Journey: Add operators accessor

bin/hafas-m

@@ -439,18 +439,10 @@ elsif ( $opt{journey} ) {
 		$delay_fmt = $delay_len + 3;
 	}
 
-	if ( @prods == 1 ) {
-		if ( $prev_prod->operator ) {
-			printf( "Betrieb: %s\n", $prev_prod->operator );
-		}
-	}
-	else {
-		printf(
-			"Betrieb: %s\n",
-			join( q{, },
-				uniq map { $_->operator } grep { $_->operator } @prods )
-		);
+	if ( $result->operators ) {
+		printf( "Betrieb: %s\n", join( q{, }, $result->operators ) );
 	}
+
 	$prev_prod = 0;
 
 	my $desc = Travel::Status::DE::HAFAS::get_service($service) // {};

lib/Travel/Status/DE/HAFAS/Journey.pm

@@ -8,7 +8,7 @@ use 5.014;
 
 use parent 'Class::Accessor';
 use DateTime::Format::Strptime;
-use List::Util qw(any);
+use List::Util qw(any uniq);
 use Travel::Status::DE::HAFAS::Stop;
 
 our $VERSION = '6.00';
@@ -270,6 +270,23 @@ sub messages {
 	return;
 }
 
+sub operators {
+	my ($self) = @_;
+
+	if ( $self->{operators} ) {
+		return @{ $self->{operators} };
+	}
+
+	$self->{operators} = [
+		uniq map { ( $_->prod_arr // $_->prod_dep )->operator } grep {
+			      ( $_->prod_arr or $_->prod_dep )
+			  and ( $_->prod_arr // $_->prod_dep )->operator
+		} $self->route
+	];
+
+	return @{ $self->{operators} };
+}
+
 sub polyline {
 	my ($self) = @_;
 
@@ -549,7 +566,13 @@ detailed delay reasons (e.g. "switch damage between X and Y, expect delays").
 =item $journey->operator
 
 The operator responsible for this journey. Returns undef
-if the backend does not provide an operator.
+if the backend does not provide an operator. Note that the operator may
+change along the journey -- in this case, the returned operator depends on
+the backend and appears to be the first one in most cases.
+
+=item $journey->operators
+
+List of all operators observed along the journey.
 
 =item $journey->station (station only)