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Custom Exception Classes
Enterprise-grade error handling with proper HTTP status codes
"""
from typing import Any, Dict, Optional
from fastapi import HTTPException, status
class MiningNitiException(Exception):
"""Base exception for all MiningNiti errors"""
def __init__(
self,
message: str,
code: str = "INTERNAL_ERROR",
details: Optional[Dict[str, Any]] = None,
):
self.message = message
self.code = code
self.details = details or {}
super().__init__(self.message)
class AuthenticationError(HTTPException):
"""Raised when authentication fails"""
def __init__(self, detail: str = "Authentication failed"):
import logging
logging.getLogger("app.core.exceptions").warning(
f"AuthenticationError raised: {detail}"
)
super().__init__(
status_code=status.HTTP_401_UNAUTHORIZED,
detail=detail,
headers={"WWW-Authenticate": "Bearer"},
)
class AuthorizationError(HTTPException):
"""Raised when user lacks permission"""
def __init__(self, detail: str = "Permission denied"):
super().__init__(status_code=status.HTTP_403_FORBIDDEN, detail=detail)
class NotFoundError(HTTPException):
"""Raised when resource is not found"""
def __init__(self, resource: str = "Resource", resource_id: str = ""):
detail = f"{resource} not found"
if resource_id:
detail = f"{resource} with id '{resource_id}' not found"
super().__init__(status_code=status.HTTP_404_NOT_FOUND, detail=detail)
class ValidationError(HTTPException):
"""Raised when request validation fails"""
def __init__(
self, detail: str = "Validation failed", errors: Optional[list] = None
):
super().__init__(
status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
detail={"message": detail, "errors": errors or []},
)
class DocumentProcessingError(MiningNitiException):
"""Raised when document processing fails"""
def __init__(self, message: str, document_id: Optional[str] = None):
super().__init__(
message=message,
code="DOCUMENT_PROCESSING_ERROR",
details={"document_id": document_id} if document_id else {},
)
class AIServiceError(MiningNitiException):
"""Raised when AI service (Gemini) fails"""
def __init__(self, message: str, service: str = "gemini"):
super().__init__(
message=message, code="AI_SERVICE_ERROR", details={"service": service}
)
class RateLimitError(HTTPException):
"""Raised when rate limit is exceeded"""
def __init__(self, retry_after: int = 60):
super().__init__(
status_code=status.HTTP_429_TOO_MANY_REQUESTS,
detail=f"Rate limit exceeded. Retry after {retry_after} seconds.",
headers={"Retry-After": str(retry_after)},
)
class JobNotFoundError(NotFoundError):
"""Raised when background job is not found"""
def __init__(self, job_id: str):
super().__init__(resource="Job", resource_id=job_id)
class SafetyViolationError(MiningNitiException):
"""Raised when safety compliance check fails critically"""
def __init__(self, message: str, violations: list):
super().__init__(
message=message, code="SAFETY_VIOLATION", details={"violations": violations}
)
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