summaryrefslogtreecommitdiff
path: root/lib/Travel/Status/DE/VRR.pm
blob: f0b2d155599d99073f67861df750b39a32e9a616 (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
package Travel::Status::DE::VRR;

use strict;
use warnings;
use 5.010;

our $VERSION = '1.00';

use Carp qw(confess cluck);
use Encode qw(encode decode);
use Travel::Status::DE::VRR::Line;
use Travel::Status::DE::VRR::Result;
use LWP::UserAgent;
use XML::LibXML;

sub new {
	my ( $class, %opt ) = @_;

	my $ua  = LWP::UserAgent->new(%opt);
	my @now = localtime( time() );

	my @time = @now[ 2, 1 ];
	my @date = ( $now[3], $now[4] + 1, $now[5] + 1900 );

	if ( not( $opt{place} and $opt{name} ) ) {
		confess('You need to specify a place and a name');
	}
	if ( $opt{type} and not( $opt{type} ~~ [qw[stop address poi]] ) ) {
		confess('type must be stop, address or poi');
	}

	## no critic (RegularExpressions::ProhibitUnusedCapture)
	## no critic (Variables::ProhibitPunctuationVars)

	if (    $opt{time}
		and $opt{time} =~ m{ ^ (?<hour> \d\d? ) : (?<minute> \d\d ) $ }x )
	{
		@time = @+{qw{hour minute}};
	}
	elsif ( $opt{time} ) {
		confess('Invalid time specified');
	}

	if (
		    $opt{date}
		and $opt{date} =~ m{ ^ (?<day> \d\d? ) [.] (?<month> \d\d? ) [.]
			(?<year> \d{4} )? $ }x
	  )
	{
		if ( $+{year} ) {
			@date = @+{qw{day month year}};
		}
		else {
			@date[ 0, 1 ] = @+{qw{day month}};
		}
	}
	elsif ( $opt{date} ) {
		confess('Invalid date specified');
	}

	my $self = {
		post => {
			command                => q{},
			deleteAssignedStops_dm => '1',
			help                   => 'Hilfe',
			itdDateDay             => $date[0],
			itdDateMonth           => $date[1],
			itdDateYear            => $date[2],
			itdLPxx_id_dm          => ':dm',
			itdLPxx_mapState_dm    => q{},
			itdLPxx_mdvMap2_dm     => q{},
			itdLPxx_mdvMap_dm      => '3406199:401077:NAV3',
			itdLPxx_transpCompany  => 'vrr',
			itdLPxx_view           => q{},
			itdTimeHour            => $time[0],
			itdTimeMinute          => $time[1],
			language               => 'de',
			mode                   => 'direct',
			nameInfo_dm            => 'invalid',
			nameState_dm           => 'empty',
			name_dm                => $opt{name},
			outputFormat           => 'XML',
			placeInfo_dm           => 'invalid',
			placeState_dm          => 'empty',
			place_dm               => $opt{place},
			ptOptionsActive        => '1',
			requestID              => '0',
			reset                  => 'neue Anfrage',
			sessionID              => '0',
			submitButton           => 'anfordern',
			typeInfo_dm            => 'invalid',
			type_dm                => $opt{type} // 'stop',
			useProxFootSearch      => '0',
			useRealtime            => '1',
		},
	};

	bless( $self, $class );

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

	if ( $response->is_error ) {
		$self->{errstr} = $response->status_line;
		return $self;
	}

	$self->{xml} = $response->decoded_content;

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

	$self->check_for_ambiguous();

	return $self;
}

sub new_from_xml {
	my ( $class, %opt ) = @_;

	my $self = { xml => $opt{xml}, };

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

	return bless( $self, $class );
}

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

	return $self->{errstr};
}

sub sprintf_date {
	my ($e) = @_;

	return sprintf( '%02d.%02d.%d',
		$e->getAttribute('day'),
		$e->getAttribute('month'),
		$e->getAttribute('year'),
	);
}

sub sprintf_time {
	my ($e) = @_;

	return sprintf( '%02d:%02d',
		$e->getAttribute('hour'),
		$e->getAttribute('minute'),
	);
}

