perf: switch places that always use the first getById result to getFirstNodeById

Signed-off-by: Robin Appelman <robin@icewind.nl>

apps/dav/lib/BulkUpload/BulkUploadPlugin.php

 
 				$node = $this->userFolder->newFile($headers['x-file-path'], $content);
 				$node->touch($mtime);
-				$node = $this->userFolder->getById($node->getId())[0];
+				$node = $this->userFolder->getFirstNodeById($node->getId());
 
 				$writtenFiles[$headers['x-file-path']] = [
 					"error" => false,

apps/dav/lib/Connector/Sabre/FilesReportPlugin.php

 		}
 		$folder = $this->userFolder;
 		if (trim($rootNode->getPath(), '/') !== '') {
+			/** @var Folder $folder */
 			$folder = $folder->get($rootNode->getPath());
 		}
 
 		$results = [];
 		foreach ($fileIds as $fileId) {
-			$entry = $folder->getById($fileId);
+			$entry = $folder->getFirstNodeById($fileId);
 			if ($entry) {
-				$entry = current($entry);
 				$results[] = $this->wrapNode($entry);
 			}
 		}
 		return $results;
 	}
 
-	protected function wrapNode(\OCP\Files\File|\OCP\Files\Folder $node): File|Directory {
+	protected function wrapNode(\OCP\Files\Node $node): File|Directory {
 		if ($node instanceof \OCP\Files\File) {
 			return new File($this->fileView, $node);
 		} else {

apps/dav/lib/Controller/DirectController.php

 	public function getUrl(int $fileId, int $expirationTime = 60 * 60 * 8): DataResponse {
 		$userFolder = $this->rootFolder->getUserFolder($this->userId);
 
-		$files = $userFolder->getById($fileId);
+		$file = $userFolder->getFirstNodeById($fileId);
 
-		if ($files === []) {
+		if (!$file) {
 			throw new OCSNotFoundException();
 		}
 
 			throw new OCSBadRequestException('Expiration time should be greater than 0 and less than or equal to ' . (60 * 60 * 24));
 		}
 
-		$file = array_shift($files);
 		if (!($file instanceof File)) {
 			throw new OCSBadRequestException('Direct download only works for files');
 		}

apps/dav/lib/Direct/DirectFile.php

 	private function getFile() {
 		if ($this->file === null) {
 			$userFolder = $this->rootFolder->getUserFolder($this->direct->getUserId());
-			$files = $userFolder->getById($this->direct->getFileId());
+			$file = $userFolder->getFirstNodeById($this->direct->getFileId());
 
-			if ($files === []) {
+			if (!$file) {
 				throw new NotFound();
 			}
+			if (!$file instanceof File) {
+				throw new Forbidden("direct download not allowed on directories");
+			}
 
-			$this->file = array_shift($files);
+			$this->file = $file;
 		}
 
 		return $this->file;

apps/dav/lib/RootCollection.php

 			\OC::$server->getSystemTagObjectMapper(),
 			\OC::$server->getUserSession(),
 			$groupManager,
-			$dispatcher
+			$dispatcher,
+			$rootFolder,
 		);
 		$systemTagInUseCollection = \OCP\Server::get(SystemTag\SystemTagsInUseCollection::class);
 		$commentsCollection = new Comments\RootCollection(

apps/dav/lib/SystemTag/SystemTagsRelationsCollection.php

 namespace OCA\DAV\SystemTag;
 
 use OCP\EventDispatcher\IEventDispatcher;
+use OCP\Files\IRootFolder;
 use OCP\IGroupManager;
 use OCP\IUserSession;
 use OCP\SystemTag\ISystemTagManager;
 		IUserSession $userSession,
 		IGroupManager $groupManager,
 		IEventDispatcher $dispatcher,
+		IRootFolder $rootFolder,
 	) {
 		$children = [
 			new SystemTagsObjectTypeCollection(
 				$tagMapper,
 				$userSession,
 				$groupManager,
-				function ($name) {
-					$nodes = \OC::$server->getUserFolder()->getById((int)$name);
-					return !empty($nodes);
+				function (string $name) use ($rootFolder, $userSession): bool {
+					$user = $userSession->getUser();
+					if ($user) {
+						$node = $rootFolder->getUserFolder($user->getUID())->getFirstNodeById((int)$name);
+						return $node !== null;
+					} else {
+						return false;
+					}
 				}
 			),
 		];

apps/dav/tests/unit/Connector/Sabre/FilesReportPluginTest.php

 			->willReturn('/');
 
 		$this->userFolder->expects($this->exactly(2))
-			->method('getById')
+			->method('getFirstNodeById')
 			->withConsecutive(
 				['111'],
 				['222'],
 			)
 			->willReturnOnConsecutiveCalls(
-				[$filesNode1],
-				[$filesNode2],
+				$filesNode1,
+				$filesNode2,
 			);
 
 		/** @var \OCA\DAV\Connector\Sabre\Directory|MockObject $reportTargetNode */
 			->willReturn($subNode);
 
 		$subNode->expects($this->exactly(2))
-			->method('getById')
+			->method('getFirstNodeById')
 			->withConsecutive(
 				['111'],
 				['222'],
 			)
 			->willReturnOnConsecutiveCalls(
-				[$filesNode1],
-				[$filesNode2],
+				$filesNode1,
+				$filesNode2,
 			);
 
 		/** @var \OCA\DAV\Connector\Sabre\Directory|MockObject $reportTargetNode */

apps/dav/tests/unit/Controller/DirectControllerTest.php

 
 		$folder = $this->createMock(Folder::class);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(101)
-			->willReturn([$folder]);
+			->willReturn($folder);
 
 		$this->expectException(OCSBadRequestException::class);
 		$this->controller->getUrl(101);
 		$this->timeFactory->method('getTime')
 			->willReturn(42);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(101)
-			->willReturn([$file]);
+			->willReturn($file);
 
 		$userFolder->method('getRelativePath')
 			->willReturn('/path');

apps/dav/tests/unit/Direct/DirectFileTest.php

 			->willReturn($this->userFolder);
 
 		$this->file = $this->createMock(File::class);
-		$this->userFolder->method('getById')
+		$this->userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$this->file]);
+			->willReturn($this->file);
 
 		$this->eventDispatcher = $this->createMock(IEventDispatcher::class);
 

apps/dav/tests/unit/SystemTag/SystemTagsObjectTypeCollectionTest.php

 		$userFolder = $this->userFolder;
 
 		$closure = function ($name) use ($userFolder) {
-			$nodes = $userFolder->getById(intval($name));
-			return !empty($nodes);
+			$node = $userFolder->getFirstNodeById(intval($name));
+			return $node !== null;
 		};
 
 		$this->node = new \OCA\DAV\SystemTag\SystemTagsObjectTypeCollection(
 		);
 	}
 
-	
+
 	public function testForbiddenCreateFile(): void {
 		$this->expectException(\Sabre\DAV\Exception\Forbidden::class);
 
