OrderProcessor.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SDP_Project
{
    abstract class OrderProcessor
    {
        protected Order order;
        protected Restaurant restaurant;

        public OrderProcessor(Order order, Restaurant restaurant)
        {
            this.order = order;
            this.restaurant = restaurant;
        }
        public abstract double CalculateDeliveryPrice();
        public virtual double CalculatePrice()
        {
            double total = CalculateDeliveryPrice();
            total += order.Amount; 
            return total;
        }
        public abstract List<OrderItem> SelectItems();
        public abstract bool ValidateOrder();
        public abstract void ProcessOrder();
        public abstract void DeliverOrder();
    }

}