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import abc
# see http://plope.com/pyramid_auth_design_api_postmortem
class AbstractIdentityPolicy(metaclass=abc.ABCMeta):
@abc.abstractmethod
async def identify(self, request):
"""Return the claimed identity of the user associated request or
``None`` if no identity can be found associated with the request."""
pass
@abc.abstractmethod
async def remember(self, request, response, identity, **kwargs):
"""Remember identity.
Modify response object by filling it's headers with remembered user.
An individual identity policy and its consumers can decide on
the composition and meaning of **kwargs.
"""
pass
@abc.abstractmethod
async def forget(self, request, response):
""" Modify response which can be used to 'forget' the
current identity on subsequent requests."""
pass
class AbstractAuthorizationPolicy(metaclass=abc.ABCMeta):
@abc.abstractmethod
async def permits(self, identity, permission, context=None):
"""Check user permissions.
Return True if the identity is allowed the permission in the
current context, else return False.
"""
pass
@abc.abstractmethod
async def authorized_userid(self, identity):
"""Retrieve authorized user id.
Return the user_id of the user identified by the identity
or 'None' if no user exists related to the identity.
"""
pass