public Action Subscribe(IMarketObserver observer)
{
if (_itemsForSale.Count > 0)
{
foreach (var(seller, items) in _itemsForSale)
{
foreach (var item in items)
{
observer.OnNext(seller, item);
}
}
}
_observers.Add(observer);
return(() => {
if (_observers.Contains(observer))
{
_observers.Remove(observer);
}
});
}
public void RemoveObserver(IMarketObserver observer)
{
_observerList.Remove(observer);
}
public void AddObserver(IMarketObserver observer)
{
_observerList.Add(observer);
}
