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""" |
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byceps.services.authentication.service |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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:Copyright: 2006-2021 Jochen Kupperschmidt |
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:License: Revised BSD (see `LICENSE` file for details) |
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""" |
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from typing import Optional |
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from ...typing import UserID |
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from ..user import service as user_service |
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from ..user.transfer.models import User |
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from .exceptions import AuthenticationFailed |
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from .password import service as password_service |
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def authenticate(screen_name_or_email_address: str, password: str) -> User: |
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"""Try to authenticate the user. |
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Return the user object on success, or raise an exception on failure. |
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""" |
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# Look up user by screen name or email address. |
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user_id = _find_user_id_by_screen_name_or_email_address( |
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screen_name_or_email_address |
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) |
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if user_id is None: |
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# Screen name/email address is unknown. |
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raise AuthenticationFailed() |
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# Ensure account is initialized, not suspended, and not deleted. |
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user = user_service.find_active_user(user_id) |
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if user is None: |
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# Should not happen as the user has been looked up before. |
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raise AuthenticationFailed() |
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# Verify credentials. |
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if not password_service.is_password_valid_for_user(user.id, password): |
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# Password does not match. |
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raise AuthenticationFailed() |
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return user |
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def _find_user_id_by_screen_name_or_email_address( |
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screen_name_or_email_address: str, |
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) -> Optional[UserID]: |
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if '@' in screen_name_or_email_address: |
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user = user_service.find_user_by_email_address( |
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screen_name_or_email_address |
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) |
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else: |
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user = user_service.find_user_by_screen_name( |
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screen_name_or_email_address, case_insensitive=True |
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) |
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if user is None: |
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return None |
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return user.id |
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byceps /
byceps
