nextcloud / server

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

Indentation +698 added lines, -698 removed lines

@@ -40,702 +40,702 @@
 use Sabre\HTTP\ResponseInterface;
 
 class FilesPlugin extends ServerPlugin {
-	// namespace
-	public const NS_OWNCLOUD = 'http://owncloud.org/ns';
-	public const NS_NEXTCLOUD = 'http://nextcloud.org/ns';
-	public const FILEID_PROPERTYNAME = '{http://owncloud.org/ns}id';
-	public const INTERNAL_FILEID_PROPERTYNAME = '{http://owncloud.org/ns}fileid';
-	public const PERMISSIONS_PROPERTYNAME = '{http://owncloud.org/ns}permissions';
-	public const SHARE_PERMISSIONS_PROPERTYNAME = '{http://open-collaboration-services.org/ns}share-permissions';
-	public const OCM_SHARE_PERMISSIONS_PROPERTYNAME = '{http://open-cloud-mesh.org/ns}share-permissions';
-	public const SHARE_ATTRIBUTES_PROPERTYNAME = '{http://nextcloud.org/ns}share-attributes';
-	public const DOWNLOADURL_PROPERTYNAME = '{http://owncloud.org/ns}downloadURL';
-	public const SIZE_PROPERTYNAME = '{http://owncloud.org/ns}size';
-	public const GETETAG_PROPERTYNAME = '{DAV:}getetag';
-	public const LASTMODIFIED_PROPERTYNAME = '{DAV:}lastmodified';
-	public const CREATIONDATE_PROPERTYNAME = '{DAV:}creationdate';
-	public const DISPLAYNAME_PROPERTYNAME = '{DAV:}displayname';
-	public const OWNER_ID_PROPERTYNAME = '{http://owncloud.org/ns}owner-id';
-	public const OWNER_DISPLAY_NAME_PROPERTYNAME = '{http://owncloud.org/ns}owner-display-name';
-	public const CHECKSUMS_PROPERTYNAME = '{http://owncloud.org/ns}checksums';
-	public const DATA_FINGERPRINT_PROPERTYNAME = '{http://owncloud.org/ns}data-fingerprint';
-	public const HAS_PREVIEW_PROPERTYNAME = '{http://nextcloud.org/ns}has-preview';
-	public const MOUNT_TYPE_PROPERTYNAME = '{http://nextcloud.org/ns}mount-type';
-	public const MOUNT_ROOT_PROPERTYNAME = '{http://nextcloud.org/ns}is-mount-root';
-	public const IS_FEDERATED_PROPERTYNAME = '{http://nextcloud.org/ns}is-federated';
-	public const METADATA_ETAG_PROPERTYNAME = '{http://nextcloud.org/ns}metadata_etag';
-	public const UPLOAD_TIME_PROPERTYNAME = '{http://nextcloud.org/ns}upload_time';
-	public const CREATION_TIME_PROPERTYNAME = '{http://nextcloud.org/ns}creation_time';
-	public const SHARE_NOTE = '{http://nextcloud.org/ns}note';
-	public const SHARE_HIDE_DOWNLOAD_PROPERTYNAME = '{http://nextcloud.org/ns}hide-download';
-	public const SUBFOLDER_COUNT_PROPERTYNAME = '{http://nextcloud.org/ns}contained-folder-count';
-	public const SUBFILE_COUNT_PROPERTYNAME = '{http://nextcloud.org/ns}contained-file-count';
-	public const FILE_METADATA_PREFIX = '{http://nextcloud.org/ns}metadata-';
-	public const HIDDEN_PROPERTYNAME = '{http://nextcloud.org/ns}hidden';
-
-	/** Reference to main server object */
-	private ?Server $server = null;
-
-	/**
-	 * @param Tree $tree
-	 * @param IConfig $config
-	 * @param IRequest $request
-	 * @param IPreview $previewManager
-	 * @param IUserSession $userSession
-	 * @param bool $isPublic Whether this is public WebDAV. If true, some returned information will be stripped off.
-	 * @param bool $downloadAttachment
-	 * @return void
-	 */
-	public function __construct(
-		private Tree $tree,
-		private IConfig $config,
-		private IRequest $request,
-		private IPreview $previewManager,
-		private IUserSession $userSession,
-		private IFilenameValidator $validator,
-		private IAccountManager $accountManager,
-		private bool $isPublic = false,
-		private bool $downloadAttachment = true,
-	) {
-	}
-
-	/**
-	 * This initializes the plugin.
-	 *
-	 * This function is called by \Sabre\DAV\Server, after
-	 * addPlugin is called.
-	 *
-	 * This method should set up the required event subscriptions.
-	 *
-	 * @return void
-	 */
-	public function initialize(Server $server) {
-		$server->xml->namespaceMap[self::NS_OWNCLOUD] = 'oc';
-		$server->xml->namespaceMap[self::NS_NEXTCLOUD] = 'nc';
-		$server->protectedProperties[] = self::FILEID_PROPERTYNAME;
-		$server->protectedProperties[] = self::INTERNAL_FILEID_PROPERTYNAME;
-		$server->protectedProperties[] = self::PERMISSIONS_PROPERTYNAME;
-		$server->protectedProperties[] = self::SHARE_PERMISSIONS_PROPERTYNAME;
-		$server->protectedProperties[] = self::OCM_SHARE_PERMISSIONS_PROPERTYNAME;
-		$server->protectedProperties[] = self::SHARE_ATTRIBUTES_PROPERTYNAME;
-		$server->protectedProperties[] = self::SIZE_PROPERTYNAME;
-		$server->protectedProperties[] = self::DOWNLOADURL_PROPERTYNAME;
-		$server->protectedProperties[] = self::OWNER_ID_PROPERTYNAME;
-		$server->protectedProperties[] = self::OWNER_DISPLAY_NAME_PROPERTYNAME;
-		$server->protectedProperties[] = self::CHECKSUMS_PROPERTYNAME;
-		$server->protectedProperties[] = self::DATA_FINGERPRINT_PROPERTYNAME;
-		$server->protectedProperties[] = self::HAS_PREVIEW_PROPERTYNAME;
-		$server->protectedProperties[] = self::MOUNT_TYPE_PROPERTYNAME;
-		$server->protectedProperties[] = self::IS_FEDERATED_PROPERTYNAME;
-		$server->protectedProperties[] = self::SHARE_NOTE;
-
-		// normally these cannot be changed (RFC4918), but we want them modifiable through PROPPATCH
-		$allowedProperties = ['{DAV:}getetag'];
-		$server->protectedProperties = array_diff($server->protectedProperties, $allowedProperties);
-
-		$this->server = $server;
-		$this->server->on('propFind', [$this, 'handleGetProperties']);
-		$this->server->on('propPatch', [$this, 'handleUpdateProperties']);
-		$this->server->on('afterBind', [$this, 'sendFileIdHeader']);
-		$this->server->on('afterWriteContent', [$this, 'sendFileIdHeader']);
-		$this->server->on('afterMethod:GET', [$this,'httpGet']);
-		$this->server->on('afterMethod:GET', [$this, 'handleDownloadToken']);
-		$this->server->on('afterResponse', function ($request, ResponseInterface $response): void {
-			$body = $response->getBody();
-			if (is_resource($body)) {
-				fclose($body);
-			}
-		});
-		$this->server->on('beforeMove', [$this, 'checkMove']);
-		$this->server->on('beforeCopy', [$this, 'checkCopy']);
-	}
-
-	/**
-	 * Plugin that checks if a copy can actually be performed.
