public async Task <GeoDistance> CalculateDistanceAsync(string departureIATACode, string destinationIATACode, CancellationToken cancellationToken)
{
// Special case if the departure airport is equal to the destination airport
// in this place don't IATA code exists
if (string.Equals(departureIATACode, destinationIATACode,
StringComparison.OrdinalIgnoreCase))
{
return(new GeoDistance(0.0));
}
double?savedGeoDistance = null;
try
{
savedGeoDistance = await _distancesRepository.GetDistanceAsync(departureIATACode, destinationIATACode, cancellationToken);
}
catch (Exception ex)
{
_logger.LogError("Error requesting data from the database: {@ex}", ex);
}
if (savedGeoDistance != null)
{
return(new GeoDistance(savedGeoDistance.Value));
}
var geoDistance = await _calculatorService.CalculateDistanceAsync(departureIATACode, destinationIATACode, cancellationToken);
_backgroundTaskProvider.AddBackgroundTask(c => _distancesRepository.AddDistanceAsync(departureIATACode, destinationIATACode, geoDistance.Miles, c));
return(geoDistance);
}
public async Task <IActionResult> GetDistancesAsync([FromQuery(Name = "from"), IATACodeValidation,
Required(AllowEmptyStrings = false)]
string departureAirportIATACode,
[FromQuery(Name = "to"),
Required(AllowEmptyStrings = false),
IATACodeValidation]
string destinationAirportIATACode,
CancellationToken cancellationToken)
{
var result = await _distanceCalculatorService.CalculateDistanceAsync(departureAirportIATACode, destinationAirportIATACode, cancellationToken);
return(Ok(_mapper.Map <GeoDistanceResponse>(result)));
}
public async Task <GeoDistance> CalculateDistanceAsync(string departureIATACode, string destinationIATACode, CancellationToken cancellationToken = default)
{
var naturalId = GenerateNaturalId(departureIATACode, destinationIATACode);
if (_memoryCache.TryGetValue <GeoDistance>(naturalId, out var geoDistance))
{
return(geoDistance);
}
geoDistance = await _calculatorService.CalculateDistanceAsync(departureIATACode, destinationIATACode, cancellationToken);
_memoryCache.Set(naturalId, geoDistance, _memoryCacheGeoDistanceEntryOptions);
return(geoDistance);
}
