/// <summary>
/// </summary>
/// <param name="Path"></param>
public VirtualFileSystemNode InsertNode(string Path, DateTime CreateTime, object Metadata = null)
{
VirtualFileSystemNode ParentNode = Root;
string ParentPath = GetParentPath(Path);
if (ParentPath.Length > 0)
{
ParentNode = InsertNode(ParentPath, CreateTime);
}
string NodeName = GetNodeName(Path);
VirtualFileSystemNode Child = ParentNode.GetChildByName(NodeName);
if (Child == null)
{
Child = new VirtualFileSystemNode(NodeName, Path, CreateTime, ParentNode, Metadata);
ParentNode.Children.Add(Child);
ParentNode.SortChildren();
OnNodeAdded?.Invoke(this, Child);
}
else
{
Child.Metadata = Metadata;
}
return(Child);
}
/// <summary>
/// </summary>
/// <returns></returns>
public VirtualFileSystemNode GetNodeByPath(string Path)
{
if (Path.Length == 0)
{
RefreshNodeChildren(Root);
return(Root);
}
VirtualFileSystemNode ParentNode = Root;
string ParentPath = GetParentPath(Path);
if (ParentPath.Length > 0)
{
ParentNode = GetNodeByPath(ParentPath);
}
if (ParentNode == null)
{
return(null);
}
RefreshNodeChildren(ParentNode);
string NodeName = GetNodeName(Path);
return(ParentNode.GetChildByName(NodeName));
}
/// <summary>
/// </summary>
/// <param name="Naem"></param>
public VirtualFileSystemNode(string InName, string InPath, DateTime InCreateTime, VirtualFileSystemNode InParent = null, object InMetadata = null)
{
Name = InName;
Path = InPath;
Parent = InParent;
Metadata = InMetadata;
CreateTime = InCreateTime;
}
/// <summary>
/// </summary>
/// <param name="Node"></param>
private void RefreshNodeChildren(VirtualFileSystemNode Node)
{
ulong ElapsedTime = TimeUtils.Ticks - Node.LastChildRefreshTime;
if (Node.LastChildRefreshTime == 0 || ElapsedTime > ChildrenRefreshInterval && AutoRefreshChildren)
{
OnRequestChildren?.Invoke(this, Node.Path);
Node.LastChildRefreshTime = TimeUtils.Ticks;
}
}
/// <summary>
/// </summary>
/// <param name="Path"></param>
public void RemoveNode(string Path)
{
VirtualFileSystemNode Node = GetNodeByPath(Path);
if (Node != null && Node.Parent != null)
{
OnNodeRemoved?.Invoke(this, Node);
Node.Parent.Children.Remove(Node);
}
}
/// <summary>
/// </summary>
public void ForceRefresh(VirtualFileSystemNode Node = null)
{
if (Node == null)
{
Node = Root;
}
Node.LastChildRefreshTime = 0;
foreach (VirtualFileSystemNode Child in Node.Children)
{
ForceRefresh(Child);
}
}
/// <summary>
/// </summary>
/// <param name="Path"></param>
public void RemoveChildNodes(string Path)
{
VirtualFileSystemNode Node = GetNodeByPath(Path);
if (Node != null)
{
foreach (VirtualFileSystemNode Child in Node.Children)
{
OnNodeRemoved?.Invoke(this, Child);
}
Node.Children.Clear();
}
}
/// <summary>
/// </summary>
/// <param name="Path"></param>
public List <string> GetChildrenNames(string Path)
{
List <string> Result = new List <string>();
VirtualFileSystemNode Node = GetNodeByPath(Path);
if (Node != null)
{
RefreshNodeChildren(Node);
foreach (VirtualFileSystemNode Child in Node.Children)
{
Result.Add(Child.Path);
}
}
return(Result);
}
/// <summary>
/// </summary>
/// <param name="Path"></param>
/// <param name="Children"></param>
public void ReconcileChildren(string Path, List <VirtualFileSystemInsertChild> Children)
{
VirtualFileSystemNode BaseNode = GetNodeByPath(Path);
if (BaseNode == null)
{
BaseNode = InsertNode(Path, DateTime.UtcNow);
}
List <VirtualFileSystemNode> ChildrenToRemove = new List <VirtualFileSystemNode>();
List <VirtualFileSystemInsertChild> ChildrenToAdd = new List <VirtualFileSystemInsertChild>();
// Find children to remove.
foreach (VirtualFileSystemNode Child in BaseNode.Children)
{
bool Exists = false;
foreach (VirtualFileSystemInsertChild NewChild in Children)
{
if (Child.Path == NewChild.VirtualPath)
{
Exists = true;
break;
}
}
if (!Exists)
{
ChildrenToRemove.Add(Child);
}
}
// Find children to add.
foreach (VirtualFileSystemInsertChild NewChild in Children)
{
bool Exists = false;
foreach (VirtualFileSystemNode Child in BaseNode.Children)
{
if (Child.Path == NewChild.VirtualPath)
{
// Update metadata while we are here in case it changed.
Child.Metadata = NewChild.Metadata;
Child.CreateTime = NewChild.CreateTime;
OnNodeUpdated?.Invoke(this, Child);
Exists = true;
break;
}
}
if (!Exists)
{
ChildrenToAdd.Add(NewChild);
}
}
// Remove children.
foreach (VirtualFileSystemNode Child in ChildrenToRemove)
{
BaseNode.Children.Remove(Child);
}
// Add children.
List <VirtualFileSystemNode> NewChildren = new List <VirtualFileSystemNode>();
foreach (VirtualFileSystemInsertChild NewChild in ChildrenToAdd)
{
string NodeName = GetNodeName(NewChild.VirtualPath);
VirtualFileSystemNode Child = new VirtualFileSystemNode(NodeName, NewChild.VirtualPath, NewChild.CreateTime, BaseNode, NewChild.Metadata);
BaseNode.Children.Add(Child);
NewChildren.Add(Child);
}
/*
*
* foreach (VirtualFileSystemNode Child in ChildrenToRemove)
* {
* Console.WriteLine("PreSort: Remove: {0}", Child.Path);
* }
*
* foreach (VirtualFileSystemNode Child in NewChildren)
* {
* Console.WriteLine("PreSort: Add: {0}", Child.Path);
* }*/
// Sort all children by create time.
BaseNode.Children.Sort((Item1, Item2) => - Item1.CreateTime.CompareTo(Item2.CreateTime));
// Fire events.
foreach (VirtualFileSystemNode Child in ChildrenToRemove)
{
//Console.WriteLine("PostSort: Remove: {0}", Child.Path);
OnNodeRemoved?.Invoke(this, Child);
}
foreach (VirtualFileSystemNode Child in NewChildren)
{
//Console.WriteLine("PostSort: Add: {0}", Child.Path);
OnNodeAdded?.Invoke(this, Child);
}
}
public VirtualFileSystem()
{
Root = new VirtualFileSystemNode("", "", DateTime.UtcNow);
RefreshNodeChildren(Root);
}