 		$this->node->createFile('555');
 	}
 
-	
+
 	public function testForbiddenCreateDirectory(): void {
 		$this->expectException(\Sabre\DAV\Exception\Forbidden::class);
 
 
 	public function testGetChild(): void {
 		$this->userFolder->expects($this->once())
-			->method('getById')
+			->method('getFirstNodeById')
 			->with('555')
-			->willReturn([true]);
+			->willReturn($this->createMock(\OCP\Files\Node::class));
 		$childNode = $this->node->getChild('555');
 
 		$this->assertInstanceOf('\OCA\DAV\SystemTag\SystemTagsObjectMappingCollection', $childNode);
 		$this->assertEquals('555', $childNode->getName());
 	}
 
-	
+
 	public function testGetChildWithoutAccess(): void {
 		$this->expectException(\Sabre\DAV\Exception\NotFound::class);
 
 		$this->userFolder->expects($this->once())
-			->method('getById')
+			->method('getFirstNodeById')
 			->with('555')
-			->willReturn([]);
+			->willReturn(null);
 		$this->node->getChild('555');
 	}
 
-	
+
 	public function testGetChildren(): void {
 		$this->expectException(\Sabre\DAV\Exception\MethodNotAllowed::class);
 
 
 	public function testChildExists(): void {
 		$this->userFolder->expects($this->once())
-			->method('getById')
+			->method('getFirstNodeById')
 			->with('123')
-			->willReturn([true]);
+			->willReturn($this->createMock(\OCP\Files\Node::class));
 		$this->assertTrue($this->node->childExists('123'));
 	}
 
 	public function testChildExistsWithoutAccess(): void {
 		$this->userFolder->expects($this->once())
-			->method('getById')
+			->method('getFirstNodeById')
 			->with('555')
-			->willReturn([]);
+			->willReturn(null);
 		$this->assertFalse($this->node->childExists('555'));
 	}
 
-	
+
 	public function testDelete(): void {
 		$this->expectException(\Sabre\DAV\Exception\Forbidden::class);
 
 		$this->node->delete();
 	}
 
-	
+
 	public function testSetName(): void {
 		$this->expectException(\Sabre\DAV\Exception\Forbidden::class);
 

apps/federatedfilesharing/lib/FederatedShareProvider.php

 	 *
 	 * @param string $userId
 	 * @param int $id
-	 * @return \OCP\Files\File|\OCP\Files\Folder
+	 * @return \OCP\Files\Node
 	 * @throws InvalidShare
 	 */
 	private function getNode($userId, $id) {
 			throw new InvalidShare();
 		}
 
-		$nodes = $userFolder->getById($id);
+		$node = $userFolder->getFirstNodeById($id);
 
-		if (empty($nodes)) {
+		if (!$node) {
 			throw new InvalidShare();
 		}
 
-		return $nodes[0];
+		return $node;
 	}
 
 	/**

apps/files/lib/Activity/Helper.php

 		$userFolder = $this->rootFolder->getUserFolder($user);
 		$favoriteNodes = [];
 		foreach ($favorites as $favorite) {
-			$nodes = $userFolder->getById($favorite);
-			if (!empty($nodes)) {
-				$node = array_shift($nodes);
+			$node = $userFolder->getFirstNodeById($favorite);
+			if ($node) {
 				if (!$foldersOnly || $node instanceof Folder) {
 					$favoriteNodes[] = $node;
 				}

apps/files/lib/Activity/Provider.php

 		}
 
 		$userFolder = $this->rootFolder->getUserFolder($this->activityManager->getCurrentUserId());
-		$files = $userFolder->getById($fileId);
-		if (empty($files)) {
+		$file = $userFolder->getFirstNodeById($fileId);
+		if (!$file) {
 			try {
 				// Deleted, try with parent
 				$file = $this->findExistingParent($userFolder, dirname($path));
 			return $file;
 		}
 
-		$file = array_shift($files);
-
 		if ($file instanceof Folder && $file->isEncrypted()) {
 			// If the folder is encrypted, it is the Container,
 			// but can be the name is just fine.

apps/files/lib/BackgroundJob/TransferOwnership.php

 		$fileId = $transfer->getFileId();
 
 		$userFolder = $this->rootFolder->getUserFolder($sourceUser);
-		$nodes = $userFolder->getById($fileId);
+		$node = $userFolder->getFirstNodeById($fileId);
 
-		if (empty($nodes)) {
+		if (!$node) {
 			$this->logger->alert('Could not transfer ownership: Node not found');
 			$this->failedNotication($transfer);
 			return;
 		}
-		$path = $userFolder->getRelativePath($nodes[0]->getPath());
+		$path = $userFolder->getRelativePath($node->getPath());
 
 		$sourceUserObject = $this->userManager->get($sourceUser);
 		$destinationUserObject = $this->userManager->get($destinationUser);

apps/files/lib/Collaboration/Resources/ResourceProvider.php

 		if (isset($this->nodes[(int) $resource->getId()])) {
 			return $this->nodes[(int) $resource->getId()];
 		}
-		$nodes = $this->rootFolder->getById((int) $resource->getId());
-		if (!empty($nodes)) {
-			$this->nodes[(int) $resource->getId()] = array_shift($nodes);
+		$node = $this->rootFolder->getFirstNodeById((int) $resource->getId());
+		if ($node) {
+			$this->nodes[(int) $resource->getId()] = $node;
 			return $this->nodes[(int) $resource->getId()];
 		}
 		return null;
 		}
 
 		$userFolder = $this->rootFolder->getUserFolder($user->getUID());
-		$nodes = $userFolder->getById((int) $resource->getId());
+		$node = $userFolder->getById((int) $resource->getId());
 
-		if (!empty($nodes)) {
-			$this->nodes[(int) $resource->getId()] = array_shift($nodes);
+		if ($node) {
+			$this->nodes[(int) $resource->getId()] = $node;
 			return true;
 		}
 

apps/files/lib/Controller/ViewController.php

 
 		$uid = $user->getUID();
 		$userFolder = $this->rootFolder->getUserFolder($uid);
-		$nodes = $userFolder->getById((int) $fileid);
-		$node = array_shift($nodes);
+		$node = $userFolder->getFirstNodeById((int) $fileid);
 
 		if ($node === null) {
 			return;
 	private function redirectToFileIfInTrashbin($fileId): RedirectResponse {
 		$uid = $this->userSession->getUser()->getUID();
 		$baseFolder = $this->rootFolder->getUserFolder($uid);
-		$nodes = $baseFolder->getById($fileId);
+		$node = $baseFolder->getFirstNodeById($fileId);
 		$params = [];
 
-		if (empty($nodes) && $this->appManager->isEnabledForUser('files_trashbin')) {
+		if (!$node && $this->appManager->isEnabledForUser('files_trashbin')) {
 			/** @var Folder */
 			$baseFolder = $this->rootFolder->get($uid . '/files_trashbin/files/');
-			$nodes = $baseFolder->getById($fileId);
+			$node = $baseFolder->getFirstNodeById($fileId);
 			$params['view'] = 'trashbin';
 
