# /yer/perl/here

###############################################################################
#
# opml2ft v0.1
# Copyright (c) 2000 Aaron Straup Cope <aaron@aaronland.net>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
###############################################################################

use strict;

use XML::Parser;

my $infile;
my $outfile;

my $body;
my $outline;

my $count = 0;
my $last  = -1;

{
    &main;
    exit;
}

sub main {
    $infile  = $ARGV[0];
    $outfile = $ARGV[1];

    die "'$infile' does not exist.\n" if (! -e $infile);

    open TREE, ">$outfile" || die "Failed to open '$outfile' for writing.\n";
    &convert;
    
    close TREE;
    return 1;
}

sub convert {
    my $xml = new XML::Parser;
    $xml->setHandlers( Start => \&start, End => \&end );
    $xml->parsefile($infile);

    return 1;
}

sub start {
  my $parser = shift;
  my $el     = shift;
  my $attrs  = { @_ };

  $body ||= ($el =~ /^(body)$/);
  return unless $body;

  if (! $outline->{'text'}) {
      $outline = $attrs;
      return 1;
  }

  my $spc; map { $spc .= " "; } (0..$last);
  print "$spc$outline->{'text'}\n";

  my $root   = ($last < 0) ? 1 : 0;
  my $parent = $last - 1;

  if ($root) {
      print TREE "foldersTree = gFld(\"$outline->{'text'}\",\"\")\n";
  }

  else {

      my $aux   = join("","aux",$count);
      my $p_aux = ($parent < 0) ? "foldersTree" : join("","aux",$last);

      if ($last < $count) {
	  print TREE $spc,"$aux = insFld($p_aux, gFld(\"$outline->{'text'}\", \"$outline->{'url'}\"))\n";
      } else {
	  print TREE $spc,"insDoc($p_aux, gLnk($count,\"$outline->{'text'}\", \"$outline->{'url'}\"))\n";
      }
  }

  $outline = $attrs;
  $last    = $count;

  $count++;
  return 1;
}

sub end {
  my $parser = shift;
  my $el     = shift;

  return unless $body;

  $count--;
  return 1;
}