private void _Service_WeatherUpdated(object sender, EventArgs e)
{
_SyncContext.Post((o) =>
{
WeatherMetrics = _Service.WeatherCurrent;
}, null);
}
private static WeatherMetrics CurrentFromJson(string response)
{
try
{
var json = JsonValue.Parse(response).GetObject();
if (json.GetNamedNumber("cod") != 200)
{
return(null);
}
var metrics = new WeatherMetrics();
metrics.DateTime = DateTimeOffset.FromUnixTimeSeconds((long)json.GetNamedNumber("dt"));
metrics.Temperature = (int)json.GetNamedObject("main").GetNamedNumber("temp");
var sys = json.GetNamedObject("sys");
metrics.Sunrise = DateTimeOffset.FromUnixTimeSeconds((long)sys.GetNamedNumber("sunrise"));
metrics.Sunset = DateTimeOffset.FromUnixTimeSeconds((long)sys.GetNamedNumber("sunset"));
var weather = json.GetNamedArray("weather").GetObjectAt(0);
metrics.Description = weather.GetNamedString("description");
metrics.Icon = weather.GetNamedString("icon");
return(metrics);
}
catch
{
return(null);
}
}
private async Task UpdateWeatherCurrentAsync()
{
using (var client = new HttpClient())
{
while (true)
{
var response = await client.GetStringAsync(_WeatherCurrentUri);
var metrics = CurrentFromJson(response);
if (metrics != null)
{
WeatherCurrent = metrics;
break;
}
// use a 2 seconds delay so we don't exceed the openweather quota
await Task.Delay(2000);
}
}
}
private static IEnumerable <WeatherMetrics> ForecastsFromJson(string response)
{
try
{
var json = JsonValue.Parse(response).GetObject();
if (json.GetNamedString("cod") != "200")
{
return(null);
}
var array = json.GetNamedArray("list");
// position the data to the next day start time (hour 0)
uint startIndex = 0;
while (true)
{
var dt = DateTimeOffset.FromUnixTimeSeconds((long)array.GetObjectAt(startIndex).GetNamedNumber("dt"));
if (dt.Hour == 0)
{
break;
}
startIndex++;
}
var forecasts = new List <WeatherMetrics>();
WeatherMetrics metrics = null;
// start at the very beginning of a day
for (uint i = startIndex; i < json.GetNamedNumber("cnt"); i++)
{
var item = array.GetObjectAt(i);
var dt = DateTimeOffset.FromUnixTimeSeconds((long)item.GetNamedNumber("dt"));
if ((dt.Hour == 0) && (metrics != null))
{
forecasts.Add(metrics);
metrics = null;
}
if (metrics == null)
{
metrics = new WeatherMetrics()
{
MinTemperature = int.MaxValue,
MaxTemperature = int.MinValue
};
}
var temperature = (int)item.GetNamedObject("main").GetNamedNumber("temp");
if (temperature < metrics.MinTemperature)
{
metrics.MinTemperature = temperature;
}
if (temperature > metrics.MaxTemperature)
{
metrics.MaxTemperature = temperature;
}
if (dt.Hour == 12)
{
metrics.DateTime = dt;
var weather = item.GetNamedArray("weather").GetObjectAt(0);
metrics.Description = weather.GetNamedString("description");
metrics.Icon = weather.GetNamedString("icon");
}
}
return(forecasts);
}
catch
{
return(null);
}
}
public TemperatureController(WeatherMetrics holder)
{
_holder = holder;
}
