nextcloud / server

lib/public/Files.php

Indentation +110 added lines, -110 removed lines

@@ -18,123 +18,123 @@
  * @deprecated 14.0.0
  */
 class Files {
-	/**
-	 * Recursive deletion of folders
-	 *
-	 * @param string $dir path to the folder
-	 * @param bool $deleteSelf if set to false only the content of the folder will be deleted
-	 * @return bool
-	 * @since 5.0.0
-	 * @since 32.0.0 added the $deleteSelf parameter
-	 * @deprecated 14.0.0
-	 */
-	public static function rmdirr($dir, bool $deleteSelf = true) {
-		if (is_dir($dir)) {
-			$files = new \RecursiveIteratorIterator(
-				new \RecursiveDirectoryIterator($dir, \RecursiveDirectoryIterator::SKIP_DOTS),
-				\RecursiveIteratorIterator::CHILD_FIRST
-			);
+    /**
+     * Recursive deletion of folders
+     *
+     * @param string $dir path to the folder
+     * @param bool $deleteSelf if set to false only the content of the folder will be deleted
+     * @return bool
+     * @since 5.0.0
+     * @since 32.0.0 added the $deleteSelf parameter
+     * @deprecated 14.0.0
+     */
+    public static function rmdirr($dir, bool $deleteSelf = true) {
+        if (is_dir($dir)) {
+            $files = new \RecursiveIteratorIterator(
+                new \RecursiveDirectoryIterator($dir, \RecursiveDirectoryIterator::SKIP_DOTS),
+                \RecursiveIteratorIterator::CHILD_FIRST
+            );
 
-			foreach ($files as $fileInfo) {
-				/** @var \SplFileInfo $fileInfo */
-				if ($fileInfo->isLink()) {
-					unlink($fileInfo->getPathname());
-				} elseif ($fileInfo->isDir()) {
-					rmdir($fileInfo->getRealPath());
-				} else {
-					unlink($fileInfo->getRealPath());
-				}
-			}
-			if ($deleteSelf) {
-				rmdir($dir);
-			}
-		} elseif (file_exists($dir)) {
-			if ($deleteSelf) {
-				unlink($dir);
-			}
-		}
-		if (!$deleteSelf) {
-			return true;
-		}
+            foreach ($files as $fileInfo) {
+                /** @var \SplFileInfo $fileInfo */
+                if ($fileInfo->isLink()) {
+                    unlink($fileInfo->getPathname());
+                } elseif ($fileInfo->isDir()) {
+                    rmdir($fileInfo->getRealPath());
+                } else {
+                    unlink($fileInfo->getRealPath());
+                }
+            }
+            if ($deleteSelf) {
+                rmdir($dir);
+            }
+        } elseif (file_exists($dir)) {
+            if ($deleteSelf) {
+                unlink($dir);
+            }
+        }
+        if (!$deleteSelf) {
+            return true;
+        }
 
-		return !file_exists($dir);
-	}
+        return !file_exists($dir);
+    }
 
-	/**
-	 * Get the mimetype form a local file
-	 * @param string $path
-	 * @return string
-	 *                does NOT work for ownClouds filesystem, use OC_FileSystem::getMimeType instead
-	 * @since 5.0.0
-	 * @deprecated 14.0.0
-	 */
-	public static function getMimeType($path) {
-		return Server::get(IMimeTypeDetector::class)->detect($path);
-	}
+    /**
+     * Get the mimetype form a local file
+     * @param string $path
+     * @return string
+     *                does NOT work for ownClouds filesystem, use OC_FileSystem::getMimeType instead
+     * @since 5.0.0
+     * @deprecated 14.0.0
+     */
+    public static function getMimeType($path) {
+        return Server::get(IMimeTypeDetector::class)->detect($path);
+    }
 
-	/**
-	 * Search for files by mimetype
-	 * @param string $mimetype
-	 * @return array
-	 * @since 6.0.0
-	 * @deprecated 14.0.0
-	 */
-	public static function searchByMime($mimetype) {
-		return \OC\Files\Filesystem::searchByMime($mimetype);
-	}
+    /**
+     * Search for files by mimetype
+     * @param string $mimetype
+     * @return array
+     * @since 6.0.0
+     * @deprecated 14.0.0
+     */
+    public static function searchByMime($mimetype) {
+        return \OC\Files\Filesystem::searchByMime($mimetype);
+    }
 
-	/**
-	 * Copy the contents of one stream to another
-	 *
-	 * @template T of null|true
-	 * @param resource $source
-	 * @param resource $target
-	 * @param T $includeResult
-	 * @return int|array
-	 * @psalm-return (T is true ? array{0: int, 1: bool} : int)
-	 * @since 5.0.0
-	 * @since 32.0.0 added $includeResult parameter
-	 * @deprecated 14.0.0
-	 */
-	public static function streamCopy($source, $target, ?bool $includeResult = null) {
-		if (!$source or !$target) {
-			return $includeResult ? [0, false] : 0;
-		}
+    /**
+     * Copy the contents of one stream to another
+     *
+     * @template T of null|true
+     * @param resource $source
+     * @param resource $target
+     * @param T $includeResult
+     * @return int|array
+     * @psalm-return (T is true ? array{0: int, 1: bool} : int)
+     * @since 5.0.0
+     * @since 32.0.0 added $includeResult parameter
+     * @deprecated 14.0.0
+     */
+    public static function streamCopy($source, $target, ?bool $includeResult = null) {
+        if (!$source or !$target) {
+            return $includeResult ? [0, false] : 0;
+        }
 
-		$bufSize = 8192;
-		$count = 0;
-		$result = true;
-		while (!feof($source)) {
-			$buf = fread($source, $bufSize);
-			if ($buf === false) {
-				$result = false;
-				break;
-			}
+        $bufSize = 8192;
+        $count = 0;
+        $result = true;
+        while (!feof($source)) {
+            $buf = fread($source, $bufSize);
+            if ($buf === false) {
+                $result = false;
+                break;
+            }
 
-			$bytesWritten = fwrite($target, $buf);
-			if ($bytesWritten !== false) {
-				$count += $bytesWritten;
-			}
+            $bytesWritten = fwrite($target, $buf);
+            if ($bytesWritten !== false) {
+                $count += $bytesWritten;
+            }
 
-			if ($bytesWritten === false
-				|| ($bytesWritten < $bufSize && $bytesWritten < strlen($buf))
-			) {
-				$result = false;
-				break;
-			}
-		}
-		return $includeResult ? [$count, $result] : $count;
-	}
+            if ($bytesWritten === false
+                || ($bytesWritten < $bufSize && $bytesWritten < strlen($buf))
+            ) {
+                $result = false;
+                break;
+            }
+        }
+        return $includeResult ? [$count, $result] : $count;
+    }
 
-	/**
-	 * Adds a suffix to the name in case the file exists
-	 * @param string $path
-	 * @param string $filename
-	 * @return string
-	 * @since 5.0.0
-	 * @deprecated 14.0.0 use getNonExistingName of the OCP\Files\Folder object
-	 */
-	public static function buildNotExistingFileName($path, $filename) {
-		return \OC_Helper::buildNotExistingFileName($path, $filename);
-	}
+    /**
+     * Adds a suffix to the name in case the file exists
+     * @param string $path
+     * @param string $filename
+     * @return string
+     * @since 5.0.0
+     * @deprecated 14.0.0 use getNonExistingName of the OCP\Files\Folder object
+     */
+    public static function buildNotExistingFileName($path, $filename) {
+        return \OC_Helper::buildNotExistingFileName($path, $filename);
+    }
 }

lib/private/Files/Storage/Wrapper/Wrapper.php

Indentation +325 added lines, -325 removed lines

@@ -23,329 +23,329 @@
 use Psr\Log\LoggerInterface;
 
 class Wrapper implements \OC\Files\Storage\Storage, ILockingStorage, IWriteStreamStorage {
-	/**
-	 * @var \OC\Files\Storage\Storage $storage
-	 */
-	protected $storage;
-
-	public $cache;
-	public $scanner;
-	public $watcher;
-	public $propagator;
-	public $updater;
-
-	/**
-	 * @param array $parameters
-	 */
-	public function __construct(array $parameters) {
-		$this->storage = $parameters['storage'];
-	}
-
-	public function getWrapperStorage(): Storage {
-		if (!$this->storage) {
-			$message = 'storage wrapper ' . get_class($this) . " doesn't have a wrapped storage set";
-			$logger = Server::get(LoggerInterface::class);
-			$logger->error($message);
-			$this->storage = new FailedStorage(['exception' => new \Exception($message)]);
-		}
-		return $this->storage;
-	}
-
-	public function getId(): string {
-		return $this->getWrapperStorage()->getId();
-	}
-
-	public function mkdir(string $path): bool {
-		return $this->getWrapperStorage()->mkdir($path);
-	}
-
-	public function rmdir(string $path): bool {
-		return $this->getWrapperStorage()->rmdir($path);
-	}
-
-	public function opendir(string $path) {
-		return $this->getWrapperStorage()->opendir($path);
-	}
-
-	public function is_dir(string $path): bool {
-		return $this->getWrapperStorage()->is_dir($path);
-	}
-
-	public function is_file(string $path): bool {
-		return $this->getWrapperStorage()->is_file($path);
-	}
-
-	public function stat(string $path): array|false {
-		return $this->getWrapperStorage()->stat($path);
-	}
-
-	public function filetype(string $path): string|false {
-		return $this->getWrapperStorage()->filetype($path);
-	}
-
-	public function filesize(string $path): int|float|false {
-		return $this->getWrapperStorage()->filesize($path);
-	}
-
-	public function isCreatable(string $path): bool {
-		return $this->getWrapperStorage()->isCreatable($path);
-	}
-
-	public function isReadable(string $path): bool {
-		return $this->getWrapperStorage()->isReadable($path);
-	}
-
-	public function isUpdatable(string $path): bool {
-		return $this->getWrapperStorage()->isUpdatable($path);
-	}
-
-	public function isDeletable(string $path): bool {
-		return $this->getWrapperStorage()->isDeletable($path);
-	}
-
-	public function isSharable(string $path): bool {
-		return $this->getWrapperStorage()->isSharable($path);
-	}
-
-	public function getPermissions(string $path): int {
-		return $this->getWrapperStorage()->getPermissions($path);
-	}
-
-	public function file_exists(string $path): bool {
-		return $this->getWrapperStorage()->file_exists($path);
-	}
-
-	public function filemtime(string $path): int|false {
-		return $this->getWrapperStorage()->filemtime($path);
-	}
-
-	public function file_get_contents(string $path): string|false {
-		return $this->getWrapperStorage()->file_get_contents($path);
-	}
-
-	public function file_put_contents(string $path, mixed $data): int|float|false {
-		return $this->getWrapperStorage()->file_put_contents($path, $data);
-	}
-
-	public function unlink(string $path): bool {
-		return $this->getWrapperStorage()->unlink($path);
-	}
-
-	public function rename(string $source, string $target): bool {
-		return $this->getWrapperStorage()->rename($source, $target);
-	}
-
-	public function copy(string $source, string $target): bool {
-		return $this->getWrapperStorage()->copy($source, $target);
-	}
-
-	public function fopen(string $path, string $mode) {
-		return $this->getWrapperStorage()->fopen($path, $mode);
-	}
-
-	public function getMimeType(string $path): string|false {
-		return $this->getWrapperStorage()->getMimeType($path);
-	}
-
-	public function hash(string $type, string $path, bool $raw = false): string|false {
-		return $this->getWrapperStorage()->hash($type, $path, $raw);
-	}
-
-	public function free_space(string $path): int|float|false {
-		return $this->getWrapperStorage()->free_space($path);
-	}
-
-	public function touch(string $path, ?int $mtime = null): bool {
-		return $this->getWrapperStorage()->touch($path, $mtime);
-	}
-
-	public function getLocalFile(string $path): string|false {
-		return $this->getWrapperStorage()->getLocalFile($path);
-	}
-
-	public function hasUpdated(string $path, int $time): bool {
-		return $this->getWrapperStorage()->hasUpdated($path, $time);
-	}
-
-	public function getCache(string $path = '', ?IStorage $storage = null): ICache {
-		if (!$storage) {
-			$storage = $this;
-		}
-		return $this->getWrapperStorage()->getCache($path, $storage);
-	}
-
-	public function getScanner(string $path = '', ?IStorage $storage = null): IScanner {
-		if (!$storage) {
-			$storage = $this;
-		}
-		return $this->getWrapperStorage()->getScanner($path, $storage);
-	}
-
-	public function getOwner(string $path): string|false {
-		return $this->getWrapperStorage()->getOwner($path);
-	}
-
-	public function getWatcher(string $path = '', ?IStorage $storage = null): IWatcher {
-		if (!$storage) {
-			$storage = $this;
-		}
-		return $this->getWrapperStorage()->getWatcher($path, $storage);
-	}
-
-	public function getPropagator(?IStorage $storage = null): IPropagator {
-		if (!$storage) {
-			$storage = $this;
-		}
-		return $this->getWrapperStorage()->getPropagator($storage);
-	}
-
-	public function getUpdater(?IStorage $storage = null): IUpdater {
-		if (!$storage) {
-			$storage = $this;
-		}
-		return $this->getWrapperStorage()->getUpdater($storage);
-	}
-
-	public function getStorageCache(): \OC\Files\Cache\Storage {
-		return $this->getWrapperStorage()->getStorageCache();
-	}
-
-	public function getETag(string $path): string|false {
-		return $this->getWrapperStorage()->getETag($path);
-	}
-
-	public function test(): bool {
-		return $this->getWrapperStorage()->test();
-	}
-
-	public function isLocal(): bool {
-		return $this->getWrapperStorage()->isLocal();
-	}
-
-	public function instanceOfStorage(string $class): bool {
-		if (ltrim($class, '\\') === 'OC\Files\Storage\Shared') {
-			// FIXME Temporary fix to keep existing checks working
-			$class = '\OCA\Files_Sharing\SharedStorage';
-		}
-		return is_a($this, $class) or $this->getWrapperStorage()->instanceOfStorage($class);
-	}
-
-	/**
-	 * @psalm-template T of IStorage
-	 * @psalm-param class-string<T> $class
-	 * @psalm-return T|null
-	 */
-	public function getInstanceOfStorage(string $class): ?IStorage {
-		$storage = $this;
-		while ($storage instanceof Wrapper) {
-			if ($storage instanceof $class) {
-				break;
-			}
-			$storage = $storage->getWrapperStorage();
-		}
-		if (!($storage instanceof $class)) {
-			return null;
-		}
-		return $storage;
-	}
-
-	/**
-	 * Pass any methods custom to specific storage implementations to the wrapped storage
-	 *
-	 * @return mixed
-	 */
-	public function __call(string $method, array $args) {
-		return call_user_func_array([$this->getWrapperStorage(), $method], $args);
-	}
-
-	public function getDirectDownload(string $path): array|false {
-		return $this->getWrapperStorage()->getDirectDownload($path);
-	}
-
-	public function getAvailability(): array {
-		return $this->getWrapperStorage()->getAvailability();
-	}
-
-	public function setAvailability(bool $isAvailable): void {
-		$this->getWrapperStorage()->setAvailability($isAvailable);
-	}
-
-	public function verifyPath(string $path, string $fileName): void {
-		$this->getWrapperStorage()->verifyPath($path, $fileName);
-	}
-
-	public function copyFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
-		if ($sourceStorage === $this) {
-			return $this->copy($sourceInternalPath, $targetInternalPath);
-		}
-
-		return $this->getWrapperStorage()->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
-	}
-
-	public function moveFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
-		if ($sourceStorage === $this) {
-			return $this->rename($sourceInternalPath, $targetInternalPath);
-		}
-
-		return $this->getWrapperStorage()->moveFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
-	}
-
-	public function getMetaData(string $path): ?array {
-		return $this->getWrapperStorage()->getMetaData($path);
-	}
-
-	public function acquireLock(string $path, int $type, ILockingProvider $provider): void {
-		if ($this->getWrapperStorage()->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
-			$this->getWrapperStorage()->acquireLock($path, $type, $provider);
-		}
-	}
-
-	public function releaseLock(string $path, int $type, ILockingProvider $provider): void {
-		if ($this->getWrapperStorage()->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
-			$this->getWrapperStorage()->releaseLock($path, $type, $provider);
-		}
-	}
-
-	public function changeLock(string $path, int $type, ILockingProvider $provider): void {
-		if ($this->getWrapperStorage()->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
-			$this->getWrapperStorage()->changeLock($path, $type, $provider);
-		}
-	}
-
-	public function needsPartFile(): bool {
-		return $this->getWrapperStorage()->needsPartFile();
-	}
-
-	public function writeStream(string $path, $stream, ?int $size = null): int {
-		$storage = $this->getWrapperStorage();
-		if ($storage->instanceOfStorage(IWriteStreamStorage::class)) {
-			/** @var IWriteStreamStorage $storage */
-			return $storage->writeStream($path, $stream, $size);
-		} else {
-			$target = $this->fopen($path, 'w');
-			$count = Files::streamCopy($stream, $target);
-			fclose($stream);
-			fclose($target);
-			return $count;
-		}
-	}
-
-	public function getDirectoryContent(string $directory): \Traversable {
-		return $this->getWrapperStorage()->getDirectoryContent($directory);
-	}
-
-	public function isWrapperOf(IStorage $storage): bool {
-		$wrapped = $this->getWrapperStorage();
-		if ($wrapped === $storage) {
-			return true;
-		}
-		if ($wrapped instanceof Wrapper) {
-			return $wrapped->isWrapperOf($storage);
-		}
-		return false;
-	}
-
-	public function setOwner(?string $user): void {
-		$this->getWrapperStorage()->setOwner($user);
-	}
+    /**
+     * @var \OC\Files\Storage\Storage $storage
+     */
+    protected $storage;
+
+    public $cache;
+    public $scanner;
+    public $watcher;
+    public $propagator;
+    public $updater;
+
+    /**
+     * @param array $parameters
+     */
+    public function __construct(array $parameters) {
+        $this->storage = $parameters['storage'];
+    }
+
+    public function getWrapperStorage(): Storage {
+        if (!$this->storage) {
+            $message = 'storage wrapper ' . get_class($this) . " doesn't have a wrapped storage set";
+            $logger = Server::get(LoggerInterface::class);
+            $logger->error($message);
+            $this->storage = new FailedStorage(['exception' => new \Exception($message)]);
+        }
+        return $this->storage;
+    }
+
+    public function getId(): string {
+        return $this->getWrapperStorage()->getId();
+    }
+
+    public function mkdir(string $path): bool {
+        return $this->getWrapperStorage()->mkdir($path);
+    }
+
+    public function rmdir(string $path): bool {
+        return $this->getWrapperStorage()->rmdir($path);
+    }
+
+    public function opendir(string $path) {
+        return $this->getWrapperStorage()->opendir($path);
+    }
+
+    public function is_dir(string $path): bool {
+        return $this->getWrapperStorage()->is_dir($path);
+    }
+
+    public function is_file(string $path): bool {
+        return $this->getWrapperStorage()->is_file($path);
+    }
+
+    public function stat(string $path): array|false {
+        return $this->getWrapperStorage()->stat($path);
+    }
+
+    public function filetype(string $path): string|false {
+        return $this->getWrapperStorage()->filetype($path);
+    }
+
+    public function filesize(string $path): int|float|false {
+        return $this->getWrapperStorage()->filesize($path);
+    }
+
+    public function isCreatable(string $path): bool {
+        return $this->getWrapperStorage()->isCreatable($path);
+    }
+
+    public function isReadable(string $path): bool {
+        return $this->getWrapperStorage()->isReadable($path);
+    }
+
+    public function isUpdatable(string $path): bool {
+        return $this->getWrapperStorage()->isUpdatable($path);
+    }
+
+    public function isDeletable(string $path): bool {
+        return $this->getWrapperStorage()->isDeletable($path);
+    }
+
+    public function isSharable(string $path): bool {
+        return $this->getWrapperStorage()->isSharable($path);
+    }
+
+    public function getPermissions(string $path): int {
+        return $this->getWrapperStorage()->getPermissions($path);
+    }
+
+    public function file_exists(string $path): bool {
+        return $this->getWrapperStorage()->file_exists($path);
+    }
+
+    public function filemtime(string $path): int|false {
+        return $this->getWrapperStorage()->filemtime($path);
+    }
+
+    public function file_get_contents(string $path): string|false {
+        return $this->getWrapperStorage()->file_get_contents($path);
+    }
+
+    public function file_put_contents(string $path, mixed $data): int|float|false {
+        return $this->getWrapperStorage()->file_put_contents($path, $data);
+    }
+
+    public function unlink(string $path): bool {
+        return $this->getWrapperStorage()->unlink($path);
+    }
+
+    public function rename(string $source, string $target): bool {
+        return $this->getWrapperStorage()->rename($source, $target);
+    }
+
+    public function copy(string $source, string $target): bool {
+        return $this->getWrapperStorage()->copy($source, $target);
+    }
+
+    public function fopen(string $path, string $mode) {
+        return $this->getWrapperStorage()->fopen($path, $mode);
+    }
+
+    public function getMimeType(string $path): string|false {
+        return $this->getWrapperStorage()->getMimeType($path);
+    }
+
+    public function hash(string $type, string $path, bool $raw = false): string|false {
+        return $this->getWrapperStorage()->hash($type, $path, $raw);
+    }
+
+    public function free_space(string $path): int|float|false {
+        return $this->getWrapperStorage()->free_space($path);
+    }
+
+    public function touch(string $path, ?int $mtime = null): bool {
+        return $this->getWrapperStorage()->touch($path, $mtime);
+    }
+
+    public function getLocalFile(string $path): string|false {
+        return $this->getWrapperStorage()->getLocalFile($path);
+    }
+
+    public function hasUpdated(string $path, int $time): bool {
+        return $this->getWrapperStorage()->hasUpdated($path, $time);
+    }
+
+    public function getCache(string $path = '', ?IStorage $storage = null): ICache {
+        if (!$storage) {
+            $storage = $this;
+        }
+        return $this->getWrapperStorage()->getCache($path, $storage);
+    }
+
+    public function getScanner(string $path = '', ?IStorage $storage = null): IScanner {
+        if (!$storage) {
+            $storage = $this;
+        }
+        return $this->getWrapperStorage()->getScanner($path, $storage);
+    }
+
+    public function getOwner(string $path): string|false {
+        return $this->getWrapperStorage()->getOwner($path);
+    }
+
+    public function getWatcher(string $path = '', ?IStorage $storage = null): IWatcher {
+        if (!$storage) {
+            $storage = $this;
+        }
+        return $this->getWrapperStorage()->getWatcher($path, $storage);
+    }
+
+    public function getPropagator(?IStorage $storage = null): IPropagator {
+        if (!$storage) {
+            $storage = $this;
+        }
+        return $this->getWrapperStorage()->getPropagator($storage);
+    }
+
+    public function getUpdater(?IStorage $storage = null): IUpdater {
+        if (!$storage) {
+            $storage = $this;
+        }
+        return $this->getWrapperStorage()->getUpdater($storage);
+    }
+
+    public function getStorageCache(): \OC\Files\Cache\Storage {
+        return $this->getWrapperStorage()->getStorageCache();
+    }
+
+    public function getETag(string $path): string|false {
+        return $this->getWrapperStorage()->getETag($path);
+    }
+
+    public function test(): bool {
+        return $this->getWrapperStorage()->test();
+    }
+
+    public function isLocal(): bool {
+        return $this->getWrapperStorage()->isLocal();
+    }
+
+    public function instanceOfStorage(string $class): bool {
+        if (ltrim($class, '\\') === 'OC\Files\Storage\Shared') {
+            // FIXME Temporary fix to keep existing checks working
+            $class = '\OCA\Files_Sharing\SharedStorage';
+        }
+        return is_a($this, $class) or $this->getWrapperStorage()->instanceOfStorage($class);
+    }
+
+    /**
+     * @psalm-template T of IStorage
+     * @psalm-param class-string<T> $class
+     * @psalm-return T|null
+     */
+    public function getInstanceOfStorage(string $class): ?IStorage {
+        $storage = $this;
+        while ($storage instanceof Wrapper) {
+            if ($storage instanceof $class) {
+                break;
+            }
+            $storage = $storage->getWrapperStorage();
+        }
+        if (!($storage instanceof $class)) {
+            return null;
+        }
+        return $storage;
+    }
+
+    /**
+     * Pass any methods custom to specific storage implementations to the wrapped storage
+     *
+     * @return mixed
+     */
+    public function __call(string $method, array $args) {
+        return call_user_func_array([$this->getWrapperStorage(), $method], $args);
+    }
+
+    public function getDirectDownload(string $path): array|false {
+        return $this->getWrapperStorage()->getDirectDownload($path);
+    }
+
+    public function getAvailability(): array {
+        return $this->getWrapperStorage()->getAvailability();
+    }
+
+    public function setAvailability(bool $isAvailable): void {
+        $this->getWrapperStorage()->setAvailability($isAvailable);
+    }
+
+    public function verifyPath(string $path, string $fileName): void {
+        $this->getWrapperStorage()->verifyPath($path, $fileName);
+    }
+
+    public function copyFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
+        if ($sourceStorage === $this) {
+            return $this->copy($sourceInternalPath, $targetInternalPath);
+        }
+
+        return $this->getWrapperStorage()->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
+    }
+
+    public function moveFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
+        if ($sourceStorage === $this) {
+            return $this->rename($sourceInternalPath, $targetInternalPath);
+        }
+
+        return $this->getWrapperStorage()->moveFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
+    }
+
+    public function getMetaData(string $path): ?array {
+        return $this->getWrapperStorage()->getMetaData($path);
+    }
+
+    public function acquireLock(string $path, int $type, ILockingProvider $provider): void {
+        if ($this->getWrapperStorage()->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+            $this->getWrapperStorage()->acquireLock($path, $type, $provider);
+        }
+    }
+
+    public function releaseLock(string $path, int $type, ILockingProvider $provider): void {
+        if ($this->getWrapperStorage()->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+            $this->getWrapperStorage()->releaseLock($path, $type, $provider);
+        }
+    }
+
+    public function changeLock(string $path, int $type, ILockingProvider $provider): void {
+        if ($this->getWrapperStorage()->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+            $this->getWrapperStorage()->changeLock($path, $type, $provider);
+        }
+    }
+
+    public function needsPartFile(): bool {
+        return $this->getWrapperStorage()->needsPartFile();
+    }
+
+    public function writeStream(string $path, $stream, ?int $size = null): int {
+        $storage = $this->getWrapperStorage();
+        if ($storage->instanceOfStorage(IWriteStreamStorage::class)) {
+            /** @var IWriteStreamStorage $storage */
+            return $storage->writeStream($path, $stream, $size);
+        } else {
+            $target = $this->fopen($path, 'w');
+            $count = Files::streamCopy($stream, $target);
+            fclose($stream);
+            fclose($target);
+            return $count;
+        }
+    }
+
+    public function getDirectoryContent(string $directory): \Traversable {
+        return $this->getWrapperStorage()->getDirectoryContent($directory);
+    }
+
+    public function isWrapperOf(IStorage $storage): bool {
+        $wrapped = $this->getWrapperStorage();
+        if ($wrapped === $storage) {
+            return true;
+        }
+        if ($wrapped instanceof Wrapper) {
+            return $wrapped->isWrapperOf($storage);
+        }
+        return false;
+    }
+
+    public function setOwner(?string $user): void {
+        $this->getWrapperStorage()->setOwner($user);
+    }
 }

lib/private/Files/Storage/Wrapper/Jail.php

Indentation +239 added lines, -239 removed lines

@@ -25,243 +25,243 @@
  * This restricts access to a subfolder of the wrapped storage with the subfolder becoming the root folder new storage
  */
 class Jail extends Wrapper {
-	/**
-	 * @var string
-	 */
-	protected $rootPath;
-
-	/**
-	 * @param array $parameters ['storage' => $storage, 'root' => $root]
-	 *
-	 * $storage: The storage that will be wrapper
-	 * $root: The folder in the wrapped storage that will become the root folder of the wrapped storage
-	 */
-	public function __construct(array $parameters) {
-		parent::__construct($parameters);
-		$this->rootPath = $parameters['root'];
-	}
-
-	public function getUnjailedPath(string $path): string {
-		return trim(Filesystem::normalizePath($this->rootPath . '/' . $path), '/');
-	}
-
-	/**
-	 * This is separate from Wrapper::getWrapperStorage so we can get the jailed storage consistently even if the jail is inside another wrapper
-	 */
-	public function getUnjailedStorage(): IStorage {
-		return $this->storage;
-	}
-
-
-	public function getJailedPath(string $path): ?string {
-		$root = rtrim($this->rootPath, '/') . '/';
-
-		if ($path !== $this->rootPath && !str_starts_with($path, $root)) {
-			return null;
-		} else {
-			$path = substr($path, strlen($this->rootPath));
-			return trim($path, '/');
-		}
-	}
-
-	public function getId(): string {
-		return parent::getId();
-	}
-
-	public function mkdir(string $path): bool {
-		return $this->getWrapperStorage()->mkdir($this->getUnjailedPath($path));
-	}
-
-	public function rmdir(string $path): bool {
-		return $this->getWrapperStorage()->rmdir($this->getUnjailedPath($path));
-	}
-
-	public function opendir(string $path) {
-		return $this->getWrapperStorage()->opendir($this->getUnjailedPath($path));
-	}
-
-	public function is_dir(string $path): bool {
-		return $this->getWrapperStorage()->is_dir($this->getUnjailedPath($path));
-	}
-
-	public function is_file(string $path): bool {
-		return $this->getWrapperStorage()->is_file($this->getUnjailedPath($path));
-	}
-
-	public function stat(string $path): array|false {
-		return $this->getWrapperStorage()->stat($this->getUnjailedPath($path));
-	}
-
-	public function filetype(string $path): string|false {
-		return $this->getWrapperStorage()->filetype($this->getUnjailedPath($path));
-	}
-
-	public function filesize(string $path): int|float|false {
-		return $this->getWrapperStorage()->filesize($this->getUnjailedPath($path));
-	}
-
-	public function isCreatable(string $path): bool {
-		return $this->getWrapperStorage()->isCreatable($this->getUnjailedPath($path));
-	}
-
-	public function isReadable(string $path): bool {
-		return $this->getWrapperStorage()->isReadable($this->getUnjailedPath($path));
-	}
-
-	public function isUpdatable(string $path): bool {
-		return $this->getWrapperStorage()->isUpdatable($this->getUnjailedPath($path));
-	}
-
-	public function isDeletable(string $path): bool {
-		return $this->getWrapperStorage()->isDeletable($this->getUnjailedPath($path));
-	}
-
-	public function isSharable(string $path): bool {
-		return $this->getWrapperStorage()->isSharable($this->getUnjailedPath($path));
-	}
-
-	public function getPermissions(string $path): int {
-		return $this->getWrapperStorage()->getPermissions($this->getUnjailedPath($path));
-	}
-
-	public function file_exists(string $path): bool {
-		return $this->getWrapperStorage()->file_exists($this->getUnjailedPath($path));
-	}
-
-	public function filemtime(string $path): int|false {
-		return $this->getWrapperStorage()->filemtime($this->getUnjailedPath($path));
-	}
-
-	public function file_get_contents(string $path): string|false {
-		return $this->getWrapperStorage()->file_get_contents($this->getUnjailedPath($path));
-	}
-
-	public function file_put_contents(string $path, mixed $data): int|float|false {
-		return $this->getWrapperStorage()->file_put_contents($this->getUnjailedPath($path), $data);
-	}
-
-	public function unlink(string $path): bool {
-		return $this->getWrapperStorage()->unlink($this->getUnjailedPath($path));
-	}
-
-	public function rename(string $source, string $target): bool {
-		return $this->getWrapperStorage()->rename($this->getUnjailedPath($source), $this->getUnjailedPath($target));
-	}
-
-	public function copy(string $source, string $target): bool {
-		return $this->getWrapperStorage()->copy($this->getUnjailedPath($source), $this->getUnjailedPath($target));
-	}
-
-	public function fopen(string $path, string $mode) {
-		return $this->getWrapperStorage()->fopen($this->getUnjailedPath($path), $mode);
-	}
-
-	public function getMimeType(string $path): string|false {
-		return $this->getWrapperStorage()->getMimeType($this->getUnjailedPath($path));
-	}
-
-	public function hash(string $type, string $path, bool $raw = false): string|false {
-		return $this->getWrapperStorage()->hash($type, $this->getUnjailedPath($path), $raw);
-	}
-
-	public function free_space(string $path): int|float|false {
-		return $this->getWrapperStorage()->free_space($this->getUnjailedPath($path));
-	}
-
-	public function touch(string $path, ?int $mtime = null): bool {
-		return $this->getWrapperStorage()->touch($this->getUnjailedPath($path), $mtime);
-	}
-
-	public function getLocalFile(string $path): string|false {
-		return $this->getWrapperStorage()->getLocalFile($this->getUnjailedPath($path));
-	}
-
-	public function hasUpdated(string $path, int $time): bool {
-		return $this->getWrapperStorage()->hasUpdated($this->getUnjailedPath($path), $time);
-	}
-
-	public function getCache(string $path = '', ?IStorage $storage = null): ICache {
-		$sourceCache = $this->getWrapperStorage()->getCache($this->getUnjailedPath($path));
-		return new CacheJail($sourceCache, $this->rootPath);
-	}
-
-	public function getOwner(string $path): string|false {
-		return $this->getWrapperStorage()->getOwner($this->getUnjailedPath($path));
-	}
-
-	public function getWatcher(string $path = '', ?IStorage $storage = null): IWatcher {
-		$sourceWatcher = $this->getWrapperStorage()->getWatcher($this->getUnjailedPath($path), $this->getWrapperStorage());
-		return new JailWatcher($sourceWatcher, $this->rootPath);
-	}
-
-	public function getETag(string $path): string|false {
-		return $this->getWrapperStorage()->getETag($this->getUnjailedPath($path));
-	}
-
-	public function getMetaData(string $path): ?array {
-		return $this->getWrapperStorage()->getMetaData($this->getUnjailedPath($path));
-	}
-
-	public function acquireLock(string $path, int $type, ILockingProvider $provider): void {
-		$this->getWrapperStorage()->acquireLock($this->getUnjailedPath($path), $type, $provider);
-	}
-
-	public function releaseLock(string $path, int $type, ILockingProvider $provider): void {
-		$this->getWrapperStorage()->releaseLock($this->getUnjailedPath($path), $type, $provider);
-	}
-
-	public function changeLock(string $path, int $type, ILockingProvider $provider): void {
-		$this->getWrapperStorage()->changeLock($this->getUnjailedPath($path), $type, $provider);
-	}
-
-	/**
-	 * Resolve the path for the source of the share
-	 */
-	public function resolvePath(string $path): array {
-		return [$this->getWrapperStorage(), $this->getUnjailedPath($path)];
-	}
-
-	public function copyFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
-		if ($sourceStorage === $this) {
-			return $this->copy($sourceInternalPath, $targetInternalPath);
-		}
-		return $this->getWrapperStorage()->copyFromStorage($sourceStorage, $sourceInternalPath, $this->getUnjailedPath($targetInternalPath));
-	}
-
-	public function moveFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
-		if ($sourceStorage === $this) {
-			return $this->rename($sourceInternalPath, $targetInternalPath);
-		}
-		return $this->getWrapperStorage()->moveFromStorage($sourceStorage, $sourceInternalPath, $this->getUnjailedPath($targetInternalPath));
-	}
-
-	public function getPropagator(?IStorage $storage = null): IPropagator {
-		if (isset($this->propagator)) {
-			return $this->propagator;
-		}
-
-		if (!$storage) {
-			$storage = $this;
-		}
-		$this->propagator = new JailPropagator($storage, \OC::$server->getDatabaseConnection());
-		return $this->propagator;
-	}
-
-	public function writeStream(string $path, $stream, ?int $size = null): int {
-		$storage = $this->getWrapperStorage();
-		if ($storage->instanceOfStorage(IWriteStreamStorage::class)) {
-			/** @var IWriteStreamStorage $storage */
-			return $storage->writeStream($this->getUnjailedPath($path), $stream, $size);
-		} else {
-			$target = $this->fopen($path, 'w');
-			$count = Files::streamCopy($stream, $target);
-			fclose($stream);
-			fclose($target);
-			return $count;
-		}
-	}
-
-	public function getDirectoryContent(string $directory): \Traversable {
-		return $this->getWrapperStorage()->getDirectoryContent($this->getUnjailedPath($directory));
-	}
+    /**
+     * @var string
+     */
+    protected $rootPath;
+
+    /**
+     * @param array $parameters ['storage' => $storage, 'root' => $root]
+     *
+     * $storage: The storage that will be wrapper
+     * $root: The folder in the wrapped storage that will become the root folder of the wrapped storage
+     */
+    public function __construct(array $parameters) {
+        parent::__construct($parameters);
+        $this->rootPath = $parameters['root'];
+    }
+
+    public function getUnjailedPath(string $path): string {
+        return trim(Filesystem::normalizePath($this->rootPath . '/' . $path), '/');
+    }
+
+    /**
+     * This is separate from Wrapper::getWrapperStorage so we can get the jailed storage consistently even if the jail is inside another wrapper
+     */
+    public function getUnjailedStorage(): IStorage {
+        return $this->storage;
+    }
+
+
+    public function getJailedPath(string $path): ?string {
+        $root = rtrim($this->rootPath, '/') . '/';
+
+        if ($path !== $this->rootPath && !str_starts_with($path, $root)) {
+            return null;
+        } else {
+            $path = substr($path, strlen($this->rootPath));
+            return trim($path, '/');
+        }
+    }
+
+    public function getId(): string {
+        return parent::getId();
+    }
+
+    public function mkdir(string $path): bool {
+        return $this->getWrapperStorage()->mkdir($this->getUnjailedPath($path));
+    }
+
+    public function rmdir(string $path): bool {
+        return $this->getWrapperStorage()->rmdir($this->getUnjailedPath($path));
+    }
+
+    public function opendir(string $path) {
+        return $this->getWrapperStorage()->opendir($this->getUnjailedPath($path));
+    }
+
+    public function is_dir(string $path): bool {
+        return $this->getWrapperStorage()->is_dir($this->getUnjailedPath($path));
+    }
+
+    public function is_file(string $path): bool {
+        return $this->getWrapperStorage()->is_file($this->getUnjailedPath($path));
+    }
+
+    public function stat(string $path): array|false {
+        return $this->getWrapperStorage()->stat($this->getUnjailedPath($path));
+    }
+
+    public function filetype(string $path): string|false {
+        return $this->getWrapperStorage()->filetype($this->getUnjailedPath($path));
+    }
+
+    public function filesize(string $path): int|float|false {
+        return $this->getWrapperStorage()->filesize($this->getUnjailedPath($path));
+    }
+
+    public function isCreatable(string $path): bool {
+        return $this->getWrapperStorage()->isCreatable($this->getUnjailedPath($path));
+    }
+
+    public function isReadable(string $path): bool {
+        return $this->getWrapperStorage()->isReadable($this->getUnjailedPath($path));
+    }
+
+    public function isUpdatable(string $path): bool {
+        return $this->getWrapperStorage()->isUpdatable($this->getUnjailedPath($path));
+    }
+
+    public function isDeletable(string $path): bool {
+        return $this->getWrapperStorage()->isDeletable($this->getUnjailedPath($path));
+    }
+
+    public function isSharable(string $path): bool {
+        return $this->getWrapperStorage()->isSharable($this->getUnjailedPath($path));
+    }
+
+    public function getPermissions(string $path): int {
+        return $this->getWrapperStorage()->getPermissions($this->getUnjailedPath($path));
+    }
+
+    public function file_exists(string $path): bool {
+        return $this->getWrapperStorage()->file_exists($this->getUnjailedPath($path));
+    }
+
+    public function filemtime(string $path): int|false {
+        return $this->getWrapperStorage()->filemtime($this->getUnjailedPath($path));
+    }
+
+    public function file_get_contents(string $path): string|false {
+        return $this->getWrapperStorage()->file_get_contents($this->getUnjailedPath($path));
+    }
+
+    public function file_put_contents(string $path, mixed $data): int|float|false {
+        return $this->getWrapperStorage()->file_put_contents($this->getUnjailedPath($path), $data);
+    }
+
+    public function unlink(string $path): bool {
+        return $this->getWrapperStorage()->unlink($this->getUnjailedPath($path));
+    }
+
+    public function rename(string $source, string $target): bool {
+        return $this->getWrapperStorage()->rename($this->getUnjailedPath($source), $this->getUnjailedPath($target));
+    }
+
+    public function copy(string $source, string $target): bool {
+        return $this->getWrapperStorage()->copy($this->getUnjailedPath($source), $this->getUnjailedPath($target));
+    }
+
+    public function fopen(string $path, string $mode) {
+        return $this->getWrapperStorage()->fopen($this->getUnjailedPath($path), $mode);
+    }
+
+    public function getMimeType(string $path): string|false {
+        return $this->getWrapperStorage()->getMimeType($this->getUnjailedPath($path));
+    }
+
+    public function hash(string $type, string $path, bool $raw = false): string|false {
+        return $this->getWrapperStorage()->hash($type, $this->getUnjailedPath($path), $raw);
+    }
+
+    public function free_space(string $path): int|float|false {
+        return $this->getWrapperStorage()->free_space($this->getUnjailedPath($path));
+    }
+
+    public function touch(string $path, ?int $mtime = null): bool {
+        return $this->getWrapperStorage()->touch($this->getUnjailedPath($path), $mtime);
+    }
+
+    public function getLocalFile(string $path): string|false {
+        return $this->getWrapperStorage()->getLocalFile($this->getUnjailedPath($path));
+    }
+
+    public function hasUpdated(string $path, int $time): bool {
+        return $this->getWrapperStorage()->hasUpdated($this->getUnjailedPath($path), $time);
+    }
+
+    public function getCache(string $path = '', ?IStorage $storage = null): ICache {
+        $sourceCache = $this->getWrapperStorage()->getCache($this->getUnjailedPath($path));
+        return new CacheJail($sourceCache, $this->rootPath);
+    }
+
+    public function getOwner(string $path): string|false {
+        return $this->getWrapperStorage()->getOwner($this->getUnjailedPath($path));
+    }
+
+    public function getWatcher(string $path = '', ?IStorage $storage = null): IWatcher {
+        $sourceWatcher = $this->getWrapperStorage()->getWatcher($this->getUnjailedPath($path), $this->getWrapperStorage());
+        return new JailWatcher($sourceWatcher, $this->rootPath);
+    }
+
+    public function getETag(string $path): string|false {
+        return $this->getWrapperStorage()->getETag($this->getUnjailedPath($path));
+    }
+
+    public function getMetaData(string $path): ?array {
+        return $this->getWrapperStorage()->getMetaData($this->getUnjailedPath($path));
+    }
+
+    public function acquireLock(string $path, int $type, ILockingProvider $provider): void {
+        $this->getWrapperStorage()->acquireLock($this->getUnjailedPath($path), $type, $provider);
+    }
+
+    public function releaseLock(string $path, int $type, ILockingProvider $provider): void {
+        $this->getWrapperStorage()->releaseLock($this->getUnjailedPath($path), $type, $provider);
+    }
+
+    public function changeLock(string $path, int $type, ILockingProvider $provider): void {
+        $this->getWrapperStorage()->changeLock($this->getUnjailedPath($path), $type, $provider);
+    }
+
+    /**
+     * Resolve the path for the source of the share
+     */
+    public function resolvePath(string $path): array {
+        return [$this->getWrapperStorage(), $this->getUnjailedPath($path)];
+    }
+
+    public function copyFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
+        if ($sourceStorage === $this) {
+            return $this->copy($sourceInternalPath, $targetInternalPath);
+        }
+        return $this->getWrapperStorage()->copyFromStorage($sourceStorage, $sourceInternalPath, $this->getUnjailedPath($targetInternalPath));
+    }
+
+    public function moveFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
+        if ($sourceStorage === $this) {
+            return $this->rename($sourceInternalPath, $targetInternalPath);
+        }
+        return $this->getWrapperStorage()->moveFromStorage($sourceStorage, $sourceInternalPath, $this->getUnjailedPath($targetInternalPath));
+    }
+
+    public function getPropagator(?IStorage $storage = null): IPropagator {
+        if (isset($this->propagator)) {
+            return $this->propagator;
+        }
+
+        if (!$storage) {
+            $storage = $this;
+        }
+        $this->propagator = new JailPropagator($storage, \OC::$server->getDatabaseConnection());
+        return $this->propagator;
+    }
+
+    public function writeStream(string $path, $stream, ?int $size = null): int {
+        $storage = $this->getWrapperStorage();
+        if ($storage->instanceOfStorage(IWriteStreamStorage::class)) {
+            /** @var IWriteStreamStorage $storage */
+            return $storage->writeStream($this->getUnjailedPath($path), $stream, $size);
+        } else {
+            $target = $this->fopen($path, 'w');
+            $count = Files::streamCopy($stream, $target);
+            fclose($stream);
+            fclose($target);
+            return $count;
+        }
+    }
+
+    public function getDirectoryContent(string $directory): \Traversable {
+        return $this->getWrapperStorage()->getDirectoryContent($this->getUnjailedPath($directory));
+    }
 }

lib/private/Files/Storage/Wrapper/Encryption.php

Indentation +901 added lines, -901 removed lines

@@ -28,905 +28,905 @@
 use Psr\Log\LoggerInterface;
 
