Open-ILS/src/perlmods/OpenILS/Application/Storage/Driver/Pg/fts.pm

   1 { # Every driver needs to provide a 'compile()' method to OpenILS::Application::Storage::FTS.
   2   # If that driver wants to support FTI, that is...
   3         #-------------------------------------------------------------------------------
   4         package OpenILS::Application::Storage::FTS;
   5         use OpenSRF::Utils::Logger qw/:level/;
   6         use Unicode::Normalize;
   7         my $log = 'OpenSRF::Utils::Logger';
   8
   9         sub compile {
  10                 my $self = shift;
  11                 my $term = NFD(shift());
  12
  13                 $log->debug("Raw term: $term",DEBUG);
  14
  15                 $term =~ s/\&//go;
  16                 $term =~ s/\|//go;
  17
  18                 $self = ref($self) || $self;
  19                 $self = bless {} => $self;
  20
  21                 $term =~ s/(\pM+)//gos;
  22                 $term =~ s/(\b\.\b)//gos;
  23                 $self->decompose($term);
  24
  25                 my $newterm = '';
  26                 $newterm = join('&', $self->words) if ($self->words);
  27
  28                 if (@{$self->nots}) {
  29                         $newterm = '('.$newterm.')&' if ($newterm);
  30                         $newterm .= '!('. join('|', $self->nots) . ')';
  31                 }
  32
  33                 $log->debug("Compiled term is [$newterm]", DEBUG);
  34                 $newterm = OpenILS::Application::Storage::Driver::Pg->quote($newterm);
  35                 $log->debug("Quoted term is [$newterm]", DEBUG);
  36
  37                 $self->{fts_query} = ["to_tsquery('default',$newterm)"];
  38                 $self->{fts_query_nots} = [];
  39                 $self->{fts_op} = '@@';
  40                 $self->{text_col} = shift;
  41                 $self->{fts_col} = shift;
  42
  43                 return $self;
  44         }
  45
  46         sub sql_where_clause {
  47                 my $self = shift;
  48                 my $column = $self->fts_col;
  49                 my @output;
  50
  51                 my @ranks;
  52                 for my $fts ( $self->fts_query ) {
  53                         push @output, join(' ', $self->fts_col, $self->{fts_op}, $fts);
  54                         push @ranks, "rank($column, $fts)";
  55                 }
  56                 $self->{fts_rank} = \@ranks;
  57
  58                 my $phrase_match = $self->sql_exact_phrase_match();
  59                 return join(' AND ', @output) . $phrase_match;
  60         }
  61
  62         sub sql_exact_phrase_match {
  63                 my $self = shift;
  64                 my $column = $self->text_col;
  65                 my $output = '';
  66                 for my $phrase ( $self->phrases ) {
  67                         $phrase =~ s/\*/\\*/go;
  68                         $phrase =~ s/\./\\./go;
  69                         $phrase =~ s/'/\\'/go;
  70                         $phrase =~ s/\s+/\\s+/go;
  71                         $log->debug("Adding phrase [$phrase] to the match list", DEBUG);
  72                         $output .= " AND $column ~* \$\$(^|\\W+)$phrase(\\W+|\$)\$\$";
  73                 }
  74                 $log->debug("Phrase list is [$output]", DEBUG);
  75                 return $output;
  76         }
  77
  78 }
  79
  80 1;