public bool CheckIfWeatherWillBeGood(int hours, out string weatherAheadDescription)
{
weatherAheadDescription = "Weather will be fine.";
Forecast forecast = Smhi.GetForecast();
ForecastTimeSerie currentWeather = Smhi.GetCurrentWeather();
int i = 0;
foreach (ForecastTimeSerie timeSerie in forecast.timeseries
.Where(ts => ts.validTime >= currentWeather.validTime)
.OrderBy(ts => ts.validTime))
{
// Kolla om det kommer att regna för mycket
decimal precipitation = Math.Max(timeSerie.PrecipitationMax, timeSerie.PrecipitationMin);
if (precipitation > (decimal)MaxHourlyPrecipitaionMillimeter)
{
weatherAheadDescription = "Expecting rain as a maximum of " + precipitation.ToString("0.0") + " mm/h at " + timeSerie.ValidTimeLocal.ToShortTimeString() + ".";
return(false);
}
// Kolla om det är för hög sannolikhet för åska
if (timeSerie.ThunderProbability > MaxHourlyThunderPercent)
{
weatherAheadDescription = "Thunder warning of " + timeSerie.ThunderProbability + "% at " + timeSerie.ValidTimeLocal.ToShortTimeString() + ".";
return(false);
}
// Kolla om det kommer att bli för hög luftfuktighet
if (timeSerie.RelativeHumidity > MaxRelativeHumidityPercent)
{
weatherAheadDescription = "Expecting a relative humidity of " + timeSerie.RelativeHumidity + "% at " + timeSerie.ValidTimeLocal.ToShortTimeString() + ".";
return(false);
}
i++;
if (i > hours)
{
break;
}
}
return(true);
}
private async Task StartAsync()
{
while (true)
{
// First, add a new weather time serie to the list of historic weather.
ForecastTimeSerie currentWeather = _smhi.GetCurrentWeather();
var timeSerieNow = _weatherTimeSeries.OrderByDescending(ts => ts.validTime).FirstOrDefault(ts => ts.validTime == currentWeather.validTime);
if (timeSerieNow != null)
{
for (int i = 0; i < _weatherTimeSeries.Count; i++)
{
if (timeSerieNow.validTime.ToString("yyyy-MM-dd HH:mm") == _weatherTimeSeries[i].validTime.ToString("yyyy-MM-dd HH:mm"))
{
_weatherTimeSeries[i] = timeSerieNow;
}
}
}
else
{
_weatherTimeSeries.Add(currentWeather);
}
decimal currentPrecipitation = Math.Max(currentWeather.PrecipitationMax, currentWeather.PrecipitationMin);
// Calculate the wetness
int wetness = Convert.ToInt32(currentPrecipitation * 100);
foreach (var timeSerie in _weatherTimeSeries.Where(ts => ts.validTime > _systemTime.Now.ToUniversalTime().AddDays(-1)).OrderBy(ts => ts.validTime))
{
decimal precipitation = Math.Max(timeSerie.PrecipitationMin, timeSerie.PrecipitationMax);
// If it's raining, increase the wetness
wetness += Convert.ToInt32(precipitation * 100);
if (wetness > 100)
{
wetness = 100;
}
// If it's not raining, decrease wetness in relation to relative humidity
if (precipitation == 0)
{
// Increase wetness if relative humidity is high and grass is not so wet
if (timeSerie.RelativeHumidity >= 80 && wetness < 75)
{
wetness += (timeSerie.RelativeHumidity - 80);
}
// Lower wetness since grass is drying up
wetness -= (100 - timeSerie.RelativeHumidity) / 2;
}
if (wetness < 0)
{
wetness = 0;
}
}
Wetness = wetness;
IsWet = currentPrecipitation > 0 || Wetness > 10;
// Wait for 15 minutes
await Task.Delay(15 * 60 * 1000);
}
}