🧠 Manga-BE — AI-Powered Manga Marketplace (Backend)

🔗 GitHub Repo: Manga-BE

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🚀 Project Overview

Manga-BE is the backend API for a full-stack AI-powered e-commerce platform where users can buy and sell manga books. It supports powerful, real-world features such as:

• 🧠 AI-generated manga summaries (via HuggingFace Inference API)
• 💳 Stripe-powered secure payments
• 🔐 JWT Authentication with role-based access
• 🖼️ Cloudinary for image & file uploads
• ↻ RESTful APIs for books, users, orders, reviews, and authentication

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🔑 Key Features

✅ AI Summary Generation

• Powered by HuggingFace's facebook/bart-large-cnn model
• Dynamically summarizes manga using title, genre, and description
• Smart prompt: simulates a top bookseller crafting a sales-focused pitch

📚 Book Management API

• Full CRUD operations for books
• Accepts cover + additional images, and PDF manga files
• Summary auto-generated by AI for sellers

🔐 User Authentication

• JWT-based auth flow
• Login & Signup APIs
• Role-based access (admin, seller, buyer)
• Auth middleware to protect sensitive routes

💬 Reviews & Ratings

• Add ratings/comments to any manga book
• Fetch aggregated review data
• Structured schema for scalability

💳 Stripe Checkout Integration

• Dynamically create checkout sessions for each book
• Handles webhook/payment flow (extendable)
• Secure key management with .env

☁️ Cloudinary Upload System

• Upload and manage book cover images and PDFs
• Modular upload utility (cloudinary.js)

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🧠 Folder Structure

Manga-BE/
├── controllers/
│   ├── authController.js
│   ├── bookController.js
│   ├── paymentController.js
│   └── reviewController.js
├── middleware/
│   └── authMiddleware.js
├── routers/
│   ├── auth.js
│   ├── books.js
│   ├── payments.js
│   └── ai.js
├── utils/
│   ├── cloudinary.js
│   └── ai.js
├── config/
│   └── db.js
├── models/
│   ├── User.js
│   └── Book.js
├── server.js
└── .env

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⚙️ Tech Stack

Technology	Role
Node.js	Backend Runtime
Express.js	API Framework
MongoDB	Database
Cloudinary	File/Image Uploads
HuggingFace	AI-Powered Summarization
Stripe	Payment Integration
JWT	Auth & Authorization
Axios	API Requests
dotenv	Secure Config

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🔐 Environment Variables

Create a .env file in the project root:

PORT=8080
MONGO_URI=your_mongo_connection_string
JWT_SECRET=your_jwt_secret
CLOUDINARY_CLOUD_NAME=your_cloud_name
CLOUDINARY_API_KEY=your_api_key
CLOUDINARY_API_SECRET=your_api_secret
STRIPE_SECRET_KEY=your_stripe_secret_key
HF_API_TOKEN=your_huggingface_token

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🔍 API Endpoints

Method	Endpoint	Description
POST	/auth/signup	Register a new user
POST	/auth/login	Login and get JWT token
POST	/book/add	Add a new book with AI summary
GET	/book/all	Get all available manga books
POST	/payment/checkout-session	Start Stripe checkout session
POST	/generate-summary	Generate manga summary using AI
POST	/review/:bookId	Submit review for a manga

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🧠 AI Summary Prompt Strategy

Consider yourself the best bookseller in the world. You MUST write a compelling manga description in 2–3 lines that will make people want to read it instantly — or risk losing your business.

• Model used: facebook/bart-large-cnn
• Result: crisp, human-like summaries focused on marketing impact

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🧪 Testing the API

Start the server:

npm install
npm run dev

Then use Postman or the frontend repo Manga-FE to test.

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📦 Related Repositories

Project	Repository
💻 Frontend (React)	Manga-FE

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💼 Recruiter’s Note

This project showcases real-world backend engineering skills:

• ✅ Modular REST API design using Express
• ✅ HuggingFace integration (AI prompt + secure token headers)
• ✅ End-to-end Stripe payment implementation
• ✅ JWT authentication with RBAC structure
• ✅ Cloud file/image upload system using Cloudinary

If you're looking for a developer who can build production-ready, intelligent, and scalable backend systems — this is hands-on proof of that.

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📜 License

Licensed under the MIT License.

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Made with ❤️ by Rohit Kumar