summaryrefslogtreecommitdiff
path: root/lib/Travel/Status/DE/URA.pm
blob: c08ec4954579686697533064dec86f89bd9f9e58 (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
package Travel::Status::DE::URA;

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

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

our $VERSION = '2.00';

# create CONSTANTS for different Return Types
use constant {
	TYPE_STOP       => 0,
	TYPE_PREDICTION => 1,
	TYPE_MESSAGE    => 2,
	TYPE_BASE       => 3,
	TYPE_URA        => 4,
};

use Carp qw(confess cluck);
use DateTime;
use Encode qw(encode decode);
use List::MoreUtils qw(firstval none uniq);
use LWP::UserAgent;
use Text::CSV;
use Travel::Status::DE::URA::Result;
use Travel::Status::DE::URA::Stop;

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

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

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

	if ( not( $opt{ura_base} and $opt{ura_version} ) ) {
		confess('ura_base and ura_version are mandatory');
	}

	my $self = {
		datetime => $opt{datetime}
		  // DateTime->now( time_zone => 'Europe/Berlin' ),
		developer_mode => $opt{developer_mode},
		ura_base       => $opt{ura_base},
		ura_version    => $opt{ura_version},
		full_routes    => $opt{calculate_routes} // 0,
		hide_past      => $opt{hide_past} // 1,
		stop           => $opt{stop},
		via            => $opt{via},
		via_id         => $opt{via_id},
		stop_id        => $opt{stop_id},
		line_id        => $opt{line_id},
		circle         => $opt{circle},
		post           => {
			StopAlso => 'False',

			# for easier debugging ordered in the returned order
			ReturnList => 'stoppointname,stopid,stoppointindicator,'
			  . 'latitude,longitude,lineid,linename,'
			  . 'directionid,destinationtext,vehicleid,tripid,estimatedtime'
		},
	};

	if ( $opt{with_stops} ) {
		$self->{post}{StopAlso} = 'True';
	}

	$self->{ura_instant_url}
	  = $self->{ura_base} . '/instant_V' . $self->{ura_version};

	bless( $self, $class );

	$ua->env_proxy;

	if ( substr( $self->{ura_instant_url}, 0, 5 ) ne 'file:' ) {

		# filter by stop_id only if full_routes is not set
		if ( not $self->{full_routes} and $self->{stop_id} ) {
			$self->{post}{StopID} = $self->{stop_id};

			# filter for via as well to make via work
			if ( defined $self->{via_id} ) {
				$self->{post}{StopID} .= q{,} . $self->{via_id};
			}
		}

		# filter by line
		if ( $self->{line_id} ) {
			$self->{post}{LineID} = $self->{line_id};
		}

		# filter for Stops in circle (lon,lat,dist)
		if ( $self->{circle} ) {
			$self->{post}{Circle} = $self->{circle};
		}

		$response = $ua->post( $self->{ura_instant_url}, $self->{post} );
	}
	else {
		$response = $ua->get( $self->{ura_instant_url} );
	}

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

	my $raw_str = $response->decoded_content;

	if ( $self->{developer_mode} ) {
		say decode( 'UTF-8', $raw_str );
	}

	# Fix encoding in case we're running through test files
	if ( substr( $self->{ura_instant_url}, 0, 5 ) eq 'file:' ) {
		$raw_str = encode( 'UTF-8', $raw_str );
	}
	$self->parse_raw_data($raw_str);

	return $self;
}

sub parse_raw_data {
	my ( $self, $raw_str ) = @_;
	my $csv = Text::CSV->new( { binary => 1 } );

	for my $dep ( split( /\r\n/, $raw_str ) ) {
		$dep =~ s{^\[}{};
		$dep =~ s{\]$}{};

		$csv->parse($dep);
		my @fields = $csv->fields;

		# encode all fields
		for my $i ( 1, 11 ) {
			$fields[$i] = encode( 'UTF-8', $fields[$i] );
		}

		push( @{ $self->{raw_list} }, \@fields );

		my $type = $fields[0];

		if ( $type == TYPE_STOP ) {
			my $stop_name = $fields[1];
			my $stop_id   = $fields[2];
			my $longitude = $fields[3];
			my $latitude  = $fields[4];

			# create Stop Dict
			if ( not exists $self->{stops}{$stop_id} ) {
				$self->{stops}{$stop_id} = Travel::Status::DE::URA::Stop->new(
					name      => decode( 'UTF-8', $stop_name ),
					id        => $stop_id,
					longitude => $longitude,
					latitude  => $latitude,
				);
			}
		}
		if ( $type == TYPE_PREDICTION ) {
			push( @{ $self->{stop_names} }, $fields[1] );
		}
	}

