/[Grep]/lib/Grep/Search/KinoSearch.pm
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Contents of /lib/Grep/Search/KinoSearch.pm

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Revision 53 - (show annotations)
Wed Feb 21 16:06:25 2007 UTC (17 years ago) by dpavlin
Original Path: lib/Grep/Search.pm
File size: 3896 byte(s)
better unrolling of object values (why do I have to peek inside {values} to make title work?),
added snippet
1 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 my $debug = 1;
15
16 sub create {
17
18 my $create = 0;
19 if (! -e "$index_path/segments") {
20 $create = 1;
21 Jifty->log->debug("create index $index_path") unless ($store);
22 } else {
23 Jifty->log->debug("open index: $index_path") unless ($store);
24 }
25 return $create;
26 }
27
28 sub analyzer {
29 my $self = shift;
30 $analyzer ||= new Lucene::Analysis::Standard::StandardAnalyzer();
31 return $analyzer;
32 }
33
34 sub store {
35 my $self = shift;
36
37 $store ||= Lucene::Store::FSDirectory->getDirectory( $index_path, $self->create );
38 return $store;
39 }
40
41 sub writer {
42 my $self = shift;
43 $writer ||= new Lucene::Index::IndexWriter( $self->store, $self->analyzer, $self->create );
44 return $writer;
45 }
46
47 =head2 add
48
49 Grep::Search->add( $record );
50
51 =cut
52
53 sub add {
54 my $self = shift;
55
56 my $i = shift or die "no record to add";
57
58 die "record not Jifty::Record but ", ref $i unless ($i->isa('Jifty::Record'));
59
60 my $pk = { $i->primary_keys };
61
62 my $doc = new Lucene::Document;
63
64 my @columns = map { $_->name } $i->columns;
65
66 foreach my $c ( @columns ) {
67
68 my $v = $i->$c;
69
70 if ( ref($v) ne '' ) {
71
72 foreach my $f_c ( qw/id name title/ ) {
73 if ( $i->$c->can( $f_c ) ) {
74 my $f_v = $i->$c->$f_c || $i->$c->{values}->{ $f_c };
75 my $col = $c . '_' . $f_c;
76 if ( $f_v ) {
77 warn " # $col = $f_v\n" if ($debug);
78 $doc->add(Lucene::Document::Field->Text( $col, $f_v ));
79 } else {
80 warn " . $col is NULL\n" if ($debug);
81 }
82 }
83 }
84
85 if ($v->isa('Jifty::DateTime')) {
86 warn " d $c = $v\n" if ($debug);
87 $doc->add(Lucene::Document::Field->Keyword( $c, "$v" ));
88 } else {
89 warn " s $c = $v [",ref($v),"]\n" if ($debug);
90 }
91 next;
92 }
93
94 next if (! defined($v) || $v eq '');
95
96 $v =~ s/<[^>]+>/ /gs;
97
98 if ( defined( $pk->{$c} ) ) {
99 $doc->add(Lucene::Document::Field->Keyword( $c, $v ));
100 warn " * $c = $v\n" if ($debug);
101 } else {
102 $doc->add(Lucene::Document::Field->Text( $c, $v ));
103 warn " + $c = ", $self->snippet( 50, $v ), "\n" if ($debug);
104 }
105 }
106
107 $self->writer->addDocument($doc);
108
109 Jifty->log->debug("added ", $i->id, " to index");
110 }
111
112 =head2
113
114 my $ItemCollection = Grep::Search->collection( 'search query' );
115
116 =cut
117
118 sub collection {
119 my $self = shift;
120
121 my $q = shift or die "no q?";
122
123 my $searcher = new Lucene::Search::IndexSearcher($self->store);
124 my $parser = new Lucene::QueryParser("content", $self->analyzer);
125 my $query = $parser->parse( $q );
126
127 Jifty->log->debug("searching for '$q'");
128
129 my $hits = $searcher->search($query);
130 my $num_hits = $hits->length();
131
132 Jifty->log->debug("found $num_hits results");
133
134 my $collection = Grep::Model::ItemCollection->new();
135
136 my @results;
137
138 for ( my $i = 0; $i < $num_hits; $i++ ) {
139
140 my $doc = $hits->doc( $i );
141
142 my $score = $hits->score($i);
143 my $title = $doc->get("title");
144 my $id = $doc->get("id");
145
146 warn "## $i $score $title\n";
147
148 my $item = Grep::Model::Item->new();
149 my ($ok,$msg) = $item->load_by_cols( id => $id );
150
151 if ( $ok ) {
152 $collection->add_record( $item );
153 } else {
154 warn "can't load item $id\n";
155 }
156
157 }
158
159 undef $hits;
160 undef $query;
161 undef $parser;
162 undef $searcher;
163
164 return $collection;
165 }
166
167 =head2 finish
168
169 Grep::Search->finish
170
171 =cut
172
173 sub finish {
174 my $self = shift;
175 if ($writer) {
176 warn "closing index\n";
177 $writer->close;
178 }
179 undef $writer;
180 }
181
182 sub _signal {
183 my $s = shift;
184 warn "catched SIG $s\n";
185 finish();
186 exit(0);
187 }
188
189 $SIG{'__DIE__'} = \&_signal;
190 $SIG{'INT'} = \&_signal;
191 $SIG{'QUIT'} = \&_signal;
192
193
194 =head2 snippet
195
196 my $short = $self->snippet( 50, $text );
197
198
199 =cut
200
201 sub snippet {
202 my $self = shift;
203
204 my $len = shift or die "no len?";
205 my $m = join(" ", @_);
206
207 $m =~ s/\s+/ /gs;
208
209 if (length($m) > $len) {
210 return substr($m,0,$len) . '...';
211 } else {
212 return $m;
213 }
214 }
215
216 1;

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