def in_board(self, coordinate: Coordinate) -> bool:
"""
returns whether a coordinate is within the bounds of the board
arguments:
coordinate -- coordinate to check
"""
return (coordinate.get_rank() >= 0 and coordinate.get_file() >= 0
and coordinate.get_rank() < self.HEIGHT
and coordinate.get_file() < self.WIDTH)
def get_diagonal_moves(self, piece: Piece,
board: List[List[Piece]]) -> List[Move]:
"""
returns a list of all diagonal moves
arguments:
piece -- piece to generate moves
board -- board to validate moves
"""
if piece.piece_type != Type.BISHOP and piece.piece_type != Type.QUEEN:
return []
directions: List[Tuple[int, int]] = [(1, 1), (-1, 1), (-1, -1),
(1, -1)]
moves: List[Move] = []
for direction in directions:
destination: Coordinate = Coordinate(
piece.coordinate.get_rank() + direction[0],
piece.coordinate.get_file() + direction[1],
)
while self.in_board(destination):
moves.append(
Move(piece.coordinate, destination,
self.piece_at(destination, board)))
if self.piece_at(destination, board):
break
destination = Coordinate(
destination.get_rank() + direction[0],
destination.get_file() + direction[1],
)
return moves
def piece_at(self, coordinate: Coordinate,
board: List[List[Piece]]) -> Union[Piece, None]:
"""
returns a reference to the piece at a specified coordinate, if no piece is present returns None
arguments:
coordinate -- coordinate to check
board -- board to check for piece in
"""
if not self.in_board(coordinate):
return None
else:
return board[coordinate.get_rank()][coordinate.get_file()]
