public static ProgressObserver <WorkDoneProgressReport> CreateWorkDoneProgress(
IResponseRouter router,
ISerializer serializer,
WorkDoneProgressBegin begin, Func <Exception, WorkDoneProgressEnd> onError,
Func <WorkDoneProgressEnd> onComplete,
CancellationToken cancellationToken)
{
var token = new ProgressToken(Guid.NewGuid().ToString());
var earlyEvents = new AsyncSubject <List <WorkDoneProgress> >();
var observer = new Subject <WorkDoneProgress>();
var disposable = new CompositeDisposable {
observer, earlyEvents
};
var worker = CreateWorker <WorkDoneProgress>(token, router, serializer, onError, onComplete, disposable);
disposable.Add(
observer
.Scan(new List <WorkDoneProgress>()
{
begin
}, (acc, v) =>
{
acc.Add(v);
return(acc);
})
.Subscribe(earlyEvents.OnNext)
);
disposable.Add(
Observable.FromAsync(ct => router.CreateProgress(token, ct))
.Subscribe(_ => { }, e => { }, () => { earlyEvents.OnCompleted(); })
);
disposable.Add(
earlyEvents
.SelectMany(z => z)
.Concat(observer)
.Subscribe(worker)
);
return(new ProgressObserver <WorkDoneProgressReport>(token, observer,
CancellationTokenSource.CreateLinkedTokenSource(cancellationToken)));
}