🍰 Goldilocks POS System

A web-based functional programming Point of Sale (POS) system designed for Goldilocks cake shops 🏪.
Handles transactions with real-time cart updates, accurate change calculation, and optimal denomination breakdown — built with pure functions, immutability, and higher-order functions for scalability & efficiency.

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✨ Features

✅ Add cakes to cart by code or selection
✅ Real-time subtotal, tax, and total calculation
✅ Accurate change computation using greedy algorithm
✅ Suggests optimal change denominations (bills & coins)
✅ Receipt generation with transaction details
✅ Functional programming principles:

• Pure functions
• Immutability
• Higher-order functions
• Function composition
  ✅ Local Storage support to persist cart during page reloads
  ✅ Error handling for invalid codes, insufficient payment, or zero quantity

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🛠 Tech Stack

Frontend: HTML5, CSS3, JavaScript (ES6+), jQuery
Backend: PHP 8+, MySQL 8.0
Programming Paradigm: Functional Programming
Tools: VS Code, XAMPP/WAMP, GitHub
Security: Input validation, client-side error handling

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🚀 Quick Start

1. Clone repo

git clone https://github.com/PaulPaolo2929/Goldilocks-Point-of-Sale.git