add undo for checkouts

index.pl

@@ -303,6 +303,10 @@ helper 'undo' => sub {
 		return 'Nested undo (undoing an undo) is not supported';
 	}
 
+	if ( @{$rows} > 1 and $rows->[1][0] == $action_type{undo}) {
+		return 'Repeated undo is not supported';
+	}
+
 	my $success = $self->app->undo_query->execute(
 		$self->get_user_id,
 		DateTime->now( time_zone => 'Europe/Berlin' )->epoch,

templates/departures.html.ep

@@ -15,6 +15,20 @@
 				</div>
 			</div>
 		% }
+		% elsif ($status->{timestamp_delta} < 600) {
+			<div class="card grey darken-4">
+				<div class="card-content white-text">
+					<span class="card-title">Ausgecheckt</span>
+					<p>Aus <%= $status->{train_type} %> <%= $status->{train_no} %>
+						bis <%= $status->{station_name} %></p>
+				</div>
+				<div class="card-action">
+					<a class="action-undo">
+						<i class="material-icons">undo</i> Rückgängig?
+					</a>
+				</div>
+			</div>
+		% }
 	</div>
 </div>
 <div class="row">