gitea-admin/gh-christianlouis-inboxconverge

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copilot-swe-agent[bot] da4d501acb fix: Address code review feedback - datetime, event_loop, and readability

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

2026-02-06 22:05:09 +00:00

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Error Codes and Messages

This document catalogs all error codes used in the POP3 to Gmail Forwarder application.

Error Code Format

Error codes follow this pattern: [DOMAIN]_[NUMBER]

AUTH: Authentication and authorization errors (001-099)
MAIL: Mail processing errors (100-199)
SUB: Subscription and billing errors (200-299)
USER: User management errors (300-399)
NOTIFY: Notification errors (400-499)
SYS: System and infrastructure errors (500-599)

Authentication & Authorization (AUTH_001-099)

AUTH_001: Invalid Credentials

HTTP Status: 401 Unauthorized
Message: "Invalid email or password"
Cause: Wrong email/password combination during login
Action: Verify credentials, reset password if needed

AUTH_002: Token Expired

HTTP Status: 401 Unauthorized
Message: "Authentication token has expired"
Cause: JWT token lifetime exceeded
Action: Refresh token or re-authenticate

AUTH_003: Token Invalid

HTTP Status: 401 Unauthorized
Message: "Invalid authentication token"
Cause: Malformed or tampered JWT token
Action: Clear tokens and re-authenticate

AUTH_004: Insufficient Permissions

HTTP Status: 403 Forbidden
Message: "You don't have permission to perform this action"
Cause: User role lacks required permissions
Action: Contact administrator for access

AUTH_005: Email Already Registered

HTTP Status: 409 Conflict
Message: "An account with this email already exists"
Cause: Registration with existing email
Action: Use different email or login instead

AUTH_006: OAuth Provider Error

HTTP Status: 502 Bad Gateway
Message: "Failed to authenticate with OAuth provider"
Cause: Google OAuth service unavailable
Action: Retry or use email/password login

AUTH_007: Invalid OAuth State

HTTP Status: 400 Bad Request
Message: "Invalid OAuth state parameter"
Cause: CSRF token mismatch in OAuth flow
Action: Restart OAuth flow from beginning

AUTH_008: Email Not Verified

HTTP Status: 403 Forbidden
Message: "Please verify your email address"
Cause: Attempting action before email verification
Action: Check email and click verification link

Mail Processing (MAIL_100-199)

MAIL_100: Connection Failed

HTTP Status: 502 Bad Gateway
Message: "Failed to connect to POP3/IMAP server"
Cause: Network error, wrong host/port, firewall
Action: Verify host, port, network connectivity

MAIL_101: Authentication Failed

HTTP Status: 401 Unauthorized
Message: "POP3/IMAP authentication failed"
Cause: Invalid credentials for mail account
Action: Update mail account credentials

MAIL_102: SSL/TLS Error

HTTP Status: 502 Bad Gateway
Message: "SSL/TLS connection error"
Cause: Certificate issues, SSL not supported
Action: Verify SSL settings, check certificate

MAIL_103: Mailbox Not Found

HTTP Status: 404 Not Found
Message: "Mailbox or folder not found"
Cause: IMAP folder doesn't exist
Action: Check folder name, create if needed

MAIL_104: Message Retrieval Failed

HTTP Status: 500 Internal Server Error
Message: "Failed to retrieve email message"
Cause: Corrupt message, server error
Action: Skip message, contact mail provider

MAIL_105: Forward Failed

HTTP Status: 502 Bad Gateway
Message: "Failed to forward email"
Cause: SMTP error, network issue
Action: Retry, check SMTP settings

MAIL_106: Rate Limit Exceeded

HTTP Status: 429 Too Many Requests
Message: "Email forwarding rate limit exceeded"
Cause: Too many emails sent too quickly
Action: Wait, upgrade plan, adjust throttling

MAIL_107: Message Too Large

HTTP Status: 413 Payload Too Large
Message: "Email message exceeds size limit"
Cause: Message larger than allowed size
Action: Filter large messages, upgrade plan

MAIL_108: Invalid Email Format

HTTP Status: 422 Unprocessable Entity
Message: "Email message format is invalid"
Cause: Malformed email headers or body
Action: Check source email, skip if necessary

MAIL_109: Encryption Failed

HTTP Status: 500 Internal Server Error
Message: "Failed to encrypt mail credentials"
Cause: Encryption key issue
Action: Check ENCRYPTION_KEY configuration

MAIL_110: Decryption Failed

HTTP Status: 500 Internal Server Error
Message: "Failed to decrypt mail credentials"
Cause: Wrong encryption key or corrupt data
Action: Re-save credentials with correct key

Subscription & Billing (SUB_200-299)

SUB_200: Subscription Required

HTTP Status: 402 Payment Required
Message: "This feature requires an active subscription"
Cause: Attempting premium feature without subscription
Action: Subscribe to a plan

