def get_scores(cls):
"""Returns all Scores existing within the application."""
# Check that user is authenticated
get_endpoints_current_user()
scores = Score.query()
return ScoreForms(scores=[score.to_form() for score in scores])
def get_user_rankings(cls, request):
"""
Returns a list of UserRank forms ordered in descending order
by total margin of victory.
"""
# Ensure user is authenticated
get_endpoints_current_user()
users = User.query().order(-User.total_victory_margin)
return UserRankForms(user_ranks=[user.to_rankform() for user in users])
def get_game(cls, request):
"""Returns an existing game in the application"""
# First verify the user is authenticated
get_endpoints_current_user()
game = get_by_urlsafe(request.urlsafe_game_key, Game)
if game:
return game.to_form()
else:
raise endpoints.NotFoundException('Game not found!')
def get_user_scores(cls, request):
"""Returns all Scores associated with the current signed-in User"""
# Check that current user is authenticated
get_endpoints_current_user()
user = User.query(User.email == request.email).get()
if not user:
raise NotFoundException(
'A User with that email address does not exist!')
scores = Score.query(Score.user == user.key)
return ScoreForms(scores=[score.to_form() for score in scores])
def cancel_game(cls, request):
"""
Removes a game that is currently in progress from the system. The game
is specificed by Key, contained in the request, and must belong to the currently
authenticated user.
"""
# Get the current user - making sure it's authenticated
gplus_user = get_endpoints_current_user()
user = User.query(User.email == gplus_user.email()).get()
# Get the game specified by key in the request
game = get_by_urlsafe(request.urlsafe_game_key, Game)
# Ensure the game exists
if not game:
raise endpoints.NotFoundException('Game not found!')
# Ensure the game is associated to the current user
if user.key != game.user:
raise endpoints.ForbiddenException("Cannot cancel another user's game!")
# Ensure the game is not completed
if game.game_over:
raise endpoints.ForbiddenException("Cannot cancel a game that has already been completed!")
# All good to remove the game from datastore
game.key.delete()
def query_current_user(cls):
"""Creates a query for the scores of the current user.
Returns:
An ndb.Query object bound to the current user. This can be used
to filter for other properties or order by them.
"""
current_user = get_endpoints_current_user()
return cls.query(cls.user == current_user)
def query_current_user(cls):
"""Creates a query for the scores of the current user.
Returns:
An ndb.Query object bound to the current user. This can be used
to filter for other properties or order by them.
"""
current_user = get_endpoints_current_user()
return cls.query(cls.user == current_user)
def get_user_games(cls):
"""Returns all of the current User's active games"""
gplus_user = get_endpoints_current_user()
user = User.query(User.email == gplus_user.email()).get()
active_games = Game.query() \
.filter(Game.user == user.key) \
.filter(Game.game_over == False)
return GameForms(games=[game.to_form() for game in active_games])
def get_high_scores(cls, request):
"""
Returns a list of highscores. The scores are ordered
in descending order by the margin of victory. In the request,
the user can specify 'number_of_results' to limit the total
number of scores returned
"""
# Check that the current user is authenticated
get_endpoints_current_user()
# Get number_of_results limit from request
number_of_results = request.number_of_results
if number_of_results < 0:
raise BadRequestException("Number of results field must be greater than 0!")
elif number_of_results == 0:
scores = Score.query().order(-Score.victory_margin)
else:
scores = Score.query().order(-Score.victory_margin).fetch(number_of_results)
return ScoreForms(scores=[score.to_form() for score in scores])
def new_game(cls, request):
"""Creates and returns a new game"""
gplus_user = get_endpoints_current_user()
user = User.query(User.email == gplus_user.email()).get()
if request.total_rounds not in ROUNDS_OPTIONS:
raise endpoints.BadRequestException('Invalid total number of rounds.'
' Must be a number contained in the set: {0}.'.format(ROUNDS_OPTIONS))
game = Game(user=user.key, total_rounds=request.total_rounds, remaining_rounds=request.total_rounds)
game.put()
return game.to_form()
def _get_user_profile():
"""Returns User obj from datastore. Will create new one if non-existent."""
