Brushed up the backend, added writing task 1 academic prompt gen and grading ENCOA-274

ielts_be/middlewares/authorization.py

@@ -0,0 +1,36 @@
+from abc import ABC, abstractmethod
+from typing import List, Type
+
+from fastapi import Request
+from fastapi.openapi.models import APIKey, APIKeyIn
+from fastapi.security.base import SecurityBase
+
+from ielts_be.exceptions import CustomException, UnauthorizedException
+
+
+class BaseAuthorization(ABC):
+    exception = CustomException
+
+    @abstractmethod
+    async def has_permission(self, request: Request) -> bool:
+        pass
+
+
+class IsAuthenticatedViaBearerToken(BaseAuthorization):
+    exception = UnauthorizedException
+
+    async def has_permission(self, request: Request) -> bool:
+        return request.user.authenticated
+
+
+class Authorized(SecurityBase):
+    def __init__(self, permissions: List[Type[BaseAuthorization]]):
+        self.permissions = permissions
+        self.model: APIKey = APIKey(**{"in": APIKeyIn.header}, name="Authorization")
+        self.scheme_name = self.__class__.__name__
+
+    async def __call__(self, request: Request):
+        for permission in self.permissions:
+            cls = permission()
+            if not await cls.has_permission(request=request):
+                raise cls.exception