public ExtendedSplashPageViewModel(
INavigationService navigationService,
IContainerRegistry containerRegistry,
IUserDataStore userDataStore,
IFirebaseAuthService firebaseAuthService) : base(navigationService)
{
const int Home = 1;
const int Login = 2;
Initialize = ReactiveCommand.CreateFromTask(async() =>
{
// make sure we're running this on a background thread
this.Log().Debug($"Loading projects on thread: {Thread.CurrentThread.ManagedThreadId}, IsBackground = {Thread.CurrentThread.IsBackground}");
AssertRunningOnBackgroundThread();
if (firebaseAuthService.IsUserSigned())
{
var currentUserId = firebaseAuthService.GetCurrentUserId();
if (string.IsNullOrWhiteSpace(currentUserId))
{
await firebaseAuthService.Logout();
return(Login);
}
// try to get the user from our database
var user = await userDataStore.GetUserById(currentUserId);
if (user == null)
{
await firebaseAuthService.Logout();
return(Login);
}
containerRegistry.RegisterInstance <IUserService>(new UserService(user));
return(Home);
}
return(Login);
});
Initialize
.SubscribeOn(RxApp.MainThreadScheduler)
.SelectMany(async nextPage =>
{
if (nextPage == Home)
{
await NavigationService.NavigateHomeAsync().ConfigureAwait(false);
}
else
{
await NavigationService.NavigateToLoginPageAsync().ConfigureAwait(false);
}
return(Observable.Return(Unit.Default));
})
.Subscribe();
// when the command is executing, update the busy state
Initialize.IsExecuting
.StartWith(false)
.ToProperty(this, x => x.IsBusy, out _isBusy);
Initialize.ThrownExceptions
.Subscribe(exception => System.Diagnostics.Debug.WriteLine($"Error: {exception}"));
}