package Travel::Status::DE::DBWagenreihung; use strict; use warnings; use 5.020; our $VERSION = '0.01'; use Carp qw(cluck confess); use JSON; use List::Util qw(uniq); use LWP::UserAgent; use Travel::Status::DE::DBWagenreihung::Section; use Travel::Status::DE::DBWagenreihung::Wagon; sub new { my ( $class, %opt ) = @_; if ( not $opt{train_number} and not $opt{from_json} ) { confess('train_number option must be set'); } if ( not $opt{departure} and not $opt{from_json} ) { confess('departure option must be set'); } my $self = { api_base => $opt{api_base} // 'https://www.apps-bahn.de/wr/wagenreihung/1.0', developer_mode => $opt{developer_mode}, cache => $opt{cache}, departure => $opt{departure}, from_json => $opt{from_json}, json => JSON->new, serializable => $opt{serializable}, train_number => $opt{train_number}, user_agent => $opt{user_agent}, }; bless( $self, $class ); if ( not $self->{user_agent} ) { my %lwp_options = %{ $opt{lwp_options} // { timeout => 10 } }; $self->{user_agent} = LWP::UserAgent->new(%lwp_options); $self->{user_agent}->env_proxy; } $self->get_wagonorder; return $self; } sub get_wagonorder { my ($self) = @_; my $api_base = $self->{api_base}; my $cache = $self->{cache}; my $train_number = $self->{train_number}; my $datetime = $self->{departure}; if ( ref($datetime) eq 'DateTime' ) { $datetime = $datetime->strftime('%Y%m%d%H%M'); } my $json = $self->{from_json}; if ( not $json ) { my ( $content, $err ) = $self->get_with_cache( $cache, "${api_base}/${train_number}/${datetime}" ); if ($err) { $self->{errstr} = "Failed to fetch station data: $err"; return; } $json = $self->{json}->utf8->decode($content); } if ( exists $json->{error} ) { $self->{errstr} = 'Backend error: ' . $json->{error}{msg}; return; } if ( @{ $json->{data}{istformation}{allFahrzeuggruppe} // [] } == 0 and @{ $json->{data}{istformation}{halt} // [] } == 0 ) { $self->{errstr} = 'No wagon order available'; return; } $self->{data} = $json->{data}; $self->{meta} = $json->{meta}; } sub errstr { my ($self) = @_; return $self->{errstr}; } sub direction { my ($self) = @_; return $self->{direction}; } sub has_bad_wagons { my ($self) = @_; if ( defined $self->{has_bad_wagons} ) { return $self->{has_bad_wagons}; } for my $group ( @{ $self->{data}{istformation}{allFahrzeuggruppe} } ) { for my $wagon ( @{ $group->{allFahrzeug} } ) { my $pos = $wagon->{positionamhalt}; if ( $pos->{startprozent} eq '' or $pos->{endeprozent} eq '' or $pos->{startmeter} eq '' or $pos->{endemeter} eq '' ) { return $self->{has_bad_wagons} = 1; } } } return $self->{has_bad_wagons} = 0; } sub origins { my ($self) = @_; if ( exists $self->{origins} ) { return @{ $self->{origins} }; } my @origins; for my $group ( @{ $self->{data}{istformation}{allFahrzeuggruppe} } ) { push( @origins, $group->{startbetriebsstellename} ); } @origins = uniq @origins; $self->{origins} = \@origins; return @origins; } sub destinations { my ($self) = @_; if ( exists $self->{destinations} ) { return @{ $self->{destinations} }; } my @destinations; my %section; for my $group ( @{ $self->{data}{istformation}{allFahrzeuggruppe} } ) { my $destination = $group->{zielbetriebsstellename}; my @sections = map { $_->{fahrzeugsektor} } @{ $group->{allFahrzeug} }; @sections = uniq @sections; push( @{ $section{$destination} }, @sections ); push( @destinations, $destination ); } @destinations = uniq @destinations; @destinations = map { { name => $_, sections => $section{$_} } } @destinations; $self->{destinations} = \@destinations; return @destinations; } sub platform { my ($self) = @_; return $self->{data}{istformation}{halt}{gleisbezeichnung}; } sub sections { my ($self) = @_; if ( exists $self->{sections} ) { return @{ $self->{sections} }; } for my $section ( @{ $self->{data}{istformation}{halt}{allSektor} } ) { my $pos = $section->{positionamgleis}; if ( $pos->{startprozent} eq '' or $pos->{endeprozent} eq '' ) { next; } push( @{ $self->{sections} }, Travel::Status::DE::DBWagenreihung::Section->new( name => $section->{sektorbezeichnung}, start_percent => $pos->{startprozent}, end_percent => $pos->{endeprozent}, start_meters => $pos->{startmeter}, end_meters => $pos->{endemeter}, ) ); } return @{ $self->{sections} // [] }; } sub station_ds100 { my ($self) = @_; return $self->{data}{istformation}{halt}{rl100}; } sub station_name { my ($self) = @_; return $self->{data}{istformation}{halt}{bahnhofsname}; } sub station_uic { my ($self) = @_; return $self->{data}{istformation}{halt}{evanummer}; } sub train_type { my ($self) = @_; return $self->{data}{istformation}{zuggattung}; } sub train_numbers { my ($self) = @_; if ( exists $self->{train_numbers} ) { return @{ $self->{train_numbers} }; } my @numbers; for my $group ( @{ $self->{data}{istformation}{allFahrzeuggruppe} } ) { push( @numbers, $group->{verkehrlichezugnummer} ); } @numbers = uniq @numbers; $self->{train_numbers} = \@numbers; return @numbers; } sub train_no { my ($self) = @_; return $self->{data}{istformation}{zugnummer}; } sub train_subtype { my ($self) = @_; if ( exists $self->{train_subtype} ) { return $self->{train_subtype}; } my @wagons = $self->wagons; my %ml = ( 'ICE 1' => 0, 'ICE 2' => 0, 'ICE 3' => 0, 'ICE 3 V' => 0, 'ICE 4' => 0, 'ICE T 411' => 0, 'ICE T 415' => 0, 'IC2' => 0, ); for my $wagon (@wagons) { if ( not $wagon->model ) { next; } if ( $wagon->model == 401 or ( $wagon->model >= 801 and $wagon->model <= 804 ) ) { $ml{'ICE 1'}++; } elsif ( $wagon->model == 402 or ( $wagon->model >= 805 and $wagon->model <= 808 ) ) { $ml{'ICE 2'}++; } elsif ( $wagon->model == 403 or $wagon->model == 406 ) { $ml{'ICE 3'}++; } elsif ( $wagon->model == 407 ) { $ml{'ICE 3 V'}++; } elsif ( $wagon->model == 412 or $wagon->model == 812 ) { $ml{'ICE 4'}++; } elsif ( $wagon->model == 411 ) { $ml{'ICE T 411'}++; } elsif ( $wagon->model == 415 ) { $ml{'ICE T 415'}++; } elsif ( $wagon->is_dosto ) { $ml{'IC2'}++; } } my @likelihood = reverse sort { $ml{$a} <=> $ml{$b} } keys %ml; if ( $ml{ $likelihood[0] } <= 2 ) { # inconclusive return undef; } $self->{train_subtype} = $likelihood[0]; return $self->{train_subtype}; } sub wagons { my ($self) = @_; if ( exists $self->{wagons} ) { return @{ $self->{wagons} }; } for my $group ( @{ $self->{data}{istformation}{allFahrzeuggruppe} } ) { for my $wagon ( @{ $group->{allFahrzeug} } ) { my $wagon_object = Travel::Status::DE::DBWagenreihung::Wagon->new( %{$wagon} ); push( @{ $self->{wagons} }, $wagon_object ); if ( not $wagon_object->{position}{valid} ) { $self->{has_bad_wagons} = 1; } } } if ( @{ $self->{wagons} // [] } > 1 and not $self->has_bad_wagons ) { if ( $self->{wagons}[0]->{position}{start_percent} > $self->{wagons}[-1]->{position}{start_percent} ) { $self->{direction} = 100; } else { $self->{direction} = 0; } } if ( not $self->has_bad_wagons ) { @{ $self->{wagons} } = sort { $a->{position}->{start_percent} <=> $b->{position}->{start_percent} } @{ $self->{wagons} }; } # ->train_subtype calls ->wagons, so this call must not be made before # $self->{wagons} has beet set. my $tt = $self->train_subtype; if ($tt) { for my $wagon ( @{ $self->{wagons} } ) { $wagon->set_traintype($tt); } } return @{ $self->{wagons} // [] }; } sub get_with_cache { my ( $self, $cache, $url ) = @_; if ( $self->{developer_mode} ) { say "GET $url"; } if ($cache) { my $content = $cache->thaw($url); if ($content) { if ( $self->{developer_mode} ) { say ' cache hit'; } return ( ${$content}, undef ); } } if ( $self->{developer_mode} ) { say ' cache miss'; } my $ua = $self->{user_agent}; my $res = $ua->get($url); if ( $res->is_error ) { return ( undef, $res->status_line ); } my $content = $res->decoded_content; if ($cache) { $cache->freeze( $url, \$content ); } return ( $content, undef ); } 1; __END__ =head1 NAME Travel::Status::DE::DBWagenreihung - Interface to Deutsche Bahn Wagon Order