	@{ $self->{stop_names} } = uniq @{ $self->{stop_names} };

	return $self;
}

sub get_stop_by_name {
	my ( $self, $name ) = @_;

	my $nname = lc($name);
	my $actual_match = firstval { $nname eq lc($_) } @{ $self->{stop_names} };

	if ($actual_match) {
		return $actual_match;
	}

	return ( grep { $_ =~ m{$name}i } @{ $self->{stop_names} } );
}

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

	return $self->{stops};
}

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

	return $self->{errstr};
}

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

	my $full_routes = $opt{calculate_routes} // $self->{full_routes} // 0;
	my $hide_past   = $opt{hide_past}        // $self->{hide_past}   // 1;
	my $line_id     = $opt{line_id}          // $self->{line_id};
	my $stop        = $opt{stop}             // $self->{stop};
	my $stop_id     = $opt{stop_id}          // $self->{stop_id};
	my $via         = $opt{via}              // $self->{via};
	my $via_id      = $opt{via_id}           // $self->{via_id};

	my $dt_now = $self->{datetime};
	my $ts_now = $dt_now->epoch;

	if ( $via or $via_id ) {
		$full_routes = 1;
	}

	for my $dep ( @{ $self->{raw_list} } ) {

		my (
			$type,        $stopname, $stopid,    $stopindicator,
			$longitude,   $latitude, $lineid,    $linename,
			$directionid, $dest,     $vehicleid, $tripid,
			$timestamp
		) = @{$dep};
		my ( @route_pre, @route_post );

		# only work on Prediction informations
		if ( $type != TYPE_PREDICTION ) {
			next;
		}

		if ( $line_id and not( $lineid eq $line_id ) ) {
			next;
		}

		if ( $stop and not( $stopname eq $stop ) ) {
			next;
		}

		if ( $stop_id and not( $stopid eq $stop_id ) ) {
			next;
		}

		if ( not $timestamp ) {
			cluck("departure element without timestamp: $dep");
			next;
		}

		$timestamp /= 1000;

		if ( $hide_past and $ts_now > $timestamp ) {
			next;
		}

		my $dt_dep = DateTime->from_epoch(
			epoch     => $timestamp,
			time_zone => 'Europe/Berlin'
		);
		my $ts_dep = $dt_dep->epoch;

		if ($full_routes) {
			my @route
			  = map { [ $_->[12] / 1000, $_->[1], $_->[2], $_->[4], $_->[5] ] }
			  grep { $_->[11] == $tripid }
			  grep { $_->[0] == 1 } @{ $self->{raw_list} };

			@route_pre  = grep { $_->[0] < $ts_dep } @route;
			@route_post = grep { $_->[0] > $ts_dep } @route;

			if ( $via
				and none { $_->[1] eq $via } @route_post )
			{
				next;
			}

			if ( $via_id
				and none { $_->[2] eq $via_id } @route_post )
			{
				next;
			}

			if ($hide_past) {
				@route_pre = grep { $_->[0] >= $ts_now } @route_pre;
			}

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

			@route_pre = map {
				Travel::Status::DE::URA::Stop->new(
					datetime => DateTime->from_epoch(
						epoch     => $_->[0],
						time_zone => 'Europe/Berlin'
					),
					name      => decode( 'UTF-8', $_->[1] ),
					id        => $_->[2],
					longitude => $_->[3],
					latitude  => $_->[4],
				  )
			} @route_pre;
			@route_post = map {
				Travel::Status::DE::URA::Stop->new(
					datetime => DateTime->from_epoch(
						epoch     => $_->[0],
						time_zone => 'Europe/Berlin'
					),
					name      => decode( 'UTF-8', $_->[1] ),
					id        => $_->[2],
					longitude => $_->[3],
					latitude  => $_->[4],
				  )
			} @route_post;
		}

		push(
			@results,
			Travel::Status::DE::URA::Result->new(
				datetime       => $dt_dep,
				dt_now         => $dt_now,
				line           => $linename,
				line_id        => $lineid,
				destination    => $dest,
				route_pre      => [@route_pre],
				route_post     => [@route_post],
				stop           => $stopname,
				stop_id        => $stopid,
				stop_indicator => $stopindicator,
			)
		);
	}

