async def add_game(request, persistence):
"""
Create a new game.
The user will become the moderator of the game.
"""
json = await request.json(loads=loads_or_empty)
try:
available_cards = json['cards']
except KeyError:
return json_response({'error': 'No card set provided.'}, status=400)
moderator_name = json.get('moderator_name', '')
if moderator_name == '':
return json_response({'error': 'Moderator name not provided.'}, status=400)
if len(available_cards) < 2:
return json_response({'error': 'Cannot play with less than 2 cards.'}, status=400)
moderator_session = await get_session(request)
# Get or assign the moderator id:
moderator_id = get_or_assign_id(moderator_session)
game_id = get_random_id()
persistence.add_game(game_id, moderator_id, moderator_name, coerce_cards(available_cards))
return json_response({'game_id': game_id, 'game': persistence.serialize_game(game_id)})
def get_or_assign_id(session: Session) -> str:
"""Return client's ID, and if it doesn't exist, assign it and return."""
client_id = session.setdefault(CLIENT_ID_KEY, get_random_id())
return client_id
