WebPAC/Output/EstraierNative.pm

package WebPAC::Output::EstraierNative;

use warnings;
use strict;

use base qw/WebPAC::Common/;

use Estraier;
use Encode qw/from_to/;
use Data::Dumper;
use LWP;
use URI::Escape;
use List::Util qw/first/;
use File::Path;

$Estraier::DEBUG = 1;


=head1 NAME

WebPAC::Output::EstraierNative - Create Hyper Estraier full text index using native bindings

=head1 VERSION

Version 0.2

=cut

our $VERSION = '0.2';

=head1 SYNOPSIS

Create full text index using Hyper Estraier index from data with
type C<search>.

=head1 FUNCTIONS

=head2 new

Connect to Hyper Estraier index using HTTP

 my $est = new WebPAC::Output::Estraier(
        path => 'casket/',
        database => 'demo',
        label => 'node label',
        encoding => 'iso-8859-2',
        clean => 1,
 );

Options are:

=over 4

=item path

full or relative path to Hyper Estraier database

=item database

name of database from which data comes

=item label

label for node (optional)

=item encoding

character encoding of C<data_structure> if it's differenet than C<ISO-8859-2>
(and it probably is). This encoding will be converted to C<UTF-8> for
Hyper Estraier.

=back

Name of database will be used to form URI of documents in index.

=cut

sub new {
        my $class = shift;
        my $self = {@_};
        bless($self, $class);

        my $log = $self->_get_logger;

        #$log->debug("self: ", sub { Dumper($self) });

        foreach my $p (qw/path database/) {
                $log->logdie("need $p") unless ($self->{$p});
        }

        $self->{encoding} ||= 'ISO-8859-2';

        $self->{label} ||= "WebPAC $self->{database}";

        my $path = 'casket';
        $path =~ s!/+$!!;

        $self->{_casket_path} = $path;

        $path .= '.tmp';
        if (-e $path) {
                rmtree($path) || $log->logdie("can't remove old temporary directory $path: $!");
        }
        mkpath($path) || $log->logdie("can't create new temporary directory $path: $!");

        my $db = new Database();
        unless($db->open($path, Database::DBWRITER | Database::DBCREAT)) {
                $log->logdie("can't open $path: ", $db->err_msg($db->error()) );
        }

        $self->{db} = $db;

        $log->info("using ", $self->{clean} ? "new " : "", "index $self->{path} '$self->{label}' with encoding $self->{encoding}");

        $self ? return $self : return undef;
}


=head2 add

Adds one entry to database.

  $est->add(
        id => 42,
        ds => $ds,
        type => 'display',
        text => 'optional text from which snippet is created',
  );

This function will create  entries in index using following URI format:

  C<file:///type/database%20name/000>

Each tag in C<data_structure> with specified C<type> will create one
attribute and corresponding hidden text (used for search).

=cut

sub add {
        my $self = shift;

        my $args = {@_};

        my $log = $self->_get_logger;

        my $database = $self->{'database'} || $log->logconfess('no database in $self');
        $log->logconfess('need db in object') unless ($self->{'db'});

        foreach my $p (qw/id ds type/) {
                $log->logdie("need $p") unless ($args->{$p});
        }

        my $type = $args->{'type'};
        my $id = $args->{'id'};

        my $uri = "file:///$type/$database/$id";
        $log->debug("creating $uri");

        my $doc = new Document();
        $doc->add_attr('@uri', $self->convert($uri) );

        # store type and database name
        $doc->add_attr('_database', $database );
        $doc->add_attr('_type', $type );

        $log->debug("ds = ", sub { Dumper($args->{'ds'}) } );

        # filter all tags which have type defined
        my @tags = grep {
                ref($args->{'ds'}->{$_}) eq 'HASH' && defined( $args->{'ds'}->{$_}->{$type} )
        } keys %{ $args->{'ds'} };

        $log->debug("tags = ", join(",", @tags));

        return unless (@tags);

        foreach my $tag (@tags) {

                $log->debug("$tag :: $type == ",Dumper( $args->{'ds'}->{$tag}->{$type} ) );

                my $vals = join(" ", @{ $args->{'ds'}->{$tag}->{$type} });

                next if (! $vals);

                $vals = join(" ") if (ref($vals) eq 'ARRAY');

                $vals = $self->convert( $vals ) or
                        $log->logdie("can't convert '$vals' to UTF-8");

                $doc->add_attr( $tag, $vals );
                $doc->add_hidden_text( $vals );
        }

        my $text = $args->{'text'};
        if ( $text ) {
                $text = $self->convert( $text ) or
                        $log->logdie("can't convert '$text' to UTF-8");
                $doc->add_text( $text );
        }

        $log->debug("adding ", sub { $doc->dump_draft } );
        $self->{'db'}->put_doc($doc, Database::PDCLEAN) || $log->warn("can't add document $uri with draft " . $doc->dump_draft . " to node " . $self->{path} . " status: " . $self->{db}->status());

        return 1;
}

=head2 add_link

  $est->add_link(
        from => 'ps',
        to => 'webpac2',
        credit => 10000,
  );

