summaryrefslogtreecommitdiff
path: root/lib/Travel/Status/DE/DeutscheBahn.pm
blob: 12450b24504bff7dab93a3c5538df97d792e8642 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
package Travel::Status::DE::DeutscheBahn;

use strict;
use warnings;
use 5.010;

use Carp qw(confess);
use LWP::UserAgent;
use POSIX qw(strftime);
use Travel::Status::DE::DeutscheBahn::Result;
use XML::LibXML;

our $VERSION = '0.01';

sub new {
	my ( $obj, %conf ) = @_;
	my $date = strftime( '%d.%m.%Y', localtime(time) );
	my $time = strftime( '%H:%M',    localtime(time) );

	my $ua = LWP::UserAgent->new();

	my $reply;

	if ( not $conf{station} ) {
		confess('You need to specify a station');
	}

	my $ref = {
		mot_filter => [
			$conf{mot}->{ice}   // 1,
			$conf{mot}->{ic_ec} // 1,
			$conf{mot}->{d}     // 1,
			$conf{mot}->{nv}    // 1,
			$conf{mot}->{s}     // 1,
			$conf{mot}->{bus}   // 0,
			$conf{mot}->{ferry} // 0,
			$conf{mot}->{u}     // 0,
			$conf{mot}->{tram}  // 0,
		],
		post => {
			advancedProductMode => q{},
			input               => $conf{station},
			date                => $conf{date} || $date,
			time                => $conf{time} || $time,
			REQTrain_name       => q{},
			start               => 'Suchen',
			boardType           => $conf{mode} // 'dep',
		},
	};

	for my $i ( 0 .. @{ $ref->{mot_filter} } ) {
		if ( $ref->{mot_filter}->[$i] ) {
			$ref->{post}->{"GUIREQProduct_$i"} = 'on';
		}
	}

	$reply = $ua->post( 'http://reiseauskunft.bahn.de/bin/bhftafel.exe/dn?rt=1',
		$ref->{post} );

	if ( $reply->is_error ) {
		my $errstr = $reply->status_line();
		confess("Could not submit POST request: ${errstr}");
	}

	$ref->{html} = $reply->content();

	$ref->{tree} = XML::LibXML->load_html(
		string            => $ref->{html},
		recover           => 2,
		suppress_errors   => 1,
		suppress_warnings => 1,
	);

	return bless( $ref, $obj );
}

sub new_from_html {
	my ( $obj, $html ) = @_;

	my $ref = { html => $html, };

	$ref->{tree} = XML::LibXML->load_html(
		string            => $ref->{html},
		recover           => 2,
		suppress_errors   => 1,
		suppress_warnings => 1,
	);

	return bless( $ref, $obj );
}

sub results {
	my ($self) = @_;
	my $mode = $self->{post}->{boardType};

	my $xp_element = XML::LibXML::XPathExpression->new(
		"//table[\@class=\"result stboard ${mode}\"]/tr");
	my $xp_time  = XML::LibXML::XPathExpression->new('./td[@class="time"]');
	my $xp_train = XML::LibXML::XPathExpression->new('./td[@class="train"]');
	my $xp_route = XML::LibXML::XPathExpression->new('./td[@class="route"]');
	my $xp_dest  = XML::LibXML::XPathExpression->new('./td[@class="route"]//a');
	my $xp_platform
	  = XML::LibXML::XPathExpression->new('./td[@class="platform"]');
	my $xp_info = XML::LibXML::XPathExpression->new('./td[@class="ris"]');

	my $re_via = qr{
		^ \s* (.+?) \s* \n
		\d{1,2}:\d{1,2}
	}mx;

