#!/usr/bin/env perl
## Copyright © 2010 by Daniel Friesel <derf@finalrewind.org>
## License: WTFPL <http://sam.zoy.org/wtfpl>
##   0. You just DO WHAT THE FUCK YOU WANT TO.
use strict;
use warnings;
use 5.010;

use LWP::UserAgent;
use XML::LibXML;

my @now = localtime(time());
my $date = sprintf("%d.%d.%d", $now[3], $now[4] + 1 , $now[5] + 1900);
my $time = sprintf("%d:%d", $now[2], $now[1]);

my $post = {
	input => $ARGV[0],
	inputRef => '#',
	date => $date,
	time => $time,
	productsFilter => '1111101000000000',
	REQTrain_name => q{},
	maxJourneys => 20,
	delayedJourney => undef,
	start => 'Suchen',
	boardType => 'Abfahrt',
	ao => 'yes',
};

my $ua = LWP::UserAgent->new();
my $reply = $ua->post('http://mobile.bahn.de/bin/mobil/bhftafel.exe/dox?rt=1&use_realtime_filter=1', $post)->content();

my $tree = XML::LibXML->load_html(
	string => $reply,
	recover => 2,
	suppress_errors => 1,
	suppress_warnings => 1,
);

my $xp_element = XML::LibXML::XPathExpression->new('//div[@class="sqdetailsDep trow"]');
my $xp_late    = XML::LibXML::XPathExpression->new('./span[@class="red"]');
my $xp_on_time = XML::LibXML::XPathExpression->new('./span[@class="green bold"]');
my $xp_bold    = XML::LibXML::XPathExpression->new('.//span[@class="bold"]');
my $re_platform = qr{
	Gl\. \s (\d+) $
}msx;
my $re_dest = qr{
	>> \n ([^\n]+) \n
}msx;

for my $div (@{$tree->findnodes($xp_element)}) {

	my ($n_line, $n_time) = $div->findnodes($xp_bold);
	my ($n_late) = $div->findnodes($xp_late);
	my $text   = $div->textContent();

	my ($platform) = ($text =~ $re_platform);
	my ($destination) = ($text =~ $re_dest);
	my $line = $n_line->textContent();
	my $time = $n_time->textContent();

	my $late = (
		$n_late
		? $n_late->textContent()
		: q{}
	);

	$line =~ tr/ //s;

	printf(
		"%s  %-10s %-30s %-2d %s\n",
		$time,
		$line,
		$destination,
		$platform,
		$late
	);
}

__END__

=head1 NAME

=head1 SYNOPSIS

=head1 DESCRIPTION

=head1 OPTIONS

=head1 EXIT STATUS

=head1 CONFIGURATION

=head1 DEPENDENCIES

=head1 BUGS AND LIMITATIONS

=head1 AUTHOR

Copyright (C) 2010 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>

=head1 LICENSE

  0. You just DO WHAT THE FUCK YOU WANT TO.