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

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Revision 64 - (show annotations)
Wed Feb 21 20:22:07 2007 UTC (17 years ago) by dpavlin
Original Path: lib/Grep/Search.pm
File size: 4358 byte(s)
store _owner_id in index and add them to search queries so that we get just
rearch results we should see (as opposed to Jifty current_user_can throwing
them away much later)
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 my $create;
16
17 sub create {
18
19 if (defined( $create )) {
20 Jifty->log->debug("using previous create $create");
21 return $create;
22 }
23
24 if (! -e "$index_path/segments") {
25 $create = 1;
26 Jifty->log->debug("create index $index_path");
27 } else {
28 $create = 0;
29 Jifty->log->debug("open index: $index_path");
30 }
31 return $create;
32 }
33
34 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 =head2 add
54
55 Grep::Search->add( $record, $owner_id );
56
57 =cut
58
59 sub add {
60 my $self = shift;
61
62 my $i = shift or die "no record to add";
63 my $uid = shift;
64
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
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 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 warn " + $c = ", $self->snippet( 50, $v ), "\n" if ($debug);
111 }
112 }
113
114 # 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 $self->writer->addDocument($doc);
119
120 Jifty->log->debug("added ", $i->id, " for user $uid to index");
121 }
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 return if ( $self->create );
135
136 my $searcher = new Lucene::Search::IndexSearcher($self->store);
137 my $parser = new Lucene::QueryParser("content", $self->analyzer);
138
139 my $full_q = "($q) AND _owner_id:" . Jifty->web->current_user->id;
140
141 my $query = $parser->parse( $full_q );
142
143 Jifty->log->debug("searching for '$q' using ", $query->toString);
144
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 undef $create;
197
198 return;
199 }
200
201 =for TODO
202
203 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 =cut
215
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 1;

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