internal static IEnumerable <Encounter> TowEncounter(this FlightContext context)
{
var nearbyAircraft = context.Options.NearbyAircraftAccessor?.Invoke(
context.CurrentPosition.Location,
0.5)
.ToList();
if (nearbyAircraft == null)
{
yield break;
}
foreach (var aircraft in nearbyAircraft)
{
var iAm = context.WhatAmI(aircraft);
if (iAm == AircraftRelation.OnTow)
{
yield return(new Encounter
{
Aircraft = aircraft.Options.AircraftId,
Start = aircraft.Flight.DepartureTime,
Type = EncounterType.Tug
});
}
else if (iAm == AircraftRelation.Towplane)
{
yield return(new Encounter
{
Aircraft = aircraft.Options.AircraftId,
Start = aircraft.Flight.DepartureTime,
Type = EncounterType.Tow
});
}
else if (iAm == AircraftRelation.Indeterministic)
{
yield return(null);
}
}
}
internal static void TrackAerotow(this FlightContext context)
{
// ToDo: Think about the possibility of a paired landing.
if (context.Options.AircraftAccessor == null)
{
throw new Exception($"Unable to track tow without {nameof(FlightContextFactory)}");
}
var target = context.Flight.Encounters
.FirstOrDefault(q => q.Type == Models.EncounterType.Tow ||
q.Type == Models.EncounterType.Tug);
if (target == null)
{
// Note of caution; this situation should ideally never happen. If it does it would be a design flaw in the state machine?
context.StateMachine.Fire(FlightContext.Trigger.LaunchCompleted);
return;
}
var otherContext = context.Options.AircraftAccessor(target.Aircraft);
var iAm = context.WhatAmI(otherContext);
if (iAm == null)
{
return; // (I'm nothing. Try again next time)
}
if (iAm == Internal.Geo.AircraftRelation.None ||
(target.Type == Models.EncounterType.Tow && iAm != Internal.Geo.AircraftRelation.Towplane) ||
(target.Type == Models.EncounterType.Tug && iAm != Internal.Geo.AircraftRelation.OnTow))
{
target.End = context.CurrentPosition.TimeStamp;
context.StateMachine.Fire(FlightContext.Trigger.LaunchCompleted);
context.InvokeOnLaunchCompletedEvent();
return;
}
}