-			if (!empty($nodes)) {
-				$node = current($nodes);
+			if ($node) {
 				$params['fileid'] = $fileId;
 				if ($node instanceof Folder) {
 					// set the full path to enter the folder
 	private function redirectToFile(int $fileId) {
 		$uid = $this->userSession->getUser()->getUID();
 		$baseFolder = $this->rootFolder->getUserFolder($uid);
-		$nodes = $baseFolder->getById($fileId);
+		$node = $baseFolder->getFirstNodeById($fileId);
 		$params = ['view' => 'files'];
 
 		try {
 		} catch (NotFoundException $e) {
 		}
 
-		if (!empty($nodes)) {
-			$node = current($nodes);
+		if ($node) {
 			$params['fileid'] = $fileId;
 			if ($node instanceof Folder) {
 				// set the full path to enter the folder

apps/files/lib/Listener/SyncLivePhotosListener.php

 		$peerFileId = (int)$metadata->getString('files-live-photo');
 
 		// Check the user's folder.
-		$nodes = $this->userFolder->getById($peerFileId);
-		if (count($nodes) !== 0) {
-			return $nodes[0];
+		$node = $this->userFolder->getFirstNodeById($peerFileId);
+		if ($node) {
+			return $node;
 		}
 
 		// Check the user's trashbin.

apps/files/tests/Controller/ViewControllerTest.php

 				[$this->user->getUID(), 'files', 'crop_image_previews', true, true],
 				[$this->user->getUID(), 'files', 'show_grid', true],
 			]);
-		
+
 		$baseFolderFiles = $this->getMockBuilder(Folder::class)->getMock();
 
 		$this->rootFolder->expects($this->any())
 			->willReturn($baseFolderTrash);
 
 		$baseFolderFiles->expects($this->any())
-			->method('getById')
+			->method('getFirstNodeById')
 			->with(123)
-			->willReturn([]);
+			->willReturn(null);
 
 		$node = $this->getMockBuilder(File::class)->getMock();
 		$node->expects($this->once())
 			->willReturn($parentNode);
 
 		$baseFolderTrash->expects($this->once())
-			->method('getById')
+			->method('getFirstNodeById')
 			->with(123)
-			->willReturn([$node]);
+			->willReturn($node);
 		$baseFolderTrash->expects($this->once())
 			->method('getRelativePath')
 			->with('testuser1/files_trashbin/files/test.d1462861890/sub')

apps/files_reminders/lib/Model/RichReminder.php

 	 * @throws NodeNotFoundException
 	 */
 	public function getNode(): Node {
-		$nodes = $this->root->getUserFolder($this->getUserId())->getById($this->getFileId());
-		if (empty($nodes)) {
+		$node = $this->root->getUserFolder($this->getUserId())->getFirstNodeById($this->getFileId());
+		if (!$node) {
 			throw new NodeNotFoundException();
 		}
-		$node = reset($nodes);
 		return $node;
 	}
 

apps/files_reminders/lib/Notification/Notifier.php

 				$params = $notification->getSubjectParameters();
 				$fileId = $params['fileId'];
 
-				$nodes = $this->root->getUserFolder($notification->getUser())->getById($fileId);
-				if (empty($nodes)) {
+				$node = $this->root->getUserFolder($notification->getUser())->getFirstNodeById($fileId);
+				if (!$node) {
 					throw new InvalidArgumentException();
 				}
-				$node = reset($nodes);
 
 				$path = rtrim($node->getPath(), '/');
 				if (strpos($path, '/' . $notification->getUser() . '/files/') === 0) {

apps/files_reminders/lib/Service/ReminderService.php

 			$this->reminderMapper->update($reminder);
 			return false;
 		} catch (DoesNotExistException $e) {
-			$nodes = $this->root->getUserFolder($user->getUID())->getById($fileId);
-			if (empty($nodes)) {
+			$node = $this->root->getUserFolder($user->getUID())->getFirstNodeById($fileId);
+			if (!$node) {
 				throw new NodeNotFoundException();
 			}
 			// Create new reminder if no reminder is found

apps/files_sharing/lib/Collaboration/ShareRecipientSorter.php

 		}
 		$userFolder = $this->rootFolder->getUserFolder($user->getUID());
 		/** @var Node[] $nodes */
-		$nodes = $userFolder->getById((int)$context['itemId']);
-		if (count($nodes) === 0) {
+		$node = $userFolder->getFirstNodeById((int)$context['itemId']);
+		if (!$node) {
 			return;
 		}
-		$al = $this->shareManager->getAccessList($nodes[0]);
+		$al = $this->shareManager->getAccessList($node);
 
 		foreach ($sortArray as $type => &$byType) {
 			if (!isset($al[$type]) || !is_array($al[$type])) {

apps/files_sharing/lib/Controller/DeletedShareAPIController.php

 			'path' => $share->getTarget(),
 		];
 		$userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
-		$nodes = $userFolder->getById($share->getNodeId());
-		if (empty($nodes)) {
+		$node = $userFolder->getFirstNodeById($share->getNodeId());
+		if (!$node) {
 			// fallback to guessing the path
 			$node = $userFolder->get($share->getTarget());
 			if ($node === null || $share->getTarget() === '') {
 				throw new NotFoundException();
 			}
-		} else {
-			$node = $nodes[0];
 		}
 
 		$result['path'] = $userFolder->getRelativePath($node->getPath());

apps/files_sharing/lib/Controller/ShareAPIController.php

 		if ($recipientNode) {
 			$node = $recipientNode;
 		} else {
-			$nodes = $userFolder->getById($share->getNodeId());
-			if (empty($nodes)) {
+			$node = $userFolder->getFirstNodeById($share->getNodeId());
+			if (!$node) {
 				// fallback to guessing the path
 				$node = $userFolder->get($share->getTarget());
 				if ($node === null || $share->getTarget() === '') {
 					throw new NotFoundException();
 				}
-			} else {
-				$node = reset($nodes);
 			}
 		}
 
 			$owner = $node->getOwner()
 						  ->getUID();
 			$userFolder = $this->rootFolder->getUserFolder($owner);
-			$nodes = $userFolder->getById($node->getId());
-			$node = array_shift($nodes);
+			$node = $userFolder->getFirstNodeById($node->getId());
 		}
 		$basePath = $userFolder->getPath();
 
 		foreach ($nodes as $node) {
 			$getShares = $this->getFormattedShares($owner, $node, false, true);
 
-			$currentUserNodes = $currentUserFolder->getById($node->getId());
-			if (!empty($currentUserNodes)) {
-				$parent = array_pop($currentUserNodes);
+			$currentUserNode = $currentUserFolder->getFirstNodeById($node->getId());
+			if ($currentUserNode) {
+				$parent = $currentUserNode;
 			}
 
 			$subPath = $currentUserFolder->getRelativePath($parent->getPath());
 
