Add initial middleware and configuration for blocking AI user agents

ai_blocker/ualist_backers.py

@@ -0,0 +1,16 @@
+from abc import ABC, abstractmethod
+
+from django.conf import settings
+
+
+class UAList(ABC):
+
+    @abstractmethod
+    def get_ua_list(self) -> list[str]:
+        raise NotImplemented
+
+
+
+class ConfigBackedUAList(UAList):
+    def get_ua_list(self) -> list[str]:
+        return list(getattr(getattr(settings, "AI_BLOCKER_CONF"), "ua_list", []))