1 files changed, 134 insertions, 0 deletions
diff --git a/lib/Travelynx/Helper/DBDB.pm b/lib/Travelynx/Helper/DBDB.pm
new file mode 100644
index 0000000..2161962
--- /dev/null
+++ b/lib/Travelynx/Helper/DBDB.pm
@@ -0,0 +1,134 @@
+package Travelynx::Helper::DBDB;
+
+use strict;
+use warnings;
+use 5.020;
+
+use Encode qw(decode);
+use Mojo::Promise;
+use JSON;
+
+sub new {
+	my ( $class, %opt ) = @_;
+
+	my $version = $opt{version};
+
+	$opt{header}
+	  = { 'User-Agent' =>
+"travelynx/${version} on $opt{root_url} +https://finalrewind.org/projects/travelynx"
+	  };
+
+	return bless( \%opt, $class );
+
+}
+
+sub has_wagonorder_p {
+	my ( $self, $ts, $train_no ) = @_;
+	my $api_ts = $ts->strftime('%Y%m%d%H%M');
+	my $url
+	  = "https://lib.finalrewind.org/dbdb/has_wagonorder/${train_no}/${api_ts}";
+	my $cache   = $self->{cache};
+	my $promise = Mojo::Promise->new;
+
+	if ( my $content = $cache->get($url) ) {
+		if ( $content eq 'y' ) {
+			$promise->resolve;
+			return $promise;
+		}
+		elsif ( $content eq 'n' ) {
+			$promise->reject;
+			return $promise;
+		}
+	}
+
+	$self->{user_agent}->request_timeout(5)->head_p( $url => $self->{header} )
+	  ->then(
+		sub {
+			my ($tx) = @_;
+			if ( $tx->result->is_success ) {
+				$cache->set( $url, 'y' );
+				$promise->resolve;
+			}
+			else {
+				$cache->set( $url, 'n' );
+				$promise->reject;
+			}
+		}
+	)->catch(
+		sub {
+			$cache->set( $url, 'n' );
+			$promise->reject;
+		}
+	)->wait;
+	return $promise;
+}
+
+sub get_wagonorder_p {
+	my ( $self, $ts, $train_no ) = @_;
+	my $api_ts = $ts->strftime('%Y%m%d%H%M');
+	my $url
+	  = "https://www.apps-bahn.de/wr/wagenreihung/1.0/${train_no}/${api_ts}";
+
+	my $cache   = $self->{cache};
+	my $promise = Mojo::Promise->new;
+
+	if ( my $content = $cache->thaw($url) ) {
+		$promise->resolve($content);
+		return $promise;
+	}
+
+	$self->{user_agent}->request_timeout(5)->get_p( $url => $self->{header} )
+	  ->then(
+		sub {
+			my ($tx) = @_;
+			my $body = decode( 'utf-8', $tx->res->body );
+
+			my $json = JSON->new->decode($body);
+			$cache->freeze( $url, $json );
+			$promise->resolve($json);
+		}
+	)->catch(
+		sub {
+			my ($err) = @_;
+			$promise->reject($err);
+		}
+	)->wait;
+	return $promise;
+}
+
+sub get_stationinfo_p {
+	my ( $self, $eva ) = @_;
+
+	my $url = "https://lib.finalrewind.org/dbdb/s/${eva}.json";
+
+	my $cache   = $self->{cache};
+	my $promise = Mojo::Promise->new;
+
+	if ( my $content = $cache->thaw($url) ) {
+		$promise->resolve($content);
+		return $promise;
+	}
+
+	$self->{user_agent}->request_timeout(5)->get_p( $url => $self->{header} )
+	  ->then(
+		sub {
+			my ($tx) = @_;
+
+			if ( my $err = $tx->error ) {
+				return $promise->reject("HTTP $err->{code} $err->{message}");
+			}
+
+			my $json = $tx->result->json;
+			$cache->freeze( $url, $json );
+			return $promise->resolve($json);
+		}
+	)->catch(
+		sub {
+			my ($err) = @_;
+			return $promise->reject($err);
+		}
+	)->wait;
+	return $promise;
+}
+
+1;