"""passbook access helper classes"""
from logging import getLogger
from django.contrib import messages
from django.utils.translation import gettext as _
from passbook.core.models import Application
from passbook.core.policies import PolicyEngine
LOGGER = getLogger(__name__)
class AccessMixin:
"""Mixin class for usage in Authorization views.
Provider functions to check application access, etc"""
# request is set by view but since this Mixin has no base class
request = None
def provider_to_application(self, provider):
"""Lookup application assigned to provider, throw error if no application assigned"""
try:
return provider.application
except Application.DoesNotExist as exc:
messages.error(self.request, _('Provider "%(name)s" has no application assigned' % {
'name': provider
}))
raise exc
def user_has_access(self, application, user):
"""Check if user has access to application."""
LOGGER.debug("Checking permissions of %s on application %s...", user, application)
policy_engine = PolicyEngine(application.policies.all())
policy_engine.for_user(user).with_request(self.request).build()
return policy_engine.result