-	 *
-	 * @param string $source source path
-	 * @param string $target target path
-	 * @throws NotFound If the source does not exist
-	 * @throws InvalidPath If the target is invalid
-	 */
-	public function checkCopy($source, $target): void {
-		$sourceNode = $this->tree->getNodeForPath($source);
-		if (!$sourceNode instanceof Node) {
-			return;
-		}
-
-		// Ensure source exists
-		$sourceNodeFileInfo = $sourceNode->getFileInfo();
-		if ($sourceNodeFileInfo === null) {
-			throw new NotFound($source . ' does not exist');
-		}
-		// Ensure the target name is valid
-		try {
-			[$targetPath, $targetName] = \Sabre\Uri\split($target);
-			$this->validator->validateFilename($targetName);
-		} catch (InvalidPathException $e) {
-			throw new InvalidPath($e->getMessage(), false);
-		}
-		// Ensure the target path is valid
-		$segments = array_slice(explode('/', $targetPath), 2);
-		foreach ($segments as $segment) {
-			if ($this->validator->isFilenameValid($segment) === false) {
-				$l = \OCP\Server::get(IFactory::class)->get('dav');
-				throw new InvalidPath($l->t('Invalid target path'));
-			}
-		}
-	}
-
-	/**
-	 * Plugin that checks if a move can actually be performed.
-	 *
-	 * @param string $source source path
-	 * @param string $target target path
-	 * @throws Forbidden If the source is not deletable
-	 * @throws NotFound If the source does not exist
-	 * @throws InvalidPath If the target name is invalid
-	 */
-	public function checkMove(string $source, string $target): void {
-		$sourceNode = $this->tree->getNodeForPath($source);
-		if (!$sourceNode instanceof Node) {
-			return;
-		}
-
-		// First check copyable (move only needs additional delete permission)
-		$this->checkCopy($source, $target);
-
-		// The source needs to be deletable for moving
-		$sourceNodeFileInfo = $sourceNode->getFileInfo();
-		if (!$sourceNodeFileInfo->isDeletable()) {
-			throw new Forbidden($source . ' cannot be deleted');
-		}
-
-		// The source is not allowed to be the parent of the target
-		if (str_starts_with($source, $target . '/')) {
-			throw new Forbidden($source . ' cannot be moved to it\'s parent');
-		}
-	}
-
-	/**
-	 * This sets a cookie to be able to recognize the start of the download
-	 * the content must not be longer than 32 characters and must only contain
-	 * alphanumeric characters
-	 *
-	 * @param RequestInterface $request
-	 * @param ResponseInterface $response
-	 */
-	public function handleDownloadToken(RequestInterface $request, ResponseInterface $response) {
-		$queryParams = $request->getQueryParameters();
-
-		/**
-		 * this sets a cookie to be able to recognize the start of the download
-		 * the content must not be longer than 32 characters and must only contain
-		 * alphanumeric characters
-		 */
-		if (isset($queryParams['downloadStartSecret'])) {
-			$token = $queryParams['downloadStartSecret'];
-			if (!isset($token[32])
-				&& preg_match('!^[a-zA-Z0-9]+$!', $token) === 1) {
-				// FIXME: use $response->setHeader() instead
-				setcookie('ocDownloadStarted', $token, time() + 20, '/');
-			}
-		}
-	}
-
-	/**
-	 * Add headers to file download
-	 *
-	 * @param RequestInterface $request
-	 * @param ResponseInterface $response
-	 */
-	public function httpGet(RequestInterface $request, ResponseInterface $response) {
-		// Only handle valid files
-		$node = $this->tree->getNodeForPath($request->getPath());
-		if (!($node instanceof IFile)) {
-			return;
-		}
-
-		// adds a 'Content-Disposition: attachment' header in case no disposition
-		// header has been set before
-		if ($this->downloadAttachment
-			&& $response->getHeader('Content-Disposition') === null) {
-			$filename = $node->getName();
-			if ($this->request->isUserAgent(
-				[
-					Request::USER_AGENT_IE,
-					Request::USER_AGENT_ANDROID_MOBILE_CHROME,
-					Request::USER_AGENT_FREEBOX,
-				])) {
-				$response->addHeader('Content-Disposition', 'attachment; filename="' . rawurlencode($filename) . '"');
-			} else {
-				$response->addHeader('Content-Disposition', 'attachment; filename*=UTF-8\'\'' . rawurlencode($filename)
-													 . '; filename="' . rawurlencode($filename) . '"');
-			}
-		}
-
-		if ($node instanceof File) {
-			//Add OC-Checksum header
-			$checksum = $node->getChecksum();
-			if ($checksum !== null && $checksum !== '') {
-				$response->addHeader('OC-Checksum', $checksum);
-			}
-		}
-		$response->addHeader('X-Accel-Buffering', 'no');
-	}
-
-	/**
-	 * Adds all ownCloud-specific properties
-	 *
-	 * @param PropFind $propFind
-	 * @param \Sabre\DAV\INode $node
-	 * @return void
-	 */
-	public function handleGetProperties(PropFind $propFind, \Sabre\DAV\INode $node) {
-		$httpRequest = $this->server->httpRequest;
-
-		if ($node instanceof Node) {
-			/**
-			 * This was disabled, because it made dir listing throw an exception,
-			 * so users were unable to navigate into folders where one subitem
-			 * is blocked by the files_accesscontrol app, see:
-			 * https://github.com/nextcloud/files_accesscontrol/issues/65
-			 * if (!$node->getFileInfo()->isReadable()) {
-			 *     // avoid detecting files through this means
-			 *     throw new NotFound();
-			 * }
-			 */
-
-			$propFind->handle(self::FILEID_PROPERTYNAME, function () use ($node) {
-				return $node->getFileId();
-			});
-
-			$propFind->handle(self::INTERNAL_FILEID_PROPERTYNAME, function () use ($node) {
-				return $node->getInternalFileId();
-			});
-
-			$propFind->handle(self::PERMISSIONS_PROPERTYNAME, function () use ($node) {
-				$perms = $node->getDavPermissions();
-				if ($this->isPublic) {
-					// remove mount information
-					$perms = str_replace(['S', 'M'], '', $perms);
-				}
-				return $perms;
-			});
-
-			$propFind->handle(self::SHARE_PERMISSIONS_PROPERTYNAME, function () use ($node, $httpRequest) {
-				$user = $this->userSession->getUser();
-				if ($user === null) {
-					return null;
-				}
-				return $node->getSharePermissions(
-					$user->getUID()
-				);
-			});
-
-			$propFind->handle(self::OCM_SHARE_PERMISSIONS_PROPERTYNAME, function () use ($node, $httpRequest): ?string {
-				$user = $this->userSession->getUser();
-				if ($user === null) {
-					return null;
-				}
-				$ncPermissions = $node->getSharePermissions(
-					$user->getUID()
-				);
-				$ocmPermissions = $this->ncPermissions2ocmPermissions($ncPermissions);
-				return json_encode($ocmPermissions, JSON_THROW_ON_ERROR);
