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using System;
using System.Collections.Generic;
namespace OpenClosedPrincipleExample
{
class Program
{
static void Main(string[] args)
{
var customerMessages = new List<Message>
{
new SendTextMessage(new Customer {Id = 1, FirstName = "Nick", Phone = "1-303-666-9999" }),
new SendEmail(new Customer {Id = 2, FirstName = "Billy", Email = "billy@bojenkins.com"}),
new SendTextMessage(new Customer {Id = 2, FirstName = "Jenny", Phone = "1-201-867-5309"} )
};
foreach (var customerMessage in customerMessages)
{
customerMessage.SendMessage();
}
}
}
public class Customer
{
public int Id;
public string FirstName;
public string LastName;
public string Email;
public string Phone;
}
public abstract class Message
{
protected Customer Customer { get; private set; }
public Message(Customer customer)
{
Customer = customer;
}
public abstract void SendMessage();
}
public class SendTextMessage : Message
{
public SendTextMessage(Customer customer)
: base(customer)
{
}
public override void SendMessage()
{
//if there is a business rule for validation place here..
Console.WriteLine($"Sending {Customer.FirstName} a text message");
}
}
public class SendEmail : Message
{
public SendEmail(Customer customer)
: base(customer)
{
}
public override void SendMessage()
{
//same here previous example had validation of email.
Console.WriteLine($"Sending {Customer.FirstName} an email");
}
}
}
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