ContentReader for Compressed (+read content for provider)

src/Core/FileTime.Core.ContentAccess/Helper.cs

@@ -0,0 +1,22 @@
+using FileTime.Core.Models;
+
+namespace FileTime.Core.ContentAccess;
+
+internal static class Helper
+{
+    internal static async Task<ParentElementReaderContext> GetParentElementReaderAsync(
+        IContentAccessorFactory contentAccessorFactory, 
+        IElement element, 
+        IContentProvider parentContentProvider)
+    {
+        var elementNativePath = element.NativePath!;
+        var supportedPath = (await parentContentProvider.GetSupportedPathPart(elementNativePath))!;
+        var parentElement = (IElement) await parentContentProvider.GetItemByNativePathAsync(supportedPath, element.PointInTime);
+
+        var contentReaderFactory = contentAccessorFactory.GetContentReaderFactory(parentElement.Provider);
+        var reader = await contentReaderFactory.CreateContentReaderAsync(parentElement);
+        var subPath = new NativePath(elementNativePath.Path.Substring(supportedPath.Path.Length + 2 + Constants.SubContentProviderRootContainer.Length));
+
+        return new ParentElementReaderContext(reader, subPath);
+    }
+}