 		$result = array_filter(array_map(function (IShare $share) {
 			$userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
-			$nodes = $userFolder->getById($share->getNodeId());
-			if (empty($nodes)) {
+			$node = $userFolder->getFirstNodeById($share->getNodeId());
+			if (!$node) {
 				// fallback to guessing the path
 				$node = $userFolder->get($share->getTarget());
 				if ($node === null || $share->getTarget() === '') {
 					return null;
 				}
-			} else {
-				$node = $nodes[0];
 			}
 
 			try {
 		// Have reshare rights on the shared file/folder ?
 		// Does the currentUser have access to the shared file?
 		$userFolder = $this->rootFolder->getUserFolder($this->currentUser);
-		$files = $userFolder->getById($share->getNodeId());
-		if (!empty($files) && $this->shareProviderResharingRights($this->currentUser, $share, $files[0])) {
+		$file = $userFolder->getFirstNodeById($share->getNodeId());
+		if ($file && $this->shareProviderResharingRights($this->currentUser, $share, $file)) {
 			return true;
 		}
 
 			return; // Probably in a test
 		}
 		$userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
-		$nodes = $userFolder->getById($share->getNodeId());
-		if (empty($nodes)) {
+		$node = $userFolder->getFirstNodeById($share->getNodeId());
+		if (!$node) {
 			return;
 		}
-		$node = $nodes[0];
 		if ($node->getStorage()->instanceOfStorage(SharedStorage::class)) {
 			$storage = $node->getStorage();
 			if ($storage instanceof Wrapper) {

apps/files_sharing/lib/Controller/ShareController.php

 		$fileId = $node->getId();
 
 		$userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
-		$userNodeList = $userFolder->getById($fileId);
-		$userNode = $userNodeList[0];
+		$userNode = $userFolder->getFirstNodeById($fileId);
 		$ownerFolder = $this->rootFolder->getUserFolder($share->getShareOwner());
 		$userPath = $userFolder->getRelativePath($userNode->getPath());
 		$ownerPath = $ownerFolder->getRelativePath($node->getPath());

apps/files_sharing/lib/OrphanHelper.php

 		} catch (NoUserException $e) {
 			return false;
 		}
-		$nodes = $userFolder->getById($fileId);
-		return count($nodes) > 0;
+		$node = $userFolder->getFirstNodeById($fileId);
+		return $node !== null;
 	}
 
 	/**

apps/files_sharing/lib/SharedStorage.php

 			$rootFolder = \OC::$server->get(IRootFolder::class);
 			$this->ownerUserFolder = $rootFolder->getUserFolder($this->superShare->getShareOwner());
 			$sourceId = $this->superShare->getNodeId();
-			$ownerNodes = $this->ownerUserFolder->getById($sourceId);
-			/** @var Node|false $ownerNode */
-			$ownerNode = current($ownerNodes);
+			$ownerNode = $this->ownerUserFolder->getFirstNodeById($sourceId);
 			if (!$ownerNode) {
 				$this->storage = new FailedStorage(['exception' => new NotFoundException("File by id $sourceId not found")]);
 				$this->cache = new FailedCache();

apps/files_sharing/tests/Collaboration/ShareRecipientSorterTest.php

 
 		if ($data['context']['itemType'] === 'files') {
 			$folder->expects($this->once())
-				->method('getById')
+				->method('getFirstNodeById')
 				->with($data['context']['itemId'])
-				->willReturn([$node]);
+				->willReturn($node);
 
 			$this->shareManager->expects($this->once())
 				->method('getAccessList')
 				->willReturn($data['accessList']);
 		} else {
 			$folder->expects($this->never())
-				->method('getById');
+				->method('getFirstNodeById');
 			$this->shareManager->expects($this->never())
 				->method('getAccessList');
 		}
 			->willReturn($folder);
 
 		$folder->expects($this->once())
-			->method('getById')
-			->willReturn([]);
+			->method('getFirstNodeById')
+			->willReturn(null);
 
 		$user = $this->createMock(IUser::class);
 		$user->expects($this->any())

apps/files_sharing/tests/Controller/ShareAPIControllerTest.php

 	 */
 	public function testDeleteShareFileOwner() {
 		$node = $this->getMockBuilder(File::class)->getMock();
+		$node->method('getId')->willReturn(1);
 
 		$share = $this->newShare();
 		$share->setShareOwner($this->currentUser)
 	 */
 	public function testDeleteSharedWithMyGroup() {
 		$node = $this->getMockBuilder(File::class)->getMock();
+		$node->method('getId')->willReturn(1);
 
 		$share = $this->newShare();
 		$share->setShareType(IShare::TYPE_GROUP)
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
-			->willReturn([$share->getNode()]);
+			->willReturn($share->getNode());
 
 		$this->shareManager->expects($this->once())
 			->method('deleteFromSelf')
 		$this->expectExceptionMessage('Wrong share ID, share does not exist');
 
 		$node = $this->getMockBuilder(File::class)->getMock();
+		$node->method('getId')->willReturn(42);
 
 		$share = $this->newShare();
 		$share->setShareType(IShare::TYPE_GROUP)
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
-			->willReturn([$share->getNode()]);
+			->willReturn($share->getNode());
 
 		$this->shareManager->expects($this->never())
 			->method('deleteFromSelf');
 			->with($share->getNodeId())
 			->willReturn([$share->getNode()]);
 
+		$userFolder->method('getFirstNodeById')
+			->with($share->getNodeId())
+			->willReturn($share->getNode());
+
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
-			->willReturn([$file]);
+			->willReturn($file);
 
 		$file->method('getPermissions')
 			->will($this->onConsecutiveCalls(\OCP\Constants::PERMISSION_SHARE, \OCP\Constants::PERMISSION_READ));
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
-			->willReturn([$share->getNode()]);
+			->willReturn($share->getNode());
 
 		if (!$helperAvailable) {
 			$this->appManager->method('isEnabledForUser')
 			]);
 
 		$path = $this->getMockBuilder(Folder::class)->getMock();
+		$path->method('getId')->willReturn(42);
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 		$this->expectExceptionMessage('Public upload disabled by the administrator');
 
 		$path = $this->getMockBuilder(Folder::class)->getMock();
+		$path->method('getId')->willReturn(42);
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 		$this->expectExceptionMessage('Public upload is only possible for publicly shared folders');
 
 		$path = $this->getMockBuilder(File::class)->getMock();
+		$path->method('getId')->willReturn(42);
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 		$ocs = $this->mockFormatShare();
 
 		$path = $this->getMockBuilder(Folder::class)->getMock();
+		$path->method('getId')->willReturn(1);
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 		$ocs = $this->mockFormatShare();
 
 		$path = $this->getMockBuilder(Folder::class)->getMock();
+		$path->method('getId')->willReturn(42);
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 		$ocs = $this->mockFormatShare();
 
 		$path = $this->getMockBuilder(Folder::class)->getMock();
+		$path->method('getId')->willReturn(42);
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 		$ocs = $this->mockFormatShare();
 
 		$path = $this->getMockBuilder(Folder::class)->getMock();
+		$path->method('getId')->willReturn(42);
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 			]);
 
 		$path = $this->getMockBuilder(Folder::class)->getMock();
+		$path->method('getId')->willReturn(42);
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 		$ocs = $this->mockFormatShare();
 
 		$path = $this->getMockBuilder(Folder::class)->getMock();
+		$path->method('getId')->willReturn(42);
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 			->willReturn($userFolder);
 
 		$path = $this->getMockBuilder(Folder::class)->getMock();
+		$path->method('getId')->willReturn(42);
+
 		$storage = $this->createMock(Storage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
-			->willReturn([$share->getNode()]);
+			->willReturn($share->getNode());
 
