public async Task <AverageTemperature> GetAverageTemperatureForPastHourAsync()
{
LastHourTemperature temperatureReponse = await _sMHIGateway.GetTemperatureDataForThePastHourAsync();
// We discard data for stations that are null
// If SMHI has returned multiple values for a station, we grab the first one.
// Unclear what it would mean if SMHI returned more than one value
List <LastHourTemperature.Value> nonNullValueObjsForEachStation = temperatureReponse.station
.Where(s => s.value != null)
.Select(s => s.value.FirstOrDefault()).ToList();
// List contains one temperature for each station that had data
List <string> temperatureForEachStation = nonNullValueObjsForEachStation
.Where(v => !string.IsNullOrWhiteSpace(v.value))
.Select(v => v.value).ToList();
List <double> allTemperaturesForSweden = new List <double>();
// Temperature is received as a string, so we can convert it to double
// We discard data that fails to convert
foreach (string temperatureAsStr in temperatureForEachStation)
{
double temperatureAsDouble;
if (double.TryParse(temperatureAsStr, out temperatureAsDouble))
{
allTemperaturesForSweden.Add(temperatureAsDouble);
}
}
if (!allTemperaturesForSweden.Any())
{
throw new ExternalException("Failed to retrieve any data.");
}
AverageTemperature temperatureData = new AverageTemperature()
{
Average = allTemperaturesForSweden.Average()
};
return(temperatureData);
}
public async Task <AllStationsTemperature> GetTemperatureForEachStationAsync()
{
LastHourTemperature temperatureReponse = await _sMHIGateway.GetTemperatureDataForThePastHourAsync();
AllStationsTemperature allStationsTemperature = new AllStationsTemperature()
{
Stations = new List <Station>()
};
foreach (LastHourTemperature.Station station in temperatureReponse.station)
{
List <LastHourTemperature.Value> stationValueList = station.value;
// Discard null data
if (stationValueList == null || !stationValueList.Any())
{
continue;
}
string temperatureAsStr = stationValueList.First().value;
double temperatureAsDouble;
if (!double.TryParse(temperatureAsStr, out temperatureAsDouble))
{
continue;
}
allStationsTemperature.Stations.Add(new Station()
{
Name = station.name,
Temperature = temperatureAsDouble
});
}
return(allStationsTemperature);
}