 class Encryption extends Wrapper {
-	use LocalTempFileTrait;
-
-	private string $mountPoint;
-	protected array $unencryptedSize = [];
-	private IMountPoint $mount;
-	/** for which path we execute the repair step to avoid recursions */
-	private array $fixUnencryptedSizeOf = [];
-	/** @var CappedMemoryCache<bool> */
-	private CappedMemoryCache $encryptedPaths;
-	private bool $enabled = true;
-
-	/**
-	 * @param array $parameters
-	 */
-	public function __construct(
-		array $parameters,
-		private IManager $encryptionManager,
-		private Util $util,
-		private LoggerInterface $logger,
-		private IFile $fileHelper,
-		private ?string $uid,
-		private IStorage $keyStorage,
-		private Manager $mountManager,
-		private ArrayCache $arrayCache,
-	) {
-		$this->mountPoint = $parameters['mountPoint'];
-		$this->mount = $parameters['mount'];
-		$this->encryptedPaths = new CappedMemoryCache();
-		parent::__construct($parameters);
-	}
-
-	public function filesize(string $path): int|float|false {
-		$fullPath = $this->getFullPath($path);
-
-		$info = $this->getCache()->get($path);
-		if ($info === false) {
-			/* Pass call to wrapped storage, it may be a special file like a part file */
-			return $this->storage->filesize($path);
-		}
-		if (isset($this->unencryptedSize[$fullPath])) {
-			$size = $this->unencryptedSize[$fullPath];
-
-			// Update file cache (only if file is already cached).
-			// Certain files are not cached (e.g. *.part).
-			if (isset($info['fileid'])) {
-				if ($info instanceof ICacheEntry) {
-					$info['encrypted'] = $info['encryptedVersion'];
-				} else {
-					/**
-					 * @psalm-suppress RedundantCondition
-					 */
-					if (!is_array($info)) {
-						$info = [];
-					}
-					$info['encrypted'] = true;
-					$info = new CacheEntry($info);
-				}
-
-				if ($size !== $info->getUnencryptedSize()) {
-					$this->getCache()->update($info->getId(), [
-						'unencrypted_size' => $size
-					]);
-				}
-			}
-
-			return $size;
-		}
-
-		if (isset($info['fileid']) && $info['encrypted']) {
-			return $this->verifyUnencryptedSize($path, $info->getUnencryptedSize());
-		}
-
-		return $this->storage->filesize($path);
-	}
-
-	private function modifyMetaData(string $path, array $data): array {
-		$fullPath = $this->getFullPath($path);
-		$info = $this->getCache()->get($path);
-
-		if (isset($this->unencryptedSize[$fullPath])) {
-			$data['encrypted'] = true;
-			$data['size'] = $this->unencryptedSize[$fullPath];
-			$data['unencrypted_size'] = $data['size'];
-		} else {
-			if (isset($info['fileid']) && $info['encrypted']) {
-				$data['size'] = $this->verifyUnencryptedSize($path, $info->getUnencryptedSize());
-				$data['encrypted'] = true;
-				$data['unencrypted_size'] = $data['size'];
-			}
-		}
-
-		if (isset($info['encryptedVersion']) && $info['encryptedVersion'] > 1) {
-			$data['encryptedVersion'] = $info['encryptedVersion'];
-		}
-
-		return $data;
-	}
-
-	public function getMetaData(string $path): ?array {
-		$data = $this->storage->getMetaData($path);
-		if (is_null($data)) {
-			return null;
-		}
-		return $this->modifyMetaData($path, $data);
-	}
-
-	public function getDirectoryContent(string $directory): \Traversable {
-		$parent = rtrim($directory, '/');
-		foreach ($this->getWrapperStorage()->getDirectoryContent($directory) as $data) {
-			yield $this->modifyMetaData($parent . '/' . $data['name'], $data);
-		}
-	}
-
-	public function file_get_contents(string $path): string|false {
-		$encryptionModule = $this->getEncryptionModule($path);
-
-		if ($encryptionModule) {
-			$handle = $this->fopen($path, 'r');
-			if (!$handle) {
-				return false;
-			}
-			$data = stream_get_contents($handle);
-			fclose($handle);
-			return $data;
-		}
-		return $this->storage->file_get_contents($path);
-	}
-
-	public function file_put_contents(string $path, mixed $data): int|float|false {
-		// file put content will always be translated to a stream write
-		$handle = $this->fopen($path, 'w');
-		if (is_resource($handle)) {
-			$written = fwrite($handle, $data);
-			fclose($handle);
-			return $written;
-		}
-
-		return false;
-	}
-
-	public function unlink(string $path): bool {
-		$fullPath = $this->getFullPath($path);
-		if ($this->util->isExcluded($fullPath)) {
-			return $this->storage->unlink($path);
-		}
-
-		$encryptionModule = $this->getEncryptionModule($path);
-		if ($encryptionModule) {
-			$this->keyStorage->deleteAllFileKeys($fullPath);
-		}
-
-		return $this->storage->unlink($path);
-	}
-
-	public function rename(string $source, string $target): bool {
-		$result = $this->storage->rename($source, $target);
-
-		if ($result &&
-			// versions always use the keys from the original file, so we can skip
-			// this step for versions
-			$this->isVersion($target) === false &&
-			$this->encryptionManager->isEnabled()) {
-			$sourcePath = $this->getFullPath($source);
-			if (!$this->util->isExcluded($sourcePath)) {
-				$targetPath = $this->getFullPath($target);
-				if (isset($this->unencryptedSize[$sourcePath])) {
-					$this->unencryptedSize[$targetPath] = $this->unencryptedSize[$sourcePath];
-				}
-				$this->keyStorage->renameKeys($sourcePath, $targetPath);
-				$module = $this->getEncryptionModule($target);
-				if ($module) {
-					$module->update($targetPath, $this->uid, []);
-				}
-			}
-		}
-
-		return $result;
-	}
-
-	public function rmdir(string $path): bool {
-		$result = $this->storage->rmdir($path);
-		$fullPath = $this->getFullPath($path);
-		if ($result &&
-			$this->util->isExcluded($fullPath) === false &&
-			$this->encryptionManager->isEnabled()
-		) {
-			$this->keyStorage->deleteAllFileKeys($fullPath);
-		}
-
-		return $result;
-	}
-
-	public function isReadable(string $path): bool {
-		$isReadable = true;
-
-		$metaData = $this->getMetaData($path);
-		if (
-			!$this->is_dir($path) &&
-			isset($metaData['encrypted']) &&
-			$metaData['encrypted'] === true
-		) {
-			$fullPath = $this->getFullPath($path);
-			$module = $this->getEncryptionModule($path);
-			$isReadable = $module->isReadable($fullPath, $this->uid);
-		}
-
-		return $this->storage->isReadable($path) && $isReadable;
-	}
-
-	public function copy(string $source, string $target): bool {
-		$sourcePath = $this->getFullPath($source);
-
-		if ($this->util->isExcluded($sourcePath)) {
-			return $this->storage->copy($source, $target);
-		}
-
-		// need to stream copy file by file in case we copy between a encrypted
-		// and a unencrypted storage
-		$this->unlink($target);
-		return $this->copyFromStorage($this, $source, $target);
-	}
-
-	public function fopen(string $path, string $mode) {
-		// check if the file is stored in the array cache, this means that we
-		// copy a file over to the versions folder, in this case we don't want to
-		// decrypt it
-		if ($this->arrayCache->hasKey('encryption_copy_version_' . $path)) {
-			$this->arrayCache->remove('encryption_copy_version_' . $path);
-			return $this->storage->fopen($path, $mode);
-		}
-
-		if (!$this->enabled) {
-			return $this->storage->fopen($path, $mode);
-		}
-
-		$encryptionEnabled = $this->encryptionManager->isEnabled();
-		$shouldEncrypt = false;
-		$encryptionModule = null;
-		$header = $this->getHeader($path);
-		$signed = isset($header['signed']) && $header['signed'] === 'true';
-		$fullPath = $this->getFullPath($path);
-		$encryptionModuleId = $this->util->getEncryptionModuleId($header);
-
-		if ($this->util->isExcluded($fullPath) === false) {
-			$size = $unencryptedSize = 0;
-			$realFile = $this->util->stripPartialFileExtension($path);
-			$targetExists = $this->is_file($realFile) || $this->file_exists($path);
-			$targetIsEncrypted = false;
-			if ($targetExists) {
-				// in case the file exists we require the explicit module as
-				// specified in the file header - otherwise we need to fail hard to
-				// prevent data loss on client side
-				if (!empty($encryptionModuleId)) {
-					$targetIsEncrypted = true;
-					$encryptionModule = $this->encryptionManager->getEncryptionModule($encryptionModuleId);
-				}
-
-				if ($this->file_exists($path)) {
-					$size = $this->storage->filesize($path);
-					$unencryptedSize = $this->filesize($path);
-				} else {
-					$size = $unencryptedSize = 0;
-				}
-			}
-
-			try {
-				if (
-					$mode === 'w'
-					|| $mode === 'w+'
-					|| $mode === 'wb'
-					|| $mode === 'wb+'
-				) {
-					// if we update a encrypted file with a un-encrypted one we change the db flag
-					if ($targetIsEncrypted && $encryptionEnabled === false) {
-						$cache = $this->storage->getCache();
-						$entry = $cache->get($path);
-						$cache->update($entry->getId(), ['encrypted' => 0]);
-					}
-					if ($encryptionEnabled) {
-						// if $encryptionModuleId is empty, the default module will be used
-						$encryptionModule = $this->encryptionManager->getEncryptionModule($encryptionModuleId);
-						$shouldEncrypt = $encryptionModule->shouldEncrypt($fullPath);
-						$signed = true;
-					}
-				} else {
-					$info = $this->getCache()->get($path);
-					// only get encryption module if we found one in the header
-					// or if file should be encrypted according to the file cache
-					if (!empty($encryptionModuleId)) {
-						$encryptionModule = $this->encryptionManager->getEncryptionModule($encryptionModuleId);
-						$shouldEncrypt = true;
-					} elseif ($info !== false && $info['encrypted'] === true) {
-						// we come from a old installation. No header and/or no module defined
-						// but the file is encrypted. In this case we need to use the
-						// OC_DEFAULT_MODULE to read the file
-						$encryptionModule = $this->encryptionManager->getEncryptionModule('OC_DEFAULT_MODULE');
-						$shouldEncrypt = true;
-						$targetIsEncrypted = true;
-					}
-				}
-			} catch (ModuleDoesNotExistsException $e) {
-				$this->logger->warning('Encryption module "' . $encryptionModuleId . '" not found, file will be stored unencrypted', [
-					'exception' => $e,
-					'app' => 'core',
-				]);
-			}
-
-			// encryption disabled on write of new file and write to existing unencrypted file -> don't encrypt
-			if (!$encryptionEnabled || !$this->shouldEncrypt($path)) {
-				if (!$targetExists || !$targetIsEncrypted) {
-					$shouldEncrypt = false;
-				}
-			}
-
-			if ($shouldEncrypt === true && $encryptionModule !== null) {
-				$this->encryptedPaths->set($this->util->stripPartialFileExtension($path), true);
-				$headerSize = $this->getHeaderSize($path);
-				if ($mode === 'r' && $headerSize === 0) {
-					$firstBlock = $this->readFirstBlock($path);
-					if (!$firstBlock) {
-						throw new InvalidHeaderException("Unable to get header block for $path");
-					} elseif (!str_starts_with($firstBlock, Util::HEADER_START)) {
-						throw new InvalidHeaderException("Unable to get header size for $path, file doesn't start with encryption header");
-					} else {
-						throw new InvalidHeaderException("Unable to get header size for $path, even though file does start with encryption header");
-					}
-				}
-				$source = $this->storage->fopen($path, $mode);
-				if (!is_resource($source)) {
-					return false;
-				}
-				$handle = \OC\Files\Stream\Encryption::wrap($source, $path, $fullPath, $header,
-					$this->uid, $encryptionModule, $this->storage, $this, $this->util, $this->fileHelper, $mode,
-					$size, $unencryptedSize, $headerSize, $signed);
-
-				return $handle;
-			}
-		}
-
-		return $this->storage->fopen($path, $mode);
-	}
-
-
-	/**
-	 * perform some plausibility checks if the unencrypted size is correct.
-	 * If not, we calculate the correct unencrypted size and return it
-	 *
-	 * @param string $path internal path relative to the storage root
-	 * @param int $unencryptedSize size of the unencrypted file
-	 *
-	 * @return int unencrypted size
-	 */
-	protected function verifyUnencryptedSize(string $path, int $unencryptedSize): int {
-		$size = $this->storage->filesize($path);
-		$result = $unencryptedSize;
-
-		if ($unencryptedSize < 0 ||
-			($size > 0 && $unencryptedSize === $size) ||
-			$unencryptedSize > $size
-		) {
-			// check if we already calculate the unencrypted size for the
-			// given path to avoid recursions
-			if (isset($this->fixUnencryptedSizeOf[$this->getFullPath($path)]) === false) {
-				$this->fixUnencryptedSizeOf[$this->getFullPath($path)] = true;
-				try {
-					$result = $this->fixUnencryptedSize($path, $size, $unencryptedSize);
-				} catch (\Exception $e) {
-					$this->logger->error('Couldn\'t re-calculate unencrypted size for ' . $path, ['exception' => $e]);
-				}
-				unset($this->fixUnencryptedSizeOf[$this->getFullPath($path)]);
-			}
-		}
-
-		return $result;
-	}
-
-	/**
-	 * calculate the unencrypted size
-	 *
-	 * @param string $path internal path relative to the storage root
-	 * @param int $size size of the physical file
-	 * @param int $unencryptedSize size of the unencrypted file
-	 */
-	protected function fixUnencryptedSize(string $path, int $size, int $unencryptedSize): int|float {
-		$headerSize = $this->getHeaderSize($path);
-		$header = $this->getHeader($path);
-		$encryptionModule = $this->getEncryptionModule($path);
-
-		$stream = $this->storage->fopen($path, 'r');
-
-		// if we couldn't open the file we return the old unencrypted size
-		if (!is_resource($stream)) {
-			$this->logger->error('Could not open ' . $path . '. Recalculation of unencrypted size aborted.');
-			return $unencryptedSize;
-		}
-
-		$newUnencryptedSize = 0;
-		$size -= $headerSize;
-		$blockSize = $this->util->getBlockSize();
-
-		// if a header exists we skip it
-		if ($headerSize > 0) {
-			$this->fread_block($stream, $headerSize);
-		}
-
-		// fast path, else the calculation for $lastChunkNr is bogus
-		if ($size === 0) {
-			return 0;
-		}
-
-		$signed = isset($header['signed']) && $header['signed'] === 'true';
-		$unencryptedBlockSize = $encryptionModule->getUnencryptedBlockSize($signed);
-
-		// calculate last chunk nr
-		// next highest is end of chunks, one subtracted is last one
-		// we have to read the last chunk, we can't just calculate it (because of padding etc)
-
-		$lastChunkNr = ceil($size / $blockSize) - 1;
-		// calculate last chunk position
-		$lastChunkPos = ($lastChunkNr * $blockSize);
-		// try to fseek to the last chunk, if it fails we have to read the whole file
-		if (@fseek($stream, $lastChunkPos, SEEK_CUR) === 0) {
-			$newUnencryptedSize += $lastChunkNr * $unencryptedBlockSize;
-		}
-
-		$lastChunkContentEncrypted = '';
-		$count = $blockSize;
-
-		while ($count > 0) {
-			$data = $this->fread_block($stream, $blockSize);
-			$count = strlen($data);
-			$lastChunkContentEncrypted .= $data;
-			if (strlen($lastChunkContentEncrypted) > $blockSize) {
-				$newUnencryptedSize += $unencryptedBlockSize;
-				$lastChunkContentEncrypted = substr($lastChunkContentEncrypted, $blockSize);
-			}
-		}
-
-		fclose($stream);
-
-		// we have to decrypt the last chunk to get it actual size
-		$encryptionModule->begin($this->getFullPath($path), $this->uid, 'r', $header, []);
-		$decryptedLastChunk = $encryptionModule->decrypt($lastChunkContentEncrypted, $lastChunkNr . 'end');
-		$decryptedLastChunk .= $encryptionModule->end($this->getFullPath($path), $lastChunkNr . 'end');
-
-		// calc the real file size with the size of the last chunk
-		$newUnencryptedSize += strlen($decryptedLastChunk);
-
-		$this->updateUnencryptedSize($this->getFullPath($path), $newUnencryptedSize);
-
-		// write to cache if applicable
-		$cache = $this->storage->getCache();
-		$entry = $cache->get($path);
-		$cache->update($entry['fileid'], [
-			'unencrypted_size' => $newUnencryptedSize
-		]);
-
-		return $newUnencryptedSize;
-	}
-
-	/**
-	 * fread_block
-	 *
-	 * This function is a wrapper around the fread function.  It is based on the
-	 * stream_read_block function from lib/private/Files/Streams/Encryption.php
-	 * It calls stream read until the requested $blockSize was received or no remaining data is present.
-	 * This is required as stream_read only returns smaller chunks of data when the stream fetches from a
-	 * remote storage over the internet and it does not care about the given $blockSize.
-	 *
-	 * @param resource $handle the stream to read from
-	 * @param int $blockSize Length of requested data block in bytes
-	 * @return string Data fetched from stream.
-	 */
-	private function fread_block($handle, int $blockSize): string {
-		$remaining = $blockSize;
-		$data = '';
-
-		do {
-			$chunk = fread($handle, $remaining);
-			$chunk_len = strlen($chunk);
-			$data .= $chunk;
-			$remaining -= $chunk_len;
-		} while (($remaining > 0) && ($chunk_len > 0));
-
-		return $data;
-	}
-
-	public function moveFromStorage(
-		Storage\IStorage $sourceStorage,
-		string $sourceInternalPath,
-		string $targetInternalPath,
-		$preserveMtime = true,
-	): bool {
-		if ($sourceStorage === $this) {
-			return $this->rename($sourceInternalPath, $targetInternalPath);
-		}
-
-		// TODO clean this up once the underlying moveFromStorage in OC\Files\Storage\Wrapper\Common is fixed:
-		// - call $this->storage->moveFromStorage() instead of $this->copyBetweenStorage
-		// - copy the file cache update from  $this->copyBetweenStorage to this method
-		// - copy the copyKeys() call from  $this->copyBetweenStorage to this method
-		// - remove $this->copyBetweenStorage
-
-		if (!$sourceStorage->isDeletable($sourceInternalPath)) {
-			return false;
-		}
-
-		$result = $this->copyBetweenStorage($sourceStorage, $sourceInternalPath, $targetInternalPath, $preserveMtime, true);
-		if ($result) {
-			$setPreserveCacheOnDelete = $sourceStorage->instanceOfStorage(ObjectStoreStorage::class) && !$this->instanceOfStorage(ObjectStoreStorage::class);
-			if ($setPreserveCacheOnDelete) {
-				/** @var ObjectStoreStorage $sourceStorage */
-				$sourceStorage->setPreserveCacheOnDelete(true);
-			}
-			try {
-				if ($sourceStorage->is_dir($sourceInternalPath)) {
-					$result = $sourceStorage->rmdir($sourceInternalPath);
-				} else {
-					$result = $sourceStorage->unlink($sourceInternalPath);
-				}
-			} finally {
-				if ($setPreserveCacheOnDelete) {
-					/** @var ObjectStoreStorage $sourceStorage */
-					$sourceStorage->setPreserveCacheOnDelete(false);
-				}
-			}
-		}
-		return $result;
-	}
-
-	public function copyFromStorage(
-		Storage\IStorage $sourceStorage,
-		string $sourceInternalPath,
-		string $targetInternalPath,
-		$preserveMtime = false,
-		$isRename = false,
-	): bool {
-		// TODO clean this up once the underlying moveFromStorage in OC\Files\Storage\Wrapper\Common is fixed:
-		// - call $this->storage->copyFromStorage() instead of $this->copyBetweenStorage
-		// - copy the file cache update from  $this->copyBetweenStorage to this method
-		// - copy the copyKeys() call from  $this->copyBetweenStorage to this method
-		// - remove $this->copyBetweenStorage
-
-		return $this->copyBetweenStorage($sourceStorage, $sourceInternalPath, $targetInternalPath, $preserveMtime, $isRename);
-	}
-
-	/**
-	 * Update the encrypted cache version in the database
-	 */
-	private function updateEncryptedVersion(
-		Storage\IStorage $sourceStorage,
-		string $sourceInternalPath,
-		string $targetInternalPath,
-		bool $isRename,
-		bool $keepEncryptionVersion,
-	): void {
-		$isEncrypted = $this->encryptionManager->isEnabled() && $this->shouldEncrypt($targetInternalPath);
-		$cacheInformation = [
-			'encrypted' => $isEncrypted,
-		];
-		if ($isEncrypted) {
-			$sourceCacheEntry = $sourceStorage->getCache()->get($sourceInternalPath);
-			$targetCacheEntry = $this->getCache()->get($targetInternalPath);
-
-			// Rename of the cache already happened, so we do the cleanup on the target
-			if ($sourceCacheEntry === false && $targetCacheEntry !== false) {
-				$encryptedVersion = $targetCacheEntry['encryptedVersion'];
-				$isRename = false;
-			} else {
-				$encryptedVersion = $sourceCacheEntry['encryptedVersion'];
-			}
-
-			// In case of a move operation from an unencrypted to an encrypted
-			// storage the old encrypted version would stay with "0" while the
-			// correct value would be "1". Thus we manually set the value to "1"
-			// for those cases.
-			// See also https://github.com/owncloud/core/issues/23078
-			if ($encryptedVersion === 0 || !$keepEncryptionVersion) {
-				$encryptedVersion = 1;
-			}
-
-			$cacheInformation['encryptedVersion'] = $encryptedVersion;
-		}
-
-		// in case of a rename we need to manipulate the source cache because
-		// this information will be kept for the new target
-		if ($isRename) {
-			$sourceStorage->getCache()->put($sourceInternalPath, $cacheInformation);
-		} else {
-			$this->getCache()->put($targetInternalPath, $cacheInformation);
-		}
-	}
-
-	/**
-	 * copy file between two storages
-	 * @throws \Exception
-	 */
-	private function copyBetweenStorage(
-		Storage\IStorage $sourceStorage,
-		string $sourceInternalPath,
-		string $targetInternalPath,
-		bool $preserveMtime,
-		bool $isRename,
-	): bool {
-		// for versions we have nothing to do, because versions should always use the
-		// key from the original file. Just create a 1:1 copy and done
-		if ($this->isVersion($targetInternalPath) ||
-			$this->isVersion($sourceInternalPath)) {
-			// remember that we try to create a version so that we can detect it during
-			// fopen($sourceInternalPath) and by-pass the encryption in order to
-			// create a 1:1 copy of the file
-			$this->arrayCache->set('encryption_copy_version_' . $sourceInternalPath, true);
-			$result = $this->storage->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
-			$this->arrayCache->remove('encryption_copy_version_' . $sourceInternalPath);
-			if ($result) {
-				$info = $this->getCache('', $sourceStorage)->get($sourceInternalPath);
-				// make sure that we update the unencrypted size for the version
-				if (isset($info['encrypted']) && $info['encrypted'] === true) {
-					$this->updateUnencryptedSize(
-						$this->getFullPath($targetInternalPath),
-						$info->getUnencryptedSize()
-					);
-				}
-				$this->updateEncryptedVersion($sourceStorage, $sourceInternalPath, $targetInternalPath, $isRename, true);
-			}
-			return $result;
-		}
-
-		// first copy the keys that we reuse the existing file key on the target location
-		// and don't create a new one which would break versions for example.
-		if ($sourceStorage->instanceOfStorage(Common::class) && $sourceStorage->getMountOption('mount_point')) {
-			$mountPoint = $sourceStorage->getMountOption('mount_point');
-			$source = $mountPoint . '/' . $sourceInternalPath;
-			$target = $this->getFullPath($targetInternalPath);
-			$this->copyKeys($source, $target);
-		} else {
-			$this->logger->error('Could not find mount point, can\'t keep encryption keys');
-		}
-
-		if ($sourceStorage->is_dir($sourceInternalPath)) {
-			$dh = $sourceStorage->opendir($sourceInternalPath);
-			if (!$this->is_dir($targetInternalPath)) {
-				$result = $this->mkdir($targetInternalPath);
-			} else {
-				$result = true;
-			}
-			if (is_resource($dh)) {
-				while ($result && ($file = readdir($dh)) !== false) {
-					if (!Filesystem::isIgnoredDir($file)) {
-						$result = $this->copyFromStorage($sourceStorage, $sourceInternalPath . '/' . $file, $targetInternalPath . '/' . $file, $preserveMtime, $isRename);
-					}
-				}
-			}
-		} else {
-			try {
-				$source = $sourceStorage->fopen($sourceInternalPath, 'r');
-				$target = $this->fopen($targetInternalPath, 'w');
-				[, $result] = Files::streamCopy($source, $target, true);
-			} finally {
-				if (is_resource($source)) {
-					fclose($source);
-				}
-				if (is_resource($target)) {
-					fclose($target);
-				}
-			}
-			if ($result) {
-				if ($preserveMtime) {
-					$this->touch($targetInternalPath, $sourceStorage->filemtime($sourceInternalPath));
-				}
-				$this->updateEncryptedVersion($sourceStorage, $sourceInternalPath, $targetInternalPath, $isRename, false);
-			} else {
-				// delete partially written target file
-				$this->unlink($targetInternalPath);
-				// delete cache entry that was created by fopen
-				$this->getCache()->remove($targetInternalPath);
-			}
-		}
-		return (bool)$result;
-	}
-
-	public function getLocalFile(string $path): string|false {
-		if ($this->encryptionManager->isEnabled()) {
-			$cachedFile = $this->getCachedFile($path);
-			if (is_string($cachedFile)) {
-				return $cachedFile;
-			}
-		}
-		return $this->storage->getLocalFile($path);
-	}
-
-	public function isLocal(): bool {
-		if ($this->encryptionManager->isEnabled()) {
-			return false;
-		}
-		return $this->storage->isLocal();
-	}
-
-	public function stat(string $path): array|false {
-		$stat = $this->storage->stat($path);
-		if (!$stat) {
-			return false;
-		}
-		$fileSize = $this->filesize($path);
-		$stat['size'] = $fileSize;
-		$stat[7] = $fileSize;
-		$stat['hasHeader'] = $this->getHeaderSize($path) > 0;
-		return $stat;
-	}
-
-	public function hash(string $type, string $path, bool $raw = false): string|false {
-		$fh = $this->fopen($path, 'rb');
-		$ctx = hash_init($type);
-		hash_update_stream($ctx, $fh);
-		fclose($fh);
-		return hash_final($ctx, $raw);
-	}
-
-	/**
-	 * return full path, including mount point
-	 *
-	 * @param string $path relative to mount point
-	 * @return string full path including mount point
-	 */
-	protected function getFullPath(string $path): string {
-		return Filesystem::normalizePath($this->mountPoint . '/' . $path);
-	}
-
-	/**
-	 * read first block of encrypted file, typically this will contain the
-	 * encryption header
-	 */
-	protected function readFirstBlock(string $path): string {
-		$firstBlock = '';
-		if ($this->storage->is_file($path)) {
-			$handle = $this->storage->fopen($path, 'r');
-			$firstBlock = fread($handle, $this->util->getHeaderSize());
-			fclose($handle);
-		}
-		return $firstBlock;
-	}
-
-	/**
-	 * return header size of given file
-	 */
-	protected function getHeaderSize(string $path): int {
-		$headerSize = 0;
-		$realFile = $this->util->stripPartialFileExtension($path);
-		if ($this->storage->is_file($realFile)) {
-			$path = $realFile;
-		}
-		$firstBlock = $this->readFirstBlock($path);
-
-		if (str_starts_with($firstBlock, Util::HEADER_START)) {
-			$headerSize = $this->util->getHeaderSize();
-		}
-
-		return $headerSize;
-	}
-
-	/**
-	 * read header from file
-	 */
-	protected function getHeader(string $path): array {
-		$realFile = $this->util->stripPartialFileExtension($path);
-		$exists = $this->storage->is_file($realFile);
-		if ($exists) {
-			$path = $realFile;
-		}
-
-		$result = [];
-
-		$isEncrypted = $this->encryptedPaths->get($realFile);
-		if (is_null($isEncrypted)) {
-			$info = $this->getCache()->get($path);
-			$isEncrypted = isset($info['encrypted']) && $info['encrypted'] === true;
-		}
-
-		if ($isEncrypted) {
-			$firstBlock = $this->readFirstBlock($path);
-			$result = $this->util->parseRawHeader($firstBlock);
-
-			// if the header doesn't contain a encryption module we check if it is a
-			// legacy file. If true, we add the default encryption module
-			if (!isset($result[Util::HEADER_ENCRYPTION_MODULE_KEY]) && (!empty($result) || $exists)) {
-				$result[Util::HEADER_ENCRYPTION_MODULE_KEY] = 'OC_DEFAULT_MODULE';
-			}
-		}
-
-		return $result;
-	}
-
-	/**
-	 * read encryption module needed to read/write the file located at $path
-	 *
-	 * @throws ModuleDoesNotExistsException
-	 * @throws \Exception
-	 */
-	protected function getEncryptionModule(string $path): ?\OCP\Encryption\IEncryptionModule {
-		$encryptionModule = null;
-		$header = $this->getHeader($path);
-		$encryptionModuleId = $this->util->getEncryptionModuleId($header);
-		if (!empty($encryptionModuleId)) {
-			try {
-				$encryptionModule = $this->encryptionManager->getEncryptionModule($encryptionModuleId);
-			} catch (ModuleDoesNotExistsException $e) {
-				$this->logger->critical('Encryption module defined in "' . $path . '" not loaded!');
-				throw $e;
-			}
-		}
-
-		return $encryptionModule;
-	}
-
-	public function updateUnencryptedSize(string $path, int|float $unencryptedSize): void {
-		$this->unencryptedSize[$path] = $unencryptedSize;
-	}
-
-	/**
-	 * copy keys to new location
-	 *
-	 * @param string $source path relative to data/
-	 * @param string $target path relative to data/
-	 */
-	protected function copyKeys(string $source, string $target): bool {
-		if (!$this->util->isExcluded($source)) {
-			return $this->keyStorage->copyKeys($source, $target);
-		}
-
-		return false;
-	}
-
-	/**
-	 * check if path points to a files version
-	 */
-	protected function isVersion(string $path): bool {
-		$normalized = Filesystem::normalizePath($path);
-		return substr($normalized, 0, strlen('/files_versions/')) === '/files_versions/';
-	}
-
-	/**
-	 * check if the given storage should be encrypted or not
-	 */
-	protected function shouldEncrypt(string $path): bool {
-		$fullPath = $this->getFullPath($path);
-		$mountPointConfig = $this->mount->getOption('encrypt', true);
-		if ($mountPointConfig === false) {
-			return false;
-		}
-
-		try {
-			$encryptionModule = $this->getEncryptionModule($fullPath);
-		} catch (ModuleDoesNotExistsException $e) {
-			return false;
-		}
-
-		if ($encryptionModule === null) {
-			$encryptionModule = $this->encryptionManager->getEncryptionModule();
-		}
-
-		return $encryptionModule->shouldEncrypt($fullPath);
-	}
-
-	public function writeStream(string $path, $stream, ?int $size = null): int {
-		// always fall back to fopen
-		$target = $this->fopen($path, 'w');
-		[$count, $result] = Files::streamCopy($stream, $target, true);
-		fclose($stream);
-		fclose($target);
-
-		// object store, stores the size after write and doesn't update this during scan
-		// manually store the unencrypted size
-		if ($result && $this->getWrapperStorage()->instanceOfStorage(ObjectStoreStorage::class) && $this->shouldEncrypt($path)) {
-			$this->getCache()->put($path, ['unencrypted_size' => $count]);
-		}
-
-		return $count;
-	}
-
-	public function clearIsEncryptedCache(): void {
-		$this->encryptedPaths->clear();
-	}
-
-	/**
-	 * Allow temporarily disabling the wrapper
-	 */
-	public function setEnabled(bool $enabled): void {
-		$this->enabled = $enabled;
-	}
-
-	/**
-	 * Check if the on-disk data for a file has a valid encrypted header
-	 *
-	 * @param string $path
-	 * @return bool
-	 */
-	public function hasValidHeader(string $path): bool {
-		$firstBlock = $this->readFirstBlock($path);
-		$header = $this->util->parseRawHeader($firstBlock);
-		return (count($header) > 0);
-	}
+    use LocalTempFileTrait;
+
+    private string $mountPoint;
+    protected array $unencryptedSize = [];
+    private IMountPoint $mount;
+    /** for which path we execute the repair step to avoid recursions */
+    private array $fixUnencryptedSizeOf = [];
+    /** @var CappedMemoryCache<bool> */
+    private CappedMemoryCache $encryptedPaths;
+    private bool $enabled = true;
+
+    /**
+     * @param array $parameters
+     */
+    public function __construct(
+        array $parameters,
+        private IManager $encryptionManager,
+        private Util $util,
+        private LoggerInterface $logger,
+        private IFile $fileHelper,
+        private ?string $uid,
+        private IStorage $keyStorage,
+        private Manager $mountManager,
+        private ArrayCache $arrayCache,
+    ) {
+        $this->mountPoint = $parameters['mountPoint'];
+        $this->mount = $parameters['mount'];
+        $this->encryptedPaths = new CappedMemoryCache();
+        parent::__construct($parameters);
+    }
+
+    public function filesize(string $path): int|float|false {
+        $fullPath = $this->getFullPath($path);
+
+        $info = $this->getCache()->get($path);
+        if ($info === false) {
+            /* Pass call to wrapped storage, it may be a special file like a part file */
+            return $this->storage->filesize($path);
+        }
+        if (isset($this->unencryptedSize[$fullPath])) {
+            $size = $this->unencryptedSize[$fullPath];
+
+            // Update file cache (only if file is already cached).
+            // Certain files are not cached (e.g. *.part).
+            if (isset($info['fileid'])) {
+                if ($info instanceof ICacheEntry) {
+                    $info['encrypted'] = $info['encryptedVersion'];
+                } else {
+                    /**
+                     * @psalm-suppress RedundantCondition
+                     */
+                    if (!is_array($info)) {
+                        $info = [];
+                    }
+                    $info['encrypted'] = true;
+                    $info = new CacheEntry($info);
+                }
+
+                if ($size !== $info->getUnencryptedSize()) {
+                    $this->getCache()->update($info->getId(), [
+                        'unencrypted_size' => $size
+                    ]);
+                }
+            }
+
+            return $size;
+        }
+
+        if (isset($info['fileid']) && $info['encrypted']) {
+            return $this->verifyUnencryptedSize($path, $info->getUnencryptedSize());
+        }
+
+        return $this->storage->filesize($path);
+    }
+
+    private function modifyMetaData(string $path, array $data): array {
+        $fullPath = $this->getFullPath($path);
+        $info = $this->getCache()->get($path);
+
+        if (isset($this->unencryptedSize[$fullPath])) {
+            $data['encrypted'] = true;
+            $data['size'] = $this->unencryptedSize[$fullPath];
+            $data['unencrypted_size'] = $data['size'];
+        } else {
+            if (isset($info['fileid']) && $info['encrypted']) {
+                $data['size'] = $this->verifyUnencryptedSize($path, $info->getUnencryptedSize());
+                $data['encrypted'] = true;
+                $data['unencrypted_size'] = $data['size'];
+            }
+        }
+
+        if (isset($info['encryptedVersion']) && $info['encryptedVersion'] > 1) {
+            $data['encryptedVersion'] = $info['encryptedVersion'];
+        }
+
+        return $data;
+    }
+
+    public function getMetaData(string $path): ?array {
+        $data = $this->storage->getMetaData($path);
+        if (is_null($data)) {
+            return null;
+        }
+        return $this->modifyMetaData($path, $data);
+    }
+
+    public function getDirectoryContent(string $directory): \Traversable {
+        $parent = rtrim($directory, '/');
+        foreach ($this->getWrapperStorage()->getDirectoryContent($directory) as $data) {
+            yield $this->modifyMetaData($parent . '/' . $data['name'], $data);
+        }
+    }
+
+    public function file_get_contents(string $path): string|false {
+        $encryptionModule = $this->getEncryptionModule($path);
+
+        if ($encryptionModule) {
+            $handle = $this->fopen($path, 'r');
+            if (!$handle) {
+                return false;
+            }
+            $data = stream_get_contents($handle);
+            fclose($handle);
+            return $data;
+        }
+        return $this->storage->file_get_contents($path);
+    }
+
+    public function file_put_contents(string $path, mixed $data): int|float|false {
+        // file put content will always be translated to a stream write
+        $handle = $this->fopen($path, 'w');
+        if (is_resource($handle)) {
+            $written = fwrite($handle, $data);
+            fclose($handle);
+            return $written;
+        }
+
+        return false;
+    }
+
+    public function unlink(string $path): bool {
+        $fullPath = $this->getFullPath($path);
+        if ($this->util->isExcluded($fullPath)) {
+            return $this->storage->unlink($path);
+        }
+
+        $encryptionModule = $this->getEncryptionModule($path);
+        if ($encryptionModule) {
+            $this->keyStorage->deleteAllFileKeys($fullPath);
+        }
+
+        return $this->storage->unlink($path);
+    }
+
+    public function rename(string $source, string $target): bool {
+        $result = $this->storage->rename($source, $target);
+
+        if ($result &&
+            // versions always use the keys from the original file, so we can skip
+            // this step for versions
+            $this->isVersion($target) === false &&
+            $this->encryptionManager->isEnabled()) {
+            $sourcePath = $this->getFullPath($source);
+            if (!$this->util->isExcluded($sourcePath)) {
+                $targetPath = $this->getFullPath($target);
+                if (isset($this->unencryptedSize[$sourcePath])) {
+                    $this->unencryptedSize[$targetPath] = $this->unencryptedSize[$sourcePath];
+                }
+                $this->keyStorage->renameKeys($sourcePath, $targetPath);
+                $module = $this->getEncryptionModule($target);
+                if ($module) {
+                    $module->update($targetPath, $this->uid, []);
+                }
+            }
+        }
+
+        return $result;
+    }
+
+    public function rmdir(string $path): bool {
+        $result = $this->storage->rmdir($path);
+        $fullPath = $this->getFullPath($path);
+        if ($result &&
+            $this->util->isExcluded($fullPath) === false &&
+            $this->encryptionManager->isEnabled()
+        ) {
+            $this->keyStorage->deleteAllFileKeys($fullPath);
+        }
+
+        return $result;
+    }
+
+    public function isReadable(string $path): bool {
+        $isReadable = true;
+
+        $metaData = $this->getMetaData($path);
+        if (
+            !$this->is_dir($path) &&
+            isset($metaData['encrypted']) &&
+            $metaData['encrypted'] === true
+        ) {
+            $fullPath = $this->getFullPath($path);
+            $module = $this->getEncryptionModule($path);
+            $isReadable = $module->isReadable($fullPath, $this->uid);
+        }
+
+        return $this->storage->isReadable($path) && $isReadable;
+    }
+
+    public function copy(string $source, string $target): bool {
+        $sourcePath = $this->getFullPath($source);
+
+        if ($this->util->isExcluded($sourcePath)) {
+            return $this->storage->copy($source, $target);
+        }
+
+        // need to stream copy file by file in case we copy between a encrypted
+        // and a unencrypted storage
+        $this->unlink($target);
+        return $this->copyFromStorage($this, $source, $target);
+    }
+
+    public function fopen(string $path, string $mode) {
+        // check if the file is stored in the array cache, this means that we
+        // copy a file over to the versions folder, in this case we don't want to
+        // decrypt it
+        if ($this->arrayCache->hasKey('encryption_copy_version_' . $path)) {
+            $this->arrayCache->remove('encryption_copy_version_' . $path);
+            return $this->storage->fopen($path, $mode);
+        }
+
+        if (!$this->enabled) {
+            return $this->storage->fopen($path, $mode);
+        }
+
+        $encryptionEnabled = $this->encryptionManager->isEnabled();
+        $shouldEncrypt = false;
+        $encryptionModule = null;
+        $header = $this->getHeader($path);
+        $signed = isset($header['signed']) && $header['signed'] === 'true';
+        $fullPath = $this->getFullPath($path);
+        $encryptionModuleId = $this->util->getEncryptionModuleId($header);
+
+        if ($this->util->isExcluded($fullPath) === false) {
+            $size = $unencryptedSize = 0;
+            $realFile = $this->util->stripPartialFileExtension($path);
+            $targetExists = $this->is_file($realFile) || $this->file_exists($path);
+            $targetIsEncrypted = false;
+            if ($targetExists) {
+                // in case the file exists we require the explicit module as
+                // specified in the file header - otherwise we need to fail hard to
+                // prevent data loss on client side
+                if (!empty($encryptionModuleId)) {
+                    $targetIsEncrypted = true;
+                    $encryptionModule = $this->encryptionManager->getEncryptionModule($encryptionModuleId);
+                }
+
+                if ($this->file_exists($path)) {
+                    $size = $this->storage->filesize($path);
+                    $unencryptedSize = $this->filesize($path);
+                } else {
+                    $size = $unencryptedSize = 0;
+                }
+            }
+
+            try {
+                if (
+                    $mode === 'w'
+                    || $mode === 'w+'
+                    || $mode === 'wb'
+                    || $mode === 'wb+'
+                ) {
+                    // if we update a encrypted file with a un-encrypted one we change the db flag
+                    if ($targetIsEncrypted && $encryptionEnabled === false) {
+                        $cache = $this->storage->getCache();
+                        $entry = $cache->get($path);
+                        $cache->update($entry->getId(), ['encrypted' => 0]);
+                    }
+                    if ($encryptionEnabled) {
+                        // if $encryptionModuleId is empty, the default module will be used
+                        $encryptionModule = $this->encryptionManager->getEncryptionModule($encryptionModuleId);
+                        $shouldEncrypt = $encryptionModule->shouldEncrypt($fullPath);
+                        $signed = true;
+                    }
+                } else {
+                    $info = $this->getCache()->get($path);
+                    // only get encryption module if we found one in the header
+                    // or if file should be encrypted according to the file cache
+                    if (!empty($encryptionModuleId)) {
+                        $encryptionModule = $this->encryptionManager->getEncryptionModule($encryptionModuleId);
+                        $shouldEncrypt = true;
+                    } elseif ($info !== false && $info['encrypted'] === true) {
+                        // we come from a old installation. No header and/or no module defined
+                        // but the file is encrypted. In this case we need to use the
+                        // OC_DEFAULT_MODULE to read the file
+                        $encryptionModule = $this->encryptionManager->getEncryptionModule('OC_DEFAULT_MODULE');
+                        $shouldEncrypt = true;
+                        $targetIsEncrypted = true;
+                    }
+                }
+            } catch (ModuleDoesNotExistsException $e) {
+                $this->logger->warning('Encryption module "' . $encryptionModuleId . '" not found, file will be stored unencrypted', [
+                    'exception' => $e,
+                    'app' => 'core',
+                ]);
+            }
+
+            // encryption disabled on write of new file and write to existing unencrypted file -> don't encrypt
+            if (!$encryptionEnabled || !$this->shouldEncrypt($path)) {
+                if (!$targetExists || !$targetIsEncrypted) {
+                    $shouldEncrypt = false;
+                }
+            }
+
+            if ($shouldEncrypt === true && $encryptionModule !== null) {
+                $this->encryptedPaths->set($this->util->stripPartialFileExtension($path), true);
+                $headerSize = $this->getHeaderSize($path);
+                if ($mode === 'r' && $headerSize === 0) {
+                    $firstBlock = $this->readFirstBlock($path);
+                    if (!$firstBlock) {
+                        throw new InvalidHeaderException("Unable to get header block for $path");
+                    } elseif (!str_starts_with($firstBlock, Util::HEADER_START)) {
+                        throw new InvalidHeaderException("Unable to get header size for $path, file doesn't start with encryption header");
+                    } else {
+                        throw new InvalidHeaderException("Unable to get header size for $path, even though file does start with encryption header");
+                    }
+                }
+                $source = $this->storage->fopen($path, $mode);
+                if (!is_resource($source)) {
+                    return false;
+                }
+                $handle = \OC\Files\Stream\Encryption::wrap($source, $path, $fullPath, $header,
+                    $this->uid, $encryptionModule, $this->storage, $this, $this->util, $this->fileHelper, $mode,
+                    $size, $unencryptedSize, $headerSize, $signed);
+
+                return $handle;
+            }
+        }
+
+        return $this->storage->fopen($path, $mode);
+    }
+
+
+    /**
+     * perform some plausibility checks if the unencrypted size is correct.
+     * If not, we calculate the correct unencrypted size and return it
+     *
+     * @param string $path internal path relative to the storage root
+     * @param int $unencryptedSize size of the unencrypted file
+     *
+     * @return int unencrypted size
+     */
+    protected function verifyUnencryptedSize(string $path, int $unencryptedSize): int {
+        $size = $this->storage->filesize($path);
+        $result = $unencryptedSize;
+
+        if ($unencryptedSize < 0 ||
+            ($size > 0 && $unencryptedSize === $size) ||
+            $unencryptedSize > $size
+        ) {
+            // check if we already calculate the unencrypted size for the
+            // given path to avoid recursions
+            if (isset($this->fixUnencryptedSizeOf[$this->getFullPath($path)]) === false) {
+                $this->fixUnencryptedSizeOf[$this->getFullPath($path)] = true;
+                try {
+                    $result = $this->fixUnencryptedSize($path, $size, $unencryptedSize);
+                } catch (\Exception $e) {
+                    $this->logger->error('Couldn\'t re-calculate unencrypted size for ' . $path, ['exception' => $e]);
+                }
+                unset($this->fixUnencryptedSizeOf[$this->getFullPath($path)]);
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * calculate the unencrypted size
+     *
+     * @param string $path internal path relative to the storage root
+     * @param int $size size of the physical file
+     * @param int $unencryptedSize size of the unencrypted file
+     */
+    protected function fixUnencryptedSize(string $path, int $size, int $unencryptedSize): int|float {
+        $headerSize = $this->getHeaderSize($path);
+        $header = $this->getHeader($path);
+        $encryptionModule = $this->getEncryptionModule($path);
+
+        $stream = $this->storage->fopen($path, 'r');
+
+        // if we couldn't open the file we return the old unencrypted size
+        if (!is_resource($stream)) {
+            $this->logger->error('Could not open ' . $path . '. Recalculation of unencrypted size aborted.');
+            return $unencryptedSize;
+        }
+
+        $newUnencryptedSize = 0;
+        $size -= $headerSize;
+        $blockSize = $this->util->getBlockSize();
+
+        // if a header exists we skip it
+        if ($headerSize > 0) {
+            $this->fread_block($stream, $headerSize);
+        }
+
+        // fast path, else the calculation for $lastChunkNr is bogus
+        if ($size === 0) {
+            return 0;
+        }
+
+        $signed = isset($header['signed']) && $header['signed'] === 'true';
+        $unencryptedBlockSize = $encryptionModule->getUnencryptedBlockSize($signed);
+
+        // calculate last chunk nr
+        // next highest is end of chunks, one subtracted is last one
+        // we have to read the last chunk, we can't just calculate it (because of padding etc)
+
+        $lastChunkNr = ceil($size / $blockSize) - 1;
+        // calculate last chunk position
+        $lastChunkPos = ($lastChunkNr * $blockSize);
+        // try to fseek to the last chunk, if it fails we have to read the whole file
+        if (@fseek($stream, $lastChunkPos, SEEK_CUR) === 0) {
+            $newUnencryptedSize += $lastChunkNr * $unencryptedBlockSize;
+        }
+
+        $lastChunkContentEncrypted = '';
+        $count = $blockSize;
+
+        while ($count > 0) {
+            $data = $this->fread_block($stream, $blockSize);
+            $count = strlen($data);
+            $lastChunkContentEncrypted .= $data;
+            if (strlen($lastChunkContentEncrypted) > $blockSize) {
+                $newUnencryptedSize += $unencryptedBlockSize;
+                $lastChunkContentEncrypted = substr($lastChunkContentEncrypted, $blockSize);
+            }
+        }
+
+        fclose($stream);
+
+        // we have to decrypt the last chunk to get it actual size
+        $encryptionModule->begin($this->getFullPath($path), $this->uid, 'r', $header, []);
+        $decryptedLastChunk = $encryptionModule->decrypt($lastChunkContentEncrypted, $lastChunkNr . 'end');
+        $decryptedLastChunk .= $encryptionModule->end($this->getFullPath($path), $lastChunkNr . 'end');
+
+        // calc the real file size with the size of the last chunk
+        $newUnencryptedSize += strlen($decryptedLastChunk);
+
+        $this->updateUnencryptedSize($this->getFullPath($path), $newUnencryptedSize);
+
+        // write to cache if applicable
+        $cache = $this->storage->getCache();
+        $entry = $cache->get($path);
+        $cache->update($entry['fileid'], [
+            'unencrypted_size' => $newUnencryptedSize
+        ]);
+
+        return $newUnencryptedSize;
+    }
+
+    /**
+     * fread_block
+     *
+     * This function is a wrapper around the fread function.  It is based on the
+     * stream_read_block function from lib/private/Files/Streams/Encryption.php
+     * It calls stream read until the requested $blockSize was received or no remaining data is present.
+     * This is required as stream_read only returns smaller chunks of data when the stream fetches from a
+     * remote storage over the internet and it does not care about the given $blockSize.
+     *
+     * @param resource $handle the stream to read from
+     * @param int $blockSize Length of requested data block in bytes
+     * @return string Data fetched from stream.
+     */
+    private function fread_block($handle, int $blockSize): string {
+        $remaining = $blockSize;
+        $data = '';
+
+        do {
+            $chunk = fread($handle, $remaining);
+            $chunk_len = strlen($chunk);
+            $data .= $chunk;
+            $remaining -= $chunk_len;
+        } while (($remaining > 0) && ($chunk_len > 0));
+
+        return $data;
+    }
+
+    public function moveFromStorage(
+        Storage\IStorage $sourceStorage,
+        string $sourceInternalPath,
+        string $targetInternalPath,
+        $preserveMtime = true,
+    ): bool {
+        if ($sourceStorage === $this) {
+            return $this->rename($sourceInternalPath, $targetInternalPath);
+        }
+
+        // TODO clean this up once the underlying moveFromStorage in OC\Files\Storage\Wrapper\Common is fixed:
+        // - call $this->storage->moveFromStorage() instead of $this->copyBetweenStorage
+        // - copy the file cache update from  $this->copyBetweenStorage to this method
+        // - copy the copyKeys() call from  $this->copyBetweenStorage to this method
+        // - remove $this->copyBetweenStorage
+
+        if (!$sourceStorage->isDeletable($sourceInternalPath)) {
+            return false;
+        }
+
+        $result = $this->copyBetweenStorage($sourceStorage, $sourceInternalPath, $targetInternalPath, $preserveMtime, true);
+        if ($result) {
+            $setPreserveCacheOnDelete = $sourceStorage->instanceOfStorage(ObjectStoreStorage::class) && !$this->instanceOfStorage(ObjectStoreStorage::class);
+            if ($setPreserveCacheOnDelete) {
+                /** @var ObjectStoreStorage $sourceStorage */
+                $sourceStorage->setPreserveCacheOnDelete(true);
+            }
+            try {
+                if ($sourceStorage->is_dir($sourceInternalPath)) {
+                    $result = $sourceStorage->rmdir($sourceInternalPath);
+                } else {
+                    $result = $sourceStorage->unlink($sourceInternalPath);
+                }
+            } finally {
+                if ($setPreserveCacheOnDelete) {
+                    /** @var ObjectStoreStorage $sourceStorage */
+                    $sourceStorage->setPreserveCacheOnDelete(false);
+                }
+            }
+        }
+        return $result;
+    }
+
+    public function copyFromStorage(
+        Storage\IStorage $sourceStorage,
+        string $sourceInternalPath,
+        string $targetInternalPath,
+        $preserveMtime = false,
+        $isRename = false,
+    ): bool {
+        // TODO clean this up once the underlying moveFromStorage in OC\Files\Storage\Wrapper\Common is fixed:
+        // - call $this->storage->copyFromStorage() instead of $this->copyBetweenStorage
+        // - copy the file cache update from  $this->copyBetweenStorage to this method
+        // - copy the copyKeys() call from  $this->copyBetweenStorage to this method
+        // - remove $this->copyBetweenStorage
+
+        return $this->copyBetweenStorage($sourceStorage, $sourceInternalPath, $targetInternalPath, $preserveMtime, $isRename);
+    }
+
+    /**
+     * Update the encrypted cache version in the database
+     */
+    private function updateEncryptedVersion(
+        Storage\IStorage $sourceStorage,
+        string $sourceInternalPath,
+        string $targetInternalPath,
+        bool $isRename,
+        bool $keepEncryptionVersion,
+    ): void {
+        $isEncrypted = $this->encryptionManager->isEnabled() && $this->shouldEncrypt($targetInternalPath);
+        $cacheInformation = [
+            'encrypted' => $isEncrypted,
+        ];
+        if ($isEncrypted) {
+            $sourceCacheEntry = $sourceStorage->getCache()->get($sourceInternalPath);
+            $targetCacheEntry = $this->getCache()->get($targetInternalPath);
+
+            // Rename of the cache already happened, so we do the cleanup on the target
+            if ($sourceCacheEntry === false && $targetCacheEntry !== false) {
+                $encryptedVersion = $targetCacheEntry['encryptedVersion'];
+                $isRename = false;
+            } else {
+                $encryptedVersion = $sourceCacheEntry['encryptedVersion'];
+            }
+
+            // In case of a move operation from an unencrypted to an encrypted
+            // storage the old encrypted version would stay with "0" while the
+            // correct value would be "1". Thus we manually set the value to "1"
+            // for those cases.
+            // See also https://github.com/owncloud/core/issues/23078
+            if ($encryptedVersion === 0 || !$keepEncryptionVersion) {
+                $encryptedVersion = 1;
+            }
+
+            $cacheInformation['encryptedVersion'] = $encryptedVersion;
+        }
+
+        // in case of a rename we need to manipulate the source cache because
+        // this information will be kept for the new target
+        if ($isRename) {
+            $sourceStorage->getCache()->put($sourceInternalPath, $cacheInformation);
+        } else {
+            $this->getCache()->put($targetInternalPath, $cacheInformation);
+        }
+    }
+
+    /**
+     * copy file between two storages
+     * @throws \Exception
+     */
+    private function copyBetweenStorage(
+        Storage\IStorage $sourceStorage,
+        string $sourceInternalPath,
+        string $targetInternalPath,
+        bool $preserveMtime,
+        bool $isRename,
+    ): bool {
+        // for versions we have nothing to do, because versions should always use the
+        // key from the original file. Just create a 1:1 copy and done
+        if ($this->isVersion($targetInternalPath) ||
+            $this->isVersion($sourceInternalPath)) {
+            // remember that we try to create a version so that we can detect it during
+            // fopen($sourceInternalPath) and by-pass the encryption in order to
+            // create a 1:1 copy of the file
+            $this->arrayCache->set('encryption_copy_version_' . $sourceInternalPath, true);
+            $result = $this->storage->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
+            $this->arrayCache->remove('encryption_copy_version_' . $sourceInternalPath);
+            if ($result) {
+                $info = $this->getCache('', $sourceStorage)->get($sourceInternalPath);
+                // make sure that we update the unencrypted size for the version
+                if (isset($info['encrypted']) && $info['encrypted'] === true) {
+                    $this->updateUnencryptedSize(
+                        $this->getFullPath($targetInternalPath),
+                        $info->getUnencryptedSize()
+                    );
+                }
+                $this->updateEncryptedVersion($sourceStorage, $sourceInternalPath, $targetInternalPath, $isRename, true);
+            }
+            return $result;
+        }
+
+        // first copy the keys that we reuse the existing file key on the target location
+        // and don't create a new one which would break versions for example.
+        if ($sourceStorage->instanceOfStorage(Common::class) && $sourceStorage->getMountOption('mount_point')) {
+            $mountPoint = $sourceStorage->getMountOption('mount_point');
+            $source = $mountPoint . '/' . $sourceInternalPath;
+            $target = $this->getFullPath($targetInternalPath);
+            $this->copyKeys($source, $target);
+        } else {
+            $this->logger->error('Could not find mount point, can\'t keep encryption keys');
+        }
+
+        if ($sourceStorage->is_dir($sourceInternalPath)) {
+            $dh = $sourceStorage->opendir($sourceInternalPath);
+            if (!$this->is_dir($targetInternalPath)) {
+                $result = $this->mkdir($targetInternalPath);
+            } else {
+                $result = true;
+            }
+            if (is_resource($dh)) {
+                while ($result && ($file = readdir($dh)) !== false) {
+                    if (!Filesystem::isIgnoredDir($file)) {
+                        $result = $this->copyFromStorage($sourceStorage, $sourceInternalPath . '/' . $file, $targetInternalPath . '/' . $file, $preserveMtime, $isRename);
+                    }
+                }
+            }
+        } else {
+            try {
+                $source = $sourceStorage->fopen($sourceInternalPath, 'r');
+                $target = $this->fopen($targetInternalPath, 'w');
+                [, $result] = Files::streamCopy($source, $target, true);
+            } finally {
+                if (is_resource($source)) {
+                    fclose($source);
+                }
+                if (is_resource($target)) {
+                    fclose($target);
+                }
+            }
+            if ($result) {
+                if ($preserveMtime) {
+                    $this->touch($targetInternalPath, $sourceStorage->filemtime($sourceInternalPath));
+                }
+                $this->updateEncryptedVersion($sourceStorage, $sourceInternalPath, $targetInternalPath, $isRename, false);
+            } else {
+                // delete partially written target file
+                $this->unlink($targetInternalPath);
+                // delete cache entry that was created by fopen
+                $this->getCache()->remove($targetInternalPath);
+            }
+        }
+        return (bool)$result;
+    }
+
+    public function getLocalFile(string $path): string|false {
+        if ($this->encryptionManager->isEnabled()) {
+            $cachedFile = $this->getCachedFile($path);
+            if (is_string($cachedFile)) {
+                return $cachedFile;
+            }
+        }
+        return $this->storage->getLocalFile($path);
+    }
+
+    public function isLocal(): bool {
+        if ($this->encryptionManager->isEnabled()) {
+            return false;
+        }
+        return $this->storage->isLocal();
+    }
+
+    public function stat(string $path): array|false {
+        $stat = $this->storage->stat($path);
+        if (!$stat) {
+            return false;
+        }
+        $fileSize = $this->filesize($path);
+        $stat['size'] = $fileSize;
+        $stat[7] = $fileSize;
+        $stat['hasHeader'] = $this->getHeaderSize($path) > 0;
+        return $stat;
+    }
+
+    public function hash(string $type, string $path, bool $raw = false): string|false {
+        $fh = $this->fopen($path, 'rb');
+        $ctx = hash_init($type);
+        hash_update_stream($ctx, $fh);
+        fclose($fh);
+        return hash_final($ctx, $raw);
+    }
+
+    /**
+     * return full path, including mount point
+     *
+     * @param string $path relative to mount point
+     * @return string full path including mount point
+     */
+    protected function getFullPath(string $path): string {
+        return Filesystem::normalizePath($this->mountPoint . '/' . $path);
+    }
+
+    /**
+     * read first block of encrypted file, typically this will contain the
+     * encryption header
+     */
+    protected function readFirstBlock(string $path): string {
+        $firstBlock = '';
+        if ($this->storage->is_file($path)) {
+            $handle = $this->storage->fopen($path, 'r');
+            $firstBlock = fread($handle, $this->util->getHeaderSize());
+            fclose($handle);
+        }
+        return $firstBlock;
+    }
+
+    /**
+     * return header size of given file
+     */
+    protected function getHeaderSize(string $path): int {
+        $headerSize = 0;
+        $realFile = $this->util->stripPartialFileExtension($path);
+        if ($this->storage->is_file($realFile)) {
+            $path = $realFile;
+        }
+        $firstBlock = $this->readFirstBlock($path);
+
+        if (str_starts_with($firstBlock, Util::HEADER_START)) {
+            $headerSize = $this->util->getHeaderSize();
+        }
+
+        return $headerSize;
+    }
+
+    /**
+     * read header from file
+     */
+    protected function getHeader(string $path): array {
+        $realFile = $this->util->stripPartialFileExtension($path);
+        $exists = $this->storage->is_file($realFile);
+        if ($exists) {
+            $path = $realFile;
+        }
+
+        $result = [];
+
+        $isEncrypted = $this->encryptedPaths->get($realFile);
+        if (is_null($isEncrypted)) {
+            $info = $this->getCache()->get($path);
+            $isEncrypted = isset($info['encrypted']) && $info['encrypted'] === true;
+        }
+
+        if ($isEncrypted) {
+            $firstBlock = $this->readFirstBlock($path);
+            $result = $this->util->parseRawHeader($firstBlock);
+
+            // if the header doesn't contain a encryption module we check if it is a
+            // legacy file. If true, we add the default encryption module
+            if (!isset($result[Util::HEADER_ENCRYPTION_MODULE_KEY]) && (!empty($result) || $exists)) {
+                $result[Util::HEADER_ENCRYPTION_MODULE_KEY] = 'OC_DEFAULT_MODULE';
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * read encryption module needed to read/write the file located at $path
+     *
+     * @throws ModuleDoesNotExistsException
+     * @throws \Exception
+     */
+    protected function getEncryptionModule(string $path): ?\OCP\Encryption\IEncryptionModule {
+        $encryptionModule = null;
+        $header = $this->getHeader($path);
+        $encryptionModuleId = $this->util->getEncryptionModuleId($header);
+        if (!empty($encryptionModuleId)) {
+            try {
+                $encryptionModule = $this->encryptionManager->getEncryptionModule($encryptionModuleId);
+            } catch (ModuleDoesNotExistsException $e) {
+                $this->logger->critical('Encryption module defined in "' . $path . '" not loaded!');
+                throw $e;
+            }
+        }
+
+        return $encryptionModule;
+    }
+
+    public function updateUnencryptedSize(string $path, int|float $unencryptedSize): void {
+        $this->unencryptedSize[$path] = $unencryptedSize;
+    }
+
+    /**
+     * copy keys to new location
+     *
+     * @param string $source path relative to data/
+     * @param string $target path relative to data/
+     */
+    protected function copyKeys(string $source, string $target): bool {
+        if (!$this->util->isExcluded($source)) {
+            return $this->keyStorage->copyKeys($source, $target);
+        }
+
+        return false;
+    }
+
+    /**
+     * check if path points to a files version
+     */
+    protected function isVersion(string $path): bool {
+        $normalized = Filesystem::normalizePath($path);
+        return substr($normalized, 0, strlen('/files_versions/')) === '/files_versions/';
+    }
+
+    /**
+     * check if the given storage should be encrypted or not
+     */
+    protected function shouldEncrypt(string $path): bool {
+        $fullPath = $this->getFullPath($path);
+        $mountPointConfig = $this->mount->getOption('encrypt', true);
+        if ($mountPointConfig === false) {
+            return false;
+        }
+
+        try {
+            $encryptionModule = $this->getEncryptionModule($fullPath);
+        } catch (ModuleDoesNotExistsException $e) {
+            return false;
+        }
+
+        if ($encryptionModule === null) {
+            $encryptionModule = $this->encryptionManager->getEncryptionModule();
+        }
+
+        return $encryptionModule->shouldEncrypt($fullPath);
+    }
+
+    public function writeStream(string $path, $stream, ?int $size = null): int {
+        // always fall back to fopen
+        $target = $this->fopen($path, 'w');
+        [$count, $result] = Files::streamCopy($stream, $target, true);
+        fclose($stream);
+        fclose($target);
+
+        // object store, stores the size after write and doesn't update this during scan
+        // manually store the unencrypted size
+        if ($result && $this->getWrapperStorage()->instanceOfStorage(ObjectStoreStorage::class) && $this->shouldEncrypt($path)) {
+            $this->getCache()->put($path, ['unencrypted_size' => $count]);
+        }
+
+        return $count;
+    }
+
+    public function clearIsEncryptedCache(): void {
+        $this->encryptedPaths->clear();
+    }
+
+    /**
+     * Allow temporarily disabling the wrapper
+     */
+    public function setEnabled(bool $enabled): void {
+        $this->enabled = $enabled;
+    }
+
+    /**
+     * Check if the on-disk data for a file has a valid encrypted header
+     *
+     * @param string $path
+     * @return bool
+     */
+    public function hasValidHeader(string $path): bool {
+        $firstBlock = $this->readFirstBlock($path);
+        $header = $this->util->parseRawHeader($firstBlock);
+        return (count($header) > 0);
+    }
 }