-			});
-
-			$propFind->handle(self::SHARE_ATTRIBUTES_PROPERTYNAME, function () use ($node, $httpRequest) {
-				return json_encode($node->getShareAttributes(), JSON_THROW_ON_ERROR);
-			});
-
-			$propFind->handle(self::GETETAG_PROPERTYNAME, function () use ($node): string {
-				return $node->getETag();
-			});
-
-			$propFind->handle(self::OWNER_ID_PROPERTYNAME, function () use ($node): ?string {
-				$owner = $node->getOwner();
-				if (!$owner) {
-					return null;
-				} else {
-					return $owner->getUID();
-				}
-			});
-			$propFind->handle(self::OWNER_DISPLAY_NAME_PROPERTYNAME, function () use ($node): ?string {
-				$owner = $node->getOwner();
-				if (!$owner) {
-					return null;
-				}
-
-				// Get current user to see if we're in a public share or not
-				$user = $this->userSession->getUser();
-
-				// If the user is logged in, we can return the display name
-				if ($user !== null) {
-					return $owner->getDisplayName();
-				}
-
-				// Check if the user published their display name
-				try {
-					$ownerAccount = $this->accountManager->getAccount($owner);
-				} catch (NoUserException) {
-					// do not lock process if owner is not local
-					return null;
-				}
-
-				$ownerNameProperty = $ownerAccount->getProperty(IAccountManager::PROPERTY_DISPLAYNAME);
-
-				// Since we are not logged in, we need to have at least the published scope
-				if ($ownerNameProperty->getScope() === IAccountManager::SCOPE_PUBLISHED) {
-					return $owner->getDisplayName();
-				}
-
-				return null;
-			});
-
-			$propFind->handle(self::HAS_PREVIEW_PROPERTYNAME, function () use ($node) {
-				return json_encode($this->previewManager->isAvailable($node->getFileInfo()), JSON_THROW_ON_ERROR);
-			});
-			$propFind->handle(self::SIZE_PROPERTYNAME, function () use ($node): int|float {
-				return $node->getSize();
-			});
-			$propFind->handle(self::MOUNT_TYPE_PROPERTYNAME, function () use ($node) {
-				return $node->getFileInfo()->getMountPoint()->getMountType();
-			});
-
-			/**
-			 * This is a special property which is used to determine if a node
-			 * is a mount root or not, e.g. a shared folder.
-			 * If so, then the node can only be unshared and not deleted.
-			 * @see https://github.com/nextcloud/server/blob/cc75294eb6b16b916a342e69998935f89222619d/lib/private/Files/View.php#L696-L698
-			 */
-			$propFind->handle(self::MOUNT_ROOT_PROPERTYNAME, function () use ($node) {
-				return $node->getNode()->getInternalPath() === '' ? 'true' : 'false';
-			});
-
-			$propFind->handle(self::SHARE_NOTE, function () use ($node): ?string {
-				$user = $this->userSession->getUser();
-				return $node->getNoteFromShare(
-					$user?->getUID()
-				);
-			});
-
-			$propFind->handle(self::SHARE_HIDE_DOWNLOAD_PROPERTYNAME, function () use ($node) {
-				$storage = $node->getNode()->getStorage();
-				if ($storage->instanceOfStorage(ISharedStorage::class)) {
-					/** @var ISharedStorage $storage */
-					return match($storage->getShare()->getHideDownload()) {
-						true => 'true',
-						false => 'false',
-					};
-				} else {
-					return null;
-				}
-			});
-
-			$propFind->handle(self::DATA_FINGERPRINT_PROPERTYNAME, function () {
-				return $this->config->getSystemValue('data-fingerprint', '');
-			});
-			$propFind->handle(self::CREATIONDATE_PROPERTYNAME, function () use ($node) {
-				return (new \DateTimeImmutable())
-					->setTimestamp($node->getFileInfo()->getCreationTime())
-					->format(\DateTimeInterface::ATOM);
-			});
-			$propFind->handle(self::CREATION_TIME_PROPERTYNAME, function () use ($node) {
-				return $node->getFileInfo()->getCreationTime();
-			});
-
-			foreach ($node->getFileInfo()->getMetadata() as $metadataKey => $metadataValue) {
-				$propFind->handle(self::FILE_METADATA_PREFIX . $metadataKey, $metadataValue);
-			}
-
-			$propFind->handle(self::HIDDEN_PROPERTYNAME, function () use ($node) {
-				$isLivePhoto = isset($node->getFileInfo()->getMetadata()['files-live-photo']);
-				$isMovFile = $node->getFileInfo()->getMimetype() === 'video/quicktime';
-				return ($isLivePhoto && $isMovFile) ? 'true' : 'false';
-			});
-
-			/**
-			 * Return file/folder name as displayname. The primary reason to
-			 * implement it this way is to avoid costly fallback to
-			 * CustomPropertiesBackend (esp. visible when querying all files
-			 * in a folder).
-			 */
-			$propFind->handle(self::DISPLAYNAME_PROPERTYNAME, function () use ($node) {
-				return $node->getName();
-			});
-
-			$propFind->handle(self::IS_FEDERATED_PROPERTYNAME, function () use ($node) {
-				return $node->getFileInfo()->getMountPoint()
-					instanceof SharingExternalMount;
-			});
-		}
-
-		if ($node instanceof File) {
-			$propFind->handle(self::DOWNLOADURL_PROPERTYNAME, function () use ($node) {
-				try {
-					$directDownloadUrl = $node->getDirectDownload();
-					if (isset($directDownloadUrl['url'])) {
-						return $directDownloadUrl['url'];
-					}
-				} catch (StorageNotAvailableException $e) {
-					return false;
-				} catch (ForbiddenException $e) {
-					return false;
-				}
-				return false;
-			});
-
-			$propFind->handle(self::CHECKSUMS_PROPERTYNAME, function () use ($node) {
-				$checksum = $node->getChecksum();
-				if ($checksum === null || $checksum === '') {
-					return null;
-				}
-
-				return new ChecksumList($checksum);
-			});
-
-			$propFind->handle(self::UPLOAD_TIME_PROPERTYNAME, function () use ($node) {
-				return $node->getFileInfo()->getUploadTime();
-			});
-		}
-
-		if ($node instanceof Directory) {
-			$propFind->handle(self::SIZE_PROPERTYNAME, function () use ($node) {
-				return $node->getSize();
-			});
-
-			$requestProperties = $propFind->getRequestedProperties();
-
-			if (in_array(self::SUBFILE_COUNT_PROPERTYNAME, $requestProperties, true)
-				|| in_array(self::SUBFOLDER_COUNT_PROPERTYNAME, $requestProperties, true)) {
-				$nbFiles = 0;
-				$nbFolders = 0;
-				foreach ($node->getChildren() as $child) {
-					if ($child instanceof File) {
-						$nbFiles++;
-					} elseif ($child instanceof Directory) {
-						$nbFolders++;
-					}
-				}
-
-				$propFind->handle(self::SUBFILE_COUNT_PROPERTYNAME, $nbFiles);
-				$propFind->handle(self::SUBFOLDER_COUNT_PROPERTYNAME, $nbFolders);
-			}
-		}
-	}
-
-	/**
-	 * translate Nextcloud permissions to OCM Permissions
-	 *
-	 * @param $ncPermissions
-	 * @return array
-	 */
