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package WebPAC::Search::Estraier; |
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|
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use warnings; |
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use strict; |
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|
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use HyperEstraier; |
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use Text::Iconv; |
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use Data::Dumper; |
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|
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=head1 NAME |
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|
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WebPAC::Search::Estraier - search Hyper Estraier full text index |
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|
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=head1 VERSION |
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|
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Version 0.03 |
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|
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=cut |
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|
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our $VERSION = '0.03'; |
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|
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=head1 SYNOPSIS |
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|
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Search WebPAC data using Hyper Estraier full text index created with |
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L<WebPAC::Output::Estraier>. |
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|
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=head1 FUNCTIONS |
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|
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=head2 new |
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|
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Connect to Hyper Estraier index using HTTP |
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|
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my $est = new WebPAC::Search::Estraier( |
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url => 'http://localhost:1978/node/webpac2', |
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user => 'admin', |
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passwd => 'admin', |
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encoding => 'iso-8859-2', |
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log => $Log::Log4perl->log_object, |
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); |
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|
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Options are: |
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|
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=over 4 |
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|
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=item url |
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|
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URI to C<estmaster> node |
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|
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=item user |
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|
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C<estmaster> user with read rights |
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|
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=item passwd |
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|
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password for user |
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|
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=item encoding |
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|
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character encoding of C<data_structure> if it's differenet than C<ISO-8859-2> |
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(and it probably is). This encoding will be converted to C<UTF-8> for |
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Hyper Estraier. |
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|
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=item log |
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|
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L<Log::Log4perl> object or equivalent (C<< $c->log >> can be used in |
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L<Catalyst> and there is support for it). |
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|
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=back |
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|
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=cut |
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|
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sub new { |
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my $class = shift; |
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my $self = {@_}; |
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bless($self, $class); |
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|
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my $log = $self->_get_logger; |
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|
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foreach my $p (qw/url user passwd/) { |
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$log->logdie("need $p") unless ($self->{$p}); |
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} |
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|
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$log->info("opening Hyper Estraier index $self->{'url'} as $self->{'user'}"); |
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|
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$self->{'db'} = HyperEstraier::Node->new($self->{'url'}); |
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$self->{'db'}->set_auth($self->{'user'}, $self->{'passwd'}); |
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|
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my $encoding = $self->{'encoding'} || 'ISO-8859-2'; |
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$log->info("using encoding $encoding"); |
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|
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$self->{'iconv'} = new Text::Iconv('UTF-8', $encoding) or |
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$log->die("can't create conversion from UTF-8 to $encoding"); |
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|
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$self ? return $self : return undef; |
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} |
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|
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|
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=head2 search |
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|
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Locate items in index |
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|
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my @results = $est->search( |
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phrase => 'name of book or novel', |
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add_attr => [ |
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"filepath ISTRINC $q", |
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"size NUMGT 100", |
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], |
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get_attr => qw/PersonalName TitleProper/, |
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order => 'NUMD', |
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max => 100, |
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options => $HyperEstraier::Condition::SURE, |
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page => 42, |
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); |
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|
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Options are close match to Hyper Estraier API, except C<get_attr> which defines |
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attributes which will be returned in hash for each record. |
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|
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Results are returned as hash array with keys named by attributes |
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|
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Pages are numbered C< 1 ... hits/max >. |
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|
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=cut |
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|
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sub search { |
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my $self = shift; |
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|
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my $args = {@_}; |
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|
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my $log = $self->_get_logger; |
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|
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#$log->debug( 'search args: ' . Dumper($args) ); |
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|
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$self->confess('need db in object') unless ($self->{db}); |
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$self->confess('need get_attr') unless ($args->{get_attr}); |
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|
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$self->confess("need get_attr as array not " . ref($args->{get_attr}) ) unless (ref($args->{get_attr}) eq 'ARRAY'); |
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|
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my $q = $args->{phrase}; |
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|
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$log->debug("args: " . Dumper( $args )); |
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|
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my $cond = HyperEstraier::Condition->new(); |
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if ( ref($args->{add_attr}) eq 'ARRAY' ) { |
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$log->debug("adding search attributes: " . join(", ", @{ $args->{add_attr} }) ); |
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map { |
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$cond->add_attr( $self->{iconv}->convert( $_ ) ); |
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$log->debug(" + $_"); |
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} @{ $args->{add_attr} }; |
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}; |
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|
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$cond->set_phrase( $self->{iconv}->convert($q) ) if ($q); |
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$cond->set_options( $args->{options} ) if ($args->{options}); |
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$cond->set_order( $args->{order} ) if ($args->{order}); |
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|
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my $max = $args->{max} || 7; |
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my $page = $args->{page} || 1; |
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if ($page < 1) { |
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$log->warn("page number $page < 1"); |
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$page = 1; |
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} |
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|
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$cond->set_max( $page * $max ); |
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|
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my $result = $self->{db}->search($cond, 0) || |
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$log->die("can't search for ", sub { Dumper( $args ) }); |
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|
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my $hits = $result->doc_num; |
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$log->debug("found $hits hits for '$q'"); |
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|
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my @results; |
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|
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for my $i ( (($page - 1) * $max) .. ( $hits - 1 ) ) { |
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|
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#$log->debug("get_doc($i)"); |
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my $doc = $result->get_doc( $i ); |
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if (! $doc) { |
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$log->warn("can't find result $i"); |
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next; |
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} |
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|
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my $hash; |
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|
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foreach my $attr (@{ $args->{get_attr} }) { |
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my $val = $doc->attr( $attr ); |
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#$log->debug("attr $attr = ", $val || 'undef'); |
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$hash->{$attr} = $self->{iconv}->convert( $val ) if (defined($val)); |
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} |
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|
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if ($hash) { |
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push @results, $hash; |
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} |
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|
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} |
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|
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# $log->debug("results " . Dumper( \@results )); |
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|
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$self->confess("expected to return array") unless (wantarray); |
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|
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return @results; |
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} |
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|
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=head2 confess |
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|
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wrapper around L<Log::Log4perl> C<confess> or C<< $log->fatal >> or |
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C<< $log->error >> if they exists (like in L<Catalyst>), else plain |
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C<die>. |
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|
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=cut |
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|
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sub confess { |
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my $self = shift; |
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if (my $log = $self->{'log'}) { |
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if ($log->can('logconfess')) { |
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$log->logconfess(@_); |
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} elsif ($log->can('fatal')) { |
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$log->fatal(@_); |
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die @_; |
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} elsif ($log->can('error')) { |
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$log->error(@_); |
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} else { |
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die @_; |
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} |
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} else { |
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die @_; |
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} |
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} |
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|
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=head2 _get_logger |
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|
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For compatibility with same method from L<WebPAC::Common>, but without |
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need for it. |
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|
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=cut |
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|
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sub _get_logger { |
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my $self = shift; |
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|
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return $self->{'log'} || die "really need log!"; |
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} |
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|
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=head1 AUTHOR |
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|
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Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
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|
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=head1 COPYRIGHT & LICENSE |
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|
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Copyright 2005 Dobrica Pavlinusic, All Rights Reserved. |
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|
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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|
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=cut |
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|
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1; # End of WebPAC::Search::Estraier |
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