " d $c = $v\n" if ($debug); |
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$doc->add(Lucene::Document::Field->Keyword( $c, "$v" )); |
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} else { |
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warn " s $c = $v [",ref($v),"]\n" if ($debug); |
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} |
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next; |
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} |
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|
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next if (! defined($v) || $v eq ''); |
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|
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$v =~ s/<[^>]+>/ /gs; |
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|
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if ( defined( $pk->{$c} ) ) { |
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$doc->add(Lucene::Document::Field->Keyword( $c, $v )); |
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warn " * $c = $v\n" if ($debug); |
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} else { |
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$doc->add(Lucene::Document::Field->Text( $c, $v )); |
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warn " + $c = ", $self->snippet( 50, $v ), "\n" if ($debug); |
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} |
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} |
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|
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# add _owner_id to speed up filtering of search results |
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$uid ||= Jifty->web->current_user->id; |
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$doc->add(Lucene::Document::Field->Keyword( '_owner_id', $uid )); |
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|
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if (! defined( $self->writer )) { |
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$self->writer( new Lucene::Index::IndexWriter( $self->store, $self->analyzer, $self->create ) ); |
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$self->log->debug($self->writer, " created"); |
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} |
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$self->writer->addDocument($doc); |
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|
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$self->log->debug("added ", $i->id, " for user $uid to index"); |
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} |
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=head2 collection |
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|
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my $ItemCollection = $search->collection( 'search query' ); |
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|
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=cut |
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|
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sub collection { |
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my $self = shift; |
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|
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my $q = shift or die "no q?"; |
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|
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return if ( $self->create ); |
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|
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my $searcher = new Lucene::Search::IndexSearcher($self->store); |
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$self->log->debug("$searcher created"); |
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my $parser = new Lucene::QueryParser("content", $self->analyzer); |
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$self->log->debug("$parser created"); |
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|
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my $full_q = "($q) AND _owner_id:" . Jifty->web->current_user->id; |
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|
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my $query = $parser->parse( $full_q ); |
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|
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$self->log->debug("searching for '$q' using ", $query->toString); |
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|
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my $hits = $searcher->search($query); |
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my $num_hits = $hits->length(); |
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$self->log->debug("found $num_hits results"); |
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|
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my $collection = Grep::Model::ItemCollection->new(); |
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|
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my @results; |
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for ( my $i = 0; $i < $num_hits; $i++ ) { |
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my $doc = $hits->doc( $i ); |
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my $score = $hits->score($i); |
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my $title = $doc->get("title"); |
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my $id = $doc->get("id"); |
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|
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$self->log->debug("result $i $score $title"); |
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|
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my $item = Grep::Model::Item->new(); |
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my ($ok,$msg) = $item->load_by_cols( id => $id ); |
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|
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if ( $ok ) { |
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$collection->add_record( $item ); |
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} else { |
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warn "can't load item $id\n"; |
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} |
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|
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} |
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|
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undef $hits; |
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undef $query; |
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undef $parser; |
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$searcher->close; |
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undef $searcher; |
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|
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return $collection; |
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} |
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|
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=head2 finish |
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|
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$search->finish |
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|
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=cut |
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|
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sub finish { |
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my $self = shift; |
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if ($self->writer) { |
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$self->log->debug("closing index"); |
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$self->writer->close; |
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} |
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$self->log->debug("finish"); |
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|
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undef $self; |
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|
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return; |
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} |
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|
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=for TODO |
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|
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sub _signal { |
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my $s = shift; |
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warn "catched SIG $s\n"; |
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finish(); |
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exit(0); |
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} |
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|
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$SIG{'__DIE__'} = \&_signal; |
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$SIG{'INT'} = \&_signal; |
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$SIG{'QUIT'} = \&_signal; |
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|
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=cut |
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|
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=head2 snippet |
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|
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my $short = $self->snippet( 50, $text ); |
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|
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=cut |
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|
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sub snippet { |
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my $self = shift; |
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|
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my $len = shift or die "no len?"; |
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my $m = join(" ", @_); |
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$m =~ s/\s+/ /gs; |
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if (length($m) > $len) { |
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return substr($m,0,$len) . '...'; |
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} else { |
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return $m; |
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} |
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} |
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|
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