SUB_201: Limit Reached

HTTP Status: 403 Forbidden
Message: "You've reached your plan limit for [resource]"
Cause: Plan limits exceeded (accounts, emails, etc.)
Action: Upgrade plan or remove unused resources

SUB_202: Payment Failed

HTTP Status: 402 Payment Required
Message: "Payment processing failed"
Cause: Invalid payment method, insufficient funds
Action: Update payment method

SUB_203: Subscription Expired

HTTP Status: 402 Payment Required
Message: "Your subscription has expired"
Cause: Subscription period ended
Action: Renew subscription

SUB_204: Invalid Plan

HTTP Status: 404 Not Found
Message: "Subscription plan not found"
Cause: Requesting non-existent plan
Action: Choose valid plan from available options

SUB_205: Downgrade Not Allowed

HTTP Status: 409 Conflict
Message: "Cannot downgrade: usage exceeds new plan limits"
Cause: Current usage > target plan limits
Action: Reduce usage before downgrading

User Management (USER_300-399)

USER_300: User Not Found

HTTP Status: 404 Not Found
Message: "User account not found"
Cause: Invalid user ID or deleted account
Action: Verify user ID or create account

USER_301: Profile Update Failed

HTTP Status: 500 Internal Server Error
Message: "Failed to update user profile"
Cause: Database error, validation failure
Action: Retry, check input data

USER_302: Password Too Weak

HTTP Status: 422 Unprocessable Entity
Message: "Password does not meet security requirements"
Cause: Password too short or simple
Action: Use stronger password (8+ chars, mixed case, numbers)

USER_303: Deletion Restricted

HTTP Status: 409 Conflict
Message: "Cannot delete user: active subscription"
Cause: User has active subscription
Action: Cancel subscription first

Notifications (NOTIFY_400-499)

NOTIFY_400: Notification Failed

HTTP Status: 500 Internal Server Error
Message: "Failed to send notification"
Cause: Notification service error
Action: Check notification service configuration

NOTIFY_401: Invalid Channel

HTTP Status: 422 Unprocessable Entity
Message: "Invalid notification channel"
Cause: Unsupported notification type
Action: Use supported channel (email, webhook, etc.)

NOTIFY_402: Channel Not Configured

HTTP Status: 424 Failed Dependency
Message: "Notification channel not configured"
Cause: Required channel settings missing
Action: Configure notification settings

System Errors (SYS_500-599)

SYS_500: Database Error

HTTP Status: 500 Internal Server Error
Message: "Database operation failed"
Cause: Database connection or query error
Action: Retry, check database status

SYS_501: Redis Error

HTTP Status: 500 Internal Server Error
Message: "Cache service unavailable"
Cause: Redis connection error
Action: Check Redis service status

SYS_502: Celery Task Failed

HTTP Status: 500 Internal Server Error
Message: "Background task processing failed"
Cause: Celery worker error
Action: Check worker logs, retry task

SYS_503: Configuration Error

HTTP Status: 500 Internal Server Error
Message: "System configuration error"
Cause: Invalid or missing configuration
Action: Check environment variables

SYS_504: External Service Timeout

HTTP Status: 504 Gateway Timeout
Message: "External service request timed out"
Cause: Slow response from external API
Action: Retry, check service status

Usage in Code

Example: Raising Errors

from fastapi import HTTPException, status
from app.core.errors import ErrorCode, ErrorResponse

# Structured error response
raise HTTPException(
    status_code=status.HTTP_403_FORBIDDEN,
    detail=ErrorResponse(
        code=ErrorCode.SUB_201,
        message="You've reached your plan limit for mail accounts",
        details={
            "current": 5,
            "limit": 5,
            "plan": "basic",
            "upgrade_url": "/pricing"
        }
    ).dict()
)

Example: Error Response Schema

from pydantic import BaseModel

class ErrorResponse(BaseModel):
    code: str  # e.g., "MAIL_100"
    message: str  # Human-readable message
    details: dict = {}  # Additional context
    timestamp: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
    request_id: str = ""  # For tracing

Example: Client Handling

// Frontend error handling
try {
  const response = await fetch('/api/v1/mail-accounts/', options);
  if (!response.ok) {
    const error = await response.json();
    
    switch(error.code) {
      case 'SUB_201':
        showUpgradeModal(error.details);
        break;
      case 'MAIL_100':
        showConnectionErrorDialog(error.message);
        break;
      default:
        showGenericError(error.message);
    }
  }
} catch (err) {
  console.error('Request failed:', err);
}

Adding New Error Codes

When adding new error codes:

Choose appropriate category (AUTH, MAIL, SUB, USER, NOTIFY, SYS)
Assign next available number in that range
Document in this file with:
- HTTP status code
- Message template
- Cause
- Recommended action
Update app/core/errors.py with the code constant
Add to API documentation examples

Last Updated: 2026-02-06 Maintainer: Development Team

10 KiB Raw Blame History