webapp/app/core/biz_exception.py

from typing import Optional, Dict, Any

class BizException(Exception):
    def __init__(
        self,
        code: int,
        message: str,
        http_status: int = 400,
        extra: Optional[Dict[str, Any]] = None,
    ):
        self.code = code
        self.message = message
        self.http_status = http_status
        self.extra = extra


class NotFoundError(BizException):
    def __init__(self, message="Resource not found"):
        super().__init__(code=40401, message=message, http_status=404)

class PermissionDeniedError(BizException):
    def __init__(self, message="Permission denied"):
        super().__init__(code=40301, message=message, http_status=403)
        
class SessionExpiredOrInvalid(BizException):
    def __init__(self, message="Session expired or invalid"):
        super().__init__(code=40101, message=message, http_status=401)

class BizLogicError(BizException):
    def __init__(self, message="Business logic error"):
        super().__init__(code=40001, message=message)