fixing code related to exception handling

media_manager/exceptions.py

@@ -1,16 +1,57 @@
-class MediaAlreadyExists(ValueError):
+from fastapi import Request, HTTPException
+from fastapi.responses import JSONResponse
+
+
+class MediaAlreadyExists(Exception):
     """Raised when a show already exists"""
 
+    def __init__(
+        self, message: str = "Entity with this ID or other identifier already exists"
+    ):
+        super().__init__(message)
+        self.message = message
+
     pass
 
 
 class NotFoundError(Exception):
     """Custom exception for when an entity is not found."""
-
+    def __init__(self, message: str = "The requested entity was not found."):
+        super().__init__(message)
+        self.message = message
     pass
 
 
 class InvalidConfigError(Exception):
     """Custom exception for when an entity is not found."""
-
+    def __init__(self, message: str = "The server is improperly configured."):
+        super().__init__(message)
+        self.message = message
     pass
+
+
+async def media_already_exists_exception_handler(
+    request: Request, exc: MediaAlreadyExists | Exception
+) -> JSONResponse:
+    return JSONResponse(
+        status_code=401,
+        content={"detail": exc.message},
+    )
+
+
+async def not_found_error_exception_handler(
+    request: Request, exc: NotFoundError | Exception
+) -> JSONResponse:
+    return JSONResponse(
+        status_code=404,
+        content={"detail": exc.message},
+    )
+
+
+async def invalid_config_error_exception_handler(
+    request: Request, exc: InvalidConfigError | Exception
+) -> JSONResponse:
+    return JSONResponse(
+        status_code=500,
+        content={"detail": exc.message},
+    )