/// <summary>
/// Subscribes an observer that observes multiple eventIDs to one callback.
/// </summary>
/// <param name="cb"></param>
/// <param name="eventIDs"></param>
public void Subscribe(EventSubscriberCB cb, params EventIDType[] eventIDs)
{
foreach (EventIDType propertyAlias in eventIDs)
{
Subscribe(cb, propertyAlias);
}
}
/// <summary>
/// Subscribes an observer that observes one eventID to a callback.
/// </summary>
/// <param name="eventID"></param>
/// <param name="cb"></param>
public void Subscribe(EventSubscriberCB cb, EventIDType eventID)
{
HashSet <EventSubscriberCB> subscriberCBSet;
if (!_registeredSubscriberCBMap.TryGetValue(eventID, out subscriberCBSet))
{
subscriberCBSet = new HashSet <EventSubscriberCB>();
}
subscriberCBSet.Add(cb);
_registeredSubscriberCBMap[eventID] = subscriberCBSet;
}
/// <summary>
/// Check if a observer's callback is subscribed with a eventID.
/// </summary>
/// <param name="cb"></param>
/// <returns></returns>
public bool IsSubscribedCB(EventSubscriberCB cb)
{
foreach (KeyValuePair <EventIDType, HashSet <EventSubscriberCB> > entry in _registeredSubscriberCBMap)
{
HashSet <EventSubscriberCB> cbSet = entry.Value;
if (cbSet.Contains(cb))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Unsubscribe a observer callback to an eventID. The pair must exist for this to be successful.
/// </summary>
/// <param name="eventID"></param>
/// <param name="cb"></param>
/// <returns>if the action succeed.</returns>
public bool Unsubscribe(EventSubscriberCB cb, EventIDType eventID)
{
if (_registeredSubscriberCBMap.ContainsKey(eventID))
{
HashSet <EventSubscriberCB> subscriberCBSet = _registeredSubscriberCBMap[eventID];
bool isSuccess = subscriberCBSet.Remove(cb);
if (subscriberCBSet.Count == 0)
{
_registeredSubscriberCBMap.Remove(eventID);
}
return(isSuccess);
}
return(false);
}
