@mark01/express-utils/lib/error/index.js

npm package that contains utilities for express.js

import { ZodError } from 'zod';
import { AppError } from './AppError';
export const formatZodError = (error) => {
    const { issues } = error;
    if (issues.length) {
        const { path, message } = issues[0];
        const pathString = path.join('.');
        return `${pathString}: ${message}`;
    }
    return 'Unknown Zod validation error';
};
export const defaultHandleOperationalErrors = (err) => {
    if (err instanceof SyntaxError) {
        return new AppError('Invalid JSON! Please provide a valid one.', 400, err);
    }
    if ('type' in err && err.type === 'entity.too.large') {
        return new AppError('Request too large! Please reduce your payload.', 413, err);
    }
    if (err instanceof ZodError) {
        return new AppError(formatZodError(err), 400, err);
    }
    console.error(err);
    return new AppError('Internal Server Error!', 500, err);
};
export const errorHandler = (config) => {
    const { environment, handleOperationalErrors } = config;
    return (err, _req, res, next) => {
        const sendErrorResponse = (error) => {
            const response = {
                status: 'error',
                message: error.message,
                ...(environment === 'development' && { stack: error.stack }),
            };
            res.status(error.statusCode).json(response);
        };
        if (err instanceof AppError) {
            sendErrorResponse(err);
            return;
        }
        if (err instanceof Error) {
            const operationalError = handleOperationalErrors?.(err);
            if (operationalError)
                sendErrorResponse(operationalError);
            else
                sendErrorResponse(defaultHandleOperationalErrors(err));
            return;
        }
        const unknownError = new AppError('Unknown error! Please try again later.', 500, err);
        console.error('Unknown error:', err);
        sendErrorResponse(unknownError);
        next();
    };
};
export { AppError };