/// <summary>
/// Loads the cache from disk
/// </summary>
/// <returns>RSSCache as it was persisted</returns>
public static RSSCache Load()
{
RSSCache cache = null;
using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
{
using (IsolatedStorageFileStream stream = new IsolatedStorageFileStream("rssCache.dat", System.IO.FileMode.OpenOrCreate, file))
{
if (stream.Length > 0)
{
App.Log("Reading cache from file");
DataContractSerializer serializer = new DataContractSerializer(typeof(RSSCache));
cache = serializer.ReadObject(stream) as RSSCache;
}
}
}
// File was not found, create a new cache
if (cache == null)
{
App.Log("Creating a new cache");
cache = new RSSCache();
}
return(cache);
}
/// <summary>
/// Parses the OPML file and returns it as a list of RSSPages
/// </summary>
/// <param name="stream">The OPML file stream</param>
/// <returns>List of RSSPages</returns>
private static List <RSSPage> ParseOPML(Stream stream)
{
RSSCache cache = GetDataModel();
List <RSSPage> rssCategories = null;
if (cache.Cache.Count == 0)
{
XDocument xDocument = XDocument.Load(stream);
// XML parsed using Linq
rssCategories = (from outline in xDocument.Descendants("outline")
where outline.Attribute("xmlUrl") == null
select new RSSPage()
{
Title = outline.Attribute("title").Value,
Feeds = (from o in outline.Descendants("outline")
select new RSSFeed
{
URL = o.Attribute("xmlUrl").Value,
ImageURL = "/Resources/rss-icon.jpg",
Title = o.Attribute("title").Value,
IsVisible = true
}).ToList <RSSFeed>()
}).ToList <RSSPage>();
}
return(rssCategories);
}
/// <summary>
/// Initializes the feeds. Called from App.xaml.cs
/// when the application starts
/// </summary>
public static void InitializeFeeds()
{
RSSCache pages = GetDataModel();
CachedItems = RSSCache.Load();
foreach (RSSPage page in CachedItems.Cache)
{
pages.Cache.Add(page);
}
CachedItems = pages;
if (CachedItems.Cache.Count == 0)
{
FirstLaunch();
}
}