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

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Revision 185 - (show annotations)
Wed Apr 9 17:39:40 2008 UTC (15 years, 10 months ago) by dpavlin
Original Path: lib/Grep/Search.pm
File size: 6351 byte(s)
don't open invindexer if we are only searching
1 package Grep::Search;
2
3 use strict;
4 use warnings;
5 use base qw( Class::Accessor );
6 Grep::Search->mk_accessors( qw( create index_path hits ) );
7
8 use Data::Dump qw/dump/;
9 use KinoSearch::InvIndexer;
10 use KinoSearch::Searcher;
11 use Jifty::Util;
12
13 my $debug = 1;
14
15 =head1 NAME
16
17 Grep::Search - full text search using L<KinoSearch>
18
19 =head1 METHODS
20
21 =head2 new
22
23 my $search = Grep::Search->new();
24
25 my $search = Grep::Search->new( create => 1 );
26
27 =cut
28
29 sub log { Jifty->web->log }
30
31 sub new {
32 my $class = shift;
33 my $self = $class->SUPER::new(@_);
34
35 my $index_path = Jifty::Util->app_root . '/var/invindex';
36
37 $self->index_path( $index_path );
38
39 return $self;
40 }
41
42 =head2 invindexer
43
44 Accessor to call any method defined on L<KinoSearch::InvIndexer>
45
46 $search->invindexer->delete_by_term( 'id', 42 );
47
48 =cut
49
50 my $indexes;
51
52 sub invindexer {
53 my $self = shift;
54 my $invindexer;
55 my $index_path = $self->index_path or die "no index_path?";
56
57 if ( $invindexer = $indexes->{$index_path} ) {
58 $self->log->debug("Using cached index $index_path");
59 } else {
60 if ( ! -e "$index_path" || $self->create ) {
61 $self->log->debug("Creating new index $index_path");
62 my $invindexer = KinoSearch::InvIndexer->new( invindex => Grep::Search::Schema->clobber( $index_path ) );
63 } else {
64 $self->log->debug("Opening index: $index_path");
65 $invindexer = KinoSearch::InvIndexer->new( invindex => Grep::Search::Schema->open( $index_path ) );
66 }
67 $indexes->{$index_path} = $invindexer;
68 }
69
70 $self->invindexer( $invindexer );
71
72 }
73
74 =head2 add
75
76 $search->add( $record, $owner_id );
77
78 =cut
79
80 sub add {
81 my $self = shift;
82
83 my $i = shift or die "no record to add";
84 my $uid = shift;
85
86 die "record not Jifty::Record but ", ref $i unless ($i->isa('Jifty::Record'));
87
88 my $pk = { $i->primary_keys };
89
90 my $doc;
91
92 my @columns = map { $_->name } $i->columns;
93
94 foreach my $c ( @columns ) {
95
96 my $v = $i->$c;
97
98 if ( ref($v) ne '' ) {
99
100 foreach my $f_c ( qw/id name title/ ) {
101 if ( $i->$c->can( $f_c ) ) {
102 my $f_v = $i->$c->$f_c || $i->$c->{values}->{ $f_c };
103 my $col = $c . '_' . $f_c;
104 if ( $f_v ) {
105 warn " # $col = $f_v\n" if ($debug);
106 $doc->{ $col } = $f_v;
107 } else {
108 warn " . $col is NULL\n" if ($debug);
109 }
110 }
111 }
112
113 if ($v->isa('Jifty::DateTime')) {
114 warn " d $c = $v\n" if ($debug);
115 $doc->{$c} = $v;
116 } else {
117 warn " s $c = $v [",ref($v),"]\n" if ($debug);
118 }
119 next;
120 }
121
122 next if (! defined($v) || $v eq '');
123
124 eval { $v =~ s/<[^>]+>/ /gs; };
125 if ($@) {
126 Jifty->log->error("can't strip html from $c in item ", $i->id);
127 next;
128 }
129
130 if ( defined( $pk->{$c} ) ) {
131 $doc->{ $c } = $v;
132 warn " * $c = $v\n" if ($debug);
133 } else {
134 $doc->{ $c } = $v;
135 warn " + $c = ", $self->snippet( 50, $v ), "\n" if ($debug);
136 }
137 }
138
139 # add _owner_id to speed up filtering of search results
140 $uid ||= Jifty->web->current_user->id;
141 $doc->{ '_owner_id' } = $uid;
142
143 $self->invindexer->add_doc( $doc );
144
145 $self->log->debug("added ", $i->id, " for user $uid to index");
146
147 return 1;
148 }
149
150 =head2 collection
151
152 Return C<Grep::Model::ItemCollection> which is result of C<search query>
153
