flyer-crawler.projectium.com/src/middleware/errorHandler.ts

// src/middleware/errorHandler.ts
import { Request, Response, NextFunction } from 'express';
import { logger } from '../services/logger.server';

interface HttpError extends Error {
  status?: number;
  // You can add other custom properties like 'code' if needed
}

export const errorHandler = (err: HttpError, req: Request, res: Response, next: NextFunction) => {
  // If the response headers have already been sent, we must delegate to the default Express error handler.
  if (res.headersSent) {
    return next(err);
  }

  // Use the status code from the error if it exists, otherwise default to 500.
  const statusCode = err.status || 500;

  // Log the full error details for debugging, especially for server errors.
  if (statusCode >= 500) {
    logger.error('Unhandled API Error:', { error: err.stack || err.message, path: req.path, method: req.method });
  }

  res.status(statusCode).json({
    message: statusCode >= 500 ? 'An unexpected server error occurred.' : err.message,
  });
};