summaryrefslogtreecommitdiff
path: root/lib/Travel/Status/DE/HAFAS.pm
blob: 26c68d63ab829019d652690ae8730aa4f05f66f9 (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
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
package Travel::Status::DE::HAFAS;

use strict;
use warnings;
use 5.010;
use utf8;

no if $] >= 5.018, warnings => "experimental::smartmatch";

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

our $VERSION = '1.05';

my %hafas_instance = (
	BVG => {
		url         => 'http://bvg.hafas.de/bin/stboard.exe',
		stopfinder  => 'http://bvg.hafas.de/bin/ajax-getstop.exe',
		name        => 'Berliner Verkehrsgesellschaft',
		productbits => [qw[s u tram bus ferry ice regio ondemand]],
	},
	DB => {
		url        => 'http://reiseauskunft.bahn.de/bin/bhftafel.exe',
		stopfinder => 'http://reiseauskunft.bahn.de/bin/ajax-getstop.exe',
		name       => 'Deutsche Bahn',
		productbits =>
		  [qw[ice ic_ec d regio s bus ferry u tram ondemand x x x x]],
	},
	NAHSH => {
		url         => 'http://nah.sh.hafas.de/bin/stboard.exe',
		stopfinder  => 'http://nah.sh.hafas.de/bin/ajax-getstop.exe',
		name        => 'Nahverkehrsverbund Schleswig-Holstein',
		productbits => [qw[ice ice ice regio s bus ferry u tram ondemand]],
	},
	NASA => {
		url         => 'http://reiseauskunft.insa.de/bin/stboard.exe',
		stopfinder  => 'http://reiseauskunft.insa.de/bin/ajax-getstop.exe',
		name        => 'Nahverkehrsservice Sachsen-Anhalt',
		productbits => [qw[ice ice regio regio regio tram bus ondemand]],
	},
	NVV => {
		url        => 'http://auskunft.nvv.de/auskunft/bin/jp/stboard.exe',
		stopfinder => 'http://auskunft.nvv.de/auskunft/bin/jp/ajax-getstop.exe',
		name       => 'Nordhessischer VerkehrsVerbund',
		productbits =>
		  [qw[ice ic_ec regio s u tram bus bus ferry ondemand regio regio]],
	},
	'ÖBB' => {
		url        => 'http://fahrplan.oebb.at/bin/stboard.exe',
		stopfinder => 'http://fahrplan.oebb.at/bin/ajax-getstop.exe',
		name       => 'Österreichische Bundesbahnen',
		productbits =>
		  [qw[ice ice ice regio regio s bus ferry u tram ice ondemand ice]],
	},
	RSAG => {
		url         => 'http://fahrplan.rsag-online.de/hafas/stboard.exe',
		stopfinder  => 'http://fahrplan.rsag-online.de/hafas/ajax-getstop.exe',
		name        => 'Rostocker Straßenbahn AG',
		productbits => [qw[ice ice ice regio s bus ferry u tram ondemand]],
	},
	SBB => {
		url        => 'http://fahrplan.sbb.ch/bin/stboard.exe',
		stopfinder => 'http://fahrplan.sbb.ch/bin/ajax-getstop.exe',
		name       => 'Schweizerische Bundesbahnen',
		productbits =>
		  [qw[ice ice regio regio ferry s bus cablecar regio tram]],
	},
	VBB => {
		url         => 'http://fahrinfo.vbb.de/bin/stboard.exe',
		stopfinder  => 'http://fahrinfo.vbb.de/bin/ajax-getstop.exe',
		name        => 'Verkehrsverbund Berlin-Brandenburg',
		productbits => [qw[s u tram bus ferry ice regio]],
	},
	VBN => {
		url         => 'https://fahrplaner.vbn.de/hafas/stboard.exe',
		stopfinder  => 'https://fahrplaner.vbn.de/hafas/ajax-getstop.exe',
		name        => 'Verkehrsverbund Bremen/Niedersachsen',
		productbits => [qw[ice ice regio regio s bus ferry u tram ondemand]],
	},
);

sub new {
	my ( $obj, %conf ) = @_;

	my $date = $conf{date} // strftime( '%d.%m.%Y', localtime(time) );
	my $time = $conf{time} // strftime( '%H:%M',    localtime(time) );
	my $lang = $conf{language} // 'd';
	my $mode = $conf{mode}     // 'dep';
	my $service = $conf{service};

	my %lwp_options = %{ $conf{lwp_options} // { timeout => 10 } };