lib/private/Files/Storage/LocalTempFileTrait.php

Indentation +27 added lines, -27 removed lines

@@ -21,34 +21,34 @@
  * in classes which extend it, e.g. $this->stat() .
  */
 trait LocalTempFileTrait {
-	/** @var array<string,string|false> */
-	protected array $cachedFiles = [];
+    /** @var array<string,string|false> */
+    protected array $cachedFiles = [];
 
-	protected function getCachedFile(string $path): string|false {
-		if (!isset($this->cachedFiles[$path])) {
-			$this->cachedFiles[$path] = $this->toTmpFile($path);
-		}
-		return $this->cachedFiles[$path];
-	}
+    protected function getCachedFile(string $path): string|false {
+        if (!isset($this->cachedFiles[$path])) {
+            $this->cachedFiles[$path] = $this->toTmpFile($path);
+        }
+        return $this->cachedFiles[$path];
+    }
 
-	protected function removeCachedFile(string $path): void {
-		unset($this->cachedFiles[$path]);
-	}
+    protected function removeCachedFile(string $path): void {
+        unset($this->cachedFiles[$path]);
+    }
 
-	protected function toTmpFile(string $path): string|false { //no longer in the storage api, still useful here
-		$source = $this->fopen($path, 'r');
-		if (!$source) {
-			return false;
-		}
-		if ($pos = strrpos($path, '.')) {
-			$extension = substr($path, $pos);
-		} else {
-			$extension = '';
-		}
-		$tmpFile = \OC::$server->getTempManager()->getTemporaryFile($extension);
-		$target = fopen($tmpFile, 'w');
-		Files::streamCopy($source, $target);
-		fclose($target);
-		return $tmpFile;
-	}
+    protected function toTmpFile(string $path): string|false { //no longer in the storage api, still useful here
+        $source = $this->fopen($path, 'r');
+        if (!$source) {
+            return false;
+        }
+        if ($pos = strrpos($path, '.')) {
+            $extension = substr($path, $pos);
+        } else {
+            $extension = '';
+        }
+        $tmpFile = \OC::$server->getTempManager()->getTemporaryFile($extension);
+        $target = fopen($tmpFile, 'w');
+        Files::streamCopy($source, $target);
+        fclose($target);
+        return $tmpFile;
+    }
 }

lib/private/Files/Storage/Common.php

Indentation +714 added lines, -714 removed lines

@@ -52,718 +52,718 @@
  * in classes which extend it, e.g. $this->stat() .
  */
 abstract class Common implements Storage, ILockingStorage, IWriteStreamStorage, IConstructableStorage {
-	use LocalTempFileTrait;
-
-	protected ?Cache $cache = null;
-	protected ?Scanner $scanner = null;
-	protected ?Watcher $watcher = null;
-	protected ?Propagator $propagator = null;
-	protected $storageCache;
-	protected ?Updater $updater = null;
-
-	protected array $mountOptions = [];
-	protected $owner = null;
-
-	private ?bool $shouldLogLocks = null;
-	private ?LoggerInterface $logger = null;
-	private ?IFilenameValidator $filenameValidator = null;
-
-	public function __construct(array $parameters) {
-	}
-
-	protected function remove(string $path): bool {
-		if ($this->file_exists($path)) {
-			if ($this->is_dir($path)) {
-				return $this->rmdir($path);
-			} elseif ($this->is_file($path)) {
-				return $this->unlink($path);
-			}
-		}
-		return false;
-	}
-
-	public function is_dir(string $path): bool {
-		return $this->filetype($path) === 'dir';
-	}
-
-	public function is_file(string $path): bool {
-		return $this->filetype($path) === 'file';
-	}
-
-	public function filesize(string $path): int|float|false {
-		if ($this->is_dir($path)) {
-			return 0; //by definition
-		} else {
-			$stat = $this->stat($path);
-			return isset($stat['size']) ? $stat['size'] : 0;
-		}
-	}
-
-	public function isReadable(string $path): bool {
-		// at least check whether it exists
-		// subclasses might want to implement this more thoroughly
-		return $this->file_exists($path);
-	}
-
-	public function isUpdatable(string $path): bool {
-		// at least check whether it exists
-		// subclasses might want to implement this more thoroughly
-		// a non-existing file/folder isn't updatable
-		return $this->file_exists($path);
-	}
-
-	public function isCreatable(string $path): bool {
-		if ($this->is_dir($path) && $this->isUpdatable($path)) {
-			return true;
-		}
-		return false;
-	}
-
-	public function isDeletable(string $path): bool {
-		if ($path === '' || $path === '/') {
-			return $this->isUpdatable($path);
-		}
-		$parent = dirname($path);
-		return $this->isUpdatable($parent) && $this->isUpdatable($path);
-	}
-
-	public function isSharable(string $path): bool {
-		return $this->isReadable($path);
-	}
-
-	public function getPermissions(string $path): int {
-		$permissions = 0;
-		if ($this->isCreatable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_CREATE;
-		}
-		if ($this->isReadable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_READ;
-		}
-		if ($this->isUpdatable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_UPDATE;
-		}
-		if ($this->isDeletable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_DELETE;
-		}
-		if ($this->isSharable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_SHARE;
-		}
-		return $permissions;
-	}
-
-	public function filemtime(string $path): int|false {
-		$stat = $this->stat($path);
-		if (isset($stat['mtime']) && $stat['mtime'] > 0) {
-			return $stat['mtime'];
-		} else {
-			return 0;
-		}
-	}
-
-	public function file_get_contents(string $path): string|false {
-		$handle = $this->fopen($path, 'r');
-		if (!$handle) {
-			return false;
-		}
-		$data = stream_get_contents($handle);
-		fclose($handle);
-		return $data;
-	}
-
-	public function file_put_contents(string $path, mixed $data): int|float|false {
-		$handle = $this->fopen($path, 'w');
-		if (!$handle) {
-			return false;
-		}
-		$this->removeCachedFile($path);
-		$count = fwrite($handle, $data);
-		fclose($handle);
-		return $count;
-	}
-
-	public function rename(string $source, string $target): bool {
-		$this->remove($target);
-
-		$this->removeCachedFile($source);
-		return $this->copy($source, $target) and $this->remove($source);
-	}
-
-	public function copy(string $source, string $target): bool {
-		if ($this->is_dir($source)) {
-			$this->remove($target);
-			$dir = $this->opendir($source);
-			$this->mkdir($target);
-			while (($file = readdir($dir)) !== false) {
-				if (!Filesystem::isIgnoredDir($file)) {
-					if (!$this->copy($source . '/' . $file, $target . '/' . $file)) {
-						closedir($dir);
-						return false;
-					}
-				}
-			}
-			closedir($dir);
-			return true;
-		} else {
-			$sourceStream = $this->fopen($source, 'r');
-			$targetStream = $this->fopen($target, 'w');
-			[, $result] = Files::streamCopy($sourceStream, $targetStream, true);
-			if (!$result) {
-				Server::get(LoggerInterface::class)->warning("Failed to write data while copying $source to $target");
-			}
-			$this->removeCachedFile($target);
-			return $result;
-		}
-	}
-
-	public function getMimeType(string $path): string|false {
-		if ($this->is_dir($path)) {
-			return 'httpd/unix-directory';
-		} elseif ($this->file_exists($path)) {
-			return \OC::$server->getMimeTypeDetector()->detectPath($path);
-		} else {
-			return false;
-		}
-	}
-
-	public function hash(string $type, string $path, bool $raw = false): string|false {
-		$fh = $this->fopen($path, 'rb');
-		if (!$fh) {
-			return false;
-		}
-		$ctx = hash_init($type);
-		hash_update_stream($ctx, $fh);
-		fclose($fh);
-		return hash_final($ctx, $raw);
-	}
-
-	public function getLocalFile(string $path): string|false {
-		return $this->getCachedFile($path);
-	}
-
-	private function addLocalFolder(string $path, string $target): void {
-		$dh = $this->opendir($path);
-		if (is_resource($dh)) {
-			while (($file = readdir($dh)) !== false) {
-				if (!Filesystem::isIgnoredDir($file)) {
-					if ($this->is_dir($path . '/' . $file)) {
-						mkdir($target . '/' . $file);
-						$this->addLocalFolder($path . '/' . $file, $target . '/' . $file);
-					} else {
-						$tmp = $this->toTmpFile($path . '/' . $file);
-						rename($tmp, $target . '/' . $file);
-					}
-				}
-			}
-		}
-	}
-
-	protected function searchInDir(string $query, string $dir = ''): array {
-		$files = [];
-		$dh = $this->opendir($dir);
-		if (is_resource($dh)) {
-			while (($item = readdir($dh)) !== false) {
-				if (Filesystem::isIgnoredDir($item)) {
-					continue;
-				}
-				if (strstr(strtolower($item), strtolower($query)) !== false) {
-					$files[] = $dir . '/' . $item;
-				}
-				if ($this->is_dir($dir . '/' . $item)) {
-					$files = array_merge($files, $this->searchInDir($query, $dir . '/' . $item));
-				}
-			}
-		}
-		closedir($dh);
-		return $files;
-	}
-
-	/**
-	 * @inheritDoc
-	 * Check if a file or folder has been updated since $time
-	 *
-	 * The method is only used to check if the cache needs to be updated. Storage backends that don't support checking
-	 * the mtime should always return false here. As a result storage implementations that always return false expect
-	 * exclusive access to the backend and will not pick up files that have been added in a way that circumvents
-	 * Nextcloud filesystem.
-	 */
-	public function hasUpdated(string $path, int $time): bool {
-		return $this->filemtime($path) > $time;
-	}
-
-	protected function getCacheDependencies(): CacheDependencies {
-		static $dependencies = null;
-		if (!$dependencies) {
-			$dependencies = Server::get(CacheDependencies::class);
-		}
-		return $dependencies;
-	}
-
-	public function getCache(string $path = '', ?IStorage $storage = null): ICache {
-		if (!$storage) {
-			$storage = $this;
-		}
-		/** @var self $storage */
-		if (!isset($storage->cache)) {
-			$storage->cache = new Cache($storage, $this->getCacheDependencies());
-		}
-		return $storage->cache;
-	}
-
-	public function getScanner(string $path = '', ?IStorage $storage = null): IScanner {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!$storage->instanceOfStorage(self::class)) {
-			throw new \InvalidArgumentException('Storage is not of the correct class');
-		}
-		if (!isset($storage->scanner)) {
-			$storage->scanner = new Scanner($storage);
-		}
-		return $storage->scanner;
-	}
-
-	public function getWatcher(string $path = '', ?IStorage $storage = null): IWatcher {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!isset($this->watcher)) {
-			$this->watcher = new Watcher($storage);
-			$globalPolicy = Server::get(IConfig::class)->getSystemValueInt('filesystem_check_changes', Watcher::CHECK_NEVER);
-			$this->watcher->setPolicy((int)$this->getMountOption('filesystem_check_changes', $globalPolicy));
-		}
-		return $this->watcher;
-	}
-
-	public function getPropagator(?IStorage $storage = null): IPropagator {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!$storage->instanceOfStorage(self::class)) {
-			throw new \InvalidArgumentException('Storage is not of the correct class');
-		}
-		/** @var self $storage */
-		if (!isset($storage->propagator)) {
-			$config = Server::get(IConfig::class);
-			$storage->propagator = new Propagator($storage, \OC::$server->getDatabaseConnection(), ['appdata_' . $config->getSystemValueString('instanceid')]);
-		}
-		return $storage->propagator;
-	}
-
-	public function getUpdater(?IStorage $storage = null): IUpdater {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!$storage->instanceOfStorage(self::class)) {
-			throw new \InvalidArgumentException('Storage is not of the correct class');
-		}
-		/** @var self $storage */
-		if (!isset($storage->updater)) {
-			$storage->updater = new Updater($storage);
-		}
-		return $storage->updater;
-	}
-
-	public function getStorageCache(?IStorage $storage = null): \OC\Files\Cache\Storage {
-		/** @var Cache $cache */
-		$cache = $this->getCache(storage: $storage);
-		return $cache->getStorageCache();
-	}
-
-	public function getOwner(string $path): string|false {
-		if ($this->owner === null) {
-			$this->owner = \OC_User::getUser();
-		}
-
-		return $this->owner;
-	}
-
-	public function getETag(string $path): string|false {
-		return uniqid();
-	}
-
-	/**
-	 * clean a path, i.e. remove all redundant '.' and '..'
-	 * making sure that it can't point to higher than '/'
-	 *
-	 * @param string $path The path to clean
-	 * @return string cleaned path
-	 */
-	public function cleanPath(string $path): string {
-		if (strlen($path) == 0 || $path[0] != '/') {
-			$path = '/' . $path;
-		}
-
-		$output = [];
-		foreach (explode('/', $path) as $chunk) {
-			if ($chunk == '..') {
-				array_pop($output);
-			} elseif ($chunk == '.') {
-			} else {
-				$output[] = $chunk;
-			}
-		}
-		return implode('/', $output);
-	}
-
-	/**
-	 * Test a storage for availability
-	 */
-	public function test(): bool {
-		try {
-			if ($this->stat('')) {
-				return true;
-			}
-			Server::get(LoggerInterface::class)->info('External storage not available: stat() failed');
-			return false;
-		} catch (\Exception $e) {
-			Server::get(LoggerInterface::class)->warning(
-				'External storage not available: ' . $e->getMessage(),
-				['exception' => $e]
-			);
-			return false;
-		}
-	}
-
-	public function free_space(string $path): int|float|false {
-		return \OCP\Files\FileInfo::SPACE_UNKNOWN;
-	}
-
-	public function isLocal(): bool {
-		// the common implementation returns a temporary file by
-		// default, which is not local
-		return false;
-	}
-
-	/**
-	 * Check if the storage is an instance of $class or is a wrapper for a storage that is an instance of $class
-	 */
-	public function instanceOfStorage(string $class): bool {
-		if (ltrim($class, '\\') === 'OC\Files\Storage\Shared') {
-			// FIXME Temporary fix to keep existing checks working
-			$class = '\OCA\Files_Sharing\SharedStorage';
-		}
-		return is_a($this, $class);
-	}
-
-	/**
-	 * A custom storage implementation can return an url for direct download of a give file.
-	 *
-	 * For now the returned array can hold the parameter url - in future more attributes might follow.
-	 */
-	public function getDirectDownload(string $path): array|false {
-		return [];
-	}
-
-	public function verifyPath(string $path, string $fileName): void {
-		$this->getFilenameValidator()
-			->validateFilename($fileName);
-
-		// verify also the path is valid
-		if ($path && $path !== '/' && $path !== '.') {
-			try {
-				$this->verifyPath(dirname($path), basename($path));
-			} catch (InvalidPathException $e) {
-				// Ignore invalid file type exceptions on directories
-				if ($e->getCode() !== FilenameValidator::INVALID_FILE_TYPE) {
-					$l = \OCP\Util::getL10N('lib');
-					throw new InvalidPathException($l->t('Invalid parent path'), previous: $e);
-				}
-			}
-		}
-	}
-
-	/**
-	 * Get the filename validator
-	 * (cached for performance)
-	 */
-	protected function getFilenameValidator(): IFilenameValidator {
-		if ($this->filenameValidator === null) {
-			$this->filenameValidator = Server::get(IFilenameValidator::class);
-		}
-		return $this->filenameValidator;
-	}
-
-	public function setMountOptions(array $options): void {
-		$this->mountOptions = $options;
-	}
-
-	public function getMountOption(string $name, mixed $default = null): mixed {
-		return $this->mountOptions[$name] ?? $default;
-	}
-
-	public function copyFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath, bool $preserveMtime = false): bool {
-		if ($sourceStorage === $this) {
-			return $this->copy($sourceInternalPath, $targetInternalPath);
-		}
-
-		if ($sourceStorage->is_dir($sourceInternalPath)) {
-			$dh = $sourceStorage->opendir($sourceInternalPath);
-			$result = $this->mkdir($targetInternalPath);
-			if (is_resource($dh)) {
-				$result = true;
-				while ($result && ($file = readdir($dh)) !== false) {
-					if (!Filesystem::isIgnoredDir($file)) {
-						$result &= $this->copyFromStorage($sourceStorage, $sourceInternalPath . '/' . $file, $targetInternalPath . '/' . $file);
-					}
-				}
-			}
-		} else {
-			$source = $sourceStorage->fopen($sourceInternalPath, 'r');
-			$result = false;
-			if ($source) {
-				try {
-					$this->writeStream($targetInternalPath, $source);
-					$result = true;
-				} catch (\Exception $e) {
-					Server::get(LoggerInterface::class)->warning('Failed to copy stream to storage', ['exception' => $e]);
-				}
-			}
-
-			if ($result && $preserveMtime) {
-				$mtime = $sourceStorage->filemtime($sourceInternalPath);
-				$this->touch($targetInternalPath, is_int($mtime) ? $mtime : null);
-			}
-
-			if (!$result) {
-				// delete partially written target file
-				$this->unlink($targetInternalPath);
-				// delete cache entry that was created by fopen
-				$this->getCache()->remove($targetInternalPath);
-			}
-		}
-		return (bool)$result;
-	}
-
-	/**
-	 * Check if a storage is the same as the current one, including wrapped storages
-	 */
-	private function isSameStorage(IStorage $storage): bool {
-		while ($storage->instanceOfStorage(Wrapper::class)) {
-			/**
-			 * @var Wrapper $storage
-			 */
-			$storage = $storage->getWrapperStorage();
-		}
-
-		return $storage === $this;
-	}
-
-	public function moveFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
-		if (
-			!$sourceStorage->instanceOfStorage(Encryption::class) &&
-			$this->isSameStorage($sourceStorage)
-		) {
-			// resolve any jailed paths
-			while ($sourceStorage->instanceOfStorage(Jail::class)) {
-				/**
-				 * @var Jail $sourceStorage
-				 */
-				$sourceInternalPath = $sourceStorage->getUnjailedPath($sourceInternalPath);
-				$sourceStorage = $sourceStorage->getUnjailedStorage();
-			}
-
-			return $this->rename($sourceInternalPath, $targetInternalPath);
-		}
-
-		if (!$sourceStorage->isDeletable($sourceInternalPath)) {
-			return false;
-		}
-
-		$result = $this->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath, true);
-		if ($result) {
-			if ($sourceStorage->instanceOfStorage(ObjectStoreStorage::class)) {
-				/** @var ObjectStoreStorage $sourceStorage */
-				$sourceStorage->setPreserveCacheOnDelete(true);
-			}
-			try {
-				if ($sourceStorage->is_dir($sourceInternalPath)) {
-					$result = $sourceStorage->rmdir($sourceInternalPath);
-				} else {
-					$result = $sourceStorage->unlink($sourceInternalPath);
-				}
-			} finally {
-				if ($sourceStorage->instanceOfStorage(ObjectStoreStorage::class)) {
-					/** @var ObjectStoreStorage $sourceStorage */
-					$sourceStorage->setPreserveCacheOnDelete(false);
-				}
-			}
-		}
-		return $result;
-	}
-
-	public function getMetaData(string $path): ?array {
-		if (Filesystem::isFileBlacklisted($path)) {
-			throw new ForbiddenException('Invalid path: ' . $path, false);
-		}
-
-		$permissions = $this->getPermissions($path);
-		if (!$permissions & \OCP\Constants::PERMISSION_READ) {
-			//can't read, nothing we can do
-			return null;
-		}
-
-		$data = [];
-		$data['mimetype'] = $this->getMimeType($path);
-		$data['mtime'] = $this->filemtime($path);
-		if ($data['mtime'] === false) {
-			$data['mtime'] = time();
-		}
-		if ($data['mimetype'] == 'httpd/unix-directory') {
-			$data['size'] = -1; //unknown
-		} else {
-			$data['size'] = $this->filesize($path);
-		}
-		$data['etag'] = $this->getETag($path);
-		$data['storage_mtime'] = $data['mtime'];
-		$data['permissions'] = $permissions;
-		$data['name'] = basename($path);
-
-		return $data;
-	}
-
-	public function acquireLock(string $path, int $type, ILockingProvider $provider): void {
-		$logger = $this->getLockLogger();
-		if ($logger) {
-			$typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
-			$logger->info(
-				sprintf(
-					'acquire %s lock on "%s" on storage "%s"',
-					$typeString,
-					$path,
-					$this->getId()
-				),
-				[
-					'app' => 'locking',
-				]
-			);
-		}
-		try {
-			$provider->acquireLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type, $this->getId() . '::' . $path);
-		} catch (LockedException $e) {
-			$e = new LockedException($e->getPath(), $e, $e->getExistingLock(), $path);
-			if ($logger) {
-				$logger->info($e->getMessage(), ['exception' => $e]);
-			}
-			throw $e;
-		}
-	}
-
-	public function releaseLock(string $path, int $type, ILockingProvider $provider): void {
-		$logger = $this->getLockLogger();
-		if ($logger) {
-			$typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
-			$logger->info(
-				sprintf(
-					'release %s lock on "%s" on storage "%s"',
-					$typeString,
-					$path,
-					$this->getId()
-				),
-				[
-					'app' => 'locking',
-				]
-			);
-		}
-		try {
-			$provider->releaseLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
-		} catch (LockedException $e) {
-			$e = new LockedException($e->getPath(), $e, $e->getExistingLock(), $path);
-			if ($logger) {
-				$logger->info($e->getMessage(), ['exception' => $e]);
-			}
-			throw $e;
-		}
-	}
-
-	public function changeLock(string $path, int $type, ILockingProvider $provider): void {
-		$logger = $this->getLockLogger();
-		if ($logger) {
-			$typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
-			$logger->info(
-				sprintf(
-					'change lock on "%s" to %s on storage "%s"',
-					$path,
-					$typeString,
-					$this->getId()
-				),
-				[
-					'app' => 'locking',
-				]
-			);
-		}
-		try {
-			$provider->changeLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
-		} catch (LockedException $e) {
-			$e = new LockedException($e->getPath(), $e, $e->getExistingLock(), $path);
-			if ($logger) {
-				$logger->info($e->getMessage(), ['exception' => $e]);
-			}
-			throw $e;
-		}
-	}
-
-	private function getLockLogger(): ?LoggerInterface {
-		if (is_null($this->shouldLogLocks)) {
-			$this->shouldLogLocks = Server::get(IConfig::class)->getSystemValueBool('filelocking.debug', false);
-			$this->logger = $this->shouldLogLocks ? Server::get(LoggerInterface::class) : null;
-		}
-		return $this->logger;
-	}
-
-	/**
-	 * @return array [ available, last_checked ]
-	 */
-	public function getAvailability(): array {
-		return $this->getStorageCache()->getAvailability();
-	}
-
-	public function setAvailability(bool $isAvailable): void {
-		$this->getStorageCache()->setAvailability($isAvailable);
-	}
-
-	public function setOwner(?string $user): void {
-		$this->owner = $user;
-	}
-
-	public function needsPartFile(): bool {
-		return true;
-	}
-
-	public function writeStream(string $path, $stream, ?int $size = null): int {
-		$target = $this->fopen($path, 'w');
-		if (!$target) {
-			throw new GenericFileException("Failed to open $path for writing");
-		}
-		try {
-			[$count, $result] = Files::streamCopy($stream, $target, true);
-			if (!$result) {
-				throw new GenericFileException('Failed to copy stream');
-			}
-		} finally {
-			fclose($target);
-			fclose($stream);
-		}
-		return $count;
-	}
-
-	public function getDirectoryContent(string $directory): \Traversable {
-		$dh = $this->opendir($directory);
-
-		if ($dh === false) {
-			throw new StorageNotAvailableException('Directory listing failed');
-		}
-
-		if (is_resource($dh)) {
-			$basePath = rtrim($directory, '/');
-			while (($file = readdir($dh)) !== false) {
-				if (!Filesystem::isIgnoredDir($file)) {
-					$childPath = $basePath . '/' . trim($file, '/');
-					$metadata = $this->getMetaData($childPath);
-					if ($metadata !== null) {
-						yield $metadata;
-					}
-				}
-			}
-		}
-	}
+    use LocalTempFileTrait;
+
+    protected ?Cache $cache = null;
+    protected ?Scanner $scanner = null;
+    protected ?Watcher $watcher = null;
+    protected ?Propagator $propagator = null;
+    protected $storageCache;
+    protected ?Updater $updater = null;
+
+    protected array $mountOptions = [];
+    protected $owner = null;
+
+    private ?bool $shouldLogLocks = null;
+    private ?LoggerInterface $logger = null;
+    private ?IFilenameValidator $filenameValidator = null;
+
+    public function __construct(array $parameters) {
+    }
+
+    protected function remove(string $path): bool {
+        if ($this->file_exists($path)) {
+            if ($this->is_dir($path)) {
+                return $this->rmdir($path);
+            } elseif ($this->is_file($path)) {
+                return $this->unlink($path);
+            }
+        }
+        return false;
+    }
+
+    public function is_dir(string $path): bool {
+        return $this->filetype($path) === 'dir';
+    }
+
+    public function is_file(string $path): bool {
+        return $this->filetype($path) === 'file';
+    }
+
+    public function filesize(string $path): int|float|false {
+        if ($this->is_dir($path)) {
+            return 0; //by definition
+        } else {
+            $stat = $this->stat($path);
+            return isset($stat['size']) ? $stat['size'] : 0;
+        }
+    }
+
+    public function isReadable(string $path): bool {
+        // at least check whether it exists
+        // subclasses might want to implement this more thoroughly
+        return $this->file_exists($path);
+    }
+
+    public function isUpdatable(string $path): bool {
+        // at least check whether it exists
+        // subclasses might want to implement this more thoroughly
+        // a non-existing file/folder isn't updatable
+        return $this->file_exists($path);
+    }
+
+    public function isCreatable(string $path): bool {
+        if ($this->is_dir($path) && $this->isUpdatable($path)) {
+            return true;
+        }
+        return false;
+    }
+
+    public function isDeletable(string $path): bool {
+        if ($path === '' || $path === '/') {
+            return $this->isUpdatable($path);
+        }
+        $parent = dirname($path);
+        return $this->isUpdatable($parent) && $this->isUpdatable($path);
+    }
+
+    public function isSharable(string $path): bool {
+        return $this->isReadable($path);
+    }
+
+    public function getPermissions(string $path): int {
+        $permissions = 0;
+        if ($this->isCreatable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_CREATE;
+        }
+        if ($this->isReadable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_READ;
+        }
+        if ($this->isUpdatable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_UPDATE;
+        }
+        if ($this->isDeletable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_DELETE;
+        }
+        if ($this->isSharable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_SHARE;
+        }
+        return $permissions;
+    }
+
+    public function filemtime(string $path): int|false {
+        $stat = $this->stat($path);
+        if (isset($stat['mtime']) && $stat['mtime'] > 0) {
+            return $stat['mtime'];
+        } else {
+            return 0;
+        }
+    }
+
+    public function file_get_contents(string $path): string|false {
+        $handle = $this->fopen($path, 'r');
+        if (!$handle) {
+            return false;
+        }
+        $data = stream_get_contents($handle);
+        fclose($handle);
+        return $data;
+    }
+
+    public function file_put_contents(string $path, mixed $data): int|float|false {
+        $handle = $this->fopen($path, 'w');
+        if (!$handle) {
+            return false;
+        }
+        $this->removeCachedFile($path);
+        $count = fwrite($handle, $data);
+        fclose($handle);
+        return $count;
+    }
+
+    public function rename(string $source, string $target): bool {
+        $this->remove($target);
+
+        $this->removeCachedFile($source);
+        return $this->copy($source, $target) and $this->remove($source);
+    }
+
+    public function copy(string $source, string $target): bool {
+        if ($this->is_dir($source)) {
+            $this->remove($target);
+            $dir = $this->opendir($source);
+            $this->mkdir($target);
+            while (($file = readdir($dir)) !== false) {
+                if (!Filesystem::isIgnoredDir($file)) {
+                    if (!$this->copy($source . '/' . $file, $target . '/' . $file)) {
+                        closedir($dir);
+                        return false;
+                    }
+                }
+            }
+            closedir($dir);
+            return true;
+        } else {
+            $sourceStream = $this->fopen($source, 'r');
+            $targetStream = $this->fopen($target, 'w');
+            [, $result] = Files::streamCopy($sourceStream, $targetStream, true);
+            if (!$result) {
+                Server::get(LoggerInterface::class)->warning("Failed to write data while copying $source to $target");
+            }
+            $this->removeCachedFile($target);
+            return $result;
+        }
+    }
+
+    public function getMimeType(string $path): string|false {
+        if ($this->is_dir($path)) {
+            return 'httpd/unix-directory';
+        } elseif ($this->file_exists($path)) {
+            return \OC::$server->getMimeTypeDetector()->detectPath($path);
+        } else {
+            return false;
+        }
+    }
+
+    public function hash(string $type, string $path, bool $raw = false): string|false {
+        $fh = $this->fopen($path, 'rb');
+        if (!$fh) {
+            return false;
+        }
+        $ctx = hash_init($type);
+        hash_update_stream($ctx, $fh);
+        fclose($fh);
+        return hash_final($ctx, $raw);
+    }
+
+    public function getLocalFile(string $path): string|false {
+        return $this->getCachedFile($path);
+    }
+
+    private function addLocalFolder(string $path, string $target): void {
+        $dh = $this->opendir($path);
+        if (is_resource($dh)) {
+            while (($file = readdir($dh)) !== false) {
+                if (!Filesystem::isIgnoredDir($file)) {
+                    if ($this->is_dir($path . '/' . $file)) {
+                        mkdir($target . '/' . $file);
+                        $this->addLocalFolder($path . '/' . $file, $target . '/' . $file);
+                    } else {
+                        $tmp = $this->toTmpFile($path . '/' . $file);
+                        rename($tmp, $target . '/' . $file);
+                    }
+                }
+            }
+        }
+    }
+
+    protected function searchInDir(string $query, string $dir = ''): array {
+        $files = [];
+        $dh = $this->opendir($dir);
+        if (is_resource($dh)) {
+            while (($item = readdir($dh)) !== false) {
+                if (Filesystem::isIgnoredDir($item)) {
+                    continue;
+                }
+                if (strstr(strtolower($item), strtolower($query)) !== false) {
+                    $files[] = $dir . '/' . $item;
+                }
+                if ($this->is_dir($dir . '/' . $item)) {
+                    $files = array_merge($files, $this->searchInDir($query, $dir . '/' . $item));
+                }
+            }
+        }
+        closedir($dh);
+        return $files;
+    }
+
+    /**
+     * @inheritDoc
+     * Check if a file or folder has been updated since $time
+     *
+     * The method is only used to check if the cache needs to be updated. Storage backends that don't support checking
+     * the mtime should always return false here. As a result storage implementations that always return false expect
+     * exclusive access to the backend and will not pick up files that have been added in a way that circumvents
+     * Nextcloud filesystem.
+     */
+    public function hasUpdated(string $path, int $time): bool {
+        return $this->filemtime($path) > $time;
+    }
+
+    protected function getCacheDependencies(): CacheDependencies {
+        static $dependencies = null;
+        if (!$dependencies) {
+            $dependencies = Server::get(CacheDependencies::class);
+        }
+        return $dependencies;
+    }
+
+    public function getCache(string $path = '', ?IStorage $storage = null): ICache {
+        if (!$storage) {
+            $storage = $this;
+        }
+        /** @var self $storage */
+        if (!isset($storage->cache)) {
+            $storage->cache = new Cache($storage, $this->getCacheDependencies());
+        }
+        return $storage->cache;
+    }
+
+    public function getScanner(string $path = '', ?IStorage $storage = null): IScanner {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!$storage->instanceOfStorage(self::class)) {
+            throw new \InvalidArgumentException('Storage is not of the correct class');
+        }
+        if (!isset($storage->scanner)) {
+            $storage->scanner = new Scanner($storage);
+        }
+        return $storage->scanner;
+    }
+
+    public function getWatcher(string $path = '', ?IStorage $storage = null): IWatcher {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!isset($this->watcher)) {
+            $this->watcher = new Watcher($storage);
+            $globalPolicy = Server::get(IConfig::class)->getSystemValueInt('filesystem_check_changes', Watcher::CHECK_NEVER);
+            $this->watcher->setPolicy((int)$this->getMountOption('filesystem_check_changes', $globalPolicy));
+        }
+        return $this->watcher;
+    }
+
+    public function getPropagator(?IStorage $storage = null): IPropagator {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!$storage->instanceOfStorage(self::class)) {
+            throw new \InvalidArgumentException('Storage is not of the correct class');
+        }
+        /** @var self $storage */
+        if (!isset($storage->propagator)) {
+            $config = Server::get(IConfig::class);
+            $storage->propagator = new Propagator($storage, \OC::$server->getDatabaseConnection(), ['appdata_' . $config->getSystemValueString('instanceid')]);
+        }
+        return $storage->propagator;
+    }
+
+    public function getUpdater(?IStorage $storage = null): IUpdater {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!$storage->instanceOfStorage(self::class)) {
+            throw new \InvalidArgumentException('Storage is not of the correct class');
+        }
+        /** @var self $storage */
+        if (!isset($storage->updater)) {
+            $storage->updater = new Updater($storage);
+        }
+        return $storage->updater;
+    }
+
+    public function getStorageCache(?IStorage $storage = null): \OC\Files\Cache\Storage {
+        /** @var Cache $cache */
+        $cache = $this->getCache(storage: $storage);
+        return $cache->getStorageCache();
+    }
+
+    public function getOwner(string $path): string|false {
+        if ($this->owner === null) {
+            $this->owner = \OC_User::getUser();
+        }
+
+        return $this->owner;
+    }
+
+    public function getETag(string $path): string|false {
+        return uniqid();
+    }
+
+    /**
+     * clean a path, i.e. remove all redundant '.' and '..'
+     * making sure that it can't point to higher than '/'
+     *
+     * @param string $path The path to clean
+     * @return string cleaned path
+     */
+    public function cleanPath(string $path): string {
+        if (strlen($path) == 0 || $path[0] != '/') {
+            $path = '/' . $path;
+        }
+
+        $output = [];
+        foreach (explode('/', $path) as $chunk) {
+            if ($chunk == '..') {
+                array_pop($output);
+            } elseif ($chunk == '.') {
+            } else {
+                $output[] = $chunk;
+            }
+        }
+        return implode('/', $output);
+    }
+
+    /**
+     * Test a storage for availability
+     */
+    public function test(): bool {
+        try {
+            if ($this->stat('')) {
+                return true;
+            }
+            Server::get(LoggerInterface::class)->info('External storage not available: stat() failed');
+            return false;
+        } catch (\Exception $e) {
+            Server::get(LoggerInterface::class)->warning(
+                'External storage not available: ' . $e->getMessage(),
+                ['exception' => $e]
+            );
+            return false;
+        }
+    }
+
+    public function free_space(string $path): int|float|false {
+        return \OCP\Files\FileInfo::SPACE_UNKNOWN;
+    }
+
+    public function isLocal(): bool {
+        // the common implementation returns a temporary file by
+        // default, which is not local
+        return false;
+    }
+
+    /**
+     * Check if the storage is an instance of $class or is a wrapper for a storage that is an instance of $class
+     */
+    public function instanceOfStorage(string $class): bool {
+        if (ltrim($class, '\\') === 'OC\Files\Storage\Shared') {
+            // FIXME Temporary fix to keep existing checks working
+            $class = '\OCA\Files_Sharing\SharedStorage';
+        }
+        return is_a($this, $class);
+    }
+
+    /**
+     * A custom storage implementation can return an url for direct download of a give file.
+     *
+     * For now the returned array can hold the parameter url - in future more attributes might follow.
+     */
+    public function getDirectDownload(string $path): array|false {
+        return [];
+    }
+
+    public function verifyPath(string $path, string $fileName): void {
+        $this->getFilenameValidator()
+            ->validateFilename($fileName);
+
+        // verify also the path is valid
+        if ($path && $path !== '/' && $path !== '.') {
+            try {
+                $this->verifyPath(dirname($path), basename($path));
+            } catch (InvalidPathException $e) {
+                // Ignore invalid file type exceptions on directories
+                if ($e->getCode() !== FilenameValidator::INVALID_FILE_TYPE) {
+                    $l = \OCP\Util::getL10N('lib');
+                    throw new InvalidPathException($l->t('Invalid parent path'), previous: $e);
+                }
+            }
+        }
+    }
+
+    /**
+     * Get the filename validator
+     * (cached for performance)
+     */
+    protected function getFilenameValidator(): IFilenameValidator {
+        if ($this->filenameValidator === null) {
+            $this->filenameValidator = Server::get(IFilenameValidator::class);
+        }
+        return $this->filenameValidator;
+    }
+
+    public function setMountOptions(array $options): void {
+        $this->mountOptions = $options;
+    }
+
+    public function getMountOption(string $name, mixed $default = null): mixed {
+        return $this->mountOptions[$name] ?? $default;
+    }
+
+    public function copyFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath, bool $preserveMtime = false): bool {
+        if ($sourceStorage === $this) {
+            return $this->copy($sourceInternalPath, $targetInternalPath);
+        }
+
+        if ($sourceStorage->is_dir($sourceInternalPath)) {
+            $dh = $sourceStorage->opendir($sourceInternalPath);
+            $result = $this->mkdir($targetInternalPath);
+            if (is_resource($dh)) {
+                $result = true;
+                while ($result && ($file = readdir($dh)) !== false) {
+                    if (!Filesystem::isIgnoredDir($file)) {
+                        $result &= $this->copyFromStorage($sourceStorage, $sourceInternalPath . '/' . $file, $targetInternalPath . '/' . $file);
+                    }
+                }
+            }
+        } else {
+            $source = $sourceStorage->fopen($sourceInternalPath, 'r');
+            $result = false;
+            if ($source) {
+                try {
+                    $this->writeStream($targetInternalPath, $source);
+                    $result = true;
+                } catch (\Exception $e) {
+                    Server::get(LoggerInterface::class)->warning('Failed to copy stream to storage', ['exception' => $e]);
+                }
+            }
+
+            if ($result && $preserveMtime) {
+                $mtime = $sourceStorage->filemtime($sourceInternalPath);
+                $this->touch($targetInternalPath, is_int($mtime) ? $mtime : null);
+            }
+
+            if (!$result) {
+                // delete partially written target file
+                $this->unlink($targetInternalPath);
+                // delete cache entry that was created by fopen
+                $this->getCache()->remove($targetInternalPath);
+            }
+        }
+        return (bool)$result;
+    }
+
+    /**
+     * Check if a storage is the same as the current one, including wrapped storages
+     */
+    private function isSameStorage(IStorage $storage): bool {
+        while ($storage->instanceOfStorage(Wrapper::class)) {
+            /**
+             * @var Wrapper $storage
+             */
+            $storage = $storage->getWrapperStorage();
+        }
+
+        return $storage === $this;
+    }
+
+    public function moveFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
+        if (
+            !$sourceStorage->instanceOfStorage(Encryption::class) &&
+            $this->isSameStorage($sourceStorage)
+        ) {
+            // resolve any jailed paths
+            while ($sourceStorage->instanceOfStorage(Jail::class)) {
+                /**
+                 * @var Jail $sourceStorage
+                 */
+                $sourceInternalPath = $sourceStorage->getUnjailedPath($sourceInternalPath);
+                $sourceStorage = $sourceStorage->getUnjailedStorage();
+            }
+
+            return $this->rename($sourceInternalPath, $targetInternalPath);
+        }
+
+        if (!$sourceStorage->isDeletable($sourceInternalPath)) {
+            return false;
+        }
+
+        $result = $this->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath, true);
+        if ($result) {
+            if ($sourceStorage->instanceOfStorage(ObjectStoreStorage::class)) {
+                /** @var ObjectStoreStorage $sourceStorage */
+                $sourceStorage->setPreserveCacheOnDelete(true);
+            }
+            try {
+                if ($sourceStorage->is_dir($sourceInternalPath)) {
+                    $result = $sourceStorage->rmdir($sourceInternalPath);
+                } else {
+                    $result = $sourceStorage->unlink($sourceInternalPath);
+                }
+            } finally {
+                if ($sourceStorage->instanceOfStorage(ObjectStoreStorage::class)) {
+                    /** @var ObjectStoreStorage $sourceStorage */
+                    $sourceStorage->setPreserveCacheOnDelete(false);
+                }
+            }
+        }
+        return $result;
+    }
+
+    public function getMetaData(string $path): ?array {
+        if (Filesystem::isFileBlacklisted($path)) {
+            throw new ForbiddenException('Invalid path: ' . $path, false);
+        }
+
+        $permissions = $this->getPermissions($path);
+        if (!$permissions & \OCP\Constants::PERMISSION_READ) {
+            //can't read, nothing we can do
+            return null;
+        }
+
+        $data = [];
+        $data['mimetype'] = $this->getMimeType($path);
+        $data['mtime'] = $this->filemtime($path);
+        if ($data['mtime'] === false) {
+            $data['mtime'] = time();
+        }
+        if ($data['mimetype'] == 'httpd/unix-directory') {
+            $data['size'] = -1; //unknown
+        } else {
+            $data['size'] = $this->filesize($path);
+        }
+        $data['etag'] = $this->getETag($path);
+        $data['storage_mtime'] = $data['mtime'];
+        $data['permissions'] = $permissions;
+        $data['name'] = basename($path);
+
+        return $data;
+    }
+
+    public function acquireLock(string $path, int $type, ILockingProvider $provider): void {
+        $logger = $this->getLockLogger();
+        if ($logger) {
+            $typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
+            $logger->info(
+                sprintf(
+                    'acquire %s lock on "%s" on storage "%s"',
+                    $typeString,
+                    $path,
+                    $this->getId()
+                ),
+                [
+                    'app' => 'locking',
+                ]
+            );
+        }
+        try {
+            $provider->acquireLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type, $this->getId() . '::' . $path);
+        } catch (LockedException $e) {
+            $e = new LockedException($e->getPath(), $e, $e->getExistingLock(), $path);
+            if ($logger) {
+                $logger->info($e->getMessage(), ['exception' => $e]);
+            }
+            throw $e;
+        }
+    }
+
+    public function releaseLock(string $path, int $type, ILockingProvider $provider): void {
+        $logger = $this->getLockLogger();
+        if ($logger) {
+            $typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
+            $logger->info(
+                sprintf(
+                    'release %s lock on "%s" on storage "%s"',
+                    $typeString,
+                    $path,
+                    $this->getId()
+                ),
+                [
+                    'app' => 'locking',
+                ]
+            );
+        }
+        try {
+            $provider->releaseLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
+        } catch (LockedException $e) {
+            $e = new LockedException($e->getPath(), $e, $e->getExistingLock(), $path);
+            if ($logger) {
+                $logger->info($e->getMessage(), ['exception' => $e]);
+            }
+            throw $e;
+        }
+    }
+
+    public function changeLock(string $path, int $type, ILockingProvider $provider): void {
+        $logger = $this->getLockLogger();
+        if ($logger) {
+            $typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
+            $logger->info(
+                sprintf(
+                    'change lock on "%s" to %s on storage "%s"',
+                    $path,
+                    $typeString,
+                    $this->getId()
+                ),
+                [
+                    'app' => 'locking',
+                ]
+            );
+        }
+        try {
+            $provider->changeLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
+        } catch (LockedException $e) {
+            $e = new LockedException($e->getPath(), $e, $e->getExistingLock(), $path);
+            if ($logger) {
+                $logger->info($e->getMessage(), ['exception' => $e]);
+            }
+            throw $e;
+        }
+    }
+
+    private function getLockLogger(): ?LoggerInterface {
+        if (is_null($this->shouldLogLocks)) {
+            $this->shouldLogLocks = Server::get(IConfig::class)->getSystemValueBool('filelocking.debug', false);
+            $this->logger = $this->shouldLogLocks ? Server::get(LoggerInterface::class) : null;
+        }
+        return $this->logger;
+    }
+
+    /**
+     * @return array [ available, last_checked ]
+     */
+    public function getAvailability(): array {
+        return $this->getStorageCache()->getAvailability();
+    }
+
+    public function setAvailability(bool $isAvailable): void {
+        $this->getStorageCache()->setAvailability($isAvailable);
+    }
+
+    public function setOwner(?string $user): void {
+        $this->owner = $user;
+    }
+
+    public function needsPartFile(): bool {
+        return true;
+    }
+
+    public function writeStream(string $path, $stream, ?int $size = null): int {
+        $target = $this->fopen($path, 'w');
+        if (!$target) {
+            throw new GenericFileException("Failed to open $path for writing");
+        }
+        try {
+            [$count, $result] = Files::streamCopy($stream, $target, true);
+            if (!$result) {
+                throw new GenericFileException('Failed to copy stream');
+            }
+        } finally {
+            fclose($target);
+            fclose($stream);
+        }
+        return $count;
+    }
+
+    public function getDirectoryContent(string $directory): \Traversable {
+        $dh = $this->opendir($directory);
+
+        if ($dh === false) {
+            throw new StorageNotAvailableException('Directory listing failed');
+        }
+
+        if (is_resource($dh)) {
+            $basePath = rtrim($directory, '/');
+            while (($file = readdir($dh)) !== false) {
+                if (!Filesystem::isIgnoredDir($file)) {
+                    $childPath = $basePath . '/' . trim($file, '/');
+                    $metadata = $this->getMetaData($childPath);
+                    if ($metadata !== null) {
+                        yield $metadata;
+                    }
+                }
+            }
+        }
+    }
 }

