public virtual Page CreatePage(Type viewType, MvxViewModelRequest request, MvxBasePresentationAttribute attribute)
{
var page = Activator.CreateInstance(viewType) as Page;
if (page is IMvxPage contentPage)
{
if (request is MvxViewModelInstanceRequest instanceRequest)
{
contentPage.ViewModel = instanceRequest.ViewModelInstance;
}
else
{
contentPage.ViewModel = ViewModelLoader.LoadViewModel(request, null);
}
}
if (attribute is MvxPagePresentationAttribute pageAttribute)
{
if (string.IsNullOrEmpty(page.Title) && !string.IsNullOrEmpty(pageAttribute.Title))
{
page.Title = pageAttribute.Title;
}
if (string.IsNullOrEmpty(page.Icon) && !string.IsNullOrEmpty(pageAttribute.Icon))
{
page.Icon = pageAttribute.Icon;
}
}
return(page);
}
protected async Task <MvxViewModelInstanceRequest> NavigationRouteRequest <TParameter>(
string path, TParameter param, IMvxBundle?presentationBundle = null)
where TParameter : notnull
{
ValidateArguments(path, param);
if (!TryGetRoute(path, out var entry))
{
throw new MvxException($"Navigation route request could not be obtained for path: {path}");
}
var regex = entry.Key;
var match = regex.Match(path);
var paramDict = BuildParamDictionary(regex, match);
var parameterValues = new MvxBundle(paramDict);
var viewModelType = entry.Value;
var request = new MvxViewModelInstanceRequest(viewModelType)
{
PresentationValues = presentationBundle?.SafeGetData(),
ParameterValues = parameterValues.SafeGetData()
};
if (viewModelType.GetInterfaces().Contains(typeof(IMvxNavigationFacade)))
{
var facade = (IMvxNavigationFacade)_iocProvider.IoCConstruct(viewModelType);
try
{
var facadeRequest = await facade.BuildViewModelRequest(path, paramDict).ConfigureAwait(false);
if (facadeRequest == null)
{
throw new MvxException($"{nameof(MvxNavigationService)}: Facade did not return a valid {nameof(MvxViewModelRequest)}.");
}
request.ViewModelType = facadeRequest.ViewModelType;
if (facadeRequest.ParameterValues != null)
{
request.ParameterValues = facadeRequest.ParameterValues;
}
request.ViewModelInstance = ViewModelLoader.LoadViewModel(request, param, null);
}
catch (Exception ex)
{
ex.MvxWrap($"{nameof(MvxNavigationService)}: Exception thrown while processing URL: {path} with RoutingFacade: {viewModelType}");
}
}
else
{
request.ViewModelInstance = ViewModelLoader.LoadViewModel(request, param, null);
}
return(request);
}
