private void SubscriptionRemovedInternal <T>(KeySubscriptionContainer <T> container, T observer, string key) where T : class
{
if (SubscriptionRemoved != null)
{
var count = container.Count(key);
if (container.Count() == 0)
{
container.SubscriptionRemoved -= SubscriptionRemovedInternal;
Containers.Remove(container);
}
var arg = new SubscriptionArg(key, count, observer);
SubscriptionRemoved?.Invoke(arg);
}
}
public IDisposable AddObserver <T>(string key, T observer) where T : class
{
var container = Containers.OfType <KeySubscriptionContainer <T> >().FirstOrDefault();
if (container == null)
{
container = new KeySubscriptionContainer <T>();
Containers.Add(container);
container.SubscriptionRemoved += SubscriptionRemovedInternal;
}
var subscription = container.AddItem(key, observer);
var count = container.Count(key);
var arg = new SubscriptionArg(key, count, observer);
SubscriptionCreated?.Invoke(arg);
return(subscription);
}
