All files / src/middleware errorHandler.js

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// Global error handling middleware
const errorHandler = (err, req, res, next) => {
  console.error('Error:', err);
 
  // Default error
  let error = {
    message: err.message || 'Internal Server Error',
    status: err.status || 500
  };
 
  // Handle specific error types
  if (err.name === 'ValidationError') {
    error.status = 400;
    error.message = 'Validation Error';
    error.details = err.details || err.message;
  }
 
  if (err.name === 'CastError') {
    error.status = 400;
    error.message = 'Invalid ID format';
  }
 
  if (err.code === 11000) {
    error.status = 409;
    error.message = 'Duplicate field value';
  }
 
  if (err.name === 'JsonWebTokenError') {
    error.status = 401;
    error.message = 'Invalid token';
  }
 
  if (err.name === 'TokenExpiredError') {
    error.status = 401;
    error.message = 'Token expired';
  }
 
  // Don't leak error details in production
  if (process.env.NODE_ENV === 'production' && error.status === 500) {
    error.message = 'Internal Server Error';
  }
 
  res.status(error.status).json({
    error: error.message,
    ...(error.details && { details: error.details }),
    ...(process.env.NODE_ENV === 'development' && { stack: err.stack })
  });
};
 
// Async error wrapper
const asyncHandler = (fn) => {
  return (req, res, next) => {
    Promise.resolve(fn(req, res, next)).catch(next);
  };
};
 
module.exports = {
  errorHandler,
  asyncHandler
};