/// <summary>
/// Creates View/ViewModel instances for the specified <paramref name="viewType"/> if they
/// haven't been created yet in the current flow
/// </summary>
/// <param name="viewType"></param>
/// <returns>true if the View/ViewModel didn't exist and had to be created</returns>
bool CreateViewAndViewModel(UIViewType viewType, [AllowNull] ViewWithData data = null)
{
var list = GetObjectsForFlow(activeFlow);
if (viewType == UIViewType.Login)
{
if (!list.ContainsKey(viewType))
{
var d = factory.CreateViewAndViewModel(UIViewType.TwoFactor);
list.Add(UIViewType.TwoFactor, d);
}
}
// 2fa view/viewmodel is created when login is created 'cause login needs the 2fa viewmodel
// so the only thing we want to do is connect the viewmodel to the view when it's showing
else if (viewType == UIViewType.TwoFactor)
{
var d = list[viewType];
if (d.View.ViewModel == null)
{
d.ViewModel.Initialize(data);
d.View.DataContext = d.ViewModel;
}
}
if (!list.ContainsKey(viewType))
{
var d = factory.CreateViewAndViewModel(viewType);
d.ViewModel.Initialize(data);
d.View.DataContext = d.ViewModel;
list.Add(viewType, d);
return(true);
}
return(false);
}
void RunView(UIViewType viewType, ViewWithData arg = null)
{
if (requestedTarget?.ViewType == viewType || (requestedTarget?.ViewType == UIViewType.None && requestedTarget?.MainFlow == CurrentFlow))
{
arg = requestedTarget;
}
if (arg == null)
{
arg = new ViewWithData {
ActiveFlow = activeFlow, MainFlow = selectedFlow, ViewType = viewType
}
}
;
bool firstTime = CreateViewAndViewModel(viewType, arg);
var view = GetObjectsForFlow(activeFlow)[viewType].View;
transition.OnNext(new LoadData
{
Flow = activeFlow,
View = view,
Data = arg
});
// controller might have been stopped in the OnNext above
if (IsStopped)
{
return;
}
// if it's not the first time we've shown this view, no need
// to set it up
if (!firstTime)
{
return;
}
SetupView(viewType, view.ViewModel);
}
void SetupView(UIViewType viewType, IViewModel viewModel)
{
var list = GetObjectsForFlow(activeFlow);
var pair = list[viewType];
var hasDone = viewModel as IHasDone;
var hasCancel = viewModel as IHasCancel;
// 2FA is set up when login is set up, so nothing to do
if (viewType == UIViewType.TwoFactor)
{
return;
}
// we're setting up the login dialog, we need to setup the 2fa as
// well to continue the flow if it's needed, since the
// authenticationresult callback won't happen until
// everything is done
if (viewType == UIViewType.Login)
{
var pair2fa = list[UIViewType.TwoFactor];
pair2fa.AddHandler(((IDialogViewModel)pair2fa.ViewModel).WhenAny(x => x.IsShowing, x => x.Value)
.Where(x => x)
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => Fire(Trigger.Next)));
pair2fa.AddHandler(((IHasCancel)pair2fa.ViewModel).Cancel
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => Fire(uiStateMachine.CanFire(Trigger.Cancel) ? Trigger.Cancel : Trigger.Finish)));
if (hasDone != null)
{
pair.AddHandler(hasDone.Done
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => Fire(Trigger.Finish)));
}
}
else if (hasDone != null)
{
pair.AddHandler(hasDone.Done
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => Fire(uiStateMachine.CanFire(Trigger.Next) ? Trigger.Next : Trigger.Finish)));
}
if (hasCancel != null)
{
pair.AddHandler(hasCancel.Cancel
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(_ => Fire(uiStateMachine.CanFire(Trigger.Cancel) ? Trigger.Cancel : Trigger.Finish)));
}
}
/// <summary>
/// Creates View/ViewModel instances for the specified <paramref name="viewType"/> if they
/// haven't been created yet in the current flow
/// </summary>
/// <param name="viewType"></param>
/// <returns>true if the View/ViewModel didn't exist and had to be created</returns>
bool CreateViewAndViewModel(UIViewType viewType, ViewWithData data = null)
{
var list = GetObjectsForFlow(activeFlow);
if (viewType == UIViewType.Login)
{
if (!list.ContainsKey(viewType))
{
var d = factory.CreateViewAndViewModel(UIViewType.TwoFactor);
list.Add(UIViewType.TwoFactor, d);
}
}
// 2fa view/viewmodel is created when login is created 'cause login needs the 2fa viewmodel
// so the only thing we want to do is connect the viewmodel to the view when it's showing
else if (viewType == UIViewType.TwoFactor)
{
var d = list[viewType];
if (d.View.ViewModel == null)
{
d.ViewModel.Initialize(data);
d.View.DataContext = d.ViewModel;
}
}
IUIPair pair = null;
var firstTime = !list.TryGetValue(viewType, out pair);
if (firstTime)
{
pair = factory.CreateViewAndViewModel(viewType);
}
pair.ViewModel.Initialize(data);
if (firstTime)
{
pair.View.DataContext = pair.ViewModel;
list.Add(viewType, pair);
}
return(firstTime);
}
/// <summary>
/// Returns the view/viewmodel pair for a given flow
/// </summary>
Dictionary <UIViewType, IUIPair> GetObjectsForFlow(UIControllerFlow flow)
{
Dictionary <UIViewType, IUIPair> list;
if (!uiObjects.TryGetValue(flow, out list))
{
list = new Dictionary <UIViewType, IUIPair>();
uiObjects.Add(flow, list);
}
return(list);
}
void Fire(Trigger next, ViewWithData arg = null)
{
Debug.WriteLine("Firing {0} from {1} ({2})", next, uiStateMachine.State, GetHashCode());
if (triggers.ContainsKey(next))
{
uiStateMachine.Fire(triggers[next], arg);
}
else
{
uiStateMachine.Fire(next);
}
}
UIViewType Go(Trigger trigger)
{
return(Go(trigger, activeFlow));
}
UIViewType Go(Trigger trigger, UIControllerFlow flow)
{
var m = machines[flow];
Debug.WriteLine("Firing {0} from {1} for flow {2} ({3})", trigger, m.State, flow, GetHashCode());
m.Fire(trigger);
return(m.State);
}
void Reset()
{
if (connectionAdded != null)
{
connectionManager.Connections.CollectionChanged -= connectionAdded;
}
connectionAdded = null;
var tr = transition;
var cmp = completion;
transition = null;
completion = null;
disposables.Clear();
tr?.Dispose();
cmp?.Dispose();
stopping = false;
connection = null;
}
bool disposed; // To detect redundant calls