=cut

sub add_link {
        my $self = shift;

        my $args = {@_};
        my $log = $self->_get_logger;

        $log->warn("add_link is not implemented");
        return;

        foreach my $p (qw/from to credit/) {
                $log->logdie("need $p") unless ($args->{$p});
        }

        my $node = first { $_->{name} eq $args->{to} } $self->master( action => 'nodelist' );

        if (! $node) {
                $log->warn("can't find node $args->{to}, skipping link creaton");
                return;
        }

        my $label = $node->{label};

        if (! $label) {
                $log->warn("can't find label for $args->{to}, skipping link creaton");
                return;
        }

        $log->debug("using label $label for $args->{to}");

        return $self->{db}->set_link(
                $self->{masterurl} . '/node/' . $args->{to},
                $label,
                $args->{credit},
        );
}


=head2 finish

Close index and rename of to final path

        $est->finish;

=cut

sub finish {
        my $self = shift;

        my $log = $self->_get_logger;
        $log->info("closing Hyper Estraier index make it current...");

        $self->{db}->close || $log->logdie("can't close index");

        my $path = $self->{_casket_path} || $log->logdie("no _casket_path?");

        if (-e $path) {
                $log->warn("removing old $path");
                rmtree($path) || $log->logdie("can't remove old temporary directory $path: $!");
        }

        rename $path . '.tmp', $path || $log->logdie("can't rename ${path}.tmp -> $path: $!");

}


=head2 convert

 my $utf8_string = $self->convert('string in codepage');

=cut

sub convert {
        my $self = shift;

        my $text = shift || return;
        from_to($text, $self->{encoding}, 'UTF-8');
        return $text;
}

=head1 AUTHOR

Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>

=head1 COPYRIGHT & LICENSE

Copyright 2005 Dobrica Pavlinusic, All Rights Reserved.