154 my $ItemCollection = $search->collection( 'search query' );
155
156 =head2 hits
157
158 Return number of results from last C<collection> call
159
160 my $num_results = $search->hits;
161
162 =cut
163
164 sub collection {
165 my $self = shift;
166
167 my $q = shift or die "no q?";
168
169 my $searcher = KinoSearch::Searcher->new(
170 invindex => Grep::Search::Schema->open( $self->index_path ), );
171 $self->log->debug("$searcher created");
172
173 my $full_q = "($q)";
174
175 my $uid = Jifty->web->current_user->id;
176 $full_q .= ' AND _owner_id:' . $uid if (defined $uid);
177
178 $self->log->debug("searching for '$q' using $full_q");
179
180 my $query_parser = KinoSearch::QueryParser->new(
181 schema => Grep::Search::Schema->new,
182 fields => [ qw/ title link content summary category author / ],
183 );
184 $query_parser->set_heed_colons(1); # enable field:value AND/OR/NOT syntax
185 my $query = $query_parser->parse( $full_q );
186 my $hits = $searcher->search(
187 query => $query,
188 # offset => $offset,
189 # num_wanted => $hits_per_page,
190 );
191
192 $self->hits( $hits->total_hits );
193
194 $self->log->debug("found ", $self->hits, " results");
195
196 my $collection = Grep::Model::ItemCollection->new();
197
198 my @results;
199
200 my $i = 0;
201 while ( my $hit = $hits->fetch_hit ) {
202
203 my $score = $hit->{score};
204 my $title = $hit->{title};
205 my $id = $hit->{id};
206
207 $self->log->debug("result $i [$id] $title $score");
208
209 my $item = Grep::Model::Item->new();
210 my ($ok,$msg) = $item->load_by_cols( id => $id );
211
212 if ( $ok ) {
213 $collection->add_record( $item );
214 } else {
215 warn "can't load item $id\n";
216 }
217
218 }
219
220 $self->log->debug("finished search");
221
222 return $collection;
223 }
224
225 =head2 finish
226
227 $search->finish
228
229 =cut
230
231 sub finish {
232 my $self = shift;
233 if ($self->invindexer) {
234 $self->log->debug("closing index");
235 $self->invindexer->finish;
236 }
237
238 $self->log->debug("finish");
239
240 undef $self;
241
242 return 1;
243 }
244
245 =head2 snippet
246
247 my $short = $self->snippet( 50, $text );
248
249 =cut
250
251 sub snippet {
252 my $self = shift;
253
254 my $len = shift or die "no len?";
255 my $m = join(" ", @_);
256
257 $m =~ s/\s+/ /gs;
258
259 if (length($m) > $len) {
260 return substr($m,0,$len) . '...';
261 } else {
262 return $m;
263 }
264 }
265
266 package Grep::Search::KeywordField;
267 use base qw( KinoSearch::Schema::FieldSpec );
268 sub analyzed { 0 }
269 #sub indexed { 1 }
270 #sub stored { 1 }
271 sub vectorized { 0 }
272
273 package Grep::Search::Schema;
274
275 =head1 NAME
276
277 Grep::Search::Schema - schema definition for full-text search
278
279 =cut
280
281 use base 'KinoSearch::Schema';
282 use KinoSearch::Analysis::PolyAnalyzer;
283
284 our %fields = (
285 id => 'Grep::Search::KeywordField',
286
287 in_feed_id => 'Grep::Search::KeywordField',
288 in_feed_url => 'Grep::Search::KeywordField',
289 in_feed_title => 'KinoSearch::Schema::FieldSpec',
290 in_feed_owner => 'Grep::Search::KeywordField',
291 in_feed_created_on => 'Grep::Search::KeywordField',
292
293 title => 'KinoSearch::Schema::FieldSpec',
294 link => 'Grep::Search::KeywordField',
295 content => 'KinoSearch::Schema::FieldSpec',
296 summary => 'KinoSearch::Schema::FieldSpec',
297 category => 'KinoSearch::Schema::FieldSpec',
298 author => 'KinoSearch::Schema::FieldSpec',
299 created_on => 'Grep::Search::KeywordField',
300 last_update => 'Grep::Search::KeywordField',
301
302 _owner_id => 'Grep::Search::KeywordField',
303 );
304
305 sub analyzer {
306 return KinoSearch::Analysis::PolyAnalyzer->new( language => 'en' );
307 }
308
309 1;

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