/// <summary>
/// Tries to get weather information from each of its sources in order
/// </summary>
/// <param name="latitude"></param>
/// <param name="longitude"></param>
/// <returns></returns>
public async Task <GenericWeather> GetGenericWeatherAsync(double latitude, double longitude)
{
// Read name of preferred weather provider from file if it exists (e.g. NWSWeather)
if (_preferredSource == null)
{
_preferredSource = await FileUtil.ReadFileAsync("WeatherProvider.config") ?? DefaultSource;
}
// Try the preferred source first
if (_preferredSource != DefaultSource)
{
LogService.Write($"Preferred source has been specified: {_preferredSource}");
// Check if the preferred source matches an available source
IWeather source = Sources.FirstOrDefault(x => x.GetType().Name == _preferredSource);
if (source != null)
{
try
{
LogService.Write($"Getting weather from: {source.Name}...");
var weather = await source.GetGenericWeatherAsync(latitude, longitude);
if (weather != null)
{
return(weather);
}
}
catch (Exception ex)
{
LogService.WriteException(ex);
}
}
}
// Query each weather provider until we get a response or exhaust the list
foreach (var source in Sources)
{
try
{
LogService.Write($"Getting weather from: {source.Name}...");
var weather = await source.GetGenericWeatherAsync(latitude, longitude);
if (weather != null)
{
return(weather);
}
}
catch (Exception ex)
{
LogService.WriteException(ex);
}
}
return(null);
}