public FingerprintService(IObservable <Unit> applicationActivated, FuncAsync <string> description, IScheduler dispatcher, IScheduler backgroundScheduler, bool fallbackOnPasscodeAuthentication = false)
{
applicationActivated.Validation().NotNull(nameof(applicationActivated));
description.Validation().NotNull(nameof(description));
dispatcher.Validation().NotNull(nameof(dispatcher));
backgroundScheduler.Validation().NotNull(nameof(backgroundScheduler));
_description = description;
_dispatcher = dispatcher;
_asyncLock = new AsyncLock();
_isSupported =
applicationActivated
.ObserveOn(backgroundScheduler)
.StartWith(backgroundScheduler, Unit.Default)
.Select(_ => CheckSupport())
.Replay(1, backgroundScheduler)
.RefCount();
_isEnabled =
_isSupported
.Select(isSupported => isSupported && CheckEnrollment())
.Replay(1, backgroundScheduler)
.RefCount();
_fallbackOnPasscodeAuthentication = fallbackOnPasscodeAuthentication;
}
/// <summary>
/// Initializes a new instance of the <see cref="BiometryService" /> class.
/// </summary>
/// <param name="supported">A bool to know if the device is supported.</param>
/// <param name="enrolled">A bool to know if the device is enrolled.</param>
/// <param name="backgroundScheduler">The <see cref="IScheduler" /> to use.</param>
public BiometryService(bool supported, bool enrolled, IScheduler backgroundScheduler)
{
backgroundScheduler.Validation().NotNull(nameof(backgroundScheduler));
_keys = ApplicationData.Current.LocalSettings.Values;
_asyncLock = new AsyncLock();
_isSupported =
Observable.Never <bool>()
.StartWith(supported)
.Replay(1, backgroundScheduler)
.RefCount();
_isEnabled =
_isSupported
.Select(isSupported => isSupported && enrolled)
.Replay(1, backgroundScheduler)
.RefCount();
}
