David Rodenkirchen
84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
from hashlib import sha256
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from typing import Optional
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from string import ascii_letters, digits
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from pymongo.errors import DuplicateKeyError
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from elm.types.User import User
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class NameNotAllowedError(Exception):
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def __init__(self, disallowed_char: str) -> None:
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self.disallowed_char = disallowed_char
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class MailAlreadyInUseError(Exception):
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pass
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class UserService:
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ALLOWED_USER_NAME_SYMBOLS = ascii_letters + digits + "!#$%&*+,-./:;<=>?[]^_{|}~"
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MAX_USERNAME_LENGTH = 14
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def __init__(self) -> None:
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pass
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@staticmethod
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async def get_all_users() -> list[User]:
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return await User.find_all().to_list()
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@staticmethod
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async def get_user(user_name: str) -> Optional[User]:
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return await User.find_one(User.user_name == user_name)
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@staticmethod
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async def get_user_by_mail(mail: str) -> Optional[User]:
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return await User.find_one(User.user_mail == mail.lower())
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@staticmethod
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async def get_user_picture(user_name: str) -> Optional[bytes]:
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user = await User.find_one(User.user_name == user_name)
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if user:
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return user.user_picture
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return None
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@staticmethod
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async def change_user_password(user_name: str, new_password: str) -> bool:
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user = await User.find_one(User.user_name == user_name)
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if not user:
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return False
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user.user_password = sha256(new_password.encode(encoding="utf-8")).hexdigest()
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await user.save()
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return True
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async def create_user(self, user_name: str, user_mail: str, password_clear_text: str) -> User:
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disallowed_char = self._check_for_disallowed_char(user_name)
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if disallowed_char:
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raise NameNotAllowedError(disallowed_char)
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try:
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return await User(
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user_name=user_name,
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user_mail=user_mail.lower(),
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user_password=sha256(password_clear_text.encode(encoding="utf-8")).hexdigest()
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).insert()
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except DuplicateKeyError:
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raise MailAlreadyInUseError
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async def is_login_valid(self, user_name: str, password_clear_text: str) -> bool:
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user = await self.get_user(user_name)
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user_password_hash = sha256(password_clear_text.encode(encoding="utf-8")).hexdigest()
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if not user:
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return False
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if user.user_fallback_password and user.user_fallback_password == user_password_hash:
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return True
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return user.user_password == user_password_hash
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def _check_for_disallowed_char(self, name: str) -> Optional[str]:
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for c in name:
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if c not in self.ALLOWED_USER_NAME_SYMBOLS:
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return c
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return None
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