/// <summary>
/// Displays the turtles and tracks of the specific draw board in the console.
/// </summary>
/// <param name="board">The draw board where the turtles and tracks are stored.</param>
/// <exception cref="ArgumentNullException">
/// If board is null.
/// </exception>
public void Visit(DrawBoard board)
{
if (board == null)
{
throw new ArgumentNullException();
}
Console.Clear();
for (int i = 0; i < board.TrackPositions.Count; i++)
{
Console.SetCursorPosition(board.TrackPositions[i].Left, board.TrackPositions[i].Top);
Console.ForegroundColor = board.GetTrackColor(board.TrackPositions[i]);
Console.Write($"{board.GetTrackChar(board.TrackPositions[i])}");
}
for (int i = 0; i < board.Turtles.Count; i++)
{
Console.SetCursorPosition(board.Turtles[i].Position.Left, board.Turtles[i].Position.Top);
Console.ForegroundColor = ConsoleColor.White;
Console.Write($"{board.Turtles[i].TurtleSymbol}");
}
}
/// <summary>
/// This method ensures that the turtle is inside the draw board and stores the tracks and the turtle in the draw board.
/// </summary>
/// <param name="board">The object that should be visited.</param>
/// <exception cref="ArgumentNullException">
/// If board is null.
/// </exception>
public void Visit(DrawBoard board)
{
if (board == null)
{
throw new ArgumentNullException();
}
Position position = this.Position;
if (this.Position.Top < 0)
{
position = new Position(this.Position.Left, 0);
if (int.TryParse(this.Turtle.Commands[0].GetValue(), out int value))
{
if (value > 1)
{
this.Turtle.Commands.RemoveAt(0);
}
}
}
else if (this.Position.Top > board.Height)
{
position = new Position(this.Position.Left, board.Height);
if (int.TryParse(this.Turtle.Commands[0].GetValue(), out int value))
{
if (value > 1)
{
this.Turtle.Commands.RemoveAt(0);
}
}
}
else if (this.Position.Left < 0)
{
position = new Position(0, this.Position.Top);
if (int.TryParse(this.Turtle.Commands[0].GetValue(), out int value))
{
if (value > 1)
{
this.Turtle.Commands.RemoveAt(0);
}
}
}
else if (this.Position.Left > board.Width)
{
position = new Position(board.Width, this.Position.Top);
if (int.TryParse(this.Turtle.Commands[0].GetValue(), out int value))
{
if (value > 1)
{
this.Turtle.Commands.RemoveAt(0);
}
}
}
this.Position = position;
if (this.Draw == true)
{
board.SetTrackChar(this.Position, this.TrackSymbol);
board.SetTrackColor(this.Position, this.TrackColor);
}
if (!board.Turtles.Contains(this))
{
board.Turtles.Add(this);
}
}