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

	$ua->env_proxy;

	my $reply;

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

	if ( not defined $service and not defined $conf{url} ) {
		$service = 'DB';
	}

	if ( defined $service and not exists $hafas_instance{$service} ) {
		confess("The service '$service' is not supported");
	}

	my $ref = {
		active_service => $service,
		developer_mode => $conf{developer_mode},
		exclusive_mots => $conf{exclusive_mots},
		excluded_mots  => $conf{excluded_mots},
		station        => $conf{station},
		post           => {
			input => $conf{station},
			date  => $date,
			time  => $time,
			start => 'yes',         # value doesn't matter, just needs to be set
			boardType => $mode,
			L         => 'vs_java3',
		},
	};

	bless( $ref, $obj );

	$ref->set_productfilter;

	my $url = ( $conf{url} // $hafas_instance{$service}{url} ) . "/${lang}n";

	$reply = $ua->post( $url, $ref->{post} );

	if ( $reply->is_error ) {
		$ref->{errstr} = $reply->status_line;
		return $ref;
	}

	$ref->{raw_xml} = $reply->content;

	# the interface often does not return valid XML (but it's close!)
	if ( substr( $ref->{raw_xml}, 0, 5 ) ne '<?xml' ) {
		$ref->{raw_xml}
		  = '<?xml version="1.0" encoding="iso-8859-15"?><wrap>'
		  . $ref->{raw_xml}
		  . '</wrap>';
	}

	if ( defined $service and $service eq 'NVV' ) {

		# Returns invalid XML with tags inside HIMMessage's lead attribute.
		# Fix this.
		$ref->{raw_xml}
		  =~ s{ lead = " \K ( [^"]+ ) }{ $1 =~ s{ < [^>]+ > }{}grx }egx;
	}

	if ( $ref->{developer_mode} ) {
		say $ref->{raw_xml};
	}

	$ref->{tree} = XML::LibXML->load_xml(
		string => $ref->{raw_xml},
	);

	if ( $ref->{developer_mode} ) {
		say $ref->{tree}->toString(1);
	}

	$ref->check_input_error;
	return $ref;
}

sub set_productfilter {
	my ($self) = @_;

	my $service     = $self->{active_service};
	my $mot_default = '1';

	if ( not $service or not exists $hafas_instance{$service}{productbits} ) {
		return;
	}

	my %mot_pos;
	for my $i ( 0 .. $#{ $hafas_instance{$service}{productbits} } ) {
		$mot_pos{ $hafas_instance{$service}{productbits}[$i] } = $i;
	}

	if ( $self->{exclusive_mots} and @{ $self->{exclusive_mots} } ) {
		$mot_default = '0';
	}

	$self->{post}{productsFilter}
	  = $mot_default x ( scalar @{ $hafas_instance{$service}{productbits} } );

	if ( $self->{exclusive_mots} and @{ $self->{exclusive_mots} } ) {
		for my $mot ( @{ $self->{exclusive_mots} } ) {
			if ( exists $mot_pos{$mot} ) {
				substr( $self->{post}{productsFilter}, $mot_pos{$mot}, 1, '1' );
			}
		}
	}

	if ( $self->{excluded_mots} and @{ $self->{excluded_mots} } ) {
		for my $mot ( @{ $self->{excluded_mots} } ) {
			if ( exists $mot_pos{$mot} ) {
				substr( $self->{post}{productsFilter}, $mot_pos{$mot}, 1, '0' );
			}
		}
	}