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

	return @results;
}

# static
sub get_services {
	return (
		{
			ura_base    => 'http://ivu.aseag.de/interfaces/ura',
			ura_version => 1,
			name        => 'Aachener Straßenbahn und Energieversorgungs AG',
			shortname   => 'ASEAG',
		},
		{
			ura_base    => 'http://ura.itcs.mvg-mainz.de/interfaces/ura',
			ura_version => 1,
			name        => 'MVG Mainz',
			shortname   => 'mvg-mainz',
		},
		{
			ura_base    => 'http://countdown.api.tfl.gov.uk/interfaces/ura',
			ura_version => 1,
			name        => 'Transport for London',
			shortname   => 'TfL',
		}
	);
}

1;

__END__

=head1 NAME

Travel::Status::DE::URA - unofficial departure monitor for "Unified Realtime
API" data providers (e.g. ASEAG)

=head1 SYNOPSIS

    use Travel::Status::DE::URA;

    my $status = Travel::Status::DE::URA->new(
        ura_base => 'http://ivu.aseag.de/interfaces/ura',
        ura_version => '1',
        stop => 'Aachen Bushof'
    );

    for my $d ($status->results) {
        printf(
            "%s  %-5s %25s (in %d min)\n",
            $d->time, $d->line, $d->destination, $d->countdown
        );
    }

=head1 VERSION

version 2.00

=head1 DESCRIPTION

Travel::Status::DE::URA is an unofficial interface to URA-based realtime
departure monitors (as used e.g. by the ASEAG).  It reports all upcoming
departures at a given place in real-time.  Schedule information is not
included.

=head1 METHODS

=over

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

Requests the departures as specified by I<opts> and returns a new
Travel::Status::DE::URA object.

The following two parameters are mandatory:

=over

=item B<ura_base> => I<ura_base>

The URA base url.

=item B<ura_version> => I<version>

The version, may be any string.

=back

The request URL is I<ura_base>/instant_VI<version>, so for
C<< http://ivu.aseag.de/interfaces/ura >>, C<< 1 >> this module will send
requests to C<< http://ivu.aseag.de/interfaces/ura/instant_V1 >>.

All remaining parameters are optional.

=over

=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<circle> => I<lon,lat,dist>

Only request departures for stops which are located up to I<dist> meters
away from the location specified by I<lon> and I<lat>. Example parameter:
"50.78496,6.10897,100".

=item B<with_stops> => B<0>|B<1>

When set to B<1> (or any other true value): Also request all stops satisfying
the specified parameters. They can be accessed with B<get_stops>. Defaults to
B<0>.

=back

Additionally, all options supported by C<< $status->results >> may be specified
here, causing them to be used as defaults. Note that while they can be
overridden later, they may limit the set of departures requested from the
server.

=item $status->errstr

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

=item $status->get_stop_by_name(I<$stopname>)

Returns a list of stops matching I<$stopname>. For instance, if the stops
"Aachen Bushof", "Eupen Bushof", "Brand" and "Brandweiher" exist, the
parameter "bushof" will return "Aachen Bushof" and "Eupen Bushof", while
"brand" will only return "Brand".

=item $status->get_stops

Returns a hash reference describing all distinct stops returned by the request.
Each key is the unique ID of a stop and contains a
Travel::Status::DE::URA::Stop(3pm) object describing it.

Only works when $status was created with B<with_stops> set to a true value.
Otherwise, undef is returned.

=item $status->results(I<%opt>)

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

Accepted parameters (all are optional):

=over

=item B<calculate_routes> => I<bool> (default 0)

When set to a true value: Compute routes for all results, enabling use of
their B<route_> accessors. Otherwise, those will just return nothing
(undef / empty list, depending on context).

=item B<hide_past> => I<bool> (default 1)

Do not include past departures in the result list and the computed timetables.

=item B<line_id> => I<ID>

Only return departures of line I<ID>.

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

Only return departures at stop I<name>.

=item B<stop_id> => I<ID>

Only return departures at stop I<ID>.

=item B<via> => I<vianame>

Only return departures containing I<vianame> in their route after their
corresponding stop. Implies B<calculate_routes>=1.

=item B<via_id> => I<ID>

Only return departures containing I<ID> in their route after their
corresponding stop. Implies B<calculate_routes>=1.

=back

=back

=head1 DIAGNOSTICS

None.

=head1 DEPENDENCIES

=over

=item * Class::Accessor(3pm)

=item * DateTime(3pm)

=item * List::MoreUtils(3pm)

=item * LWP::UserAgent(3pm)

=item * Text::CSV(3pm)

=back

=head1 BUGS AND LIMITATIONS

Many.

=head1 SEE ALSO

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

=head1 AUTHOR

Copyright (C) 2013-2016 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>

=head1 LICENSE

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