fix: rework UploadFolder implementation

apps/dav/lib/RootCollection.php

@@ -157,7 +157,10 @@ public function __construct() {
 		$uploadCollection = new Upload\RootCollection(
 			$userPrincipalBackend,
 			'principals/users',
-			Server::get(CleanupService::class));
+			Server::get(CleanupService::class),
+			$rootFolder,
+			$userSession,
+		);
 		$uploadCollection->disableListing = $disableListing;
 
 		$avatarCollection = new Avatars\RootCollection($userPrincipalBackend, 'principals/users');

apps/dav/lib/Upload/RootCollection.php

@@ -9,6 +9,8 @@
  */
 namespace OCA\DAV\Upload;
 
+use OCP\Files\IRootFolder;
+use OCP\IUserSession;
 use Sabre\DAVACL\AbstractPrincipalCollection;
 use Sabre\DAVACL\PrincipalBackend;
 
@@ -18,6 +20,8 @@ public function __construct(
 		PrincipalBackend\BackendInterface $principalBackend,
 		string $principalPrefix,
 		private CleanupService $cleanupService,
+		private IRootFolder $rootFolder,
+		private IUserSession $userSession,
 	) {
 		parent::__construct($principalBackend, $principalPrefix);
 	}
@@ -26,7 +30,7 @@ public function __construct(
 	 * @inheritdoc
 	 */
 	public function getChildForPrincipal(array $principalInfo): UploadHome {
-		return new UploadHome($principalInfo, $this->cleanupService);
+		return new UploadHome($principalInfo, $this->cleanupService, $this->rootFolder, $this->userSession);
 	}
 
 	/**

apps/dav/lib/Upload/UploadHome.php

@@ -7,18 +7,23 @@
  */
 namespace OCA\DAV\Upload;
 
-use OC\Files\Filesystem;
 use OC\Files\View;
 use OCA\DAV\Connector\Sabre\Directory;
+use OCP\Files\Folder;
+use OCP\Files\IRootFolder;
+use OCP\Files\NotFoundException;
 use OCP\IUserSession;
-use OCP\Server;
 use Sabre\DAV\Exception\Forbidden;
 use Sabre\DAV\ICollection;
 
 class UploadHome implements ICollection {
+	private ?Folder $uploadFolder = null;
+
 	public function __construct(
-		private array $principalInfo,
-		private CleanupService $cleanupService,
+		private readonly array $principalInfo,
+		private readonly CleanupService $cleanupService,
+		private readonly IRootFolder $rootFolder,
+		private readonly IUserSession $userSession,
 	) {
 	}
 
@@ -64,28 +69,33 @@ public function getLastModified() {
 		return $this->impl()->getLastModified();
 	}
 
-	/**
-	 * @return Directory
-	 */
-	private function impl() {
-		$view = $this->getView();
-		$rootInfo = $view->getFileInfo('');
-		return new Directory($view, $rootInfo);
+	private function getUploadFolder(): Folder {
+		if ($this->uploadFolder === null) {
+			$user = $this->userSession->getUser();
+			if (!$user) {
+				throw new Forbidden('Not logged in');
+			}
+			$path = '/' . $user->getUID() . '/uploads';
+			try {
+				$folder = $this->rootFolder->get($path);
+				if (!$folder instanceof Folder) {
+					throw new \Exception('Upload folder is a file');
+				}
+				$this->uploadFolder = $folder;
+			} catch (NotFoundException $e) {
+				$this->uploadFolder = $this->rootFolder->newFolder($path);
+			}
+		}
+		return $this->uploadFolder;
 	}
 
-	private function getView() {
-		$rootView = new View();
-		$user = Server::get(IUserSession::class)->getUser();
-		Filesystem::initMountPoints($user->getUID());
-		if (!$rootView->file_exists('/' . $user->getUID() . '/uploads')) {
-			$rootView->mkdir('/' . $user->getUID() . '/uploads');
-		}
-		return new View('/' . $user->getUID() . '/uploads');
+	private function impl(): Directory {
+		$folder = $this->getUploadFolder();
+		$view = new View($folder->getPath());
+		return new Directory($view, $folder);
 	}
 
 	private function getStorage() {
-		$view = $this->getView();
-		$storage = $view->getFileInfo('')->getStorage();
-		return $storage;
+		return $this->getUploadFolder()->getStorage();
 	}
 }