}

sub check_input_error {
	my ($self) = @_;

	my $xp_err = XML::LibXML::XPathExpression->new('//Err');
	my $err    = ( $self->{tree}->findnodes($xp_err) )[0];

	if ($err) {
		$self->{errstr}
		  = $err->getAttribute('text')
		  . ' (code '
		  . $err->getAttribute('code') . ')';
		$self->{errcode} = $err->getAttribute('code');
	}

	return;
}

sub errcode {
	my ($self) = @_;

	return $self->{errcode};
}

sub errstr {
	my ($self) = @_;

	return $self->{errstr};
}

sub similar_stops {
	my ($self) = @_;

	my $service = $self->{active_service};

	if ( $service and exists $hafas_instance{$service}{stopfinder} ) {
		my $sf = Travel::Status::DE::HAFAS::StopFinder->new(
			url   => $hafas_instance{$service}{stopfinder},
			input => $self->{station},
		);
		if ( my $err = $sf->errstr ) {
			$self->{errstr} = $err;
			return;
		}
		return $sf->results;
	}
	return;
}

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

	my $xp_element = XML::LibXML::XPathExpression->new('//Journey');
	my $xp_msg     = XML::LibXML::XPathExpression->new('./HIMMessage');

	if ( defined $self->{results} ) {
		return @{ $self->{results} };
	}
	if ( not defined $self->{tree} ) {
		return;
	}

	$self->{results} = [];

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

		my @message_nodes = $tr->findnodes($xp_msg);
		my $train         = $tr->getAttribute('prod');
		my $time          = $tr->getAttribute('fpTime');
		my $date          = $tr->getAttribute('fpDate');
		my $dest          = $tr->getAttribute('targetLoc');
		my $platform      = $tr->getAttribute('platform');
		my $new_platform  = $tr->getAttribute('newpl');
		my $delay         = $tr->getAttribute('delay');
		my $e_delay       = $tr->getAttribute('e_delay');
		my $info          = $tr->getAttribute('delayReason');
		my $routeinfo     = $tr->textContent;
		my @messages;

		if ( not( $time and $dest ) ) {
			next;
		}

		for my $n (@message_nodes) {
			push( @messages, $n->getAttribute('header') );
		}

		substr( $date, 6, 0, '20' );

		$info      //= q{};
		$routeinfo //= q{};

		$train =~ s{#.*$}{};

		push(
			@{ $self->{results} },
			Travel::Status::DE::HAFAS::Result->new(
				date          => $date,
				raw_delay     => $delay,
				raw_e_delay   => $e_delay,
				messages      => \@messages,
				time          => $time,
				train         => $train,
				route_end     => $dest,
				platform      => $platform,
				new_platform  => $new_platform,
				info          => $info,
				routeinfo_raw => $routeinfo,
			)
		);
	}

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

# static
sub get_services {
	my @services;
	for my $service ( sort keys %hafas_instance ) {
		my %desc = %{ $hafas_instance{$service} };
		$desc{shortname} = $service;
		push( @services, \%desc );
	}
	return @services;
}

# static
sub get_service {
	my ($service) = @_;

	if ( defined $service and exists $hafas_instance{$service}) {
		return %{ $hafas_instance{$service} };
	}
	return;
}

sub get_active_service {
	my ($self) = @_;

	if (defined $self->{active_service}) {
		return %{ $hafas_instance{ $self->{active_service} } };
	}
	return;
}

1;

__END__

=head1 NAME

Travel::Status::DE::HAFAS - Interface to HAFAS-based online arrival/departure
monitors

=head1 SYNOPSIS

	use Travel::Status::DE::HAFAS;

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

	if (my $err = $status->errstr) {
		die("Request error: ${err}\n");
	}

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

=head1 VERSION

version 1.05

=head1 DESCRIPTION

Travel::Status::DE::HAFAS is an interface to HAFAS-based
arrival/departure monitors, for instance the one 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::HAFAS->new(I<%opts>)

Requests the departures/arrivals as specified by I<opts> and returns a new
Travel::Status::DE::HAFAS element with the results.  Dies if the wrong
I<opts> were passed.

