Use correct base URL when running a command job (work/maintenance)

examples/travelynx.conf

@@ -5,6 +5,16 @@
 # 'localhost'.
 
 {
+	# Base URL of this travelynx installation, e.g. "https://travelynx.de" for
+	# travelynx.de. Used to identify this travelynx instance when performing API
+	# requests (so API providers know whom to contact case of issues) and for
+	# imprint and other links in travelynx E-Mails. Note that this entry is
+	# only used when travelynx is performing requests or sending E-mails from
+	# a "work", "worker", or "maintenance" job. Otherwise, it will infer the
+	# base URL from the HTTP request.  If your travelynx instance is reachable
+	# via multiple URLs, use any one of them.
+	base_url => Mojo::URL->new('https://FIXME.local'),
+
 	# travelynx relies on several backend projects. You may override the
 	# defaults to use other (e.g. self-hosted) instances.
 	backend => {

lib/Travelynx.pm

@@ -276,6 +276,17 @@ sub startup {
 		}
 	);
 
+	$self->helper(
+		base_url_for => sub {
+			my ( $self, $path ) = @_;
+			if ( ( my $url = $self->url_for($path) )->base ne q{} ) {
+				return $url;
+			}
+			return $self->url_for($path)
+			  ->base( $self->app->config->{base_url} );
+		}
+	);
+
 	$self->helper(
 		hafas => sub {
 			my ($self) = @_;
@@ -284,7 +295,7 @@ sub startup {
 				hafas_rest_api => $self->app->config->{backend}{hafas_rest_api},
 				main_cache     => $self->app->cache_iris_main,
 				realtime_cache => $self->app->cache_iris_rt,
-				root_url       => $self->url_for('/')->to_abs,
+				root_url       => $self->base_url_for('/')->to_abs,
 				user_agent     => $self->ua,
 				version        => $self->app->config->{version},
 			);
@@ -298,7 +309,7 @@ sub startup {
 				log            => $self->app->log,
 				main_cache     => $self->app->cache_iris_main,
 				realtime_cache => $self->app->cache_iris_rt,
-				root_url       => $self->url_for('/')->to_abs,
+				root_url       => $self->base_url_for('/')->to_abs,
 				version        => $self->app->config->{version},
 			);
 		}
@@ -317,7 +328,7 @@ sub startup {
 			state $trwl_api = Travelynx::Helper::Traewelling->new(
 				log        => $self->app->log,
 				model      => $self->traewelling,
-				root_url   => $self->url_for('/')->to_abs,
+				root_url   => $self->base_url_for('/')->to_abs,
 				user_agent => $self->ua,
 				version    => $self->app->config->{version},
 			);
@@ -406,7 +417,7 @@ sub startup {
 			state $dbdb = Travelynx::Helper::DBDB->new(
 				log        => $self->app->log,
 				cache      => $self->app->cache_iris_main,
-				root_url   => $self->url_for('/')->to_abs,
+				root_url   => $self->base_url_for('/')->to_abs,
 				user_agent => $self->ua,
 				version    => $self->app->config->{version},
 			);