summaryrefslogtreecommitdiff
path: root/lib/WWW/Efa.pm
blob: 99c3181afa61b91fc2dd408f0f607049f4c835a4 (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
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
package WWW::Efa;

use strict;
use warnings;
use 5.010;

use Carp qw(confess);
use LWP::UserAgent;
use XML::LibXML;

our $VERSION = '1.3';

sub post_time {
	my ( $post, $conf ) = @_;

	my $time;

	if ( $conf->{depart} ) {
		$post->{itdTripDateTimeDepArr} = 'dep';
		$time = $conf->{depart} || $conf->{time};
	}
	else {
		$post->{itdTripDateTimeDepArr} = 'arr';
		$time = $conf->{arrive};
	}

	if ( $time !~ / ^ [0-2]? \d : [0-5]? \d $ /x ) {
		confess("time: must match HH:MM - '${time}'");
	}

	@{$post}{ 'itdTimeHour', 'itdTimeMinute' } = split( /:/, $time );

	return;
}

sub post_date {
	my ( $post, $date ) = @_;

	my ( $day, $month, $year ) = split( /[.]/, $date );

	if ( not defined $day or not length($day) or $day < 1 or $day > 31 ) {
		confess("date: invalid day, must match DD.MM[.[YYYY]] - '${date}'");
	}
	if ( not defined $month or not length($month) or $month < 1 or $month > 12 )
	{
		confess("date: invalid month, must match DD.MM[.[YYYY]] - '${date}'");
	}

	if ( not defined $year or not length($year) ) {
		$year = ( localtime(time) )[5] + 1900;
	}

	@{$post}{ 'itdDateDay', 'itdDateMonth', 'itdDateYear' }
	  = ( $day, $month, $year );

	return;
}

sub post_exclude {
	my ( $post, @exclude ) = @_;

	my @mapping = qw{
	  zug s-bahn u-bahn stadtbahn tram stadtbus regionalbus
	  schnellbus seilbahn schiff ast sonstige
	};

	foreach my $exclude_type (@exclude) {
		my $ok = 0;
		for my $map_id ( 0 .. $#mapping ) {
			if ( $exclude_type eq $mapping[$map_id] ) {
				$post->{"inclMOT_${map_id}"} = undef;
				$ok = 1;
			}
		}
		if ( not $ok ) {
			confess("exclude: Unsupported type '${exclude_type}'");
		}
	}

	return;
}

sub post_prefer {
	my ( $post, $prefer ) = @_;

	given ($prefer) {
		when ('speed')  { $post->{routeType} = 'LEASTTIME' }
		when ('nowait') { $post->{routeType} = 'LEASTINTERCHANGE' }
		when ('nowalk') { $post->{routeType} = 'LEASTWALKING' }
		default {
			confess("prefer: Must be speed/nowait/nowalk: '${prefer}'");
		}
	}

	return;
}

sub post_include {
	my ( $post, $include ) = @_;

	given ($include) {
		when ('local') { $post->{lineRestriction} = 403 }
		when ('ic')    { $post->{lineRestriction} = 401 }
		when ('ice')   { $post->{lineRestriction} = 400 }
		default {
			confess("include: Must be local/ic/ice: '${include}'");
		}
	}

	return;
}

sub post_walk_speed {
	my ( $post, $walk_speed ) = @_;

	if ( $walk_speed ~~ [ 'normal', 'fast', 'slow' ] ) {
		$post->{changeSpeed} = $walk_speed;
	}
	else {
		confess("walk_speed: Must be normal/fast/slow: '${walk_speed}'");
	}

	return;
}

sub post_place {
	my ( $post, $which, $place, $stop, $type ) = @_;

	if ( not( $place and $stop ) ) {
		confess('place: Need two elements');
	}

	$type //= 'stop';

	@{$post}{ "place_${which}", "name_${which}" } = ( $place, $stop );

