oauth_provider: rewrite view to check for access

passbook/core/views/access.py

@@ -0,0 +1,17 @@
+"""passbook access helper classes"""
+from logging import getLogger
+
+LOGGER = getLogger(__name__)
+
+class AccessMixin:
+    """Mixin class for usage in Authorization views.
+    Provider functions to check application access, etc"""
+
+    def provider_to_application(self, provider):
+        """Lookup application assigned to provider, throw error if no application assigned"""
+        return provider.application
+
+    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)
+        return application.user_is_authorized(user)