def post(self, game_id, player_id):
"""
Input:
{
"column" : 2
}
Output:
{
"move": "{gameId}/moves/{move_number}"
}
Status codes:
• 200 - OK. On success
• 400 - Malformed input. Illegal move
• 404 - Game not found or player is not a part of it.
• 409 - Player tried to post when it’s not their turn.
• 410 - Game is already in DONE state. (additional requirement, noticed while testing)
"""
args = moves_post_parser.parse_args()
request_column = args['column']
# get the game object
try:
g = GameModel.objects(id=game_id).get()
except (DoesNotExist, ValidationError):
abort(404, message=f"Game {game_id} not found.")
# check if player is part of the game
try:
p = g.players.get(name=player_id)
except DoesNotExist:
abort(
404,
message=f"Player {player_id} does not belong to game {game_id}."
)
# check if game is already DONE
if g.state == 'DONE':
abort(410, message=f"The game is already DONE.")
# check if it's player's turn
if g.current_token != p.token:
abort(
409,
message=
f"Player {player_id} tried to post when it’s not their turn.")
# build GameBoard
gb = GameBoard(g.num_cols, g.num_rows)
players_to_token_map = {p.name: p.token for p in g.players}
moves = [{
'token': players_to_token_map[m.player_name],
'column': m.column
} for m in g.moves if m.move_type == 'MOVE']
gb.apply_moves(moves)
# test if next move is legal
if not gb.can_drop(request_column):
abort(
400,
message=
f"Illegal move. Unable to drop token in column {request_column}"
)
# apply move and check winning condition
row = gb.drop_token(request_column, p.token)
if gb.check_win(request_column, row):
g.state = 'DONE'
g.winner = p.name
# can also be done if board is full
elif g.moves.count() + 1 == g.num_cols * g.num_rows:
g.state = 'DONE'
g.winner = None
move_number = len(moves) + 1
g.moves.create(turn=move_number,
move_type='MOVE',
player_name=p.name,
column=request_column)
token_list = list(players_to_token_map.values())
g.current_token = get_next_token(token_list, p.token)
# TODO: possibly use conditional save here, to make sure we're updating the latest tamestamp seen
g.save()
# success
return {
"move": f"{game_id}/moves/{move_number}"
} # TODO: use @marshal_with, fields.Url('endpoint_resource')
def test_cannot_drop_token_into_nonexisting_column():
nc, nr = 1, 3
game = GameBoard(nc, nr)
assert not game.can_drop(0)
def test_can_drop_token_into_almost_full_column():
nc, nr = 1, 3
game = GameBoard(nc, nr)
game.board[0] = [1, 1, None]
assert game.can_drop(1)
def test_cannot_drop_token_into_full_column():
nc, nr = 1, 3
game = GameBoard(nc, nr)
game.board[0] = [1, 1, 1]
assert not game.can_drop(1)
def test_can_drop_token_into_empty_column():
nc, nr = 1, 3
game = GameBoard(nc, nr)
assert game.can_drop(1)