lib/private/Files/View.php

Indentation +2244 added lines, -2244 removed lines

@@ -57,2248 +57,2248 @@
  * \OC\Files\Storage\Storage object
  */
 class View {
-	private string $fakeRoot = '';
-	private ILockingProvider $lockingProvider;
-	private bool $lockingEnabled;
-	private bool $updaterEnabled = true;
-	private UserManager $userManager;
-	private LoggerInterface $logger;
-
-	/**
-	 * @throws \Exception If $root contains an invalid path
-	 */
-	public function __construct(string $root = '') {
-		if (!Filesystem::isValidPath($root)) {
-			throw new \Exception();
-		}
-
-		$this->fakeRoot = $root;
-		$this->lockingProvider = \OC::$server->get(ILockingProvider::class);
-		$this->lockingEnabled = !($this->lockingProvider instanceof \OC\Lock\NoopLockingProvider);
-		$this->userManager = \OC::$server->getUserManager();
-		$this->logger = \OC::$server->get(LoggerInterface::class);
-	}
-
-	/**
-	 * @param ?string $path
-	 * @psalm-template S as string|null
-	 * @psalm-param S $path
-	 * @psalm-return (S is string ? string : null)
-	 */
-	public function getAbsolutePath($path = '/'): ?string {
-		if ($path === null) {
-			return null;
-		}
-		$this->assertPathLength($path);
-		if ($path === '') {
-			$path = '/';
-		}
-		if ($path[0] !== '/') {
-			$path = '/' . $path;
-		}
-		return $this->fakeRoot . $path;
-	}
-
-	/**
-	 * Change the root to a fake root
-	 *
-	 * @param string $fakeRoot
-	 */
-	public function chroot($fakeRoot): void {
-		if (!$fakeRoot == '') {
-			if ($fakeRoot[0] !== '/') {
-				$fakeRoot = '/' . $fakeRoot;
-			}
-		}
-		$this->fakeRoot = $fakeRoot;
-	}
-
-	/**
-	 * Get the fake root
-	 */
-	public function getRoot(): string {
-		return $this->fakeRoot;
-	}
-
-	/**
-	 * get path relative to the root of the view
-	 *
-	 * @param string $path
-	 */
-	public function getRelativePath($path): ?string {
-		$this->assertPathLength($path);
-		if ($this->fakeRoot == '') {
-			return $path;
-		}
-
-		if (rtrim($path, '/') === rtrim($this->fakeRoot, '/')) {
-			return '/';
-		}
-
-		// missing slashes can cause wrong matches!
-		$root = rtrim($this->fakeRoot, '/') . '/';
-
-		if (!str_starts_with($path, $root)) {
-			return null;
-		} else {
-			$path = substr($path, strlen($this->fakeRoot));
-			if (strlen($path) === 0) {
-				return '/';
-			} else {
-				return $path;
-			}
-		}
-	}
-
-	/**
-	 * Get the mountpoint of the storage object for a path
-	 * ( note: because a storage is not always mounted inside the fakeroot, the
-	 * returned mountpoint is relative to the absolute root of the filesystem
-	 * and does not take the chroot into account )
-	 *
-	 * @param string $path
-	 */
-	public function getMountPoint($path): string {
-		return Filesystem::getMountPoint($this->getAbsolutePath($path));
-	}
-
-	/**
-	 * Get the mountpoint of the storage object for a path
-	 * ( note: because a storage is not always mounted inside the fakeroot, the
-	 * returned mountpoint is relative to the absolute root of the filesystem
-	 * and does not take the chroot into account )
-	 *
-	 * @param string $path
-	 */
-	public function getMount($path): IMountPoint {
-		return Filesystem::getMountManager()->find($this->getAbsolutePath($path));
-	}
-
-	/**
-	 * Resolve a path to a storage and internal path
-	 *
-	 * @param string $path
-	 * @return array{?\OCP\Files\Storage\IStorage, string} an array consisting of the storage and the internal path
-	 */
-	public function resolvePath($path): array {
-		$a = $this->getAbsolutePath($path);
-		$p = Filesystem::normalizePath($a);
-		return Filesystem::resolvePath($p);
-	}
-
-	/**
-	 * Return the path to a local version of the file
-	 * we need this because we can't know if a file is stored local or not from
-	 * outside the filestorage and for some purposes a local file is needed
-	 *
-	 * @param string $path
-	 */
-	public function getLocalFile($path): string|false {
-		$parent = substr($path, 0, strrpos($path, '/') ?: 0);
-		$path = $this->getAbsolutePath($path);
-		[$storage, $internalPath] = Filesystem::resolvePath($path);
-		if (Filesystem::isValidPath($parent) && $storage) {
-			return $storage->getLocalFile($internalPath);
-		} else {
-			return false;
-		}
-	}
-
-	/**
-	 * the following functions operate with arguments and return values identical
-	 * to those of their PHP built-in equivalents. Mostly they are merely wrappers
-	 * for \OC\Files\Storage\Storage via basicOperation().
-	 */
-	public function mkdir($path) {
-		return $this->basicOperation('mkdir', $path, ['create', 'write']);
-	}
-
-	/**
-	 * remove mount point
-	 *
-	 * @param IMountPoint $mount
-	 * @param string $path relative to data/
-	 */
-	protected function removeMount($mount, $path): bool {
-		if ($mount instanceof MoveableMount) {
-			// cut of /user/files to get the relative path to data/user/files
-			$pathParts = explode('/', $path, 4);
-			$relPath = '/' . $pathParts[3];
-			$this->lockFile($relPath, ILockingProvider::LOCK_SHARED, true);
-			\OC_Hook::emit(
-				Filesystem::CLASSNAME, 'umount',
-				[Filesystem::signal_param_path => $relPath]
-			);
-			$this->changeLock($relPath, ILockingProvider::LOCK_EXCLUSIVE, true);
-			$result = $mount->removeMount();
-			$this->changeLock($relPath, ILockingProvider::LOCK_SHARED, true);
-			if ($result) {
-				\OC_Hook::emit(
-					Filesystem::CLASSNAME, 'post_umount',
-					[Filesystem::signal_param_path => $relPath]
-				);
-			}
-			$this->unlockFile($relPath, ILockingProvider::LOCK_SHARED, true);
-			return $result;
-		} else {
-			// do not allow deleting the storage's root / the mount point
-			// because for some storages it might delete the whole contents
-			// but isn't supposed to work that way
-			return false;
-		}
-	}
-
-	public function disableCacheUpdate(): void {
-		$this->updaterEnabled = false;
-	}
-
-	public function enableCacheUpdate(): void {
-		$this->updaterEnabled = true;
-	}
-
-	protected function writeUpdate(Storage $storage, string $internalPath, ?int $time = null, ?int $sizeDifference = null): void {
-		if ($this->updaterEnabled) {
-			if (is_null($time)) {
-				$time = time();
-			}
-			$storage->getUpdater()->update($internalPath, $time, $sizeDifference);
-		}
-	}
-
-	protected function removeUpdate(Storage $storage, string $internalPath): void {
-		if ($this->updaterEnabled) {
-			$storage->getUpdater()->remove($internalPath);
-		}
-	}
-
-	protected function renameUpdate(Storage $sourceStorage, Storage $targetStorage, string $sourceInternalPath, string $targetInternalPath): void {
-		if ($this->updaterEnabled) {
-			$targetStorage->getUpdater()->renameFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
-		}
-	}
-
-	protected function copyUpdate(Storage $sourceStorage, Storage $targetStorage, string $sourceInternalPath, string $targetInternalPath): void {
-		if ($this->updaterEnabled) {
-			$targetStorage->getUpdater()->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function rmdir($path) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$mount = Filesystem::getMountManager()->find($absolutePath);
-		if ($mount->getInternalPath($absolutePath) === '') {
-			return $this->removeMount($mount, $absolutePath);
-		}
-		if ($this->is_dir($path)) {
-			$result = $this->basicOperation('rmdir', $path, ['delete']);
-		} else {
-			$result = false;
-		}
-
-		if (!$result && !$this->file_exists($path)) { //clear ghost files from the cache on delete
-			$storage = $mount->getStorage();
-			$internalPath = $mount->getInternalPath($absolutePath);
-			$storage->getUpdater()->remove($internalPath);
-		}
-		return $result;
-	}
-
-	/**
-	 * @param string $path
-	 * @return resource|false
-	 */
-	public function opendir($path) {
-		return $this->basicOperation('opendir', $path, ['read']);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function is_dir($path) {
-		if ($path == '/') {
-			return true;
-		}
-		return $this->basicOperation('is_dir', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function is_file($path) {
-		if ($path == '/') {
-			return false;
-		}
-		return $this->basicOperation('is_file', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function stat($path) {
-		return $this->basicOperation('stat', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function filetype($path) {
-		return $this->basicOperation('filetype', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function filesize(string $path) {
-		return $this->basicOperation('filesize', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 * @throws InvalidPathException
-	 */
-	public function readfile($path) {
-		$this->assertPathLength($path);
-		if (ob_get_level()) {
-			ob_end_clean();
-		}
-		$handle = $this->fopen($path, 'rb');
-		if ($handle) {
-			$chunkSize = 524288; // 512 kiB chunks
-			while (!feof($handle)) {
-				echo fread($handle, $chunkSize);
-				flush();
-				$this->checkConnectionStatus();
-			}
-			fclose($handle);
-			return $this->filesize($path);
-		}
-		return false;
-	}
-
-	/**
-	 * @param string $path
-	 * @param int $from
-	 * @param int $to
-	 * @return bool|mixed
-	 * @throws InvalidPathException
-	 * @throws \OCP\Files\UnseekableException
-	 */
-	public function readfilePart($path, $from, $to) {
-		$this->assertPathLength($path);
-		if (ob_get_level()) {
-			ob_end_clean();
-		}
-		$handle = $this->fopen($path, 'rb');
-		if ($handle) {
-			$chunkSize = 524288; // 512 kiB chunks
-			$startReading = true;
-
-			if ($from !== 0 && $from !== '0' && fseek($handle, $from) !== 0) {
-				// forward file handle via chunked fread because fseek seem to have failed
-
-				$end = $from + 1;
-				while (!feof($handle) && ftell($handle) < $end && ftell($handle) !== $from) {
-					$len = $from - ftell($handle);
-					if ($len > $chunkSize) {
-						$len = $chunkSize;
-					}
-					$result = fread($handle, $len);
-
-					if ($result === false) {
-						$startReading = false;
-						break;
-					}
-				}
-			}
-
-			if ($startReading) {
-				$end = $to + 1;
-				while (!feof($handle) && ftell($handle) < $end) {
-					$len = $end - ftell($handle);
-					if ($len > $chunkSize) {
-						$len = $chunkSize;
-					}
-					echo fread($handle, $len);
-					flush();
-					$this->checkConnectionStatus();
-				}
-				return ftell($handle) - $from;
-			}
-
-			throw new \OCP\Files\UnseekableException('fseek error');
-		}
-		return false;
-	}
-
-	private function checkConnectionStatus(): void {
-		$connectionStatus = \connection_status();
-		if ($connectionStatus !== CONNECTION_NORMAL) {
-			throw new ConnectionLostException("Connection lost. Status: $connectionStatus");
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function isCreatable($path) {
-		return $this->basicOperation('isCreatable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function isReadable($path) {
-		return $this->basicOperation('isReadable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function isUpdatable($path) {
-		return $this->basicOperation('isUpdatable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function isDeletable($path) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$mount = Filesystem::getMountManager()->find($absolutePath);
-		if ($mount->getInternalPath($absolutePath) === '') {
-			return $mount instanceof MoveableMount;
-		}
-		return $this->basicOperation('isDeletable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function isSharable($path) {
-		return $this->basicOperation('isSharable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function file_exists($path) {
-		if ($path == '/') {
-			return true;
-		}
-		return $this->basicOperation('file_exists', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function filemtime($path) {
-		return $this->basicOperation('filemtime', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @param int|string $mtime
-	 */
-	public function touch($path, $mtime = null): bool {
-		if (!is_null($mtime) && !is_numeric($mtime)) {
-			$mtime = strtotime($mtime);
-		}
-
-		$hooks = ['touch'];
-
-		if (!$this->file_exists($path)) {
-			$hooks[] = 'create';
-			$hooks[] = 'write';
-		}
-		try {
-			$result = $this->basicOperation('touch', $path, $hooks, $mtime);
-		} catch (\Exception $e) {
-			$this->logger->info('Error while setting modified time', ['app' => 'core', 'exception' => $e]);
-			$result = false;
-		}
-		if (!$result) {
-			// If create file fails because of permissions on external storage like SMB folders,
-			// check file exists and return false if not.
-			if (!$this->file_exists($path)) {
-				return false;
-			}
-			if (is_null($mtime)) {
-				$mtime = time();
-			}
-			//if native touch fails, we emulate it by changing the mtime in the cache
-			$this->putFileInfo($path, ['mtime' => floor($mtime)]);
-		}
-		return true;
-	}
-
-	/**
-	 * @param string $path
-	 * @return string|false
-	 * @throws LockedException
-	 */
-	public function file_get_contents($path) {
-		return $this->basicOperation('file_get_contents', $path, ['read']);
-	}
-
-	protected function emit_file_hooks_pre(bool $exists, string $path, bool &$run): void {
-		if (!$exists) {
-			\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_create, [
-				Filesystem::signal_param_path => $this->getHookPath($path),
-				Filesystem::signal_param_run => &$run,
-			]);
-		} else {
-			\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_update, [
-				Filesystem::signal_param_path => $this->getHookPath($path),
-				Filesystem::signal_param_run => &$run,
-			]);
-		}
-		\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_write, [
-			Filesystem::signal_param_path => $this->getHookPath($path),
-			Filesystem::signal_param_run => &$run,
-		]);
-	}
-
-	protected function emit_file_hooks_post(bool $exists, string $path): void {
-		if (!$exists) {
-			\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_create, [
-				Filesystem::signal_param_path => $this->getHookPath($path),
-			]);
-		} else {
-			\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_update, [
-				Filesystem::signal_param_path => $this->getHookPath($path),
-			]);
-		}
-		\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_write, [
-			Filesystem::signal_param_path => $this->getHookPath($path),
-		]);
-	}
-
-	/**
-	 * @param string $path
-	 * @param string|resource $data
-	 * @return bool|mixed
-	 * @throws LockedException
-	 */
-	public function file_put_contents($path, $data) {
-		if (is_resource($data)) { //not having to deal with streams in file_put_contents makes life easier
-			$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
-			if (Filesystem::isValidPath($path)
-				&& !Filesystem::isFileBlacklisted($path)
-			) {
-				$path = $this->getRelativePath($absolutePath);
-				if ($path === null) {
-					throw new InvalidPathException("Path $absolutePath is not in the expected root");
-				}
-
-				$this->lockFile($path, ILockingProvider::LOCK_SHARED);
-
-				$exists = $this->file_exists($path);
-				if ($this->shouldEmitHooks($path)) {
-					$run = true;
-					$this->emit_file_hooks_pre($exists, $path, $run);
-					if (!$run) {
-						$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-						return false;
-					}
-				}
-
-				try {
-					$this->changeLock($path, ILockingProvider::LOCK_EXCLUSIVE);
-				} catch (\Exception $e) {
-					// Release the shared lock before throwing.
-					$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-					throw $e;
-				}
-
-				/** @var Storage $storage */
-				[$storage, $internalPath] = $this->resolvePath($path);
-				$target = $storage->fopen($internalPath, 'w');
-				if ($target) {
-					[, $result] = Files::streamCopy($data, $target, true);
-					fclose($target);
-					fclose($data);
-
-					$this->writeUpdate($storage, $internalPath);
-
-					$this->changeLock($path, ILockingProvider::LOCK_SHARED);
-
-					if ($this->shouldEmitHooks($path) && $result !== false) {
-						$this->emit_file_hooks_post($exists, $path);
-					}
-					$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-					return $result;
-				} else {
-					$this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
-					return false;
-				}
-			} else {
-				return false;
-			}
-		} else {
-			$hooks = $this->file_exists($path) ? ['update', 'write'] : ['create', 'write'];
-			return $this->basicOperation('file_put_contents', $path, $hooks, $data);
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function unlink($path) {
-		if ($path === '' || $path === '/') {
-			// do not allow deleting the root
-			return false;
-		}
-		$postFix = (substr($path, -1) === '/') ? '/' : '';
-		$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
-		$mount = Filesystem::getMountManager()->find($absolutePath . $postFix);
-		if ($mount->getInternalPath($absolutePath) === '') {
-			return $this->removeMount($mount, $absolutePath);
-		}
-		if ($this->is_dir($path)) {
-			$result = $this->basicOperation('rmdir', $path, ['delete']);
-		} else {
-			$result = $this->basicOperation('unlink', $path, ['delete']);
-		}
-		if (!$result && !$this->file_exists($path)) { //clear ghost files from the cache on delete
-			$storage = $mount->getStorage();
-			$internalPath = $mount->getInternalPath($absolutePath);
-			$storage->getUpdater()->remove($internalPath);
-			return true;
-		} else {
-			return $result;
-		}
-	}
-
-	/**
-	 * @param string $directory
-	 * @return bool|mixed
-	 */
-	public function deleteAll($directory) {
-		return $this->rmdir($directory);
-	}
-
-	/**
-	 * Rename/move a file or folder from the source path to target path.
-	 *
-	 * @param string $source source path
-	 * @param string $target target path
-	 * @param array $options
-	 *
-	 * @return bool|mixed
-	 * @throws LockedException
-	 */
-	public function rename($source, $target, array $options = []) {
-		$checkSubMounts = $options['checkSubMounts'] ?? true;
-
-		$absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
-		$absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
-
-		if (str_starts_with($absolutePath2, $absolutePath1 . '/')) {
-			throw new ForbiddenException('Moving a folder into a child folder is forbidden', false);
-		}
-
-		/** @var IMountManager $mountManager */
-		$mountManager = \OC::$server->get(IMountManager::class);
-
-		$targetParts = explode('/', $absolutePath2);
-		$targetUser = $targetParts[1] ?? null;
-		$result = false;
-		if (
-			Filesystem::isValidPath($target)
-			&& Filesystem::isValidPath($source)
-			&& !Filesystem::isFileBlacklisted($target)
-		) {
-			$source = $this->getRelativePath($absolutePath1);
-			$target = $this->getRelativePath($absolutePath2);
-			$exists = $this->file_exists($target);
-
-			if ($source == null || $target == null) {
-				return false;
-			}
-
-			try {
-				$this->verifyPath(dirname($target), basename($target));
-			} catch (InvalidPathException) {
-				return false;
-			}
-
-			$this->lockFile($source, ILockingProvider::LOCK_SHARED, true);
-			try {
-				$this->lockFile($target, ILockingProvider::LOCK_SHARED, true);
-
-				$run = true;
-				if ($this->shouldEmitHooks($source) && (Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target))) {
-					// if it was a rename from a part file to a regular file it was a write and not a rename operation
-					$this->emit_file_hooks_pre($exists, $target, $run);
-				} elseif ($this->shouldEmitHooks($source)) {
-					$sourcePath = $this->getHookPath($source);
-					$targetPath = $this->getHookPath($target);
-					if ($sourcePath !== null && $targetPath !== null) {
-						\OC_Hook::emit(
-							Filesystem::CLASSNAME, Filesystem::signal_rename,
-							[
-								Filesystem::signal_param_oldpath => $sourcePath,
-								Filesystem::signal_param_newpath => $targetPath,
-								Filesystem::signal_param_run => &$run
-							]
-						);
-					}
-				}
-				if ($run) {
-					$manager = Filesystem::getMountManager();
-					$mount1 = $this->getMount($source);
-					$mount2 = $this->getMount($target);
-					$storage1 = $mount1->getStorage();
-					$storage2 = $mount2->getStorage();
-					$internalPath1 = $mount1->getInternalPath($absolutePath1);
-					$internalPath2 = $mount2->getInternalPath($absolutePath2);
-
-					$this->changeLock($source, ILockingProvider::LOCK_EXCLUSIVE, true);
-					try {
-						$this->changeLock($target, ILockingProvider::LOCK_EXCLUSIVE, true);
-
-						if ($checkSubMounts) {
-							$movedMounts = $mountManager->findIn($this->getAbsolutePath($source));
-						} else {
-							$movedMounts = [];
-						}
-
-						if ($internalPath1 === '') {
-							$sourceParentMount = $this->getMount(dirname($source));
-							$movedMounts[] = $mount1;
-							$this->validateMountMove($movedMounts, $sourceParentMount, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
-							/**
-							 * @var \OC\Files\Mount\MountPoint | \OC\Files\Mount\MoveableMount $mount1
-							 */
-							$sourceMountPoint = $mount1->getMountPoint();
-							$result = $mount1->moveMount($absolutePath2);
-							$manager->moveMount($sourceMountPoint, $mount1->getMountPoint());
-
-							// moving a file/folder within the same mount point
-						} elseif ($storage1 === $storage2) {
-							if (count($movedMounts) > 0) {
-								$this->validateMountMove($movedMounts, $mount1, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
-							}
-							if ($storage1) {
-								$result = $storage1->rename($internalPath1, $internalPath2);
-							} else {
-								$result = false;
-							}
-							// moving a file/folder between storages (from $storage1 to $storage2)
-						} else {
-							if (count($movedMounts) > 0) {
-								$this->validateMountMove($movedMounts, $mount1, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
-							}
-							$result = $storage2->moveFromStorage($storage1, $internalPath1, $internalPath2);
-						}
-
-						if ((Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target)) && $result !== false) {
-							// if it was a rename from a part file to a regular file it was a write and not a rename operation
-							$this->writeUpdate($storage2, $internalPath2);
-						} elseif ($result) {
-							if ($internalPath1 !== '') { // don't do a cache update for moved mounts
-								$this->renameUpdate($storage1, $storage2, $internalPath1, $internalPath2);
-							}
-						}
-					} catch (\Exception $e) {
-						throw $e;
-					} finally {
-						$this->changeLock($source, ILockingProvider::LOCK_SHARED, true);
-						$this->changeLock($target, ILockingProvider::LOCK_SHARED, true);
-					}
-
-					if ((Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target)) && $result !== false) {
-						if ($this->shouldEmitHooks()) {
-							$this->emit_file_hooks_post($exists, $target);
-						}
-					} elseif ($result) {
-						if ($this->shouldEmitHooks($source) && $this->shouldEmitHooks($target)) {
-							$sourcePath = $this->getHookPath($source);
-							$targetPath = $this->getHookPath($target);
-							if ($sourcePath !== null && $targetPath !== null) {
-								\OC_Hook::emit(
-									Filesystem::CLASSNAME,
-									Filesystem::signal_post_rename,
-									[
-										Filesystem::signal_param_oldpath => $sourcePath,
-										Filesystem::signal_param_newpath => $targetPath,
-									]
-								);
-							}
-						}
-					}
-				}
-			} catch (\Exception $e) {
-				throw $e;
-			} finally {
-				$this->unlockFile($source, ILockingProvider::LOCK_SHARED, true);
-				$this->unlockFile($target, ILockingProvider::LOCK_SHARED, true);
-			}
-		}
-		return $result;
-	}
-
-	/**
-	 * @throws ForbiddenException
-	 */
-	private function validateMountMove(array $mounts, IMountPoint $sourceMount, IMountPoint $targetMount, bool $targetIsShared): void {
-		$targetPath = $this->getRelativePath($targetMount->getMountPoint());
-		if ($targetPath) {
-			$targetPath = trim($targetPath, '/');
-		} else {
-			$targetPath = $targetMount->getMountPoint();
-		}
-
-		$l = \OC::$server->get(IFactory::class)->get('files');
-		foreach ($mounts as $mount) {
-			$sourcePath = $this->getRelativePath($mount->getMountPoint());
-			if ($sourcePath) {
-				$sourcePath = trim($sourcePath, '/');
-			} else {
-				$sourcePath = $mount->getMountPoint();
-			}
-
-			if (!$mount instanceof MoveableMount) {
-				throw new ForbiddenException($l->t('Storage %s cannot be moved', [$sourcePath]), false);
-			}
-
-			if ($targetIsShared) {
-				if ($sourceMount instanceof SharedMount) {
-					throw new ForbiddenException($l->t('Moving a share (%s) into a shared folder is not allowed', [$sourcePath]), false);
-				} else {
-					throw new ForbiddenException($l->t('Moving a storage (%s) into a shared folder is not allowed', [$sourcePath]), false);
-				}
-			}
-
-			if ($sourceMount !== $targetMount) {
-				if ($sourceMount instanceof SharedMount) {
-					if ($targetMount instanceof SharedMount) {
-						throw new ForbiddenException($l->t('Moving a share (%s) into another share (%s) is not allowed', [$sourcePath, $targetPath]), false);
-					} else {
-						throw new ForbiddenException($l->t('Moving a share (%s) into another storage (%s) is not allowed', [$sourcePath, $targetPath]), false);
-					}
-				} else {
-					if ($targetMount instanceof SharedMount) {
-						throw new ForbiddenException($l->t('Moving a storage (%s) into a share (%s) is not allowed', [$sourcePath, $targetPath]), false);
-					} else {
-						throw new ForbiddenException($l->t('Moving a storage (%s) into another storage (%s) is not allowed', [$sourcePath, $targetPath]), false);
-					}
-				}
-			}
-		}
-	}
-
-	/**
-	 * Copy a file/folder from the source path to target path
-	 *
-	 * @param string $source source path
-	 * @param string $target target path
-	 * @param bool $preserveMtime whether to preserve mtime on the copy
-	 *
-	 * @return bool|mixed
-	 */
-	public function copy($source, $target, $preserveMtime = false) {
-		$absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
-		$absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
-		$result = false;
-		if (
-			Filesystem::isValidPath($target)
-			&& Filesystem::isValidPath($source)
-			&& !Filesystem::isFileBlacklisted($target)
-		) {
-			$source = $this->getRelativePath($absolutePath1);
-			$target = $this->getRelativePath($absolutePath2);
-
-			if ($source == null || $target == null) {
-				return false;
-			}
-			$run = true;
-
-			$this->lockFile($target, ILockingProvider::LOCK_SHARED);
-			$this->lockFile($source, ILockingProvider::LOCK_SHARED);
-			$lockTypePath1 = ILockingProvider::LOCK_SHARED;
-			$lockTypePath2 = ILockingProvider::LOCK_SHARED;
-
-			try {
-				$exists = $this->file_exists($target);
-				if ($this->shouldEmitHooks()) {
-					\OC_Hook::emit(
-						Filesystem::CLASSNAME,
-						Filesystem::signal_copy,
-						[
-							Filesystem::signal_param_oldpath => $this->getHookPath($source),
-							Filesystem::signal_param_newpath => $this->getHookPath($target),
-							Filesystem::signal_param_run => &$run
-						]
-					);
-					$this->emit_file_hooks_pre($exists, $target, $run);
-				}
-				if ($run) {
-					$mount1 = $this->getMount($source);
-					$mount2 = $this->getMount($target);
-					$storage1 = $mount1->getStorage();
-					$internalPath1 = $mount1->getInternalPath($absolutePath1);
-					$storage2 = $mount2->getStorage();
-					$internalPath2 = $mount2->getInternalPath($absolutePath2);
-
-					$this->changeLock($target, ILockingProvider::LOCK_EXCLUSIVE);
-					$lockTypePath2 = ILockingProvider::LOCK_EXCLUSIVE;
-
-					if ($mount1->getMountPoint() == $mount2->getMountPoint()) {
-						if ($storage1) {
-							$result = $storage1->copy($internalPath1, $internalPath2);
-						} else {
-							$result = false;
-						}
-					} else {
-						$result = $storage2->copyFromStorage($storage1, $internalPath1, $internalPath2);
-					}
-
-					if ($result) {
-						$this->copyUpdate($storage1, $storage2, $internalPath1, $internalPath2);
-					}
-
-					$this->changeLock($target, ILockingProvider::LOCK_SHARED);
-					$lockTypePath2 = ILockingProvider::LOCK_SHARED;
-
-					if ($this->shouldEmitHooks() && $result !== false) {
-						\OC_Hook::emit(
-							Filesystem::CLASSNAME,
-							Filesystem::signal_post_copy,
-							[
-								Filesystem::signal_param_oldpath => $this->getHookPath($source),
-								Filesystem::signal_param_newpath => $this->getHookPath($target)
-							]
-						);
-						$this->emit_file_hooks_post($exists, $target);
-					}
-				}
-			} catch (\Exception $e) {
-				$this->unlockFile($target, $lockTypePath2);
-				$this->unlockFile($source, $lockTypePath1);
-				throw $e;
-			}
-
-			$this->unlockFile($target, $lockTypePath2);
-			$this->unlockFile($source, $lockTypePath1);
-		}
-		return $result;
-	}
-
-	/**
-	 * @param string $path
-	 * @param string $mode 'r' or 'w'
-	 * @return resource|false
-	 * @throws LockedException
-	 */
-	public function fopen($path, $mode) {
-		$mode = str_replace('b', '', $mode); // the binary flag is a windows only feature which we do not support
-		$hooks = [];
-		switch ($mode) {
-			case 'r':
-				$hooks[] = 'read';
-				break;
-			case 'r+':
-			case 'w+':
-			case 'x+':
-			case 'a+':
-				$hooks[] = 'read';
-				$hooks[] = 'write';
-				break;
-			case 'w':
-			case 'x':
-			case 'a':
-				$hooks[] = 'write';
-				break;
-			default:
-				$this->logger->error('invalid mode (' . $mode . ') for ' . $path, ['app' => 'core']);
-		}
-
-		if ($mode !== 'r' && $mode !== 'w') {
-			$this->logger->info('Trying to open a file with a mode other than "r" or "w" can cause severe performance issues with some backends', ['app' => 'core']);
-		}
-
-		$handle = $this->basicOperation('fopen', $path, $hooks, $mode);
-		if (!is_resource($handle) && $mode === 'r') {
-			// trying to read a file that isn't on disk, check if the cache is out of sync and rescan if needed
-			$mount = $this->getMount($path);
-			$internalPath = $mount->getInternalPath($this->getAbsolutePath($path));
-			$storage = $mount->getStorage();
-			if ($storage->getCache()->inCache($internalPath) && !$storage->file_exists($path)) {
-				$this->writeUpdate($storage, $internalPath);
-			}
-		}
-		return $handle;
-	}
-
-	/**
-	 * @param string $path
-	 * @throws InvalidPathException
-	 */
-	public function toTmpFile($path): string|false {
-		$this->assertPathLength($path);
-		if (Filesystem::isValidPath($path)) {
-			$source = $this->fopen($path, 'r');
-			if ($source) {
-				$extension = pathinfo($path, PATHINFO_EXTENSION);
-				$tmpFile = \OC::$server->getTempManager()->getTemporaryFile($extension);
-				file_put_contents($tmpFile, $source);
-				return $tmpFile;
-			} else {
-				return false;
-			}
-		} else {
-			return false;
-		}
-	}
-
-	/**
-	 * @param string $tmpFile
-	 * @param string $path
-	 * @return bool|mixed
-	 * @throws InvalidPathException
-	 */
-	public function fromTmpFile($tmpFile, $path) {
-		$this->assertPathLength($path);
-		if (Filesystem::isValidPath($path)) {
-			// Get directory that the file is going into
-			$filePath = dirname($path);
-
-			// Create the directories if any
-			if (!$this->file_exists($filePath)) {
-				$result = $this->createParentDirectories($filePath);
-				if ($result === false) {
-					return false;
-				}
-			}
-
-			$source = fopen($tmpFile, 'r');
-			if ($source) {
-				$result = $this->file_put_contents($path, $source);
-				/**
-				 * $this->file_put_contents() might have already closed
-				 * the resource, so we check it, before trying to close it
-				 * to avoid messages in the error log.
-				 * @psalm-suppress RedundantCondition false-positive
-				 */
-				if (is_resource($source)) {
-					fclose($source);
-				}
-				unlink($tmpFile);
-				return $result;
-			} else {
-				return false;
-			}
-		} else {
-			return false;
-		}
-	}
-
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 * @throws InvalidPathException
-	 */
-	public function getMimeType($path) {
-		$this->assertPathLength($path);
-		return $this->basicOperation('getMimeType', $path);
-	}
-
-	/**
-	 * @param string $type
-	 * @param string $path
-	 * @param bool $raw
-	 */
-	public function hash($type, $path, $raw = false): string|bool {
-		$postFix = (substr($path, -1) === '/') ? '/' : '';
-		$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
-		if (Filesystem::isValidPath($path)) {
-			$path = $this->getRelativePath($absolutePath);
-			if ($path == null) {
-				return false;
-			}
-			if ($this->shouldEmitHooks($path)) {
-				\OC_Hook::emit(
-					Filesystem::CLASSNAME,
-					Filesystem::signal_read,
-					[Filesystem::signal_param_path => $this->getHookPath($path)]
-				);
-			}
-			/** @var Storage|null $storage */
-			[$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
-			if ($storage) {
-				return $storage->hash($type, $internalPath, $raw);
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 * @throws InvalidPathException
-	 */
-	public function free_space($path = '/') {
-		$this->assertPathLength($path);
-		$result = $this->basicOperation('free_space', $path);
-		if ($result === null) {
-			throw new InvalidPathException();
-		}
-		return $result;
-	}
-
-	/**
-	 * abstraction layer for basic filesystem functions: wrapper for \OC\Files\Storage\Storage
-	 *
-	 * @param mixed $extraParam (optional)
-	 * @return mixed
-	 * @throws LockedException
-	 *
-	 * This method takes requests for basic filesystem functions (e.g. reading & writing
-	 * files), processes hooks and proxies, sanitises paths, and finally passes them on to
-	 * \OC\Files\Storage\Storage for delegation to a storage backend for execution
-	 */
-	private function basicOperation(string $operation, string $path, array $hooks = [], $extraParam = null) {
-		$postFix = (substr($path, -1) === '/') ? '/' : '';
-		$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
-		if (Filesystem::isValidPath($path)
-			&& !Filesystem::isFileBlacklisted($path)
-		) {
-			$path = $this->getRelativePath($absolutePath);
-			if ($path == null) {
-				return false;
-			}
-
-			if (in_array('write', $hooks) || in_array('delete', $hooks) || in_array('read', $hooks)) {
-				// always a shared lock during pre-hooks so the hook can read the file
-				$this->lockFile($path, ILockingProvider::LOCK_SHARED);
-			}
-
-			$run = $this->runHooks($hooks, $path);
-			[$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
-			if ($run && $storage) {
-				/** @var Storage $storage */
-				if (in_array('write', $hooks) || in_array('delete', $hooks)) {
-					try {
-						$this->changeLock($path, ILockingProvider::LOCK_EXCLUSIVE);
-					} catch (LockedException $e) {
-						// release the shared lock we acquired before quitting
-						$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-						throw $e;
-					}
-				}
-				try {
-					if (!is_null($extraParam)) {
-						$result = $storage->$operation($internalPath, $extraParam);
-					} else {
-						$result = $storage->$operation($internalPath);
-					}
-				} catch (\Exception $e) {
-					if (in_array('write', $hooks) || in_array('delete', $hooks)) {
-						$this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
-					} elseif (in_array('read', $hooks)) {
-						$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-					}
-					throw $e;
-				}
-
-				if ($result !== false && in_array('delete', $hooks)) {
-					$this->removeUpdate($storage, $internalPath);
-				}
-				if ($result !== false && in_array('write', $hooks, true) && $operation !== 'fopen' && $operation !== 'touch') {
-					$isCreateOperation = $operation === 'mkdir' || ($operation === 'file_put_contents' && in_array('create', $hooks, true));
-					$sizeDifference = $operation === 'mkdir' ? 0 : $result;
-					$this->writeUpdate($storage, $internalPath, null, $isCreateOperation ? $sizeDifference : null);
-				}
-				if ($result !== false && in_array('touch', $hooks)) {
-					$this->writeUpdate($storage, $internalPath, $extraParam, 0);
-				}
-
-				if ((in_array('write', $hooks) || in_array('delete', $hooks)) && ($operation !== 'fopen' || $result === false)) {
-					$this->changeLock($path, ILockingProvider::LOCK_SHARED);
-				}
-
-				$unlockLater = false;
-				if ($this->lockingEnabled && $operation === 'fopen' && is_resource($result)) {
-					$unlockLater = true;
-					// make sure our unlocking callback will still be called if connection is aborted
-					ignore_user_abort(true);
-					$result = CallbackWrapper::wrap($result, null, null, function () use ($hooks, $path) {
-						if (in_array('write', $hooks)) {
-							$this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
-						} elseif (in_array('read', $hooks)) {
-							$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-						}
-					});
-				}
-
-				if ($this->shouldEmitHooks($path) && $result !== false) {
-					if ($operation != 'fopen') { //no post hooks for fopen, the file stream is still open
-						$this->runHooks($hooks, $path, true);
-					}
-				}
-
-				if (!$unlockLater
-					&& (in_array('write', $hooks) || in_array('delete', $hooks) || in_array('read', $hooks))
-				) {
-					$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-				}
-				return $result;
-			} else {
-				$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-			}
-		}
-		return null;
-	}
-
-	/**
-	 * get the path relative to the default root for hook usage
-	 *
-	 * @param string $path
-	 * @return ?string
-	 */
-	private function getHookPath($path): ?string {
-		$view = Filesystem::getView();
-		if (!$view) {
-			return $path;
-		}
-		return $view->getRelativePath($this->getAbsolutePath($path));
-	}
-
-	private function shouldEmitHooks(string $path = ''): bool {
-		if ($path && Cache\Scanner::isPartialFile($path)) {
-			return false;
-		}
-		if (!Filesystem::$loaded) {
-			return false;
-		}
-		$defaultRoot = Filesystem::getRoot();
-		if ($defaultRoot === null) {
-			return false;
-		}
-		if ($this->fakeRoot === $defaultRoot) {
-			return true;
-		}
-		$fullPath = $this->getAbsolutePath($path);
-
-		if ($fullPath === $defaultRoot) {
-			return true;
-		}
-
-		return (strlen($fullPath) > strlen($defaultRoot)) && (substr($fullPath, 0, strlen($defaultRoot) + 1) === $defaultRoot . '/');
-	}
-
-	/**
-	 * @param string[] $hooks
-	 * @param string $path
-	 * @param bool $post
-	 * @return bool
-	 */
-	private function runHooks($hooks, $path, $post = false) {
-		$relativePath = $path;
-		$path = $this->getHookPath($path);
-		$prefix = $post ? 'post_' : '';
-		$run = true;
-		if ($this->shouldEmitHooks($relativePath)) {
-			foreach ($hooks as $hook) {
-				if ($hook != 'read') {
-					\OC_Hook::emit(
-						Filesystem::CLASSNAME,
-						$prefix . $hook,
-						[
-							Filesystem::signal_param_run => &$run,
-							Filesystem::signal_param_path => $path
-						]
-					);
-				} elseif (!$post) {
-					\OC_Hook::emit(
-						Filesystem::CLASSNAME,
-						$prefix . $hook,
-						[
-							Filesystem::signal_param_path => $path
-						]
-					);
-				}
-			}
-		}
-		return $run;
-	}
-
-	/**
-	 * check if a file or folder has been updated since $time
-	 *
-	 * @param string $path
-	 * @param int $time
-	 * @return bool
-	 */
-	public function hasUpdated($path, $time) {
-		return $this->basicOperation('hasUpdated', $path, [], $time);
-	}
-
-	/**
-	 * @param string $ownerId
-	 * @return IUser
-	 */
-	private function getUserObjectForOwner(string $ownerId) {
-		return new LazyUser($ownerId, $this->userManager);
-	}
-
-	/**
-	 * Get file info from cache
-	 *
-	 * If the file is not in cached it will be scanned
-	 * If the file has changed on storage the cache will be updated
-	 *
-	 * @param Storage $storage
-	 * @param string $internalPath
-	 * @param string $relativePath
-	 * @return ICacheEntry|bool
-	 */
-	private function getCacheEntry($storage, $internalPath, $relativePath) {
-		$cache = $storage->getCache($internalPath);
-		$data = $cache->get($internalPath);
-		$watcher = $storage->getWatcher($internalPath);
-
-		try {
-			// if the file is not in the cache or needs to be updated, trigger the scanner and reload the data
-			if (!$data || (isset($data['size']) && $data['size'] === -1)) {
-				if (!$storage->file_exists($internalPath)) {
-					return false;
-				}
-				// don't need to get a lock here since the scanner does it's own locking
-				$scanner = $storage->getScanner($internalPath);
-				$scanner->scan($internalPath, Cache\Scanner::SCAN_SHALLOW);
-				$data = $cache->get($internalPath);
-			} elseif (!Cache\Scanner::isPartialFile($internalPath) && $watcher->needsUpdate($internalPath, $data)) {
-				$this->lockFile($relativePath, ILockingProvider::LOCK_SHARED);
-				$watcher->update($internalPath, $data);
-				$storage->getPropagator()->propagateChange($internalPath, time());
-				$data = $cache->get($internalPath);
-				$this->unlockFile($relativePath, ILockingProvider::LOCK_SHARED);
-			}
-		} catch (LockedException $e) {
-			// if the file is locked we just use the old cache info
-		}
-
-		return $data;
-	}
-
-	/**
-	 * get the filesystem info
-	 *
-	 * @param string $path
-	 * @param bool|string $includeMountPoints true to add mountpoint sizes,
-	 *                                        'ext' to add only ext storage mount point sizes. Defaults to true.
-	 * @return \OC\Files\FileInfo|false False if file does not exist
-	 */
-	public function getFileInfo($path, $includeMountPoints = true) {
-		$this->assertPathLength($path);
-		if (!Filesystem::isValidPath($path)) {
-			return false;
-		}
-		$relativePath = $path;
-		$path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
-
-		$mount = Filesystem::getMountManager()->find($path);
-		$storage = $mount->getStorage();
-		$internalPath = $mount->getInternalPath($path);
-		if ($storage) {
-			$data = $this->getCacheEntry($storage, $internalPath, $relativePath);
-
-			if (!$data instanceof ICacheEntry) {
-				if (Cache\Scanner::isPartialFile($relativePath)) {
-					return $this->getPartFileInfo($relativePath);
-				}
-
-				return false;
-			}
-
-			if ($mount instanceof MoveableMount && $internalPath === '') {
-				$data['permissions'] |= \OCP\Constants::PERMISSION_DELETE;
-			}
-			if ($internalPath === '' && $data['name']) {
-				$data['name'] = basename($path);
-			}
-
-			$ownerId = $storage->getOwner($internalPath);
-			$owner = null;
-			if ($ownerId !== false) {
-				// ownerId might be null if files are accessed with an access token without file system access
-				$owner = $this->getUserObjectForOwner($ownerId);
-			}
-			$info = new FileInfo($path, $storage, $internalPath, $data, $mount, $owner);
-
-			if (isset($data['fileid'])) {
-				if ($includeMountPoints && $data['mimetype'] === 'httpd/unix-directory') {
-					//add the sizes of other mount points to the folder
-					$extOnly = ($includeMountPoints === 'ext');
-					$this->addSubMounts($info, $extOnly);
-				}
-			}
-
-			return $info;
-		} else {
-			$this->logger->warning('Storage not valid for mountpoint: ' . $mount->getMountPoint(), ['app' => 'core']);
-		}
-
-		return false;
-	}
-
-	/**
-	 * Extend a FileInfo that was previously requested with `$includeMountPoints = false` to include the sub mounts
-	 */
-	public function addSubMounts(FileInfo $info, $extOnly = false): void {
-		$mounts = Filesystem::getMountManager()->findIn($info->getPath());
-		$info->setSubMounts(array_filter($mounts, function (IMountPoint $mount) use ($extOnly) {
-			return !($extOnly && $mount instanceof SharedMount);
-		}));
-	}
-
-	/**
-	 * get the content of a directory
-	 *
-	 * @param string $directory path under datadirectory
-	 * @param string $mimetype_filter limit returned content to this mimetype or mimepart
-	 * @return FileInfo[]
-	 */
-	public function getDirectoryContent($directory, $mimetype_filter = '', ?\OCP\Files\FileInfo $directoryInfo = null) {
-		$this->assertPathLength($directory);
-		if (!Filesystem::isValidPath($directory)) {
-			return [];
-		}
-
-		$path = $this->getAbsolutePath($directory);
-		$path = Filesystem::normalizePath($path);
-		$mount = $this->getMount($directory);
-		$storage = $mount->getStorage();
-		$internalPath = $mount->getInternalPath($path);
-		if (!$storage) {
-			return [];
-		}
-
-		$cache = $storage->getCache($internalPath);
-		$user = \OC_User::getUser();
-
-		if (!$directoryInfo) {
-			$data = $this->getCacheEntry($storage, $internalPath, $directory);
-			if (!$data instanceof ICacheEntry || !isset($data['fileid'])) {
-				return [];
-			}
-		} else {
-			$data = $directoryInfo;
-		}
-
-		if (!($data->getPermissions() & Constants::PERMISSION_READ)) {
-			return [];
-		}
-
-		$folderId = $data->getId();
-		$contents = $cache->getFolderContentsById($folderId); //TODO: mimetype_filter
-
-		$sharingDisabled = \OCP\Util::isSharingDisabledForUser();
-
-		$fileNames = array_map(function (ICacheEntry $content) {
-			return $content->getName();
-		}, $contents);
-		/**
-		 * @var \OC\Files\FileInfo[] $fileInfos
-		 */
-		$fileInfos = array_map(function (ICacheEntry $content) use ($path, $storage, $mount, $sharingDisabled) {
-			if ($sharingDisabled) {
-				$content['permissions'] = $content['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
-			}
-			$ownerId = $storage->getOwner($content['path']);
-			if ($ownerId !== false) {
-				$owner = $this->getUserObjectForOwner($ownerId);
-			} else {
-				$owner = null;
-			}
-			return new FileInfo($path . '/' . $content['name'], $storage, $content['path'], $content, $mount, $owner);
-		}, $contents);
-		$files = array_combine($fileNames, $fileInfos);
-
-		//add a folder for any mountpoint in this directory and add the sizes of other mountpoints to the folders
-		$mounts = Filesystem::getMountManager()->findIn($path);
-
-		// make sure nested mounts are sorted after their parent mounts
-		// otherwise doesn't propagate the etag across storage boundaries correctly
-		usort($mounts, function (IMountPoint $a, IMountPoint $b) {
-			return $a->getMountPoint() <=> $b->getMountPoint();
-		});
-
-		$dirLength = strlen($path);
-		foreach ($mounts as $mount) {
-			$mountPoint = $mount->getMountPoint();
-			$subStorage = $mount->getStorage();
-			if ($subStorage) {
-				$subCache = $subStorage->getCache('');
-
-				$rootEntry = $subCache->get('');
-				if (!$rootEntry) {
-					$subScanner = $subStorage->getScanner();
-					try {
-						$subScanner->scanFile('');
-					} catch (\OCP\Files\StorageNotAvailableException $e) {
-						continue;
-					} catch (\OCP\Files\StorageInvalidException $e) {
-						continue;
-					} catch (\Exception $e) {
-						// sometimes when the storage is not available it can be any exception
-						$this->logger->error('Exception while scanning storage "' . $subStorage->getId() . '"', [
-							'exception' => $e,
-							'app' => 'core',
-						]);
-						continue;
-					}
-					$rootEntry = $subCache->get('');
-				}
-
-				if ($rootEntry && ($rootEntry->getPermissions() & Constants::PERMISSION_READ)) {
-					$relativePath = trim(substr($mountPoint, $dirLength), '/');
-					if ($pos = strpos($relativePath, '/')) {
-						//mountpoint inside subfolder add size to the correct folder
-						$entryName = substr($relativePath, 0, $pos);
-
-						// Create parent folders if the mountpoint is inside a subfolder that doesn't exist yet
-						if (!isset($files[$entryName])) {
-							try {
-								[$storage, ] = $this->resolvePath($path . '/' . $entryName);
-								// make sure we can create the mountpoint folder, even if the user has a quota of 0
-								if ($storage->instanceOfStorage(Quota::class)) {
-									$storage->enableQuota(false);
-								}
-
-								if ($this->mkdir($path . '/' . $entryName) !== false) {
-									$info = $this->getFileInfo($path . '/' . $entryName);
-									if ($info !== false) {
-										$files[$entryName] = $info;
-									}
-								}
-
-								if ($storage->instanceOfStorage(Quota::class)) {
-									$storage->enableQuota(true);
-								}
-							} catch (\Exception $e) {
-								// Creating the parent folder might not be possible, for example due to a lack of permissions.
-								$this->logger->debug('Failed to create non-existent parent', ['exception' => $e, 'path' => $path . '/' . $entryName]);
-							}
-						}
-
-						if (isset($files[$entryName])) {
-							$files[$entryName]->addSubEntry($rootEntry, $mountPoint);
-						}
-					} else { //mountpoint in this folder, add an entry for it
-						$rootEntry['name'] = $relativePath;
-						$rootEntry['type'] = $rootEntry['mimetype'] === 'httpd/unix-directory' ? 'dir' : 'file';
-						$permissions = $rootEntry['permissions'];
-						// do not allow renaming/deleting the mount point if they are not shared files/folders
-						// for shared files/folders we use the permissions given by the owner
-						if ($mount instanceof MoveableMount) {
-							$rootEntry['permissions'] = $permissions | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE;
-						} else {
-							$rootEntry['permissions'] = $permissions & (\OCP\Constants::PERMISSION_ALL - (\OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE));
-						}
-
-						$rootEntry['path'] = substr(Filesystem::normalizePath($path . '/' . $rootEntry['name']), strlen($user) + 2); // full path without /$user/
-
-						// if sharing was disabled for the user we remove the share permissions
-						if ($sharingDisabled) {
-							$rootEntry['permissions'] = $rootEntry['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
-						}
-
-						$ownerId = $subStorage->getOwner('');
-						if ($ownerId !== false) {
-							$owner = $this->getUserObjectForOwner($ownerId);
-						} else {
-							$owner = null;
-						}
-						$files[$rootEntry->getName()] = new FileInfo($path . '/' . $rootEntry['name'], $subStorage, '', $rootEntry, $mount, $owner);
-					}
-				}
-			}
-		}
-
-		if ($mimetype_filter) {
-			$files = array_filter($files, function (FileInfo $file) use ($mimetype_filter) {
-				if (strpos($mimetype_filter, '/')) {
-					return $file->getMimetype() === $mimetype_filter;
-				} else {
-					return $file->getMimePart() === $mimetype_filter;
-				}
-			});
-		}
-
-		return array_values($files);
-	}
-
-	/**
-	 * change file metadata
-	 *
-	 * @param string $path
-	 * @param array|\OCP\Files\FileInfo $data
-	 * @return int
-	 *
-	 * returns the fileid of the updated file
-	 */
-	public function putFileInfo($path, $data) {
-		$this->assertPathLength($path);
-		if ($data instanceof FileInfo) {
-			$data = $data->getData();
-		}
-		$path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
-		/**
-		 * @var Storage $storage
-		 * @var string $internalPath
-		 */
-		[$storage, $internalPath] = Filesystem::resolvePath($path);
-		if ($storage) {
-			$cache = $storage->getCache($path);
-
-			if (!$cache->inCache($internalPath)) {
-				$scanner = $storage->getScanner($internalPath);
