ContentReader for Compressed (+read content for provider)

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

@@ -5,43 +5,40 @@ using FileTime.Core.Timeline;
 
 namespace FileTime.Tools.VirtualDiskSources;
 
-public class VirtualDiskContentProvider : SubContentProviderBase, IVirtualDiskContentProvider
+public sealed class VirtualDiskContentProvider : SubContentProviderBase, IVirtualDiskContentProvider
 {
     private readonly IContentAccessorFactory _contentAccessorFactory;
 
     public VirtualDiskContentProvider(
-        IContentProvider parentContentProvider,
         ITimelessContentProvider timelessContentProvider,
-        IContentAccessorFactory contentAccessorFactory)
-        : base(parentContentProvider, "virtual-disk", timelessContentProvider)
+        IContentAccessorFactory contentAccessorFactory,
+        IContentProvider parentContentProvider)
+        : base(
+            timelessContentProvider, 
+            contentAccessorFactory, 
+            parentContentProvider, 
+            "virtual-disk"
+        )
     {
         _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);
-
+        var parentElementContext = await GetParentElementReaderAsync(element);
+        var reader = parentElementContext.ContentReader;
+        var subPath = parentElementContext.SubNativePath.Path;
+        
         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();
+        return data[..readAsync].ToArray();
     }
 
     public override VolumeSizeInfo? GetVolumeSizeInfo(FullName path)