/// <summary>
/// Rotates the robot in the specified direction by the specified amount
/// </summary>
/// <param name="direction">Direction in which to turn, positive number indicates clockwise, negative number indicates anticlockwise, magnitude is number of turns to rotate</param>
public void Turn(Int32 direction)
{
if (this.Placed == false)
{
//Specialise exception to be TurnException etc depending on needs
//Would normally throw exception, in this case, the command will just be ignored
//throw new Exception("The robot has not been placed.");
return;
}
var currentDirection = Robot.Directions.IndexOf(this.Direction);
var newDirection = (currentDirection + direction) % Robot.Directions.Count;
if (newDirection < 0)
{
newDirection += Robot.Directions.Count;
}
this.Direction = Robot.Directions[newDirection];
}
public Boolean Move(MoveVector vector)
{
if (this.Placed == false)
{
//Specialise exception to be MoveException etc depending on needs
//Would normally throw exception, in this case, the command will just be ignored
//throw new Exception("The robot has not been placed.");
return(false);
}
var newPosition = new TablePosition {
X = this.Position.X,
Y = this.Position.Y
};
newPosition.X += vector.X;
newPosition.Y += vector.Y;
return(this.Table.Move(this, newPosition));
//Check with the table that the position is valid
}
public String Command(String command)
{
if (command.IndexOf(Commands.Place) == 0)
{
if (command.Length < Commands.Place.Length + 1)
{
throw new Exception("No parameters were passed.");
}
String[] placeParams = command.Substring(Commands.Place.Length + 1).Split(',');
var placePosition = new TablePosition();
if (placeParams.Length < 3)
{
throw new Exception("Not enough parameters. Three parameters are required.");
}
try {
placePosition.X = Int32.Parse(placeParams[0]);
} catch {
throw new Exception(placeParams[0] + " is not a valid number.");
}
try {
placePosition.Y = Int32.Parse(placeParams[1]);
} catch {
throw new Exception(placeParams[1] + " is not a valid number.");
}
var direction = Robot.Directions.FirstOrDefault(d => d.Name == placeParams[2]);
if (direction == null)
{
throw new Exception("Could not find direction " + placeParams[2] + ".");
}
if (this.Table.Move(this, placePosition))
{
this.Placed = true;
this.Direction = direction;
}
}
else if (command == Commands.Move)
{
Move(this.Direction);
}
else if (command == Commands.Left)
{
Turn(-1);
}
else if (command == Commands.Right)
{
Turn(1);
}
else if (command == Commands.Report)
{
if (this.Placed == false)
{
throw new Exception("The robot has not been placed.");
}
return(this.Position.X + "," + this.Position.Y + "," + this.Direction.Name);
}
else
{
//Specialise exception to be CommandException etc depending on needs
throw new UnknownCommandException("Command not recognised.");
}
return("");
}
