lib/Grep/Search.pm

package Grep::Search;

use strict;
use warnings;

use Data::Dump qw/dump/;
use Lucene;
use Jifty::Util;

my $index_path = Jifty::Util->app_root . '/var/lucene';

my ( $analyzer, $store, $writer );

my $debug = 1;
my $create;

sub create {

        if (defined( $create )) {
                Jifty->log->debug("using previous create $create");
                return $create;
        }

        if (! -e "$index_path/segments") {
                $create = 1;
                Jifty->log->debug("create index $index_path");
        } else {
                $create = 0;
                Jifty->log->debug("open index: $index_path");
        }
        return $create;
}

sub analyzer {
        my $self = shift;
        $analyzer ||= new Lucene::Analysis::Standard::StandardAnalyzer();
        return $analyzer;
}

sub store {
        my $self = shift;

        $store ||= Lucene::Store::FSDirectory->getDirectory( $index_path, $self->create );
        return $store;
}

sub writer {
        my $self = shift;
        $writer ||= new Lucene::Index::IndexWriter( $self->store, $self->analyzer, $self->create );
        return $writer;
}

=head2 add

  Grep::Search->add( $record, $owner_id );

=cut

sub add {
        my $self = shift;

        my $i = shift or die "no record to add";
        my $uid = shift;

        die "record not Jifty::Record but ", ref $i unless ($i->isa('Jifty::Record'));

        my $pk = { $i->primary_keys };

        my $doc = new Lucene::Document;

        my @columns = map { $_->name } $i->columns;

        foreach my $c ( @columns ) {

                my $v = $i->$c;

                if ( ref($v) ne '' ) {

                        foreach my $f_c ( qw/id name title/ ) {
                                if ( $i->$c->can( $f_c ) ) {
                                        my $f_v = $i->$c->$f_c || $i->$c->{values}->{ $f_c };
                                        my $col = $c . '_' . $f_c;
                                        if ( $f_v ) {
                                                warn "  # $col = $f_v\n" if ($debug);
                                                $doc->add(Lucene::Document::Field->Text( $col, $f_v ));
                                        } else {
                                                warn "  . $col is NULL\n" if ($debug);
                                        }
                                }
                        }

                        if ($v->isa('Jifty::DateTime')) {
                                warn "  d $c = $v\n" if ($debug);
                                $doc->add(Lucene::Document::Field->Keyword( $c, "$v" ));
                        } else {
                                warn "  s $c = $v [",ref($v),"]\n" if ($debug);
                        }
                        next;
                }

                next if (! defined($v) || $v eq '');

                $v =~ s/<[^>]+>/ /gs;

                if ( defined( $pk->{$c} ) ) {
                        $doc->add(Lucene::Document::Field->Keyword( $c, $v ));
                        warn "  * $c = $v\n" if ($debug);
                } else {
                        $doc->add(Lucene::Document::Field->Text( $c, $v ));
                        warn "  + $c = ", $self->snippet( 50, $v ), "\n" if ($debug);
                }
        }

        # add _owner_id to speed up filtering of search results
        $uid ||= Jifty->web->current_user->id;
        $doc->add(Lucene::Document::Field->Keyword( '_owner_id', $uid ));

        $self->writer->addDocument($doc);

        Jifty->log->debug("added ", $i->id, " for user $uid to index");
}

=head2

  my $ItemCollection = Grep::Search->collection( 'search query' );

=cut

sub collection {
        my $self = shift;

        my $q = shift or die "no q?";

        return if ( $self->create );

        my $searcher = new Lucene::Search::IndexSearcher($self->store);
        my $parser = new Lucene::QueryParser("content", $self->analyzer);

        my $full_q = "($q) AND _owner_id:" . Jifty->web->current_user->id;

        my $query = $parser->parse( $full_q );

        Jifty->log->debug("searching for '$q' using ", $query->toString);

        my $hits = $searcher->search($query);
        my $num_hits = $hits->length();

