@staticmethod

def alter_tile(tile, direction, up):

for rowIndex, row in enumerate(tile.layout):

for squareIndex, square in enumerate(row):

if(square == 0):

if(up):

return Mover.move_vertically(tile, direction, rowIndex, squareIndex)

else:

return Mover.move_horizontally(tile, direction, rowIndex, squareIndex)

@staticmethod

def move_vertically(tile, direction, rowIndex, squareIndex):

if(rowIndex == direction + 1):

return None

return Tile.swap(Tile.duplicate(tile), rowIndex + direction, squareIndex, rowIndex, squareIndex)

@staticmethod

def move_horizontally(tile, direction, rowIndex, squareIndex):

if(squareIndex == direction + 1):

return None

return Tile.swap(Tile.duplicate(tile), rowIndex, squareIndex + direction, rowIndex, squareIndex)

@staticmethod

def move_down(tile):

return Mover.alter_tile(tile, direction=1, up=True)

@staticmethod

def move_up(tile):

return Mover.alter_tile(tile, direction=-1, up=True)

@staticmethod

def move_right(tile):

return Mover.alter_tile(tile, direction=1, up=False)

@staticmethod

def move_left(tile):

return Mover.alter_tile(tile, direction=-1, up=False)

@staticmethod

def possible_moves(tile):

moves = [

Mover.move_up(tile),

Mover.move_left(tile),

Mover.move_right(tile),

Mover.move_down(tile),

]

return [item for item in moves if item != None ]