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package Travel::Status::DE::DBWagenreihung;
use strict;
use warnings;
use 5.020;
our $VERSION = '0.00';
use Carp qw(cluck confess);
use JSON;
use LWP::UserAgent;
use Travel::Status::DE::DBWagenreihung::Wagon;
sub new {
my ( $class, %opt ) = @_;
if ( not $opt{train_number} ) {
confess('train_number option must be set');
}
if ( not $opt{departure} ) {
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},
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 = $datetime->strftime('%Y%m%d%H%M');
}
my ($content, $err) = $self->get_with_cache($cache, "${api_base}/${train_number}/${datetime}");
if ($err) {
$self->{errstr} = "Failed to fetch station data: $err";
return;
}
my $json = $self->{json}->decode($content);
if ($self->{developer_mode}) {
say $self->{json}->pretty->encode($json);
}
if (exists $json->{error}) {
$self->{errstr} = 'Backend error: ' . $json->{error}{msg};
return;
}
$self->{data} = $json->{data};
$self->{meta} = $json->{meta};
}
sub error {
my ($self) = @_;
return $self->{errstr};
}
sub wagons {
my ($self) = @_;
if (exists $self->{wagons}) {
return @{$self->{wagons}};
}
for my $group (@{$self->{data}{istformation}{allFahrzeuggruppe}}) {
for my $wagon (@{$group->{allFahrzeug}}) {
push(@{$self->{wagons}}, Travel::Status::DE::DBWagenreihung::Wagon->new(%{$wagon}));
}
}
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;
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