public PodcastViewModel(Podcast podcast)
{
this.Podcast = podcast;
this._episodes = new ObservableCollection<EpisodeViewModel>();
var episodes = podcast.Episodes.Select(ep => new EpisodeViewModel(ep));
foreach (var episode in episodes)
{
episode.Episode.Podcast = podcast;
_episodes.Add(episode);
}
}
public Episode(System.Xml.Linq.XElement element, Podcast podcast)
{
XNamespace itunes = "http://www.itunes.com/dtds/podcast-1.0.dtd";
Name = element.Element("title").Value;
WebPath = WebPath = element.Element("enclosure").Attribute("url").Value;
Author = element.Element(itunes + "author").Value;
IsLocal = false;
Published = element.Element("pubDate").Value.ToDateTime();
ImageUrl = element.Element(itunes + "image") != null ? new Uri(element.Element(itunes + "image").Attribute("href").Value) : podcast.ImageUrl;
Summary = element.Element(itunes + "summary") != null ? element.Element(itunes + "summary").Value : null;
Description = element.Element("description") != null ? element.Element("description").Value : null;
Podcast = podcast;
}
public Episode(System.Xml.Linq.XElement element, Podcast podcast)
{
XNamespace itunes = "http://www.itunes.com/dtds/podcast-1.0.dtd";
Name = element.Element("title").Value;
WebPath = WebPath = element.Element("enclosure").Attribute("url").Value;
Author = element.Element(itunes + "author").Value;
IsLocal = false;
Published = element.Element("pubDate").Value.ToDateTime();
ImageUrl = element.Element(itunes + "image") != null ? new Uri(element.Element(itunes + "image").Attribute("href").Value) : podcast.ImageUrl;
Summary = element.Element(itunes + "summary") != null?element.Element(itunes + "summary").Value : null;
Description = element.Element("description") != null?element.Element("description").Value : null;
Podcast = podcast;
}
public static async Task<Podcast> LoadPodcastAsync(Uri url)
{
try
{
var httpClient = new HttpClient();
var xml = await httpClient.GetStringAsync(url);
var xmlDocument = XDocument.Parse(xml);
var channelTitle = xmlDocument.Element("rss").Element("channel").Element("title").Value;
XNamespace itunes = "http://www.itunes.com/dtds/podcast-1.0.dtd";
var elements = xmlDocument.Element("rss").Element("channel").Elements("item");
var description = xmlDocument.Element("rss").Element("channel").Element("description").Value;
var imageUrl = xmlDocument.Element("rss").Element("channel").Element(itunes + "image").Attribute("href").Value;
var author = xmlDocument.Element("rss").Element("channel").Element(itunes + "author").Value;
var podcast = new Podcast
{
FeedUrl = url,
Name = channelTitle,
ImageUrl = new Uri(imageUrl),
Author = author,
Description = description,
DateAdded = DateTime.Now
};
var episodes = new List<Episode>();
foreach (var element in elements)
{
var episode = new Episode(element, podcast);
episodes.Add(episode);
}
podcast.Episodes = episodes.OrderByDescending(episode => episode.Published).ToList();
return podcast;
}
catch
{
return null;
}
}
public static async Task<IList<Episode>> GetPodcastEpisodesFromStorageAsync(Podcast podcast)
{
var podcasts = await GetPodcastsFromStorageAsync();
return podcasts.Where(p => p.Name == podcast.Name).SingleOrDefault().Episodes;
}