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

		my ($n_time) = $tr->findnodes($xp_time);
		my ( undef, $n_train ) = $tr->findnodes($xp_train);
		my ($n_route)    = $tr->findnodes($xp_route);
		my ($n_dest)     = $tr->findnodes($xp_dest);
		my ($n_platform) = $tr->findnodes($xp_platform);
		my ($n_info)     = $tr->findnodes($xp_info);
		my $first        = 1;

		if ( not( $n_time and $n_dest ) ) {
			next;
		}

		my $time     = $n_time->textContent();
		my $train    = $n_train->textContent();
		my $route    = $n_route->textContent();
		my $dest     = $n_dest->textContent();
		my $platform = $n_platform->textContent();
		my $info     = $n_info ? $n_info->textContent() : q{};
		my @via;

		for my $str ( $time, $train, $dest, $platform, $info ) {
			$str =~ s/\n/ /mg;
			$str =~ tr/ //s;
		}

		$info =~ s/,Grund//;

		while ( $route =~ m{$re_via}g ) {
			if ($first) {
				$first = 0;
				next;
			}
			my $stop = $1;
			push( @via, $stop );
		}

		push(
			@{ $self->{results} },
			Travel::Status::DE::DeutscheBahn::Result->new(
				time      => $time,
				train     => $train,
				route_raw => $route,
				route     => \@via,
				route_end => $dest,
				platform  => $platform,
				info      => $info,
			)
		);
	}

	return @{ $self->{results} };
}

1;

__END__

=head1 NAME

Travel::Status::DE::DeutscheBahn - Interface to the DeutscheBahn online
arrival/departure monitor

=head1 SYNOPSIS

	use Travel::Status::DE::DeutscheBahn;

	my $status = Travel::Status::DE::DeutscheBahn->new(
		station => 'Essen Hbf',
	);

	for my $departure ($status->results) {
		printf(
			"At %s: %s to %s from platform %s\n",
			$departure->time,
			$departure->train,
			$departure->destination,
			$departure->platform,
		);
	}

=head1 VERSION

version 0.01

=head1 DESCRIPTION

Travel::Status::DE::DeutscheBahn is an interface to the DeutscheBahn
arrival/departure monitor available at
L<http://reiseauskunft.bahn.de/bin/bhftafel.exe/dn>.

It takes a station name and (optional) date and time and reports all arrivals
or departures at that station starting at the specified point in time (now if
unspecified).

=head1 METHODS

=over

=item my $status = Travel::Status::DE::DeutscheBahn->new(I<%opts>)

Returns a new Travel::Status::DE::DeutscheBahn element.  Supported I<opts> are:

=over

=item B<station> => I<station>

The train station to report for, e.g.  "Essen HBf".  Mandatory.

=item B<date> => I<dd>.I<mm>.I<yyyy>

Date to report for.  Defaults to the current day.

=item B<time> => I<hh>:I<mm>

Time to report for.  Defaults to now.

=item B<mode> => B<arr>|B<dep>

By default, Travel::Status::DE::DeutscheBahn reports train departures
(B<dep>).  Set this to B<arr> to get arrivals instead.

=item B<mot> => I<\%hashref>

Modes of transport to show.  Accepted keys are: B<ice> (ICE trains), B<ic_ec>
(IC and EC trains), B<d> (InterRegio and similarly fast trains), B<nv>
("Nahverkehr", mostly RegionalExpress trains), B<s> ("S-Bahn"), B<bus>,
B<ferry>, B<u> ("U-Bahn") and B<tram>.

Setting a mode (as hash key) to 1 includes it, 0 excludes it.  undef leaves it
at the default.

By default, the following are shown: ice, ic_ec, d, nv, s.

=back

=item $status->results()

Returns a list of arrivals/departures.  Each list element is a
Travel::Status::DE::DeutscheBahn::Result(3pm) object.

=back

=head1 DIAGNOSTICS

None.

=head1 DEPENDENCIES

=over

=item * Class::Accessor(3pm)

=item * LWP::UserAgent(3pm)

=item * XML::LibXML(3pm)

=back

=head1 BUGS AND LIMITATIONS

In the web interface, a train's route contains station names and the
corresponding arrival times.  These times are not yet accessible.

=head1 SEE ALSO

Travel::Status::DE::DeutscheBahn::Result(3pm).

=head1 AUTHOR

Copyright (C) 2011 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>

=head1 LICENSE

This module is licensed under the same terms as Perl itself.