public PartialItemsRequestProgressObservable(
ISerializer serializer,
ProgressToken token,
IObservable <TResult> requestResult,
Func <IEnumerable <TItem>, TResult> factory,
CancellationToken cancellationToken,
Action onCompleteAction
)
{
_serializer = serializer;
_dataSubject = new ReplaySubject <IEnumerable <TItem> >(int.MaxValue, Scheduler.Immediate);
_disposable = new CompositeDisposable()
{
_dataSubject
};
_task = Observable.Create <TResult>(
observer => new CompositeDisposable()
{
_dataSubject
.Aggregate(
new List <TItem>(),
(acc, data) => {
acc.AddRange(data);
return(acc);
}
)
.Select(factory)
.ForkJoin(
requestResult
.Do(
result => _dataSubject.OnNext(result ?? Enumerable.Empty <TItem>()),
_dataSubject.OnError,
_dataSubject.OnCompleted
),
(items, result) => items?.Count() > result?.Count() ? items : result
)
.Subscribe(observer),
Disposable.Create(onCompleteAction)
}
)
.ToTask(cancellationToken);
ProgressToken = token;
}