Backend Maker CLI

This CLI tool is designed to streamline setting up a Node.js backend project. It includes features for setting up database configurations, adding necessary middleware, and initializing a project structure for ease of development

Features

✅ Quick Initialization: Generate a project structure with MongoDB, MySQL, or no database.
✅ Modular Add-Ons: Use simple commands to add Docker, Multer, Redis, Nodemailer, and more.
✅ Redis Support: Pre-configured Redis caching for faster APIs.
✅ Developer-Friendly Defaults: Comes with a clean folder structure, middleware, and basic routes.
✅ Extendable: Easy-to-use commands to include advanced features as needed.

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Commands

• init command to initialize a backend project with MongoDB or MySQL database or none.
• add command to add optional features like Multer, Docker, MongoDB, MySQL, Nodemailer, etc boilerplate code

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Installation

To install the backend-maker-cli package globally, use npm:

npm install -g backend-maker-cli

Once installed, you can run the CLI commands from your terminal.

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Usage

1. Initialize Your Backend Project

To initialize your project structure, run:

backend-maker init

This will set up a basic backend project structure with default configurations.

If you want to set up a specific database (either MongoDB or MySQL) right at the start, you can use the following commands:

• For MongoDB:

backend-maker init --mongodb

• For MySQL:

backend-maker init --mysql

These commands will add the necessary database configurations to your project.

2. Adding Optional Features

After you initialize your project, you can add optional features as you require. Use the add command to add features like Multer, Docker, etc.

For example, to add Multer (for file uploading), run:

backend-maker add multer

This will generate a Dockerfile for your Node.js project:

backend-maker add docker

To learn more about available features, you can use the --help option:

backend-maker add --help

This will display a list of all the available features you can add to your project, including options for Docker, MongoDB, and more.

3. Redis Integration

This package now supports Redis for caching and improving API performance.
Configuration is located in:

• Connection setup: ./config/redis.js
• Caching APIs: ./utils/redis-cache.js

Setup Redis

Add the following variables to your .env file:

REDIS_HOST=127.0.0.1
REDIS_PORT=6379
REDIS_PASSWORD=your_redis_password

Redis allows you to cache API responses, significantly boosting performance by reducing redundant database queries or computations.

Flexible Package Choice

You can choose between the official redis package and the ioredis package for Redis integration. When setting up Redis, an interactive CLI guides you through selecting your preferred package.

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4. Google OAuth Integration

This feature provides an easy and secure way to implement Google OAuth 2.0 for user authentication in your application. With this integration, users can sign in using their Google accounts, reducing the need for creating separate credentials for your application.

Key Features • Secure Authentication: Allows users to log in via their Google accounts, leveraging OAuth 2.0 for enhanced security.

• Session Management: Automatically manages user sessions with serialization and deserialization logic.

• Customizable Routes: Predefined routes for login, callback, profile, and logout, making it easy to plug and play.

USAGE

backend-maker add passport-google

Integrate with Your App

const { configureGooglePassport, initializeGoogleAuth } = require('./middlewares/passport-google');
const googleRoutes = require('./routes/Google-0Auth-SampleRoutes');

const app = express();
configureGooglePassport();
initializeGoogleAuth(app);

app.use('/auth', googleRoutes);

Passport-local, Passport-GitHub, Passport-Facebook also available now ✅

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5. Docker Initialization (In Progress)

To initialize Docker configurations for your project, run:

docker init

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Folder Structure

Here is the folder structure for the generated project:

my-backend-project/
│
├── config/                 # Database, middleware, and general config files
│   ├── dbMongo.js          # Database connection logic
│   ├── multer.js           # Multer configuration for file uploads
|   ├── redis.js            # Redis configuration for caching
|   ├── cloudinary.js       # Cloudinary configuration for image, video uploads on 
|                             cloud
|
|── constants/             # Constants for your application
│
├── controllers/             # Controllers for your routes
│   ├── authController.js    # Example controller
│
├── models/                  # Database models (e.g., User, Product)
│   ├── authModel.js         # Example model
│
├── middlewares/
|  ├── authMiddleware.js
│  ├── passport-google.js    # Passport Google strategy
│  ├── passport-github.js    # Passport GitHub strategy
|
├── routes/                  # Routes for your application
│   ├── sampleRoutes.js      # Example routes for user-related endpoints
│
├── public/                  # Public folder (for uploaded files)
│   └── uploads/             # Folder for storing file uploads
│
├── utils/                   # Utility functions and helpers
│   ├── emailSender.js       # Email sender utility
│   ├── redis-cache.js       # Redis caching utility
|
├── .env                     # Environment variables (Email, DB credentials, etc.)
├── .gitignore               # Git ignore file to prevent sensitive files from being tracked
├── app.js                   # Main server file to start your application
├── package.json             # NPM package configuration
├── Dockerfile               # Dockerfile for containerizing your node app

Code Snippets

Here are some of the core features of the generated structure:

1. Express Server Setup (app.js)

const express = require('express');
const app = express();
const dotenv = require('dotenv');
dotenv.config();

app.use(express.json());
app.set(express.urlencoded({ extended: true }));
const cors = require('cors');
app.use(cors());

const connectDB = require('./config/db');
connectDB();

const authMiddleware = require('./middleware/authMiddleware');
const sampleRoutes = require('./routes/sampleRoutes.js');

const PORT = 8000 || process.env.PORT;

app.get('/', (req, res) => res.send('HELLO WORLD'));

app.use('/api', sampleRoutes);

app.listen(PORT, () => {
    console.log(`Server is running at http://localhost:${PORT}`);
});

