public AlbumListViewModel(IFacebookPhotoService photoService = null, IViewStackService viewStackService = null)
: base(viewStackService)
{
photoService = photoService ?? Locator.Current.GetService <IFacebookPhotoService>();
LoadAlbums = ReactiveCommand.CreateFromTask(
async() =>
{
var albumData = await photoService.GetAlbumsAsync(Config.Constants.FACEBOOK_PAGE_ID, Config.Constants.FACEBOOK_PAGE_ACCESS_TOKEN, default(CancellationToken));
var viewModels = new List <AlbumCellViewModel>(albumData.Data.Count);
foreach (var model in albumData.Data)
{
var vm = new AlbumCellViewModel(model);
viewModels.Add(vm);
}
return(viewModels);
});
_albums = LoadAlbums
.SubscribeOn(RxApp.TaskpoolScheduler)
.ToProperty(this, vm => vm.Albums, scheduler: RxApp.MainThreadScheduler);
this
.WhenAnyValue(vm => vm.SelectedItem)
.Where(x => x != null)
.SelectMany(x => LoadSelectedPage(x))
.Subscribe();
LoadAlbums
.ThrownExceptions
.Subscribe(ex => this.Log().WarnException("Failed to load albums", ex));
}
private IObservable <Unit> LoadSelectedPage(AlbumCellViewModel viewModel)
{
return(ViewStackService.PushPage(new AlbumViewModel(viewModel.FacebookAlbum.Id)));
}
