// --------------------------------------------------------------------------------------------------------------------
public VirtualDirectoryNode CreateDirectory(string name)
{
_CheckDisposed();
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentException(PathUtils.NOT_NULL_EMPTY_OR_WHITESPACE_MSG, nameof(name));
}
if (PathUtils.HasInvalidPathChars(name))
{
throw new InvalidOperationException($"Directory name '{name}' is not valid.");
}
if (FileOrDirectoryExists(name, out var key))
{
throw new InvalidOperationException($"A file or directory already exists with the name '{name}'.");
}
var dir = new VirtualDirectoryNode(this, name);
_SubDirectories[key] = dir;
dir.DirectoryAdded.Event += _OnSubDirectoryAdded;
dir.DirectoryDeleted.Event += _OnSubDirectoryDeleted;
DirectoryAdded.Raise(dir);
return(dir);
}
///// <summary> Gets the root watcher used to register other watchers for this file system. </summary>
///// <value> The root watcher. </value>
//x public RootVirtualFileSystemWatcher RootWatcher => Root._RootWatcher;
//x RootVirtualFileSystemWatcher _RootWatcher;
// --------------------------------------------------------------------------------------------------------------------
/// <summary> Constructs a new directory entry. If parent is null, then this entry is considered the root entry. </summary>
/// <exception cref="ArgumentException"> Thrown when 'name' is null, empty, or only whitespace. </exception>
/// <param name="parent"> The parent directory. </param>
/// <param name="name"> The name. </param>
public VirtualDirectoryNode(VirtualDirectoryNode parent, string name)
{
_Parent = parent;
_Name = name;
FileAdded = new WeakEventHandler <VirtualDirectoryNode, VirtualFileInfo>(this);
FileDeleted = new WeakEventHandler <VirtualDirectoryNode, VirtualFileInfo>(this);
FileChanged = new WeakEventHandler <VirtualDirectoryNode, VirtualFileInfo>(this);
}
/// <summary>
/// Initializes a new instance of the CoreXT.MVC.VirtualFileProvider class using the specified volume name, hosting
/// environment information, and optional base directory path.
/// </summary>
/// <exception cref="ArgumentNullException"> Thrown when one or more required arguments are null. </exception>
/// <param name="volumeName">
/// The virtual file system volume that contains the file. Volumes are stored statically in memory by this name. If the
/// volume doesn't exist a new one will be created.
/// </param>
/// <param name="hostingEnvironment">
/// The hosting environment which is the context in which to search for content files. If provided, and a physical files exists, it will be used
/// </param>
/// <param name="basePath"> (Optional) Full pathname of the base file. </param>
public VirtualFileProvider(string volumeName, IHostingEnvironment hostingEnvironment, string basePath = null)
{
VolumeName = volumeName?.Trim() ?? throw new ArgumentNullException(nameof(volumeName));
HostingEnvironment = hostingEnvironment;
lock (_Volumes)
{
VolumeRoot = _Volumes.Value(VolumeName) ?? (_Volumes[VolumeName] = new VirtualDirectoryNode(null, "\\"));
}
}
// --------------------------------------------------------------------------------------------------------------------
/// <summary> Constructor. </summary>
/// <exception cref="ArgumentNullException"> Thrown when one or more required arguments are null. </exception>
/// <exception cref="ArgumentException"> Thrown when one or more arguments have unsupported or illegal values. </exception>
/// <param name="directory"> The parent directory. </param>
/// <param name="filename"> Filename of the file. </param>
internal VirtualFileInfo(VirtualDirectoryNode directory, string filename)
{
Changed = new WeakEventHandler <VirtualFileInfo, VirtualFileInfo>(this);
Disposed = new WeakEventHandler <VirtualFileInfo, VirtualFileInfo>(this);
_Directory = directory ?? throw new ArgumentNullException(nameof(directory));
_Name = filename;
_Data = new VirtualFileData(this);
_Data.Changed += d => Changed.Raise(this);
_Data.Disposed += d => Disposed.Raise(this);
}
// --------------------------------------------------------------------------------------------------------------------
/// <summary> Deletes a sub-directory and returns the deleted directory. </summary>
/// <param name="dir"> The sub-directory to delete. </param>
/// <returns> The deleted VirtualDirectoryNode, or null if not found. </returns>
public VirtualDirectoryNode DeleteDirectory(VirtualDirectoryNode dir)
{
_CheckDisposed();
if (dir?.IsDisposed == false && _SubDirectories.Remove(dir.Key))
{
dir.Delete();
return(dir);
}
else
{
return(null); // (not found)
}
}
// --------------------------------------------------------------------------------------------------------------------
/// <summary> Gets a directory relative to the current directory using a slash-delimited path ('/' or '\' will work). </summary>
/// <exception cref="InvalidOperationException"> Thrown when the requested operation is invalid. </exception>
/// <param name="path"> Full path of the file directory. </param>
/// <param name="createIfNotExists">
/// (Optional) True to create any missing directory entries. If false, null is returned if the directory was not found.
/// </param>
/// <returns> The directory if found, or null otherwise. </returns>
public VirtualDirectoryNode GetDirectory(string path, bool createIfNotExists)
{
_CheckDisposed();
if ((path[0] == '\\' || path[0] == '/') && this != Root)
{
return(Root.GetDirectory(path, createIfNotExists)); // (request search at the root level; send upwards)
}
var names = path?.Trim().Split('/', '\\') ?? new string[0];
VirtualDirectoryNode dir = this, nextDir = null;
for (var i = 0; i < names.Length; ++i)
{
var name = names[i].Trim();
if (!string.IsNullOrWhiteSpace(name))
{
var entryKey = VirtualFileInfo.CreateKey(name);
nextDir = dir._SubDirectories.Value(entryKey);
if (nextDir == null)
{
if (createIfNotExists)
{
if (_Files.ContainsKey(entryKey))
{
throw new InvalidOperationException($"Cannot create directory '{path}' - a directory already exists by the name '{name}' in '{dir.FullName}'.");
}
nextDir = new VirtualDirectoryNode(this, name)
{
_Key = entryKey
};
_SubDirectories[entryKey] = nextDir;
}
else
{
return(null); // (not found)
}
}
dir = nextDir;
}
}
return(dir);
}
private void _OnSubDirectoryDeleted(VirtualDirectoryNode origin, VirtualDirectoryNode dir)
{
DirectoryDeleted.Raise(dir);
_Parent?._OnSubDirectoryDeleted(this, dir);
}
