#!/usr/bin/perl -w
# Blosxom Plugin: subcategories
# Version: 0.1
# Provides a list of subcategories of the current category
# Author: Stefan Bodewig <stefan.bodewig@freenet.de>
# Blosxom Home/Docs/Licensing: http://www.blosxom.com
# subcategories Home/Docs/Licensing:
#               http://stefan.samaflost.de/code/blosxom/subcategories

package subcategories;

# --- Configurable Variables ---

# ------------------------------

$subcategories = '';

sub start {
    return 1;
}

sub filter {
    my ($pkg, $files) = @_;
    my %subcats;
    
    #filter out posts outside of requested path
    my $currentdir = $blosxom::path_info;
    if ($currentdir =~ /(.*?)([^\/]+)\.(.+)$/ and $2 ne 'index') {
      # direct file access, ignore
      return 1;
    } else { 
      $currentdir =~ s!/index\..+$!!;
    }
    $currentdir eq "" or $currentdir =~ m!.*/$! or $currentdir .= "/";
    foreach my $path_file (keys %{$files}) {
        my ($path,$fn) = $path_file =~ m!^$blosxom::datadir/(?:(.*)/)?(.*)\.$blosxom::file_extension!;
        # Only stories in the right hierarchy
        $path =~ /^$currentdir/ or next;
        if ($path =~ m!^$currentdir([^\/]+)!) {
          $subcats{$1}{'count'}++;
          $subcats{$1}{'path'} = $currentdir . $1;
        }
    }

    scalar(%subcats) or return 1;

    my $results = qq{<ul class="subcategories">};

    foreach my $cat(sort {$a cmp $b} keys(%subcats)) {
      $results .= qq{<li class="subcategory"><a href="$blosxom::url/$subcats{$cat}{'path'}/index.$blosxom::flavour">};
      $results .= qq{$cat</a>};
      $results .= qq{ ($subcats{$cat}{'count'})</li>};
    }


    $results .= "</ul>";
        
    $subcategories = $results;
}

1;

__END__

=head1 NAME

Blosxom Plug-in: subcategories

=head1 SYNOPSIS

Include $subcategories::subcategories in your templates to get an
ordered list of subcategories (of the current category) in which you
have posts.

=head1 subcategories

Copyright (c) 2005, Stefan Bodewig
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above
      copyright notice, this list of conditions and the following
      disclaimer in the documentation and/or other materials provided
      with the distribution.

    * The name Stefan Bodewig must not be used to endorse or
      promote products derived from this software without specific
      prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.