public static List<FeedItemSummary> SummarizeFeed(IFeed feed, ParentFeed parentFeed, int itemCount = 3)
{
return feed.Items.Reverse().Skip(Math.Max(0, feed.Items.Count - itemCount)).Select(feedItem => new FeedItemSummary
{
DatePublished = feedItem.DatePublished,
Link = feedItem.Link,
ParentFeed = parentFeed,
Title = feedItem.Title
}).OrderByDescending(x => x.DatePublished).ToList();
}
public static List<FeedItemSummary> SummarizeFeed(IFeed feed, int itemCount = 3)
{
var parentFeed = new ParentFeed {FeedUri = feed.FeedUri, Link = feed.Link, Title = feed.Title, LastUpdated = DateTime.UtcNow};
return SummarizeFeed(feed, parentFeed, itemCount);
}
private void ExecuteQuery(ParentFeed feed, bool bind = false)
{
_remoteQueryService.BeginQueryFeeds(feed.FeedUri, async =>
{
var feedResult = _remoteQueryService.EndQueryFeeds(async);
var feedItemSummaries = FeedSummarizer.SummarizeFeed(feedResult, feed, feedResult.Items.Count);
//Synchronize access to the cache
lock (_cacheLock)
{
//Cache the processed feed to memory
if (CacheDictionary.ContainsKey(feedResult.FeedUri))
CacheDictionary.Remove(feedResult.FeedUri);
CacheDictionary.Add(feedResult.FeedUri,
new KeyValuePair<DateTime, IList<FeedItemSummary>>(DateTime.UtcNow,
feedItemSummaries));
}
//Perform a UI bind update if one is requested
if (bind)
{
UpdateBindings(feedItemSummaries);
DispatcherHelper.CheckBeginInvokeOnUI(() => { IsLoading = false; });
}
});
}