-				$scanner->scan($internalPath, Cache\Scanner::SCAN_SHALLOW);
-			}
-
-			return $cache->put($internalPath, $data);
-		} else {
-			return -1;
-		}
-	}
-
-	/**
-	 * search for files with the name matching $query
-	 *
-	 * @param string $query
-	 * @return FileInfo[]
-	 */
-	public function search($query) {
-		return $this->searchCommon('search', ['%' . $query . '%']);
-	}
-
-	/**
-	 * search for files with the name matching $query
-	 *
-	 * @param string $query
-	 * @return FileInfo[]
-	 */
-	public function searchRaw($query) {
-		return $this->searchCommon('search', [$query]);
-	}
-
-	/**
-	 * search for files by mimetype
-	 *
-	 * @param string $mimetype
-	 * @return FileInfo[]
-	 */
-	public function searchByMime($mimetype) {
-		return $this->searchCommon('searchByMime', [$mimetype]);
-	}
-
-	/**
-	 * search for files by tag
-	 *
-	 * @param string|int $tag name or tag id
-	 * @param string $userId owner of the tags
-	 * @return FileInfo[]
-	 */
-	public function searchByTag($tag, $userId) {
-		return $this->searchCommon('searchByTag', [$tag, $userId]);
-	}
-
-	/**
-	 * @param string $method cache method
-	 * @param array $args
-	 * @return FileInfo[]
-	 */
-	private function searchCommon($method, $args) {
-		$files = [];
-		$rootLength = strlen($this->fakeRoot);
-
-		$mount = $this->getMount('');
-		$mountPoint = $mount->getMountPoint();
-		$storage = $mount->getStorage();
-		$userManager = \OC::$server->getUserManager();
-		if ($storage) {
-			$cache = $storage->getCache('');
-
-			$results = call_user_func_array([$cache, $method], $args);
-			foreach ($results as $result) {
-				if (substr($mountPoint . $result['path'], 0, $rootLength + 1) === $this->fakeRoot . '/') {
-					$internalPath = $result['path'];
-					$path = $mountPoint . $result['path'];
-					$result['path'] = substr($mountPoint . $result['path'], $rootLength);
-					$ownerId = $storage->getOwner($internalPath);
-					if ($ownerId !== false) {
-						$owner = $userManager->get($ownerId);
-					} else {
-						$owner = null;
-					}
-					$files[] = new FileInfo($path, $storage, $internalPath, $result, $mount, $owner);
-				}
-			}
-
-			$mounts = Filesystem::getMountManager()->findIn($this->fakeRoot);
-			foreach ($mounts as $mount) {
-				$mountPoint = $mount->getMountPoint();
-				$storage = $mount->getStorage();
-				if ($storage) {
-					$cache = $storage->getCache('');
-
-					$relativeMountPoint = substr($mountPoint, $rootLength);
-					$results = call_user_func_array([$cache, $method], $args);
-					if ($results) {
-						foreach ($results as $result) {
-							$internalPath = $result['path'];
-							$result['path'] = rtrim($relativeMountPoint . $result['path'], '/');
-							$path = rtrim($mountPoint . $internalPath, '/');
-							$ownerId = $storage->getOwner($internalPath);
-							if ($ownerId !== false) {
-								$owner = $userManager->get($ownerId);
-							} else {
-								$owner = null;
-							}
-							$files[] = new FileInfo($path, $storage, $internalPath, $result, $mount, $owner);
-						}
-					}
-				}
-			}
-		}
-		return $files;
-	}
-
-	/**
-	 * Get the owner for a file or folder
-	 *
-	 * @throws NotFoundException
-	 */
-	public function getOwner(string $path): string {
-		$info = $this->getFileInfo($path);
-		if (!$info) {
-			throw new NotFoundException($path . ' not found while trying to get owner');
-		}
-
-		if ($info->getOwner() === null) {
-			throw new NotFoundException($path . ' has no owner');
-		}
-
-		return $info->getOwner()->getUID();
-	}
-
-	/**
-	 * get the ETag for a file or folder
-	 *
-	 * @param string $path
-	 * @return string|false
-	 */
-	public function getETag($path) {
-		[$storage, $internalPath] = $this->resolvePath($path);
-		if ($storage) {
-			return $storage->getETag($internalPath);
-		} else {
-			return false;
-		}
-	}
-
-	/**
-	 * Get the path of a file by id, relative to the view
-	 *
-	 * Note that the resulting path is not guaranteed to be unique for the id, multiple paths can point to the same file
-	 *
-	 * @param int $id
-	 * @param int|null $storageId
-	 * @return string
-	 * @throws NotFoundException
-	 */
-	public function getPath($id, ?int $storageId = null) {
-		$id = (int)$id;
-		$manager = Filesystem::getMountManager();
-		$mounts = $manager->findIn($this->fakeRoot);
-		$mounts[] = $manager->find($this->fakeRoot);
-		$mounts = array_filter($mounts);
-		// reverse the array, so we start with the storage this view is in
-		// which is the most likely to contain the file we're looking for
-		$mounts = array_reverse($mounts);
-
-		// put non-shared mounts in front of the shared mount
-		// this prevents unneeded recursion into shares
-		usort($mounts, function (IMountPoint $a, IMountPoint $b) {
-			return $a instanceof SharedMount && (!$b instanceof SharedMount) ? 1 : -1;
-		});
-
-		if (!is_null($storageId)) {
-			$mounts = array_filter($mounts, function (IMountPoint $mount) use ($storageId) {
-				return $mount->getNumericStorageId() === $storageId;
-			});
-		}
-
-		foreach ($mounts as $mount) {
-			/**
-			 * @var \OC\Files\Mount\MountPoint $mount
-			 */
-			if ($mount->getStorage()) {
-				$cache = $mount->getStorage()->getCache();
-				$internalPath = $cache->getPathById($id);
-				if (is_string($internalPath)) {
-					$fullPath = $mount->getMountPoint() . $internalPath;
-					if (!is_null($path = $this->getRelativePath($fullPath))) {
-						return $path;
-					}
-				}
-			}
-		}
-		throw new NotFoundException(sprintf('File with id "%s" has not been found.', $id));
-	}
-
-	/**
-	 * @param string $path
-	 * @throws InvalidPathException
-	 */
-	private function assertPathLength($path): void {
-		$maxLen = min(PHP_MAXPATHLEN, 4000);
-		// Check for the string length - performed using isset() instead of strlen()
-		// because isset() is about 5x-40x faster.
-		if (isset($path[$maxLen])) {
-			$pathLen = strlen($path);
-			throw new InvalidPathException("Path length($pathLen) exceeds max path length($maxLen): $path");
-		}
-	}
-
-	/**
-	 * check if it is allowed to move a mount point to a given target.
-	 * It is not allowed to move a mount point into a different mount point or
-	 * into an already shared folder
-	 */
-	private function targetIsNotShared(string $user, string $targetPath): bool {
-		$providers = [
-			IShare::TYPE_USER,
-			IShare::TYPE_GROUP,
-			IShare::TYPE_EMAIL,
-			IShare::TYPE_CIRCLE,
-			IShare::TYPE_ROOM,
-			IShare::TYPE_DECK,
-			IShare::TYPE_SCIENCEMESH
-		];
-		$shareManager = Server::get(IManager::class);
-		/** @var IShare[] $shares */
-		$shares = array_merge(...array_map(function (int $type) use ($shareManager, $user) {
-			return $shareManager->getSharesBy($user, $type);
-		}, $providers));
-
-		foreach ($shares as $share) {
-			$sharedPath = $share->getNode()->getPath();
-			if ($targetPath === $sharedPath || str_starts_with($targetPath, $sharedPath . '/')) {
-				$this->logger->debug(
-					'It is not allowed to move one mount point into a shared folder',
-					['app' => 'files']);
-				return false;
-			}
-		}
-
-		return true;
-	}
-
-	/**
-	 * Get a fileinfo object for files that are ignored in the cache (part files)
-	 */
-	private function getPartFileInfo(string $path): \OC\Files\FileInfo {
-		$mount = $this->getMount($path);
-		$storage = $mount->getStorage();
-		$internalPath = $mount->getInternalPath($this->getAbsolutePath($path));
-		$ownerId = $storage->getOwner($internalPath);
-		if ($ownerId !== false) {
-			$owner = Server::get(IUserManager::class)->get($ownerId);
-		} else {
-			$owner = null;
-		}
-		return new FileInfo(
-			$this->getAbsolutePath($path),
-			$storage,
-			$internalPath,
-			[
-				'fileid' => null,
-				'mimetype' => $storage->getMimeType($internalPath),
-				'name' => basename($path),
-				'etag' => null,
-				'size' => $storage->filesize($internalPath),
-				'mtime' => $storage->filemtime($internalPath),
-				'encrypted' => false,
-				'permissions' => \OCP\Constants::PERMISSION_ALL
-			],
-			$mount,
-			$owner
-		);
-	}
-
-	/**
-	 * @param string $path
-	 * @param string $fileName
-	 * @param bool $readonly Check only if the path is allowed for read-only access
-	 * @throws InvalidPathException
-	 */
-	public function verifyPath($path, $fileName, $readonly = false): void {
-		// All of the view's functions disallow '..' in the path so we can short cut if the path is invalid
-		if (!Filesystem::isValidPath($path ?: '/')) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($l->t('Path contains invalid segments'));
-		}
-
-		// Short cut for read-only validation
-		if ($readonly) {
-			$validator = Server::get(FilenameValidator::class);
-			if ($validator->isForbidden($fileName)) {
-				$l = \OCP\Util::getL10N('lib');
-				throw new InvalidPathException($l->t('Filename is a reserved word'));
-			}
-			return;
-		}
-
-		try {
-			/** @type \OCP\Files\Storage $storage */
-			[$storage, $internalPath] = $this->resolvePath($path);
-			$storage->verifyPath($internalPath, $fileName);
-		} catch (ReservedWordException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($ex->getMessage() ?: $l->t('Filename is a reserved word'));
-		} catch (InvalidCharacterInPathException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($ex->getMessage() ?: $l->t('Filename contains at least one invalid character'));
-		} catch (FileNameTooLongException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($l->t('Filename is too long'));
-		} catch (InvalidDirectoryException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($l->t('Dot files are not allowed'));
-		} catch (EmptyFileNameException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($l->t('Empty filename is not allowed'));
-		}
-	}
-
-	/**
-	 * get all parent folders of $path
-	 *
-	 * @param string $path
-	 * @return string[]
-	 */
-	private function getParents($path) {
-		$path = trim($path, '/');
-		if (!$path) {
-			return [];
-		}
-
-		$parts = explode('/', $path);
-
-		// remove the single file
-		array_pop($parts);
-		$result = ['/'];
-		$resultPath = '';
-		foreach ($parts as $part) {
-			if ($part) {
-				$resultPath .= '/' . $part;
-				$result[] = $resultPath;
-			}
-		}
-		return $result;
-	}
-
-	/**
-	 * Returns the mount point for which to lock
-	 *
-	 * @param string $absolutePath absolute path
-	 * @param bool $useParentMount true to return parent mount instead of whatever
-	 *                             is mounted directly on the given path, false otherwise
-	 * @return IMountPoint mount point for which to apply locks
-	 */
-	private function getMountForLock(string $absolutePath, bool $useParentMount = false): IMountPoint {
-		$mount = Filesystem::getMountManager()->find($absolutePath);
-
-		if ($useParentMount) {
-			// find out if something is mounted directly on the path
-			$internalPath = $mount->getInternalPath($absolutePath);
-			if ($internalPath === '') {
-				// resolve the parent mount instead
-				$mount = Filesystem::getMountManager()->find(dirname($absolutePath));
-			}
-		}
-
-		return $mount;
-	}
-
-	/**
-	 * Lock the given path
-	 *
-	 * @param string $path the path of the file to lock, relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException if the path is already locked
-	 */
-	private function lockPath($path, $type, $lockMountPoint = false) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$mount = $this->getMountForLock($absolutePath, $lockMountPoint);
-		try {
-			$storage = $mount->getStorage();
-			if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
-				$storage->acquireLock(
-					$mount->getInternalPath($absolutePath),
-					$type,
-					$this->lockingProvider
-				);
-			}
-		} catch (LockedException $e) {
-			// rethrow with the human-readable path
-			throw new LockedException(
-				$path,
-				$e,
-				$e->getExistingLock()
-			);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Change the lock type
-	 *
-	 * @param string $path the path of the file to lock, relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException if the path is already locked
-	 */
-	public function changeLock($path, $type, $lockMountPoint = false) {
-		$path = Filesystem::normalizePath($path);
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$mount = $this->getMountForLock($absolutePath, $lockMountPoint);
-		try {
-			$storage = $mount->getStorage();
-			if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
-				$storage->changeLock(
-					$mount->getInternalPath($absolutePath),
-					$type,
-					$this->lockingProvider
-				);
-			}
-		} catch (LockedException $e) {
-			// rethrow with the a human-readable path
-			throw new LockedException(
-				$path,
-				$e,
-				$e->getExistingLock()
-			);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Unlock the given path
-	 *
-	 * @param string $path the path of the file to unlock, relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException
-	 */
-	private function unlockPath($path, $type, $lockMountPoint = false) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$mount = $this->getMountForLock($absolutePath, $lockMountPoint);
-		$storage = $mount->getStorage();
-		if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
-			$storage->releaseLock(
-				$mount->getInternalPath($absolutePath),
-				$type,
-				$this->lockingProvider
-			);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Lock a path and all its parents up to the root of the view
-	 *
-	 * @param string $path the path of the file to lock relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException
-	 */
-	public function lockFile($path, $type, $lockMountPoint = false) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$this->lockPath($path, $type, $lockMountPoint);
-
-		$parents = $this->getParents($path);
-		foreach ($parents as $parent) {
-			$this->lockPath($parent, ILockingProvider::LOCK_SHARED);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Unlock a path and all its parents up to the root of the view
-	 *
-	 * @param string $path the path of the file to lock relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException
-	 */
-	public function unlockFile($path, $type, $lockMountPoint = false) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$this->unlockPath($path, $type, $lockMountPoint);
-
-		$parents = $this->getParents($path);
-		foreach ($parents as $parent) {
-			$this->unlockPath($parent, ILockingProvider::LOCK_SHARED);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Only lock files in data/user/files/
-	 *
-	 * @param string $path Absolute path to the file/folder we try to (un)lock
-	 * @return bool
-	 */
-	protected function shouldLockFile($path) {
-		$path = Filesystem::normalizePath($path);
-
-		$pathSegments = explode('/', $path);
-		if (isset($pathSegments[2])) {
-			// E.g.: /username/files/path-to-file
-			return ($pathSegments[2] === 'files') && (count($pathSegments) > 3);
-		}
-
-		return !str_starts_with($path, '/appdata_');
-	}
-
-	/**
-	 * Shortens the given absolute path to be relative to
-	 * "$user/files".
-	 *
-	 * @param string $absolutePath absolute path which is under "files"
-	 *
-	 * @return string path relative to "files" with trimmed slashes or null
-	 *                if the path was NOT relative to files
-	 *
-	 * @throws \InvalidArgumentException if the given path was not under "files"
-	 * @since 8.1.0
-	 */
-	public function getPathRelativeToFiles($absolutePath) {
-		$path = Filesystem::normalizePath($absolutePath);
-		$parts = explode('/', trim($path, '/'), 3);
-		// "$user", "files", "path/to/dir"
-		if (!isset($parts[1]) || $parts[1] !== 'files') {
-			$this->logger->error(
-				'$absolutePath must be relative to "files", value is "{absolutePath}"',
-				[
-					'absolutePath' => $absolutePath,
-				]
-			);
-			throw new \InvalidArgumentException('$absolutePath must be relative to "files"');
-		}
-		if (isset($parts[2])) {
-			return $parts[2];
-		}
-		return '';
-	}
-
-	/**
-	 * @param string $filename
-	 * @return array
-	 * @throws \OC\User\NoUserException
-	 * @throws NotFoundException
-	 */
-	public function getUidAndFilename($filename) {
-		$info = $this->getFileInfo($filename);
-		if (!$info instanceof \OCP\Files\FileInfo) {
-			throw new NotFoundException($this->getAbsolutePath($filename) . ' not found');
-		}
-		$uid = $info->getOwner()->getUID();
-		if ($uid != \OC_User::getUser()) {
-			Filesystem::initMountPoints($uid);
-			$ownerView = new View('/' . $uid . '/files');
-			try {
-				$filename = $ownerView->getPath($info['fileid']);
-			} catch (NotFoundException $e) {
-				throw new NotFoundException('File with id ' . $info['fileid'] . ' not found for user ' . $uid);
-			}
-		}
-		return [$uid, $filename];
-	}
-
-	/**
-	 * Creates parent non-existing folders
-	 *
-	 * @param string $filePath
-	 * @return bool
-	 */
-	private function createParentDirectories($filePath) {
-		$directoryParts = explode('/', $filePath);
-		$directoryParts = array_filter($directoryParts);
-		foreach ($directoryParts as $key => $part) {
-			$currentPathElements = array_slice($directoryParts, 0, $key);
-			$currentPath = '/' . implode('/', $currentPathElements);
-			if ($this->is_file($currentPath)) {
-				return false;
-			}
-			if (!$this->file_exists($currentPath)) {
-				$this->mkdir($currentPath);
-			}
-		}
-
-		return true;
-	}
+    private string $fakeRoot = '';
+    private ILockingProvider $lockingProvider;
+    private bool $lockingEnabled;
+    private bool $updaterEnabled = true;
+    private UserManager $userManager;
+    private LoggerInterface $logger;
+
+    /**
+     * @throws \Exception If $root contains an invalid path
+     */
+    public function __construct(string $root = '') {
+        if (!Filesystem::isValidPath($root)) {
+            throw new \Exception();
+        }
+
+        $this->fakeRoot = $root;
+        $this->lockingProvider = \OC::$server->get(ILockingProvider::class);
+        $this->lockingEnabled = !($this->lockingProvider instanceof \OC\Lock\NoopLockingProvider);
+        $this->userManager = \OC::$server->getUserManager();
+        $this->logger = \OC::$server->get(LoggerInterface::class);
+    }
+
+    /**
+     * @param ?string $path
+     * @psalm-template S as string|null
+     * @psalm-param S $path
+     * @psalm-return (S is string ? string : null)
+     */
+    public function getAbsolutePath($path = '/'): ?string {
+        if ($path === null) {
+            return null;
+        }
+        $this->assertPathLength($path);
+        if ($path === '') {
+            $path = '/';
+        }
+        if ($path[0] !== '/') {
+            $path = '/' . $path;
+        }
+        return $this->fakeRoot . $path;
+    }
+
+    /**
+     * Change the root to a fake root
+     *
+     * @param string $fakeRoot
+     */
+    public function chroot($fakeRoot): void {
+        if (!$fakeRoot == '') {
+            if ($fakeRoot[0] !== '/') {
+                $fakeRoot = '/' . $fakeRoot;
+            }
+        }
+        $this->fakeRoot = $fakeRoot;
+    }
+
+    /**
+     * Get the fake root
+     */
+    public function getRoot(): string {
+        return $this->fakeRoot;
+    }
+
+    /**
+     * get path relative to the root of the view
+     *
+     * @param string $path
+     */
+    public function getRelativePath($path): ?string {
+        $this->assertPathLength($path);
+        if ($this->fakeRoot == '') {
+            return $path;
+        }
+
+        if (rtrim($path, '/') === rtrim($this->fakeRoot, '/')) {
+            return '/';
+        }
+
+        // missing slashes can cause wrong matches!
+        $root = rtrim($this->fakeRoot, '/') . '/';
+
+        if (!str_starts_with($path, $root)) {
+            return null;
+        } else {
+            $path = substr($path, strlen($this->fakeRoot));
+            if (strlen($path) === 0) {
+                return '/';
+            } else {
+                return $path;
+            }
+        }
+    }
+
+    /**
+     * Get the mountpoint of the storage object for a path
+     * ( note: because a storage is not always mounted inside the fakeroot, the
+     * returned mountpoint is relative to the absolute root of the filesystem
+     * and does not take the chroot into account )
+     *
+     * @param string $path
+     */
+    public function getMountPoint($path): string {
+        return Filesystem::getMountPoint($this->getAbsolutePath($path));
+    }
+
+    /**
+     * Get the mountpoint of the storage object for a path
+     * ( note: because a storage is not always mounted inside the fakeroot, the
+     * returned mountpoint is relative to the absolute root of the filesystem
+     * and does not take the chroot into account )
+     *
+     * @param string $path
+     */
+    public function getMount($path): IMountPoint {
+        return Filesystem::getMountManager()->find($this->getAbsolutePath($path));
+    }
+
+    /**
+     * Resolve a path to a storage and internal path
+     *
+     * @param string $path
+     * @return array{?\OCP\Files\Storage\IStorage, string} an array consisting of the storage and the internal path
+     */
+    public function resolvePath($path): array {
+        $a = $this->getAbsolutePath($path);
+        $p = Filesystem::normalizePath($a);
+        return Filesystem::resolvePath($p);
+    }
+
+    /**
+     * Return the path to a local version of the file
+     * we need this because we can't know if a file is stored local or not from
+     * outside the filestorage and for some purposes a local file is needed
+     *
+     * @param string $path
+     */
+    public function getLocalFile($path): string|false {
+        $parent = substr($path, 0, strrpos($path, '/') ?: 0);
+        $path = $this->getAbsolutePath($path);
+        [$storage, $internalPath] = Filesystem::resolvePath($path);
+        if (Filesystem::isValidPath($parent) && $storage) {
+            return $storage->getLocalFile($internalPath);
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * the following functions operate with arguments and return values identical
+     * to those of their PHP built-in equivalents. Mostly they are merely wrappers
+     * for \OC\Files\Storage\Storage via basicOperation().
+     */
+    public function mkdir($path) {
+        return $this->basicOperation('mkdir', $path, ['create', 'write']);
+    }
+
+    /**
+     * remove mount point
+     *
+     * @param IMountPoint $mount
+     * @param string $path relative to data/
+     */
+    protected function removeMount($mount, $path): bool {
+        if ($mount instanceof MoveableMount) {
+            // cut of /user/files to get the relative path to data/user/files
+            $pathParts = explode('/', $path, 4);
+            $relPath = '/' . $pathParts[3];
+            $this->lockFile($relPath, ILockingProvider::LOCK_SHARED, true);
+            \OC_Hook::emit(
+                Filesystem::CLASSNAME, 'umount',
+                [Filesystem::signal_param_path => $relPath]
+            );
+            $this->changeLock($relPath, ILockingProvider::LOCK_EXCLUSIVE, true);
+            $result = $mount->removeMount();
+            $this->changeLock($relPath, ILockingProvider::LOCK_SHARED, true);
+            if ($result) {
+                \OC_Hook::emit(
+                    Filesystem::CLASSNAME, 'post_umount',
+                    [Filesystem::signal_param_path => $relPath]
+                );
+            }
+            $this->unlockFile($relPath, ILockingProvider::LOCK_SHARED, true);
+            return $result;
+        } else {
+            // do not allow deleting the storage's root / the mount point
+            // because for some storages it might delete the whole contents
+            // but isn't supposed to work that way
+            return false;
+        }
+    }
+
+    public function disableCacheUpdate(): void {
+        $this->updaterEnabled = false;
+    }
+
+    public function enableCacheUpdate(): void {
+        $this->updaterEnabled = true;
+    }
+
+    protected function writeUpdate(Storage $storage, string $internalPath, ?int $time = null, ?int $sizeDifference = null): void {
+        if ($this->updaterEnabled) {
+            if (is_null($time)) {
+                $time = time();
+            }
+            $storage->getUpdater()->update($internalPath, $time, $sizeDifference);
+        }
+    }
+
+    protected function removeUpdate(Storage $storage, string $internalPath): void {
+        if ($this->updaterEnabled) {
+            $storage->getUpdater()->remove($internalPath);
+        }
+    }
+
+    protected function renameUpdate(Storage $sourceStorage, Storage $targetStorage, string $sourceInternalPath, string $targetInternalPath): void {
+        if ($this->updaterEnabled) {
+            $targetStorage->getUpdater()->renameFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
+        }
+    }
+
+    protected function copyUpdate(Storage $sourceStorage, Storage $targetStorage, string $sourceInternalPath, string $targetInternalPath): void {
+        if ($this->updaterEnabled) {
+            $targetStorage->getUpdater()->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
+        }
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function rmdir($path) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $mount = Filesystem::getMountManager()->find($absolutePath);
+        if ($mount->getInternalPath($absolutePath) === '') {
+            return $this->removeMount($mount, $absolutePath);
+        }
+        if ($this->is_dir($path)) {
+            $result = $this->basicOperation('rmdir', $path, ['delete']);
+        } else {
+            $result = false;
+        }
+
+        if (!$result && !$this->file_exists($path)) { //clear ghost files from the cache on delete
+            $storage = $mount->getStorage();
+            $internalPath = $mount->getInternalPath($absolutePath);
+            $storage->getUpdater()->remove($internalPath);
+        }
+        return $result;
+    }
+
+    /**
+     * @param string $path
+     * @return resource|false
+     */
+    public function opendir($path) {
+        return $this->basicOperation('opendir', $path, ['read']);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function is_dir($path) {
+        if ($path == '/') {
+            return true;
+        }
+        return $this->basicOperation('is_dir', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function is_file($path) {
+        if ($path == '/') {
+            return false;
+        }
+        return $this->basicOperation('is_file', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function stat($path) {
+        return $this->basicOperation('stat', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function filetype($path) {
+        return $this->basicOperation('filetype', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function filesize(string $path) {
+        return $this->basicOperation('filesize', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     * @throws InvalidPathException
+     */
+    public function readfile($path) {
+        $this->assertPathLength($path);
+        if (ob_get_level()) {
+            ob_end_clean();
+        }
+        $handle = $this->fopen($path, 'rb');
+        if ($handle) {
+            $chunkSize = 524288; // 512 kiB chunks
+            while (!feof($handle)) {
+                echo fread($handle, $chunkSize);
+                flush();
+                $this->checkConnectionStatus();
+            }
+            fclose($handle);
+            return $this->filesize($path);
+        }
+        return false;
+    }
+
+    /**
+     * @param string $path
+     * @param int $from
+     * @param int $to
+     * @return bool|mixed
+     * @throws InvalidPathException
+     * @throws \OCP\Files\UnseekableException
+     */
+    public function readfilePart($path, $from, $to) {
+        $this->assertPathLength($path);
+        if (ob_get_level()) {
+            ob_end_clean();
+        }
+        $handle = $this->fopen($path, 'rb');
+        if ($handle) {
+            $chunkSize = 524288; // 512 kiB chunks
+            $startReading = true;
+
+            if ($from !== 0 && $from !== '0' && fseek($handle, $from) !== 0) {
+                // forward file handle via chunked fread because fseek seem to have failed
+
+                $end = $from + 1;
+                while (!feof($handle) && ftell($handle) < $end && ftell($handle) !== $from) {
+                    $len = $from - ftell($handle);
+                    if ($len > $chunkSize) {
+                        $len = $chunkSize;
+                    }
+                    $result = fread($handle, $len);
+
+                    if ($result === false) {
+                        $startReading = false;
+                        break;
+                    }
+                }
+            }
+
+            if ($startReading) {
+                $end = $to + 1;
+                while (!feof($handle) && ftell($handle) < $end) {
+                    $len = $end - ftell($handle);
+                    if ($len > $chunkSize) {
+                        $len = $chunkSize;
+                    }
+                    echo fread($handle, $len);
+                    flush();
+                    $this->checkConnectionStatus();
+                }
+                return ftell($handle) - $from;
+            }
+
+            throw new \OCP\Files\UnseekableException('fseek error');
+        }
+        return false;
+    }
+
+    private function checkConnectionStatus(): void {
+        $connectionStatus = \connection_status();
+        if ($connectionStatus !== CONNECTION_NORMAL) {
+            throw new ConnectionLostException("Connection lost. Status: $connectionStatus");
+        }
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function isCreatable($path) {
+        return $this->basicOperation('isCreatable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function isReadable($path) {
+        return $this->basicOperation('isReadable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function isUpdatable($path) {
+        return $this->basicOperation('isUpdatable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function isDeletable($path) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $mount = Filesystem::getMountManager()->find($absolutePath);
+        if ($mount->getInternalPath($absolutePath) === '') {
+            return $mount instanceof MoveableMount;
+        }
+        return $this->basicOperation('isDeletable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function isSharable($path) {
+        return $this->basicOperation('isSharable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function file_exists($path) {
+        if ($path == '/') {
+            return true;
+        }
+        return $this->basicOperation('file_exists', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function filemtime($path) {
+        return $this->basicOperation('filemtime', $path);
+    }
+
+    /**
+     * @param string $path
+     * @param int|string $mtime
+     */
+    public function touch($path, $mtime = null): bool {
+        if (!is_null($mtime) && !is_numeric($mtime)) {
+            $mtime = strtotime($mtime);
+        }
+
+        $hooks = ['touch'];
+
+        if (!$this->file_exists($path)) {
+            $hooks[] = 'create';
+            $hooks[] = 'write';
+        }
+        try {
+            $result = $this->basicOperation('touch', $path, $hooks, $mtime);
+        } catch (\Exception $e) {
+            $this->logger->info('Error while setting modified time', ['app' => 'core', 'exception' => $e]);
+            $result = false;
+        }
+        if (!$result) {
+            // If create file fails because of permissions on external storage like SMB folders,
+            // check file exists and return false if not.
+            if (!$this->file_exists($path)) {
+                return false;
+            }
+            if (is_null($mtime)) {
+                $mtime = time();
+            }
+            //if native touch fails, we emulate it by changing the mtime in the cache
+            $this->putFileInfo($path, ['mtime' => floor($mtime)]);
+        }
+        return true;
+    }
+
+    /**
+     * @param string $path
+     * @return string|false
+     * @throws LockedException
+     */
+    public function file_get_contents($path) {
+        return $this->basicOperation('file_get_contents', $path, ['read']);
+    }
+
+    protected function emit_file_hooks_pre(bool $exists, string $path, bool &$run): void {
+        if (!$exists) {
+            \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_create, [
+                Filesystem::signal_param_path => $this->getHookPath($path),
+                Filesystem::signal_param_run => &$run,
+            ]);
+        } else {
+            \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_update, [
+                Filesystem::signal_param_path => $this->getHookPath($path),
+                Filesystem::signal_param_run => &$run,
+            ]);
+        }
+        \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_write, [
+            Filesystem::signal_param_path => $this->getHookPath($path),
+            Filesystem::signal_param_run => &$run,
+        ]);
+    }
+
+    protected function emit_file_hooks_post(bool $exists, string $path): void {
+        if (!$exists) {
+            \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_create, [
+                Filesystem::signal_param_path => $this->getHookPath($path),
+            ]);
+        } else {
+            \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_update, [
+                Filesystem::signal_param_path => $this->getHookPath($path),
+            ]);
+        }
+        \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_write, [
+            Filesystem::signal_param_path => $this->getHookPath($path),
+        ]);
+    }
+
+    /**
+     * @param string $path
+     * @param string|resource $data
+     * @return bool|mixed
+     * @throws LockedException
+     */
+    public function file_put_contents($path, $data) {
+        if (is_resource($data)) { //not having to deal with streams in file_put_contents makes life easier
+            $absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
+            if (Filesystem::isValidPath($path)
+                && !Filesystem::isFileBlacklisted($path)
+            ) {
+                $path = $this->getRelativePath($absolutePath);
+                if ($path === null) {
+                    throw new InvalidPathException("Path $absolutePath is not in the expected root");
+                }
+
+                $this->lockFile($path, ILockingProvider::LOCK_SHARED);
+
+                $exists = $this->file_exists($path);
+                if ($this->shouldEmitHooks($path)) {
+                    $run = true;
+                    $this->emit_file_hooks_pre($exists, $path, $run);
+                    if (!$run) {
+                        $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                        return false;
+                    }
+                }
+
+                try {
+                    $this->changeLock($path, ILockingProvider::LOCK_EXCLUSIVE);
+                } catch (\Exception $e) {
+                    // Release the shared lock before throwing.
+                    $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                    throw $e;
+                }
+
+                /** @var Storage $storage */
+                [$storage, $internalPath] = $this->resolvePath($path);
+                $target = $storage->fopen($internalPath, 'w');
+                if ($target) {
+                    [, $result] = Files::streamCopy($data, $target, true);
+                    fclose($target);
+                    fclose($data);
+
+                    $this->writeUpdate($storage, $internalPath);
+
+                    $this->changeLock($path, ILockingProvider::LOCK_SHARED);
+
+                    if ($this->shouldEmitHooks($path) && $result !== false) {
+                        $this->emit_file_hooks_post($exists, $path);
+                    }
+                    $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                    return $result;
+                } else {
+                    $this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
+                    return false;
+                }
+            } else {
+                return false;
+            }
+        } else {
+            $hooks = $this->file_exists($path) ? ['update', 'write'] : ['create', 'write'];
+            return $this->basicOperation('file_put_contents', $path, $hooks, $data);
+        }
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function unlink($path) {
+        if ($path === '' || $path === '/') {
+            // do not allow deleting the root
+            return false;
+        }
+        $postFix = (substr($path, -1) === '/') ? '/' : '';
+        $absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
+        $mount = Filesystem::getMountManager()->find($absolutePath . $postFix);
+        if ($mount->getInternalPath($absolutePath) === '') {
+            return $this->removeMount($mount, $absolutePath);
+        }
+        if ($this->is_dir($path)) {
+            $result = $this->basicOperation('rmdir', $path, ['delete']);
+        } else {
+            $result = $this->basicOperation('unlink', $path, ['delete']);
+        }
+        if (!$result && !$this->file_exists($path)) { //clear ghost files from the cache on delete
+            $storage = $mount->getStorage();
+            $internalPath = $mount->getInternalPath($absolutePath);
+            $storage->getUpdater()->remove($internalPath);
+            return true;
+        } else {
+            return $result;
+        }
+    }
+
+    /**
+     * @param string $directory
+     * @return bool|mixed
+     */
+    public function deleteAll($directory) {
+        return $this->rmdir($directory);
+    }
+
+    /**
+     * Rename/move a file or folder from the source path to target path.
+     *
+     * @param string $source source path
+     * @param string $target target path
+     * @param array $options
+     *
+     * @return bool|mixed
+     * @throws LockedException
+     */
+    public function rename($source, $target, array $options = []) {
+        $checkSubMounts = $options['checkSubMounts'] ?? true;
+
+        $absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
+        $absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
+
+        if (str_starts_with($absolutePath2, $absolutePath1 . '/')) {
+            throw new ForbiddenException('Moving a folder into a child folder is forbidden', false);
+        }
+
+        /** @var IMountManager $mountManager */
+        $mountManager = \OC::$server->get(IMountManager::class);
+
+        $targetParts = explode('/', $absolutePath2);
+        $targetUser = $targetParts[1] ?? null;
+        $result = false;
+        if (
+            Filesystem::isValidPath($target)
+            && Filesystem::isValidPath($source)
+            && !Filesystem::isFileBlacklisted($target)
+        ) {
+            $source = $this->getRelativePath($absolutePath1);
+            $target = $this->getRelativePath($absolutePath2);
+            $exists = $this->file_exists($target);
+
+            if ($source == null || $target == null) {
+                return false;
+            }
+
+            try {
+                $this->verifyPath(dirname($target), basename($target));
+            } catch (InvalidPathException) {
+                return false;
+            }
+
+            $this->lockFile($source, ILockingProvider::LOCK_SHARED, true);
+            try {
+                $this->lockFile($target, ILockingProvider::LOCK_SHARED, true);
+
+                $run = true;
+                if ($this->shouldEmitHooks($source) && (Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target))) {
+                    // if it was a rename from a part file to a regular file it was a write and not a rename operation
+                    $this->emit_file_hooks_pre($exists, $target, $run);
+                } elseif ($this->shouldEmitHooks($source)) {
+                    $sourcePath = $this->getHookPath($source);
+                    $targetPath = $this->getHookPath($target);
+                    if ($sourcePath !== null && $targetPath !== null) {
+                        \OC_Hook::emit(
+                            Filesystem::CLASSNAME, Filesystem::signal_rename,
+                            [
+                                Filesystem::signal_param_oldpath => $sourcePath,
+                                Filesystem::signal_param_newpath => $targetPath,
+                                Filesystem::signal_param_run => &$run
+                            ]
+                        );
+                    }
+                }
+                if ($run) {
+                    $manager = Filesystem::getMountManager();
+                    $mount1 = $this->getMount($source);
+                    $mount2 = $this->getMount($target);
+                    $storage1 = $mount1->getStorage();
+                    $storage2 = $mount2->getStorage();
+                    $internalPath1 = $mount1->getInternalPath($absolutePath1);
+                    $internalPath2 = $mount2->getInternalPath($absolutePath2);
+
+                    $this->changeLock($source, ILockingProvider::LOCK_EXCLUSIVE, true);
+                    try {
+                        $this->changeLock($target, ILockingProvider::LOCK_EXCLUSIVE, true);
+
+                        if ($checkSubMounts) {
+                            $movedMounts = $mountManager->findIn($this->getAbsolutePath($source));
+                        } else {
+                            $movedMounts = [];
+                        }
+
+                        if ($internalPath1 === '') {
+                            $sourceParentMount = $this->getMount(dirname($source));
+                            $movedMounts[] = $mount1;
+                            $this->validateMountMove($movedMounts, $sourceParentMount, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
+                            /**
+                             * @var \OC\Files\Mount\MountPoint | \OC\Files\Mount\MoveableMount $mount1
+                             */
+                            $sourceMountPoint = $mount1->getMountPoint();
+                            $result = $mount1->moveMount($absolutePath2);
+                            $manager->moveMount($sourceMountPoint, $mount1->getMountPoint());
+
+                            // moving a file/folder within the same mount point
+                        } elseif ($storage1 === $storage2) {
+                            if (count($movedMounts) > 0) {
+                                $this->validateMountMove($movedMounts, $mount1, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
+                            }
+                            if ($storage1) {
+                                $result = $storage1->rename($internalPath1, $internalPath2);
+                            } else {
+                                $result = false;
+                            }
+                            // moving a file/folder between storages (from $storage1 to $storage2)
+                        } else {
+                            if (count($movedMounts) > 0) {
+                                $this->validateMountMove($movedMounts, $mount1, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
+                            }
+                            $result = $storage2->moveFromStorage($storage1, $internalPath1, $internalPath2);
+                        }
+
+                        if ((Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target)) && $result !== false) {
+                            // if it was a rename from a part file to a regular file it was a write and not a rename operation
+                            $this->writeUpdate($storage2, $internalPath2);
+                        } elseif ($result) {
+                            if ($internalPath1 !== '') { // don't do a cache update for moved mounts
+                                $this->renameUpdate($storage1, $storage2, $internalPath1, $internalPath2);
+                            }
+                        }
+                    } catch (\Exception $e) {
+                        throw $e;
+                    } finally {
+                        $this->changeLock($source, ILockingProvider::LOCK_SHARED, true);
+                        $this->changeLock($target, ILockingProvider::LOCK_SHARED, true);
+                    }
+
+                    if ((Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target)) && $result !== false) {
+                        if ($this->shouldEmitHooks()) {
+                            $this->emit_file_hooks_post($exists, $target);
+                        }
+                    } elseif ($result) {
+                        if ($this->shouldEmitHooks($source) && $this->shouldEmitHooks($target)) {
+                            $sourcePath = $this->getHookPath($source);
+                            $targetPath = $this->getHookPath($target);
+                            if ($sourcePath !== null && $targetPath !== null) {
+                                \OC_Hook::emit(
+                                    Filesystem::CLASSNAME,
+                                    Filesystem::signal_post_rename,
+                                    [
+                                        Filesystem::signal_param_oldpath => $sourcePath,
+                                        Filesystem::signal_param_newpath => $targetPath,
+                                    ]
+                                );
+                            }
+                        }
+                    }
+                }
+            } catch (\Exception $e) {
+                throw $e;
+            } finally {
+                $this->unlockFile($source, ILockingProvider::LOCK_SHARED, true);
+                $this->unlockFile($target, ILockingProvider::LOCK_SHARED, true);
+            }
+        }
+        return $result;
+    }
+
+    /**
+     * @throws ForbiddenException
+     */
+    private function validateMountMove(array $mounts, IMountPoint $sourceMount, IMountPoint $targetMount, bool $targetIsShared): void {
+        $targetPath = $this->getRelativePath($targetMount->getMountPoint());
+        if ($targetPath) {
+            $targetPath = trim($targetPath, '/');
+        } else {
+            $targetPath = $targetMount->getMountPoint();
+        }
+
+        $l = \OC::$server->get(IFactory::class)->get('files');
+        foreach ($mounts as $mount) {
+            $sourcePath = $this->getRelativePath($mount->getMountPoint());
+            if ($sourcePath) {
+                $sourcePath = trim($sourcePath, '/');
+            } else {
+                $sourcePath = $mount->getMountPoint();
+            }
+
+            if (!$mount instanceof MoveableMount) {
+                throw new ForbiddenException($l->t('Storage %s cannot be moved', [$sourcePath]), false);
+            }
+
+            if ($targetIsShared) {
+                if ($sourceMount instanceof SharedMount) {
+                    throw new ForbiddenException($l->t('Moving a share (%s) into a shared folder is not allowed', [$sourcePath]), false);
+                } else {
+                    throw new ForbiddenException($l->t('Moving a storage (%s) into a shared folder is not allowed', [$sourcePath]), false);
+                }
+            }
+
+            if ($sourceMount !== $targetMount) {
+                if ($sourceMount instanceof SharedMount) {
+                    if ($targetMount instanceof SharedMount) {
+                        throw new ForbiddenException($l->t('Moving a share (%s) into another share (%s) is not allowed', [$sourcePath, $targetPath]), false);
+                    } else {
+                        throw new ForbiddenException($l->t('Moving a share (%s) into another storage (%s) is not allowed', [$sourcePath, $targetPath]), false);
+                    }
+                } else {
+                    if ($targetMount instanceof SharedMount) {
+                        throw new ForbiddenException($l->t('Moving a storage (%s) into a share (%s) is not allowed', [$sourcePath, $targetPath]), false);
+                    } else {
+                        throw new ForbiddenException($l->t('Moving a storage (%s) into another storage (%s) is not allowed', [$sourcePath, $targetPath]), false);
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Copy a file/folder from the source path to target path
+     *
+     * @param string $source source path
+     * @param string $target target path
+     * @param bool $preserveMtime whether to preserve mtime on the copy
+     *
+     * @return bool|mixed
+     */
+    public function copy($source, $target, $preserveMtime = false) {
+        $absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
+        $absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
+        $result = false;
+        if (
+            Filesystem::isValidPath($target)
+            && Filesystem::isValidPath($source)
+            && !Filesystem::isFileBlacklisted($target)
+        ) {
+            $source = $this->getRelativePath($absolutePath1);
+            $target = $this->getRelativePath($absolutePath2);
+
+            if ($source == null || $target == null) {
+                return false;
+            }
+            $run = true;
+
+            $this->lockFile($target, ILockingProvider::LOCK_SHARED);
+            $this->lockFile($source, ILockingProvider::LOCK_SHARED);
+            $lockTypePath1 = ILockingProvider::LOCK_SHARED;
+            $lockTypePath2 = ILockingProvider::LOCK_SHARED;
+
+            try {
+                $exists = $this->file_exists($target);
+                if ($this->shouldEmitHooks()) {
+                    \OC_Hook::emit(
+                        Filesystem::CLASSNAME,
+                        Filesystem::signal_copy,
+                        [
+                            Filesystem::signal_param_oldpath => $this->getHookPath($source),
+                            Filesystem::signal_param_newpath => $this->getHookPath($target),
+                            Filesystem::signal_param_run => &$run
+                        ]
+                    );
+                    $this->emit_file_hooks_pre($exists, $target, $run);
+                }
+                if ($run) {
