/// <summary>
/// Remove the subscriber for the given magazine.
/// </summary>
/// <param name="magazineName"></param>
/// <param name="subscriber"></param>
public void Unsubscribe(string magazineName, MagazineSubscriber subscriber)
{
if (!_subscribers.ContainsKey(magazineName) || !_subscribers[magazineName].Contains(subscriber))
{
Console.WriteLine($"{subscriber.Name} was not subscribed to {magazineName}.");
}
_subscribers[magazineName].Remove(subscriber);
Console.WriteLine($"{subscriber.Name} is no longer subscribed to {magazineName}.");
}
/// <summary>
/// Subscribe the subscriber to the given magazine.
/// </summary>
/// <param name="magazineName"></param>
/// <param name="subscriber"></param>
public void Subscribe(string magazineName, MagazineSubscriber subscriber)
{
if (!_subscribers.ContainsKey(magazineName))
{
_subscribers[magazineName] = new HashSet <MagazineSubscriber>();
}
if (_subscribers[magazineName].Contains(subscriber))
{
Console.WriteLine($"{subscriber.Name} cannot subscribe to {magazineName} more than once.");
}
else
{
_subscribers[magazineName].Add(subscriber);
Console.WriteLine($"{subscriber.Name} has been subscribed to {magazineName}.");
}
}