void IMessenger.Unsubscribe <T>(MessageSubscription subscription)
{
if (_subscriptions.ContainsKey(typeof(T)))
{
SubscriptionHolder holder = _subscriptions[typeof(T)].SingleOrDefault(x => x.Handle == subscription.Handle);
if (holder != null)
{
_subscriptions[typeof(T)].Remove(holder);
}
}
}
public MessageSubscription Subscribe <T>(Action <T> onDelivery) where T : IMessage
{
Action <IMessage> callback = onDelivery as Action <IMessage>;
int handle = -1;
if (_subscriptions.ContainsKey(typeof(T)))
{
handle = _subscriptions[typeof(T)].Count + 1;
_subscriptions[typeof(T)].Add(new SubscriptionHolder(handle, callback));
}
else
{
List <SubscriptionHolder> list = new List <SubscriptionHolder>();
handle = 1;
list.Add(new SubscriptionHolder(handle, callback));
_subscriptions.Add(typeof(T), list);
}
MessageSubscription sub = new MessageSubscription(handle);
return(sub);
}