public Game(ConnectFourPlayer player1, ConnectFourPlayer player2)
{
_player1 = player1;
CurrentPlayer = player1;
_player2 = player2;
PlayedStones = new Tile?[7, 6];
_playedStonesCount = 0;
}
public void PlayStone(ConnectFourPlayer player, int x)
{
if (!Started)
{
throw new GameNotStartedException();
}
if (Finished)
{
throw new GameAlreadyFinishedException();
}
if (player != CurrentPlayer)
{
throw new NotPlayersTurnException();
}
if (x < 0 || x > 6)
{
throw new PlayNotAllowedException();
}
var y = GetYForX(x);
if (y < 0 || y > 5)
{
throw new PlayNotAllowedException();
}
PlayedStones[x, y] = new Tile(x, y, player.Color);
_playedStonesCount++;
Finished = IsFinished(x, y, player);
if (Finished)
{
Winner = CurrentPlayer;
}
if (IsBoardFull())
{
Finished = true;
}
CurrentPlayer = CurrentPlayer == _player1 ? _player2 : _player1;
}
public WhenPlayingAFourInARowGame()
{
_player1 = new ConnectFourPlayer("p1", TileColor.Red);
_player2 = new ConnectFourPlayer("p2", TileColor.Yellow);
}
private bool IsFinished(int x, int y, ConnectFourPlayer player)
{
var inARow = 1;
var lastChecked = (x, y);
// horizontal to the left
while (lastChecked.x - 1 >= 0 && PlayedStones[lastChecked.x - 1, y]?.Color == player.Color)
{
inARow++;
lastChecked.x--;
if (inARow == 4)
{
return(true);
}
}
// horizontal to the right
lastChecked = (x, y);
while (lastChecked.x + 1 <= 6 && PlayedStones[lastChecked.x + 1, y]?.Color == player.Color)
{
inARow++;
lastChecked.x++;
if (inARow == 4)
{
return(true);
}
}
// reset for vertical
inARow = 1;
lastChecked = (x, y);
while (lastChecked.y - 1 >= 0 && PlayedStones[x, lastChecked.y - 1]?.Color == player.Color)
{
inARow++;
lastChecked.y--;
if (inARow == 4)
{
return(true);
}
}
// reset for diagonally right up
inARow = 1;
lastChecked = (x, y);
while (lastChecked.y + 1 <= 5 && lastChecked.x + 1 <= 6 && PlayedStones[lastChecked.x + 1, lastChecked.y + 1]?.Color == player.Color)
{
inARow++;
lastChecked.y++;
lastChecked.x++;
if (inARow == 4)
{
return(true);
}
}
lastChecked = (x, y);
while (lastChecked.y - 1 >= 0 && lastChecked.x - 1 >= 0 && PlayedStones[lastChecked.x - 1, lastChecked.y - 1]?.Color == player.Color)
{
inARow++;
lastChecked.y--;
lastChecked.x--;
if (inARow == 4)
{
return(true);
}
}
// reset for diagonally right down
inARow = 1;
lastChecked = (x, y);
while (lastChecked.y - 1 >= 0 && lastChecked.x + 1 <= 6 && PlayedStones[lastChecked.x + 1, lastChecked.y - 1]?.Color == player.Color)
{
inARow++;
lastChecked.y--;
lastChecked.x++;
if (inARow == 4)
{
return(true);
}
}
lastChecked = (x, y);
while (lastChecked.y + 1 <= 5 && lastChecked.x - 1 >= 0 && PlayedStones[lastChecked.x - 1, lastChecked.y + 1]?.Color == player.Color)
{
inARow++;
lastChecked.y++;
lastChecked.x--;
if (inARow == 4)
{
return(true);
}
}
return(false);
}
