private async Task CreateCategoryItem(ImageMetaData imageMetaData)
{
Func<Task<IBitmap>> lazyImageFactory = () => downloadManager.DownloadImage(imageMetaData.imageThumbnail);
var category = new CategoryItem(imageMetaData.imageUrl, imageMetaData.Category, lazyImageFactory);
CategoryItems.Add(category);
await category.LoadImage();
}
private ImageMetaData CreateImageMetaData(rssChannelItem rssChannelItem)
{
var html = rssChannelItem.description;
var imageUrl = GetImageUrl(html);
var imageMetaData = new ImageMetaData(imageUrl) { Category = rssChannelItem.title };
return imageMetaData;
}
public async Task<BitmapImage> GetImage(ImageMetaData imageMetaData, bool getThumbnail = false)
{
var imageStream = await GetImageStream(imageMetaData);
//BECAUSE WP8 SAID SO
BitmapImage image = new BitmapImage();
image.SetSource(imageStream);
return image;
}
public async Task<Stream> GetImageStream(ImageMetaData imageMetaData, bool getThumbnail = false)
{
byte[] imageBytes = null;
bool shouldGet = false;
string url = getThumbnail ? imageMetaData.imageThumbnail : imageMetaData.imageUrl;
try
{
imageBytes = await BlobCache.LocalMachine.GetAsync(url);
}
catch (Exception e)
{
shouldGet = true;
}
if (shouldGet)
{
imageBytes = await queue.Enqueue(1, async () =>
{
using (var client = new HttpClient())
{
byte[] tempimageBytes = null;
try
{
tempimageBytes = await client.GetByteArrayAsync(url);
await BlobCache.LocalMachine.Insert(url, tempimageBytes);
}
catch (Exception e)
{
//MessageBox.Show("Please check your network connection");
}
return tempimageBytes;
}
});
}
var imageStream = new MemoryStream(imageBytes);
return imageStream;
}