/// <summary>
/// Executes one command
/// </summary>
/// <param name="command"></param>
/// <returns>If the command doesn't fail</returns>
private bool Move(Commands command)
{
switch (command)
{
case Commands.A:
/* Check if we have to increase/decrease X or Y coordinate. */
int x = this.CurrentCardinalPoint == CardinalPoint.West ? -1 : this.CurrentCardinalPoint == CardinalPoint.East ? 1 : 0;
int y = this.CurrentCardinalPoint == CardinalPoint.South ? -1 : this.CurrentCardinalPoint == CardinalPoint.North ? 1 : 0;
Coordinates toAdd = new Coordinates(x, y);
Coordinates newCoordinates = this.CurrentCoordinates.Add(toAdd);
if (this.squareSize.IsWithinBounds(newCoordinates))
{
this.CurrentCoordinates = newCoordinates;
return(true);
}
return(false);
case Commands.L:
this.CurrentCardinalPoint = this.CurrentCardinalPoint.Rotate(CardinalPoint.Rotation.CounterClockwise);
return(true);
case Commands.R:
this.CurrentCardinalPoint = this.CurrentCardinalPoint.Rotate(CardinalPoint.Rotation.Clockwise);
return(true);
default:
return(false);
}
}
public static CardinalPoint ParseCardinalPoint(string cardinalPointLine)
{
if (!CardinalPoint.TryParse(cardinalPointLine, out CardinalPoint parsed))
{
throw new ArgumentException($"The orientation must be one of the following values ({string.Join(", ", CardinalPoint.All.Select(cp => cp.ToString()))})!");
}
return(parsed);
}
public RoverController(Size squareSize, Coordinates initialCoordinates, CardinalPoint initialOrientation)
{
if (squareSize.IsEmpty)
{
throw new ArgumentOutOfRangeException(nameof(squareSize), "Can't be 0, 0");
}
if (initialCoordinates.X < 0 || initialCoordinates.Y < 0)
{
throw new ArgumentOutOfRangeException(nameof(initialCoordinates), "Should be 0 or positive.");
}
this.squareSize = squareSize;
this.CurrentCoordinates = initialCoordinates;
this.CurrentCardinalPoint = initialOrientation;
}
public static void Main()
{
Console.WriteLine("Welcome to the Rover Controller!");
try
{
/* Ask for the initial values */
string sizeLine = ReadLine("Enter the size of the square (Width Height):");
Size size = ParseSize(sizeLine);
string coordinatesLine = ReadLine("Enter the initial coordinates (X, Y):");
Coordinates coordinates = ParseCoordinates(coordinatesLine);
string cardinalPointLine = ReadLine($"Enter the initial orientation ({string.Join(", ", CardinalPoint.All.Select(cp => cp.ToString()))}):");
CardinalPoint cardinalPoint = ParseCardinalPoint(cardinalPointLine);
RoverController controller = new RoverController(size, coordinates, cardinalPoint);
/* Ask for commands until empty line. */
string commandLine = null;
string commandLineMessage = $"Enter one or more commands without any separation ({string.Join(", ", Enum.GetValues<Commands>())}):";
while (!string.IsNullOrEmpty(commandLine = ReadLine(commandLineMessage)))
{
Commands[] commands = ParseCommands(commandLine);
if (!controller.Handle(commands))
{
Console.WriteLine($"False, {controller.CurrentCardinalPoint}, {controller.CurrentCoordinates}.");
return;
}
}
Console.WriteLine($"True, {controller.CurrentCardinalPoint}, {controller.CurrentCoordinates}.");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
