possibleMovements method

Implementation

@override
List<List<int>> possibleMovements(int x, int y, List<List<Piece>> board,
    bool reversedBoard, List<List<int>> lastMovement) {
  List<List<int>> movements = [];
  int aux1 = 0, aux2 = 0;
  aux1 = !reversedBoard ? (super.isWhite ? -1 : 1) : (super.isWhite ? 1 : -1);

  if (board[y + aux1][x].isEmpty()) movements.add([y + aux1, x]);
  if (x < 7 &&
      board[y + aux1][x + 1].color() != isWhite &&
      !board[y + aux1][x + 1].isEmpty()) {
    movements.add([y + aux1, x + 1]);
  }
  if (x > 0 &&
      board[y + aux1][x - 1].color() != isWhite &&
      !board[y + aux1][x - 1].isEmpty()) {
    movements.add([y + aux1, x - 1]);
  }
  aux2 = !reversedBoard ? (super.isWhite ? -2 : 2) : (super.isWhite ? 2 : -2);
  if ((!reversedBoard &&
          (super.isWhite && y == 6 || !super.isWhite && y == 1)) ||
      (reversedBoard &&
          (super.isWhite && y == 1 || !super.isWhite && y == 6))) {
    if (board[y + aux2][x].isEmpty() && board[y + aux1][x].isEmpty()) {
      movements.add([y + aux2, x]);
    }
  }
  //comer al paso
  if (lastMovement !=
          [
            [-1, -1],
            [-1, -1]
          ] &&
      (lastMovement[0][0] - lastMovement[1][0]).abs() > 1 &&
      ((x < 7 &&
              lastMovement[0][1] == x + 1 &&
              board[y][x + 1] is Pawn &&
              board[y][x + 1].color() != isWhite) ||
          (x > 0 &&
              lastMovement[0][1] == x - 1 &&
              board[y][x - 1] is Pawn &&
              board[y][x - 1].color() != isWhite))) {
    movements.add([y + aux1, lastMovement[0][1]]);
  }

  return movements;
}