public static SubscriptionToken Subscribe <TEventBase>(Action <TEventBase> action) where TEventBase : EventBase
{
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
if (!Subscriptions.ContainsKey(typeof(TEventBase)))
{
Subscriptions.Add(typeof(TEventBase), new List <ISubscription>());
}
var token = new SubscriptionToken(typeof(TEventBase));
Subscriptions[typeof(TEventBase)].Add(new Subscription <TEventBase>(action, token));
return(token);
}
public static void Unsubscribe(SubscriptionToken token)
{
if (token == null)
{
throw new ArgumentNullException(nameof(token));
}
if (!Subscriptions.ContainsKey(token.EventItemType))
{
return;
}
var allSubscriptions = Subscriptions[token.EventItemType];
var subscriptionToRemove = allSubscriptions.FirstOrDefault(x => x.SubscriptionToken.Token == token.Token);
if (subscriptionToRemove != null)
{
Subscriptions[token.EventItemType].Remove(subscriptionToRemove);
}
}
public Subscription(Action <TEventBase> action, SubscriptionToken token)
{
_action = action ?? throw new ArgumentNullException(nameof(action));
SubscriptionToken = token ?? throw new ArgumentNullException(nameof(token));
}