	if ( $type ~~ [qw[address poi stop]] ) {
		$post->{"type_${which}"} = $type;
	}

	return;
}

sub create_post {
	my ($conf) = @_;
	my @now    = localtime( time() );
	my $post   = {
		changeSpeed                                        => 'normal',
		command                                            => q{},
		execInst                                           => q{},
		imparedOptionsActive                               => 1,
		inclMOT_0                                          => 'on',
		inclMOT_1                                          => 'on',
		inclMOT_10                                         => 'on',
		inclMOT_11                                         => 'on',
		inclMOT_2                                          => 'on',
		inclMOT_3                                          => 'on',
		inclMOT_4                                          => 'on',
		inclMOT_5                                          => 'on',
		inclMOT_6                                          => 'on',
		inclMOT_7                                          => 'on',
		inclMOT_8                                          => 'on',
		inclMOT_9                                          => 'on',
		includedMeans                                      => 'checkbox',
		itOptionsActive                                    => 1,
		itdDateDay                                         => $now[3],
		itdDateMonth                                       => $now[4] + 1,
		itdDateYear                                        => $now[5] + 1900,
		itdLPxx_ShowFare                                   => q{ },
		itdLPxx_command                                    => q{},
		itdLPxx_enableMobilityRestrictionOptionsWithButton => q{},
		itdLPxx_id_destination                             => ':destination',
		itdLPxx_id_origin                                  => ':origin',
		itdLPxx_id_via                                     => ':via',
		itdLPxx_mapState_destination                       => q{},
		itdLPxx_mapState_origin                            => q{},
		itdLPxx_mapState_via                               => q{},
		itdLPxx_mdvMap2_destination                        => q{},
		itdLPxx_mdvMap2_origin                             => q{},
		itdLPxx_mdvMap2_via                                => q{},
		itdLPxx_mdvMap_destination                         => q{::},
		itdLPxx_mdvMap_origin                              => q{::},
		itdLPxx_mdvMap_via                                 => q{::},
		itdLPxx_priceCalculator                            => q{},
		itdLPxx_transpCompany                              => 'vrr',
		itdLPxx_view                                       => q{},
		itdTimeHour                                        => $now[2],
		itdTimeMinute                                      => $now[1],
		itdTripDateTimeDepArr                              => 'dep',
		language                                           => 'de',
		lineRestriction                                    => 403,
		maxChanges                                         => 9,
		nameInfo_destination                               => 'invalid',
		nameInfo_origin                                    => 'invalid',
		nameInfo_via                                       => 'invalid',
		nameState_destination                              => 'empty',
		nameState_origin                                   => 'empty',
		nameState_via                                      => 'empty',
		name_destination                                   => q{},
		name_origin                                        => q{},
		name_via                                           => q{},
		placeInfo_destination                              => 'invalid',
		placeInfo_origin                                   => 'invalid',
		placeInfo_via                                      => 'invalid',
		placeState_destination                             => 'empty',
		placeState_origin                                  => 'empty',
		placeState_via                                     => 'empty',
		place_destination                                  => q{},
		place_origin                                       => q{},
		place_via                                          => q{},
		ptOptionsActive                                    => 1,
		requestID                                          => 0,
		routeType                                          => 'LEASTTIME',
		sessionID                                          => 0,
		text                                               => 1993,
		trITArrMOT                                         => 100,
		trITArrMOTvalue100                                 => 8,
		trITArrMOTvalue101                                 => 10,
		trITArrMOTvalue104                                 => 10,
		trITArrMOTvalue105                                 => 10,
		trITDepMOT                                         => 100,
		trITDepMOTvalue100                                 => 8,
		trITDepMOTvalue101                                 => 10,
		trITDepMOTvalue104                                 => 10,
		trITDepMOTvalue105                                 => 10,
		typeInfo_destination                               => 'invalid',
		typeInfo_origin                                    => 'invalid',
		typeInfo_via                                       => 'invalid',
		type_destination                                   => 'stop',
		type_origin                                        => 'stop',
		type_via                                           => 'stop',
		useRealtime                                        => 1
	};

	post_place( $post, 'origin',      @{ $conf->{from} } );
	post_place( $post, 'destination', @{ $conf->{to} } );

	if ( $conf->{via} ) {
		post_place( $post, 'via', @{ $conf->{via} } );
	}
	if ( $conf->{arrive} || $conf->{depart} ) {
		post_time( $post, $conf );
	}
	if ( $conf->{date} ) {
		post_date( $post, $conf->{date} );
	}
	if ( $conf->{exclude} ) {
		post_exclude( $post, @{ $conf->{exclude} } );
	}
	if ( $conf->{max_interchanges} ) {
		$post->{maxChanges} = $conf->{max_interchanges};
	}
	if ( $conf->{prefer} ) {
		post_prefer( $post, $conf->{prefer} );
	}
	if ( $conf->{proximity} ) {
		$post->{useProxFootSearch} = 1;
	}
	if ( $conf->{include} ) {
		post_include( $post, $conf->{include} );
	}
	if ( $conf->{walk_speed} ) {
		post_walk_speed( $post, $conf->{walk_speed} );
	}
	if ( $conf->{bike} ) {
		$post->{bikeTakeAlong} = 1;
	}

	return $post;
}

sub parse_initial {
	my ($tree) = @_;

	my $con_part = 0;
	my $con_no;
	my $cons = [];

	my $xp_td  = XML::LibXML::XPathExpression->new('//table//table/tr/td');
	my $xp_img = XML::LibXML::XPathExpression->new('./img');

