protected async void btnPredictDelays_Click(object sender, EventArgs e)
{
var departureDate = DateTime.Parse(txtDepartureDate.Text);
departureDate = departureDate.AddHours(double.Parse(txtDepartureHour.Text));
var selectedAirport = aiports.FirstOrDefault(a => a.AirportCode == ddlOriginAirportCode.SelectedItem.Value);
if (selectedAirport != null)
{
var query = new DepartureQuery()
{
DepartureDate = departureDate,
DepartureDayOfWeek = ((int)departureDate.DayOfWeek) + 1, //Monday = 1
Carrier = txtCarrier.Text,
OriginAirportCode = selectedAirport.AirportCode,
OriginAirportLat = selectedAirport.Latitude,
OriginAirportLong = selectedAirport.Longitude,
DestAirportCode = ddlDestAirportCode.SelectedItem.Text
};
await GetWeatherForecast(query);
if (forecast == null)
{
throw new Exception("Forecast request did not succeed. Check Settings for weatherApiKey.");
}
PredictDelays(query, forecast).Wait();
}
UpdateStatusDisplay(prediction, forecast);
}
private async Task GetWeatherForecast(DepartureQuery departureQuery)
{
var departureDate = departureQuery.DepartureDate;
forecast = null;
try
{
var weatherPrediction = await openWeatherClient.GetWeatherForecast5d3hAsync(
(float)departureQuery.OriginAirportLong,
(float)departureQuery.OriginAirportLat);
if (weatherPrediction != null && weatherPrediction.List.Any())
{
// Extract the dates from the prediction, then find the closest matching date and time based on the departure date.
var dates = weatherPrediction.List.Select(x => x.DateTimeUtc).ToList();
var nearestDiff = dates.Min(date => Math.Abs((date - departureDate).Ticks));
var nearestDate = dates.First(date => Math.Abs((date - departureDate).Ticks) == nearestDiff);
forecast = (from f in weatherPrediction.List
where f.DateTimeUtc == nearestDate
select new ForecastResult()
{
WindSpeed = f.Wind?.SpeedKmph ?? 0,
Precipitation = f.Rain?.OneHourMm ?? 0,
Pressure = f.Main?.PressurehPa ?? 0,
ForecastIconUrl = GetImagePathFromIcon(f.Weather[0].Icon),
Condition = f.Weather[0].Description
}).FirstOrDefault();
}
}
catch (Exception ex)
{
System.Diagnostics.Trace.TraceError("Failed retrieving weather forecast: " + ex.ToString());
}
}
private async Task GetWeatherForecast(DepartureQuery departureQuery)
{
var departureDate = departureQuery.DepartureDate;
forecast = null;
try
{
var weatherPrediction = await darkSky.GetForecast(departureQuery.OriginAirportLat,
departureQuery.OriginAirportLong, new DarkSkyService.OptionalParameters
{
ExtendHourly = true,
DataBlocksToExclude = new List <ExclusionBlock> {
ExclusionBlock.Flags,
ExclusionBlock.Alerts, ExclusionBlock.Minutely
}
});
if (weatherPrediction.Response.Hourly.Data != null && weatherPrediction.Response.Hourly.Data.Count > 0)
{
var timeZone = DateTimeZoneProviders.Tzdb[weatherPrediction.Response.TimeZone];
var zonedDepartureDate = LocalDateTime.FromDateTime(departureDate)
.InZoneLeniently(timeZone);
forecast = (from f in weatherPrediction.Response.Hourly.Data
where f.DateTime == zonedDepartureDate.ToDateTimeOffset()
select new ForecastResult()
{
WindSpeed = f.WindSpeed ?? 0,
Precipitation = f.PrecipIntensity ?? 0,
Pressure = f.Pressure ?? 0,
ForecastIconUrl = GetImagePathFromIcon(f.Icon),
Condition = f.Summary
}).FirstOrDefault();
}
}
catch (Exception ex)
{
System.Diagnostics.Trace.TraceError("Failed retrieving weather forecast: " + ex.ToString());
}
}
private async Task PredictDelays(DepartureQuery query, ForecastResult forecast)
{
if (string.IsNullOrEmpty(mlUrl))
{
return;
}
var departureDate = DateTime.Parse(txtDepartureDate.Text);
prediction = new DelayPrediction();
try
{
using (var client = new HttpClient())
{
var predictionRequest = new PredictionRequest
{
OriginAirportCode = query.OriginAirportCode,
Month = query.DepartureDate.Month,
DayofMonth = query.DepartureDate.Day,
CRSDepHour = query.DepartureDate.Hour,
DayOfWeek = query.DepartureDayOfWeek,
Carrier = query.Carrier,
DestAirportCode = query.DestAirportCode,
WindSpeed = forecast.WindSpeed,
SeaLevelPressure = forecast.Pressure,
HourlyPrecip = forecast.Precipitation
};
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", mlApiKey);
client.BaseAddress = new Uri(mlUrl);
var response = await client.PostAsJsonAsync("", predictionRequest).ConfigureAwait(false);
if (response.IsSuccessStatusCode)
{
var result = await response.Content.ReadAsStringAsync();
var token = JToken.Parse(result);
var parsedResult = JsonConvert.DeserializeObject <PredictionResult>((string)token);
if (parsedResult.prediction == 1)
{
this.prediction.ExpectDelays = true;
this.prediction.Confidence = parsedResult.probability;
}
else if (parsedResult.prediction == 0)
{
this.prediction.ExpectDelays = false;
this.prediction.Confidence = parsedResult.probability;
}
else
{
this.prediction = null;
}
}
else
{
prediction = null;
Trace.Write($"The request failed with status code: {response.StatusCode}");
// Print the headers - they include the request ID and the timestamp, which are useful for debugging the failure
Trace.Write(response.Headers.ToString());
var responseContent = await response.Content.ReadAsStringAsync();
Trace.Write(responseContent);
}
}
}
catch (Exception ex)
{
prediction = null;
System.Diagnostics.Trace.TraceError("Failed retrieving delay prediction: " + ex.ToString());
throw;
}
}