Supported I<opts> are:

=over

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

The station or stop to report for, e.g.  "Essen HBf" or
"Alfredusbad, Essen (Ruhr)".  Mandatory.

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

Date to report for.  Defaults to the current day.

=item B<excluded_mots> => [I<mot1>, I<mot2>, ...]

By default, all modes of transport (trains, trams, buses etc.) are returned.
If this option is set, all modes appearing in I<mot1>, I<mot2>, ... will
be excluded. The supported modes depend on B<service>, use
B<get_services> or B<get_service> to get the supported values.

Note that this parameter does not work if the B<url> parameter is set.

=item B<exclusive_mots> => [I<mot1>, I<mot2>, ...]

If this option is set, only the modes of transport appearing in I<mot1>,
I<mot2>, ...  will be returned.  The supported modes depend on B<service>, use
B<get_services> or B<get_service> to get the supported values.

Note that this parameter does not work if the B<url> parameter is set.

=item B<language> => I<language>

Set language for additional information. Accepted arguments are B<d>eutsch,
B<e>nglish, B<i>talian and B<n> (dutch), depending on the used service.

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

Passed on to C<< LWP::UserAgent->new >>. Defaults to C<< { timeout => 10 } >>,
you can use an empty hashref to override it.

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

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

=item B<service> => I<service>

Request results from I<service>, defaults to "DB".
See B<get_services> (and C<< hafas-m --list >>) for a list of supported
services.

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

Time to report for.  Defaults to now.

=item B<url> => I<url>

Request results from I<url>, defaults to the one belonging to B<service>.

=back

=item $status->errcode

In case of an error in the HAFAS backend, returns the corresponding error code
as string. If no backend error occurred, returns undef.

=item $status->errstr

In case of an error in the HTTP request or HAFAS backend, returns a string
describing it.  If no error occurred, returns undef.

=item $status->results

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

If no matching results were found or the parser / http request failed, returns
undef.

=item $status->similar_stops

Returns a list of hashes describing stops whose name is similar to the one
requested in the constructor's B<station> parameter. Returns nothing if
the active service does not support this feature.
This is most useful if B<errcode> returns 'H730', which means that the
HAFAS backend could not identify the stop.

See Travel::Status::DE::HAFAS::StopFinder(3pm)'s B<results> method for details
on the return value.

=item $status->get_active_service

Returns a hash describing the active service when a service is active and
nothing otherwise. The hash contains the keys B<url> (URL to the station board
service), B<stopfinder> (URL to the stopfinder service, if supported), B<name>,
and B<productbits> (arrayref describing the supported modes of transport, may
contain duplicates).

=item Travel::Status::DE::HAFAS::get_services()

Returns an array containing all supported HAFAS services. Each element is a
hashref and contains all keys mentioned in B<get_active_service>.
It also contains a B<shortname> key, which is the service name used by
the constructor's B<service> parameter.

=item Travel::Status::DE::HAFAS::get_service(I<$service>)

Returns a hash describing the service I<$service>. Returns nothing
if I<$service> is not supported. See
B<get_active_service> for the hash layout.

=back

=head1 DIAGNOSTICS

None.

=head1 DEPENDENCIES

=over

=item * Class::Accessor(3pm)

=item * LWP::UserAgent(3pm)

=item * XML::LibXML(3pm)

=back

=head1 BUGS AND LIMITATIONS

Unknown.

=head1 SEE ALSO

Travel::Status::DE::HAFAS::Result(3pm), Travel::Status::DE::HAFAS::StopFinder(3pm).

=head1 AUTHOR

Copyright (C) 2015 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>

=head1 LICENSE

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