+                    $mount1 = $this->getMount($source);
+                    $mount2 = $this->getMount($target);
+                    $storage1 = $mount1->getStorage();
+                    $internalPath1 = $mount1->getInternalPath($absolutePath1);
+                    $storage2 = $mount2->getStorage();
+                    $internalPath2 = $mount2->getInternalPath($absolutePath2);
+
+                    $this->changeLock($target, ILockingProvider::LOCK_EXCLUSIVE);
+                    $lockTypePath2 = ILockingProvider::LOCK_EXCLUSIVE;
+
+                    if ($mount1->getMountPoint() == $mount2->getMountPoint()) {
+                        if ($storage1) {
+                            $result = $storage1->copy($internalPath1, $internalPath2);
+                        } else {
+                            $result = false;
+                        }
+                    } else {
+                        $result = $storage2->copyFromStorage($storage1, $internalPath1, $internalPath2);
+                    }
+
+                    if ($result) {
+                        $this->copyUpdate($storage1, $storage2, $internalPath1, $internalPath2);
+                    }
+
+                    $this->changeLock($target, ILockingProvider::LOCK_SHARED);
+                    $lockTypePath2 = ILockingProvider::LOCK_SHARED;
+
+                    if ($this->shouldEmitHooks() && $result !== false) {
+                        \OC_Hook::emit(
+                            Filesystem::CLASSNAME,
+                            Filesystem::signal_post_copy,
+                            [
+                                Filesystem::signal_param_oldpath => $this->getHookPath($source),
+                                Filesystem::signal_param_newpath => $this->getHookPath($target)
+                            ]
+                        );
+                        $this->emit_file_hooks_post($exists, $target);
+                    }
+                }
+            } catch (\Exception $e) {
+                $this->unlockFile($target, $lockTypePath2);
+                $this->unlockFile($source, $lockTypePath1);
+                throw $e;
+            }
+
+            $this->unlockFile($target, $lockTypePath2);
+            $this->unlockFile($source, $lockTypePath1);
+        }
+        return $result;
+    }
+
+    /**
+     * @param string $path
+     * @param string $mode 'r' or 'w'
+     * @return resource|false
+     * @throws LockedException
+     */
+    public function fopen($path, $mode) {
+        $mode = str_replace('b', '', $mode); // the binary flag is a windows only feature which we do not support
+        $hooks = [];
+        switch ($mode) {
+            case 'r':
+                $hooks[] = 'read';
+                break;
+            case 'r+':
+            case 'w+':
+            case 'x+':
+            case 'a+':
+                $hooks[] = 'read';
+                $hooks[] = 'write';
+                break;
+            case 'w':
+            case 'x':
+            case 'a':
+                $hooks[] = 'write';
+                break;
+            default:
+                $this->logger->error('invalid mode (' . $mode . ') for ' . $path, ['app' => 'core']);
+        }
+
+        if ($mode !== 'r' && $mode !== 'w') {
+            $this->logger->info('Trying to open a file with a mode other than "r" or "w" can cause severe performance issues with some backends', ['app' => 'core']);
+        }
+
+        $handle = $this->basicOperation('fopen', $path, $hooks, $mode);
+        if (!is_resource($handle) && $mode === 'r') {
+            // trying to read a file that isn't on disk, check if the cache is out of sync and rescan if needed
+            $mount = $this->getMount($path);
+            $internalPath = $mount->getInternalPath($this->getAbsolutePath($path));
+            $storage = $mount->getStorage();
+            if ($storage->getCache()->inCache($internalPath) && !$storage->file_exists($path)) {
+                $this->writeUpdate($storage, $internalPath);
+            }
+        }
+        return $handle;
+    }
+
+    /**
+     * @param string $path
+     * @throws InvalidPathException
+     */
+    public function toTmpFile($path): string|false {
+        $this->assertPathLength($path);
+        if (Filesystem::isValidPath($path)) {
+            $source = $this->fopen($path, 'r');
+            if ($source) {
+                $extension = pathinfo($path, PATHINFO_EXTENSION);
+                $tmpFile = \OC::$server->getTempManager()->getTemporaryFile($extension);
+                file_put_contents($tmpFile, $source);
+                return $tmpFile;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * @param string $tmpFile
+     * @param string $path
+     * @return bool|mixed
+     * @throws InvalidPathException
+     */
+    public function fromTmpFile($tmpFile, $path) {
+        $this->assertPathLength($path);
+        if (Filesystem::isValidPath($path)) {
+            // Get directory that the file is going into
+            $filePath = dirname($path);
+
+            // Create the directories if any
+            if (!$this->file_exists($filePath)) {
+                $result = $this->createParentDirectories($filePath);
+                if ($result === false) {
+                    return false;
+                }
+            }
+
+            $source = fopen($tmpFile, 'r');
+            if ($source) {
+                $result = $this->file_put_contents($path, $source);
+                /**
+                 * $this->file_put_contents() might have already closed
+                 * the resource, so we check it, before trying to close it
+                 * to avoid messages in the error log.
+                 * @psalm-suppress RedundantCondition false-positive
+                 */
+                if (is_resource($source)) {
+                    fclose($source);
+                }
+                unlink($tmpFile);
+                return $result;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+
+    /**
+     * @param string $path
+     * @return mixed
+     * @throws InvalidPathException
+     */
+    public function getMimeType($path) {
+        $this->assertPathLength($path);
+        return $this->basicOperation('getMimeType', $path);
+    }
+
+    /**
+     * @param string $type
+     * @param string $path
+     * @param bool $raw
+     */
+    public function hash($type, $path, $raw = false): string|bool {
+        $postFix = (substr($path, -1) === '/') ? '/' : '';
+        $absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
+        if (Filesystem::isValidPath($path)) {
+            $path = $this->getRelativePath($absolutePath);
+            if ($path == null) {
+                return false;
+            }
+            if ($this->shouldEmitHooks($path)) {
+                \OC_Hook::emit(
+                    Filesystem::CLASSNAME,
+                    Filesystem::signal_read,
+                    [Filesystem::signal_param_path => $this->getHookPath($path)]
+                );
+            }
+            /** @var Storage|null $storage */
+            [$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
+            if ($storage) {
+                return $storage->hash($type, $internalPath, $raw);
+            }
+        }
+        return false;
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     * @throws InvalidPathException
+     */
+    public function free_space($path = '/') {
+        $this->assertPathLength($path);
+        $result = $this->basicOperation('free_space', $path);
+        if ($result === null) {
+            throw new InvalidPathException();
+        }
+        return $result;
+    }
+
+    /**
+     * abstraction layer for basic filesystem functions: wrapper for \OC\Files\Storage\Storage
+     *
+     * @param mixed $extraParam (optional)
+     * @return mixed
+     * @throws LockedException
+     *
+     * This method takes requests for basic filesystem functions (e.g. reading & writing
+     * files), processes hooks and proxies, sanitises paths, and finally passes them on to
+     * \OC\Files\Storage\Storage for delegation to a storage backend for execution
+     */
+    private function basicOperation(string $operation, string $path, array $hooks = [], $extraParam = null) {
+        $postFix = (substr($path, -1) === '/') ? '/' : '';
+        $absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
+        if (Filesystem::isValidPath($path)
+            && !Filesystem::isFileBlacklisted($path)
+        ) {
+            $path = $this->getRelativePath($absolutePath);
+            if ($path == null) {
+                return false;
+            }
+
+            if (in_array('write', $hooks) || in_array('delete', $hooks) || in_array('read', $hooks)) {
+                // always a shared lock during pre-hooks so the hook can read the file
+                $this->lockFile($path, ILockingProvider::LOCK_SHARED);
+            }
+
+            $run = $this->runHooks($hooks, $path);
+            [$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
+            if ($run && $storage) {
+                /** @var Storage $storage */
+                if (in_array('write', $hooks) || in_array('delete', $hooks)) {
+                    try {
+                        $this->changeLock($path, ILockingProvider::LOCK_EXCLUSIVE);
+                    } catch (LockedException $e) {
+                        // release the shared lock we acquired before quitting
+                        $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                        throw $e;
+                    }
+                }
+                try {
+                    if (!is_null($extraParam)) {
+                        $result = $storage->$operation($internalPath, $extraParam);
+                    } else {
+                        $result = $storage->$operation($internalPath);
+                    }
+                } catch (\Exception $e) {
+                    if (in_array('write', $hooks) || in_array('delete', $hooks)) {
+                        $this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
+                    } elseif (in_array('read', $hooks)) {
+                        $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                    }
+                    throw $e;
+                }
+
+                if ($result !== false && in_array('delete', $hooks)) {
+                    $this->removeUpdate($storage, $internalPath);
+                }
+                if ($result !== false && in_array('write', $hooks, true) && $operation !== 'fopen' && $operation !== 'touch') {
+                    $isCreateOperation = $operation === 'mkdir' || ($operation === 'file_put_contents' && in_array('create', $hooks, true));
+                    $sizeDifference = $operation === 'mkdir' ? 0 : $result;
+                    $this->writeUpdate($storage, $internalPath, null, $isCreateOperation ? $sizeDifference : null);
+                }
+                if ($result !== false && in_array('touch', $hooks)) {
+                    $this->writeUpdate($storage, $internalPath, $extraParam, 0);
+                }
+
+                if ((in_array('write', $hooks) || in_array('delete', $hooks)) && ($operation !== 'fopen' || $result === false)) {
+                    $this->changeLock($path, ILockingProvider::LOCK_SHARED);
+                }
+
+                $unlockLater = false;
+                if ($this->lockingEnabled && $operation === 'fopen' && is_resource($result)) {
+                    $unlockLater = true;
+                    // make sure our unlocking callback will still be called if connection is aborted
+                    ignore_user_abort(true);
+                    $result = CallbackWrapper::wrap($result, null, null, function () use ($hooks, $path) {
+                        if (in_array('write', $hooks)) {
+                            $this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
+                        } elseif (in_array('read', $hooks)) {
+                            $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                        }
+                    });
+                }
+
+                if ($this->shouldEmitHooks($path) && $result !== false) {
+                    if ($operation != 'fopen') { //no post hooks for fopen, the file stream is still open
+                        $this->runHooks($hooks, $path, true);
+                    }
+                }
+
+                if (!$unlockLater
+                    && (in_array('write', $hooks) || in_array('delete', $hooks) || in_array('read', $hooks))
+                ) {
+                    $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                }
+                return $result;
+            } else {
+                $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+            }
+        }
+        return null;
+    }
+
+    /**
+     * get the path relative to the default root for hook usage
+     *
+     * @param string $path
+     * @return ?string
+     */
+    private function getHookPath($path): ?string {
+        $view = Filesystem::getView();
+        if (!$view) {
+            return $path;
+        }
+        return $view->getRelativePath($this->getAbsolutePath($path));
+    }
+
+    private function shouldEmitHooks(string $path = ''): bool {
+        if ($path && Cache\Scanner::isPartialFile($path)) {
+            return false;
+        }
+        if (!Filesystem::$loaded) {
+            return false;
+        }
+        $defaultRoot = Filesystem::getRoot();
+        if ($defaultRoot === null) {
+            return false;
+        }
+        if ($this->fakeRoot === $defaultRoot) {
+            return true;
+        }
+        $fullPath = $this->getAbsolutePath($path);
+
+        if ($fullPath === $defaultRoot) {
+            return true;
+        }
+
+        return (strlen($fullPath) > strlen($defaultRoot)) && (substr($fullPath, 0, strlen($defaultRoot) + 1) === $defaultRoot . '/');
+    }
+
+    /**
+     * @param string[] $hooks
+     * @param string $path
+     * @param bool $post
+     * @return bool
+     */
+    private function runHooks($hooks, $path, $post = false) {
+        $relativePath = $path;
+        $path = $this->getHookPath($path);
+        $prefix = $post ? 'post_' : '';
+        $run = true;
+        if ($this->shouldEmitHooks($relativePath)) {
+            foreach ($hooks as $hook) {
+                if ($hook != 'read') {
+                    \OC_Hook::emit(
+                        Filesystem::CLASSNAME,
+                        $prefix . $hook,
+                        [
+                            Filesystem::signal_param_run => &$run,
+                            Filesystem::signal_param_path => $path
+                        ]
+                    );
+                } elseif (!$post) {
+                    \OC_Hook::emit(
+                        Filesystem::CLASSNAME,
+                        $prefix . $hook,
+                        [
+                            Filesystem::signal_param_path => $path
+                        ]
+                    );
+                }
+            }
+        }
+        return $run;
+    }
+
+    /**
+     * check if a file or folder has been updated since $time
+     *
+     * @param string $path
+     * @param int $time
+     * @return bool
+     */
+    public function hasUpdated($path, $time) {
+        return $this->basicOperation('hasUpdated', $path, [], $time);
+    }
+
+    /**
+     * @param string $ownerId
+     * @return IUser
+     */
+    private function getUserObjectForOwner(string $ownerId) {
+        return new LazyUser($ownerId, $this->userManager);
+    }
+
+    /**
+     * Get file info from cache
+     *
+     * If the file is not in cached it will be scanned
+     * If the file has changed on storage the cache will be updated
+     *
+     * @param Storage $storage
+     * @param string $internalPath
+     * @param string $relativePath
+     * @return ICacheEntry|bool
+     */
+    private function getCacheEntry($storage, $internalPath, $relativePath) {
+        $cache = $storage->getCache($internalPath);
+        $data = $cache->get($internalPath);
+        $watcher = $storage->getWatcher($internalPath);
+
+        try {
+            // if the file is not in the cache or needs to be updated, trigger the scanner and reload the data
+            if (!$data || (isset($data['size']) && $data['size'] === -1)) {
+                if (!$storage->file_exists($internalPath)) {
+                    return false;
+                }
+                // don't need to get a lock here since the scanner does it's own locking
+                $scanner = $storage->getScanner($internalPath);
+                $scanner->scan($internalPath, Cache\Scanner::SCAN_SHALLOW);
+                $data = $cache->get($internalPath);
+            } elseif (!Cache\Scanner::isPartialFile($internalPath) && $watcher->needsUpdate($internalPath, $data)) {
+                $this->lockFile($relativePath, ILockingProvider::LOCK_SHARED);
+                $watcher->update($internalPath, $data);
+                $storage->getPropagator()->propagateChange($internalPath, time());
+                $data = $cache->get($internalPath);
+                $this->unlockFile($relativePath, ILockingProvider::LOCK_SHARED);
+            }
+        } catch (LockedException $e) {
+            // if the file is locked we just use the old cache info
+        }
+
+        return $data;
+    }
+
+    /**
+     * get the filesystem info
+     *
+     * @param string $path
+     * @param bool|string $includeMountPoints true to add mountpoint sizes,
+     *                                        'ext' to add only ext storage mount point sizes. Defaults to true.
+     * @return \OC\Files\FileInfo|false False if file does not exist
+     */
+    public function getFileInfo($path, $includeMountPoints = true) {
+        $this->assertPathLength($path);
+        if (!Filesystem::isValidPath($path)) {
+            return false;
+        }
+        $relativePath = $path;
+        $path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
+
+        $mount = Filesystem::getMountManager()->find($path);
+        $storage = $mount->getStorage();
+        $internalPath = $mount->getInternalPath($path);
+        if ($storage) {
+            $data = $this->getCacheEntry($storage, $internalPath, $relativePath);
+
+            if (!$data instanceof ICacheEntry) {
+                if (Cache\Scanner::isPartialFile($relativePath)) {
+                    return $this->getPartFileInfo($relativePath);
+                }
+
+                return false;
+            }
+
+            if ($mount instanceof MoveableMount && $internalPath === '') {
+                $data['permissions'] |= \OCP\Constants::PERMISSION_DELETE;
+            }
+            if ($internalPath === '' && $data['name']) {
+                $data['name'] = basename($path);
+            }
+
+            $ownerId = $storage->getOwner($internalPath);
+            $owner = null;
+            if ($ownerId !== false) {
+                // ownerId might be null if files are accessed with an access token without file system access
+                $owner = $this->getUserObjectForOwner($ownerId);
+            }
+            $info = new FileInfo($path, $storage, $internalPath, $data, $mount, $owner);
+
+            if (isset($data['fileid'])) {
+                if ($includeMountPoints && $data['mimetype'] === 'httpd/unix-directory') {
+                    //add the sizes of other mount points to the folder
+                    $extOnly = ($includeMountPoints === 'ext');
+                    $this->addSubMounts($info, $extOnly);
+                }
+            }
+
+            return $info;
+        } else {
+            $this->logger->warning('Storage not valid for mountpoint: ' . $mount->getMountPoint(), ['app' => 'core']);
+        }
+
+        return false;
+    }
+
+    /**
+     * Extend a FileInfo that was previously requested with `$includeMountPoints = false` to include the sub mounts
+     */
+    public function addSubMounts(FileInfo $info, $extOnly = false): void {
+        $mounts = Filesystem::getMountManager()->findIn($info->getPath());
+        $info->setSubMounts(array_filter($mounts, function (IMountPoint $mount) use ($extOnly) {
+            return !($extOnly && $mount instanceof SharedMount);
+        }));
+    }
+
+    /**
+     * get the content of a directory
+     *
+     * @param string $directory path under datadirectory
+     * @param string $mimetype_filter limit returned content to this mimetype or mimepart
+     * @return FileInfo[]
+     */
+    public function getDirectoryContent($directory, $mimetype_filter = '', ?\OCP\Files\FileInfo $directoryInfo = null) {
+        $this->assertPathLength($directory);
+        if (!Filesystem::isValidPath($directory)) {
+            return [];
+        }
+
+        $path = $this->getAbsolutePath($directory);
+        $path = Filesystem::normalizePath($path);
+        $mount = $this->getMount($directory);
+        $storage = $mount->getStorage();
+        $internalPath = $mount->getInternalPath($path);
+        if (!$storage) {
+            return [];
+        }
+
+        $cache = $storage->getCache($internalPath);
+        $user = \OC_User::getUser();
+
+        if (!$directoryInfo) {
+            $data = $this->getCacheEntry($storage, $internalPath, $directory);
+            if (!$data instanceof ICacheEntry || !isset($data['fileid'])) {
+                return [];
+            }
+        } else {
+            $data = $directoryInfo;
+        }
+
+        if (!($data->getPermissions() & Constants::PERMISSION_READ)) {
+            return [];
+        }
+
+        $folderId = $data->getId();
+        $contents = $cache->getFolderContentsById($folderId); //TODO: mimetype_filter
+
+        $sharingDisabled = \OCP\Util::isSharingDisabledForUser();
+
+        $fileNames = array_map(function (ICacheEntry $content) {
+            return $content->getName();
+        }, $contents);
+        /**
+         * @var \OC\Files\FileInfo[] $fileInfos
+         */
+        $fileInfos = array_map(function (ICacheEntry $content) use ($path, $storage, $mount, $sharingDisabled) {
+            if ($sharingDisabled) {
+                $content['permissions'] = $content['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
+            }
+            $ownerId = $storage->getOwner($content['path']);
+            if ($ownerId !== false) {
+                $owner = $this->getUserObjectForOwner($ownerId);
+            } else {
+                $owner = null;
+            }
+            return new FileInfo($path . '/' . $content['name'], $storage, $content['path'], $content, $mount, $owner);
+        }, $contents);
+        $files = array_combine($fileNames, $fileInfos);
+
+        //add a folder for any mountpoint in this directory and add the sizes of other mountpoints to the folders
+        $mounts = Filesystem::getMountManager()->findIn($path);
+
+        // make sure nested mounts are sorted after their parent mounts
+        // otherwise doesn't propagate the etag across storage boundaries correctly
+        usort($mounts, function (IMountPoint $a, IMountPoint $b) {
+            return $a->getMountPoint() <=> $b->getMountPoint();
+        });
+
+        $dirLength = strlen($path);
+        foreach ($mounts as $mount) {
+            $mountPoint = $mount->getMountPoint();
+            $subStorage = $mount->getStorage();
+            if ($subStorage) {
+                $subCache = $subStorage->getCache('');
+
+                $rootEntry = $subCache->get('');
+                if (!$rootEntry) {
+                    $subScanner = $subStorage->getScanner();
+                    try {
+                        $subScanner->scanFile('');
+                    } catch (\OCP\Files\StorageNotAvailableException $e) {
+                        continue;
+                    } catch (\OCP\Files\StorageInvalidException $e) {
+                        continue;
+                    } catch (\Exception $e) {
+                        // sometimes when the storage is not available it can be any exception
+                        $this->logger->error('Exception while scanning storage "' . $subStorage->getId() . '"', [
+                            'exception' => $e,
+                            'app' => 'core',
+                        ]);
+                        continue;
+                    }
+                    $rootEntry = $subCache->get('');
+                }
+
+                if ($rootEntry && ($rootEntry->getPermissions() & Constants::PERMISSION_READ)) {
+                    $relativePath = trim(substr($mountPoint, $dirLength), '/');
+                    if ($pos = strpos($relativePath, '/')) {
+                        //mountpoint inside subfolder add size to the correct folder
+                        $entryName = substr($relativePath, 0, $pos);
+
+                        // Create parent folders if the mountpoint is inside a subfolder that doesn't exist yet
+                        if (!isset($files[$entryName])) {
+                            try {
+                                [$storage, ] = $this->resolvePath($path . '/' . $entryName);
+                                // make sure we can create the mountpoint folder, even if the user has a quota of 0
+                                if ($storage->instanceOfStorage(Quota::class)) {
+                                    $storage->enableQuota(false);
+                                }
+
+                                if ($this->mkdir($path . '/' . $entryName) !== false) {
+                                    $info = $this->getFileInfo($path . '/' . $entryName);
+                                    if ($info !== false) {
+                                        $files[$entryName] = $info;
+                                    }
+                                }
+
+                                if ($storage->instanceOfStorage(Quota::class)) {
+                                    $storage->enableQuota(true);
+                                }
+                            } catch (\Exception $e) {
+                                // Creating the parent folder might not be possible, for example due to a lack of permissions.
+                                $this->logger->debug('Failed to create non-existent parent', ['exception' => $e, 'path' => $path . '/' . $entryName]);
+                            }
+                        }
+
+                        if (isset($files[$entryName])) {
+                            $files[$entryName]->addSubEntry($rootEntry, $mountPoint);
+                        }
+                    } else { //mountpoint in this folder, add an entry for it
+                        $rootEntry['name'] = $relativePath;
+                        $rootEntry['type'] = $rootEntry['mimetype'] === 'httpd/unix-directory' ? 'dir' : 'file';
+                        $permissions = $rootEntry['permissions'];
+                        // do not allow renaming/deleting the mount point if they are not shared files/folders
+                        // for shared files/folders we use the permissions given by the owner
+                        if ($mount instanceof MoveableMount) {
+                            $rootEntry['permissions'] = $permissions | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE;
+                        } else {
+                            $rootEntry['permissions'] = $permissions & (\OCP\Constants::PERMISSION_ALL - (\OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE));
+                        }
+
+                        $rootEntry['path'] = substr(Filesystem::normalizePath($path . '/' . $rootEntry['name']), strlen($user) + 2); // full path without /$user/
+
+                        // if sharing was disabled for the user we remove the share permissions
+                        if ($sharingDisabled) {
+                            $rootEntry['permissions'] = $rootEntry['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
+                        }
+
+                        $ownerId = $subStorage->getOwner('');
+                        if ($ownerId !== false) {
+                            $owner = $this->getUserObjectForOwner($ownerId);
+                        } else {
+                            $owner = null;
+                        }
+                        $files[$rootEntry->getName()] = new FileInfo($path . '/' . $rootEntry['name'], $subStorage, '', $rootEntry, $mount, $owner);
+                    }
+                }
+            }
+        }
+
+        if ($mimetype_filter) {
+            $files = array_filter($files, function (FileInfo $file) use ($mimetype_filter) {
+                if (strpos($mimetype_filter, '/')) {
+                    return $file->getMimetype() === $mimetype_filter;
+                } else {
+                    return $file->getMimePart() === $mimetype_filter;
+                }
+            });
+        }
+
+        return array_values($files);
+    }
+
+    /**
+     * change file metadata
+     *
+     * @param string $path
+     * @param array|\OCP\Files\FileInfo $data
+     * @return int
+     *
+     * returns the fileid of the updated file
+     */
+    public function putFileInfo($path, $data) {
+        $this->assertPathLength($path);
+        if ($data instanceof FileInfo) {
+            $data = $data->getData();
+        }
+        $path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
+        /**
+         * @var Storage $storage
+         * @var string $internalPath
+         */
+        [$storage, $internalPath] = Filesystem::resolvePath($path);
+        if ($storage) {
+            $cache = $storage->getCache($path);
+
+            if (!$cache->inCache($internalPath)) {
+                $scanner = $storage->getScanner($internalPath);
+                $scanner->scan($internalPath, Cache\Scanner::SCAN_SHALLOW);
+            }
+
+            return $cache->put($internalPath, $data);
+        } else {
+            return -1;
+        }
+    }
+
+    /**
+     * search for files with the name matching $query
+     *
+     * @param string $query
+     * @return FileInfo[]
+     */
+    public function search($query) {
+        return $this->searchCommon('search', ['%' . $query . '%']);
+    }
+
+    /**
+     * search for files with the name matching $query
+     *
+     * @param string $query
+     * @return FileInfo[]
+     */
+    public function searchRaw($query) {
+        return $this->searchCommon('search', [$query]);
+    }
+
+    /**
+     * search for files by mimetype
+     *
+     * @param string $mimetype
+     * @return FileInfo[]
+     */
+    public function searchByMime($mimetype) {
+        return $this->searchCommon('searchByMime', [$mimetype]);
+    }
+
+    /**
+     * search for files by tag
+     *
+     * @param string|int $tag name or tag id
+     * @param string $userId owner of the tags
+     * @return FileInfo[]
+     */
+    public function searchByTag($tag, $userId) {
+        return $this->searchCommon('searchByTag', [$tag, $userId]);
+    }
+
+    /**
+     * @param string $method cache method
+     * @param array $args
+     * @return FileInfo[]
+     */
+    private function searchCommon($method, $args) {
+        $files = [];
+        $rootLength = strlen($this->fakeRoot);
+
+        $mount = $this->getMount('');
+        $mountPoint = $mount->getMountPoint();
+        $storage = $mount->getStorage();
+        $userManager = \OC::$server->getUserManager();
+        if ($storage) {
+            $cache = $storage->getCache('');
+
+            $results = call_user_func_array([$cache, $method], $args);
+            foreach ($results as $result) {
+                if (substr($mountPoint . $result['path'], 0, $rootLength + 1) === $this->fakeRoot . '/') {
+                    $internalPath = $result['path'];
+                    $path = $mountPoint . $result['path'];
+                    $result['path'] = substr($mountPoint . $result['path'], $rootLength);
+                    $ownerId = $storage->getOwner($internalPath);
+                    if ($ownerId !== false) {
+                        $owner = $userManager->get($ownerId);
+                    } else {
+                        $owner = null;
+                    }
+                    $files[] = new FileInfo($path, $storage, $internalPath, $result, $mount, $owner);
+                }
+            }
+
+            $mounts = Filesystem::getMountManager()->findIn($this->fakeRoot);
+            foreach ($mounts as $mount) {
+                $mountPoint = $mount->getMountPoint();
+                $storage = $mount->getStorage();
+                if ($storage) {
+                    $cache = $storage->getCache('');
+
+                    $relativeMountPoint = substr($mountPoint, $rootLength);
+                    $results = call_user_func_array([$cache, $method], $args);
+                    if ($results) {
+                        foreach ($results as $result) {
+                            $internalPath = $result['path'];
+                            $result['path'] = rtrim($relativeMountPoint . $result['path'], '/');
+                            $path = rtrim($mountPoint . $internalPath, '/');
+                            $ownerId = $storage->getOwner($internalPath);
+                            if ($ownerId !== false) {
+                                $owner = $userManager->get($ownerId);
+                            } else {
+                                $owner = null;
+                            }
+                            $files[] = new FileInfo($path, $storage, $internalPath, $result, $mount, $owner);
+                        }
+                    }
+                }
+            }
+        }
+        return $files;
+    }
+
+    /**
+     * Get the owner for a file or folder
+     *
+     * @throws NotFoundException
+     */
+    public function getOwner(string $path): string {
+        $info = $this->getFileInfo($path);
+        if (!$info) {
+            throw new NotFoundException($path . ' not found while trying to get owner');
+        }
+
+        if ($info->getOwner() === null) {
+            throw new NotFoundException($path . ' has no owner');
+        }
+
+        return $info->getOwner()->getUID();
+    }
+
+    /**
+     * get the ETag for a file or folder
+     *
+     * @param string $path
+     * @return string|false
+     */
+    public function getETag($path) {
+        [$storage, $internalPath] = $this->resolvePath($path);
+        if ($storage) {
+            return $storage->getETag($internalPath);
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Get the path of a file by id, relative to the view
+     *
+     * Note that the resulting path is not guaranteed to be unique for the id, multiple paths can point to the same file
+     *
+     * @param int $id
+     * @param int|null $storageId
+     * @return string
+     * @throws NotFoundException
+     */
+    public function getPath($id, ?int $storageId = null) {
+        $id = (int)$id;
+        $manager = Filesystem::getMountManager();
+        $mounts = $manager->findIn($this->fakeRoot);
+        $mounts[] = $manager->find($this->fakeRoot);
+        $mounts = array_filter($mounts);
+        // reverse the array, so we start with the storage this view is in
+        // which is the most likely to contain the file we're looking for
+        $mounts = array_reverse($mounts);
+
+        // put non-shared mounts in front of the shared mount
+        // this prevents unneeded recursion into shares
+        usort($mounts, function (IMountPoint $a, IMountPoint $b) {
+            return $a instanceof SharedMount && (!$b instanceof SharedMount) ? 1 : -1;
+        });
+
+        if (!is_null($storageId)) {
+            $mounts = array_filter($mounts, function (IMountPoint $mount) use ($storageId) {
+                return $mount->getNumericStorageId() === $storageId;
+            });
+        }
+
+        foreach ($mounts as $mount) {
+            /**
+             * @var \OC\Files\Mount\MountPoint $mount
+             */
+            if ($mount->getStorage()) {
+                $cache = $mount->getStorage()->getCache();
+                $internalPath = $cache->getPathById($id);
+                if (is_string($internalPath)) {
+                    $fullPath = $mount->getMountPoint() . $internalPath;
+                    if (!is_null($path = $this->getRelativePath($fullPath))) {
+                        return $path;
+                    }
+                }
+            }
+        }
+        throw new NotFoundException(sprintf('File with id "%s" has not been found.', $id));
+    }
+
+    /**
+     * @param string $path
+     * @throws InvalidPathException
+     */
+    private function assertPathLength($path): void {
+        $maxLen = min(PHP_MAXPATHLEN, 4000);
+        // Check for the string length - performed using isset() instead of strlen()
+        // because isset() is about 5x-40x faster.
+        if (isset($path[$maxLen])) {
+            $pathLen = strlen($path);
+            throw new InvalidPathException("Path length($pathLen) exceeds max path length($maxLen): $path");
+        }
+    }
+
+    /**
+     * check if it is allowed to move a mount point to a given target.
+     * It is not allowed to move a mount point into a different mount point or
+     * into an already shared folder
+     */
+    private function targetIsNotShared(string $user, string $targetPath): bool {
+        $providers = [
+            IShare::TYPE_USER,
+            IShare::TYPE_GROUP,
+            IShare::TYPE_EMAIL,
+            IShare::TYPE_CIRCLE,
+            IShare::TYPE_ROOM,
+            IShare::TYPE_DECK,
+            IShare::TYPE_SCIENCEMESH
+        ];
+        $shareManager = Server::get(IManager::class);
+        /** @var IShare[] $shares */
+        $shares = array_merge(...array_map(function (int $type) use ($shareManager, $user) {
+            return $shareManager->getSharesBy($user, $type);
+        }, $providers));
+
+        foreach ($shares as $share) {
+            $sharedPath = $share->getNode()->getPath();
+            if ($targetPath === $sharedPath || str_starts_with($targetPath, $sharedPath . '/')) {
+                $this->logger->debug(
+                    'It is not allowed to move one mount point into a shared folder',
+                    ['app' => 'files']);
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Get a fileinfo object for files that are ignored in the cache (part files)
+     */
+    private function getPartFileInfo(string $path): \OC\Files\FileInfo {
+        $mount = $this->getMount($path);
+        $storage = $mount->getStorage();
+        $internalPath = $mount->getInternalPath($this->getAbsolutePath($path));
+        $ownerId = $storage->getOwner($internalPath);
+        if ($ownerId !== false) {
+            $owner = Server::get(IUserManager::class)->get($ownerId);
+        } else {
+            $owner = null;
+        }
+        return new FileInfo(
+            $this->getAbsolutePath($path),
+            $storage,
+            $internalPath,
+            [
+                'fileid' => null,
+                'mimetype' => $storage->getMimeType($internalPath),
+                'name' => basename($path),
+                'etag' => null,
+                'size' => $storage->filesize($internalPath),
+                'mtime' => $storage->filemtime($internalPath),
+                'encrypted' => false,
+                'permissions' => \OCP\Constants::PERMISSION_ALL
+            ],
+            $mount,
+            $owner
+        );
+    }
+
+    /**
+     * @param string $path
+     * @param string $fileName
+     * @param bool $readonly Check only if the path is allowed for read-only access
+     * @throws InvalidPathException
+     */
+    public function verifyPath($path, $fileName, $readonly = false): void {
+        // All of the view's functions disallow '..' in the path so we can short cut if the path is invalid
+        if (!Filesystem::isValidPath($path ?: '/')) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($l->t('Path contains invalid segments'));
+        }
+
+        // Short cut for read-only validation
+        if ($readonly) {
+            $validator = Server::get(FilenameValidator::class);
+            if ($validator->isForbidden($fileName)) {
+                $l = \OCP\Util::getL10N('lib');
+                throw new InvalidPathException($l->t('Filename is a reserved word'));
+            }
+            return;
+        }
+
+        try {
+            /** @type \OCP\Files\Storage $storage */
+            [$storage, $internalPath] = $this->resolvePath($path);
+            $storage->verifyPath($internalPath, $fileName);
+        } catch (ReservedWordException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($ex->getMessage() ?: $l->t('Filename is a reserved word'));
+        } catch (InvalidCharacterInPathException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($ex->getMessage() ?: $l->t('Filename contains at least one invalid character'));
+        } catch (FileNameTooLongException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($l->t('Filename is too long'));
+        } catch (InvalidDirectoryException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($l->t('Dot files are not allowed'));
+        } catch (EmptyFileNameException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($l->t('Empty filename is not allowed'));
+        }
+    }
+
+    /**
+     * get all parent folders of $path
+     *
+     * @param string $path
+     * @return string[]
+     */
+    private function getParents($path) {
+        $path = trim($path, '/');
+        if (!$path) {
+            return [];
+        }
+
+        $parts = explode('/', $path);
+
+        // remove the single file
+        array_pop($parts);
+        $result = ['/'];
+        $resultPath = '';
+        foreach ($parts as $part) {
+            if ($part) {
+                $resultPath .= '/' . $part;
+                $result[] = $resultPath;
+            }
+        }
+        return $result;
+    }
+
+    /**
+     * Returns the mount point for which to lock
+     *
+     * @param string $absolutePath absolute path
+     * @param bool $useParentMount true to return parent mount instead of whatever
+     *                             is mounted directly on the given path, false otherwise
+     * @return IMountPoint mount point for which to apply locks
+     */
+    private function getMountForLock(string $absolutePath, bool $useParentMount = false): IMountPoint {
+        $mount = Filesystem::getMountManager()->find($absolutePath);
+
+        if ($useParentMount) {
+            // find out if something is mounted directly on the path
+            $internalPath = $mount->getInternalPath($absolutePath);
+            if ($internalPath === '') {
+                // resolve the parent mount instead
+                $mount = Filesystem::getMountManager()->find(dirname($absolutePath));
+            }
+        }
+
+        return $mount;
+    }
+
+    /**
+     * Lock the given path
+     *
+     * @param string $path the path of the file to lock, relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException if the path is already locked
+     */
+    private function lockPath($path, $type, $lockMountPoint = false) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $mount = $this->getMountForLock($absolutePath, $lockMountPoint);
+        try {
+            $storage = $mount->getStorage();
+            if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+                $storage->acquireLock(
+                    $mount->getInternalPath($absolutePath),
+                    $type,
+                    $this->lockingProvider
+                );
+            }
+        } catch (LockedException $e) {
+            // rethrow with the human-readable path
+            throw new LockedException(
+                $path,
+                $e,
+                $e->getExistingLock()
+            );
+        }
+
+        return true;
+    }
+
+    /**
+     * Change the lock type
+     *
+     * @param string $path the path of the file to lock, relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException if the path is already locked
+     */
+    public function changeLock($path, $type, $lockMountPoint = false) {
+        $path = Filesystem::normalizePath($path);
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $mount = $this->getMountForLock($absolutePath, $lockMountPoint);
+        try {
+            $storage = $mount->getStorage();
+            if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+                $storage->changeLock(
+                    $mount->getInternalPath($absolutePath),
+                    $type,
+                    $this->lockingProvider
+                );
+            }
+        } catch (LockedException $e) {
+            // rethrow with the a human-readable path
+            throw new LockedException(
+                $path,
+                $e,
+                $e->getExistingLock()
+            );
+        }
+
+        return true;
+    }
+
+    /**
+     * Unlock the given path
+     *
+     * @param string $path the path of the file to unlock, relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException
+     */
+    private function unlockPath($path, $type, $lockMountPoint = false) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $mount = $this->getMountForLock($absolutePath, $lockMountPoint);
+        $storage = $mount->getStorage();
+        if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+            $storage->releaseLock(
+                $mount->getInternalPath($absolutePath),
+                $type,
+                $this->lockingProvider
+            );
+        }
+
+        return true;
+    }
+
+    /**
+     * Lock a path and all its parents up to the root of the view
+     *
+     * @param string $path the path of the file to lock relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException
+     */
+    public function lockFile($path, $type, $lockMountPoint = false) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $this->lockPath($path, $type, $lockMountPoint);
+
+        $parents = $this->getParents($path);
+        foreach ($parents as $parent) {
+            $this->lockPath($parent, ILockingProvider::LOCK_SHARED);
+        }
+
+        return true;
+    }
+
+    /**
+     * Unlock a path and all its parents up to the root of the view
+     *
+     * @param string $path the path of the file to lock relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException
+     */
+    public function unlockFile($path, $type, $lockMountPoint = false) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $this->unlockPath($path, $type, $lockMountPoint);
+
+        $parents = $this->getParents($path);
+        foreach ($parents as $parent) {
+            $this->unlockPath($parent, ILockingProvider::LOCK_SHARED);
+        }
+
+        return true;
+    }
+
+    /**
+     * Only lock files in data/user/files/
+     *
+     * @param string $path Absolute path to the file/folder we try to (un)lock
+     * @return bool
+     */
+    protected function shouldLockFile($path) {
+        $path = Filesystem::normalizePath($path);
+
+        $pathSegments = explode('/', $path);
+        if (isset($pathSegments[2])) {
+            // E.g.: /username/files/path-to-file
+            return ($pathSegments[2] === 'files') && (count($pathSegments) > 3);
+        }
+
+        return !str_starts_with($path, '/appdata_');
+    }
+
+    /**
+     * Shortens the given absolute path to be relative to
+     * "$user/files".
+     *
+     * @param string $absolutePath absolute path which is under "files"
+     *
+     * @return string path relative to "files" with trimmed slashes or null
+     *                if the path was NOT relative to files
+     *
+     * @throws \InvalidArgumentException if the given path was not under "files"
+     * @since 8.1.0
+     */
+    public function getPathRelativeToFiles($absolutePath) {
+        $path = Filesystem::normalizePath($absolutePath);
+        $parts = explode('/', trim($path, '/'), 3);
+        // "$user", "files", "path/to/dir"
+        if (!isset($parts[1]) || $parts[1] !== 'files') {
+            $this->logger->error(
+                '$absolutePath must be relative to "files", value is "{absolutePath}"',
+                [
+                    'absolutePath' => $absolutePath,
+                ]
+            );
+            throw new \InvalidArgumentException('$absolutePath must be relative to "files"');
+        }
+        if (isset($parts[2])) {
+            return $parts[2];
+        }
+        return '';
+    }
+
+    /**
+     * @param string $filename
+     * @return array
+     * @throws \OC\User\NoUserException
+     * @throws NotFoundException
+     */
+    public function getUidAndFilename($filename) {
+        $info = $this->getFileInfo($filename);
+        if (!$info instanceof \OCP\Files\FileInfo) {
+            throw new NotFoundException($this->getAbsolutePath($filename) . ' not found');
+        }
+        $uid = $info->getOwner()->getUID();
+        if ($uid != \OC_User::getUser()) {
+            Filesystem::initMountPoints($uid);
+            $ownerView = new View('/' . $uid . '/files');
+            try {
+                $filename = $ownerView->getPath($info['fileid']);
+            } catch (NotFoundException $e) {
+                throw new NotFoundException('File with id ' . $info['fileid'] . ' not found for user ' . $uid);
+            }
+        }
+        return [$uid, $filename];
+    }
+
+    /**
+     * Creates parent non-existing folders
+     *
+     * @param string $filePath
+     * @return bool
+     */
+    private function createParentDirectories($filePath) {
+        $directoryParts = explode('/', $filePath);
+        $directoryParts = array_filter($directoryParts);
+        foreach ($directoryParts as $key => $part) {
+            $currentPathElements = array_slice($directoryParts, 0, $key);
+            $currentPath = '/' . implode('/', $currentPathElements);
+            if ($this->is_file($currentPath)) {
+                return false;
+            }
+            if (!$this->file_exists($currentPath)) {
+                $this->mkdir($currentPath);
+            }
+        }
+
+        return true;
+    }
 }

