=head1 NAME

Kwiki::Backlinks - Maintain and display a simple database of links to the current page

=head1 DESCRIPTION

Kwiki::Backlinks uses the file system to keep track of which pages in 
a wiki link to which pages in the same wiki. That data is then used
to display on every page in the wiki. This is considered a nice
feature by some and an absolute requirement for enabling emergent 
understanding by others.

You can see Kwiki::Backlinks in action at L<http://www.burningchrome.com/wiki/>

This code also happens to demonstrate a novel use of Spoon hooks.

The backlinks database may also be used as a generic database of linking
activity in the wiki. L<Kwiki::Orphans> uses the database to reveal
pages which have no incoming links. The backlinks for any given page 
can be found the the following incantation:

    @backlinks = $self->hub->backlinks->get_backlinks_for_page($page->id);

This returns a list of page ids.

=head1 AUTHORS

Chris Dent, <cdent@burningchrome.com>
Ingy döt Net, <ingy@cpan.org>

=head1 CREDITS

Thanks to Ricardo SIGNES for the idea and patch for showing backlinks
on the edit page. Small price for very valuable gain.

=head1 SEE ALSO

L<Kwiki>
L<Spoon::Hooks>

=head1 COPYRIGHT AND LICENSE

Copyright (C) 2005, Chris Dent

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