Initial commit

app/core/exceptions.py

@@ -0,0 +1,35 @@
+"""Application-level exceptions with HTTP status codes."""
+
+from __future__ import annotations
+
+
+class AppException(Exception):
+    def __init__(self, status_code: int, detail: str):
+        self.status_code = status_code
+        self.detail = detail
+        super().__init__(detail)
+
+
+class NotFoundException(AppException):
+    def __init__(self, detail: str = "Resource not found"):
+        super().__init__(status_code=404, detail=detail)
+
+
+class UnauthorizedException(AppException):
+    def __init__(self, detail: str = "Not authenticated"):
+        super().__init__(status_code=401, detail=detail)
+
+
+class ForbiddenException(AppException):
+    def __init__(self, detail: str = "Not enough permissions"):
+        super().__init__(status_code=403, detail=detail)
+
+
+class BadRequestException(AppException):
+    def __init__(self, detail: str = "Bad request"):
+        super().__init__(status_code=400, detail=detail)
+
+
+class ConflictException(AppException):
+    def __init__(self, detail: str = "Resource already exists"):
+        super().__init__(status_code=409, detail=detail)