 		$this->ocs->updateShare(42);
 	}
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$node]);
+			->willReturn($node);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$node->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$folder->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$folder->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$folder->method('getMountPoint')
 
 		$ocs = $this->mockFormatShare();
 		[$userFolder, $folder] = $this->getNonSharedUserFolder();
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
 		$ocs = $this->mockFormatShare();
 		[$userFolder, $folder] = $this->getNonSharedUserFolder();
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 		$file->method('getId')
 			->willReturn(42);
 		[$userFolder, $folder] = $this->getNonSharedUserFolder();
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
 		[$userFolder, $node] = $this->getNonSharedUserFolder();
 		$node->method('getId')->willReturn(42);
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$node]);
+			->willReturn($node);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 		$date->setTime(0, 0, 0);
 
 		[$userFolder, $node] = $this->getNonSharedUserFolder();
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$node]);
+			->willReturn($node);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 		$date->setTime(0, 0, 0);
 
 		[$userFolder, $node] = $this->getNonSharedUserFolder();
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$node]);
+			->willReturn($node);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 		$date->setTime(0, 0, 0);
 
 		[$userFolder, $node] = $this->getNonSharedUserFolder();
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$node]);
+			->willReturn($node);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$node]);
+			->willReturn($node);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$node->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$node]);
+			->willReturn($node);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$node->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$folder->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$folder->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$folder->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$file]);
+			->willReturn($file);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$file->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$folder->method('getMountPoint')
 			->with($this->currentUser)
 			->willReturn($userFolder);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(42)
-			->willReturn([$folder]);
+			->willReturn($folder);
 
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$folder->method('getMountPoint')
 		$this->dateTimeZone->method('getTimezone')->willReturn(new \DateTimeZone('UTC'));
 
 		if (!$exception) {
-			$this->rootFolder->method('getById')
+			$this->rootFolder->method('getFirstNodeById')
 				->with($share->getNodeId())
-				->willReturn([$share->getNode()]);
+				->willReturn($share->getNode());
 
 			$this->rootFolder->method('getRelativePath')
 				->with($share->getNode()->getPath())
 			->with($this->currentUser)
 			->willReturnSelf();
 
-		$this->rootFolder->method('getById')
+		$this->rootFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
-			->willReturn([$share->getNode()]);
+			->willReturn($share->getNode());
 
 		$this->rootFolder->method('getRelativePath')
 			->with($share->getNode()->getPath())
 			]);
 		$userFolder->method('getStorage')->willReturn($storage);
 		$node->method('getStorage')->willReturn($storage);
+		$node->method('getId')->willReturn(42);
 		return [$userFolder, $node];
 	}
 
 			]);
 		$userFolder->method('getStorage')->willReturn($storage);
 		$node->method('getStorage')->willReturn($storage);
+		$node->method('getId')->willReturn(42);
 		return [$userFolder, $node];
 	}
 }

apps/files_sharing/tests/Controller/ShareControllerTest.php

 use OCA\FederatedFileSharing\FederatedShareProvider;
 use OCA\Files_Sharing\Controller\ShareController;
 use OCA\Files_Sharing\DefaultPublicShareTemplateProvider;
+use OCA\Files_Sharing\Event\BeforeTemplateRenderedEvent;
 use OCP\Accounts\IAccount;
 use OCP\Accounts\IAccountManager;
 use OCP\Accounts\IAccountProperty;
 		$file->method('getSize')->willReturn(33);
 		$file->method('isReadable')->willReturn(true);
 		$file->method('isShareable')->willReturn(true);
+		$file->method('getId')->willReturn(111);
 
 		$accountName = $this->createMock(IAccountProperty::class);
 		$accountName->method('getScope')
 			return null;
 		});
 
-		$this->eventDispatcher->expects($this->exactly(2))
-			->method('dispatchTyped')
-			->with(
-				$this->callback(function ($event) use ($share) {
+		$this->eventDispatcher->method('dispatchTyped')->with(
+			$this->callback(function ($event) use ($share) {
+				if ($event instanceof BeforeTemplateRenderedEvent) {
 					return $event->getShare() === $share;
-				})
-			);
+				} else {
+					return true;
+				}
+			})
+		);
 
 		$this->l10n->expects($this->any())
 			->method('t')
 		$file->method('getSize')->willReturn(33);
 		$file->method('isReadable')->willReturn(true);
 		$file->method('isShareable')->willReturn(true);
+		$file->method('getId')->willReturn(111);
 
 		$accountName = $this->createMock(IAccountProperty::class);
 		$accountName->method('getScope')
 			return null;
 		});
 
-		$this->eventDispatcher->expects($this->exactly(2))
-			->method('dispatchTyped')
-			->with(
-				$this->callback(function ($event) use ($share) {
+		$this->eventDispatcher->method('dispatchTyped')->with(
+			$this->callback(function ($event) use ($share) {
+				if ($event instanceof BeforeTemplateRenderedEvent) {
 					return $event->getShare() === $share;
-				})
-			);
+				} else {
+					return true;
+				}
+			})
+		);
 
 		$this->l10n->expects($this->any())
 			->method('t')
 		$file->method('getSize')->willReturn(33);
 		$file->method('isReadable')->willReturn(true);
 		$file->method('isShareable')->willReturn(true);
+		$file->method('getId')->willReturn(111);
 
 		$accountName = $this->createMock(IAccountProperty::class);
 		$accountName->method('getScope')
 			return null;
 		});
 
-		$this->eventDispatcher->expects($this->exactly(2))
-			->method('dispatchTyped')
-			->with(
-				$this->callback(function ($event) use ($share) {
+		$this->eventDispatcher->method('dispatchTyped')->with(
+			$this->callback(function ($event) use ($share) {
+				if ($event instanceof BeforeTemplateRenderedEvent) {
 					return $event->getShare() === $share;
-				})
-			);
+				} else {
+					return true;
+				}
+			})
+		);
 
 		$this->l10n->expects($this->any())
 			->method('t')
 		$folder->method('getStorage')->willReturn($storage);
 		$folder->method('get')->with('')->willReturn($folder);
 		$folder->method('getSize')->willReturn(1337);
+		$folder->method('getId')->willReturn(111);
 
 		$accountName = $this->createMock(IAccountProperty::class);
 		$accountName->method('getScope')

apps/files_sharing/tests/SharedStorageTest.php

 	public function testInitWithNotFoundSource() {
 		$share = $this->createMock(IShare::class);
 		$share->method('getShareOwner')->willReturn(self::TEST_FILES_SHARING_API_USER1);
+		$share->method('getNodeId')->willReturn(1);
 		$ownerView = $this->createMock(View::class);
 		$ownerView->method('getPath')->will($this->throwException(new NotFoundException()));
 		$storage = new SharedStorage([

apps/files_trashbin/lib/Trash/LegacyTrashBackend.php

 use OCA\Files_Trashbin\Storage;
 use OCA\Files_Trashbin\Trashbin;
 use OCP\Files\FileInfo;
+use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
 use OCP\Files\NotFoundException;
 use OCP\Files\Storage\IStorage;
 		try {
 			$userFolder = $this->rootFolder->getUserFolder($user->getUID());
 			$trash = $userFolder->getParent()->get('files_trashbin/files');
-			$trashFiles = $trash->getById($fileId);
-			if (!$trashFiles) {
+			if ($trash instanceof Folder) {
+				return $trash->getFirstNodeById($fileId);
+			} else {
 				return null;
 			}
-			return $trashFiles ? array_pop($trashFiles) : null;
 		} catch (NotFoundException $e) {
 			return null;
 		}

apps/files_versions/lib/Sabre/VersionRoot.php

 		$userFolder = $this->rootFolder->getUserFolder($this->user->getUID());
 
