🍕 Pizza Ordering System

A comprehensive pizza ordering system implementing various design patterns to create a flexible, maintainable and feature-rich application.

🌟 Features

🛠 Pizza Customization

• Multiple crust options, sauces, toppings and cheese selections
• Custom pizza combinations with naming capability
• Chain of Responsibility pattern for processing customizations

🛍 Ordering Process

• Intuitive step-by-step ordering flow
• Support for delivery and pickup options
• Real-time delivery estimates using coordinates
• Builder pattern for complex order creation

👤 User Management

• Profile creation and management
• Saved favorite combinations
• Order history tracking
• One-click reordering of favorites

📍 Real-Time Tracking

• Live order status updates
• Push notifications for order stages
• State pattern for order status management
• Delivery/Pickup tracking with estimated times

💳 Payment & Loyalty

• Multiple payment methods:
  • Credit Card
  • Digital Wallet
  • PayPal
• Loyalty points system
• Points redemption for discounts
• Strategy pattern for payment processing

🎉 Promotions

• Seasonal discounts
• Holiday specials
• Extra toppings promotions
• Decorator pattern for special offers

⭐ Ratings & Feedback

• Order rating system
• Customer feedback collection
• Popular combinations showcase
• Command pattern for feedback actions

🏗 Design Patterns Used

1. Chain of Responsibility

   • Pizza customization handling
   • Order validation

2. Builder Pattern

   • Pizza construction
   • Order assembly

3. Observer Pattern

   • Order status notifications
   • Delivery updates

4. State Pattern

   • Order status management
   • Delivery tracking

5. Strategy Pattern

   • Payment processing
   • Delivery calculations

6. Decorator Pattern

   • Pizza customizations
   • Special offers

7. Command Pattern

   • Order operations
   • Feedback handling

🚀 Getting Started

Prerequisites

• Python 3.8+
• pip package manager

Installation

# Clone repository
git clone https://github.com/yourusername/pizza-ordering-system.git

# Install dependencies
pip install -r requirements.txt

# Run application
python main.py

Usage Example

from FOS.user_interface import UI
import asyncio

ui = UI()
asyncio.run(ui.main())

Architeture

FOS/
├── models/          # Data models
├── patterns/        # Design pattern implementations
├── services/        # Business logic
├── utils/          # Helper utilities
├── repositories/   # Data access
└── ui/            # User interface

✨ Features Showcase

Pizza Creation

pizza_builder = (
    PizzaBuilder()
    .set_crusts(["Thin"])
    .set_sauces(["Tomato"])
    .set_toppings(["Pepperoni"])
    .set_cheeses(["Mozzarella"])
    .build()
)

Payment Processing

payment = Payment(
    price=pizza.price,
    user=current_user,
    strategy=CreditCardStrategy()
)
payment.process_payment(use_loyalty=True)

Order Tracking

tracker = DeliveryTracker(store_coords, delivery_coords)
for status in tracker.track():
    print(f"Order Status: {status}")