2. MongoDB Connection (config/dbMongo.js)

const mongoose = require('mongoose');
const dotenv = require('dotenv');
dotenv.config()

function connectToDb() {
    try {
        mongoose.connect(process.env.MONGO_URI)
            .then(() => console.log('Connected to MongoDB'))
    } catch (err) {
        console.error(`Error: ${err.message}`);
        process.exit(1);
    }
}

module.exports = connectToDb;

Ensure you define the following in your .env file:

MONGO_URI=mongodb://your-mongo-uri

3. Multer File Upload Configuration (config/multer.js)

const multer = require('multer');

const storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, 'public/uploads/');
  },
  filename: function (req, file, cb) {
    cb(null, Date.now() + '-' + file.originalname);
  }
});

const fileSizeLimit = 1024 * 1024 * 100; // 100MB file size limit

const upload = multer({
  storage: storage,
  limits: {
    fileSize: fileSizeLimit,
  },
  fileFilter: function (req, file, cb) {
    if (!file.mimetype.startsWith('image/')) {
      return cb(new Error('Only image files are allowed.'));
    }
    cb(null, true);
  }
});

module.exports = upload;

4. JWT Authentication Middleware (middleware/authMiddleware.js)

const jwt = require('jsonwebtoken');

const authMiddleware = (req, res, next) => {
    const token = req.headers['authorization'];
    if (!token) return res.status(401).send({ error: 'Access Denied' });
    
    try {
        const verified = jwt.verify(token, process.env.JWT_SECRET);
        req.user = verified;
        next();
    } catch (err) {
        res.status(400).send({ error: 'Invalid Token' });
    }
};

module.exports = authMiddleware;

5. REDIS CACHE (utils/redis-cache.js)

const redis = require('../config/redis');
const messages = require('../constants/redisMessages');

// Function to set a key in Redis with expiration
const setCache = async (key, value, ttl = 3600) => {
  try {
    await redis.set(key, JSON.stringify(value), 'EX', ttl);
    console.log("messages.CACHE_SET_SUCCESS" + key);
  } catch (err) {
    console.error(messages.SET_CACHE_ERROR + " " + key, err);
  }
};

// Function to get a key from Redis
const getCache = async (key) => {
  try {
    const data = await redis.get(key);
    return data ? JSON.parse(data) : null;
  } catch (err) {
    console.error(messages.GET_CACHE_ERROR + " " + key, err);

    return null;
  }
};

// Function to delete a key from Redis
const deleteCache = async (key) => {
  try {
    await redis.del(key);
    console.log("messages.CACHE_DELETED_SUCCESS" + key);
  } catch (err) {
    console.error(messages.DELETE_CACHE_ERROR + " " + key, err);

  }
};

module.exports = { setCache, getCache, deleteCache };

6. Email Sending (utils/emailSender.js)

const nodemailer = require('nodemailer');
require('dotenv').config(); 

const transporter = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: process.env.EMAIL,  // Make sure to define EMAIL and PASS in your .env file
    pass: process.env.EMAIL_PASSWORD,  
  },
});

const sendEmail = (to, subject, text, html) => {
  const mailOptions = {
    from: process.env.EMAIL,  
    to: to, 
    subject: subject, 
    text: text, 
    html: html,  
  };

  return new Promise((resolve, reject) => {
    transporter.sendMail(mailOptions, (error, info) => {
      if (error) {
        return reject(error); 
      }
      resolve(info);
    });
  });
};

module.exports = sendEmail;

7. MYSQL-SEQUELIZE Connection (config/dbMysql.js)

const { Sequelize } = require("sequelize");

// Configure Sequelize instance with options
const sequelize = new Sequelize(process.env.MYSQL_URI, {
    dialect: "mysql",
    logging: process.env.SEQUELIZE_LOGGING === "true" ? console.log : false, // Toggle query logging
    pool: {
        max: 5, // Maximum number of connections in pool
        min: 0, // Minimum number of connections in pool
        acquire: 30000, // Maximum time (ms) to get a connection
        idle: 10000, // Maximum time (ms) a connection can be idle
    },
    retry: {
        max: 3, // Retry connection attempts
    },
});

// Async function to connect to the database
const connectDB = async () => {
    try {
        await sequelize.authenticate();
        console.log("✅ MySQL Connected successfully.");
    } catch (err) {
        console.error("❌ Unable to connect to the database. Please check the connection details:", err.message);

        // Retry mechanism for better fault tolerance
        console.error("⚠️ Retrying database connection...");
        setTimeout(async () => {
            try {
                await sequelize.authenticate();
                console.log("✅ MySQL Reconnected successfully after retry.");
            } catch (retryErr) {
                console.error("❌ Retry failed. Exiting application:", retryErr.message);
                process.exit(1); // Exit the application in case of persistent failure
            }
        }, 5000);
    }
};

// Export both the Sequelize instance and the connection function
module.exports = { sequelize, connectDB };

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Contributing

Feel free to open issues or pull requests for improvements. Suggestions are always welcome!

License: MIT

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