 		$fileId = (int)$name;
-		$nodes = $userFolder->getById($fileId);
+		$node = $userFolder->getFirstNodeById($fileId);
 
-		if ($nodes === []) {
+		if (!$node) {
 			throw new NotFound();
 		}
 
-		$node = array_pop($nodes);
-
 		if (!$node instanceof File) {
 			throw new NotFound();
 		}

apps/files_versions/lib/Storage.php

 		$mount = $file->getMountPoint();
 		if ($mount instanceof SharedMount) {
 			$ownerFolder = $rootFolder->getUserFolder($mount->getShare()->getShareOwner());
-			$ownerNodes = $ownerFolder->getById($file->getId());
-			if (count($ownerNodes)) {
-				$file = current($ownerNodes);
+			$ownerNode = $ownerFolder->getFirstNodeById($file->getId());
+			if ($ownerNode) {
+				$file = $ownerNode;
 				$uid = $mount->getShare()->getShareOwner();
 			}
 		}

apps/files_versions/lib/Versions/LegacyVersionsBackend.php

 
 			$userFolder = $this->rootFolder->getUserFolder($user->getUID());
 
-			$nodes = $userFolder->getById($fileId);
-			$file = array_pop($nodes);
+			$file = $userFolder->getFirstNodeById($fileId);
 
 			if (!$file) {
 				throw new NotFoundException("version file not found for share owner");

core/Command/FilesMetadata/Get.php

 		}
 
 		if ($input->getOption('refresh')) {
-			$node = $this->rootFolder->getUserFolder($input->getArgument('userId'))->getById($fileId);
-			if (count($node) === 0) {
+			$node = $this->rootFolder->getUserFolder($input->getArgument('userId'))->getFirstNodeById($fileId);
+			if (!$node) {
 				throw new NotFoundException();
 			}
 			$metadata = $this->filesMetadataManager->refreshMetadata(
-				$node[0],
+				$node,
 				IFilesMetadataManager::PROCESS_LIVE | IFilesMetadataManager::PROCESS_BACKGROUND
 			);
 		} else {

core/Command/Info/FileUtils.php

 			}
 			$mount = $mounts[0];
 			$userFolder = $this->rootFolder->getUserFolder($mount->getUser()->getUID());
-			$nodes = $userFolder->getById((int)$fileInput);
-			if (!$nodes) {
-				return null;
-			}
-			return $nodes[0];
+			return $userFolder->getFirstNodeById((int)$fileInput);
 		} else {
 			try {
 				return $this->rootFolder->get($fileInput);

core/Command/Preview/Generate.php

 			}
 			$mount = $mounts[0];
 			$userFolder = $this->rootFolder->getUserFolder($mount->getUser()->getUID());
-			$nodes = $userFolder->getById((int)$fileInput);
-			if (!$nodes) {
-				return null;
-			}
-			return $nodes[0];
+			return $userFolder->getFirstNodeById((int)$fileInput);
 		} else {
 			try {
 				return $this->rootFolder->get($fileInput);

core/Controller/PreviewController.php

 		}
 
 		$userFolder = $this->root->getUserFolder($this->userId);
-		$nodes = $userFolder->getById($fileId);
+		$node = $userFolder->getFirstNodeById($fileId);
 
-		if (\count($nodes) === 0) {
+		if (!$node) {
 			return new DataResponse([], Http::STATUS_NOT_FOUND);
 		}
 
-		$node = array_pop($nodes);
-
 		return $this->fetchPreview($node, $x, $y, $a, $forceIcon, $mode, $mimeFallback);
 	}
 

lib/private/Collaboration/Reference/File/FileReferenceProvider.php

 use OCP\Files\IMimeTypeDetector;
 use OCP\Files\InvalidPathException;
 use OCP\Files\IRootFolder;
-use OCP\Files\Node;
 use OCP\Files\NotFoundException;
 use OCP\Files\NotPermittedException;
 use OCP\IL10N;
 
 		try {
 			$userFolder = $this->rootFolder->getUserFolder($this->userId);
-			$files = $userFolder->getById($fileId);
+			$file = $userFolder->getFirstNodeById($fileId);
 
-			if (empty($files)) {
+			if (!$file) {
 				throw new NotFoundException();
 			}
 
-			/** @var Node $file */
-			$file = array_shift($files);
-
 			$reference->setTitle($file->getName());
 			$reference->setDescription($file->getMimetype());
 			$reference->setUrl($this->urlGenerator->getAbsoluteURL('/index.php/f/' . $fileId));

lib/private/DirectEditing/Manager.php

 		if ($filePath !== null) {
 			return $userFolder->get($filePath);
 		}
-		$files = $userFolder->getById($fileId);
-		if (count($files) === 0) {
+		$file = $userFolder->getFirstNodeById($fileId);
+		if (!$file) {
 			throw new NotFoundException('File nound found by id ' . $fileId);
 		}
-		return $files[0];
+		return $file;
 	}
 
 	public function isEnabled(): bool {

lib/private/Files/Config/CachedMountInfo.php

 		// TODO injection etc
 		Filesystem::initMountPoints($this->getUser()->getUID());
 		$userNode = \OC::$server->getUserFolder($this->getUser()->getUID());
-		$nodes = $userNode->getParent()->getById($this->getRootId());
-		if (count($nodes) > 0) {
-			return $nodes[0];
-		} else {
-			return null;
-		}
+		return $userNode->getParent()->getFirstNodeById($this->getRootId());
 	}
 
 	/**

lib/private/Files/Node/Folder.php

 	}
 
 	public function getFirstNodeById(int $id): ?\OCP\Files\Node {
-		return current($this->getById($id));
+		return current($this->getById($id)) ?: null;
 	}
 
 	protected function getAppDataDirectoryName(): string {

lib/private/FilesMetadata/Job/UpdateSingleMetadata.php

 		[$userId, $fileId] = $argument;
 
 		try {
-			$node = $this->rootFolder->getUserFolder($userId)->getById($fileId);
-			if (count($node) > 0) {
-				$file = array_shift($node);
-				$this->filesMetadataManager->refreshMetadata($file, IFilesMetadataManager::PROCESS_BACKGROUND);
+			$node = $this->rootFolder->getUserFolder($userId)->getFirstNodeById($fileId);
+			if ($node) {
+				$this->filesMetadataManager->refreshMetadata($node, IFilesMetadataManager::PROCESS_BACKGROUND);
 			}
 		} catch (\Exception $e) {
 			$this->logger->warning('issue while running UpdateSingleMetadata', ['exception' => $e, 'userId' => $userId, 'fileId' => $fileId]);

