NAME

Wiki::Toolkit::Plugin::JSON - A Wiki::Toolkit plugin to output RecentChanges JSON.

DESCRIPTION

This is an alternative access to the recent changes of a Wiki::Toolkit wiki. It outputs JSON.

SYNOPSIS

use Wiki::Toolkit;
use Wiki::Toolkit::Plugin::JSON;

my $wiki = Wiki::Toolkit->new( ... );  # See perldoc Wiki::Toolkit

# Set up the JSON feeder with the mandatory arguments - see
# C<new()> below for more, optional, arguments.
my $json = Wiki::Toolkit::Plugin::JSON->new(
  wiki                => $wiki,
  site_name           => 'My Wiki',
  site_url            => 'http://example.com/',
  make_node_url       => sub
                         {
                           my ($node_name, $version) = @_;
                           return 'http://example.com/?id=' . uri_escape($node_name) . ';version=' . uri_escape($version);
                         },
  recent_changes_link => 'http://example.com/?RecentChanges',
);

print "Content-type: application/xml\n\n";
print $json->recent_changes;

METHODS

new()

my $json = Wiki::Toolkit::Plugin::JSON->new(
  # Mandatory arguments:
  wiki                 => $wiki,
  site_name            => 'My Wiki',
  site_url             => 'http://example.com/',
  make_node_url        => sub
                          {
                            my ($node_name, $version) = @_;
                            return 'http://example.com/?id=' . uri_escape($node_name) . ';version=' . uri_escape($version);
                          },
  recent_changes_link  => 'http://example.com/?RecentChanges',

  # Optional arguments:
  site_description     => 'My wiki about my stuff',
  interwiki_identifier => 'MyWiki',
  make_diff_url        => sub
                          {
                            my $node_name = shift;
                            return 'http://example.com/?diff=' . uri_escape($node_name)
                          },
  make_history_url     => sub
                          {
                            my $node_name = shift;
                            return 'http://example.com/?hist=' . uri_escape($node_name)
                          },
);

wiki must be a Wiki::Toolkit object. make_node_url, and make_diff_url and make_history_url, if supplied, must be coderefs.

The mandatory arguments are:

• wiki

• site_name

• site_url

• make_node_url

• recent_changes_link

recent_changes()

  $wiki->write_node(
                     'About This Wiki',
                     'blah blah blah',
		                 $checksum,
              		   {
                       comment  => 'Stub page, please update!',
		                   username => 'Fred',
                     }
  );

  print "Content-type: application/xml\n\n";
  print $json->recent_changes;

  # Or get something other than the default of the latest 15 changes.
  print $json->recent_changes( items => 50 );
  print $json->recent_changes( days => 7 );

  # Or ignore minor edits.
  print $json->recent_changes( ignore_minor_edits => 1 );

  # Personalise your feed further - consider only changes
  # made by Fred to pages about bookshops.
  print $json->recent_changes(
             filter_on_metadata => {
                         username => 'Fred',
                         category => 'Bookshops',
                       },
              );

If using filter_on_metadata, note that only changes satisfying all criteria will be returned.

Note: Many 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:

comment - a brief comment summarising the edit that has just been made. Defaults to the empty string.

username - an identifier for the person who made the edit; will be used as the Dublin Core contributor for this item. Defaults to the empty string.

host - the hostname or IP address of the computer used to make the edit; if no username is supplied then this will be used as the Dublin Core contributor for this item. Defaults to the empty string.

major_change - true if the edit was a major edit and false if it was a minor edit; used for the importance of the item. Defaults to true (ie if major_change was not defined or was explicitly stored as undef).

rss_timestamp()

print $json->rss_timestamp();

Returns the timestamp of the 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 recent_changes(). 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://web.resource.org/rss/1.0/spec

• http://www.usemod.com/cgi-bin/mb.pl?ModWiki

MAINTAINER

Earle Martin <EMARTIN@cpan.org>. Originally by Kake Pugh <kake@earth.li>.

COPYRIGHT AND LICENSE

Copyright 2003-4 Kake Pugh. Subsequent modifications copyright 2005 Earle Martin.

Copyright 2008 the Wiki::Toolkit team

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

THANKS

The members of the Semantic Web Interest Group channel on irc.freenode.net, #swig, were very useful in the development of this module.