public LoginViewModel(TeamWithUser model, IScreen screen = null)
{
HostScreen = screen ?? Locator.Current.GetService<IScreen>();
Model = model;
var canLogin = this.WhenAny(x => x.Password, x => !String.IsNullOrWhiteSpace(x.Value));
Login = ReactiveCommand.CreateAsyncTask(canLogin, async _ => {
// CoolStuff: Here, we're using Fusillade to set up our
// HttpClient. We're indicating that this operation is user-initiated,
// so that it will take priority over any background operations.
var client = new HttpClient(NetCache.UserInitiated) {
BaseAddress = new Uri("https://slack.com"),
};
// CoolStuff: We're using Refit here to auto-implement our Slack API
// client.
var api = RestService.For<ISlackApi>(client);
var result = await api.Login(Model.user_id, Model.team_id, Password);
// CoolStuff: We'll handle this exception in ThrownExceptions when
// we throw a UserError
if (!result.ok) {
throw new Exception("Result not ok!");
}
return result.token;
});
// Whenever we get a successful token result, we're going to navigate
// to the ChannelViewModel to display a room.
Login.Subscribe(token =>
HostScreen.Router.NavigateAndReset.Execute(new ChannelViewModel(token, model.team_id)));
Login.ThrownExceptions.Subscribe(ex => {
// CoolStuff: UserErrors are like "exceptions meant for users".
// We can throw them in ViewModels, and let Views handle them by
// displaying UI. We're being lazy here, but UserErrors are a
// great way to ensure your users have a great app experience
// when things go wrong
UserError.Throw("Couldn't log in - check your password", ex);
});
}
public LoginTeamTileViewModel(TeamWithUser model, IScreen hostScreen = null)
{
hostScreen = hostScreen ?? Locator.Current.GetService<IScreen>();
Model = model;
// CoolStuff: Here, we're creating a Command whose sole job is to
// use the Router to navigate us to a new page.
LoginToThisTeam = ReactiveCommand.CreateAsyncObservable(_ =>
hostScreen.Router.Navigate.ExecuteAsync(new LoginViewModel(model, hostScreen)));
}