lib/private/legacy/OC_Helper.php

Indentation +384 added lines, -384 removed lines

@@ -32,391 +32,391 @@
  * }
  */
 class OC_Helper {
-	private static $templateManager;
-	private static ?ICacheFactory $cacheFactory = null;
-	private static ?bool $quotaIncludeExternalStorage = null;
-
-	/**
-	 * Recursive copying of folders
-	 * @param string $src source folder
-	 * @param string $dest target folder
-	 * @return void
-	 * @deprecated 32.0.0 - use \OCP\Files\Folder::copy
-	 */
-	public static function copyr($src, $dest) {
-		if (!file_exists($src)) {
-			return;
-		}
-
-		if (is_dir($src)) {
-			if (!is_dir($dest)) {
-				mkdir($dest);
-			}
-			$files = scandir($src);
-			foreach ($files as $file) {
-				if ($file != '.' && $file != '..') {
-					self::copyr("$src/$file", "$dest/$file");
-				}
-			}
-		} else {
-			$validator = \OCP\Server::get(FilenameValidator::class);
-			if (!$validator->isForbidden($src)) {
-				copy($src, $dest);
-			}
-		}
-	}
-
-	/**
-	 * @deprecated 18.0.0
-	 * @return \OC\Files\Type\TemplateManager
-	 */
-	public static function getFileTemplateManager() {
-		if (!self::$templateManager) {
-			self::$templateManager = new \OC\Files\Type\TemplateManager();
-		}
-		return self::$templateManager;
-	}
-
-	/**
-	 * detect if a given program is found in the search PATH
-	 *
-	 * @param string $name
-	 * @param bool $path
-	 * @internal param string $program name
-	 * @internal param string $optional search path, defaults to $PATH
-	 * @return bool true if executable program found in path
-	 * @deprecated 32.0.0 use the \OCP\IBinaryFinder
-	 */
-	public static function canExecute($name, $path = false) {
-		// path defaults to PATH from environment if not set
-		if ($path === false) {
-			$path = getenv('PATH');
-		}
-		// we look for an executable file of that name
-		$exts = [''];
-		$check_fn = 'is_executable';
-		// Default check will be done with $path directories :
-		$dirs = explode(PATH_SEPARATOR, (string)$path);
-		// WARNING : We have to check if open_basedir is enabled :
-		$obd = OC::$server->get(IniGetWrapper::class)->getString('open_basedir');
-		if ($obd != 'none') {
-			$obd_values = explode(PATH_SEPARATOR, $obd);
-			if (count($obd_values) > 0 and $obd_values[0]) {
-				// open_basedir is in effect !
-				// We need to check if the program is in one of these dirs :
-				$dirs = $obd_values;
-			}
-		}
-		foreach ($dirs as $dir) {
-			foreach ($exts as $ext) {
-				if ($check_fn("$dir/$name" . $ext)) {
-					return true;
-				}
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * copy the contents of one stream to another
-	 *
-	 * @param resource $source
-	 * @param resource $target
-	 * @return array the number of bytes copied and result
-	 * @deprecated 5.0.0 - Use \OCP\Files::streamCopy
-	 */
-	public static function streamCopy($source, $target) {
-		return \OCP\Files::streamCopy($source, $target, true);
-	}
-
-	/**
-	 * Adds a suffix to the name in case the file exists
-	 *
-	 * @param string $path
-	 * @param string $filename
-	 * @return string
-	 */
-	public static function buildNotExistingFileName($path, $filename) {
-		$view = \OC\Files\Filesystem::getView();
-		return self::buildNotExistingFileNameForView($path, $filename, $view);
-	}
-
-	/**
-	 * Adds a suffix to the name in case the file exists
-	 *
-	 * @param string $path
-	 * @param string $filename
-	 * @return string
-	 */
-	public static function buildNotExistingFileNameForView($path, $filename, \OC\Files\View $view) {
-		if ($path === '/') {
-			$path = '';
-		}
-		if ($pos = strrpos($filename, '.')) {
-			$name = substr($filename, 0, $pos);
-			$ext = substr($filename, $pos);
-		} else {
-			$name = $filename;
-			$ext = '';
-		}
-
-		$newpath = $path . '/' . $filename;
-		if ($view->file_exists($newpath)) {
-			if (preg_match_all('/\((\d+)\)/', $name, $matches, PREG_OFFSET_CAPTURE)) {
-				//Replace the last "(number)" with "(number+1)"
-				$last_match = count($matches[0]) - 1;
-				$counter = $matches[1][$last_match][0] + 1;
-				$offset = $matches[0][$last_match][1];
-				$match_length = strlen($matches[0][$last_match][0]);
-			} else {
-				$counter = 2;
-				$match_length = 0;
-				$offset = false;
-			}
-			do {
-				if ($offset) {
-					//Replace the last "(number)" with "(number+1)"
-					$newname = substr_replace($name, '(' . $counter . ')', $offset, $match_length);
-				} else {
-					$newname = $name . ' (' . $counter . ')';
-				}
-				$newpath = $path . '/' . $newname . $ext;
-				$counter++;
-			} while ($view->file_exists($newpath));
-		}
-
-		return $newpath;
-	}
-
-	/**
-	 * Checks if a function is available
-	 *
-	 * @deprecated 25.0.0 use \OCP\Util::isFunctionEnabled instead
-	 */
-	public static function is_function_enabled(string $function_name): bool {
-		return Util::isFunctionEnabled($function_name);
-	}
-
-	/**
-	 * Try to find a program
-	 * @deprecated 25.0.0 Use \OC\BinaryFinder directly
-	 */
-	public static function findBinaryPath(string $program): ?string {
-		$result = Server::get(IBinaryFinder::class)->findBinaryPath($program);
-		return $result !== false ? $result : null;
-	}
-
-	/**
-	 * Calculate the disc space for the given path
-	 *
-	 * BEWARE: this requires that Util::setupFS() was called
-	 * already !
-	 *
-	 * @param string $path
-	 * @param \OCP\Files\FileInfo $rootInfo (optional)
-	 * @param bool $includeMountPoints whether to include mount points in the size calculation
-	 * @param bool $useCache whether to use the cached quota values
-	 * @psalm-suppress LessSpecificReturnStatement Legacy code outputs weird types - manually validated that they are correct
-	 * @return StorageInfo
-	 * @throws \OCP\Files\NotFoundException
-	 */
-	public static function getStorageInfo($path, $rootInfo = null, $includeMountPoints = true, $useCache = true) {
-		if (!self::$cacheFactory) {
-			self::$cacheFactory = Server::get(ICacheFactory::class);
-		}
-		$memcache = self::$cacheFactory->createLocal('storage_info');
-
-		// return storage info without adding mount points
-		if (self::$quotaIncludeExternalStorage === null) {
-			self::$quotaIncludeExternalStorage = \OC::$server->getSystemConfig()->getValue('quota_include_external_storage', false);
-		}
-
-		$view = Filesystem::getView();
-		if (!$view) {
-			throw new \OCP\Files\NotFoundException();
-		}
-		$fullPath = Filesystem::normalizePath($view->getAbsolutePath($path));
-
-		$cacheKey = $fullPath . '::' . ($includeMountPoints ? 'include' : 'exclude');
-		if ($useCache) {
-			$cached = $memcache->get($cacheKey);
-			if ($cached) {
-				return $cached;
-			}
-		}
-
-		if (!$rootInfo) {
-			$rootInfo = \OC\Files\Filesystem::getFileInfo($path, self::$quotaIncludeExternalStorage ? 'ext' : false);
-		}
-		if (!$rootInfo instanceof \OCP\Files\FileInfo) {
-			throw new \OCP\Files\NotFoundException('The root directory of the user\'s files is missing');
-		}
-		$used = $rootInfo->getSize($includeMountPoints);
-		if ($used < 0) {
-			$used = 0.0;
-		}
-		/** @var int|float $quota */
-		$quota = \OCP\Files\FileInfo::SPACE_UNLIMITED;
-		$mount = $rootInfo->getMountPoint();
-		$storage = $mount->getStorage();
-		$sourceStorage = $storage;
-		if ($storage->instanceOfStorage('\OCA\Files_Sharing\SharedStorage')) {
-			self::$quotaIncludeExternalStorage = false;
-		}
-		if (self::$quotaIncludeExternalStorage) {
-			if ($storage->instanceOfStorage('\OC\Files\Storage\Home')
-				|| $storage->instanceOfStorage('\OC\Files\ObjectStore\HomeObjectStoreStorage')
-			) {
-				/** @var \OC\Files\Storage\Home $storage */
-				$user = $storage->getUser();
-			} else {
-				$user = \OC::$server->getUserSession()->getUser();
-			}
-			$quota = OC_Util::getUserQuota($user);
-			if ($quota !== \OCP\Files\FileInfo::SPACE_UNLIMITED) {
-				// always get free space / total space from root + mount points
-				return self::getGlobalStorageInfo($quota, $user, $mount);
-			}
-		}
-
-		// TODO: need a better way to get total space from storage
-		if ($sourceStorage->instanceOfStorage('\OC\Files\Storage\Wrapper\Quota')) {
-			/** @var \OC\Files\Storage\Wrapper\Quota $storage */
-			$quota = $sourceStorage->getQuota();
-		}
-		try {
-			$free = $sourceStorage->free_space($rootInfo->getInternalPath());
-			if (is_bool($free)) {
-				$free = 0.0;
-			}
-		} catch (\Exception $e) {
-			if ($path === '') {
-				throw $e;
-			}
-			/** @var LoggerInterface $logger */
-			$logger = \OC::$server->get(LoggerInterface::class);
-			$logger->warning('Error while getting quota info, using root quota', ['exception' => $e]);
-			$rootInfo = self::getStorageInfo('');
-			$memcache->set($cacheKey, $rootInfo, 5 * 60);
-			return $rootInfo;
-		}
-		if ($free >= 0) {
-			$total = $free + $used;
-		} else {
-			$total = $free; //either unknown or unlimited
-		}
-		if ($total > 0) {
-			if ($quota > 0 && $total > $quota) {
-				$total = $quota;
-			}
-			// prevent division by zero or error codes (negative values)
-			$relative = round(($used / $total) * 10000) / 100;
-		} else {
-			$relative = 0;
-		}
-
-		/*
+    private static $templateManager;
+    private static ?ICacheFactory $cacheFactory = null;
+    private static ?bool $quotaIncludeExternalStorage = null;
+
+    /**
+     * Recursive copying of folders
+     * @param string $src source folder
+     * @param string $dest target folder
+     * @return void
+     * @deprecated 32.0.0 - use \OCP\Files\Folder::copy
+     */
+    public static function copyr($src, $dest) {
+        if (!file_exists($src)) {
+            return;
+        }
+
+        if (is_dir($src)) {
+            if (!is_dir($dest)) {
+                mkdir($dest);
+            }
+            $files = scandir($src);
+            foreach ($files as $file) {
+                if ($file != '.' && $file != '..') {
+                    self::copyr("$src/$file", "$dest/$file");
+                }
+            }
+        } else {
+            $validator = \OCP\Server::get(FilenameValidator::class);
+            if (!$validator->isForbidden($src)) {
+                copy($src, $dest);
+            }
+        }
+    }
+
+    /**
+     * @deprecated 18.0.0
+     * @return \OC\Files\Type\TemplateManager
+     */
+    public static function getFileTemplateManager() {
+        if (!self::$templateManager) {
+            self::$templateManager = new \OC\Files\Type\TemplateManager();
+        }
+        return self::$templateManager;
+    }
+
+    /**
+     * detect if a given program is found in the search PATH
+     *
+     * @param string $name
+     * @param bool $path
+     * @internal param string $program name
+     * @internal param string $optional search path, defaults to $PATH
+     * @return bool true if executable program found in path
+     * @deprecated 32.0.0 use the \OCP\IBinaryFinder
+     */
+    public static function canExecute($name, $path = false) {
+        // path defaults to PATH from environment if not set
+        if ($path === false) {
+            $path = getenv('PATH');
+        }
+        // we look for an executable file of that name
+        $exts = [''];
+        $check_fn = 'is_executable';
+        // Default check will be done with $path directories :
+        $dirs = explode(PATH_SEPARATOR, (string)$path);
+        // WARNING : We have to check if open_basedir is enabled :
+        $obd = OC::$server->get(IniGetWrapper::class)->getString('open_basedir');
+        if ($obd != 'none') {
+            $obd_values = explode(PATH_SEPARATOR, $obd);
+            if (count($obd_values) > 0 and $obd_values[0]) {
+                // open_basedir is in effect !
+                // We need to check if the program is in one of these dirs :
+                $dirs = $obd_values;
+            }
+        }
+        foreach ($dirs as $dir) {
+            foreach ($exts as $ext) {
+                if ($check_fn("$dir/$name" . $ext)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * copy the contents of one stream to another
+     *
+     * @param resource $source
+     * @param resource $target
+     * @return array the number of bytes copied and result
+     * @deprecated 5.0.0 - Use \OCP\Files::streamCopy
+     */
+    public static function streamCopy($source, $target) {
+        return \OCP\Files::streamCopy($source, $target, true);
+    }
+
+    /**
+     * Adds a suffix to the name in case the file exists
+     *
+     * @param string $path
+     * @param string $filename
+     * @return string
+     */
+    public static function buildNotExistingFileName($path, $filename) {
+        $view = \OC\Files\Filesystem::getView();
+        return self::buildNotExistingFileNameForView($path, $filename, $view);
+    }
+
+    /**
+     * Adds a suffix to the name in case the file exists
+     *
+     * @param string $path
+     * @param string $filename
+     * @return string
+     */
+    public static function buildNotExistingFileNameForView($path, $filename, \OC\Files\View $view) {
+        if ($path === '/') {
+            $path = '';
+        }
+        if ($pos = strrpos($filename, '.')) {
+            $name = substr($filename, 0, $pos);
+            $ext = substr($filename, $pos);
+        } else {
+            $name = $filename;
+            $ext = '';
+        }
+
+        $newpath = $path . '/' . $filename;
+        if ($view->file_exists($newpath)) {
+            if (preg_match_all('/\((\d+)\)/', $name, $matches, PREG_OFFSET_CAPTURE)) {
+                //Replace the last "(number)" with "(number+1)"
+                $last_match = count($matches[0]) - 1;
+                $counter = $matches[1][$last_match][0] + 1;
+                $offset = $matches[0][$last_match][1];
+                $match_length = strlen($matches[0][$last_match][0]);
+            } else {
+                $counter = 2;
+                $match_length = 0;
+                $offset = false;
+            }
+            do {
+                if ($offset) {
+                    //Replace the last "(number)" with "(number+1)"
+                    $newname = substr_replace($name, '(' . $counter . ')', $offset, $match_length);
+                } else {
+                    $newname = $name . ' (' . $counter . ')';
+                }
+                $newpath = $path . '/' . $newname . $ext;
+                $counter++;
+            } while ($view->file_exists($newpath));
+        }
+
+        return $newpath;
+    }
+
+    /**
+     * Checks if a function is available
+     *
+     * @deprecated 25.0.0 use \OCP\Util::isFunctionEnabled instead
+     */
+    public static function is_function_enabled(string $function_name): bool {
+        return Util::isFunctionEnabled($function_name);
+    }
+
+    /**
+     * Try to find a program
+     * @deprecated 25.0.0 Use \OC\BinaryFinder directly
+     */
+    public static function findBinaryPath(string $program): ?string {
+        $result = Server::get(IBinaryFinder::class)->findBinaryPath($program);
+        return $result !== false ? $result : null;
+    }
+
+    /**
+     * Calculate the disc space for the given path
+     *
+     * BEWARE: this requires that Util::setupFS() was called
+     * already !
+     *
+     * @param string $path
+     * @param \OCP\Files\FileInfo $rootInfo (optional)
+     * @param bool $includeMountPoints whether to include mount points in the size calculation
+     * @param bool $useCache whether to use the cached quota values
+     * @psalm-suppress LessSpecificReturnStatement Legacy code outputs weird types - manually validated that they are correct
+     * @return StorageInfo
+     * @throws \OCP\Files\NotFoundException
+     */
+    public static function getStorageInfo($path, $rootInfo = null, $includeMountPoints = true, $useCache = true) {
+        if (!self::$cacheFactory) {
+            self::$cacheFactory = Server::get(ICacheFactory::class);
+        }
+        $memcache = self::$cacheFactory->createLocal('storage_info');
+
+        // return storage info without adding mount points
+        if (self::$quotaIncludeExternalStorage === null) {
+            self::$quotaIncludeExternalStorage = \OC::$server->getSystemConfig()->getValue('quota_include_external_storage', false);
+        }
+
+        $view = Filesystem::getView();
+        if (!$view) {
+            throw new \OCP\Files\NotFoundException();
+        }
+        $fullPath = Filesystem::normalizePath($view->getAbsolutePath($path));
+
+        $cacheKey = $fullPath . '::' . ($includeMountPoints ? 'include' : 'exclude');
+        if ($useCache) {
+            $cached = $memcache->get($cacheKey);
+            if ($cached) {
+                return $cached;
+            }
+        }
+
+        if (!$rootInfo) {
+            $rootInfo = \OC\Files\Filesystem::getFileInfo($path, self::$quotaIncludeExternalStorage ? 'ext' : false);
+        }
+        if (!$rootInfo instanceof \OCP\Files\FileInfo) {
+            throw new \OCP\Files\NotFoundException('The root directory of the user\'s files is missing');
+        }
+        $used = $rootInfo->getSize($includeMountPoints);
+        if ($used < 0) {
+            $used = 0.0;
+        }
+        /** @var int|float $quota */
+        $quota = \OCP\Files\FileInfo::SPACE_UNLIMITED;
+        $mount = $rootInfo->getMountPoint();
+        $storage = $mount->getStorage();
+        $sourceStorage = $storage;
+        if ($storage->instanceOfStorage('\OCA\Files_Sharing\SharedStorage')) {
+            self::$quotaIncludeExternalStorage = false;
+        }
+        if (self::$quotaIncludeExternalStorage) {
+            if ($storage->instanceOfStorage('\OC\Files\Storage\Home')
+                || $storage->instanceOfStorage('\OC\Files\ObjectStore\HomeObjectStoreStorage')
+            ) {
+                /** @var \OC\Files\Storage\Home $storage */
+                $user = $storage->getUser();
+            } else {
+                $user = \OC::$server->getUserSession()->getUser();
+            }
+            $quota = OC_Util::getUserQuota($user);
+            if ($quota !== \OCP\Files\FileInfo::SPACE_UNLIMITED) {
+                // always get free space / total space from root + mount points
+                return self::getGlobalStorageInfo($quota, $user, $mount);
+            }
+        }
+
+        // TODO: need a better way to get total space from storage
+        if ($sourceStorage->instanceOfStorage('\OC\Files\Storage\Wrapper\Quota')) {
+            /** @var \OC\Files\Storage\Wrapper\Quota $storage */
+            $quota = $sourceStorage->getQuota();
+        }
+        try {
+            $free = $sourceStorage->free_space($rootInfo->getInternalPath());
+            if (is_bool($free)) {
+                $free = 0.0;
+            }
+        } catch (\Exception $e) {
+            if ($path === '') {
+                throw $e;
+            }
+            /** @var LoggerInterface $logger */
+            $logger = \OC::$server->get(LoggerInterface::class);
+            $logger->warning('Error while getting quota info, using root quota', ['exception' => $e]);
+            $rootInfo = self::getStorageInfo('');
+            $memcache->set($cacheKey, $rootInfo, 5 * 60);
+            return $rootInfo;
+        }
+        if ($free >= 0) {
+            $total = $free + $used;
+        } else {
+            $total = $free; //either unknown or unlimited
+        }
+        if ($total > 0) {
+            if ($quota > 0 && $total > $quota) {
+                $total = $quota;
+            }
+            // prevent division by zero or error codes (negative values)
+            $relative = round(($used / $total) * 10000) / 100;
+        } else {
+            $relative = 0;
+        }
+
+        /*
 		 * \OCA\Files_Sharing\External\Storage returns the cloud ID as the owner for the storage.
 		 * It is unnecessary to query the user manager for the display name, as it won't have this information.
 		 */
-		$isRemoteShare = $storage->instanceOfStorage(\OCA\Files_Sharing\External\Storage::class);
-
-		$ownerId = $storage->getOwner($path);
-		$ownerDisplayName = '';
-
-		if ($isRemoteShare === false && $ownerId !== false) {
-			$ownerDisplayName = \OC::$server->getUserManager()->getDisplayName($ownerId) ?? '';
-		}
-
-		if (substr_count($mount->getMountPoint(), '/') < 3) {
-			$mountPoint = '';
-		} else {
-			[,,,$mountPoint] = explode('/', $mount->getMountPoint(), 4);
-		}
-
-		$info = [
-			'free' => $free,
-			'used' => $used,
-			'quota' => $quota,
-			'total' => $total,
-			'relative' => $relative,
-			'owner' => $ownerId,
-			'ownerDisplayName' => $ownerDisplayName,
-			'mountType' => $mount->getMountType(),
-			'mountPoint' => trim($mountPoint, '/'),
-		];
-
-		if ($isRemoteShare === false && $ownerId !== false && $path === '/') {
-			// If path is root, store this as last known quota usage for this user
-			\OCP\Server::get(\OCP\IConfig::class)->setUserValue($ownerId, 'files', 'lastSeenQuotaUsage', (string)$relative);
-		}
-
-		$memcache->set($cacheKey, $info, 5 * 60);
-
-		return $info;
-	}
-
-	/**
-	 * Get storage info including all mount points and quota
-	 *
-	 * @psalm-suppress LessSpecificReturnStatement Legacy code outputs weird types - manually validated that they are correct
-	 * @return StorageInfo
-	 */
-	private static function getGlobalStorageInfo(int|float $quota, IUser $user, IMountPoint $mount): array {
-		$rootInfo = \OC\Files\Filesystem::getFileInfo('', 'ext');
-		/** @var int|float $used */
-		$used = $rootInfo['size'];
-		if ($used < 0) {
-			$used = 0.0;
-		}
-
-		$total = $quota;
-		/** @var int|float $free */
-		$free = $quota - $used;
-
-		if ($total > 0) {
-			if ($quota > 0 && $total > $quota) {
-				$total = $quota;
-			}
-			// prevent division by zero or error codes (negative values)
-			$relative = round(($used / $total) * 10000) / 100;
-		} else {
-			$relative = 0.0;
-		}
-
-		if (substr_count($mount->getMountPoint(), '/') < 3) {
-			$mountPoint = '';
-		} else {
-			[,,,$mountPoint] = explode('/', $mount->getMountPoint(), 4);
-		}
-
-		return [
-			'free' => $free,
-			'used' => $used,
-			'total' => $total,
-			'relative' => $relative,
-			'quota' => $quota,
-			'owner' => $user->getUID(),
-			'ownerDisplayName' => $user->getDisplayName(),
-			'mountType' => $mount->getMountType(),
-			'mountPoint' => trim($mountPoint, '/'),
-		];
-	}
-
-	public static function clearStorageInfo(string $absolutePath): void {
-		/** @var ICacheFactory $cacheFactory */
-		$cacheFactory = \OC::$server->get(ICacheFactory::class);
-		$memcache = $cacheFactory->createLocal('storage_info');
-		$cacheKeyPrefix = Filesystem::normalizePath($absolutePath) . '::';
-		$memcache->remove($cacheKeyPrefix . 'include');
-		$memcache->remove($cacheKeyPrefix . 'exclude');
-	}
-
-	/**
-	 * Returns whether the config file is set manually to read-only
-	 * @return bool
-	 */
-	public static function isReadOnlyConfigEnabled() {
-		return \OC::$server->getConfig()->getSystemValueBool('config_is_read_only', false);
-	}
+        $isRemoteShare = $storage->instanceOfStorage(\OCA\Files_Sharing\External\Storage::class);
+
+        $ownerId = $storage->getOwner($path);
+        $ownerDisplayName = '';
+
+        if ($isRemoteShare === false && $ownerId !== false) {
+            $ownerDisplayName = \OC::$server->getUserManager()->getDisplayName($ownerId) ?? '';
+        }
+
+        if (substr_count($mount->getMountPoint(), '/') < 3) {
+            $mountPoint = '';
+        } else {
+            [,,,$mountPoint] = explode('/', $mount->getMountPoint(), 4);
+        }
+
+        $info = [
+            'free' => $free,
+            'used' => $used,
+            'quota' => $quota,
+            'total' => $total,
+            'relative' => $relative,
+            'owner' => $ownerId,
+            'ownerDisplayName' => $ownerDisplayName,
+            'mountType' => $mount->getMountType(),
+            'mountPoint' => trim($mountPoint, '/'),
+        ];
+
+        if ($isRemoteShare === false && $ownerId !== false && $path === '/') {
+            // If path is root, store this as last known quota usage for this user
+            \OCP\Server::get(\OCP\IConfig::class)->setUserValue($ownerId, 'files', 'lastSeenQuotaUsage', (string)$relative);
+        }
+
+        $memcache->set($cacheKey, $info, 5 * 60);
+
+        return $info;
+    }
+
+    /**
+     * Get storage info including all mount points and quota
+     *
+     * @psalm-suppress LessSpecificReturnStatement Legacy code outputs weird types - manually validated that they are correct
+     * @return StorageInfo
+     */
+    private static function getGlobalStorageInfo(int|float $quota, IUser $user, IMountPoint $mount): array {
+        $rootInfo = \OC\Files\Filesystem::getFileInfo('', 'ext');
+        /** @var int|float $used */
+        $used = $rootInfo['size'];
+        if ($used < 0) {
+            $used = 0.0;
+        }
+
+        $total = $quota;
+        /** @var int|float $free */
+        $free = $quota - $used;
+
+        if ($total > 0) {
+            if ($quota > 0 && $total > $quota) {
+                $total = $quota;
+            }
+            // prevent division by zero or error codes (negative values)
+            $relative = round(($used / $total) * 10000) / 100;
+        } else {
+            $relative = 0.0;
+        }
+
+        if (substr_count($mount->getMountPoint(), '/') < 3) {
+            $mountPoint = '';
+        } else {
+            [,,,$mountPoint] = explode('/', $mount->getMountPoint(), 4);
+        }
+
+        return [
+            'free' => $free,
+            'used' => $used,
+            'total' => $total,
+            'relative' => $relative,
+            'quota' => $quota,
+            'owner' => $user->getUID(),
+            'ownerDisplayName' => $user->getDisplayName(),
+            'mountType' => $mount->getMountType(),
+            'mountPoint' => trim($mountPoint, '/'),
+        ];
+    }
+
+    public static function clearStorageInfo(string $absolutePath): void {
+        /** @var ICacheFactory $cacheFactory */
+        $cacheFactory = \OC::$server->get(ICacheFactory::class);
+        $memcache = $cacheFactory->createLocal('storage_info');
+        $cacheKeyPrefix = Filesystem::normalizePath($absolutePath) . '::';
+        $memcache->remove($cacheKeyPrefix . 'include');
+        $memcache->remove($cacheKeyPrefix . 'exclude');
+    }
+
+    /**
+     * Returns whether the config file is set manually to read-only
+     * @return bool
+     */
+    public static function isReadOnlyConfigEnabled() {
+        return \OC::$server->getConfig()->getSystemValueBool('config_is_read_only', false);
+    }
 }

Spacing +12 added lines, -12 removed lines

@@ -96,7 +96,7 @@ 
 		$exts = [''];
 		$check_fn = 'is_executable';
 		// Default check will be done with $path directories :
-		$dirs = explode(PATH_SEPARATOR, (string)$path);
+		$dirs = explode(PATH_SEPARATOR, (string) $path);
 		// WARNING : We have to check if open_basedir is enabled :
 		$obd = OC::$server->get(IniGetWrapper::class)->getString('open_basedir');
 		if ($obd != 'none') {
@@ -109,7 +109,7 @@ 
 		}
 		foreach ($dirs as $dir) {
 			foreach ($exts as $ext) {
-				if ($check_fn("$dir/$name" . $ext)) {
+				if ($check_fn("$dir/$name".$ext)) {
 					return true;
 				}
 			}
@@ -160,7 +160,7 @@ 
 			$ext = '';
 		}
 
-		$newpath = $path . '/' . $filename;
+		$newpath = $path.'/'.$filename;
 		if ($view->file_exists($newpath)) {
 			if (preg_match_all('/\((\d+)\)/', $name, $matches, PREG_OFFSET_CAPTURE)) {
 				//Replace the last "(number)" with "(number+1)"
@@ -176,11 +176,11 @@ 
 			do {
 				if ($offset) {
 					//Replace the last "(number)" with "(number+1)"
-					$newname = substr_replace($name, '(' . $counter . ')', $offset, $match_length);
+					$newname = substr_replace($name, '('.$counter.')', $offset, $match_length);
 				} else {
-					$newname = $name . ' (' . $counter . ')';
+					$newname = $name.' ('.$counter.')';
 				}
-				$newpath = $path . '/' . $newname . $ext;
+				$newpath = $path.'/'.$newname.$ext;
 				$counter++;
 			} while ($view->file_exists($newpath));
 		}
@@ -237,7 +237,7 @@ 
 		}
 		$fullPath = Filesystem::normalizePath($view->getAbsolutePath($path));
 
-		$cacheKey = $fullPath . '::' . ($includeMountPoints ? 'include' : 'exclude');
+		$cacheKey = $fullPath.'::'.($includeMountPoints ? 'include' : 'exclude');
 		if ($useCache) {
 			$cached = $memcache->get($cacheKey);
 			if ($cached) {
@@ -348,7 +348,7 @@ 
 
 		if ($isRemoteShare === false && $ownerId !== false && $path === '/') {
 			// If path is root, store this as last known quota usage for this user
-			\OCP\Server::get(\OCP\IConfig::class)->setUserValue($ownerId, 'files', 'lastSeenQuotaUsage', (string)$relative);
+			\OCP\Server::get(\OCP\IConfig::class)->setUserValue($ownerId, 'files', 'lastSeenQuotaUsage', (string) $relative);
 		}
 
 		$memcache->set($cacheKey, $info, 5 * 60);
@@ -362,7 +362,7 @@ 
 	 * @psalm-suppress LessSpecificReturnStatement Legacy code outputs weird types - manually validated that they are correct
 	 * @return StorageInfo
 	 */
-	private static function getGlobalStorageInfo(int|float $quota, IUser $user, IMountPoint $mount): array {
+	private static function getGlobalStorageInfo(int | float $quota, IUser $user, IMountPoint $mount): array {
 		$rootInfo = \OC\Files\Filesystem::getFileInfo('', 'ext');
 		/** @var int|float $used */
 		$used = $rootInfo['size'];
@@ -407,9 +407,9 @@ 
 		/** @var ICacheFactory $cacheFactory */
 		$cacheFactory = \OC::$server->get(ICacheFactory::class);
 		$memcache = $cacheFactory->createLocal('storage_info');
-		$cacheKeyPrefix = Filesystem::normalizePath($absolutePath) . '::';
-		$memcache->remove($cacheKeyPrefix . 'include');
-		$memcache->remove($cacheKeyPrefix . 'exclude');
+		$cacheKeyPrefix = Filesystem::normalizePath($absolutePath).'::';
+		$memcache->remove($cacheKeyPrefix.'include');
+		$memcache->remove($cacheKeyPrefix.'exclude');
 	}
 
