public TwitterTestViewModel(ITwitterService service = null)
{
_service = service ?? Resolver.Resolve <ITwitterService>();
this.WhenActivated(registerDisposable =>
{
var canLogoutOrGetProfile = _service.CurrentAccount.AsObservable().Select(account => null != account);
var canAuthorize = _service
.ServiceReadySub
.AsObservable()
.Select(authenticator => null != authenticator)
.CombineLatest(canLogoutOrGetProfile, (arg1, arg2) => arg1 && !arg2);
LogInCommand = ReactiveCommand.CreateAsyncObservable(canAuthorize, args => Observable.Start(() => _service.Authorize()));
LogOutCommand = ReactiveCommand.CreateAsyncObservable(canLogoutOrGetProfile, args => Observable.Start(async() => await _service.Logout()));
GetProfileCommand = ReactiveCommand.CreateAsyncObservable(canLogoutOrGetProfile, args => Observable.Start(() =>
{
IsLoaderShowing = true;
_service
.GetUserData()
.ObserveOnUI()
.Catch(ex =>
{
IsLoaderShowing = false;
Error = ex.Message;
}).SubscribeOnce(data =>
{
UserData = data;
IsLoaderShowing = false;
});
}));
});
}