/// <summary>
/// Mostly useful for testing
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source"></param>
/// <param name="timeout"></param>
/// <returns></returns>
public static IObservable <IList <T> > ToListAsync <T>(this IObservable <T> source, TimeSpan?timeout = null)
{
source.AssertNotNull(nameof(source));
return(source
.Timeout(timeout.GetValueOrDefault(TimeSpan.FromSeconds(3)))
.Buffer(int.MaxValue)
.FirstAsync());
}
public ExerciseViewModel(ISchedulerService schedulerService, Exercise model, IObservable<ExecutionContext> executionContext)
{
schedulerService.AssertNotNull(nameof(schedulerService));
model.AssertNotNull(nameof(model));
executionContext.AssertNotNull(nameof(executionContext));
this.disposables = new CompositeDisposable();
this.model = model;
executionContext
.ObserveOn(schedulerService.MainScheduler)
.Subscribe(x => this.ExecutionContext = x)
.AddTo(this.disposables);
Observable
.CombineLatest(
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(ec => ec == null ? Observable.Never<TimeSpan>() : ec.WhenAnyValue(x => x.SkipAhead))
.Switch(),
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(ec => ec == null ? Observable.Never<Exercise>() : ec.WhenAnyValue(x => x.CurrentExercise))
.Switch(),
(skip, current) => skip == TimeSpan.Zero && current == this.model)
.ObserveOn(schedulerService.MainScheduler)
.Subscribe(x => this.IsActive = x)
.AddTo(this.disposables);
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(
ec =>
ec == null
? Observable.Return(TimeSpan.Zero)
: ec
.WhenAnyValue(x => x.CurrentExerciseProgress)
.Where(_ => ec.CurrentExercise == this.model)
.StartWith(TimeSpan.Zero))
.Switch()
.ObserveOn(schedulerService.MainScheduler)
.Subscribe(x => this.ProgressTimeSpan = x)
.AddTo(this.disposables);
this
.WhenAny(
x => x.Duration,
x => x.ProgressTimeSpan,
(duration, progressTimeSpan) => progressTimeSpan.Value.TotalMilliseconds / duration.Value.TotalMilliseconds)
.Select(progressRatio => double.IsNaN(progressRatio) || double.IsInfinity(progressRatio) ? 0d : progressRatio)
.Select(progressRatio => Math.Min(1d, progressRatio))
.Select(progressRatio => Math.Max(0d, progressRatio))
.ObserveOn(schedulerService.MainScheduler)
.Subscribe(x => this.Progress = x)
.AddTo(this.disposables);
}
public ExerciseViewModel(ISchedulerService schedulerService, Exercise model, IObservable <ExecutionContext> executionContext)
{
schedulerService.AssertNotNull(nameof(schedulerService));
model.AssertNotNull(nameof(model));
executionContext.AssertNotNull(nameof(executionContext));
this.disposables = new CompositeDisposable();
this.model = model;
executionContext
.ObserveOn(schedulerService.MainScheduler)
.Subscribe(x => this.ExecutionContext = x)
.AddTo(this.disposables);
Observable
.CombineLatest(
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(ec => ec == null ? Observable.Never <TimeSpan>() : ec.WhenAnyValue(x => x.SkipAhead))
.Switch(),
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(ec => ec == null ? Observable.Never <Exercise>() : ec.WhenAnyValue(x => x.CurrentExercise))
.Switch(),
(skip, current) => skip == TimeSpan.Zero && current == this.model)
.ObserveOn(schedulerService.MainScheduler)
.Subscribe(x => this.IsActive = x)
.AddTo(this.disposables);
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(
ec =>
ec == null
? Observable.Return(TimeSpan.Zero)
: ec
.WhenAnyValue(x => x.CurrentExerciseProgress)
.Where(_ => ec.CurrentExercise == this.model)
.StartWith(TimeSpan.Zero))
.Switch()
.ObserveOn(schedulerService.MainScheduler)
.Subscribe(x => this.ProgressTimeSpan = x)
.AddTo(this.disposables);
this
.WhenAny(
x => x.Duration,
x => x.ProgressTimeSpan,
(duration, progressTimeSpan) => progressTimeSpan.Value.TotalMilliseconds / duration.Value.TotalMilliseconds)
.Select(progressRatio => double.IsNaN(progressRatio) || double.IsInfinity(progressRatio) ? 0d : progressRatio)
.Select(progressRatio => Math.Min(1d, progressRatio))
.Select(progressRatio => Math.Max(0d, progressRatio))
.ObserveOn(schedulerService.MainScheduler)
.Subscribe(x => this.Progress = x)
.AddTo(this.disposables);
}
