/// <exception cref="System.Exception">Throws when specified robot does not exist</exception>
public void Left(Guid robotId)
{
var robot = Robots.FirstOrDefault(r => r.RobotId == robotId);
if (robot == null)
{
throw new Exception("Robot for specified id does not exist");
}
robot.Left();
}
/// <summary>place a robot with a given id and direction on the board </summary>
/// <exception cref="System.Exception">Throws when allowed robot limit is reached </exception>
/// <exception cref="System.Exception">Throws when x and y position are invalid </exception>
public void Place(Guid robotId, int x, int y, Direction direction)
{
var robot = Robots.FirstOrDefault(r => r.RobotId == robotId);
if (robot == null)
{
if (Robots.Count >= NumberOfRobotsAllowed)
{
throw new Exception("Unable to place any more robots on the board as you have reached the allowed limit");
}
robot = new Robot.Robot(direction, robotId);
Robots.Add(robot);
}
else
{
robot.Direction = direction;
}
_board.Place(robotId, x, y);
}
private void OnDetectedRobotChanged(object sender, NotifyCollectionChangedEventArgs e)
{
//実装側がそういうシステムなので基本的にAdd/Removeのどちらか片方しか生じない
if (e.Action == NotifyCollectionChangedAction.Add)
{
foreach (var robot in e.NewItems.OfType <DetectedRobot>())
{
Robots.Add(CreateDetectedRobotViewModel(robot));
}
}
else if (e.Action == NotifyCollectionChangedAction.Remove)
{
foreach (var robot in e.NewItems.OfType <DetectedRobot>())
{
var target = Robots.FirstOrDefault(r => r.HasRobot(robot));
if (target != null)
{
Robots.Remove(target);
}
}
}
}
/// <exception cref="System.Exception">Throws when specified robot does not exist</exception>
/// <exception cref="System.Exception">Throws when moving to invalid location</exception>
public void Move(Guid robotId)
{
var robot = Robots.FirstOrDefault(r => r.RobotId == robotId);
if (robot == null)
{
throw new Exception("Robot for specified id does not exist, place robot on the board again");
}
var currentCoords = _board.PlayArea.IndexOf(robotId);
if (currentCoords == (-1, -1))
{
throw new Exception("Cannot find robot on the board, place same robot on the board again");
}
var deltaCoords = robot.Move();
var newX = currentCoords.x + deltaCoords.x;
var newY = currentCoords.y + deltaCoords.y;
_board.Place(robotId, newX, newY);
}
public Robot GetRobot(string robotId)
{
return(Robots.FirstOrDefault(r => r.RobotId == robotId));
}
