35 lines
900 B
C#
35 lines
900 B
C#
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public class Publisher : IPublisher
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{
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public int IssueNumber { get; set; } = 0;
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private List<ISubscriber> _subscribers = new List<ISubscriber>();
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public void Subscribe(ISubscriber subscriber)
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{
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Console.WriteLine($"Publisher: {subscriber.Name} just subscribed");
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_subscribers.Add(subscriber);
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}
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public void Unsubscribe(ISubscriber subscriber)
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{
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_subscribers.Remove(subscriber);
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Console.WriteLine($"Publisher: {subscriber.Name} just unsubscribed");
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}
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public void Notify()
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{
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Console.WriteLine("Publisher: Notify subscribers...");
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foreach (var subscriber in _subscribers)
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{
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subscriber.Update(this);
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}
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}
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public void PublishNewsletter()
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{
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this.IssueNumber++;
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Console.WriteLine($"Published #{this.IssueNumber} of Newsletter");
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this.Notify();
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}
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}
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