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

	my $xml = $self->{tree};

	my $xp_place = XML::LibXML::XPathExpression->new('//itdOdv/itdOdvPlace');
	my $xp_name  = XML::LibXML::XPathExpression->new('//itdOdv/itdOdvName');
	my $xp_mesg
	  = XML::LibXML::XPathExpression->new('//itdMessage[@type="error"]');

	my $xp_place_elem = XML::LibXML::XPathExpression->new('./odvPlaceElem');
	my $xp_name_elem  = XML::LibXML::XPathExpression->new('./odvNameElem');

	my $e_place = ( $xml->findnodes($xp_place) )[0];
	my $e_name  = ( $xml->findnodes($xp_name) )[0];
	my @e_mesg  = $xml->findnodes($xp_mesg);

	if ( not( $e_place and $e_name ) ) {

		# this should not happen[tm]
		cluck('skipping ambiguity check- itdOdvPlace/itdOdvName missing');
		return;
	}

	my $s_place = $e_place->getAttribute('state');
	my $s_name  = $e_name->getAttribute('state');

	if ( $s_place eq 'list' ) {
		$self->{errstr} = sprintf(
			'Ambiguous place input: %s',
			join( q{ | },
				map { decode( 'UTF-8', $_->textContent ) }
				  @{ $e_place->findnodes($xp_place_elem) } )
		);
		return;
	}
	if ( $s_name eq 'list' ) {
		$self->{errstr} = sprintf(
			'Ambiguous name input: %s',
			join( q{ | },
				map { decode( 'UTF-8', $_->textContent ) }
				  @{ $e_name->findnodes($xp_name_elem) } )
		);
		return;
	}
	if ( $s_place eq 'notidentified' ) {
		$self->{errstr} = 'invalid place parameter';
		return;
	}
	if ( $s_name eq 'notidentified' ) {
		$self->{errstr} = 'invalid name parameter';
		return;
	}
	if (@e_mesg) {
		$self->{errstr} = join( q{; }, map { $_->textContent } @e_mesg );
		return;
	}

	return;
}

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

	my $xp_element
	  = XML::LibXML::XPathExpression->new('//itdServingLines/itdServingLine');

	my $xp_info  = XML::LibXML::XPathExpression->new('./itdNoTrain');
	my $xp_route = XML::LibXML::XPathExpression->new('./itdRouteDescText');
	my $xp_oper  = XML::LibXML::XPathExpression->new('./itdOperator/name');

	if ( $self->{lines} ) {
		return @{ $self->{lines} };
	}

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

		my $e_info  = ( $e->findnodes($xp_info) )[0];
		my $e_route = ( $e->findnodes($xp_route) )[0];
		my $e_oper  = ( $e->findnodes($xp_oper) )[0];

		if ( not( $e_info and $e_oper ) ) {
			cluck( 'node with insufficient data. This should not happen. '
				  . $e->getAttribute('number') );
			next;
		}

		my $line       = $e->getAttribute('number');
		my $direction  = $e->getAttribute('direction');
		my $valid      = $e->getAttribute('valid');
		my $type       = $e_info->getAttribute('name');
		my $route      = ( $e_route ? $e_route->textContent : undef );
		my $operator   = $e_oper->textContent;
		my $identifier = $e->getAttribute('stateless');

		push(
			@lines,
			Travel::Status::DE::VRR::Line->new(
				name       => $line,
				direction  => decode( 'UTF-8', $direction ),
				valid      => $valid,
				type       => decode( 'UTF-8', $type ),
				route      => decode( 'UTF-8', $route ),
				operator   => decode( 'UTF-8', $operator ),
				identifier => $identifier,
			)
		);
	}

	$self->{lines} = \@lines;

	return @lines;
}

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

	my $xp_element = XML::LibXML::XPathExpression->new('//itdDeparture');

	my $xp_date  = XML::LibXML::XPathExpression->new('./itdDateTime/itdDate');
	my $xp_time  = XML::LibXML::XPathExpression->new('./itdDateTime/itdTime');
	my $xp_rdate = XML::LibXML::XPathExpression->new('./itdRTDateTime/itdDate');
	my $xp_rtime = XML::LibXML::XPathExpression->new('./itdRTDateTime/itdTime');
	my $xp_line  = XML::LibXML::XPathExpression->new('./itdServingLine');
	my $xp_info
	  = XML::LibXML::XPathExpression->new('./itdServingLine/itdNoTrain');

	if ( $self->{results} ) {
		return @{ $self->{results} };
	}

	$self->lines;

