def _get_username(self, username, password):
try:
self._validate_username(username)
self._validate_password(password)
username, encrypted_password = \
Source.get_user_credentials(username)
except (FileNotFoundError, ValueError):
self.register(username, password)
except PrimesError:
raise
else:
if encrypted_password != Session.encrypt(password):
raise PrimesError(_('Invalid password'))
return username
def __init__(self, username, password):
self.username = self._get_username(username, password)
self.start_time = datetime.datetime.now()
self.data_source = Source(self.username)
def register(name, password):
Source.add_user(name, Session.encrypt(password))
class Session:
USERNAME_LENGTH = 3
MESSAGE_LENGTH = 200
@staticmethod
def encrypt(password):
return hashlib.sha1(bytes(password, 'utf8')).hexdigest()
@staticmethod
def _validate_username_len(username):
if len(username) < Session.USERNAME_LENGTH:
raise PrimesError(_('Invalid name'))
@staticmethod
def _validate_username(username):
Session._validate_username_len(username)
if '.' in username:
raise PrimesError(_('Invalid name'))
@staticmethod
def _validate_password(password):
if not password:
raise PrimesError(_('Empty password'))
@staticmethod
def _validate_message(message):
if not 0 < len(message) <= Session.MESSAGE_LENGTH:
raise PrimesError(_('Invalid message'))
@staticmethod
def register(name, password):
Source.add_user(name, Session.encrypt(password))
def _get_username(self, username, password):
try:
self._validate_username(username)
self._validate_password(password)
username, encrypted_password = \
Source.get_user_credentials(username)
except (FileNotFoundError, ValueError):
self.register(username, password)
except PrimesError:
raise
else:
if encrypted_password != Session.encrypt(password):
raise PrimesError(_('Invalid password'))
return username
def __init__(self, username, password):
self.username = self._get_username(username, password)
self.start_time = datetime.datetime.now()
self.data_source = Source(self.username)
def __str__(self):
return self.username
def send_message(self, receiver, message):
Session._validate_username_len(receiver)
Session._validate_message(message)
self.data_source.add_message(receiver, message)
def read_messages(self):
return self.data_source.get_unread_messages()
def new_messages(self):
return self.data_source.is_new_messages()