public AuthViewModel()
{
Activator = new ViewModelActivator();
var canSignIn = this.WhenAnyValue(x => x.Username, x => x.Password,
(u, p) => !u.Empty() && !p.Empty());
this.WhenActivated(d => {
d(Avatar = ReactiveCommand.CreateAsyncObservable(_ => GetAvatar()));
d(SignIn = ReactiveCommand.CreateAsyncObservable(canSignIn, _ => Authenticate()));
d(Registration = ReactiveCommand.Create());
d(ResetPassword = ReactiveCommand.Create());
// External links
d(Registration.Subscribe(_ => Process.Start("http://hummingbird.me/users/sign_up")));
d(ResetPassword.Subscribe(_ => Process.Start("http://hummingbird.me/users/password/new")));
// Handle when signing in was successful
d(SignIn.Subscribe(token => {
// Save the correct user data to the secure cache
var account = Service.Get <Account>();
account.Username = Username;
account.Token = token;
account.Save();
// Sign in was successful, Tell the MainView to change the content view
MessageBus.Current.SendMessage(new MediaViewModel() as ReactiveObject, "Content");
}));
// Handle when an exception is thrown during the sign in process
d(SignIn.ThrownExceptions
.Select(x => {
if (x is ApiException)
{
var ex = x as ApiException;
if (ex.StatusCode == HttpStatusCode.Unauthorized)
{
return(new UserError("Check your credentials, and try again."));
}
}
return(new UserError("There was an issue authenticating with Hummingbird."));
})
.SelectMany(UserError.Throw)
.Subscribe(_ => {
// Error was thrown to the handler, empty out the credentials
Username = "";
Password = "";
// will set the avatar back to blank hummingbird
Avatar.Execute(null);
}));
// Execute the Avatar command so that the default image is set on the view
Avatar.Execute(null);
});
}
