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                 $self->decompose($term);
  23
  24                 my $newterm = join('&', $self->words);
  25
  26                 if (@{$self->nots}) {
  27                         $newterm = '('.$newterm.')&!('. join('|', $self->nots) . ')';
  28                 }
  29
  30                 $log->debug("Compiled term is [$newterm]", DEBUG);
  31                 $newterm = OpenILS::Application::Storage::Driver::Pg->quote($newterm);
  32                 $log->debug("Quoted term is [$newterm]", DEBUG);
  33
  34                 $self->{fts_query} = ["to_tsquery('default',$newterm)"];
  35                 $self->{fts_query_nots} = [];
  36                 $self->{fts_op} = '@@';
  37                 $self->{text_col} = shift;
  38                 $self->{fts_col} = shift;
  39
  40                 return $self;
  41         }
  42
  43         sub sql_where_clause {
  44                 my $self = shift;
  45                 my $column = $self->fts_col;
  46                 my @output;
  47
  48                 my @ranks;
  49                 for my $fts ( $self->fts_query ) {
  50                         push @output, join(' ', $self->fts_col, $self->{fts_op}, $fts);
  51                         push @ranks, "rank($column, $fts)";
  52                 }
  53                 $self->{fts_rank} = \@ranks;
  54
  55                 my $phrase_match = $self->sql_exact_phrase_match();
  56                 return join(' AND ', @output) . $phrase_match;
  57         }
  58
  59 }
  60
  61 1;