        Jifty->log->debug("found $num_hits results");

        my $collection = Grep::Model::ItemCollection->new();

        my @results;

        for ( my $i = 0; $i < $num_hits; $i++ ) {

                my $doc = $hits->doc( $i );

                my $score = $hits->score($i);
                my $title = $doc->get("title");
                my $id = $doc->get("id");

                warn "## $i $score $title\n";

                my $item = Grep::Model::Item->new();
                my ($ok,$msg) = $item->load_by_cols( id => $id );

                if ( $ok ) {
                        $collection->add_record( $item );
                } else {
                        warn "can't load item $id\n";
                }

        }

        undef $hits;
        undef $query;
        undef $parser;
        undef $searcher;

        return $collection;
}

=head2 finish

  Grep::Search->finish

=cut

sub finish {
        my $self = shift;
        if ($writer) {
                warn "closing index\n";
                $writer->close;
        }
        undef $writer;
        undef $create;

        return;
}

=for TODO

sub _signal {
        my $s = shift;
        warn "catched SIG $s\n";
        finish();
        exit(0);
}

$SIG{'__DIE__'} = \&_signal;
$SIG{'INT'} = \&_signal;
$SIG{'QUIT'} = \&_signal;

=cut

=head2 snippet

  my $short = $self->snippet( 50, $text );


=cut

sub snippet {
        my $self = shift;

        my $len = shift or die "no len?";
        my $m = join(" ", @_);

        $m =~ s/\s+/ /gs;

        if (length($m) > $len) {
                return substr($m,0,$len) . '...';
        } else {
                return $m;
        }
}