-	protected function ncPermissions2ocmPermissions($ncPermissions) {
-		$ocmPermissions = [];
-
-		if ($ncPermissions & Constants::PERMISSION_SHARE) {
-			$ocmPermissions[] = 'share';
-		}
-
-		if ($ncPermissions & Constants::PERMISSION_READ) {
-			$ocmPermissions[] = 'read';
-		}
-
-		if (($ncPermissions & Constants::PERMISSION_CREATE)
-			|| ($ncPermissions & Constants::PERMISSION_UPDATE)) {
-			$ocmPermissions[] = 'write';
-		}
-
-		return $ocmPermissions;
-	}
-
-	/**
-	 * Update ownCloud-specific properties
-	 *
-	 * @param string $path
-	 * @param PropPatch $propPatch
-	 *
-	 * @return void
-	 */
-	public function handleUpdateProperties($path, PropPatch $propPatch) {
-		$node = $this->tree->getNodeForPath($path);
-		if (!($node instanceof Node)) {
-			return;
-		}
-
-		$propPatch->handle(self::LASTMODIFIED_PROPERTYNAME, function ($time) use ($node) {
-			if (empty($time)) {
-				return false;
-			}
-			$node->touch($time);
-			return true;
-		});
-		$propPatch->handle(self::GETETAG_PROPERTYNAME, function ($etag) use ($node) {
-			if (empty($etag)) {
-				return false;
-			}
-			return $node->setEtag($etag) !== -1;
-		});
-		$propPatch->handle(self::CREATIONDATE_PROPERTYNAME, function ($time) use ($node) {
-			if (empty($time)) {
-				return false;
-			}
-			$dateTime = new \DateTimeImmutable($time);
-			$node->setCreationTime($dateTime->getTimestamp());
-			return true;
-		});
-		$propPatch->handle(self::CREATION_TIME_PROPERTYNAME, function ($time) use ($node) {
-			if (empty($time)) {
-				return false;
-			}
-			$node->setCreationTime((int)$time);
-			return true;
-		});
-
-		$this->handleUpdatePropertiesMetadata($propPatch, $node);
-
-		/**
-		 * Disable modification of the displayname property for files and
-		 * folders via PROPPATCH. See PROPFIND for more information.
-		 */
-		$propPatch->handle(self::DISPLAYNAME_PROPERTYNAME, function ($displayName) {
-			return 403;
-		});
-	}
-
-
-	/**
-	 * handle the update of metadata from PROPPATCH requests
-	 *
-	 * @param PropPatch $propPatch
-	 * @param Node $node
-	 *
-	 * @throws FilesMetadataException
-	 */
-	private function handleUpdatePropertiesMetadata(PropPatch $propPatch, Node $node): void {
-		$userId = $this->userSession->getUser()?->getUID();
-		if ($userId === null) {
-			return;
-		}
-
-		$accessRight = $this->getMetadataFileAccessRight($node, $userId);
-		$filesMetadataManager = $this->initFilesMetadataManager();
-		$knownMetadata = $filesMetadataManager->getKnownMetadata();
-
-		foreach ($propPatch->getRemainingMutations() as $mutation) {
-			if (!str_starts_with($mutation, self::FILE_METADATA_PREFIX)) {
-				continue;
-			}
-
-			$propPatch->handle(
-				$mutation,
-				function (mixed $value) use ($accessRight, $knownMetadata, $node, $mutation, $filesMetadataManager): bool {
-					/** @var FilesMetadata $metadata */
-					$metadata = $filesMetadataManager->getMetadata((int)$node->getFileId(), true);
-					$metadata->setStorageId($node->getNode()->getStorage()->getCache()->getNumericStorageId());
-					$metadataKey = substr($mutation, strlen(self::FILE_METADATA_PREFIX));
-
-					// confirm metadata key is editable via PROPPATCH
-					if ($knownMetadata->getEditPermission($metadataKey) < $accessRight) {
-						throw new FilesMetadataException('you do not have enough rights to update \'' . $metadataKey . '\' on this node');
-					}
-
-					if ($value === null) {
-						$metadata->unset($metadataKey);
-						$filesMetadataManager->saveMetadata($metadata);
-						return true;
-					}
-
-					// If the metadata is unknown, it defaults to string.
-					try {
-						$type = $knownMetadata->getType($metadataKey);
-					} catch (FilesMetadataNotFoundException) {
-						$type = IMetadataValueWrapper::TYPE_STRING;
-					}
-
-					switch ($type) {
-						case IMetadataValueWrapper::TYPE_STRING:
-							$metadata->setString($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
-							break;
-						case IMetadataValueWrapper::TYPE_INT:
-							$metadata->setInt($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
-							break;
-						case IMetadataValueWrapper::TYPE_FLOAT:
-							$metadata->setFloat($metadataKey, $value);
-							break;
-						case IMetadataValueWrapper::TYPE_BOOL:
-							$metadata->setBool($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
-							break;
-						case IMetadataValueWrapper::TYPE_ARRAY:
-							$metadata->setArray($metadataKey, $value);
-							break;
-						case IMetadataValueWrapper::TYPE_STRING_LIST:
-							$metadata->setStringList($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
-							break;
-						case IMetadataValueWrapper::TYPE_INT_LIST:
-							$metadata->setIntList($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
-							break;
-					}
-
-					$filesMetadataManager->saveMetadata($metadata);
-
-					return true;
-				}
-			);
-		}
-	}
-
-	/**
-	 * init default internal metadata
-	 *
-	 * @return IFilesMetadataManager
-	 */
-	private function initFilesMetadataManager(): IFilesMetadataManager {
-		/** @var IFilesMetadataManager $manager */
-		$manager = \OCP\Server::get(IFilesMetadataManager::class);
-		$manager->initMetadata('files-live-photo', IMetadataValueWrapper::TYPE_STRING, false, IMetadataValueWrapper::EDIT_REQ_WRITE_PERMISSION);
-
-		return $manager;
-	}
-
-	/**
-	 * based on owner and shares, returns the bottom limit to update related metadata
-	 *
-	 * @param Node $node
-	 * @param string $userId
-	 *
-	 * @return int
-	 */
-	private function getMetadataFileAccessRight(Node $node, string $userId): int {
-		if ($node->getOwner()?->getUID() === $userId) {
-			return IMetadataValueWrapper::EDIT_REQ_OWNERSHIP;
-		} else {
-			$filePermissions = $node->getSharePermissions($userId);
-			if ($filePermissions & Constants::PERMISSION_UPDATE) {
-				return IMetadataValueWrapper::EDIT_REQ_WRITE_PERMISSION;
-			}
-		}
-
-		return IMetadataValueWrapper::EDIT_REQ_READ_PERMISSION;
-	}
-
-	/**
-	 * @param string $filePath
-	 * @param ?\Sabre\DAV\INode $node
-	 * @return void
-	 * @throws \Sabre\DAV\Exception\BadRequest
-	 */
-	public function sendFileIdHeader($filePath, ?\Sabre\DAV\INode $node = null) {
-		// we get the node for the given $filePath here because in case of afterCreateFile $node is the parent folder
-		try {
-			$node = $this->server->tree->getNodeForPath($filePath);
-			if ($node instanceof Node) {
-				$fileId = $node->getFileId();