API. =head1 SYNOPSIS use Travel::Status::DE::DBWagenreihung; my $wr = Travel::Status::DE::DBWagenreihung->new( departure => 'DateTime or YYYYMMDDhhmm', train_number => 1234, ); for my $wagon ( $wr->wagons ) { printf("Wagen %s: Abschnitt %s\n", $wagon->number // '?', $wagon->section); } =head1 VERSION version 0.01 =head1 DESCRIPTION Travel:Status:DE::DBWagenreihung is an unofficial interface to the Deutsche Bahn Wagon Order API at L. It returns station-specific wagon orders for long-distance trains operated by Deutsche Bahn. Data includes wagon positions on the platform, the ICE series, wagon-specific attributes such as first/second class or family coaches, and the internal type and number of each wagon. Positions on the platform are given both in meters and per cent (relative to platform length). At the time of this writing, only ICE trains are officially supported by the backend, and even then glitches may occur. IC/EC trains are not officially supported; reported wagon orders may be correct, may lack unscheduled changes, or may be completely bogus. =head1 METHODS =over =item my $wr = Travel::Status::DE::DBWagenreihung->new(I<%opts>) Requests wagon order for a specific train at a specific scheduled departure time and date, which implicitly encodes the requested station. Use L or similar to map station name and train number to scheduled departure. Arguments: =over =item B => I | I Scheduled departure at the station of interested. Must be either a L object or a string in YYYYMMDDhhmm format. Mandatory. =item B => I Train number. Do not include the train type: Use "8" for "EC 8" or "100" for "ICE 100". =back =item $wr->destinations Returns a list describing all final destinations of this train. In most cases, it contains one element, however, for trains consisting of multiple wings, it contains one element for each wing. Each destination is a hash ref containing the destination B and the corresponding platform I (at the moment, this is a list of section identifiers). This function is subject to change. =item $wr->direction Gives the train's direction of travel. Returns 0 if the train will depart towards position 0 and 100 if the train will depart towards the other platform end (mnemonic: towards the 100% position). =item $wr->errstr In case of a fatal HTTP or backend error, returns a string describing it. Returns undef otherwise. =item $wr->origins Returns a list of stations this train originates from. In most cases, this is just one element; however, for trains consisting of multiple wings, it gives the origin of each wing unless they are identical. Each origin is a station name. This function is subject to change. =item $wr->platform Returns the platform name. =item $wr->sections Describes the sections of the platform this train will depart from. Returns a list of L objects. =item $wr->station_ds100 Returns the DS100 identifier of the requested station. =item $wr->station_name Returns the name of the requested station. =item $wr->station_uic Returns the international id (UIC ID / IBNR) of the requested station. =item $wr->train_numbers Returns the list of train numbers for this departure. In most cases, this is just one element. For trains consisting of multiple wings (which typically have different numbers), it contains one element for each wing. =item $wr->train_type Returns a string describing the train type, e.g. "ICE" or "IC". =item $wr->train_subtype Returns a string describing the rolling stock used for this train, e.g. "ICE 4" or "IC2". =item $wr->wagons Describes the individual wagons the train consists of. Returns a list of L objects. =back =head1 DEPENDENCIES =over =item * L =item * L =back =head1 BUGS AND LIMITATIONS Many. This is beta software. =head1 REPOSITORY L =head1 AUTHOR Copyright (C) 2018-2019 by Daniel Friesel Ederf@finalrewind.orgE =head1 LICENSE This module is licensed under the same terms as Perl itself.