README.md

Project: E-Commerce GraphQL API

Core Features:

1. Product Management:

   • Query: Fetch a list of products with filtering, sorting, and pagination options.
   • Mutation: Add, update, or delete a product.
   • Fields: id, name, description, price, category, stock, images.

2. User Authentication:

   • Mutation: Register a user, log in, and log out.
   • Query: Fetch the current authenticated user's details.
   • Fields: id, username, email, token.

3. Shopping Cart:

   • Query: Fetch items in the cart for the authenticated user.
   • Mutation: Add an item to the cart, remove an item, update quantities.
   • Fields: id, productId, quantity, price.

4. Orders:

   • Query: Fetch a user’s order history.
   • Mutation: Create an order (checkout).
   • Fields: id, products, total, status, createdAt.

5. Reviews:

   • Query: Fetch reviews for a product.
   • Mutation: Add, edit, or delete a review.
   • Fields: id, userId, productId, rating, comment, createdAt.

Advanced Features:

1. Real-Time Updates:

   • Subscription: Notify users about product stock updates or order status changes.

2. Dynamic Pricing:

   • Query: Calculate discounts or special offers dynamically during checkout.

3. Recommendations:

   • Query: Fetch product recommendations based on user purchase history.

Tech Stack:

• Node.js: Backend runtime.
• Apollo Server: GraphQL implementation for building the API.
• MongoDB: Database for storing products, users, orders, and reviews.
• JWT: Authentication and authorization.

Folder Structure:

graphql-nodejs-ecommerce/
├── src/
│   ├── schema/
│   │   ├── typeDefs.js  # Define GraphQL schema
│   │   └── resolvers.js # Implement resolvers
│   ├── models/
│   │   ├── Product.js
│   │   ├── User.js
│   │   ├── Order.js
│   │   └── Review.js
│   ├── services/
│   │   ├── authService.js
│   │   └── productService.js
│   └── index.js         # Entry point
├── package.json
└── .env

Testing the Application:

Run the following mutations/queries in Apollo Studio or Postman to test:

Register a User

mutation {
  register(name: "Jhon Doe", email: "[email protected]", password: "securepassword", role: "admin") {
    user {
      id
      name
      email
      role
    }
    token
  }
}

Login a User

mutation {
  login(email: "[email protected]", password: "securepassword") {
    user {
      id
      name
    }
    token
  }
}

Create a Product

Include the token in the header (Authorization: Bearer <token>):

mutation {
  createProduct(name: "Product A", description: "Description A", price: 19.99) {
    id
    name
    price
  }
}

Command Execution:

npm install

npm run start or npm run dev or npm run test