package Travel::Status::DE::HAFAS; use strict; use warnings; use 5.010; 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 XML::LibXML; our $VERSION = '1.05'; my %hafas_instance = ( DB => { url => 'http://reiseauskunft.bahn.de/bin/bhftafel.exe', name => 'Deutsche Bahn', productbits => [qw[ice ic_ec d nv s bus ferry u tram ondemand x x x x]], } ); 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} // 'DB'; 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'); } my $ref = { active_service => $service, developer_mode => $conf{developer_mode}, 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 = $hafas_instance{$service}{url} . '/' . $lang . 'n'; $reply = $ua->post( $url, $ref->{post} ); if ( $reply->is_error ) { $ref->{errstr} = $reply->status_line; return $ref; } # the interface does not return valid XML (but it's close!) $ref->{raw_xml} = '' . $reply->content . ''; if ( $ref->{developer_mode} ) { say $ref->{raw_xml}; } $ref->{tree} = XML::LibXML->load_xml( string => $ref->{raw_xml}, # recover => 2, # suppress_errors => 1, # suppress_warnings => 1, ); 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}; $self->{post}{productsFilter} = '1' x ( scalar @{ $hafas_instance{$service}{productbits} } ); } 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 ' . $err->getAttribute('code') . ')'; } return; } sub errstr { my ($self) = @_; return $self->{errstr}; } sub results { my ($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} = $service; push( @services, \%desc ); } return @services; } sub get_service { my ($self) = @_; return %{ $hafas_instance{ $self->active_service } }; } 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. 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 and returns a new Travel::Status::DE::HAFAS element with the results. Dies if the wrong I were passed. Supported I are: =over =item B => I The train station to report for, e.g. "Essen HBf" or "Alfredusbad, Essen (Ruhr)". Mandatory. =item B => I
.I.I Date to report for. Defaults to the current day. =item B => I Set language for additional information. Accepted arguments: Beutsch, Bnglish, Btalian, B (dutch). =item B => 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