private async Task <ObservableCollection <EntitiesBase.YouTubeVideo> > LoadData(int pageNumber, bool forceRecaching = false)
{
var storedItems = _storageService.Load <ObservableCollection <EntitiesBase.YouTubeVideo> >("Videos_s5");
var storedCollection = storedItems != null?storedItems.ToList() : new List <EntitiesBase.YouTubeVideo>();
var pageNotSaved = Math.Ceiling(storedCollection.Count() / (double)MaxResults) - 1 < pageNumber;
if (_internetService.IsNetworkAvailable() && (pageNotSaved || forceRecaching))
{
var newItems = await _youtubeDataSource.LoadRemote <IEnumerable <EntitiesBase.YouTubeVideo> >(String.Format(YoutubeBaseUrl + YoutubePaginationParameters, HttpUtility.UrlEncode(YoutubeQuery), pageNumber *MaxResults + 1, MaxResults));
if (forceRecaching)
{
storedCollection = new List <EntitiesBase.YouTubeVideo>();
}
if (newItems != null && newItems.Any())
{
storedCollection.AddRange(newItems);
_storageService.Save("Videos_s5", new ObservableCollection <EntitiesBase.YouTubeVideo>(storedCollection));
}
}
return(new ObservableCollection <EntitiesBase.YouTubeVideo>(storedCollection.Skip(pageNumber * MaxResults).Take(MaxResults)));
}
/// <summary>
/// Retrieves the data from a RSS data source (http://www.dandandin.it/Blog/RSS.aspx?p=1~2~-1&r=f3a58073-d9c8-496e-af7b-f4ee2ae8dd40), in an observable collection of RssSearchResult items.
/// </summary>
/// <returns>An observable collection of RssSearchResult items.</returns>
public async Task <ObservableCollection <EntitiesBase.RssSearchResult> > Refresh()
{
SyndicationFeed feed;
if (_internetService.IsNetworkAvailable())
{
feed = await _xmlDataSource.LoadRemote <System.ServiceModel.Syndication.SyndicationFeed>(RssUrl);
var defaultImage = feed.ImageUrl != null ? feed.ImageUrl.AbsoluteUri : null;
var items = feed != null ? new ObservableCollection <EntitiesBase.RssSearchResult>(feed.Items.Select(i => new EntitiesBase.RssSearchResult(i, defaultImage))) : new ObservableCollection <EntitiesBase.RssSearchResult>();
_storageService.Save("Web_RSS", items);
return(items);
}
return(_storageService.Load <ObservableCollection <EntitiesBase.RssSearchResult> >("Web_RSS"));
}