public Car(int xPos, int yPos, City city, Passenger passenger)
{
XPos = xPos;
YPos = yPos;
City = city;
Passenger = passenger;
}
public override void MoveLeft(Passenger prospectivePassenger)
{
if (MoveInXDirection(prospectivePassenger, MaxSpacesCanMove, false))
{
WritePositionToConsole();
}
}
public override void MoveUp(Passenger prospectivePassenger)
{
if (MoveInYDirection(prospectivePassenger, MaxSpacesCanMove, true))
{
WritePositionToConsole();
}
}
/// <summary>
/// Takes one action (move the car one spot or pick up the passenger).
/// </summary>
/// <param name="car">The car to move</param>
/// <param name="passenger">The passenger to pick up</param>
private static async Task TickAsync(Car car, Passenger passenger)
{
var hasCarMoved = false;
DirectionToMove directionToMove = GetDirectionToMove(car, passenger);
switch (directionToMove)
{
case DirectionToMove.DoNothing:
break;
case DirectionToMove.Left:
car.MoveLeft(passenger);
hasCarMoved = true;
break;
case DirectionToMove.Right:
car.MoveRight(passenger);
hasCarMoved = true;
break;
case DirectionToMove.Up:
car.MoveUp(passenger);
hasCarMoved = true;
break;
case DirectionToMove.Down:
car.MoveDown(passenger);
hasCarMoved = true;
break;
case DirectionToMove.Arrived:
if (!car.HasPassenger)
{
passenger.GetInCar(car);
}
else
{
passenger.GetOutOfCar();
}
break;
default:
throw new ArgumentOutOfRangeException();
}
if (hasCarMoved)
{
Console.WriteLine("\tCar moved, downloading 2PointB Website");
var downloadedBytes = await Task.Run(() => Get2PointBWebsiteInBytesAsync());
}
}
public Car Create(CarType type, int xPos, int yPos, City city, Passenger passenger)
{
Car car;
switch (type)
{
case CarType.Sedan:
car = new Sedan(xPos, yPos, city, passenger);
break;
case CarType.RaceCar:
car = new RaceCar(xPos, yPos, city, passenger);
break;
case CarType.Motorcycle:
car = new Motorcycle(xPos, yPos, city, passenger);
break;
default:
throw new ArgumentOutOfRangeException(nameof(type), type, null);
}
return car;
}
public bool MoveInXDirection(Passenger prospectivePassenger, int numOfSpaces, bool isRight)
{
if (numOfSpaces > 0)
{
var oldXPos = XPos;
if (isRight)
{
var possibleIndex = YPos * City.YMax + (XPos + numOfSpaces);
if (XPos + numOfSpaces <= City.XMax
&& XPos + numOfSpaces <= GetTargetXPos(prospectivePassenger))
{
XPos += numOfSpaces;
UpdateCityPosition(oldXPos, YPos);
return true;
}
}
else
{
var possibleIndex = YPos * City.YMax + (XPos - numOfSpaces);
if (XPos - numOfSpaces >= 0
&& XPos - numOfSpaces >= GetTargetXPos(prospectivePassenger))
{
XPos -= numOfSpaces;
UpdateCityPosition(oldXPos, YPos);
return true;
}
}
return MoveInXDirection(prospectivePassenger, numOfSpaces - 1, isRight);
}
return false;
}
public abstract void MoveDown(Passenger prospectivePassenger);
public int GetTargetYPos(Passenger prospectivePassenger)
{
return HasPassenger
? Passenger.DestinationYPos
: prospectivePassenger.StartingYPos;
}
public void PickupPassenger(Passenger passenger)
{
Passenger = passenger;
}
public abstract void MoveRight(Passenger prospectivePassenger);
public bool MoveInYDirection(Passenger prospectivePassenger, int numOfSpaces, bool isDown)
{
if (numOfSpaces > 0)
{
var oldYPos = YPos;
if (isDown)
{
var possibleIndex = (YPos + numOfSpaces) * City.YMax + XPos;
if (YPos + numOfSpaces <= City.YMax
&& YPos + numOfSpaces <= GetTargetYPos(prospectivePassenger))
{
YPos += numOfSpaces;
UpdateCityPosition(XPos, oldYPos);
return true;
}
}
else
{
var possibleIndex = (YPos - numOfSpaces) * City.YMax + XPos;
if (YPos - numOfSpaces >= 0
&& YPos - numOfSpaces >= GetTargetYPos(prospectivePassenger))
{
YPos -= numOfSpaces;
UpdateCityPosition(XPos, oldYPos);
return true;
}
}
return MoveInYDirection(prospectivePassenger, numOfSpaces - 1, isDown);
}
return false;
}
public Sedan(int xPos, int yPos, City city, Passenger passenger)
: base(xPos, yPos, city, passenger)
{
}
public RaceCar(int xPos, int yPos, City city, Passenger passenger)
: base(xPos, yPos, city, passenger)
{
}
private static DirectionToMove GetDirectionToMove(Car car, Passenger passenger)
{
int targetXPos = car.GetTargetXPos(passenger);
int targetYPos = car.GetTargetYPos(passenger);
int distanceXPos = Math.Abs(targetXPos - car.XPos);
int distanceYPos = Math.Abs(targetYPos - car.YPos);
if (distanceXPos == 0 && distanceYPos == 0)
{
return DirectionToMove.Arrived;
}
if (distanceYPos > distanceXPos)
{
return car.YPos > targetYPos
? DirectionToMove.Down
: DirectionToMove.Up;
}
return car.XPos > targetXPos
? DirectionToMove.Left
: DirectionToMove.Right;
}
public Motorcycle(int xPos, int yPos, City city, Passenger passenger)
: base(xPos, yPos, city, passenger)
{
}
public Passenger AddPassengerToCity(int startXPos, int startYPos, int destXPos, int destYPos)
{
Passenger passenger = new Passenger(startXPos, startYPos, destXPos, destYPos, this);
CityPositions[startYPos * YMax + startXPos].Passenger = passenger;
CityPositions[destYPos * YMax + destXPos].IsDestinationPosition = true;
Passenger = passenger;
return passenger;
}
