def deserialize(self, objStr, gameInst=None):
obj = json.loads(objStr.decode('UTF8'))
self.key = obj["key"]
#self.knownGameState = obj["knownGameState"]
if gameInst is not None:
self.game = gameInst
else:
if obj['gameKey'] is not None and Db.instance().keyExists(obj["gameKey"]):
self.game = Game(obj["gameKey"])
else:
self.game = None
def findNew(player):
db = Db.instance()
game = None
# check if there are any games waiting for second player
if db.lenList(GAME_WAITING_QUEUE) > 0:
# if there are, remove one from queue
gameKey = db.listPopLeft(GAME_WAITING_QUEUE)
game = Game(gameKey)
else:
# if not, create new game and append it to waiting list
game = Game()
game.state = GameState.searchingPlayers
db.listAppend(GAME_WAITING_QUEUE, game.key)
game.addPlayer(player)
game.update()
return game
def cleanup():
"""
This function should run in separate greenlet with some time interval.
It iterates through games queue and checks if they have at least one player.
If they dont, it removes given games from list
"""
db = Db.instance()
numCleaned = 0
gamesQueue = db.retrieveList(GAME_WAITING_QUEUE)
if gamesQueue is None:
return
for gameKey in gamesQueue:
game = Game(gameKey)
if len(game.players) == 0:
db.removeFromList(GAME_WAITING_QUEUE, gameKey)
numCleaned += 1
return numCleaned
def __init__(self, playerId=None, gameInst=None, knownGameState=0):
self.key = playerId # app-wide unique key
if knownGameState is not None:
self.knownGameState = knownGameState # increments as player receives updates
else:
self.knownGameState = 0
self.game = None # the game this player currently bound to
db = Db.instance()
# Generate key if needed
if self.key is None:
self.key = db.generateKey()
# Check if player with such key exists. If he does, retrieve his
# info from db. If he does not, create him
if db.keyExists(self.key):
self.deserialize(db.retrieve(self.key), gameInst)
else:
db.store(self.key, self.serialize())
def __init__(self, key=None):
self.key = key
self.players = [] # player[0] is 'o', player[1] is 'x'
self.activePlayer = None # whose turn is now?
self.grid = ['' for _ in range(9)] # 3x3 game grid
# This variable is needed to keep in sync with both players. It is
# incremented each time game state is updated (e.g. player makes a move).
# Each player stores his value of stateFrame, so if player's copy is
# less than game's, his game state is considered outdated
self.stateFrame = 0
self.winner = None
self.state = GameState.idle
db = Db.instance()
if self.key is None or db.retrieve(self.key) is None:
self.key = db.generateKey()
else:
self.deserialize(db.retrieve(self.key))
self.checkIfPlayersActive()
def dbSave(self):
"""
This method is called whenever player state needs to be saved in database
"""
Db.instance().store(self.key, self.serialize())
def dbSave(self):
Db.instance().store(self.key, self.serialize())
