public IListenerRegistration AddSnapshotListener(DocumentSnapshotHandler listener)
{
var registration = _documentReference.AddSnapshotListener(new EventHandlerListener <DocumentSnapshot>((value, error) =>
{
listener?.Invoke(value == null ? null : new DocumentSnapshotWrapper(value),
error == null ? null : ExceptionMapper.Map(error));
}));
return(new ListenerRegistrationWrapper(registration));
}
public IListenerRegistration AddSnapshotListener(DocumentSnapshotHandler listener)
{
var registration = _documentReference.AddSnapshotListener((snapshot, error) =>
{
listener?.Invoke(snapshot == null ? null : new DocumentSnapshotWrapper(snapshot),
error == null ? null : ExceptionMapper.Map(error));
});
return(new ListenerRegistrationWrapper(registration));
}
public static Task <T> GetDocumentAsync <T>(this DocumentReference reference) where T : class
{
var tcs = new TaskCompletionSource <T>();
reference
.AddSnapshotListener((snapshot, error) =>
{
if (error != null)
{
tcs.SetException(new Exception(error.LocalizedDescription));
return;
}
tcs.SetResult(Cast <T>(snapshot));
});
return(tcs.Task);
}
