/// <summary>
/// Retrieves the data from Youtube (channel: CNETTV ), filtered by a filter specification, in an observable collection of YouTubeVideo items.
/// </summary>
/// <param name="filter">Filter operation specification</param>
/// <returns>An observable collection of YouTubeVideo items.</returns>
public async Task <ObservableCollection <EntitiesBase.YouTubeVideo> > Search(FilterSpecification filter)
{
var data = _storageService.Load <EntitiesBase.YouTubeVideo[]>("Videos_s5");
var searchResults = RepositoriesBase.Filter <EntitiesBase.YouTubeVideo> .FilterCollection(filter, data);
if (searchResults == null || !searchResults.Any())
{
data = await _youtubeDataSource.LoadRemote <EntitiesBase.YouTubeVideo[]>(String.Format(YoutubeBaseUrl, HttpUtility.UrlEncode(YoutubeQuery)));
searchResults = RepositoriesBase.Filter <EntitiesBase.YouTubeVideo> .FilterCollection(filter, data);
}
return(searchResults);
}
