📚 Library Management System

🏗️ Architecture

The project is split into two main parts:

• Backend: A RESTful API built with Express and Mongoose.
• Frontend: A responsive SPA built with React and Vite.

🚀 Features

• Book Inventory Management:
  • Full CRUD operations (Create, Read, Update, Delete).
  • Search by title, author, or category.
  • Filter by publication year or specific categories (e.g., Fiction).
  • Inventory controls: Update available copies and categories.
  • Deletion safety: Books can only be deleted if stock is zero.
• Customer Directory:
  • Manage customer profiles (Name, Age, Membership).
  • Search and filter customers.
  • Membership badges (Bronze, Silver, Gold, Platinum).
• Modern UI/UX:
  • Dashboard-style interface with tabbed navigation.
  • Real-time feedback (loading states, success/error notifications).
  • Responsive design for mobile and desktop.

🛠️ Tech Stack

Backend

• Node.js & Express.js (v5.2.1)
• MongoDB with Mongoose (v9.1.1)
• CORS for secure frontend-backend communication
• Dotenv for environment variable management
• Nodemon for development efficiency

Frontend

• React (v19)
• Vite (Build tool)
• CSS Modules & Modern CSS (Gradients, Flexbox, Grid)
• Fetch API for backend integration

📋 Prerequisites

• Node.js (v18+ recommended)
• MongoDB (Local instance or MongoDB Atlas)

⚡ Quick Start

1. Setup Backend

cd Backend
npm install
# Create a .env file and add:
# MONGO_URI=your_mongodb_connection_string
npm run seed  # Optional: Seed sample data
npm run dev   # Runs on http://localhost:3000

2. Setup Frontend

# In a new terminal
cd Frontend
npm install
npm run dev   # Runs on http://localhost:5173

🔌 API Endpoints Reference

Entity	Method	Endpoint	Description
Books	GET	/books	Get all books
Books	POST	/books	Create new book
Books	PATCH	/books/:id/copies	Update stock quantity
Books	DELETE	/books/:id	Delete book (if copies=0)
Customers	GET	/customers	Get all customers
Customers	POST	/customers	Register new customer

📁 Project Structure

.
├── Backend/                 # Express API
│   ├── models/              # Mongoose Schemas
│   ├── routes/              # API Route Handlers
│   └── seed.js              # Database Seeder
└── Frontend/                # React Vite App
    ├── src/
    │   ├── components/      # UI Components (Books/Customers)
    │   └── App.jsx          # Main App Logic