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

=cut

1; # End of WebPAC::Output::Estraier
1	package WebPAC::Output::EstraierNative;
2
3	use warnings;
4	use strict;
5
6	use base qw/WebPAC::Common/;
7
8	use Estraier;
9	use Encode qw/from_to/;
10	use Data::Dumper;
11	use LWP;
12	use URI::Escape;
13	use List::Util qw/first/;
14	use File::Path;
15
16	$Estraier::DEBUG = 1;
17
18
19	=head1 NAME
20
21	WebPAC::Output::EstraierNative - Create Hyper Estraier full text index using native bindings
22
23	=head1 VERSION
24
25	Version 0.2
26
27	=cut
28
29	our $VERSION = '0.2';
30
31	=head1 SYNOPSIS
32
33	Create full text index using Hyper Estraier index from data with
34	type C<search>.
35
36	=head1 FUNCTIONS
37
38	=head2 new
39
40	Connect to Hyper Estraier index using HTTP
41
42	my $est = new WebPAC::Output::Estraier(
43	path => 'casket/',
44	database => 'demo',
45	label => 'node label',
46	encoding => 'iso-8859-2',
47	clean => 1,
48	);
49
50	Options are:
51
52	=over 4
53
54	=item path
55
56	full or relative path to Hyper Estraier database
57
58	=item database
59
60	name of database from which data comes
61
62	=item label
63
64	label for node (optional)
65
66	=item encoding
67
68	character encoding of C<data_structure> if it's differenet than C<ISO-8859-2>
69	(and it probably is). This encoding will be converted to C<UTF-8> for
70	Hyper Estraier.
71
72	=back
73
74	Name of database will be used to form URI of documents in index.
75
76	=cut
77
78	sub new {
79	my $class = shift;
80	my $self = {@_};
81	bless($self, $class);
82
83	my $log = $self->_get_logger;
84
85	#$log->debug("self: ", sub { Dumper($self) });
86
87	foreach my $p (qw/path database/) {
88	$log->logdie("need $p") unless ($self->{$p});
89	}
90
91	$self->{encoding} \|\|= 'ISO-8859-2';
92
93	$self->{label} \|\|= "WebPAC $self->{database}";
94
95	my $path = 'casket';
96	$path =~ s!/+$!!;
97
98	$self->{_casket_path} = $path;
99
100	$path .= '.tmp';
101	if (-e $path) {
102	rmtree($path) \|\| $log->logdie("can't remove old temporary directory $path: $!");
103	}
104	mkpath($path) \|\| $log->logdie("can't create new temporary directory $path: $!");
105
106	my $db = new Database();
107	unless($db->open($path, Database::DBWRITER \| Database::DBCREAT)) {
108	$log->logdie("can't open $path: ", $db->err_msg($db->error()) );
109	}
110
111	$self->{db} = $db;
112
113	$log->info("using ", $self->{clean} ? "new " : "", "index $self->{path} '$self->{label}' with encoding $self->{encoding}");
114
115	$self ? return $self : return undef;
116	}
117
118
119	=head2 add
120
121	Adds one entry to database.
122
123	$est->add(
124	id => 42,
125	ds => $ds,
126	type => 'display',
127	text => 'optional text from which snippet is created',
128	);
129
130	This function will create entries in index using following URI format:
131
132	C<file:///type/database%20name/000>
133
134	Each tag in C<data_structure> with specified C<type> will create one
135	attribute and corresponding hidden text (used for search).
136
137	=cut
138
139	sub add {
140	my $self = shift;
141
142	my $args = {@_};
143
144	my $log = $self->_get_logger;
145
146	my $database = $self->{'database'} \|\| $log->logconfess('no database in $self');
147	$log->logconfess('need db in object') unless ($self->{'db'});
148
149	foreach my $p (qw/id ds type/) {
150	$log->logdie("need $p") unless ($args->{$p});
151	}
152
153	my $type = $args->{'type'};
154	my $id = $args->{'id'};
155
156	my $uri = "file:///$type/$database/$id";
157	$log->debug("creating $uri");
158
159	my $doc = new Document();
160	$doc->add_attr('@uri', $self->convert($uri) );
161
162	# store type and database name
163	$doc->add_attr('_database', $database );
164	$doc->add_attr('_type', $type );
165
166	$log->debug("ds = ", sub { Dumper($args->{'ds'}) } );
167
168	# filter all tags which have type defined
169	my @tags = grep {
170	ref($args->{'ds'}->{$_}) eq 'HASH' && defined( $args->{'ds'}->{$_}->{$type} )
171	} keys %{ $args->{'ds'} };
172
173	$log->debug("tags = ", join(",", @tags));
174
175	return unless (@tags);
176
177	foreach my $tag (@tags) {
178
179	$log->debug("$tag :: $type == ",Dumper( $args->{'ds'}->{$tag}->{$type} ) );
180
181	my $vals = join(" ", @{ $args->{'ds'}->{$tag}->{$type} });
182
183	next if (! $vals);
184
185	$vals = join(" ") if (ref($vals) eq 'ARRAY');
186
187	$vals = $self->convert( $vals ) or
188	$log->logdie("can't convert '$vals' to UTF-8");
189
190	$doc->add_attr( $tag, $vals );
191	$doc->add_hidden_text( $vals );
192	}
193
194	my $text = $args->{'text'};
195	if ( $text ) {
196	$text = $self->convert( $text ) or
197	$log->logdie("can't convert '$text' to UTF-8");
198	$doc->add_text( $text );
199	}
200
201	$log->debug("adding ", sub { $doc->dump_draft } );
202	$self->{'db'}->put_doc($doc, Database::PDCLEAN) \|\| $log->warn("can't add document $uri with draft " . $doc->dump_draft . " to node " . $self->{path} . " status: " . $self->{db}->status());
203
204	return 1;
205	}
206
207	=head2 add_link
208
209	$est->add_link(
210	from => 'ps',
211	to => 'webpac2',
212	credit => 10000,
213	);
214
215	=cut
216
217	sub add_link {
218	my $self = shift;
219
220	my $args = {@_};
221	my $log = $self->_get_logger;
222
223	$log->warn("add_link is not implemented");
224	return;
225
226	foreach my $p (qw/from to credit/) {
227	$log->logdie("need $p") unless ($args->{$p});
228	}
229
230	my $node = first { $_->{name} eq $args->{to} } $self->master( action => 'nodelist' );
231
232	if (! $node) {
233	$log->warn("can't find node $args->{to}, skipping link creaton");
234	return;
235	}
236
237	my $label = $node->{label};
238
239	if (! $label) {
240	$log->warn("can't find label for $args->{to}, skipping link creaton");
241	return;
242	}
243
244	$log->debug("using label $label for $args->{to}");
245
246	return $self->{db}->set_link(
247	$self->{masterurl} . '/node/' . $args->{to},
248	$label,
249	$args->{credit},
250	);
251	}
252
253
254	=head2 finish
255
256	Close index and rename of to final path
257
258	$est->finish;
259
260	=cut
261
262	sub finish {
263	my $self = shift;
264
265	my $log = $self->_get_logger;
266	$log->info("closing Hyper Estraier index make it current...");
267
268	$self->{db}->close \|\| $log->logdie("can't close index");
269
270	my $path = $self->{_casket_path} \|\| $log->logdie("no _casket_path?");
271
272	if (-e $path) {
273	$log->warn("removing old $path");
274	rmtree($path) \|\| $log->logdie("can't remove old temporary directory $path: $!");
275	}
276
277	rename $path . '.tmp', $path \|\| $log->logdie("can't rename ${path}.tmp -> $path: $!");
278
279	}
280
281
282	=head2 convert
283
284	my $utf8_string = $self->convert('string in codepage');
285
286	=cut
287
288	sub convert {
289	my $self = shift;
290
291	my $text = shift \|\| return;
292	from_to($text, $self->{encoding}, 'UTF-8');
293	return $text;
294	}
295
296	=head1 AUTHOR
297
298	Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
299
300	=head1 COPYRIGHT & LICENSE
301
302	Copyright 2005 Dobrica Pavlinusic, All Rights Reserved.
303
304	This program is free software; you can redistribute it and/or modify it
305	under the same terms as Perl itself.
306
307	=cut
308
309	1; # End of WebPAC::Output::Estraier