-				if (!is_null($fileId)) {
-					$this->server->httpResponse->setHeader('OC-FileId', $fileId);
-				}
-			}
-		} catch (NotFound) {
-		}
-	}
+    // namespace
+    public const NS_OWNCLOUD = 'http://owncloud.org/ns';
+    public const NS_NEXTCLOUD = 'http://nextcloud.org/ns';
+    public const FILEID_PROPERTYNAME = '{http://owncloud.org/ns}id';
+    public const INTERNAL_FILEID_PROPERTYNAME = '{http://owncloud.org/ns}fileid';
+    public const PERMISSIONS_PROPERTYNAME = '{http://owncloud.org/ns}permissions';
+    public const SHARE_PERMISSIONS_PROPERTYNAME = '{http://open-collaboration-services.org/ns}share-permissions';
+    public const OCM_SHARE_PERMISSIONS_PROPERTYNAME = '{http://open-cloud-mesh.org/ns}share-permissions';
+    public const SHARE_ATTRIBUTES_PROPERTYNAME = '{http://nextcloud.org/ns}share-attributes';
+    public const DOWNLOADURL_PROPERTYNAME = '{http://owncloud.org/ns}downloadURL';
+    public const SIZE_PROPERTYNAME = '{http://owncloud.org/ns}size';
+    public const GETETAG_PROPERTYNAME = '{DAV:}getetag';
+    public const LASTMODIFIED_PROPERTYNAME = '{DAV:}lastmodified';
+    public const CREATIONDATE_PROPERTYNAME = '{DAV:}creationdate';
+    public const DISPLAYNAME_PROPERTYNAME = '{DAV:}displayname';
+    public const OWNER_ID_PROPERTYNAME = '{http://owncloud.org/ns}owner-id';
+    public const OWNER_DISPLAY_NAME_PROPERTYNAME = '{http://owncloud.org/ns}owner-display-name';
+    public const CHECKSUMS_PROPERTYNAME = '{http://owncloud.org/ns}checksums';
+    public const DATA_FINGERPRINT_PROPERTYNAME = '{http://owncloud.org/ns}data-fingerprint';
+    public const HAS_PREVIEW_PROPERTYNAME = '{http://nextcloud.org/ns}has-preview';
+    public const MOUNT_TYPE_PROPERTYNAME = '{http://nextcloud.org/ns}mount-type';
+    public const MOUNT_ROOT_PROPERTYNAME = '{http://nextcloud.org/ns}is-mount-root';
+    public const IS_FEDERATED_PROPERTYNAME = '{http://nextcloud.org/ns}is-federated';
+    public const METADATA_ETAG_PROPERTYNAME = '{http://nextcloud.org/ns}metadata_etag';
+    public const UPLOAD_TIME_PROPERTYNAME = '{http://nextcloud.org/ns}upload_time';
+    public const CREATION_TIME_PROPERTYNAME = '{http://nextcloud.org/ns}creation_time';
+    public const SHARE_NOTE = '{http://nextcloud.org/ns}note';
+    public const SHARE_HIDE_DOWNLOAD_PROPERTYNAME = '{http://nextcloud.org/ns}hide-download';
+    public const SUBFOLDER_COUNT_PROPERTYNAME = '{http://nextcloud.org/ns}contained-folder-count';
+    public const SUBFILE_COUNT_PROPERTYNAME = '{http://nextcloud.org/ns}contained-file-count';
+    public const FILE_METADATA_PREFIX = '{http://nextcloud.org/ns}metadata-';
+    public const HIDDEN_PROPERTYNAME = '{http://nextcloud.org/ns}hidden';
+
+    /** Reference to main server object */
+    private ?Server $server = null;
+
+    /**
+     * @param Tree $tree
+     * @param IConfig $config
+     * @param IRequest $request
+     * @param IPreview $previewManager
+     * @param IUserSession $userSession
+     * @param bool $isPublic Whether this is public WebDAV. If true, some returned information will be stripped off.
+     * @param bool $downloadAttachment
+     * @return void
+     */
+    public function __construct(
+        private Tree $tree,
+        private IConfig $config,
+        private IRequest $request,
+        private IPreview $previewManager,
+        private IUserSession $userSession,
+        private IFilenameValidator $validator,
+        private IAccountManager $accountManager,
+        private bool $isPublic = false,
+        private bool $downloadAttachment = true,
+    ) {
+    }
+
+    /**
+     * This initializes the plugin.
+     *
+     * This function is called by \Sabre\DAV\Server, after
+     * addPlugin is called.
+     *
+     * This method should set up the required event subscriptions.
+     *
+     * @return void
+     */
+    public function initialize(Server $server) {
+        $server->xml->namespaceMap[self::NS_OWNCLOUD] = 'oc';
+        $server->xml->namespaceMap[self::NS_NEXTCLOUD] = 'nc';
+        $server->protectedProperties[] = self::FILEID_PROPERTYNAME;
+        $server->protectedProperties[] = self::INTERNAL_FILEID_PROPERTYNAME;
+        $server->protectedProperties[] = self::PERMISSIONS_PROPERTYNAME;
+        $server->protectedProperties[] = self::SHARE_PERMISSIONS_PROPERTYNAME;
+        $server->protectedProperties[] = self::OCM_SHARE_PERMISSIONS_PROPERTYNAME;
+        $server->protectedProperties[] = self::SHARE_ATTRIBUTES_PROPERTYNAME;
+        $server->protectedProperties[] = self::SIZE_PROPERTYNAME;
+        $server->protectedProperties[] = self::DOWNLOADURL_PROPERTYNAME;
+        $server->protectedProperties[] = self::OWNER_ID_PROPERTYNAME;
+        $server->protectedProperties[] = self::OWNER_DISPLAY_NAME_PROPERTYNAME;
+        $server->protectedProperties[] = self::CHECKSUMS_PROPERTYNAME;
+        $server->protectedProperties[] = self::DATA_FINGERPRINT_PROPERTYNAME;
+        $server->protectedProperties[] = self::HAS_PREVIEW_PROPERTYNAME;
+        $server->protectedProperties[] = self::MOUNT_TYPE_PROPERTYNAME;
+        $server->protectedProperties[] = self::IS_FEDERATED_PROPERTYNAME;
+        $server->protectedProperties[] = self::SHARE_NOTE;
+
+        // normally these cannot be changed (RFC4918), but we want them modifiable through PROPPATCH
+        $allowedProperties = ['{DAV:}getetag'];
+        $server->protectedProperties = array_diff($server->protectedProperties, $allowedProperties);
+
+        $this->server = $server;
+        $this->server->on('propFind', [$this, 'handleGetProperties']);
+        $this->server->on('propPatch', [$this, 'handleUpdateProperties']);
+        $this->server->on('afterBind', [$this, 'sendFileIdHeader']);
+        $this->server->on('afterWriteContent', [$this, 'sendFileIdHeader']);
+        $this->server->on('afterMethod:GET', [$this,'httpGet']);
+        $this->server->on('afterMethod:GET', [$this, 'handleDownloadToken']);
+        $this->server->on('afterResponse', function ($request, ResponseInterface $response): void {
+            $body = $response->getBody();
+            if (is_resource($body)) {
+                fclose($body);
+            }
+        });
+        $this->server->on('beforeMove', [$this, 'checkMove']);
+        $this->server->on('beforeCopy', [$this, 'checkCopy']);
+    }
+
+    /**
+     * Plugin that checks if a copy can actually be performed.
