private HierarchyNode GetOrAddDirectory(HierarchyNode node, List<KeyValuePair<HierarchyNode, HierarchyNode>> addedItems, string dir) {
var existingDir = node.FindImmediateChildByName(Path.GetFileName(dir));
if (existingDir == null) {
existingDir = CreateFolderNode(dir);
addedItems.Add(new KeyValuePair<HierarchyNode, HierarchyNode>(node, existingDir));
node.AddChild(existingDir);
}
return existingDir;
}
private void AddExistingDirectory(HierarchyNode node, string path, List<KeyValuePair<HierarchyNode, HierarchyNode>> addedItems) {
foreach (var dir in Directory.GetDirectories(path)) {
var existingDir = GetOrAddDirectory(node, addedItems, dir);
AddExistingDirectory(existingDir, dir, addedItems);
}
foreach (var file in Directory.GetFiles(path)) {
var existingFile = node.FindImmediateChildByName(Path.GetFileName(file));
if (existingFile == null) {
existingFile = CreateFileNode(file);
addedItems.Add(new KeyValuePair<HierarchyNode, HierarchyNode>(node, existingFile));
node.AddChild(existingFile);
}
}
}
