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));
});
}
private void HandleChange(FirebaseChildChangeEnum type, DataSnapshot snapshot, string previousChildName)
{
FirebaseXamarinHelper.RunOnUIThread(() =>
{
var snapData = DataConverter.Convert <T>(snapshot.Value, GetObjectFromHandler(eventDelegate));
eventDelegate.OnSnapshot(type, previousChildName, new KeyValuePair <string, T>(snapshot.Key, snapData));
SetObjectFromHandler(eventDelegate, snapData);
});
}