1;
1	dpavlin	47	package Grep::Search;
2
3			use strict;
4			use warnings;
5
6			use Data::Dump qw/dump/;
7			use Lucene;
8			use Jifty::Util;
9
10			my $index_path = Jifty::Util->app_root . '/var/lucene';
11
12			my ( $analyzer, $store, $writer );
13
14	dpavlin	53	my $debug = 1;
15	dpavlin	58	my $create;
16	dpavlin	47
17	dpavlin	49	sub create {
18	dpavlin	47
19	dpavlin	58	if (defined( $create )) {
20			Jifty->log->debug("using previous create $create");
21			return $create;
22			}
23
24	dpavlin	47	if (! -e "$index_path/segments") {
25			$create = 1;
26	dpavlin	58	Jifty->log->debug("create index $index_path");
27	dpavlin	47	} else {
28	dpavlin	58	$create = 0;
29			Jifty->log->debug("open index: $index_path");
30	dpavlin	47	}
31	dpavlin	49	return $create;
32	dpavlin	47	}
33
34	dpavlin	49	sub analyzer {
35			my $self = shift;
36			$analyzer \|\|= new Lucene::Analysis::Standard::StandardAnalyzer();
37			return $analyzer;
38			}
39
40			sub store {
41			my $self = shift;
42
43			$store \|\|= Lucene::Store::FSDirectory->getDirectory( $index_path, $self->create );
44			return $store;
45			}
46
47			sub writer {
48			my $self = shift;
49			$writer \|\|= new Lucene::Index::IndexWriter( $self->store, $self->analyzer, $self->create );
50			return $writer;
51			}
52
53	dpavlin	47	=head2 add
54
55	dpavlin	64	Grep::Search->add( $record, $owner_id );
56	dpavlin	47
57			=cut
58
59			sub add {
60			my $self = shift;
61
62			my $i = shift or die "no record to add";
63	dpavlin	64	my $uid = shift;
64	dpavlin	47
65			die "record not Jifty::Record but ", ref $i unless ($i->isa('Jifty::Record'));
66
67			my $pk = { $i->primary_keys };
68
69			my $doc = new Lucene::Document;
70
71			my @columns = map { $_->name } $i->columns;
72
73			foreach my $c ( @columns ) {
74
75			my $v = $i->$c;
76
77			if ( ref($v) ne '' ) {
78	dpavlin	53
79			foreach my $f_c ( qw/id name title/ ) {
80			if ( $i->$c->can( $f_c ) ) {
81			my $f_v = $i->$c->$f_c \|\| $i->$c->{values}->{ $f_c };
82			my $col = $c . '_' . $f_c;
83			if ( $f_v ) {
84			warn " # $col = $f_v\n" if ($debug);
85			$doc->add(Lucene::Document::Field->Text( $col, $f_v ));
86			} else {
87			warn " . $col is NULL\n" if ($debug);
88			}
89			}
90			}
91
92			if ($v->isa('Jifty::DateTime')) {
93	dpavlin	47	warn " d $c = $v\n" if ($debug);
94			$doc->add(Lucene::Document::Field->Keyword( $c, "$v" ));
95			} else {
96			warn " s $c = $v [",ref($v),"]\n" if ($debug);
97			}
98			next;
99			}
100
101			next if (! defined($v) \|\| $v eq '');
102
103			$v =~ s/<[^>]+>/ /gs;
104
105			if ( defined( $pk->{$c} ) ) {
106			$doc->add(Lucene::Document::Field->Keyword( $c, $v ));
107			warn " * $c = $v\n" if ($debug);
108			} else {
109			$doc->add(Lucene::Document::Field->Text( $c, $v ));
110	dpavlin	53	warn " + $c = ", $self->snippet( 50, $v ), "\n" if ($debug);
111	dpavlin	47	}
112			}
113
114	dpavlin	64	# add _owner_id to speed up filtering of search results
115			$uid \|\|= Jifty->web->current_user->id;
116			$doc->add(Lucene::Document::Field->Keyword( '_owner_id', $uid ));
117
118	dpavlin	49	$self->writer->addDocument($doc);
119	dpavlin	47
120	dpavlin	64	Jifty->log->debug("added ", $i->id, " for user $uid to index");
121	dpavlin	47	}
122
123			=head2
124
125			my $ItemCollection = Grep::Search->collection( 'search query' );
126
127			=cut
128
129			sub collection {
130			my $self = shift;
131
132			my $q = shift or die "no q?";
133
134	dpavlin	58	return if ( $self->create );
135
136	dpavlin	49	my $searcher = new Lucene::Search::IndexSearcher($self->store);
137			my $parser = new Lucene::QueryParser("content", $self->analyzer);
138	dpavlin	47
139	dpavlin	64	my $full_q = "($q) AND _owner_id:" . Jifty->web->current_user->id;
140
141			my $query = $parser->parse( $full_q );
142
143	dpavlin	60	Jifty->log->debug("searching for '$q' using ", $query->toString);
144	dpavlin	47
145			my $hits = $searcher->search($query);
146			my $num_hits = $hits->length();
147
148			Jifty->log->debug("found $num_hits results");
149
150			my $collection = Grep::Model::ItemCollection->new();
151
152			my @results;
153
154			for ( my $i = 0; $i < $num_hits; $i++ ) {
155
156			my $doc = $hits->doc( $i );
157
158			my $score = $hits->score($i);
159			my $title = $doc->get("title");
160			my $id = $doc->get("id");
161
162			warn "## $i $score $title\n";
163
164			my $item = Grep::Model::Item->new();
165			my ($ok,$msg) = $item->load_by_cols( id => $id );
166
167			if ( $ok ) {
168			$collection->add_record( $item );
169			} else {
170			warn "can't load item $id\n";
171			}
172
173			}
174
175			undef $hits;
176			undef $query;
177			undef $parser;
178			undef $searcher;
179
180			return $collection;
181			}
182
183			=head2 finish
184
185			Grep::Search->finish
186
187			=cut
188
189			sub finish {
190			my $self = shift;
191			if ($writer) {
192			warn "closing index\n";
193			$writer->close;
194			}
195			undef $writer;
196	dpavlin	58	undef $create;
197
198			return;
199	dpavlin	47	}
200
201	dpavlin	57	=for TODO
202
203	dpavlin	47	sub _signal {
204			my $s = shift;
205			warn "catched SIG $s\n";
206			finish();
207			exit(0);
208			}
209
210			$SIG{'__DIE__'} = \&_signal;
211			$SIG{'INT'} = \&_signal;
212			$SIG{'QUIT'} = \&_signal;
213
214	dpavlin	57	=cut
215	dpavlin	53
216			=head2 snippet
217
218			my $short = $self->snippet( 50, $text );
219
220
221			=cut
222
223			sub snippet {
224			my $self = shift;
225
226			my $len = shift or die "no len?";
227			my $m = join(" ", @_);
228
229			$m =~ s/\s+/ /gs;
230
231			if (length($m) > $len) {
232			return substr($m,0,$len) . '...';
233			} else {
234			return $m;
235			}
236			}
237
238	dpavlin	47	1;