NAME

Wiki::Toolkit::Search::Lucy - Use Lucy to search your Wiki::Toolkit wiki.

SYNOPSIS

  my $search = Wiki::Toolkit::Search::Lucy->new( path => "/var/lucy/wiki" );
  my %wombat_nodes = $search->search_nodes( "wombat" );

Provides Lucy-based search methods for Wiki::Toolkit.

METHODS

new

  my $search = Wiki::Toolkit::Search::Lucy->new(
      path => "/var/lucy/wiki",
      metadata_fields => [ "category", "locale", "address" ],
      boost => { title => 2.5 },
      content_munger => sub {
                            my $content = shift;
                            $content =~ s/secretword//gs;
                            return $content;
                        },
      node_filter => sub {
                         my %args = @_;
                         return $args{content} =~ /REDIRECT/ ? 0 : 1;
                        },
  );

The path parameter is mandatory. path must be a directory for storing the indexed data. It should exist and be writeable.

The other four parameters are optional:

metadata_fields should be a reference to an array of metadata field names.

boost should be a reference to a hash in which the keys are fields and the values are numbers - see Lucy::Plan::FieldType for more info. Only title is currently supported as a field value.

content_munger should be a reference to a subroutine which takes the node content as a string and returns another string which will be indexed in place of the original content.

node_filter should be a reference to a subroutine which takes the named arguments node, content, and metadata and returns either true (yes, index this node) or false (no, don't index this node).

Content munging takes place BEFORE node filtering.

index_node

  $search->index_node( $node, $content, $metadata );

Indexes or reindexes the given node in the search engine indexes. You must supply both the node name and its content, but metadata is optional.

If you do supply metadata, it should be a reference to a hash where the keys are the names of the metadata fields and the values are either scalars or references to arrays of scalars. For example:

  $search->index_node( "Calthorpe Arms", "Nice pub in Bloomsbury.",
                       { category => [ "Pubs", "Bloomsbury" ],
                         postcode => "WC1X 8JR" } );

Only those metadata fields which were supplied to ->new will be taken notice of - others will be silently ignored.

If content_munger has been supplied to new as a subroutine reference, then $content will be run through this before indexing.

If node_filter has been supplied to new as a subroutine reference, then this will be used to check whether the node should be indexed or ignored.

Content munging takes place BEFORE node filtering.

search_nodes

  # Find all the nodes which contain the word 'expert'.
  my %results = $search->search_nodes( "expert" );

Returns a (possibly empty) hash whose keys are the node names and whose values are the scores.

Defaults to AND searches (if $and_or is not supplied, or is anything other than OR or or).

Searches are case-insensitive.

SEE ALSO

Wiki::Toolkit, Wiki::Toolkit::Search::Base.