+     *
+     * @param string $source source path
+     * @param string $target target path
+     * @throws NotFound If the source does not exist
+     * @throws InvalidPath If the target is invalid
+     */
+    public function checkCopy($source, $target): void {
+        $sourceNode = $this->tree->getNodeForPath($source);
+        if (!$sourceNode instanceof Node) {
+            return;
+        }
+
+        // Ensure source exists
+        $sourceNodeFileInfo = $sourceNode->getFileInfo();
+        if ($sourceNodeFileInfo === null) {
+            throw new NotFound($source . ' does not exist');
+        }
+        // Ensure the target name is valid
+        try {
+            [$targetPath, $targetName] = \Sabre\Uri\split($target);
+            $this->validator->validateFilename($targetName);
+        } catch (InvalidPathException $e) {
+            throw new InvalidPath($e->getMessage(), false);
+        }
+        // Ensure the target path is valid
+        $segments = array_slice(explode('/', $targetPath), 2);
+        foreach ($segments as $segment) {
+            if ($this->validator->isFilenameValid($segment) === false) {
+                $l = \OCP\Server::get(IFactory::class)->get('dav');
+                throw new InvalidPath($l->t('Invalid target path'));
+            }
+        }
+    }
+
+    /**
+     * Plugin that checks if a move can actually be performed.
+     *
+     * @param string $source source path
+     * @param string $target target path
+     * @throws Forbidden If the source is not deletable
+     * @throws NotFound If the source does not exist
+     * @throws InvalidPath If the target name is invalid
+     */
+    public function checkMove(string $source, string $target): void {
+        $sourceNode = $this->tree->getNodeForPath($source);
+        if (!$sourceNode instanceof Node) {
+            return;
+        }
+
+        // First check copyable (move only needs additional delete permission)
+        $this->checkCopy($source, $target);
+
+        // The source needs to be deletable for moving
+        $sourceNodeFileInfo = $sourceNode->getFileInfo();
+        if (!$sourceNodeFileInfo->isDeletable()) {
+            throw new Forbidden($source . ' cannot be deleted');
+        }
+
+        // The source is not allowed to be the parent of the target
+        if (str_starts_with($source, $target . '/')) {
+            throw new Forbidden($source . ' cannot be moved to it\'s parent');
+        }
+    }
+
+    /**
+     * This sets a cookie to be able to recognize the start of the download
+     * the content must not be longer than 32 characters and must only contain
+     * alphanumeric characters
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     */
+    public function handleDownloadToken(RequestInterface $request, ResponseInterface $response) {
+        $queryParams = $request->getQueryParameters();
+
+        /**
+         * this sets a cookie to be able to recognize the start of the download
+         * the content must not be longer than 32 characters and must only contain
+         * alphanumeric characters
+         */
+        if (isset($queryParams['downloadStartSecret'])) {
+            $token = $queryParams['downloadStartSecret'];
+            if (!isset($token[32])
+                && preg_match('!^[a-zA-Z0-9]+$!', $token) === 1) {
+                // FIXME: use $response->setHeader() instead
+                setcookie('ocDownloadStarted', $token, time() + 20, '/');
+            }
+        }
+    }
+
+    /**
+     * Add headers to file download
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     */
+    public function httpGet(RequestInterface $request, ResponseInterface $response) {
+        // Only handle valid files
+        $node = $this->tree->getNodeForPath($request->getPath());
+        if (!($node instanceof IFile)) {
+            return;
+        }
+
+        // adds a 'Content-Disposition: attachment' header in case no disposition
+        // header has been set before
+        if ($this->downloadAttachment
+            && $response->getHeader('Content-Disposition') === null) {
+            $filename = $node->getName();
+            if ($this->request->isUserAgent(
+                [
+                    Request::USER_AGENT_IE,
+                    Request::USER_AGENT_ANDROID_MOBILE_CHROME,
+                    Request::USER_AGENT_FREEBOX,
+                ])) {
+                $response->addHeader('Content-Disposition', 'attachment; filename="' . rawurlencode($filename) . '"');
+            } else {
+                $response->addHeader('Content-Disposition', 'attachment; filename*=UTF-8\'\'' . rawurlencode($filename)
+                                                        . '; filename="' . rawurlencode($filename) . '"');
+            }
+        }
+
+        if ($node instanceof File) {
+            //Add OC-Checksum header
+            $checksum = $node->getChecksum();
+            if ($checksum !== null && $checksum !== '') {
+                $response->addHeader('OC-Checksum', $checksum);
+            }
+        }
+        $response->addHeader('X-Accel-Buffering', 'no');
+    }
+
+    /**
+     * Adds all ownCloud-specific properties
+     *
+     * @param PropFind $propFind
+     * @param \Sabre\DAV\INode $node
+     * @return void
+     */
+    public function handleGetProperties(PropFind $propFind, \Sabre\DAV\INode $node) {
+        $httpRequest = $this->server->httpRequest;
+
+        if ($node instanceof Node) {
+            /**
+             * This was disabled, because it made dir listing throw an exception,
+             * so users were unable to navigate into folders where one subitem
+             * is blocked by the files_accesscontrol app, see:
+             * https://github.com/nextcloud/files_accesscontrol/issues/65
+             * if (!$node->getFileInfo()->isReadable()) {
+             *     // avoid detecting files through this means
+             *     throw new NotFound();
+             * }
+             */
+
+            $propFind->handle(self::FILEID_PROPERTYNAME, function () use ($node) {
+                return $node->getFileId();
+            });
+
+            $propFind->handle(self::INTERNAL_FILEID_PROPERTYNAME, function () use ($node) {
+                return $node->getInternalFileId();
+            });
+
+            $propFind->handle(self::PERMISSIONS_PROPERTYNAME, function () use ($node) {
+                $perms = $node->getDavPermissions();
+                if ($this->isPublic) {
+                    // remove mount information
+                    $perms = str_replace(['S', 'M'], '', $perms);
+                }
+                return $perms;
+            });
+
+            $propFind->handle(self::SHARE_PERMISSIONS_PROPERTYNAME, function () use ($node, $httpRequest) {
+                $user = $this->userSession->getUser();
+                if ($user === null) {
+                    return null;
+                }
+                return $node->getSharePermissions(
+                    $user->getUID()
+                );
+            });
+
+            $propFind->handle(self::OCM_SHARE_PERMISSIONS_PROPERTYNAME, function () use ($node, $httpRequest): ?string {
+                $user = $this->userSession->getUser();
+                if ($user === null) {
+                    return null;
+                }
+                $ncPermissions = $node->getSharePermissions(
+                    $user->getUID()
+                );
+                $ocmPermissions = $this->ncPermissions2ocmPermissions($ncPermissions);
+                return json_encode($ocmPermissions, JSON_THROW_ON_ERROR);
+            });
+
+            $propFind->handle(self::SHARE_ATTRIBUTES_PROPERTYNAME, function () use ($node, $httpRequest) {
+                return json_encode($node->getShareAttributes(), JSON_THROW_ON_ERROR);
+            });
+
+            $propFind->handle(self::GETETAG_PROPERTYNAME, function () use ($node): string {
+                return $node->getETag();
+            });
+
+            $propFind->handle(self::OWNER_ID_PROPERTYNAME, function () use ($node): ?string {
+                $owner = $node->getOwner();
+                if (!$owner) {
+                    return null;
+                } else {
+                    return $owner->getUID();
+                }
+            });
+            $propFind->handle(self::OWNER_DISPLAY_NAME_PROPERTYNAME, function () use ($node): ?string {
+                $owner = $node->getOwner();
+                if (!$owner) {
+                    return null;
+                }
+
+                // Get current user to see if we're in a public share or not
+                $user = $this->userSession->getUser();
+
+                // If the user is logged in, we can return the display name
+                if ($user !== null) {
+                    return $owner->getDisplayName();
+                }
+
+                // Check if the user published their display name
+                try {
+                    $ownerAccount = $this->accountManager->getAccount($owner);
+                } catch (NoUserException) {
+                    // do not lock process if owner is not local
+                    return null;
+                }
+
+                $ownerNameProperty = $ownerAccount->getProperty(IAccountManager::PROPERTY_DISPLAYNAME);
+
+                // Since we are not logged in, we need to have at least the published scope
+                if ($ownerNameProperty->getScope() === IAccountManager::SCOPE_PUBLISHED) {
+                    return $owner->getDisplayName();
+                }
+
+                return null;
+            });
+
+            $propFind->handle(self::HAS_PREVIEW_PROPERTYNAME, function () use ($node) {
+                return json_encode($this->previewManager->isAvailable($node->getFileInfo()), JSON_THROW_ON_ERROR);
+            });
+            $propFind->handle(self::SIZE_PROPERTYNAME, function () use ($node): int|float {
+                return $node->getSize();
+            });
+            $propFind->handle(self::MOUNT_TYPE_PROPERTYNAME, function () use ($node) {
+                return $node->getFileInfo()->getMountPoint()->getMountType();
+            });
+
+            /**
+             * This is a special property which is used to determine if a node
+             * is a mount root or not, e.g. a shared folder.
