public IPromise <T> Load <T>(ViewLink stageLink) where T : class, IStage
{
if (IsLoading.Value)
{
return(Promise <T> .Rejected(new InvalidOperationException("Already loading stage")));
}
isLoading.SetValue(true);
Promise <T> promise = Promise <T> .Create();
Promise loadPromise = Promise.Create();
App.Core.MakeTransition(loadPromise, () =>
{
if (ActiveStageLink != null && ActiveStageLink.GetPath() != stageLink.GetPath())
{
history.Push(ActiveStageLink);
ActiveStage.CloseStage(this);
}
void SetActive(ViewLink link, T stage)
{
ActiveStage = stage;
ActiveStageLink = link;
stage.OpenStage(this).Done(() =>
{
isLoading.SetValue(false);
loadPromise.Resolve();
promise.Resolve(stage);
if (loadedStages.ContainsKey(link) == false)
{
loadedStages.Add(link, stage);
}
OnStageLoaded(link);
});
}
if (loadedStages.ContainsKey(stageLink))
{
T loaded = loadedStages[stageLink] as T;
SetActive(stageLink, loaded);
}
else
{
App.Core.Views.CreateAsync <T>(stageLink).Done(stage =>
{
SetActive(stageLink, stage);
});
}
});
return(promise);
}
