private string MapExcludeToQueryParameter(ExcludeParameter excludeParameter)
{
switch (excludeParameter)
{
case ExcludeParameter.None:
return(string.Empty);
case ExcludeParameter.Minutely:
return("exclude=minutely");
case ExcludeParameter.Hourly:
return("exclude=hourly");
case ExcludeParameter.Alerts:
return("exclude=alerts");
case ExcludeParameter.Flags:
return("exclude=flags");;
case ExcludeParameter.AlertsAndFlags:
return("exclude=alerts,flags");
case ExcludeParameter.AllExceptDailyAndCurrently:
return("exclude=minutely,hourly,alerts,flags");
default:
return(string.Empty);
}
}
private string BuildRelativeCityUrl(City city, ExcludeParameter excludeParameter, MetricSystem metricSystem)
{
string relativeUrlForCityWithoutQueryParams = city.Latitude + "," + city.Longitude;
string excludeQueryParameter = MapExcludeToQueryParameter(excludeParameter);
string metricQueryParametere = MapMetricSystemToQueryParameter(metricSystem);
return(relativeUrlForCityWithoutQueryParams + "?" + excludeQueryParameter + "&" + metricQueryParametere);
}
private async Task <WeatherDataRoot> ProcessCityWeatherDataQuery(City city, ExcludeParameter excludeParameter, MetricSystem metricSystem)
{
string relativeUrlWithQueryParams = BuildRelativeCityUrl(ArgumentValidation.ThrowIfNull(city, nameof(city)), excludeParameter, metricSystem);
Uri fullUrl;
string rawWeatherData;
try
{
fullUrl = new Uri(_darkSkyForecastBaseUrl, relativeUrlWithQueryParams);
rawWeatherData = await _weatherDataRetriever.FetchWeatherData(fullUrl);
}
catch (UriFormatException ex)
{
Logger.Error("The retrieved DarkSky Forecast Request URL used has invalid format.", ex);
throw ex;
}
catch (HttpRequestException ex)
{
Logger.Error("The DarkSky Forecast Request failed due to an underlying issue e.g. network connectivity.", ex);
throw ex;
}
catch (ArgumentOutOfRangeException ex)
{
Logger.Error("The DarkSky Forecast Base URL processing was unsuccessful.", ex);
throw ex;
}
catch (ArgumentNullException ex)
{
Logger.Error("The DarkSky Forecast Base URL was null.", ex);
throw ex;
}
if (Logger.IsInfoEnabled)
{
Logger.Info($"Successful weather data retrieval for {city.Name} from URL: {fullUrl}");
}
WeatherDataRoot weatherDataForCity;
try
{
weatherDataForCity = ParseWeatherDataFromStringResult(rawWeatherData);
}
catch (ArgumentNullException ex)
{
weatherDataForCity = null;
Logger.Error("JSON parser had to work on a null raw response.", ex);
throw ex;
}
if (weatherDataForCity != null)
{
weatherDataForCity.CityName = city.Name;
}
return(weatherDataForCity);
}
public async Task <IEnumerable <WeatherDataRoot> > GetWeatherDataForMultipleCities(IEnumerable <City> cities, ExcludeParameter excludeParameter = ExcludeParameter.AllExceptDailyAndCurrently, MetricSystem metricSystem = MetricSystem.AUTO)
{
IList <WeatherDataRoot> weatherDataList = new List <WeatherDataRoot>();
foreach (City city in cities)
{
WeatherDataRoot weatherDataForCity = await ProcessCityWeatherDataQuery(city, excludeParameter, metricSystem);
weatherDataList.Add(weatherDataForCity);
}
return(weatherDataList.ToArray());
}
public async Task <WeatherDataRoot> GetWeatherDataForCity(City city, ExcludeParameter excludeParameter = ExcludeParameter.AllExceptDailyAndCurrently, MetricSystem metricSystem = MetricSystem.AUTO)
{
return(await ProcessCityWeatherDataQuery(city, excludeParameter, metricSystem));
}
