public static FeedSubscriptionTree GetFeedSubscriptionTreeFromOpmlFile(string filepath)
{
XmlReaderSettings settings = new XmlReaderSettings();
settings.ConformanceLevel = ConformanceLevel.Auto;
settings.CloseInput = true;
settings.IgnoreComments = true;
settings.IgnoreProcessingInstructions = true;
settings.IgnoreWhitespace = true;
settings.ValidationType = ValidationType.None;
XmlDocument xmlDoc;
using (TextReader tr = new StreamReader(filepath))
{
XmlReader xr = XmlReader.Create(tr, settings);
xmlDoc = new XmlDocument();
xmlDoc.Load(xr);
}
FeedSubscriptionTree fst = new FeedSubscriptionTree();
foreach (XmlNode node in xmlDoc.ChildNodes)
{
processOpmlNode(fst, node, null);
}
return fst;
}
public static void ExportAsOpml(FeedSubscriptionTree fst, string filepath)
{
XElement root = new XElement("opml",
new XElement("head"));
XElement body = new XElement("body");
root.Add(body);
addNodesToParentNode(fst.RootLevelNodes, body);
root.Save(filepath);
}
public FeedSubTreeManager(string lFeedSubsFilePath, FeedsTreeView lFeedsTreeView, ToolStripButton lHideReadFeedsBTN)
{
feedSubsFilepath = lFeedSubsFilePath;
feedsTreeView = lFeedsTreeView;
hideReadFeedsBTN = lHideReadFeedsBTN;
feedsNormalFont = feedsTreeView.Font;
feedsBoldFont = new Font(feedsNormalFont, FontStyle.Bold);
if (File.Exists(feedSubsFilepath))
{
fst = FeedSubscriptionTree.GetFromFeedSubscriptionsFile(feedSubsFilepath);
BindTreeView();
}
else
{
fst = new FeedSubscriptionTree();
}
}
internal void ImportOpml(string filepath)
{
fst = Opml.GetFeedSubscriptionTreeFromOpmlFile(filepath);
fst.SaveAsFeedSubscriptionsFile(feedSubsFilepath);
BindTreeView();
}
internal void AddNewFolder(TreeNode parentNode)
{
FeedFolder parentFolder;
TreeNode newNode;
FeedFolder newFolder = new FeedFolder();
newFolder.Name = "New Folder";
if (fst == null)
{
//this is most likely a new user with no subscriptions who has chosen to start
//with a new folder
fst = new FeedSubscriptionTree();
}
if (parentNode == null)
{
newFolder.ParentFolder = null;
fst.RootLevelNodes.Add(newFolder);
newNode = feedsTreeView.Nodes.Add(newFolder.Name);
}
else
{
parentFolder = (FeedFolder)parentNode.Tag;
newFolder.ParentFolder = parentFolder;
parentFolder.ChildNodes.Add(newFolder);
newNode = parentNode.Nodes.Add(newFolder.Name);
}
newNode.Tag = newFolder;
SaveFeedSubTree();
}
private static void processOpmlNode(FeedSubscriptionTree fst, XmlNode node, FeedFolder currentParentFolder)
{
if (node.Name == null && node.Name.Length < 1)
{
return;
}
switch (node.Name.ToLower())
{
case "body":
case "opml":
case "xml":
foreach (XmlNode childNode in node.ChildNodes)
{
processOpmlNode(fst, childNode, currentParentFolder);
}
break;
case "outline":
processOpmlOutlineNode(fst, node, currentParentFolder);
break;
case "head":
return;
}
}
private static void processOpmlOutlineNode(FeedSubscriptionTree fst, XmlNode node, FeedFolder currentParentFolder)
{
FeedSubTreeNodeBase fstnb = FeedSubTreeNodeBase.GetFromOpmlXmlNode(node);
Type nodeType = fstnb.GetType();
if (nodeType == typeof(FeedSubscription))
{
FeedSubscription fs = fstnb as FeedSubscription;
fs.ParentFolder = currentParentFolder;
if (currentParentFolder == null)
{
//this feed sub is at the root level of the tree
fst.RootLevelNodes.Add(fs);
}
else
{
currentParentFolder.ChildNodes.Add(fs);
}
//Debug.WriteLine("Processed Sub Node: " + fs.DisplayName + ":" + currentParentFolder == null ? "root" : currentParentFolder.Name);
}
else if (nodeType == typeof(FeedFolder))
{
FeedFolder ff = fstnb as FeedFolder;
ff.ParentFolder = currentParentFolder;
if (currentParentFolder == null)
{
//this feed folder is at the root level of the tree
fst.RootLevelNodes.Add(ff);
}
else
{
currentParentFolder.ChildNodes.Add(ff);
}
foreach (XmlNode childNode in node.ChildNodes)
{
processOpmlNode(fst, childNode, ff);
}
}
else
{
throw new Exception("FeedSubscriptionTree.processOpmlOutlineNode error: Unrecognized node type: " + nodeType.ToString());
}
}