public void ObserveSingle <T>(FirebaseEventDelegate <T> handler)
{
var rootNode = databaseReference;
rootNode.ObserveSingleEvent(DataEventType.Value, (snapshot) =>
{
if (snapshot.Exists)
{
FirebaseXamarinHelper.RunOnUIThread(() =>
{
var data = snapshot.GetValue();
var snapData = DataConverter.Convert <T>(data, GetObjectFromHandler(handler));
SetObjectFromHandler(handler, snapData);
handler.OnSnapshot(snapData);
});
}
else
{
handler?.OnError?.Invoke(new SnapshotNotFoundException());
}
}, (error) =>
{
handler?.OnError?.Invoke(new FirebaseException(error));
});
}
public object Observe<T>(FirebaseEventDelegate<T> handler)
{
var listener = new TypeValueListener<T>(handler);
query.AddValueEventListener(listener);
return listener;
}
public TypeValueListener(FirebaseEventDelegate <T> eventDelegate)
{
this.eventDelegate = eventDelegate;
}
public StringValueListener(FirebaseEventDelegate eventDelegate)
{
this.eventDelegate = eventDelegate;
}
public void ObserveSingle <T>(string path, FirebaseEventDelegate <T> handler)
{
GetChild(path).ObserveSingle <T>(handler);
}
public object Observe <T>(string path, FirebaseEventDelegate <T> handler)
{
return(GetChild(path).Observe <T>(handler));
}
public void ObserveSingle<T>(FirebaseEventDelegate<T> handler)
{
query.AddListenerForSingleValueEvent(new TypeValueListener<T>(handler));
}