A JavaFX-based GUI bookstore management system developed as part of a group project for a course. The application simulates a bookstore used by both owners and customers, incorporating Object-Oriented Design, UML modeling, and the State Design Pattern.

Objectives:

• Analyze, design, and implement a functional bookstore management application.
• Apply UML modeling to visualize system structure and relationships.
• Use the State Design Pattern to manage dynamic system behavior.

Owner Features

• Log in using admin / admin credentials.
• Manage bookstore inventory (add, delete, and view books).
• Manage customer accounts (add, delete, and view customers).
• Log out to return to the main login screen.
• Data automatically saved to books.txt and customers.txt on exit.

Customer Features

• Log in with pre-registered credentials.
• View available books, prices, and select items for purchase.
• Purchase books using standard payment or redeem accumulated points.
• Earn points for each purchase (10 points per $1 spent).
• Achieve Silver (<1000 points) or Gold (≥1000 points) status.
• Data updates automatically on exit.