} //Prevent instantiation of helper.
public static AstronomyHelper Instance()
{
if (_helper is null && _repository is null)
{
_helper = new AstronomyHelper(); //Create new helper.
_repository = new AstroRepository(new AstronomyDbContext()); //Inject repository.
}
return(_helper);
}
private string GetConditionIconResource(WeatherCodes?codes, string weatherUnrecognizedCode, bool useTwilight,
DateTime?dateTime, IAstronomy astronomy)
{
if (!codes.HasValue || codes == WeatherCodes.Undefined)
{
Log.DebugFormat("Undefined condition icon code '{0}'.", codes);
return(null);
}
if (codes == WeatherCodes.Error)
{
Log.ErrorFormat("Unrecognized condition icon code '{0}'.", weatherUnrecognizedCode);
return(null);
}
var needTwilight = false;
var group = "_ovc";
if (codes == WeatherCodes.ClearSky)
{
group = "_skc";
needTwilight = true;
}
else if (codes.Value.HasFlag(WeatherCodes.ClearSky))
{
group = "_bkn";
needTwilight = true;
}
else if (codes.Value.HasFlag(WeatherCodes.Fog))
{
group = "_fg";
needTwilight = true;
}
var precipitation = string.Empty;
if (codes.Value.HasFlag(WeatherCodes.Heavy) || codes.Value.HasFlag(WeatherCodes.Storm))
{
precipitation += "_max";
}
else if (codes.Value.HasFlag(WeatherCodes.Light))
{
precipitation += "_min";
}
if (codes.Value.HasFlag(WeatherCodes.Thunderstorm))
{
precipitation += "_ts";
}
if (codes.Value.HasFlag(WeatherCodes.Rain))
{
precipitation += "_ra";
}
if (codes.Value.HasFlag(WeatherCodes.Snow))
{
precipitation += "_sn";
}
if (codes.Value.HasFlag(WeatherCodes.Hail))
{
precipitation = "_gr";
}
var result = string.Format("{0}{1}", group, precipitation);
if (needTwilight)
{
var twilightCalculatorState = "_d";
if (useTwilight && dateTime.HasValue && astronomy?.Sunrise != null && astronomy.Sunset.HasValue)
{
if ((dateTime <= astronomy.Sunrise || dateTime >= astronomy.Sunset) &&
(
dateTime <= astronomy.NextInfo?.Sunrise || dateTime >= astronomy.NextInfo?.Sunset ||
dateTime <= astronomy.PreviousInfo?.Sunrise || dateTime >= astronomy.PreviousInfo?.Sunset))
{
twilightCalculatorState = "_n";
}
}
result += twilightCalculatorState;
}
return(string.IsNullOrEmpty(group) ? null : result);
}
