NAME

       OpenGuides::Search - Search form generation and processing for OpenGuides.

DESCRIPTION

       Does search stuff for OpenGuides.  Distributed and installed as part of the OpenGuides
       project, not intended for independent installation.  This documentation is probably only
       useful to OpenGuides developers.

SYNOPSIS

         use CGI;
         use OpenGuides::Config;
         use OpenGuides::Search;

         my $config = OpenGuides::Config->new( file => "wiki.conf" );
         my $search = OpenGuides::Search->new( config => $config );
         my %vars = CGI::Vars();
         $search->run( vars => \%vars );

METHODS

       new
             my $config = OpenGuides::Config->new( file => "wiki.conf" );
             my $search = OpenGuides::Search->new( config => $config );

       wiki
             my $wiki = $search->wiki;

           An accessor; returns the underlying Wiki::Toolkit object.

       config
             my $config = $search->config;

           An accessor; returns the underlying OpenGuides::Config object.

       run
             my %vars = CGI::Vars();
             $search->run(
                           vars           => \%vars,
                           return_output  => 1,   # defaults to 0
                           return_tt_vars => 1,  # defaults to 0
                         );

           The "return_output" parameter is optional.  If supplied and true, the stuff that would
           normally be printed to STDOUT will be returned as a string instead.

           The "return_tt_vars" parameter is also optional.  If supplied and true, the template
           is not processed and the variables that would have been passed to it are returned as a
           hash.  This parameter takes precedence over "return_output".

           These two parameters exist to make testing easier; you probably don't want to use them
           in production.

           You can also request just the raw search results:

             my %results = $search->run(
                                         os_x    => 528864,
                                         os_y    => 180797,
                                         os_dist => 750,
                                         format  => "raw",
                                       );

           Results are returned as a hash, keyed on the page name.  All results are returned, not
           just the first "page".  The values in the hash are hashes themselves, with the
           following key/value pairs:

           •   name

           •   wgs84_lat - WGS-84 latitude

           •   wgs84_long - WGS-84 longitude

           •   summary

           •   distance - distance (in metres) from origin, if origin exists

           •   score - relevance to search string, if search string exists; higher score means
               more relevance

           In case you're struggling to follow the code, it does the following: 1) Processes the
           parameters, and bails out if it hit a problem with them 2) If a search string was
           given, do a text search 3) If distance search paramaters were given, do a distance
           search 4) If no search has occured, print out the search form 5) If an error occured,
           bail out 6) If we got a single hit on a string search, redirect to it 7) If no results
           were found, give an empty search results page 8) Sort the results by either score or
           distance 9) Decide which results to show, based on paging 10) Display the appropriate
           page of the results

INPUT

       word
           a single word will be matched as-is. For example, a search on

             escalator

           will return all pages containing the word "escalator".

       AND searches
           A list of words with no punctuation will be ANDed, for example:

             restaurant vegetarian

           will return all pages containing both the word "restaurant" and the word "vegetarian".

       OR searches
           A list of words separated by commas (and optional spaces) will be ORed, for example:

             restaurant, cafe

           will return all pages containing either the word "restaurant" or the word "cafe".

       phrase searches
           Enclose phrases in double quotes, for example:

             "meat pie"

           will return all pages that contain the exact phrase "meat pie" - not pages that only
           contain, for example, "apple pie and meat sausage".

SEARCHING BY DISTANCE

       To perform a distance search, you need to supply one of the following sets of criteria to
       specify the distance to search within, and the origin (centre) of the search:

       os_dist, os_x, and os_y
           Only works if you chose to use British National Grid in wiki.conf

       osie_dist, osie_x, and osie_y
           Only works if you chose to use Irish National Grid in wiki.conf

       latlong_dist, latitude, and longitude
           Should always work, but has a habit of "finding" things a couple of metres away from
           themselves.

       You can perform both pure distance searches and distance searches in combination with text
       searches.

OUTPUT

       Results will be put into some form of relevance ordering.  These are the rules we have
       tests for so far (and hence the only rules that can be relied on):

       •   A match on page title will score higher than a match on page category or locale.

       •   A match on page category or locale will score higher than a match on page content.

       •   Two matches in the title beats one match in the title and one in the content.

AUTHOR

       The OpenGuides Project (openguides-dev@lists.openguides.org)

COPYRIGHT

            Copyright (C) 2003-2013 The OpenGuides Project.  All Rights Reserved.

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

SEE ALSO

       OpenGuides