# Ensure user is authenticated with Google+
gplus_user = get_endpoints_current_user()
# Attempt to get User from datastore
user_id = gplus_user.email()
user_key = ndb.Key(User, user_id)
user = user_key.get()
# Create new User in datastore if it doesn't exist
if not user:
user = User(
key=user_key,
displayName=gplus_user.nickname(),
email=gplus_user.email()
)
user.put()
return user
def get_game_history(cls, request):
"""
Returns the round-by-round result of an active or completed Game.
The game must be associated with the current authenticated user.
"""
# Get the current user - making sure it's authenticated
gplus_user = get_endpoints_current_user()
user = User.query(User.email == gplus_user.email()).get()
# Get the game specified by key in the request
game = get_by_urlsafe(request.urlsafe_game_key, Game)
# Ensure the game exists
if not game:
raise endpoints.NotFoundException('Game not found!')
# Ensure the game is associated to the current user
if user.key != game.user:
raise endpoints.ForbiddenException("You may only view the history of your own games!")
return game.to_gamehistory_form()
def from_form(cls, message):
"""Gets the current user and inserts a score.
Args:
message: A ScoreRequestMessage instance to be inserted.
Returns:
The Score entity that was inserted.
"""
current_user = get_endpoints_current_user().key
opponent = User.query(User.name == message.opponent_name)
if message.result == 'WIN':
result = Result.WIN
elif message.result == 'TIE':
result = Result.TIE
else:
result = Result.LOSE
entity = cls(user=current_user, opponent=opponent,
board_state=message.board_state, result=result,
)
entity.put()
return entity
def from_form(cls, message):
"""Gets the current user and inserts a score.
Args:
message: A ScoreRequestMessage instance to be inserted.
Returns:
The Score entity that was inserted.
"""
current_user = get_endpoints_current_user().key
opponent = User.query(User.name == message.opponent_name)
if message.result == 'WIN':
result = Result.WIN
elif message.result == 'TIE':
result = Result.TIE
else:
result = Result.LOSE
entity = cls(
user=current_user,
opponent=opponent,
board_state=message.board_state,
result=result,
)
entity.put()
return entity
def play_round(cls, request):
"""
Simulates a round of Rock Paper Scissors. Returns the current state of the
game following the simulation.
"""
# Make sure user is authenticated
get_endpoints_current_user()
# Grab the Game instance by the key
game = get_by_urlsafe(request.urlsafe_game_key, Game)
if not game:
raise endpoints.NotFoundException('Game not found!')
# Ensure the game is not already completed
if game.game_over:
raise endpoints.BadRequestException('Game already over!')
# Generate random move for the CPU
cpu_move = random.choice(MOVES)
game.cpu_moves.append(cpu_move)
# Game logic to determine winner
user_move = request.move.upper()
if user_move not in MOVES:
raise endpoints.BadRequestException('Player moves must be contained in the set: {0}.'.format(MOVES))
game.user_moves.append(user_move)
is_tie = False
user_move_idx = MOVES.index(user_move)
cpu_move_idx = MOVES.index(cpu_move)
if user_move_idx == cpu_move_idx:
is_tie = True
game.user_won_last_round = None
game.round_results.append(-1)
elif (3 + user_move_idx - cpu_move_idx) % 3 == 1:
game.user_wins += 1
game.user_won_last_round = True
game.round_results.append(1)
else:
game.cpu_wins += 1
game.user_won_last_round = False
game.round_results.append(0)
# Handle ties - Only decrement the rounds remaining when the round is not a tie
if is_tie:
game.total_ties += 1
else:
game.remaining_rounds -= 1
# Add the user and cpu moves to the game state
game.user_last_move = user_move
game.cpu_last_move = cpu_move
# End the game if there is a winner
rounds_to_win = (game.total_rounds / 2) + 1
if game.cpu_wins == rounds_to_win or game.user_wins == rounds_to_win:
cls.end_game(game, game.user_wins > game.cpu_wins)
# Update Game in datastore
game.put()
return game.to_form()
