private async Task <Page> GetRootPage(Type viewmodelType)
{
if (_cachedRoots.TryGetValue(viewmodelType, out var cachedRootPage))
{
return(cachedRootPage);
}
var pageType = _registry.GetPageType(viewmodelType);
Debug.Assert(pageType != null);
var rootPage = _rootPageFactory.CreateRootPage(pageType);
Debug.Assert(rootPage != null);
_cachedRoots[viewmodelType] = rootPage;
await InitializeRootPageViewmodel(rootPage);
return(rootPage);
}
public async Task PushAsync(Type viewModelType, object parameter)
{
if (viewModelType == null)
{
throw new ArgumentNullException(nameof(viewModelType));
}
var pageType = _registry.GetPageType(viewModelType);
Debug.Assert(pageType != null);
var page = _pageFactory.CreatePage(pageType);
Debug.Assert(page != null);
var initializationTask = page.InitializeViewmodelAsync(parameter);
var navigationTask = InternalPushAsync(page);
await Task.WhenAll(initializationTask, navigationTask);
_logger.LogDebug($"Successfully pushed a page of type {pageType.Name}!");
}