private static async Task <IList <BlogGroup> > LoadLiveGroups()
{
var retVal = new List <BlogGroup>();
var info = NetworkInformation.GetInternetConnectionProfile();
if (info == null || info.GetNetworkConnectivityLevel() != NetworkConnectivityLevel.InternetAccess)
{
return(retVal);
}
var content = await PathIO.ReadTextAsync("ms-appx:///Assets/Blogs.js");
content = content.Trim(Utf8ByteOrderMark.ToCharArray());
var blogs = JsonArray.Parse(content);
foreach (JsonValue item in blogs)
{
MessageDialog dialog = null;
try
{
var uri = item.GetObject()["BlogUri"].GetString();
var group = new BlogGroup
{
Id = uri,
RssUri = new Uri(uri, UriKind.Absolute)
};
var client = GetSyndicationClient();
var feed = await client.RetrieveFeedAsync(group.RssUri);
group.Title = feed.Title.Text;
retVal.Add(group);
}
catch (Exception ex)
{
dialog = new MessageDialog(ex.Message);
}
if (dialog != null)
{
await dialog.ShowAsync();
}
}
return(retVal);
}
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())))
{
MessageDialog dialog = null;
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)
{
dialog = new MessageDialog(ex.Message);
}
if (dialog != null)
{
await dialog.ShowAsync();
}
cachedItems.Add(item);
group.NewItemCount++;
await StorageUtility.SaveItem(group.Id.GetHashCode().ToString(), item);
}
foreach (var item in cachedItems.OrderByDescending(i => i.PostDate))
{
group.Items.Add(item);
}
}
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 static async Task <IList <BlogItem> > LoadCachedItems(BlogGroup group)
{
var retVal = new List <BlogItem>();
var groupFolder = group.Id.GetHashCode().ToString();
foreach (var item in await StorageUtility.ListItems(groupFolder))
{
try
{
var post = await StorageUtility.RestoreItem <BlogItem>(groupFolder, item);
post.Group = group;
retVal.Add(post);
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
}
return(retVal);
}
private static async Task <List <BlogItem> > LoadLiveItems(BlogGroup group)
{
var info = NetworkInformation.GetInternetConnectionProfile();
if (info == null || info.GetNetworkConnectivityLevel() != NetworkConnectivityLevel.InternetAccess)
{
return(new List <BlogItem>());
}
MessageDialog dialog = null;
var retVal = new List <BlogItem>();
try
{
var client = GetSyndicationClient();
var feed = await client.RetrieveFeedAsync(group.RssUri);
foreach (var item in feed.Items.OrderBy(i => i.PublishedDate))
{
MessageDialog innerDialog = null;
try
{
var blogItem = new BlogItem {
Group = @group
};
var uri = string.Empty;
if (item.Links.Count > 0)
{
var link =
item.Links.FirstOrDefault(
l => l.Relationship.Equals("alternate", StringComparison.OrdinalIgnoreCase)) ??
item.Links[0];
uri = link.Uri.AbsoluteUri;
}
blogItem.Id = uri;
blogItem.PageUri = new Uri(uri, UriKind.Absolute);
blogItem.Title = item.Title != null ? item.Title.Text : "(no title)";
blogItem.PostDate = item.PublishedDate.LocalDateTime;
var content = "(no content)";
if (item.Content != null)
{
content = BlogUtility.ParseHtml(item.Content.Text);
}
else if (item.Summary != null)
{
content = BlogUtility.ParseHtml(item.Summary.Text);
}
blogItem.Description = content;
retVal.Add(blogItem);
}
catch (Exception ex)
{
innerDialog = new MessageDialog(ex.Message);
}
if (innerDialog != null)
{
await innerDialog.ShowAsync();
}
}
}
catch (Exception ex)
{
dialog = new MessageDialog(ex.Message);
}
if (dialog != null)
{
await dialog.ShowAsync();
}
return(retVal);
}