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

		my $e_date = ( $e->findnodes($xp_date) )[0];
		my $e_time = ( $e->findnodes($xp_time) )[0];
		my $e_line = ( $e->findnodes($xp_line) )[0];
		my $e_info = ( $e->findnodes($xp_info) )[0];

		my $e_rdate = ( $e->findnodes($xp_rdate) )[0];
		my $e_rtime = ( $e->findnodes($xp_rtime) )[0];

		if ( not( $e_date and $e_time and $e_line ) ) {
			cluck('node with insufficient data. This should not happen');
			next;
		}

		my $date = sprintf_date($e_date);
		my $time = sprintf_time($e_time);

		my $rdate = $e_rdate ? sprintf_date($e_rdate) : $date;
		my $rtime = $e_rtime ? sprintf_time($e_rtime) : $time;

		my $platform  = $e->getAttribute('platform');
		my $line      = $e_line->getAttribute('number');
		my $dest      = $e_line->getAttribute('direction');
		my $info      = $e_info->textContent;
		my $countdown = $e->getAttribute('countdown');
		my $delay     = $e_info->getAttribute('delay') // 0;
		my $type      = $e_info->getAttribute('name');

		my $platform_is_db = 0;

		my @line_obj
		  = grep { $_->{identifier} eq $e_line->getAttribute('stateless') }
		  @{ $self->{lines} };

		if ( $platform =~ s{ ^ \# }{}ox ) {
			$platform_is_db = 1;
		}

		push(
			@results,
			Travel::Status::DE::VRR::Result->new(
				date        => $rdate,
				time        => $rtime,
				platform    => $platform,
				platform_db => $platform_is_db,
				lineref     => $line_obj[0] // undef,
				line        => $line,
				destination => decode( 'UTF-8', $dest ),
				countdown   => $countdown,
				info        => decode( 'UTF-8', $info ),
				delay       => $delay,
				sched_date  => $date,
				sched_time  => $time,
				type        => $type,
			)
		);
	}

	@results = map { $_->[0] }
	  sort { $a->[1] <=> $b->[1] }
	  map { [ $_, $_->countdown ] } @results;

	$self->{results} = \@results;

	return @results;
}

1;

__END__

=head1 NAME

Travel::Status::DE::VRR - unofficial VRR departure monitor

=head1 SYNOPSIS

    use Travel::Status::DE::VRR;

    my $status = Travel::Status::DE::VRR->new(
        place => 'Essen', name => 'Helenenstr'
    );

    for my $d ($status->results) {
        printf(
            "%s %d %-5s %s\n",
            $d->time, $d->platform, $d->line, $d->destination
        );
    }

=head1 VERSION

version 1.00

=head1 DESCRIPTION

Travel::Status::DE::VRR is an unofficial interface to the VRR departure
monitor available at
L<http://efa.vrr.de/vrr/XSLT_DM_REQUEST?language=de&itdLPxx_transpCompany=vrr&>.

It reports all upcoming tram/bus/train departures at a given place.

=head1 METHODS

=over

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

Requests the departures as specified by I<opts> and returns a new
Travel::Status::DE::VRR object.  Dies if the wrong I<opts> were passed.

Arguments:

=over

=item B<place> => I<place>

Name of the place/city

=item B<type> => B<address>|B<poi>|B<stop>

Type of the following I<name>.  B<poi> means "point of interest".  Defaults to
B<stop> (stop/station name).

=item B<name> => I<name>

address / poi / stop name to list departures for.

=back

=item $status->errstr

In case of en HTTP request or EFA error, returns a string describing it. If
none occured, returns undef.

=item $status->lines

Returns a list of Travel::Status::DE::VRR::Line(3pm) objects, each one
describing one line servicing the selected station.

=item $status->results

Returns a list of Travel::Status::DE::VRR::Result(3pm) objects, each one describing
one departure.

=back

=head1 DIAGNOSTICS

None.

=head1 DEPENDENCIES

=over

=item * Class::Accessor(3pm)

=item * LWP::UserAgent(3pm)

=item * XML::LibXML(3pm)

=back

=head1 BUGS AND LIMITATIONS

Not all features of the web interface are supported.

=head1 SEE ALSO

efa-m(1), Travel::Status::DE::VRR::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.