Copy from ISO

src/Tools/FileTime.Tools.VirtualDiskSources/VirtualDiskContentProvider.cs

@@ -1,14 +1,50 @@
-using FileTime.Core.ContentAccess;
+using DiscUtils.Udf;
+using FileTime.Core.ContentAccess;
+using FileTime.Core.Models;
 using FileTime.Core.Timeline;
 
 namespace FileTime.Tools.VirtualDiskSources;
 
-public class VirtualDiskContentProvider : SubContentProviderBase
+public class VirtualDiskContentProvider : SubContentProviderBase, IVirtualDiskContentProvider
 {
+    private readonly IContentAccessorFactory _contentAccessorFactory;
+
     public VirtualDiskContentProvider(
-        IContentProvider parentContentProvider, 
-        ITimelessContentProvider timelessContentProvider) 
+        IContentProvider parentContentProvider,
+        ITimelessContentProvider timelessContentProvider,
+        IContentAccessorFactory contentAccessorFactory)
         : base(parentContentProvider, "virtual-disk", timelessContentProvider)
     {
+        _contentAccessorFactory = contentAccessorFactory;
     }
+
+    public override async Task<byte[]?> GetContentAsync(IElement element, int? maxLength = null, CancellationToken cancellationToken = default)
+    {
+        var elementNativePath = element.NativePath!;
+
+        var supportedPath = await ParentContentProvider.GetSupportedPathPart(elementNativePath);
+        if (supportedPath is null) return null;
+
+        var parentItem = await ParentContentProvider.GetItemByNativePathAsync(supportedPath, element.PointInTime);
+        if (parentItem is not IElement parentElement) return null;
+
+
+        var contentReaderFactory = _contentAccessorFactory.GetContentReaderFactory(parentElement.Provider);
+        var reader = await contentReaderFactory.CreateContentReaderAsync(parentElement);
+
+        await using var readerStream = reader.AsStream();
+        using var discReader = new UdfReader(readerStream);
+
+        var subPath = elementNativePath.Path.Substring(supportedPath.Path.Length + 2 + Constants.SubContentProviderRootContainer.Length);
+        var fileInfo = discReader.GetFileInfo(subPath);
+
+        await using var contentReader = fileInfo.Open(FileMode.Open, FileAccess.Read);
+        var data = new byte[1024 * 1024];
+        var readAsync = await contentReader.ReadAsync(data, cancellationToken);
+
+        return data[0..readAsync].ToArray();
+    }
+
+    public override VolumeSizeInfo? GetVolumeSizeInfo(FullName path)
+        => ParentContentProvider.GetVolumeSizeInfo(path);
 }