/// <summary>
/// This function actually executes the command by rotating the robot based on given direction
/// Position doesn't need to validated as long as the robot is already placed on the Grid/Board
/// </summary>
/// <param name="robot"></param>
/// <returns></returns>
public virtual CommandFeedback Impact(Robot robot)
{
//robot must be positioned first
if (!robot.IsPositioned)
{
return(new CommandFeedback
{
IsSuccess = false,
NewPosition = robot.Position,
ErrorCode = CommandErrorCode.RobotNotPositioned
});
}
var result = robot.ChangeDirection(Direction);
var feeback = new CommandFeedback
{
RobotId = robot.RobotId,
IsSuccess = result,
NewPosition = robot.Position
};
if (!result)
{
feeback.ErrorCode = CommandErrorCode.RotationException;
}
return(feeback);
}
/// <summary>
/// This function is the one that move our robot in the direction it is facing
/// which implies robot must be placed in a specific position first.
/// </summary>
/// <param name="robot"></param>
/// <param name="position"></param>
/// <returns></returns>
public virtual CommandFeedback Impact(Robot robot, Position position = null)
{
//robot must be position first before moving it
if (!robot.IsPositioned)
{
return(new CommandFeedback
{
IsSuccess = false,
NewPosition = robot.Position,
ErrorCode = CommandErrorCode.RobotNotPositioned
});
}
//let's make a clone of our robot so we don't move the original to the wrong postion
var originalPosition = (Position)robot.Position.Clone();
//make robot has been positioned
switch (originalPosition.Direction)
{
case Face.North:
originalPosition.Y++;
break;
case Face.East:
originalPosition.X++;
break;
case Face.South:
originalPosition.Y--;
break;
case Face.West:
originalPosition.X--;
break;
}
//validate move
var success = Board.IsValidPosition(originalPosition);
if (success)
{
robot.Position = originalPosition;
}
var feedback = new CommandFeedback
{
RobotId = robot.RobotId,
IsSuccess = success,
NewPosition = robot.Position
};
if (!feedback.IsSuccess)
{
feedback.ErrorCode = CommandErrorCode.MoveOutOfBounds;
}
return(feedback);
}