lib/private/Share20/Manager.php

 			$mount = $userMount->getMountPoint();
 			// When it's a reshare use the parent share permissions as maximum
 			$userMountPointId = $mount->getStorageRootId();
-			$userMountPoints = $userFolder->getById($userMountPointId);
-			$userMountPoint = array_shift($userMountPoints);
+			$userMountPoint = $userFolder->getFirstNodeById($userMountPointId);
 
 			if ($userMountPoint === null) {
 				throw new GenericShareException('Could not get proper user mount for ' . $userMountPointId . '. Failing since else the next calls are called with null');
 		//Get node for the owner and correct the owner in case of external storage
 		$userFolder = $this->rootFolder->getUserFolder($owner);
 		if ($path->getId() !== $userFolder->getId() && !$userFolder->isSubNode($path)) {
-			$nodes = $userFolder->getById($path->getId());
-			$path = array_shift($nodes);
+			$path = $userFolder->getFirstNodeById($path->getId());
 			if ($path === null || $path->getOwner() === null) {
 				return [];
 			}

lib/private/Share20/Share.php

 				$userFolder = $this->rootFolder->getUserFolder($this->sharedBy);
 			}
 
-			$nodes = $userFolder->getById($this->fileId);
-			if (empty($nodes)) {
+			$node = $userFolder->getFirstNodeById($this->fileId);
+			if (!$node) {
 				throw new NotFoundException('Node for share not found, fileid: ' . $this->fileId);
 			}
 
-			$this->node = $nodes[0];
+			$this->node = $node;
 		}
 
 		return $this->node;
 	/**
 	 * @inheritdoc
 	 */
-	public function getNodeId() {
+	public function getNodeId(): int {
 		if ($this->fileId === null) {
 			$this->fileId = $this->getNode()->getId();
 		}
 
-		return $this->fileId;
+		if ($this->fileId === null) {
+			throw new NotFoundException("Share source not found");
+		} else {
+			return $this->fileId;
+		}
 	}
 
 	/**

lib/private/SpeechToText/TranscriptionJob.php

 		try {
 			\OC_Util::setupFS($owner);
 			$userFolder = $this->rootFolder->getUserFolder($owner);
-			$file = current($userFolder->getById($fileId));
+			$file = $userFolder->getFirstNodeById($fileId);
 			if (!($file instanceof File)) {
 				$this->logger->warning('Transcription of file ' . $fileId . ' failed. The file could not be found');
 				$this->eventDispatcher->dispatchTyped(

lib/public/Share/IShare.php

 	 * @since 9.0.0
 	 * @throws NotFoundException
 	 */
-	public function getNodeId();
+	public function getNodeId(): int;
 
 	/**
 	 * Set the type of node (file/folder)

tests/lib/Share20/DefaultShareProviderTest.php

 
 		$ownerPath = $this->createMock(File::class);
 		$shareOwnerFolder = $this->createMock(Folder::class);
-		$shareOwnerFolder->method('getById')->with(42)->willReturn([$ownerPath]);
+		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($ownerPath);
 
 		$this->rootFolder
 			->method('getUserFolder')
 		$ownerPath = $this->createMock(File::class);
 
 		$shareOwnerFolder = $this->createMock(Folder::class);
-		$shareOwnerFolder->method('getById')->with(42)->willReturn([$ownerPath]);
+		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($ownerPath);
 
 		$this->rootFolder
 			->method('getUserFolder')
 
 		$ownerPath = $this->createMock(Folder::class);
 		$shareOwnerFolder = $this->createMock(Folder::class);
-		$shareOwnerFolder->method('getById')->with(42)->willReturn([$ownerPath]);
+		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($ownerPath);
 
 		$this->rootFolder
 				->method('getUserFolder')
 		$node->method('getId')->willReturn(42);
 
 		$this->rootFolder->method('getUserFolder')->with('user0')->willReturnSelf();
-		$this->rootFolder->method('getById')->willReturn([$node]);
+		$this->rootFolder->method('getFirstNodeById')->willReturn($node);
 
 		$this->userManager->method('get')->willReturnMap([
 			['user0', $user0],
 
 		$ownerPath = $this->createMock(Folder::class);
 		$shareOwnerFolder = $this->createMock(Folder::class);
-		$shareOwnerFolder->method('getById')->with(42)->willReturn([$ownerPath]);
+		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($ownerPath);
 
 		$this->rootFolder
 				->method('getUserFolder')
 
 		$ownerPath = $this->createMock(Folder::class);
 		$ownerFolder = $this->createMock(Folder::class);
-		$ownerFolder->method('getById')->willReturn([$ownerPath]);
+		$ownerFolder->method('getFirstNodeById')->willReturn($ownerPath);
 
 		$this->rootFolder
 			->method('getUserFolder')
 				['shareOwner', $ownerFolder],
 			]);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(100)
-			->willReturn([$path]);
-		$ownerFolder->method('getById')
+			->willReturn($path);
+		$ownerFolder->method('getFirstNodeById')
 			->with(100)
-			->willReturn([$path]);
+			->willReturn($path);
 
 		$share->setShareType(IShare::TYPE_USER);
 		$share->setSharedWith('sharedWith');
 				['shareOwner', $ownerFolder],
 			]);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with(100)
-			->willReturn([$path]);
-		$ownerFolder->method('getById')
+			->willReturn($path);
+		$ownerFolder->method('getFirstNodeById')
 			->with(100)
-			->willReturn([$path]);
+			->willReturn($path);
 
 		$share->setShareType(IShare::TYPE_GROUP);
 		$share->setSharedWith('sharedWith');
 					['shareOwner', $ownerFolder],
 				]);
 
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 				->with(100)
-				->willReturn([$path]);
-		$ownerFolder->method('getById')
+				->willReturn($path);
+		$ownerFolder->method('getFirstNodeById')
 				->with(100)
-				->willReturn([$path]);
+				->willReturn($path);
 
 		$share->setShareType(IShare::TYPE_LINK);
 		$share->setSharedBy('sharedBy');
 		$file = $this->createMock(File::class);
 
 		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(42)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(42)->willReturn($file);
 
 		$share = $this->provider->getShareByToken('secrettoken');
 		$this->assertEquals($id, $share->getId());
 
 		$file = $this->createMock(File::class);
 		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getById')->with($fileId)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with($fileId)->willReturn($file);
 
 		$share = $this->provider->getSharedWith('sharedWith', IShare::TYPE_USER, null, 1, 0);
 		$this->assertCount(1, $share);
 
 		$file = $this->createMock(File::class);
 		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getById')->with($fileId)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with($fileId)->willReturn($file);
 
 		$share = $this->provider->getSharedWith('sharedWith', IShare::TYPE_GROUP, null, 20, 1);
 		$this->assertCount(1, $share);
 
 		$file = $this->createMock(File::class);
 		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getById')->with($fileId)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with($fileId)->willReturn($file);
 
 		$share = $this->provider->getSharedWith('user', IShare::TYPE_GROUP, null, -1, 0);
 		$this->assertCount(1, $share);
 		$file->method('getId')->willReturn($fileId2);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->with($fileId2)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with($fileId2)->willReturn($file);
 
