public async Task LoadAllItems(BlogGroup group)
{
var cachedItems = await LoadCachedItems(group);
group.ItemCount = cachedItems.Count;
group.NewItemCount = 0;
var newItems = await LoadLiveItems(group);
foreach (var item in newItems.Where(i => !cachedItems.Contains(i, new BaseItemComparer())))
{
var error = string.Empty;
try
{
var client = GetClient();
var page = await client.GetStringAsync(item.PageUri);
item.ImageUriList = new ObservableCollection <Uri>(BlogUtility.ExtractImagesFromPage(page));
foreach (var image in item.ImageUriList)
{
ImageUriManager.AddImage(item.Id, image);
}
}
catch (Exception ex)
{
error = ex.Message;
}
if (!string.IsNullOrEmpty(error))
{
await _dialog.ShowDialogAsync(error);
}
cachedItems.Add(item);
group.NewItemCount++;
await _storage.SaveItem(group.Id.GetHashCode().ToString(), item);
}
foreach (var item in cachedItems.OrderByDescending(i => i.PostDate))
{
foreach (var image in item.ImageUriList)
{
ImageUriManager.AddImage(item.Id, image);
}
group.Items.Add(item);
}
group.ItemCount = group.Items.Count();
}
private void LoadTestGroups()
{
var jeremyGroup = new BlogGroup
{
Id = JEREMY_BLOG,
PageUri = new Uri(JEREMY_BLOG, UriKind.Absolute),
Title = "Jeremy Likness' Blog",
RssUri =
new Uri("http://www.wintellect.com/CS/blogs/jlikness/rss.aspx",
UriKind.Absolute),
};
GroupList.Add(jeremyGroup);
var item = new BlogItem
{
Id =
SAMPLE_BLOG,
PageUri = new Uri(SAMPLE_BLOG, UriKind.Absolute),
Title = "Windows 8: The Facts about ARM, Metro, and the Blue Stack",
Description =
"Many eyes will be focused on Barcelona on February 29, 2012 when Microsoft releases the Windows 8 Consumer Preview or what many are calling the beta version of the new platform. You’ve probably heard quite a bit about the Metro interface. It has design...",
PostDate = DateTime.Now,
ImageUriList = new ObservableCollection <Uri>(new[]
{
new Uri(
"http://lh6.ggpht.com/-qhW3FfZ7vXI/TzScQ_3eEEI/AAAAAAAAAds/3en8ijjglEg/stacks_thumb%25255B1%25255D.jpg?imgmax=800",
UriKind.Absolute),
new Uri(
"http://lh5.ggpht.com/-mUJv5DN5sOQ/TzScRSjHfJI/AAAAAAAAAd8/XErEJslVnKI/stackclr_thumb%25255B1%25255D.png?imgmax=800",
UriKind.Absolute),
new Uri(
"http://lh3.ggpht.com/-yCXImOFtSrc/TzScR2uTZ-I/AAAAAAAAAeM/43a7SGj5Uwo/stacklanguage_thumb%25255B1%25255D.png?imgmax=800",
UriKind.Absolute)
}),
Group = jeremyGroup
};
jeremyGroup.Items.Add(item);
}
private async Task <IList <BlogItem> > LoadCachedItems(BlogGroup group)
{
var retVal = new List <BlogItem>();
var groupFolder = group.Id.GetHashCode().ToString();
foreach (var item in await _storage.ListItems(groupFolder))
{
try
{
var post = await _storage.RestoreItem <BlogItem>(groupFolder, item);
post.Group = group;
retVal.Add(post);
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
}
return(retVal);
}
private async Task <IList <BlogItem> > LoadLiveItems(BlogGroup group)
{
return(await _syndicationHelper.LoadItemsAsync(group));
}