Absolutely! Here's a concise documentation outline for the backend setup we've created:

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E-Commerce Backend Documentation

Introduction

This documentation covers the setup and usage of the backend for an e-commerce application built using Node.js, Express, TypeScript, and MongoDB.

Setup

Prerequisites

• Node.js (latest LTS version recommended)
• MongoDB (installed and running locally or accessible remotely)
• npm (Node Package Manager)

Installation

1. Clone the repository from GitHub:

   git clone <repository-url>
   cd <project-directory>

2. Install dependencies:

   npm install

3. Set up environment variables:

   Create a .env file in the root directory with the following variables:

   PORT=5000
   MONGO_URI=mongodb://localhost:27017/ecommerce
   JWT_SECRET=your_jwt_secret
   

Folder Structure

├── src/
│   ├── config/
│   │   └── db.ts             # Database configuration (MongoDB connection)
│   ├── controllers/
│   │   ├── authController.ts # Controllers for authentication (register, login)
│   ├── middleware/
│   │   └── auth.ts           # Middleware for JWT authentication
│   ├── models/
│   │   └── User.ts           # Mongoose schema for User model (with password hashing)
│   ├── routes/
│   │   └── authRoutes.ts     # Express routes for authentication endpoints
│   ├── app.ts                # Main Express application setup
│   └── server.ts             # Server initialization
├── .env                      # Environment variables configuration
├── package.json              # Project dependencies and scripts
└── tsconfig.json             # TypeScript configuration

Usage

Starting the Server

To start the server, run:

npm start

The server will run on localhost:5000 by default (or the port specified in your .env file).

API Endpoints

Authentication

• Register User:

  POST /api/auth/register

  Request Body:

  {
    "name": "John Doe",
    "email": "[email protected]",
    "password": "password123"
  }

• Login User:

  POST /api/auth/login

  Request Body:

  {
    "email": "[email protected]",
    "password": "password123"
  }

  Response:

  {
    "token": "your_jwt_token"
  }

Authentication Middleware

Protected routes can be created by using the auth middleware. Example:

import express from "express";
import { auth } from "../middleware/auth";

const router = express.Router();

router.get("/protected-route", auth, (req, res) => {
  // Access authenticated user via req.user
  res.json({ msg: "Authenticated route", user: req.user });
});

export default router;

Error Handling

• Validation errors and server errors are handled centrally within controllers.
• Error messages are returned as JSON responses with appropriate HTTP status codes.

Dependencies

• Express: Web framework for Node.js.
• Mongoose: MongoDB object modeling tool.
• bcrypt: Password hashing library.
• jsonwebtoken: JWT implementation for Node.js.
• dotenv: Environment variable loader.

Conclusion

This documentation provides a comprehensive guide to setting up and using the backend for an e-commerce application. For more details on specific endpoints or configurations, refer to the respective source files in the src directory.

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This outline covers the essential aspects of your backend setup, including setup instructions, folder structure, usage examples, API endpoints, authentication middleware, error handling, dependencies, and a conclusion summarizing the documentation. Adjust it further based on specific details or additional functionalities you might add to your application.