 		$share = $this->provider->getSharedWith('user0', IShare::TYPE_USER, $file, -1, 0);
 		$this->assertCount(1, $share);
 		$node = $this->createMock(Folder::class);
 		$node->method('getId')->willReturn($fileId2);
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->with($fileId2)->willReturn([$node]);
+		$this->rootFolder->method('getFirstNodeById')->with($fileId2)->willReturn($node);
 
 		$share = $this->provider->getSharedWith('user0', IShare::TYPE_GROUP, $node, -1, 0);
 		$this->assertCount(1, $share);
 
 		$file = $this->createMock(File::class);
 		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getById')->with($deletedFileId)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with($deletedFileId)->willReturn($file);
 
 		$groups = [];
 		foreach (range(0, 100) as $i) {
 
 		$file = $this->createMock(File::class);
 		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(42)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(42)->willReturn($file);
 
 		$share = $this->provider->getSharesBy('sharedBy', IShare::TYPE_USER, null, false, 1, 0);
 		$this->assertCount(1, $share);
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(42);
 		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(42)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(42)->willReturn($file);
 
 		$share = $this->provider->getSharesBy('sharedBy', IShare::TYPE_USER, $file, false, 1, 0);
 		$this->assertCount(1, $share);
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(42);
 		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(42)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(42)->willReturn($file);
 
 		$shares = $this->provider->getSharesBy('shareOwner', IShare::TYPE_USER, null, true, -1, 0);
 		$this->assertCount(2, $shares);
 		$file->method('getId')->willReturn(1);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(1)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
 
 		$share = $this->provider->getShareById($id);
 
 		$file->method('getId')->willReturn(1);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(1)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
 
 		$share = $this->provider->getShareById($id);
 
 		$file->method('getId')->willReturn(1);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(1)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
 
 		$share = $this->provider->getShareById($id);
 
 		$file->method('getId')->willReturn(1);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(1)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
 
 		$share = $this->provider->getShareById($id);
 
 		$file->method('getId')->willReturn(1);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(1)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
 
 		$share = $this->provider->getShareById($id);
 
 		$file->method('getId')->willReturn(1);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(1)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
 
 		$share = $this->provider->getShareById($id);
 
 		$file->method('getId')->willReturn(1);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->with(1)->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
 
 		$share = $this->provider->getShareById($id);
 
 		$file2->method('getId')->willReturn(43);
 
 		$folder1 = $this->createMock(Folder::class);
-		$folder1->method('getById')->with(42)->willReturn([$file1]);
+		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
 		$folder2 = $this->createMock(Folder::class);
-		$folder2->method('getById')->with(43)->willReturn([$file2]);
+		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
 			['user2', $folder1],
 		$file2->method('getId')->willReturn(43);
 
 		$folder1 = $this->createMock(Folder::class);
-		$folder1->method('getById')->with(42)->willReturn([$file1]);
+		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
 		$folder2 = $this->createMock(Folder::class);
-		$folder2->method('getById')->with(43)->willReturn([$file2]);
+		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
 			['user2', $folder1],
 		$file2->method('getId')->willReturn(43);
 
 		$folder1 = $this->createMock(Folder::class);
-		$folder1->method('getById')->with(42)->willReturn([$file1]);
+		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
 		$folder2 = $this->createMock(Folder::class);
-		$folder2->method('getById')->with(43)->willReturn([$file2]);
+		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
 			['user2', $folder1],
 		$file2->method('getId')->willReturn(43);
 
 		$folder1 = $this->createMock(Folder::class);
-		$folder1->method('getById')->with(42)->willReturn([$file1]);
+		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
 		$folder2 = $this->createMock(Folder::class);
-		$folder2->method('getById')->with(43)->willReturn([$file2]);
+		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
 			['user2', $folder1],
 		$file2->method('getId')->willReturn(43);
 
 		$folder1 = $this->createMock(Folder::class);
-		$folder1->method('getById')->with(42)->willReturn([$file1]);
+		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
 		$folder2 = $this->createMock(Folder::class);
-		$folder2->method('getById')->with(43)->willReturn([$file2]);
+		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
 			['user2', $folder1],
 		$file->method('getId')->willReturn(42);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->willReturn([$file]);
+		$this->rootFolder->method('getFirstNodeById')->willReturn($file);
 
 		$share = $this->provider->getShareById($id, null);
 
 		$folder->method('getId')->willReturn(42);
 
 		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getById')->willReturn([$folder]);
+		$this->rootFolder->method('getFirstNodeById')->willReturn($folder);
 
 		$share = $this->provider->getShareById($id, 'user0');
 
 
 		$ownerPath1 = $this->createMock(File::class);
 		$shareOwner1Folder = $this->createMock(Folder::class);
-		$shareOwner1Folder->method('getById')->willReturn([$ownerPath1]);
+		$shareOwner1Folder->method('getFirstNodeById')->willReturn($ownerPath1);
 
 		$ownerPath2 = $this->createMock(File::class);
 		$shareOwner2Folder = $this->createMock(Folder::class);
-		$shareOwner2Folder->method('getById')->willReturn([$ownerPath2]);
+		$shareOwner2Folder->method('getFirstNodeById')->willReturn($ownerPath2);
 
 		$ownerPath3 = $this->createMock(File::class);
 		$shareOwner3Folder = $this->createMock(Folder::class);
-		$shareOwner3Folder->method('getById')->willReturn([$ownerPath3]);
+		$shareOwner3Folder->method('getFirstNodeById')->willReturn($ownerPath3);
 
 		$ownerPath4 = $this->createMock(File::class);
 		$shareOwner4Folder = $this->createMock(Folder::class);
-		$shareOwner4Folder->method('getById')->willReturn([$ownerPath4]);
+		$shareOwner4Folder->method('getFirstNodeById')->willReturn($ownerPath4);
 
 		$ownerPath5 = $this->createMock(File::class);
 		$shareOwner5Folder = $this->createMock(Folder::class);
-		$shareOwner5Folder->method('getById')->willReturn([$ownerPath5]);
+		$shareOwner5Folder->method('getFirstNodeById')->willReturn($ownerPath5);
 
 		$this->rootFolder
 			->method('getUserFolder')

tests/lib/Share20/ManagerTest.php

 			->willReturn(42);
 		// Id 108 is used in the data to refer to the node of the share.
 		$userFolder->expects($this->any())
-			->method('getById')
+			->method('getFirstNodeById')
 			->with(108)
-			->willReturn([$share->getNode()]);
+			->willReturn($share->getNode());
 		$userFolder->expects($this->any())
 			->method('getRelativePath')
 			->willReturnArgument(0);
 			->willReturn($userFolder);
 		$folder->method('getPath')
 			->willReturn('/owner/files/folder');
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with($this->equalTo(42))
-			->willReturn([12 => $file]);
+			->willReturn($file);
 		$userFolder->method('getPath')
 			->willReturn('/user1/files');
 
 			->willReturn($userFolder);
 		$folder->method('getPath')
 			->willReturn('/owner/files/folder');
-		$userFolder->method('getById')
+		$userFolder->method('getFirstNodeById')
 			->with($this->equalTo(42))
-			->willReturn([42 => $file]);
+			->willReturn($file);
 		$userFolder->method('getPath')
 			->willReturn('/user1/files');