NAME

       OpenGuides::JSON - An OpenGuides plugin to output JSON.

DESCRIPTION

       Does all the JSON 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 Wiki::Toolkit;
           use OpenGuides::Config;
           use OpenGuides::JSON;

           my $wiki = Wiki::Toolkit->new( ... );
           my $config = OpenGuides::Config->new( file => "wiki.conf" );
           my $json_writer = OpenGuides::JSON->new( wiki   => $wiki,
                                                config => $config );

           # JSON version of a node.
           print "Content-Type: application/javascript\n\n";
           print $json_writer->emit_json( node => "Masala Zone, N1 0NU" );

           # Ten most recent changes.
           print "Content-Type: application/javascript\n";
           print "Last-Modified: " . $self->json_timestamp( items => 10 ) . "\n\n";
           print $json_writer->make_recentchanges_json( items => 10 );

METHODS

       new
               my $json_writer = OpenGuides::JSON->new( wiki   => $wiki,
                                                      config => $config );

           "wiki" must be a Wiki::Toolkit object and "config" must be an OpenGuides::Config
           object.  Both arguments mandatory.

       emit_json
               $wiki->write_node( "Masala Zone, N1 0NU",
                                "Quick and tasty Indian food",
                                $checksum,
                                { comment  => "New page",
                                  username => "Kake",
                                  locale   => "Islington" }
               );

               print "Content-Type: application/javascript\n\n";
               print $json_writer->emit_json( node => "Masala Zone, N1 0NU" );

           Note: Some of the fields emitted by the JSON generator are taken from the node
           metadata. The form of this metadata is not mandated by Wiki::Toolkit. Your wiki
           application should make sure to store some or all of the following metadata when
           calling "write_node":

           postcode - The postcode or zip code of the place discussed by the node.  Defaults to
           the empty string.
           city - The name of the city that the node is in.  If not supplied, then the value of
           "default_city" in the config object supplied to "new", if available, otherwise the
           empty string.
           country - The name of the country that the node is in.  If not supplied, then the
           value of "default_country" in the config object supplied to "new" will be used, if
           available, otherwise the empty string.
           username - An identifier for the person who made the latest edit to the node.  This
           person will be listed as a contributor (Dublin Core).  Defaults to empty string.
           locale - The value of this can be a scalar or an arrayref, since some places have a
           plausible claim to being in more than one locale.  Each of these is put in as a
           "Neighbourhood" attribute.
           phone - Only one number supported at the moment.  No validation.
           website - No validation.
           opening_hours_text - A freeform text field.
       json_maker
           Returns a raw Wiki::Toolkit::Plugin::JSON object created with the values you invoked
           this module with.

       make_prefs_json
               my $json_writer = OpenGuides::JSON->new( wiki   => $wiki,
                                                        config => $config );
               print $json_writer->make_prefs_json();

           Retrieves the preferences from any stored preferences cookie, supplies defaults for
           any preferences not set, returns the result as JSON.

       make_recentchanges_json
               # Ten most recent changes.
               print "Content-Type: application/javascript\n";
               print "Last-Modified: " . $json_writer->json_timestamp( items => 10 ) . "\n\n";
               print $json_writer->make_recentchanges_json( items => 10 );

               # All the changes made by bob in the past week, ignoring minor edits.

               my %args = (
                            days               => 7,
                            ignore_minor_edits => 1,
                            filter_on_metadata => { username => "bob" },
                          );

               print "Content-Type: application/javascript\n";
               print "Last-Modified: " . $json_writer->json_timestamp( %args ) . "\n\n";
               print $json_writer->make_recentchanges_json( %args );

       json_timestamp
               print "Last-Modified: " . $json_writer->json_timestamp( %args ) . "\n\n";

           Returns the timestamp of the RSS feed in POSIX::strftime style ("Tue, 29 Feb 2000
           12:34:56 GMT"), which is equivalent to the timestamp of the most recent item in the
           feed. Takes the same arguments as make_recentchanges_json(). You will most likely need
           this to print a Last-Modified HTTP header so user-agents can determine whether they
           need to reload the feed or not.

SEE ALSO

       •   Wiki::Toolkit

       •   <http://openguides.org/>

       •   <http://chefmoz.org/>

AUTHOR

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

COPYRIGHT

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

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

CREDITS

       Code in this module is mostly pirated from OpenGuides::RDF, those authors deserve all the
       credit. Chris Prather did the pirating.