	foreach my $td ( @{ $tree->findnodes($xp_td) } ) {

		my $colspan = $td->getAttribute('colspan') // 0;
		my $class   = $td->getAttribute('class')   // q{};

		if ( $colspan != 8 and $class !~ /^bgColor2?$/ ) {
			next;
		}

		if ( $colspan == 8 ) {
			if ( $td->textContent() =~ m{ (?<no> \d+ ) [.] .+ Fahrt }x ) {
				$con_no   = $+{no} - 1;
				$con_part = 0;
				next;
			}
		}

		if ( $class =~ /^bgColor2?$/ ) {
			if ( $class eq 'bgColor' and ( $con_part % 2 ) == 1 ) {
				$con_part++;
			}
			elsif ( $class eq 'bgColor2' and ( $con_part % 2 ) == 0 ) {
				$con_part++;
			}
		}

		if (    defined $con_no
			and not $td->exists($xp_img)
			and $td->textContent() !~ /^\s*$/ )
		{
			push( @{ $cons->[$con_no]->[$con_part] }, $td->textContent() );
		}
	}

	return $cons;
}

sub parse_pretty {
	my ($con_parts) = @_;

	my $elements;
	my @next_extra;

	for my $con ( @{$con_parts} ) {

		my $hash;

		# Note: Changes @{$con} elements
		foreach my $str ( @{$con} ) {
			$str =~ s/[\s\n\t]+/ /gs;
			$str =~ s/^ //;
			$str =~ s/ $//;
		}

		if ( @{$con} < 5 ) {
			@next_extra = @{$con};
			next;
		}

		# @extra may contain undef values
		foreach my $extra (@next_extra) {
			if ($extra) {
				push( @{ $hash->{extra} }, $extra );
			}
		}
		@next_extra = undef;

		if ( $con->[0] !~ / \d{2} : \d{2} /ox ) {
			splice( @{$con}, 0, 0, q{} );
			splice( @{$con}, 4, 0, q{} );
			$con->[7] = q{};
		}
		elsif ( $con->[4] =~ / Plan: \s ab /ox ) {
			push( @{ $hash->{extra} }, splice( @{$con}, 4, 1 ) );
		}

		foreach my $extra ( splice( @{$con}, 8, -1 ) ) {
			push( @{ $hash->{extra} }, $extra );
		}

		$hash->{dep_time} = $con->[0];

		# always "ab"           $con->[1];
		$hash->{dep_stop}   = $con->[2];
		$hash->{train_line} = $con->[3];
		$hash->{arr_time}   = $con->[4];

		# always "an"           $con->[5];
		$hash->{arr_stop}   = $con->[6];
		$hash->{train_dest} = $con->[7];

		push( @{$elements}, $hash );
	}

	return $elements;
}

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

	my $ref = {};

	$ref->{config} = \%conf;

	$ref->{post} = create_post( \%conf );

	return bless( $ref, $obj );
}

sub submit {
	my ( $self, %conf ) = @_;

	$conf{autocheck} = 1;

	$self->{ua} = LWP::UserAgent->new(%conf);

	my $response = $self->{ua}
	  ->post( 'http://efa.vrr.de/vrr/XSLT_TRIP_REQUEST2', $self->{post} );

	# XXX (workaround)
	# The content actually is iso-8859-1. But HTML::Message doesn't actually
	# decode character strings when they have that encoding. However, it
	# doesn't check for latin-1, which is an alias for iso-8859-1.

	$self->{html_reply} = $response->decoded_content( charset => 'latin-1' );

	return;
}

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

	my $tree = XML::LibXML->load_html( string => $self->{html_reply}, );

	my $raw_cons = parse_initial($tree);

	for my $raw_con ( @{$raw_cons} ) {
		push( @{ $self->{connections} }, parse_pretty($raw_con) );
	}
	$self->{tree} = $tree;

	$self->check_ambiguous();
	$self->check_no_connections();

	if ( @{$raw_cons} == 0 ) {
		confess('Got no data to parse');
	}

	return 1;
}

sub check_ambiguous {
	my ($self) = @_;
	my $tree = $self->{tree};

	my $xp_select = XML::LibXML::XPathExpression->new('//select');
	my $xp_option = XML::LibXML::XPathExpression->new('./option');

	foreach my $select ( @{ $tree->findnodes($xp_select) } ) {

		my $post_key = $select->getAttribute('name');
		my @possible;

		foreach my $val ( $select->findnodes($xp_option) ) {
			push( @possible, $val->textContent() );
		}
		my $err_text = join( q{, }, @possible );

		confess("Ambiguous input for '${post_key}': '${err_text}'");
	}

	return;
}

sub check_no_connections {
	my ($self) = @_;
	my $tree = $self->{tree};

	my $xp_err_img = XML::LibXML::XPathExpression->new(
		'//td/img[@src="images/ausrufezeichen.jpg"]');

	my $err_node = $tree->findnodes($xp_err_img)->[0];

	if ($err_node) {
		my $text = $err_node->parentNode()->parentNode()->textContent();
		confess("Got no connections: '${text}'");
	}

	return;
}

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

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

1;