+             * If so, then the node can only be unshared and not deleted.
+             * @see https://github.com/nextcloud/server/blob/cc75294eb6b16b916a342e69998935f89222619d/lib/private/Files/View.php#L696-L698
+             */
+            $propFind->handle(self::MOUNT_ROOT_PROPERTYNAME, function () use ($node) {
+                return $node->getNode()->getInternalPath() === '' ? 'true' : 'false';
+            });
+
+            $propFind->handle(self::SHARE_NOTE, function () use ($node): ?string {
+                $user = $this->userSession->getUser();
+                return $node->getNoteFromShare(
+                    $user?->getUID()
+                );
+            });
+
+            $propFind->handle(self::SHARE_HIDE_DOWNLOAD_PROPERTYNAME, function () use ($node) {
+                $storage = $node->getNode()->getStorage();
+                if ($storage->instanceOfStorage(ISharedStorage::class)) {
+                    /** @var ISharedStorage $storage */
+                    return match($storage->getShare()->getHideDownload()) {
+                        true => 'true',
+                        false => 'false',
+                    };
+                } else {
+                    return null;
+                }
+            });
+
+            $propFind->handle(self::DATA_FINGERPRINT_PROPERTYNAME, function () {
+                return $this->config->getSystemValue('data-fingerprint', '');
+            });
+            $propFind->handle(self::CREATIONDATE_PROPERTYNAME, function () use ($node) {
+                return (new \DateTimeImmutable())
+                    ->setTimestamp($node->getFileInfo()->getCreationTime())
+                    ->format(\DateTimeInterface::ATOM);
+            });
+            $propFind->handle(self::CREATION_TIME_PROPERTYNAME, function () use ($node) {
+                return $node->getFileInfo()->getCreationTime();
+            });
+
+            foreach ($node->getFileInfo()->getMetadata() as $metadataKey => $metadataValue) {
+                $propFind->handle(self::FILE_METADATA_PREFIX . $metadataKey, $metadataValue);
+            }
+
+            $propFind->handle(self::HIDDEN_PROPERTYNAME, function () use ($node) {
+                $isLivePhoto = isset($node->getFileInfo()->getMetadata()['files-live-photo']);
+                $isMovFile = $node->getFileInfo()->getMimetype() === 'video/quicktime';
+                return ($isLivePhoto && $isMovFile) ? 'true' : 'false';
+            });
+
+            /**
+             * Return file/folder name as displayname. The primary reason to
+             * implement it this way is to avoid costly fallback to
+             * CustomPropertiesBackend (esp. visible when querying all files
+             * in a folder).
+             */
+            $propFind->handle(self::DISPLAYNAME_PROPERTYNAME, function () use ($node) {
+                return $node->getName();
+            });
+
+            $propFind->handle(self::IS_FEDERATED_PROPERTYNAME, function () use ($node) {
+                return $node->getFileInfo()->getMountPoint()
+                    instanceof SharingExternalMount;
+            });
+        }
+
+        if ($node instanceof File) {
+            $propFind->handle(self::DOWNLOADURL_PROPERTYNAME, function () use ($node) {
+                try {
+                    $directDownloadUrl = $node->getDirectDownload();
+                    if (isset($directDownloadUrl['url'])) {
+                        return $directDownloadUrl['url'];
+                    }
+                } catch (StorageNotAvailableException $e) {
+                    return false;
+                } catch (ForbiddenException $e) {
+                    return false;
+                }
+                return false;
+            });
+
+            $propFind->handle(self::CHECKSUMS_PROPERTYNAME, function () use ($node) {
+                $checksum = $node->getChecksum();
+                if ($checksum === null || $checksum === '') {
+                    return null;
+                }
+
+                return new ChecksumList($checksum);
+            });
+
+            $propFind->handle(self::UPLOAD_TIME_PROPERTYNAME, function () use ($node) {
+                return $node->getFileInfo()->getUploadTime();
+            });
+        }
+
+        if ($node instanceof Directory) {
+            $propFind->handle(self::SIZE_PROPERTYNAME, function () use ($node) {
+                return $node->getSize();
+            });
+
+            $requestProperties = $propFind->getRequestedProperties();
+
+            if (in_array(self::SUBFILE_COUNT_PROPERTYNAME, $requestProperties, true)
+                || in_array(self::SUBFOLDER_COUNT_PROPERTYNAME, $requestProperties, true)) {
+                $nbFiles = 0;
+                $nbFolders = 0;
+                foreach ($node->getChildren() as $child) {
+                    if ($child instanceof File) {
+                        $nbFiles++;
+                    } elseif ($child instanceof Directory) {
+                        $nbFolders++;
+                    }
+                }
+
+                $propFind->handle(self::SUBFILE_COUNT_PROPERTYNAME, $nbFiles);
+                $propFind->handle(self::SUBFOLDER_COUNT_PROPERTYNAME, $nbFolders);
+            }
+        }
+    }
+
+    /**
+     * translate Nextcloud permissions to OCM Permissions
+     *
+     * @param $ncPermissions
+     * @return array
+     */
+    protected function ncPermissions2ocmPermissions($ncPermissions) {
+        $ocmPermissions = [];
+
+        if ($ncPermissions & Constants::PERMISSION_SHARE) {
+            $ocmPermissions[] = 'share';
+        }
+
+        if ($ncPermissions & Constants::PERMISSION_READ) {
+            $ocmPermissions[] = 'read';
+        }
+
+        if (($ncPermissions & Constants::PERMISSION_CREATE)
+            || ($ncPermissions & Constants::PERMISSION_UPDATE)) {
+            $ocmPermissions[] = 'write';
+        }
+
+        return $ocmPermissions;
+    }
+
+    /**
+     * Update ownCloud-specific properties
+     *
+     * @param string $path
+     * @param PropPatch $propPatch
+     *
+     * @return void
+     */
+    public function handleUpdateProperties($path, PropPatch $propPatch) {
+        $node = $this->tree->getNodeForPath($path);
+        if (!($node instanceof Node)) {
+            return;
+        }
+
+        $propPatch->handle(self::LASTMODIFIED_PROPERTYNAME, function ($time) use ($node) {
+            if (empty($time)) {
+                return false;
+            }
+            $node->touch($time);
+            return true;
+        });
+        $propPatch->handle(self::GETETAG_PROPERTYNAME, function ($etag) use ($node) {
+            if (empty($etag)) {
+                return false;
+            }
+            return $node->setEtag($etag) !== -1;
+        });
+        $propPatch->handle(self::CREATIONDATE_PROPERTYNAME, function ($time) use ($node) {
+            if (empty($time)) {
+                return false;
+            }
+            $dateTime = new \DateTimeImmutable($time);
+            $node->setCreationTime($dateTime->getTimestamp());
+            return true;
+        });
+        $propPatch->handle(self::CREATION_TIME_PROPERTYNAME, function ($time) use ($node) {
+            if (empty($time)) {
+                return false;
+            }
+            $node->setCreationTime((int)$time);
+            return true;
+        });
+
+        $this->handleUpdatePropertiesMetadata($propPatch, $node);
+
+        /**
+         * Disable modification of the displayname property for files and
+         * folders via PROPPATCH. See PROPFIND for more information.
