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modular-auth

v1.1.2

Published

A Node.js auth plugin with JWT and zod validator, In which user can add more fields, validation, schema for auth

Readme

modular-auth

A flexible Node.js authentication plugin for Express, featuring JWT authentication, Zod validation, and dynamic schema extension. Easily add custom fields and validation to your auth flows. Built for modularity and extensibility.

Features

  • JWT-based authentication
  • Zod-powered request validation
  • Easily extend registration schema with custom fields
  • Password hashing with bcrypt
  • Forgot password with email (via nodemailer)
  • Customizable email templates for verification and password reset
  • Mongoose model integration (uses your app's mongoose instance)
  • TypeScript support
  • Built-in middlewares: authProtect, updatePasswordMiddleware

Installation

npm install modular-auth

Usage

1. Setup in your Express app

import express from 'express';
import mongoose from 'mongoose';
import Authentication from 'modular-auth';

await mongoose.connect('mongodb://localhost:27017/yourdb');

const auth = Authentication({
  jwtSecret: 'your_jwt_secret',
  smtp: {
    user: 'your_email_user',
    pass: 'your_email_pass',
    service: 'gmail', // or host/port/secure
    mailFrom: '[email protected]',
  },
  mongoose,
  // Optional: provide a MongoDB URL (if not using an existing connection)
  mongoDBUrl: 'mongodb://localhost:27017/yourdb',
  // Optional: add extra signup fields validator
  signUpExtraZodSchema: {
    age: z.number({ required_error: 'age required' })
  },
  // Optional: add extra signup field with schema
  extraUserSignUpFields: {
    age: Number,
    phone: String,
    username: String
  },
  // Optional: custom response transformers
  transformResponse: {
    login: (user) => ({ token: user.token, user: user.user })
  },
  // Optional: custom email templates
  mailTemplates: {
    verifyMail: 'email template path',
    forgotPassword: '<html>...your custom forgot password template...</html>'
  }
});

const app = express();
app.use(express.json());
app.use('/api/auth', auth.authRoutes);

// Use built-in middlewares
app.use(auth.middleware.authProtect(/* ... */));
app.use(auth.middleware.updatePasswordMiddleware);

app.listen(3000);

2. Extending Registration Schema

Add extra fields to registration by passing a Zod shape:

signUpExtraZodSchema: {
  age: z.number({ required_error: 'age required' })
}

3. Email Templates

You can customize the email templates for verification and password reset by providing your own HTML in the mailTemplates option or by editing the files in src/utils/EmailTemplates.ts.

Default templates:

  • verifyMail — Used for account verification emails. Supports {{name}} and {{verifyLink}} placeholders.
  • forgotPassword — Used for password reset emails. Supports {{name}} and {{randomPassword}} placeholders.

Example (customizing):

mailTemplates: {
  verifyMail: '<html>...your custom verify template...</html>',
  forgotPassword: '<html>...your custom forgot password template...</html>'
}

4. API Endpoints

  • POST /api/auth/register — Register a new user
  • POST /api/auth/login — Login and receive JWT
  • POST /api/auth/forgot-password — Receive a reset password email
  • POST /api/auth/update-profile — Update user profile (protected)
  • POST /api/auth/update-password — Change password (protected)

5. Customizing Responses

You can provide a transformResponse object to customize responses for specific routes:

transformResponse: {
  login: (user) => ({ token: user.token, user: user.user })
}

6. Using the User Model

Access the user model via:

const { userModel } = auth;

7. Using Built-in Middlewares

Access built-in middlewares via:

const { middleware } = auth;
// middleware.authProtect
// middleware.updatePasswordMiddleware

License

ISC

Author

jkhan