__END__

=head1 NAME

WWW::Efa - inofficial interface to the efa.vrr.de German itinerary service

=head1 SYNOPSIS

	use WWW::Efa;

	my $efa = WWW::Efa->new(
		from => ['Essen', 'HBf'],
		to   => ['Duisburg', 'HBf'],
	);

	$efa->submit();
	$efa->parse();

	for my $con ($efa->connections()) {
		for my $c (@{$con}) {
			printf(
				"%-5s ab  %-30s %-20s %s\n%-5s an  %-30s\n\n",,
				@{$c}{'dep_time', 'dep_stop', 'train_line', 'train_dest'},
				@{$c}{'arr_time', 'arr_stop'},
			);
		}
		print "\n\n";
	}

=head1 VERSION

version 1.3

=head1 DESCRIPTION

B<WWW::Efa> is a client for the efa.vrr.de web interface.
You pass it the start/stop of your journey, maybe a time and a date and more
details, and it returns the up-to-date scheduled connections between those two
stops.

It uses B<LWP::USerAgent> and B<XML::LibXML> for this.

=head1 METHODS

=over

=item $efa = WWW::Efa->new(I<%conf>)

Returns a new WWW::Efa object and sets up its POST data via %conf.

Valid hash keys and their values are:

=over

=item B<from> => B<[> I<city>B<,> I<stop> [ B<,> I<type> ] B<]>

Mandatory.  Sets the origin, which is the start of the journey.
I<type> is optional and may be one of B<stop> (default), B<address> (street
and house number) or B<poi> ("point of interest").

=item B<to> => B<[> I<city>B<,> I<stop> [ B<,> I<type> ] B<]>

Mandatory.  Sets the destination, see B<from>.

=item B<via> => B<[> I<city>B<,> I<stop> [ B<,> I<type> ] B<]>

Optional.  Specifies a intermediate stop which the resulting itinerary must
contain.  See B<from> for arguments.

=item B<arrive> => I<HH:MM>

Sets the journey end time

=item B<depart> => I<HH:MM>

Sets the journey start time

=item B<date> => I<DD.MM.>[I<YYYY>]

Set journey date, in case it is not today

=item B<exclude> => \@exclude

Do not use certain transport types for itinerary.  Acceptep arguments:
zug, s-bahn, u-bahn, stadtbahn, tram, stadtbus, regionalbus, schnellbus,
seilbahn, schiff, ast, sonstige

=item B<max_interchanges> => I<num>

Set maximum number of interchanges

=item B<prefer> => B<speed>|B<nowait>|B<nowalk>

Prefer either fast connections (default), connections with low wait time or
connections with little distance to walk

=item B<proximity> => I<int>

Try using near stops instead of the given start/stop one if I<int> is true.

=item B<include> => B<local>|B<ic>|B<ice>

Include only local trains into itinarery (default), or all but ICEs, or all.

=item B<walk_speed> => B<slow>|B<fast>|B<normal>

Set walk speed.  Default: B<normal>

=item B<bike> => I<int>

If true: Prefer connections allowing to take a bike along

=back

=item $efa->submit(I<%opts>)

Submit the query to B<http://efa.vrr.de>.
I<%opts> is passed on to LWP::UserAgent->new(%opts).

=item $efa->parse()

Parse the B<efa.vrr.de> reply.
returns a true value on success.

=item $efa->connections()

Returns an array of connection elements. Each connection element is an
arrayref of connection part, and each connecton part is a hash containing the
following elements:

=over

=item * dep_time

Departure time as a string in HH:MM format

=item * dep_stop

Departure stop, e.g. "Essen HBf"

=item * train_line

Name of the train line, e.g. "S-Bahn S6"

=item * arr_time

Arrival time as a string in HH:MM format

=item * arr_stop

Arrival stop, e.g. "Berlin HBf"

=back

=back

=head1 DIAGNOSTICS

Dies with a backtrace when anything goes wrong.

=head1 DEPENDENCIES

=over

=item * LWP::UserAgent(3pm)

=item * XML::LibXML(3pm)

=back

=head1 BUGS AND LIMITATIONS

The parser is still somewhat fragile and has no proper error handling.

It is best not to pass Unicode characters to B<WWW::Efa>.

=head1 AUTHOR

Copyright (C) 2009-2011 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>

=head1 LICENSE

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