📚 Library Management System API

A RESTful API for managing books and borrow operations in a digital library system.

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🚀 Technologies Used

Technology	Description	Docs
Node.js	JavaScript runtime for building server-side apps	https://nodejs.org/en/docs
Express.js	Web framework for Node.js	https://expressjs.com/
TypeScript	Strongly typed JavaScript	https://www.typescriptlang.org/docs/
Mongoose	MongoDB ODM for data modeling	https://mongoosejs.com/docs/
MongoDB	NoSQL database	https://www.mongodb.com/docs
Zod	Schema validation for request data	https://zod.dev/
ts-node-dev	Live reloading TypeScript development server	https://www.npmjs.com/package/ts-node-dev
dotenv	Load environment variables	https://www.npmjs.com/package/dotenv

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⚙️ Setup

1. Clone repo
2. Run npm install
3. Setup .env with DB user and password
4. Run npm run dev to start the server

API Endpoints

Create Book

• POST /api/book/
• Body:

{
  "title": "1984",
  "author": "George Orwell",
  "genre": "FICTION",
  "isbn": "9780451524935",
  "copies": 5
}

Get Books

• GET /api/book?filter=&sortBy=&sort=&limit=

Borrow Book

• POST /api/borrow
• Body:

{
  "book": "bookObjectId",
  "quantity": 2,
  "dueDate": "2025-07-18T00:00:00.000Z"
}

Borrow Summary

• GET /api/borrow

Delete Book

• DELETE /api/book/:bookId

Error Handling

• 400 for validation errors
• 404 if book not found
• 500 for server errors

Business Logic

• Borrowing deducts copies, disables availability if 0 copies left