using System;

using System.Collections.Generic;

​

​

namespace ConsoleApplication16

{

    public class Program

    {

        public static void Main(string[] args)

        {

             Queue<Customer> CustQue = new Queue<Customer>();

             CustQue.Enqueue(new Customer() {FirstName="Sam",LastName="Smith",CurrentMeal= Customer.Meal.none});

             CustQue.Enqueue(new Customer() { FirstName = "Mandy", LastName = "Cole", CurrentMeal = Customer.Meal.none });

             CustQue.Enqueue(new Customer() { FirstName = "Andrew", LastName = "White", CurrentMeal = Customer.Meal.none });

             CustQue.Enqueue(new Customer() { FirstName = "James", LastName = "Dewsbury", CurrentMeal = Customer.Meal.none });

             CustQue.Enqueue(new Customer() { FirstName = "Malcolm", LastName = "Unwin", CurrentMeal = Customer.Meal.none });

​

             Table T = new Table();

​

              foreach(var e in CustQue)

              {

                  T.TableOpen += e.TableListener;

                  T.TableEvent();

                  e.MealChanged += MealListener;

                  while (e.CurrentMeal != Customer.Meal.done)

                  {

                      e.Eat();

                  }

                  T.TableOpen -= e.TableListener;

              }

              Console.ReadLine();

        }

        public static void MealListener(object sender, MealEventArgs e)

        {

            Customer Cust=(Customer)sender;

            Console.WriteLine("{0}{1} is having a {2}", Cust.FirstName, Cust.LastName, Cust.CurrentMeal);  

        }

    }

​

    public class Table

    {

        public delegate void TableOpenEventHandler(object sender, TableEventArgs e);

        public event TableOpenEventHandler TableOpen;

        public void TableEvent()

        {

            if (TableOpen!=null)

            {

                Console.WriteLine("Table is Open");

                TableOpen(this, new TableEventArgs());

            }

        }

    }

​

    public class TableEventArgs: EventArgs

    {

​

    }

    public class Customer

    {

        public string FirstName { get; set; }

        public string LastName { get; set; }

        public Meal CurrentMeal { get; set; }

        public enum Meal {none, appetizer, main, desert, done}

        public Customer()

        {

            this.CurrentMeal = Meal.none;

            //Console.WriteLine("{0}{1} got a table", this.FirstName, this.LastName);

        }

        public void TableListener(object sender, TableEventArgs e)

        {

            Console.WriteLine("{0}{1} got a table", this.FirstName, this.LastName);  

        }

        public void Eat()

        {

           switch(this.CurrentMeal)

           {

               case Meal.none:

                   CurrentMeal = Meal.appetizer;

                   break;

               case Meal.appetizer:

                   CurrentMeal = Meal.main;

                   break;

               case Meal.main:

                   CurrentMeal = Meal.desert;

                   break;

               case Meal.desert:

                   CurrentMeal = Meal.done;

                   break;

           }

           MealEvent();

        }

        public delegate void MealChangedEventHandler(object sender, MealEventArgs e);

        public event MealChangedEventHandler MealChanged;

        public void MealEvent()

        {

        if (MealChanged != null)

        {

            //Console.WriteLine("{0}{1} is having a {3}",this.FirstName, this.LastName,this.CurrentMeal);

            MealChanged(this, new MealEventArgs());

        }           

        }

    }

    public class MealEventArgs : EventArgs

    {

​

    }

​

​

}