RAGE MP Useful snippets

AsyncHelper.cs

public static class AsyncHelper
{
	public static Task<T> RunAsync<T>(Func<T> callback)
	{
		var taskCompletion = new TaskCompletionSource<T>();

		NAPI.Task.Run(() =>
		{
			try
			{
				taskCompletion.TrySetResult(callback());
			}
			catch (OperationCanceledException)
			{
				taskCompletion.TrySetCanceled();
			}
			catch (Exception ex)
			{
				taskCompletion.TrySetException(ex);
			}
		});

		return taskCompletion.Task;
	}

	public static Task<T> RunAsync<T>(this GTANetworkMethods.Task gtanTask, Func<T> callback) =>
		RunAsync(callback);
}

TrailerChangeHelper.cs

public class TrailerChangeHelper
{
	public delegate void OnVehicleTrailerChangeHandler(Vehicle vehicle, Vehicle trailer);
	
	private readonly OnVehicleTrailerChangeHandler _attachedHandler;
	private readonly OnVehicleTrailerChangeHandler _detachedHandler;
	private readonly Dictionary<Vehicle, Vehicle> _vehiclesLastTrailers = new Dictionary<Vehicle, Vehicle>();

	public TrailerChangeHelper(OnVehicleTrailerChangeHandler attachedHandler, OnVehicleTrailerChangeHandler detachedHandler)
	{
		_attachedHandler = attachedHandler;
		_detachedHandler = detachedHandler;
	}

	public void HandleVehicleTrailerChange(Vehicle vehicle, Vehicle trailer)
	{
		if (trailer == null)
			return;
		
		if (trailer.Exists)
			HandleTrailerAttached(vehicle, trailer);
		else
			HandleTrailerDetached(vehicle);
	}

	private void HandleTrailerAttached(Vehicle vehicle, Vehicle trailer)
	{
		_vehiclesLastTrailers[vehicle] = trailer;
		_attachedHandler.Invoke(vehicle, trailer);
	}

	private void HandleTrailerDetached(Vehicle vehicle)
	{
		if (!_vehiclesLastTrailers.ContainsKey(vehicle))
		{
			return;
		}

		var trailer = _vehiclesLastTrailers[vehicle];
		_vehiclesLastTrailers.Remove(vehicle);

		_detachedHandler.Invoke(vehicle, trailer);
	}
}

VehicleExtensions.cs

public static class VehicleExtensions
{
	public static Client GetDriver(this Vehicle vehicle) =>
		NAPI.Pools.GetAllPlayers().FirstOrDefault(p => p.Vehicle == vehicle);

	public static VehicleHash? GetModelHash(this Vehicle vehicle)
	{
		if (vehicle?.Model == null)
			return null;

		if (!Enum.TryParse<VehicleHash>(vehicle.Model.ToString(), out var parsedHash))
			return null;

		return parsedHash;
	}

	public static bool TrailerIsBeingTrailered(this Vehicle vehicle)
	{
		var vehicleTraileringThisTrailer = NAPI.Pools.GetAllVehicles().FirstOrDefault(vehicleInServer => vehicleInServer.Trailer == vehicle &&
vehicleInServer.Trailer != vehicleInServer);
		return vehicleTraileringThisTrailer != null;
	}
}