# Blosxom Plugin: prunesort
# Author: Simon Fraser
# Version: 0.1
# Documentation: prunesort is a hack that allows for some depth control when using
#                blosxom in static mode. Use it in collaboration with
#                bottomupconfig, setting $prunesort::localdepth in your config
#                files.
#

package prunesort;

$localdepth = 0;

sub start {
  # we only make sense in static mode
  return $blosxom::static_or_dynamic eq 'dynamic' ? 0 : 1;
}

sub sort
{
  return sub
  {
    my($files_ref) = @_;

    my $archive_load;
    if ($blosxom::static_or_dynamic eq 'dynamic') {
      $archive_load = ($blosxom::path_info_yr ne "")
    } else {
      $archive_load = ($blosxom::path_info =~ m/^[\/\d]+$/);
    }

    if ($localdepth ne 0 and !$archive_load)
    {
      @files_list = sort keys %$files_ref;
  
      my $myroot = $blosxom::datadir ."/" . $blosxom::path_info;
      
      if ($blosxom::debug)
      {
        printf $blosxom::debug_file "Prunesort root: $myroot (path_info $blosxom::path_info)\n";
      }
      
      $myroot =~ s/\/$//;
      $myroot =~ s/\/[^\/]+\.[^\/]+$//;

      foreach (@files_list)
      {
        if ($_ !~ /$myroot([^\/]*\/[^\/]*){0,$localdepth}$/)
        {
          delete $files_ref->{$_};
        }
      }
    }

    # default sort the remainder
    return sort { $files_ref->{$b} <=> $files_ref->{$a} } keys %$files_ref;
  };
}

1;