//Copies files from LocalCache to SharedLocal
private async Task CopyLocalCacheToSharedLocal(ApplicationDataCompositeValue argFeedSubscription)
{
try
{
string feedUriString = argFeedSubscription.ElementAt(1).Value.ToString();
string folderName = CreateValidFilename(feedUriString);
IStorageItem myLocalCacheIStorageItem = await ApplicationData.Current.LocalCacheFolder.TryGetItemAsync(folderName);
IStorageItem mySharedLocalIStorageItem = ApplicationData.Current.SharedLocalFolder;
//If I have cached files and policy allows me to access SharedLocalFolder
if (myLocalCacheIStorageItem != null && mySharedLocalIStorageItem != null)
{
StorageFolder myLocalCacheFolder = (StorageFolder)myLocalCacheIStorageItem;
StorageFolder mySharedLocalFolder = await ApplicationData.Current.SharedLocalFolder.CreateFolderAsync(folderName, CreationCollisionOption.OpenIfExists);
//Delete everything in SharedLocal before copying new
IReadOnlyList <StorageFile> fileListSharedLocal = await mySharedLocalFolder.GetFilesAsync();
foreach (StorageFile file in fileListSharedLocal)
{
await file.DeleteAsync();
}
//Copy every file from LocalCache to SharedLocal
IReadOnlyList <StorageFile> fileListLocalCache = await myLocalCacheFolder.GetFilesAsync();
foreach (StorageFile file in fileListLocalCache)
{
await file.CopyAsync(mySharedLocalFolder, file.Name, NameCollisionOption.ReplaceExisting);
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
//Loads cached content for a given subscription
private async Task LoadFeedCache(ApplicationDataCompositeValue argFeedSubscription)
{
try
{
feedsCollection.Clear();
string folderName = CreateValidFilename(argFeedSubscription.ElementAt(1).Value.ToString());
StorageFolder myStorageFolder = null;
//If cache folder for subscription exists
if (Directory.Exists(ApplicationData.Current.LocalCacheFolder.Path + "\\" + folderName))
{
myStorageFolder = await ApplicationData.Current.LocalCacheFolder.GetFolderAsync(folderName);
}
else if (Directory.Exists(ApplicationData.Current.SharedLocalFolder.Path + "\\" + folderName))
{
myStorageFolder = await ApplicationData.Current.SharedLocalFolder.GetFolderAsync(folderName);
}
if (myStorageFolder != null)
{
IReadOnlyList <StorageFile> fileList = await myStorageFolder.GetFilesAsync();
foreach (StorageFile file in fileList)
{
SyndicationItem mySyndicationItem = new SyndicationItem();
BitmapImage myBitmapImage = null;
//TODO change .com to something more solid, this will break if we are getting feeds from not .com site
//If the file is an article
if (file.FileType.ToString() == ".")
{
Windows.Data.Xml.Dom.XmlDocument myXmlDocument = await Windows.Data.Xml.Dom.XmlDocument.LoadFromFileAsync(file);
mySyndicationItem.LoadFromXml(myXmlDocument);
var thumbnails = myXmlDocument.GetElementsByTagName("thumbnail");
if (thumbnails.Count > 1)
{
string thumbnailUriString = thumbnails[1].Attributes[1].InnerText;
if (thumbnailUriString.EndsWith(".jpg"))
{
Uri uriForImage = new Uri(thumbnailUriString);
string imageFileName = CreateValidFilename(thumbnailUriString);
if (imageFileName.Length > 50)
{
imageFileName = imageFileName.Substring(imageFileName.Length - 50);
}
myBitmapImage = new BitmapImage(new System.Uri(myStorageFolder.Path + "\\" + imageFileName));
}
}
else
{
Regex rgx = new Regex(@"<img.*src=""(.*)""");
MatchCollection matches = rgx.Matches(mySyndicationItem.Summary.Text);
if (matches.Count > 0)
{
string stringForImage = matches[0].Groups[1].Value;
//If Uri has & parameters remove them
stringForImage = RemoveAmpFromUri(stringForImage);
Uri uriForImage = new Uri(stringForImage);
string imageFileName = CreateValidFilename(uriForImage.ToString());
if (imageFileName.Length > 50)
{
imageFileName = imageFileName.Substring(imageFileName.Length - 50);
}
imageFileName = AddExtension(imageFileName);
myBitmapImage = new BitmapImage(new System.Uri(myStorageFolder.Path + "\\" + imageFileName));
}
}
CustomRSSItem myCustomRSSItem = new CustomRSSItem(mySyndicationItem, myBitmapImage);
feedsCollection.Insert(0, myCustomRSSItem);
}
}
articlesListView.ItemsSource = feedsCollection;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
//Download content for a subscription, save it to LocalCache and add it to the collection
private async Task CacheFeed(ApplicationDataCompositeValue argFeedSubscription)
