private static async Task <IDictionary <Guid, int> > UpdateDownloadedFeedsAsync(IDictionary <Guid, Feed> subscribedFeeds, string fileName, IPersistentManager dbContext)
{
var feedsUpdated = await dbContext.ReadSerializedCopyAsync <List <Feed> >(fileName);
if (feedsUpdated == null || feedsUpdated.Count == 0)
{
return(null);
}
var updatedFeeds = new Dictionary <Guid, int>();
feedsUpdated.ForEach(f =>
{
if (!subscribedFeeds.ContainsKey(f.Id))
{
return;
}
var persistentFeed = subscribedFeeds[f.Id];
var updatedItemCount = FeedHelper.UpdateFeedItems(persistentFeed, f.Items);
if (updatedItemCount > 0)
{
updatedFeeds.Add(persistentFeed.Id, updatedItemCount);
}
persistentFeed.LastUpdatedTime = f.LastUpdatedTime;
});
return(updatedFeeds);
}
public async Task <int> UpdateItemsAsync(Feed feed)
{
try
{
var updatedFeed = await GetFeedResultAsync(feed.Link.ToString());
if (updatedFeed == null || updatedFeed.Items.Count == 0)
{
return(0);
}
updatedFeed.Publisher.Id = feed.Publisher.Id;
TailorFeed(updatedFeed);
return(FeedHelper.UpdateFeedItems(feed, updatedFeed.Items));
}
catch (Exception ex)
{
throw new ApplicationException("feedUrl: " + feed.Link, ex);
}
}