public async Task <Distance> HandleAsync(CalculateDistanceCommand command)
{
var airportA = await _airportQueryService.GetAsync(command.IataA);
var airportB = await _airportQueryService.GetAsync(command.IataB);
var geoA = airportA.Coordinates.GetGeoCoordinate();
var geoB = airportB.Coordinates.GetGeoCoordinate();
if (OneOfCoordinatesMissing(geoA, geoB))
{
return(null);
}
return(new Distance {
Meters = geoA.GetDistanceTo(geoB)
});
}
private static void CalculateDistance(string command)
{
ICommand<double> cmd = new CalculateDistanceCommand(provider, command);
Console.WriteLine("Distance between these systems is: {0:N2} ly", cmd.Execute());
}