public void move(string direction)
{
Position currentHeadPosition = body[0];
Position newHeadPosition = null;
switch (direction)
{
case "UP":
if (currentHeadPosition.getRowNo() > mainBoard.getMinRowNo())
{
newHeadPosition = new Position(currentHeadPosition.getRowNo() - 1, currentHeadPosition.getColNo());
}
break;
case "DOWN":
if (currentHeadPosition.getRowNo() < mainBoard.getMaxRowNo())
{
newHeadPosition = new Position(currentHeadPosition.getRowNo() + 1, currentHeadPosition.getColNo());
}
break;
case "LEFT":
if (currentHeadPosition.getColNo() > mainBoard.getMinColNo())
{
newHeadPosition = new Position(currentHeadPosition.getRowNo(), currentHeadPosition.getColNo() - 1);
}
break;
case "RIGHT":
if (currentHeadPosition.getColNo() < mainBoard.getMaxColNo())
{
newHeadPosition = new Position(currentHeadPosition.getRowNo(), currentHeadPosition.getColNo() + 1);
}
break;
default:
//Do nothing
break;
}
if (newHeadPosition != null)
{
body.Insert(0, newHeadPosition); //Add a new head positon 0
body.RemoveAt(body.Count - 1); //Remove the last position
}
}