add method to create a node from cache entry + mountpoint

lib/private/Files/Node/LazyRoot.php

@@ -22,7 +22,10 @@
  */
 namespace OC\Files\Node;
 
+use OCP\Files\Cache\ICacheEntry;
 use OCP\Files\IRootFolder;
+use OCP\Files\Mount\IMountPoint;
+use OCP\Files\Node as INode;
 
 /**
  * Class LazyRoot
@@ -52,4 +55,8 @@ public function getUserFolder($userId) {
 	public function getByIdInPath(int $id, string $path) {
 		return $this->__call(__FUNCTION__, func_get_args());
 	}
+
+	public function getNodeFromCacheEntryAndMount(ICacheEntry $cacheEntry, IMountPoint $mountPoint): INode {
+		return $this->getRootFolder()->getNodeFromCacheEntryAndMount($cacheEntry, $mountPoint);
+	}
 }

lib/private/Files/Node/Node.php

@@ -69,7 +69,7 @@ class Node implements INode {
 	 * @param string $path
 	 * @param FileInfo $fileInfo
 	 */
-	public function __construct(IRootFolder $root, $view, $path, $fileInfo = null, ?Node $parent = null, bool $infoHasSubMountsIncluded = true) {
+	public function __construct(IRootFolder $root, $view, $path, $fileInfo = null, ?INode $parent = null, bool $infoHasSubMountsIncluded = true) {
 		if (Filesystem::normalizePath($view->getRoot()) !== '/') {
 			throw new PreConditionNotMetException('The view passed to the node should not have any fake root set');
 		}

lib/private/Files/Node/Root.php

@@ -41,6 +41,7 @@
 use OC\Hooks\PublicEmitter;
 use OC\User\NoUserException;
 use OCP\EventDispatcher\IEventDispatcher;
+use OCP\Files\Cache\ICacheEntry;
 use OCP\Files\Config\IUserMountCache;
 use OCP\Files\Events\Node\FilesystemTornDownEvent;
 use OCP\Files\IRootFolder;
@@ -487,4 +488,29 @@ public function getByIdInPath(int $id, string $path): array {
 		});
 		return $folders;
 	}
+
+	public function getNodeFromCacheEntryAndMount(ICacheEntry $cacheEntry, IMountPoint $mountPoint): INode {
+		$path = $cacheEntry->getPath();
+		$fullPath = $mountPoint->getMountPoint() . $path;
+		// todo: LazyNode?
+		$info = new FileInfo($fullPath, $mountPoint->getStorage(), $path, $cacheEntry, $mountPoint);
+		$parentPath = dirname($fullPath);
+		$parent = new LazyFolder($this, function () use ($parentPath) {
+			$parent = $this->get($parentPath);
+			if ($parent instanceof \OCP\Files\Folder) {
+				return $parent;
+			} else {
+				throw new \Exception("parent $parentPath is not a folder");
+			}
+		}, [
+			'path' => $parentPath,
+		]);
+		$isDir = $info->getType() === FileInfo::TYPE_FOLDER;
+		$view = new View('');
+		if ($isDir) {
+			return new Folder($this, $view, $path, $info, $parent);
+		} else {
+			return new File($this, $view, $path, $info, $parent);
+		}
+	}
 }

lib/public/Files/IRootFolder.php

@@ -26,7 +26,9 @@
 
 use OC\Hooks\Emitter;
 use OC\User\NoUserException;
+use OCP\Files\Cache\ICacheEntry;
 use OCP\Files\Mount\IMountPoint;
+use OCP\Files\Node as INode;
 
 /**
  * Interface IRootFolder
@@ -64,6 +66,16 @@ public function getByIdInPath(int $id, string $path);
 	 */
 	public function getMountsIn(string $mountPoint): array;
 
+	/**
+	 * Create a `Node` for a file or folder from the cache entry and mountpoint
+	 *
+	 * @param ICacheEntry $cacheEntry
+	 * @param IMountPoint $mountPoint
+	 * @return Node
+	 * @since 28.0.0
+	 */
+	public function getNodeFromCacheEntryAndMount(ICacheEntry $cacheEntry, IMountPoint $mountPoint): INode;
+
 	/**
 	 * @since 28.0.0
 	 */