/// <summary>
/// Update data properties in the view model by syncing with the server data.
/// </summary>
public async Task Update(bool justForLiveTile = false)
{
IsUpdateRequested = true;
_gotResponseEver = false;
_isDataLoadedPartially = false;
Debug.WriteLine("!!! Updating feed data: MainVM.Update");
// Set up the Feed Service.
if (_feedService != null)
{
DataLayer.SetFeedService(_feedService);
}
else
{
DataLayer.SetDefaultFeedService();
}
var categoryModels = await DataLayer.GetCategoriesAsync();
var appDealsCategory = await GetAppDealsCategory();
var categoryVMs = new ObservableCollection<CategoryViewModel>();
if (categoryModels.Count > 0)
{
_gotResponseEver = true;
Debug.WriteLine("Got response ever");
}
try
{
for (int i = 0; i < categoryModels.Count; i++)
{
var category = categoryModels[i];
var categoryViewModel = new CategoryViewModel(category);
//
// TODO:Carousal feature is disabled in V1. Enable if we want the carousal functionality.
//
//if (i == 0)
//{
// // Only the first module, we want the carousal
// categoryViewModel.SetCarousalInterval(CategoryViewModel.CarousalInterval.Daily);
//}
await categoryViewModel.Update(justForLiveTile);
if (categoryViewModel.HasAlbum())
{
categoryViewModel.PropertyChanged += CategoryPropertyChanged;
categoryVMs.Add(categoryViewModel);
}
}
}
catch (DataLayerFeedException ex)
{
// Notify UI that this is partial data.
_isDataLoadedPartially = true;
}
_mainImage = categoryModels[0].ImageUrl;
// Clean up old Category VMs and event handlers.
if (_categoryViewModels != null && _categoryViewModels.Count > 0)
{
foreach (var categoryViewModel in _categoryViewModels)
{
categoryViewModel.PropertyChanged -= CategoryPropertyChanged;
}
_categoryViewModels.Clear();
}
//Append Music Apps category to collection
if (null != appDealsCategory) categoryVMs.Add(appDealsCategory);
_categoryViewModels = categoryVMs;
_isDataLoaded = true;
_isDataLoadedPartially = false;
Debug.WriteLine("Main VM - Categories are updated");
OnPropertyChanged("CategoryViewModels");
OnPropertyChanged("IsDataLoaded");
}
private async Task<CategoryViewModel> GetAppDealsCategory()
{
var appDealsData = await _appStoreService.GetAppStoreDealsFeedDataAsync();
//Populate view model properties
if (appDealsData != null)
{
var appViewModels = new ObservableCollection<AppElementViewModel>();
foreach (var item in appDealsData.Items)
{
var appVM = new AppElementViewModel(item, _usePhoneFeed);
appViewModels.Add(appVM);
}
var categoryVM = new CategoryViewModel(appViewModels);
return categoryVM;
}
return null;
}
