def wants_to_not_be_friends_with(origin_username, destiny_username):
"""Declares an intention from origin to not be friends with destiny, being that a rejection
of a previously received friendship request or the deletion of an existing friendship.
Returns a FriendshipState which can be request_received or friends depending on the previous
state."""
Logger(__name__).info(
'Username {} wants to NOT be friends with {}.'.format(
origin_username, destiny_username))
# retrieve the DB user representations
origin_user = User._get_one({'username': origin_username})
destiny_user = User._get_one({'username': destiny_username})
# if one of them was not found raise exception
if origin_user is None or destiny_user is None:
raise UserNotFoundException
# if origin doesnt know destiny or origin was the one requesting raise exception
if destiny_username not in origin_user['friends'] or \
origin_user['friends'][destiny_username] == FRIENDSHIP_STATE_SENT:
raise NotFriendsException
# if here they were already friends or destiny had sent request to origin, so delete
assert Friendship._are_friends(origin_username, destiny_username) or \
Friendship._had_sent_request(destiny_username, origin_username)
return Friendship._reject_friendship(origin_username, destiny_username)
def wants_to_be_friends_with(origin_username, destiny_username):
"""Declares an intention from origin to be friends with destiny, sending a request to
destiny or confirming the relation if the inverse had been previously stated.
Returns a FriendshipState which can be request_sent or friends depending on the previous."""
Logger(__name__).info(
'Username {} wants to be friends with {}.'.format(
origin_username, destiny_username))
# retrieve the DB user representations
origin_user = User._get_one({'username': origin_username})
destiny_user = User._get_one({'username': destiny_username})
# if one of them was not found raise exception
if origin_user is None or destiny_user is None:
raise UserNotFoundException
# if destiny had NOT already wanted to be friends with origin
if origin_username not in destiny_user['friends']:
return Friendship._send_request_from_to(origin_username,
destiny_username)
# if destiny is already friends with origin
if Friendship._are_friends(origin_username, destiny_username):
raise AlreadyFriendsException
# only other cases are: invitation already sent or needed confirmation
# and this first case should not be possible
assert _user(destiny_username
)['friends'][origin_username] == FRIENDSHIP_STATE_SENT
assert _user(origin_username)['friends'][
destiny_username] == FRIENDSHIP_STATE_RECEIVED
# so now it should be confirmed
return Friendship._confirm_friends(origin_username, destiny_username)
