@ticketscx/common

This npm package is designed to simplify error handling and authentication in Express.js applications. It provides a set of middleware functions and utilities for creating custom errors, handling errors, authenticating users, and validating requests.

Installation

You can install the package using npm:

npm install @ticketscx/common

Usage

Custom Error

You can create custom errors by importing the CustomError class and extending it:

const { CustomError } = require('@ticketscx/common');

class NotFoundError extends CustomError { > statusCode = 404;

constructor(message) { > super(message); > Object.setPrototypeOf(this, NotFoundError.prototype); > }

serializeErrors() { > return [{ message: this.message }]; > } > }

Error Handler Middleware

The errorHandler middleware handles errors in your Express application. It logs the error and sends an appropriate response:

const { errorHandler } = require('@ticketscx/common');

app.use(errorHandler);

Current User Middleware

The currentUser middleware sets the current user on the request object based on the provided authentication strategy:

const { currentUser } = require('@ticketscx/common');

app.use(currentUser);

Require Auth Middleware

The requireAuth middleware checks if the user is authenticated and throws an error if not:

const { requireAuth } = require('@ticketscx/common');

app.use(requireAuth);

Validate Request Middleware

The validateRequest middleware validates the request body using the provided validation rules:

const { validateRequest } = require('@ticketscx/common'); > const { body } = require('express-validator');

app.post( > '/api/users', > [ > body('email').isEmail().withMessage('Email must be valid'), > body('password') > .trim() > .isLength({ min: 4, max: 20 }) > .withMessage('Password must be between 4 and 20 characters'), > ], > validateRequest, > async (req, res) => { > // Handle request > } > );