def place_pawn(self, pawn: GridPawn, coord: Coord):
'''Places a pawn on the grid at position coord if the coordinate is free'''
coord = self._get_coord(coord)
if not self.coord_occupied(coord):
if pawn in self.grid_pawns:
raise Exception(
'Pawn is already in the grid; move it with move_pawn')
else:
self.grid_pawns.append(pawn)
self.occupied_coords.append(coord)
coord.set_occupied(True)
coord.occupied_val = pawn
return coord
else:
raise CoordOutOfBoundsException(
'Coordinate {} is already occupied.'.format(coord.__str__()))
def move_pawn(self, pawn: GridPawn, coord: Coord):
'''Moves a pawn that has already been placed on the grid to a new position'''
if pawn in self.grid_pawns:
coord = self._get_coord(coord)
if not self.coord_occupied(coord):
self.__log.info('moving pawn {} to coordinate {}'.format(
pawn.__str__(), coord.__str__()))
pawn.current_coord.set_occupied(False)
pawn.current_coord.occupied_val = None
self.occupied_coords.remove(pawn.current_coord)
self.occupied_coords.append(coord)
coord.set_occupied(True)
coord.occupied_val = pawn
return coord
else:
raise CoordOccupiedException(
'Coord {} is already occupied, cannot move pawn'.format(
coord.__str__()))
else:
raise Exception(
'Please place pawn on the grid first using place_pawn')
