/// <summary>
/// If the ICAO code is in airportList, and the number of runways is at least 1,
/// we set the list of runways. Then we attempt to download the matar and
/// select a runway with maximum headwind component.
///
/// If ICAO is not found in airportList, this method clears the list of runways.
/// If we cannot successfully find the runway with max headwind component, the
/// selected runway is set arbitrarily.
///
/// GetIcao should always return a non-null result. SetRunways and SetSelectedRunway
/// should not throw with non-null inputs.
/// </summary>
public static async Task UpdateRunways(
Func <string> GetIcao,
Action <IEnumerable <string> > SetRunways,
Action <string> SetSelectedRunway,
AirportManager airportList)
{
var icaoBeforeAwait = GetIcao();
var rwyList = airportList.RwyIdents(icaoBeforeAwait)?.ToList();
if (rwyList != null && rwyList.Count > 0)
{
SetRunways(rwyList);
var runways = airportList[icaoBeforeAwait].Rwys;
var(success, rwy) = await SelectRwyBasedOnWind(
runways, icaoBeforeAwait);
// Only choose runway based on weather if the ICAO does not change
// during the await.
SetSelectedRunway((success && icaoBeforeAwait == GetIcao()) ? rwy : rwyList[0]);
}
else
{
SetRunways(new string[0]);
}
}
public AlternateFinder(AirportManager airportList)
{
this.airportList = airportList;
}