Initial commit

accounts/access.py

@@ -0,0 +1,20 @@
+from .models import PremiumEntitlement
+
+
+def has_lifetime_premium(user):
+    """Return whether a user may access Lifetime Premium content."""
+    if not getattr(user, "is_authenticated", False):
+        return False
+    if user.is_staff or user.is_superuser:
+        return True
+    return PremiumEntitlement.objects.filter(
+        user=user,
+        revoked_at__isnull=True,
+    ).exists()
+
+
+def can_access_exam(user, exam_set):
+    return (
+        exam_set.access_level == exam_set.ACCESS_FREE
+        or has_lifetime_premium(user)
+    )