/// <summary>
/// Find distance between two airports
/// </summary>
/// <param name="airportFrom">IATA code airport from</param>
/// <param name="airportTo">IATA code airport to</param>
/// <returns></returns>
public DistanceResultResponseDto FindDistanceBetweenAirports(
string airportFrom,
string airportTo,
EMeasureUnitDto measureUnit = EMeasureUnitDto.Meters)
{
CheckAirportCode(airportFrom, airportTo);
airportTo = airportTo.ToUpperInvariant();
airportFrom = airportFrom.ToUpperInvariant();
if (TryGetFromCache(airportFrom, airportTo, measureUnit, out var cacheResult))
{
return(cacheResult);
}
var airportDataFrom = _gatewayService.GetAirportData(airportFrom);
var airportDataTo = _gatewayService.GetAirportData(airportTo);
var fromGeoPoint = airportDataFrom.ConvertToGeoPoint();
var toGeoPoint = airportDataTo.ConvertToGeoPoint();
var distance = _getGeoDistanceResolver.ResolveDistance(
fromGeoPoint,
toGeoPoint,
(EMeasureUnit)Enum.Parse(typeof(EMeasureUnit), measureUnit.ToString()));
var result = new DistanceResultResponseDto()
{
Distance = distance,
FromAirport = airportDataFrom.ConvertToDto(),
ToAirport = airportDataTo.ConvertToDto()
};
SaveToCache(airportFrom, airportTo, measureUnit, result);
return(result);
}
private void SaveToCache(string airportFrom, string airportTo, EMeasureUnitDto measureUnit, DistanceResultResponseDto result)
{
_memoryCache.Set(
GetKey(airportFrom, airportTo, measureUnit),
result,
new MemoryCacheEntryOptions().SetAbsoluteExpiration(TimeSpan.FromMinutes(5)));
}
private bool TryGetFromCache(string airportFrom, string airportTo, EMeasureUnitDto measureUnit, out DistanceResultResponseDto resultCache)
{
var key = GetKey(airportFrom, airportTo, measureUnit);
if (_memoryCache.TryGetValue(key, out var result))
{
resultCache = (DistanceResultResponseDto)result;
return(true);
}
resultCache = null;
return(false);
}