{
try
{
SyndicationClient client = new SyndicationClient();
client.SetRequestHeader("user-agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36");
string feedUriString = argFeedSubscription.ElementAt(1).Value.ToString();
SyndicationFeed feed = await client.RetrieveFeedAsync(new Uri(feedUriString));
if (feed != null)
{
feedsCollection.Clear();
//Cache my content cache files to LocalCache inside per feed folder
//Create folder if it does not exist
string folderName = CreateValidFilename(feedUriString);
StorageFolder myStorageFolder = await ApplicationData.Current.LocalCacheFolder.CreateFolderAsync(folderName, CreationCollisionOption.OpenIfExists);
//Delete any old files in folder
IReadOnlyList <StorageFile> fileListLocalCache = await myStorageFolder.GetFilesAsync();
foreach (StorageFile file in fileListLocalCache)
{
await file.DeleteAsync();
}
ApplicationDataContainer localSettings = ApplicationData.Current.LocalSettings;
int postLimit = int.Parse(localSettings.Values["#postsToDownload"].ToString());
//Cache every article
foreach (SyndicationItem mySyndicationItem in feed.Items)
{
//Do not cache more posts that specified by user setting
if (feedsCollection.Count == postLimit)
{
break;
}
CustomRSSItem myCustomRSSItem = null;
//Cache posts
string articleFileName = "";
Regex rgx1 = new Regex(@".*/(.+)");
MatchCollection matches1 = rgx1.Matches(mySyndicationItem.Id);
if (matches1.Count > 0)
{
articleFileName = CreateValidFilename(matches1[0].Groups[1].Value);
var xmlDoc = mySyndicationItem.GetXmlDocument(SyndicationFormat.Atom10);
IStorageFile myIStorageFile = await myStorageFolder.CreateFileAsync(articleFileName, CreationCollisionOption.ReplaceExisting);
await xmlDoc.SaveToFileAsync(myIStorageFile);
//Download and cache images
BitmapImage myBitmapImage = null;
//Get image from thumbnail element
var thumbnails = xmlDoc.GetElementsByTagName("thumbnail");
if (thumbnails.Count > 1)
{
string thumbnailUriString = thumbnails[1].Attributes[0].InnerText;
if (thumbnailUriString.EndsWith(".jpg"))
{
Uri uriForImage = new Uri(thumbnailUriString);
string imageFileName = CreateValidFilename(thumbnailUriString);
if (imageFileName.Length > 50)
{
imageFileName = imageFileName.Substring(imageFileName.Length - 50);
}
HttpClient httpClient = new HttpClient();
httpClient.DefaultRequestHeaders.Add("user-agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36");
IBuffer myIBuffer = await httpClient.GetBufferAsync(uriForImage);
IStorageFile myImageFile = await myStorageFolder.CreateFileAsync(imageFileName, CreationCollisionOption.OpenIfExists);
Stream stream = await myImageFile.OpenStreamForWriteAsync();
stream.Write(myIBuffer.ToArray(), 0, myIBuffer.ToArray().Length);
myBitmapImage = new BitmapImage(new Uri(myImageFile.Path));
await stream.FlushAsync();
}
}
else
//Retrieve .jpg from img link from summary text
{
Regex rgx = new Regex(@"<img.*src=""(.*)""");
MatchCollection matches = rgx.Matches(mySyndicationItem.Summary.Text);
if (matches.Count > 0)
{
string stringForImage = matches[0].Groups[1].Value;
//If Uri has & parameters remove them
stringForImage = RemoveAmpFromUri(stringForImage);
Uri uriForImage = new Uri(stringForImage);
string imageFileName = CreateValidFilename(uriForImage.ToString());
if (imageFileName.Length > 50)
{
imageFileName = imageFileName.Substring(imageFileName.Length - 50);
}
imageFileName = AddExtension(imageFileName);
HttpClient httpClient = new HttpClient();
IBuffer myIBuffer = await httpClient.GetBufferAsync(uriForImage);
IStorageFile myImageFile = await myStorageFolder.CreateFileAsync(imageFileName, CreationCollisionOption.ReplaceExisting);
Stream stream = await myImageFile.OpenStreamForWriteAsync();
stream.Write(myIBuffer.ToArray(), 0, myIBuffer.ToArray().Length);
myBitmapImage = new BitmapImage(new Uri(myImageFile.Path));
}
}
if (myBitmapImage != null)
{
//If we have an RSSItem and an image, add them to collection
myCustomRSSItem = new CustomRSSItem(mySyndicationItem, myBitmapImage);
feedsCollection.Add(myCustomRSSItem);
}
}
}
articlesListView.ItemsSource = feedsCollection;
//Copy what was just cached to SharedLocal
Task t = CopyLocalCacheToSharedLocal(argFeedSubscription);
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
}