+         */
+        $propPatch->handle(self::DISPLAYNAME_PROPERTYNAME, function ($displayName) {
+            return 403;
+        });
+    }
+
+
+    /**
+     * handle the update of metadata from PROPPATCH requests
+     *
+     * @param PropPatch $propPatch
+     * @param Node $node
+     *
+     * @throws FilesMetadataException
+     */
+    private function handleUpdatePropertiesMetadata(PropPatch $propPatch, Node $node): void {
+        $userId = $this->userSession->getUser()?->getUID();
+        if ($userId === null) {
+            return;
+        }
+
+        $accessRight = $this->getMetadataFileAccessRight($node, $userId);
+        $filesMetadataManager = $this->initFilesMetadataManager();
+        $knownMetadata = $filesMetadataManager->getKnownMetadata();
+
+        foreach ($propPatch->getRemainingMutations() as $mutation) {
+            if (!str_starts_with($mutation, self::FILE_METADATA_PREFIX)) {
+                continue;
+            }
+
+            $propPatch->handle(
+                $mutation,
+                function (mixed $value) use ($accessRight, $knownMetadata, $node, $mutation, $filesMetadataManager): bool {
+                    /** @var FilesMetadata $metadata */
+                    $metadata = $filesMetadataManager->getMetadata((int)$node->getFileId(), true);
+                    $metadata->setStorageId($node->getNode()->getStorage()->getCache()->getNumericStorageId());
+                    $metadataKey = substr($mutation, strlen(self::FILE_METADATA_PREFIX));
+
+                    // confirm metadata key is editable via PROPPATCH
+                    if ($knownMetadata->getEditPermission($metadataKey) < $accessRight) {
+                        throw new FilesMetadataException('you do not have enough rights to update \'' . $metadataKey . '\' on this node');
+                    }
+
+                    if ($value === null) {
+                        $metadata->unset($metadataKey);
+                        $filesMetadataManager->saveMetadata($metadata);
+                        return true;
+                    }
+
+                    // If the metadata is unknown, it defaults to string.
+                    try {
+                        $type = $knownMetadata->getType($metadataKey);
+                    } catch (FilesMetadataNotFoundException) {
+                        $type = IMetadataValueWrapper::TYPE_STRING;
+                    }
+
+                    switch ($type) {
+                        case IMetadataValueWrapper::TYPE_STRING:
+                            $metadata->setString($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
+                            break;
+                        case IMetadataValueWrapper::TYPE_INT:
+                            $metadata->setInt($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
+                            break;
+                        case IMetadataValueWrapper::TYPE_FLOAT:
+                            $metadata->setFloat($metadataKey, $value);
+                            break;
+                        case IMetadataValueWrapper::TYPE_BOOL:
+                            $metadata->setBool($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
+                            break;
+                        case IMetadataValueWrapper::TYPE_ARRAY:
+                            $metadata->setArray($metadataKey, $value);
+                            break;
+                        case IMetadataValueWrapper::TYPE_STRING_LIST:
+                            $metadata->setStringList($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
+                            break;
+                        case IMetadataValueWrapper::TYPE_INT_LIST:
+                            $metadata->setIntList($metadataKey, $value, $knownMetadata->isIndex($metadataKey));
+                            break;
+                    }
+
+                    $filesMetadataManager->saveMetadata($metadata);
+
+                    return true;
+                }
+            );
+        }
+    }
+
+    /**
+     * init default internal metadata
+     *
+     * @return IFilesMetadataManager
+     */
+    private function initFilesMetadataManager(): IFilesMetadataManager {
+        /** @var IFilesMetadataManager $manager */
+        $manager = \OCP\Server::get(IFilesMetadataManager::class);
+        $manager->initMetadata('files-live-photo', IMetadataValueWrapper::TYPE_STRING, false, IMetadataValueWrapper::EDIT_REQ_WRITE_PERMISSION);
+
+        return $manager;
+    }
+
+    /**
+     * based on owner and shares, returns the bottom limit to update related metadata
+     *
+     * @param Node $node
+     * @param string $userId
+     *
+     * @return int
+     */
+    private function getMetadataFileAccessRight(Node $node, string $userId): int {
+        if ($node->getOwner()?->getUID() === $userId) {
+            return IMetadataValueWrapper::EDIT_REQ_OWNERSHIP;
+        } else {
+            $filePermissions = $node->getSharePermissions($userId);
+            if ($filePermissions & Constants::PERMISSION_UPDATE) {
+                return IMetadataValueWrapper::EDIT_REQ_WRITE_PERMISSION;
+            }
+        }
+
+        return IMetadataValueWrapper::EDIT_REQ_READ_PERMISSION;
+    }
+
+    /**
+     * @param string $filePath
+     * @param ?\Sabre\DAV\INode $node
+     * @return void
+     * @throws \Sabre\DAV\Exception\BadRequest
+     */
+    public function sendFileIdHeader($filePath, ?\Sabre\DAV\INode $node = null) {
+        // we get the node for the given $filePath here because in case of afterCreateFile $node is the parent folder
+        try {
+            $node = $this->server->tree->getNodeForPath($filePath);
+            if ($node instanceof Node) {
+                $fileId = $node->getFileId();
+                if (!is_null($fileId)) {
+                    $this->server->httpResponse->setHeader('OC-FileId', $fileId);
+                }
+            }
+        } catch (NotFound) {
+        }
+    }
 }