 	/**

apps/files_versions/lib/Storage.php

Indentation +951 added lines, -951 removed lines

@@ -45,955 +45,955 @@
 use Psr\Log\LoggerInterface;
 
 class Storage {
-	public const DEFAULTENABLED = true;
-	public const DEFAULTMAXSIZE = 50; // unit: percentage; 50% of available disk space/quota
-	public const VERSIONS_ROOT = 'files_versions/';
-
-	public const DELETE_TRIGGER_MASTER_REMOVED = 0;
-	public const DELETE_TRIGGER_RETENTION_CONSTRAINT = 1;
-	public const DELETE_TRIGGER_QUOTA_EXCEEDED = 2;
-
-	// files for which we can remove the versions after the delete operation was successful
-	private static $deletedFiles = [];
-
-	private static $sourcePathAndUser = [];
-
-	private static $max_versions_per_interval = [
-		//first 10sec, one version every 2sec
-		1 => ['intervalEndsAfter' => 10,      'step' => 2],
-		//next minute, one version every 10sec
-		2 => ['intervalEndsAfter' => 60,      'step' => 10],
-		//next hour, one version every minute
-		3 => ['intervalEndsAfter' => 3600,    'step' => 60],
-		//next 24h, one version every hour
-		4 => ['intervalEndsAfter' => 86400,   'step' => 3600],
-		//next 30days, one version per day
-		5 => ['intervalEndsAfter' => 2592000, 'step' => 86400],
-		//until the end one version per week
-		6 => ['intervalEndsAfter' => -1,      'step' => 604800],
-	];
-
-	/** @var Application */
-	private static $application;
-
-	/**
-	 * get the UID of the owner of the file and the path to the file relative to
-	 * owners files folder
-	 *
-	 * @param string $filename
-	 * @return array
-	 * @throws NoUserException
-	 */
-	public static function getUidAndFilename($filename) {
-		$uid = Filesystem::getOwner($filename);
-		$userManager = Server::get(IUserManager::class);
-		// if the user with the UID doesn't exists, e.g. because the UID points
-		// to a remote user with a federated cloud ID we use the current logged-in
-		// user. We need a valid local user to create the versions
-		if (!$userManager->userExists($uid)) {
-			$uid = OC_User::getUser();
-		}
-		Filesystem::initMountPoints($uid);
-		if ($uid !== OC_User::getUser()) {
-			$info = Filesystem::getFileInfo($filename);
-			$ownerView = new View('/' . $uid . '/files');
-			try {
-				$filename = $ownerView->getPath($info['fileid']);
-				// make sure that the file name doesn't end with a trailing slash
-				// can for example happen single files shared across servers
-				$filename = rtrim($filename, '/');
-			} catch (NotFoundException $e) {
-				$filename = null;
-			}
-		}
-		return [$uid, $filename];
-	}
-
-	/**
-	 * Remember the owner and the owner path of the source file
-	 *
-	 * @param string $source source path
-	 */
-	public static function setSourcePathAndUser($source) {
-		[$uid, $path] = self::getUidAndFilename($source);
-		self::$sourcePathAndUser[$source] = ['uid' => $uid, 'path' => $path];
-	}
-
-	/**
-	 * Gets the owner and the owner path from the source path
-	 *
-	 * @param string $source source path
-	 * @return array with user id and path
-	 */
-	public static function getSourcePathAndUser($source) {
-		if (isset(self::$sourcePathAndUser[$source])) {
-			$uid = self::$sourcePathAndUser[$source]['uid'];
-			$path = self::$sourcePathAndUser[$source]['path'];
-			unset(self::$sourcePathAndUser[$source]);
-		} else {
-			$uid = $path = false;
-		}
-		return [$uid, $path];
-	}
-
-	/**
-	 * get current size of all versions from a given user
-	 *
-	 * @param string $user user who owns the versions
-	 * @return int versions size
-	 */
-	private static function getVersionsSize($user) {
-		$view = new View('/' . $user);
-		$fileInfo = $view->getFileInfo('/files_versions');
-		return isset($fileInfo['size']) ? $fileInfo['size'] : 0;
-	}
-
-	/**
-	 * store a new version of a file.
-	 */
-	public static function store($filename) {
-		// if the file gets streamed we need to remove the .part extension
-		// to get the right target
-		$ext = pathinfo($filename, PATHINFO_EXTENSION);
-		if ($ext === 'part') {
-			$filename = substr($filename, 0, -5);
-		}
-
-		// we only handle existing files
-		if (! Filesystem::file_exists($filename) || Filesystem::is_dir($filename)) {
-			return false;
-		}
-
-		// since hook paths are always relative to the "default filesystem view"
-		// we always use the owner from there to get the full node
-		$uid = Filesystem::getView()->getOwner('');
-
-		/** @var IRootFolder $rootFolder */
-		$rootFolder = Server::get(IRootFolder::class);
-		$userFolder = $rootFolder->getUserFolder($uid);
-
-		$eventDispatcher = Server::get(IEventDispatcher::class);
-		try {
-			$file = $userFolder->get($filename);
-		} catch (NotFoundException $e) {
-			return false;
-		}
-
-		$mount = $file->getMountPoint();
-		if ($mount instanceof SharedMount) {
-			$ownerFolder = $rootFolder->getUserFolder($mount->getShare()->getShareOwner());
-			$ownerNode = $ownerFolder->getFirstNodeById($file->getId());
-			if ($ownerNode) {
-				$file = $ownerNode;
-				$uid = $mount->getShare()->getShareOwner();
-			}
-		}
-
-		/** @var IUserManager $userManager */
-		$userManager = Server::get(IUserManager::class);
-		$user = $userManager->get($uid);
-
-		if (!$user) {
-			return false;
-		}
-
-		// no use making versions for empty files
-		if ($file->getSize() === 0) {
-			return false;
-		}
-
-		$event = new CreateVersionEvent($file);
-		$eventDispatcher->dispatch('OCA\Files_Versions::createVersion', $event);
-		if ($event->shouldCreateVersion() === false) {
-			return false;
-		}
-
-		/** @var IVersionManager $versionManager */
-		$versionManager = Server::get(IVersionManager::class);
-
-		$versionManager->createVersion($user, $file);
-	}
-
-
-	/**
-	 * mark file as deleted so that we can remove the versions if the file is gone
-	 * @param string $path
-	 */
-	public static function markDeletedFile($path) {
-		[$uid, $filename] = self::getUidAndFilename($path);
-		self::$deletedFiles[$path] = [
-			'uid' => $uid,
-			'filename' => $filename];
-	}
-
-	/**
-	 * delete the version from the storage and cache
-	 *
-	 * @param View $view
-	 * @param string $path
-	 */
-	protected static function deleteVersion($view, $path) {
-		$view->unlink($path);
-		/**
-		 * @var \OC\Files\Storage\Storage $storage
-		 * @var string $internalPath
-		 */
-		[$storage, $internalPath] = $view->resolvePath($path);
-		$cache = $storage->getCache($internalPath);
-		$cache->remove($internalPath);
-	}
-
-	/**
-	 * Delete versions of a file
-	 */
-	public static function delete($path) {
-		$deletedFile = self::$deletedFiles[$path];
-		$uid = $deletedFile['uid'];
-		$filename = $deletedFile['filename'];
-
-		if (!Filesystem::file_exists($path)) {
-			$view = new View('/' . $uid . '/files_versions');
-
-			$versions = self::getVersions($uid, $filename);
-			if (!empty($versions)) {
-				foreach ($versions as $v) {
-					\OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $path . $v['version'], 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED]);
-					self::deleteVersion($view, $filename . '.v' . $v['version']);
-					\OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $path . $v['version'], 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED]);
-				}
-			}
-		}
-		unset(self::$deletedFiles[$path]);
-	}
-
-	/**
-	 * Delete a version of a file
-	 */
-	public static function deleteRevision(string $path, int $revision): void {
-		[$uid, $filename] = self::getUidAndFilename($path);
-		$view = new View('/' . $uid . '/files_versions');
-		\OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $path . $revision, 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED]);
-		self::deleteVersion($view, $filename . '.v' . $revision);
-		\OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $path . $revision, 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED]);
-	}
-
-	/**
-	 * Rename or copy versions of a file of the given paths
-	 *
-	 * @param string $sourcePath source path of the file to move, relative to
-	 *                           the currently logged in user's "files" folder
-	 * @param string $targetPath target path of the file to move, relative to
-	 *                           the currently logged in user's "files" folder
-	 * @param string $operation can be 'copy' or 'rename'
-	 */
-	public static function renameOrCopy($sourcePath, $targetPath, $operation) {
-		[$sourceOwner, $sourcePath] = self::getSourcePathAndUser($sourcePath);
-
-		// it was a upload of a existing file if no old path exists
-		// in this case the pre-hook already called the store method and we can
-		// stop here
-		if ($sourcePath === false) {
-			return true;
-		}
-
-		[$targetOwner, $targetPath] = self::getUidAndFilename($targetPath);
-
-		$sourcePath = ltrim($sourcePath, '/');
-		$targetPath = ltrim($targetPath, '/');
-
-		$rootView = new View('');
-
-		// did we move a directory ?
-		if ($rootView->is_dir('/' . $targetOwner . '/files/' . $targetPath)) {
-			// does the directory exists for versions too ?
-			if ($rootView->is_dir('/' . $sourceOwner . '/files_versions/' . $sourcePath)) {
-				// create missing dirs if necessary
-				self::createMissingDirectories($targetPath, new View('/' . $targetOwner));
-
-				// move the directory containing the versions
-				$rootView->$operation(
-					'/' . $sourceOwner . '/files_versions/' . $sourcePath,
-					'/' . $targetOwner . '/files_versions/' . $targetPath
-				);
-			}
-		} elseif ($versions = Storage::getVersions($sourceOwner, '/' . $sourcePath)) {
-			// create missing dirs if necessary
-			self::createMissingDirectories($targetPath, new View('/' . $targetOwner));
-
-			foreach ($versions as $v) {
-				// move each version one by one to the target directory
-				$rootView->$operation(
-					'/' . $sourceOwner . '/files_versions/' . $sourcePath . '.v' . $v['version'],
-					'/' . $targetOwner . '/files_versions/' . $targetPath . '.v' . $v['version']
-				);
-			}
-		}
-
-		// if we moved versions directly for a file, schedule expiration check for that file
-		if (!$rootView->is_dir('/' . $targetOwner . '/files/' . $targetPath)) {
-			self::scheduleExpire($targetOwner, $targetPath);
-		}
-	}
-
-	/**
-	 * Rollback to an old version of a file.
-	 *
-	 * @param string $file file name
-	 * @param int $revision revision timestamp
-	 * @return bool
-	 */
-	public static function rollback(string $file, int $revision, IUser $user) {
-		// add expected leading slash
-		$filename = '/' . ltrim($file, '/');
-
-		// Fetch the userfolder to trigger view hooks
-		$root = Server::get(IRootFolder::class);
-		$userFolder = $root->getUserFolder($user->getUID());
-
-		$users_view = new View('/' . $user->getUID());
-		$files_view = new View('/' . $user->getUID() . '/files');
-
-		$versionCreated = false;
-
-		$fileInfo = $files_view->getFileInfo($file);
-
-		// check if user has the permissions to revert a version
-		if (!$fileInfo->isUpdateable()) {
-			return false;
-		}
-
-		//first create a new version
-		$version = 'files_versions' . $filename . '.v' . $users_view->filemtime('files' . $filename);
-		if (!$users_view->file_exists($version)) {
-			$users_view->copy('files' . $filename, 'files_versions' . $filename . '.v' . $users_view->filemtime('files' . $filename));
-			$versionCreated = true;
-		}
-
-		$fileToRestore = 'files_versions' . $filename . '.v' . $revision;
-
-		// Restore encrypted version of the old file for the newly restored file
-		// This has to happen manually here since the file is manually copied below
-		$oldVersion = $users_view->getFileInfo($fileToRestore)->getEncryptedVersion();
-		$oldFileInfo = $users_view->getFileInfo($fileToRestore);
-		$cache = $fileInfo->getStorage()->getCache();
-		$cache->update(
-			$fileInfo->getId(), [
-				'encrypted' => $oldVersion,
-				'encryptedVersion' => $oldVersion,
-				'size' => $oldFileInfo->getData()['size'],
-				'unencrypted_size' => $oldFileInfo->getData()['unencrypted_size'],
-			]
-		);
-
-		// rollback
-		if (self::copyFileContents($users_view, $fileToRestore, 'files' . $filename)) {
-			$files_view->touch($file, $revision);
-			Storage::scheduleExpire($user->getUID(), $file);
-
-			return true;
-		} elseif ($versionCreated) {
-			self::deleteVersion($users_view, $version);
-		}
-
-		return false;
-	}
-
-	/**
-	 * Stream copy file contents from $path1 to $path2
-	 *
-	 * @param View $view view to use for copying
-	 * @param string $path1 source file to copy
-	 * @param string $path2 target file
-	 *
-	 * @return bool true for success, false otherwise
-	 */
-	private static function copyFileContents($view, $path1, $path2) {
-		/** @var \OC\Files\Storage\Storage $storage1 */
-		[$storage1, $internalPath1] = $view->resolvePath($path1);
-		/** @var \OC\Files\Storage\Storage $storage2 */
-		[$storage2, $internalPath2] = $view->resolvePath($path2);
-
-		$view->lockFile($path1, ILockingProvider::LOCK_EXCLUSIVE);
-		$view->lockFile($path2, ILockingProvider::LOCK_EXCLUSIVE);
-
-		try {
-			// TODO add a proper way of overwriting a file while maintaining file ids
-			if ($storage1->instanceOfStorage(\OC\Files\ObjectStore\ObjectStoreStorage::class)
-				|| $storage2->instanceOfStorage(\OC\Files\ObjectStore\ObjectStoreStorage::class)
-			) {
-				$source = $storage1->fopen($internalPath1, 'r');
-				$result = $source !== false;
-				if ($result) {
-					if ($storage2->instanceOfStorage(IWriteStreamStorage::class)) {
-						/** @var IWriteStreamStorage $storage2 */
-						$storage2->writeStream($internalPath2, $source);
-					} else {
-						$target = $storage2->fopen($internalPath2, 'w');
-						$result = $target !== false;
-						if ($target !== false) {
-							[, $result] = Files::streamCopy($source, $target, true);
-							fclose($target);
-						}
-					}
-					fclose($source);
-				}
-
-				if ($result !== false) {
-					$storage1->unlink($internalPath1);
-				}
-			} else {
-				$result = $storage2->moveFromStorage($storage1, $internalPath1, $internalPath2);
-			}
-		} finally {
-			$view->unlockFile($path1, ILockingProvider::LOCK_EXCLUSIVE);
-			$view->unlockFile($path2, ILockingProvider::LOCK_EXCLUSIVE);
-		}
-
-		return ($result !== false);
-	}
-
-	/**
-	 * get a list of all available versions of a file in descending chronological order
-	 * @param string $uid user id from the owner of the file
-	 * @param string $filename file to find versions of, relative to the user files dir
-	 * @param string $userFullPath
-	 * @return array versions newest version first
-	 */
-	public static function getVersions($uid, $filename, $userFullPath = '') {
-		$versions = [];
-		if (empty($filename)) {
-			return $versions;
-		}
-		// fetch for old versions
-		$view = new View('/' . $uid . '/');
-
-		$pathinfo = pathinfo($filename);
-		$versionedFile = $pathinfo['basename'];
-
-		$dir = Filesystem::normalizePath(self::VERSIONS_ROOT . '/' . $pathinfo['dirname']);
-
-		$dirContent = false;
-		if ($view->is_dir($dir)) {
-			$dirContent = $view->opendir($dir);
-		}
-
-		if ($dirContent === false) {
-			return $versions;
-		}
-
-		if (is_resource($dirContent)) {
-			while (($entryName = readdir($dirContent)) !== false) {
-				if (!Filesystem::isIgnoredDir($entryName)) {
-					$pathparts = pathinfo($entryName);
-					$filename = $pathparts['filename'];
-					if ($filename === $versionedFile) {
-						$pathparts = pathinfo($entryName);
-						$timestamp = substr($pathparts['extension'] ?? '', 1);
-						if (!is_numeric($timestamp)) {
-							Server::get(LoggerInterface::class)->error(
-								'Version file {path} has incorrect name format',
-								[
-									'path' => $entryName,
-									'app' => 'files_versions',
-								]
-							);
-							continue;
-						}
-						$filename = $pathparts['filename'];
-						$key = $timestamp . '#' . $filename;
-						$versions[$key]['version'] = $timestamp;
-						$versions[$key]['humanReadableTimestamp'] = self::getHumanReadableTimestamp((int)$timestamp);
-						if (empty($userFullPath)) {
-							$versions[$key]['preview'] = '';
-						} else {
-							/** @var IURLGenerator $urlGenerator */
-							$urlGenerator = Server::get(IURLGenerator::class);
-							$versions[$key]['preview'] = $urlGenerator->linkToRoute('files_version.Preview.getPreview',
-								['file' => $userFullPath, 'version' => $timestamp]);
-						}
-						$versions[$key]['path'] = Filesystem::normalizePath($pathinfo['dirname'] . '/' . $filename);
-						$versions[$key]['name'] = $versionedFile;
-						$versions[$key]['size'] = $view->filesize($dir . '/' . $entryName);
-						$versions[$key]['mimetype'] = Server::get(IMimeTypeDetector::class)->detectPath($versionedFile);
-					}
-				}
-			}
-			closedir($dirContent);
-		}
-
-		// sort with newest version first
-		krsort($versions);
-
-		return $versions;
-	}
-
-	/**
-	 * Expire versions that older than max version retention time
-	 *
-	 * @param string $uid
-	 */
-	public static function expireOlderThanMaxForUser($uid) {
-		/** @var IRootFolder $root */
-		$root = Server::get(IRootFolder::class);
-		try {
-			/** @var Folder $versionsRoot */
-			$versionsRoot = $root->get('/' . $uid . '/files_versions');
-		} catch (NotFoundException $e) {
-			return;
-		}
-
-		$expiration = self::getExpiration();
-		$threshold = $expiration->getMaxAgeAsTimestamp();
-		if (!$threshold) {
-			return;
-		}
-
-		$allVersions = $versionsRoot->search(new SearchQuery(
-			new SearchBinaryOperator(ISearchBinaryOperator::OPERATOR_NOT, [
-				new SearchComparison(ISearchComparison::COMPARE_EQUAL, 'mimetype', FileInfo::MIMETYPE_FOLDER),
-			]),
-			0,
-			0,
-			[]
-		));
-
-		/** @var VersionsMapper $versionsMapper */
-		$versionsMapper = Server::get(VersionsMapper::class);
-		$userFolder = $root->getUserFolder($uid);
-		$versionEntities = [];
-
-		/** @var Node[] $versions */
-		$versions = array_filter($allVersions, function (Node $info) use ($threshold, $userFolder, $versionsMapper, $versionsRoot, &$versionEntities) {
-			// Check that the file match '*.v*'
-			$versionsBegin = strrpos($info->getName(), '.v');
-			if ($versionsBegin === false) {
-				return false;
-			}
-
-			$version = (int)substr($info->getName(), $versionsBegin + 2);
-
-			// Check that the version does not have a label.
-			$path = $versionsRoot->getRelativePath($info->getPath());
-			if ($path === null) {
-				throw new DoesNotExistException('Could not find relative path of (' . $info->getPath() . ')');
-			}
-
-			try {
-				$node = $userFolder->get(substr($path, 0, -strlen('.v' . $version)));
-				$versionEntity = $versionsMapper->findVersionForFileId($node->getId(), $version);
-				$versionEntities[$info->getId()] = $versionEntity;
-
-				if ($versionEntity->getMetadataValue('label') !== null && $versionEntity->getMetadataValue('label') !== '') {
-					return false;
-				}
-			} catch (NotFoundException $e) {
-				// Original node not found, delete the version
-				return true;
-			} catch (StorageNotAvailableException|StorageInvalidException $e) {
-				// Storage can't be used, but it might only be temporary so we can't always delete the version
-				// since we can't determine if the version is named we take the safe route and don't expire
-				return false;
-			} catch (DoesNotExistException $ex) {
-				// Version on FS can have no equivalent in the DB if they were created before the version naming feature.
-				// So we ignore DoesNotExistException.
-			}
-
-			// Check that the version's timestamp is lower than $threshold
-			return $version < $threshold;
-		});
-
-		foreach ($versions as $version) {
-			$internalPath = $version->getInternalPath();
-			\OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $internalPath, 'trigger' => self::DELETE_TRIGGER_RETENTION_CONSTRAINT]);
-
-			$versionEntity = isset($versionEntities[$version->getId()]) ? $versionEntities[$version->getId()] : null;
-			if (!is_null($versionEntity)) {
-				$versionsMapper->delete($versionEntity);
-			}
-
-			try {
-				$version->delete();
-				\OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $internalPath, 'trigger' => self::DELETE_TRIGGER_RETENTION_CONSTRAINT]);
-			} catch (NotPermittedException $e) {
-				Server::get(LoggerInterface::class)->error("Missing permissions to delete version: {$internalPath}", ['app' => 'files_versions', 'exception' => $e]);
-			}
-		}
-	}
-
-	/**
-	 * translate a timestamp into a string like "5 days ago"
-	 *
-	 * @param int $timestamp
-	 * @return string for example "5 days ago"
-	 */
-	private static function getHumanReadableTimestamp(int $timestamp): string {
-		$diff = time() - $timestamp;
-
-		if ($diff < 60) { // first minute
-			return  $diff . ' seconds ago';
-		} elseif ($diff < 3600) { //first hour
-			return round($diff / 60) . ' minutes ago';
-		} elseif ($diff < 86400) { // first day
-			return round($diff / 3600) . ' hours ago';
-		} elseif ($diff < 604800) { //first week
-			return round($diff / 86400) . ' days ago';
-		} elseif ($diff < 2419200) { //first month
-			return round($diff / 604800) . ' weeks ago';
-		} elseif ($diff < 29030400) { // first year
-			return round($diff / 2419200) . ' months ago';
-		} else {
-			return round($diff / 29030400) . ' years ago';
-		}
-	}
-
-	/**
-	 * returns all stored file versions from a given user
-	 * @param string $uid id of the user
-	 * @return array with contains two arrays 'all' which contains all versions sorted by age and 'by_file' which contains all versions sorted by filename
-	 */
-	private static function getAllVersions($uid) {
-		$view = new View('/' . $uid . '/');
-		$dirs = [self::VERSIONS_ROOT];
-		$versions = [];
-
-		while (!empty($dirs)) {
-			$dir = array_pop($dirs);
-			$files = $view->getDirectoryContent($dir);
-
-			foreach ($files as $file) {
-				$fileData = $file->getData();
-				$filePath = $dir . '/' . $fileData['name'];
-				if ($file['type'] === 'dir') {
-					$dirs[] = $filePath;
-				} else {
-					$versionsBegin = strrpos($filePath, '.v');
-					$relPathStart = strlen(self::VERSIONS_ROOT);
-					$version = substr($filePath, $versionsBegin + 2);
-					$relpath = substr($filePath, $relPathStart, $versionsBegin - $relPathStart);
-					$key = $version . '#' . $relpath;
-					$versions[$key] = ['path' => $relpath, 'timestamp' => $version];
-				}
-			}
-		}
-
-		// newest version first
-		krsort($versions);
-
-		$result = [
-			'all' => [],
-			'by_file' => [],
-		];
-
-		foreach ($versions as $key => $value) {
-			$size = $view->filesize(self::VERSIONS_ROOT . '/' . $value['path'] . '.v' . $value['timestamp']);
-			$filename = $value['path'];
-
-			$result['all'][$key]['version'] = $value['timestamp'];
-			$result['all'][$key]['path'] = $filename;
-			$result['all'][$key]['size'] = $size;
-
-			$result['by_file'][$filename][$key]['version'] = $value['timestamp'];
-			$result['by_file'][$filename][$key]['path'] = $filename;
-			$result['by_file'][$filename][$key]['size'] = $size;
-		}
-
-		return $result;
-	}
-
-	/**
-	 * get list of files we want to expire
-	 * @param array $versions list of versions
-	 * @param integer $time
-	 * @param bool $quotaExceeded is versions storage limit reached
-	 * @return array containing the list of to deleted versions and the size of them
-	 */
-	protected static function getExpireList($time, $versions, $quotaExceeded = false) {
-		$expiration = self::getExpiration();
-
-		if ($expiration->shouldAutoExpire()) {
-			// Exclude versions that are newer than the minimum age from the auto expiration logic.
-			$minAge = $expiration->getMinAgeAsTimestamp();
-			if ($minAge !== false) {
-				$versionsToAutoExpire = array_filter($versions, fn ($version) => $version['version'] < $minAge);
-			} else {
-				$versionsToAutoExpire = $versions;
-			}
-
-			[$toDelete, $size] = self::getAutoExpireList($time, $versionsToAutoExpire);
-		} else {
-			$size = 0;
-			$toDelete = [];  // versions we want to delete
-		}
-
-		foreach ($versions as $key => $version) {
-			if (!is_numeric($version['version'])) {
-				Server::get(LoggerInterface::class)->error(
-					'Found a non-numeric timestamp version: ' . json_encode($version),
-					['app' => 'files_versions']);
-				continue;
-			}
-			if ($expiration->isExpired((int)($version['version']), $quotaExceeded) && !isset($toDelete[$key])) {
-				$size += $version['size'];
-				$toDelete[$key] = $version['path'] . '.v' . $version['version'];
-			}
-		}
-
-		return [$toDelete, $size];
-	}
-
-	/**
-	 * get list of files we want to expire
-	 * @param array $versions list of versions
-	 * @param integer $time
-	 * @return array containing the list of to deleted versions and the size of them
-	 */
-	protected static function getAutoExpireList($time, $versions) {
-		$size = 0;
-		$toDelete = [];  // versions we want to delete
-
-		$interval = 1;
-		$step = Storage::$max_versions_per_interval[$interval]['step'];
-		if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] === -1) {
-			$nextInterval = -1;
-		} else {
-			$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
-		}
-
-		$firstVersion = reset($versions);
-
-		if ($firstVersion === false) {
-			return [$toDelete, $size];
-		}
-
-		$firstKey = key($versions);
-		$prevTimestamp = $firstVersion['version'];
-		$nextVersion = $firstVersion['version'] - $step;
-		unset($versions[$firstKey]);
-
-		foreach ($versions as $key => $version) {
-			$newInterval = true;
-			while ($newInterval) {
-				if ($nextInterval === -1 || $prevTimestamp > $nextInterval) {
-					if ($version['version'] > $nextVersion) {
-						//distance between two version too small, mark to delete
-						$toDelete[$key] = $version['path'] . '.v' . $version['version'];
-						$size += $version['size'];
-						Server::get(LoggerInterface::class)->info('Mark to expire ' . $version['path'] . ' next version should be ' . $nextVersion . ' or smaller. (prevTimestamp: ' . $prevTimestamp . '; step: ' . $step, ['app' => 'files_versions']);
-					} else {
-						$nextVersion = $version['version'] - $step;
-						$prevTimestamp = $version['version'];
-					}
-					$newInterval = false; // version checked so we can move to the next one
-				} else { // time to move on to the next interval
-					$interval++;
-					$step = Storage::$max_versions_per_interval[$interval]['step'];
-					$nextVersion = $prevTimestamp - $step;
-					if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] === -1) {
-						$nextInterval = -1;
-					} else {
-						$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
-					}
-					$newInterval = true; // we changed the interval -> check same version with new interval
-				}
-			}
-		}
-
-		return [$toDelete, $size];
-	}
-
-	/**
-	 * Schedule versions expiration for the given file
-	 *
-	 * @param string $uid owner of the file
-	 * @param string $fileName file/folder for which to schedule expiration
-	 */
-	public static function scheduleExpire($uid, $fileName) {
-		// let the admin disable auto expire
-		$expiration = self::getExpiration();
-		if ($expiration->isEnabled()) {
-			$command = new Expire($uid, $fileName);
-			/** @var IBus $bus */
-			$bus = Server::get(IBus::class);
-			$bus->push($command);
-		}
-	}
-
-	/**
-	 * Expire versions which exceed the quota.
-	 *
-	 * This will setup the filesystem for the given user but will not
-	 * tear it down afterwards.
-	 *
-	 * @param string $filename path to file to expire
-	 * @param string $uid user for which to expire the version
-	 * @return bool|int|null
-	 */
-	public static function expire($filename, $uid) {
-		$expiration = self::getExpiration();
-
-		/** @var LoggerInterface $logger */
-		$logger = Server::get(LoggerInterface::class);
-
-		if ($expiration->isEnabled()) {
-			// get available disk space for user
-			$user = Server::get(IUserManager::class)->get($uid);
-			if (is_null($user)) {
-				$logger->error('Backends provided no user object for ' . $uid, ['app' => 'files_versions']);
-				throw new NoUserException('Backends provided no user object for ' . $uid);
-			}
-
-			\OC_Util::setupFS($uid);
-
-			try {
-				if (!Filesystem::file_exists($filename)) {
-					return false;
-				}
-			} catch (StorageNotAvailableException $e) {
-				// if we can't check that the file hasn't been deleted we can only assume that it hasn't
-				// note that this `StorageNotAvailableException` is about the file the versions originate from,
-				// not the storage that the versions are stored on
-			}
-
-			if (empty($filename)) {
-				// file maybe renamed or deleted
-				return false;
-			}
-			$versionsFileview = new View('/' . $uid . '/files_versions');
-
-			$softQuota = true;
-			$quota = $user->getQuota();
-			if ($quota === null || $quota === 'none') {
-				$quota = Filesystem::free_space('/');
-				$softQuota = false;
-			} else {
-				$quota = Util::computerFileSize($quota);
-			}
-
-			// make sure that we have the current size of the version history
-			$versionsSize = self::getVersionsSize($uid);
-
-			// calculate available space for version history
-			// subtract size of files and current versions size from quota
-			if ($quota >= 0) {
-				if ($softQuota) {
-					$root = Server::get(IRootFolder::class);
-					$userFolder = $root->getUserFolder($uid);
-					if (is_null($userFolder)) {
-						$availableSpace = 0;
-					} else {
-						$free = $quota - $userFolder->getSize(false); // remaining free space for user
-						if ($free > 0) {
-							$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $versionsSize; // how much space can be used for versions
-						} else {
-							$availableSpace = $free - $versionsSize;
-						}
-					}
-				} else {
-					$availableSpace = $quota;
-				}
-			} else {
-				$availableSpace = PHP_INT_MAX;
-			}
-
-			$allVersions = Storage::getVersions($uid, $filename);
-
-			$time = time();
-			[$toDelete, $sizeOfDeletedVersions] = self::getExpireList($time, $allVersions, $availableSpace <= 0);
-
-			$availableSpace = $availableSpace + $sizeOfDeletedVersions;
-			$versionsSize = $versionsSize - $sizeOfDeletedVersions;
-
-			// if still not enough free space we rearrange the versions from all files
-			if ($availableSpace <= 0) {
-				$result = self::getAllVersions($uid);
-				$allVersions = $result['all'];
-
-				foreach ($result['by_file'] as $versions) {
-					[$toDeleteNew, $size] = self::getExpireList($time, $versions, $availableSpace <= 0);
-					$toDelete = array_merge($toDelete, $toDeleteNew);
-					$sizeOfDeletedVersions += $size;
-				}
-				$availableSpace = $availableSpace + $sizeOfDeletedVersions;
-				$versionsSize = $versionsSize - $sizeOfDeletedVersions;
-			}
-
-			foreach ($toDelete as $key => $path) {
-				// Make sure to cleanup version table relations as expire does not pass deleteVersion
-				try {
-					/** @var VersionsMapper $versionsMapper */
-					$versionsMapper = Server::get(VersionsMapper::class);
-					$file = Server::get(IRootFolder::class)->getUserFolder($uid)->get($filename);
-					$pathparts = pathinfo($path);
-					$timestamp = (int)substr($pathparts['extension'] ?? '', 1);
-					$versionEntity = $versionsMapper->findVersionForFileId($file->getId(), $timestamp);
-					if ($versionEntity->getMetadataValue('label') !== null && $versionEntity->getMetadataValue('label') !== '') {
-						continue;
-					}
-					$versionsMapper->delete($versionEntity);
-				} catch (DoesNotExistException $e) {
-				}
-
-				\OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $path, 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED]);
-				self::deleteVersion($versionsFileview, $path);
-				\OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $path, 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED]);
-				unset($allVersions[$key]); // update array with the versions we keep
-				$logger->info('Expire: ' . $path, ['app' => 'files_versions']);
-			}
-
-			// Check if enough space is available after versions are rearranged.
-			// If not we delete the oldest versions until we meet the size limit for versions,
-			// but always keep the two latest versions
-			$numOfVersions = count($allVersions) - 2 ;
-			$i = 0;
-			// sort oldest first and make sure that we start at the first element
-			ksort($allVersions);
-			reset($allVersions);
-			while ($availableSpace < 0 && $i < $numOfVersions) {
-				$version = current($allVersions);
-				\OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $version['path'] . '.v' . $version['version'], 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED]);
-				self::deleteVersion($versionsFileview, $version['path'] . '.v' . $version['version']);
-				\OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $version['path'] . '.v' . $version['version'], 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED]);
-				$logger->info('running out of space! Delete oldest version: ' . $version['path'] . '.v' . $version['version'], ['app' => 'files_versions']);
-				$versionsSize -= $version['size'];
-				$availableSpace += $version['size'];
-				next($allVersions);
-				$i++;
-			}
-
-			return $versionsSize; // finally return the new size of the version history
-		}
-
-		return false;
-	}
-
-	/**
-	 * Create recursively missing directories inside of files_versions
-	 * that match the given path to a file.
-	 *
-	 * @param string $filename $path to a file, relative to the user's
-	 *                         "files" folder
-	 * @param View $view view on data/user/
-	 */
-	public static function createMissingDirectories($filename, $view) {
-		$dirname = Filesystem::normalizePath(dirname($filename));
-		$dirParts = explode('/', $dirname);
-		$dir = '/files_versions';
-		foreach ($dirParts as $part) {
-			$dir = $dir . '/' . $part;
-			if (!$view->file_exists($dir)) {
-				$view->mkdir($dir);
-			}
-		}
-	}
-
-	/**
-	 * Static workaround
-	 * @return Expiration
-	 */
-	protected static function getExpiration() {
-		if (self::$application === null) {
-			self::$application = Server::get(Application::class);
-		}
-		return self::$application->getContainer()->get(Expiration::class);
-	}
+    public const DEFAULTENABLED = true;
+    public const DEFAULTMAXSIZE = 50; // unit: percentage; 50% of available disk space/quota
+    public const VERSIONS_ROOT = 'files_versions/';
+
+    public const DELETE_TRIGGER_MASTER_REMOVED = 0;
+    public const DELETE_TRIGGER_RETENTION_CONSTRAINT = 1;
+    public const DELETE_TRIGGER_QUOTA_EXCEEDED = 2;
+
+    // files for which we can remove the versions after the delete operation was successful
+    private static $deletedFiles = [];
+
+    private static $sourcePathAndUser = [];
+
+    private static $max_versions_per_interval = [
+        //first 10sec, one version every 2sec
+        1 => ['intervalEndsAfter' => 10,      'step' => 2],
+        //next minute, one version every 10sec
+        2 => ['intervalEndsAfter' => 60,      'step' => 10],
+        //next hour, one version every minute
+        3 => ['intervalEndsAfter' => 3600,    'step' => 60],
+        //next 24h, one version every hour
+        4 => ['intervalEndsAfter' => 86400,   'step' => 3600],
+        //next 30days, one version per day
+        5 => ['intervalEndsAfter' => 2592000, 'step' => 86400],
+        //until the end one version per week
+        6 => ['intervalEndsAfter' => -1,      'step' => 604800],
+    ];
+
+    /** @var Application */
+    private static $application;
+
+    /**
+     * get the UID of the owner of the file and the path to the file relative to
+     * owners files folder
+     *
+     * @param string $filename
+     * @return array
+     * @throws NoUserException
+     */
+    public static function getUidAndFilename($filename) {
+        $uid = Filesystem::getOwner($filename);
+        $userManager = Server::get(IUserManager::class);
+        // if the user with the UID doesn't exists, e.g. because the UID points
+        // to a remote user with a federated cloud ID we use the current logged-in
+        // user. We need a valid local user to create the versions
+        if (!$userManager->userExists($uid)) {
+            $uid = OC_User::getUser();
+        }
+        Filesystem::initMountPoints($uid);
+        if ($uid !== OC_User::getUser()) {
+            $info = Filesystem::getFileInfo($filename);
+            $ownerView = new View('/' . $uid . '/files');
+            try {
+                $filename = $ownerView->getPath($info['fileid']);
+                // make sure that the file name doesn't end with a trailing slash
+                // can for example happen single files shared across servers
+                $filename = rtrim($filename, '/');
+            } catch (NotFoundException $e) {
+                $filename = null;
+            }
+        }
+        return [$uid, $filename];
+    }
+
+    /**
+     * Remember the owner and the owner path of the source file
+     *
+     * @param string $source source path
+     */
+    public static function setSourcePathAndUser($source) {
+        [$uid, $path] = self::getUidAndFilename($source);
+        self::$sourcePathAndUser[$source] = ['uid' => $uid, 'path' => $path];
+    }
+
+    /**
+     * Gets the owner and the owner path from the source path
+     *
+     * @param string $source source path
+     * @return array with user id and path
+     */
+    public static function getSourcePathAndUser($source) {
+        if (isset(self::$sourcePathAndUser[$source])) {
+            $uid = self::$sourcePathAndUser[$source]['uid'];
+            $path = self::$sourcePathAndUser[$source]['path'];
+            unset(self::$sourcePathAndUser[$source]);
+        } else {
+            $uid = $path = false;
+        }
+        return [$uid, $path];
+    }
+
+    /**
+     * get current size of all versions from a given user
+     *
+     * @param string $user user who owns the versions
+     * @return int versions size
+     */
+    private static function getVersionsSize($user) {
+        $view = new View('/' . $user);
+        $fileInfo = $view->getFileInfo('/files_versions');
+        return isset($fileInfo['size']) ? $fileInfo['size'] : 0;
+    }
+
+    /**
+     * store a new version of a file.
+     */
+    public static function store($filename) {
+        // if the file gets streamed we need to remove the .part extension
+        // to get the right target
+        $ext = pathinfo($filename, PATHINFO_EXTENSION);
+        if ($ext === 'part') {
+            $filename = substr($filename, 0, -5);
+        }
+
+        // we only handle existing files
+        if (! Filesystem::file_exists($filename) || Filesystem::is_dir($filename)) {
+            return false;
+        }
+
+        // since hook paths are always relative to the "default filesystem view"
+        // we always use the owner from there to get the full node
+        $uid = Filesystem::getView()->getOwner('');
+
+        /** @var IRootFolder $rootFolder */
+        $rootFolder = Server::get(IRootFolder::class);
+        $userFolder = $rootFolder->getUserFolder($uid);
+
+        $eventDispatcher = Server::get(IEventDispatcher::class);
+        try {
+            $file = $userFolder->get($filename);
+        } catch (NotFoundException $e) {
+            return false;
+        }
+
+        $mount = $file->getMountPoint();
+        if ($mount instanceof SharedMount) {
+            $ownerFolder = $rootFolder->getUserFolder($mount->getShare()->getShareOwner());
+            $ownerNode = $ownerFolder->getFirstNodeById($file->getId());
+            if ($ownerNode) {
+                $file = $ownerNode;
+                $uid = $mount->getShare()->getShareOwner();
+            }
+        }
+
+        /** @var IUserManager $userManager */
+        $userManager = Server::get(IUserManager::class);
+        $user = $userManager->get($uid);
+
+        if (!$user) {
+            return false;
+        }
+
+        // no use making versions for empty files
+        if ($file->getSize() === 0) {
+            return false;
+        }
+
+        $event = new CreateVersionEvent($file);
+        $eventDispatcher->dispatch('OCA\Files_Versions::createVersion', $event);
+        if ($event->shouldCreateVersion() === false) {
+            return false;
+        }
+
+        /** @var IVersionManager $versionManager */
+        $versionManager = Server::get(IVersionManager::class);
+
+        $versionManager->createVersion($user, $file);
+    }
+
+
+    /**
+     * mark file as deleted so that we can remove the versions if the file is gone
+     * @param string $path
+     */
+    public static function markDeletedFile($path) {
+        [$uid, $filename] = self::getUidAndFilename($path);
+        self::$deletedFiles[$path] = [
+            'uid' => $uid,
+            'filename' => $filename];
+    }
+
+    /**
+     * delete the version from the storage and cache
+     *
+     * @param View $view
+     * @param string $path
+     */
+    protected static function deleteVersion($view, $path) {
+        $view->unlink($path);
+        /**
+         * @var \OC\Files\Storage\Storage $storage
+         * @var string $internalPath
+         */
+        [$storage, $internalPath] = $view->resolvePath($path);
+        $cache = $storage->getCache($internalPath);
+        $cache->remove($internalPath);
+    }
+
+    /**
+     * Delete versions of a file
+     */
+    public static function delete($path) {
+        $deletedFile = self::$deletedFiles[$path];
+        $uid = $deletedFile['uid'];
+        $filename = $deletedFile['filename'];
+
+        if (!Filesystem::file_exists($path)) {
+            $view = new View('/' . $uid . '/files_versions');
+
+            $versions = self::getVersions($uid, $filename);
+            if (!empty($versions)) {
+                foreach ($versions as $v) {
+                    \OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $path . $v['version'], 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED]);
+                    self::deleteVersion($view, $filename . '.v' . $v['version']);
+                    \OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $path . $v['version'], 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED]);
+                }
+            }
+        }
+        unset(self::$deletedFiles[$path]);
+    }
+
+    /**
+     * Delete a version of a file
+     */
+    public static function deleteRevision(string $path, int $revision): void {
+        [$uid, $filename] = self::getUidAndFilename($path);
+        $view = new View('/' . $uid . '/files_versions');
+        \OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $path . $revision, 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED]);
+        self::deleteVersion($view, $filename . '.v' . $revision);
+        \OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $path . $revision, 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED]);
+    }
+
+    /**
+     * Rename or copy versions of a file of the given paths
+     *
+     * @param string $sourcePath source path of the file to move, relative to
+     *                           the currently logged in user's "files" folder
+     * @param string $targetPath target path of the file to move, relative to
+     *                           the currently logged in user's "files" folder
+     * @param string $operation can be 'copy' or 'rename'
+     */
+    public static function renameOrCopy($sourcePath, $targetPath, $operation) {
+        [$sourceOwner, $sourcePath] = self::getSourcePathAndUser($sourcePath);
+
+        // it was a upload of a existing file if no old path exists
+        // in this case the pre-hook already called the store method and we can
+        // stop here
+        if ($sourcePath === false) {
+            return true;
+        }
+
+        [$targetOwner, $targetPath] = self::getUidAndFilename($targetPath);
+
+        $sourcePath = ltrim($sourcePath, '/');
+        $targetPath = ltrim($targetPath, '/');
+
+        $rootView = new View('');
+
+        // did we move a directory ?
+        if ($rootView->is_dir('/' . $targetOwner . '/files/' . $targetPath)) {
+            // does the directory exists for versions too ?
+            if ($rootView->is_dir('/' . $sourceOwner . '/files_versions/' . $sourcePath)) {
+                // create missing dirs if necessary
+                self::createMissingDirectories($targetPath, new View('/' . $targetOwner));
+
+                // move the directory containing the versions
+                $rootView->$operation(
+                    '/' . $sourceOwner . '/files_versions/' . $sourcePath,
+                    '/' . $targetOwner . '/files_versions/' . $targetPath
+                );
+            }
+        } elseif ($versions = Storage::getVersions($sourceOwner, '/' . $sourcePath)) {
+            // create missing dirs if necessary
+            self::createMissingDirectories($targetPath, new View('/' . $targetOwner));
+
+            foreach ($versions as $v) {
+                // move each version one by one to the target directory
+                $rootView->$operation(
+                    '/' . $sourceOwner . '/files_versions/' . $sourcePath . '.v' . $v['version'],
+                    '/' . $targetOwner . '/files_versions/' . $targetPath . '.v' . $v['version']
+                );
+            }
+        }
+
+        // if we moved versions directly for a file, schedule expiration check for that file
+        if (!$rootView->is_dir('/' . $targetOwner . '/files/' . $targetPath)) {
+            self::scheduleExpire($targetOwner, $targetPath);
+        }
+    }
+
+    /**
+     * Rollback to an old version of a file.
+     *
+     * @param string $file file name
+     * @param int $revision revision timestamp
+     * @return bool
+     */
+    public static function rollback(string $file, int $revision, IUser $user) {
+        // add expected leading slash
+        $filename = '/' . ltrim($file, '/');
+
+        // Fetch the userfolder to trigger view hooks
+        $root = Server::get(IRootFolder::class);
+        $userFolder = $root->getUserFolder($user->getUID());
+
+        $users_view = new View('/' . $user->getUID());
+        $files_view = new View('/' . $user->getUID() . '/files');
+
+        $versionCreated = false;
+
+        $fileInfo = $files_view->getFileInfo($file);
+
+        // check if user has the permissions to revert a version
+        if (!$fileInfo->isUpdateable()) {
+            return false;
+        }
+
+        //first create a new version
+        $version = 'files_versions' . $filename . '.v' . $users_view->filemtime('files' . $filename);
+        if (!$users_view->file_exists($version)) {
+            $users_view->copy('files' . $filename, 'files_versions' . $filename . '.v' . $users_view->filemtime('files' . $filename));
+            $versionCreated = true;
+        }
+
+        $fileToRestore = 'files_versions' . $filename . '.v' . $revision;
+
+        // Restore encrypted version of the old file for the newly restored file
+        // This has to happen manually here since the file is manually copied below
+        $oldVersion = $users_view->getFileInfo($fileToRestore)->getEncryptedVersion();
+        $oldFileInfo = $users_view->getFileInfo($fileToRestore);
+        $cache = $fileInfo->getStorage()->getCache();
+        $cache->update(
+            $fileInfo->getId(), [
+                'encrypted' => $oldVersion,
+                'encryptedVersion' => $oldVersion,
+                'size' => $oldFileInfo->getData()['size'],
+                'unencrypted_size' => $oldFileInfo->getData()['unencrypted_size'],
+            ]
+        );
+
+        // rollback
+        if (self::copyFileContents($users_view, $fileToRestore, 'files' . $filename)) {
+            $files_view->touch($file, $revision);
+            Storage::scheduleExpire($user->getUID(), $file);
+
+            return true;
+        } elseif ($versionCreated) {
+            self::deleteVersion($users_view, $version);
+        }
+
+        return false;
+    }
+
+    /**
+     * Stream copy file contents from $path1 to $path2
+     *
+     * @param View $view view to use for copying
+     * @param string $path1 source file to copy
+     * @param string $path2 target file
+     *
+     * @return bool true for success, false otherwise
+     */
+    private static function copyFileContents($view, $path1, $path2) {
+        /** @var \OC\Files\Storage\Storage $storage1 */
+        [$storage1, $internalPath1] = $view->resolvePath($path1);
+        /** @var \OC\Files\Storage\Storage $storage2 */
+        [$storage2, $internalPath2] = $view->resolvePath($path2);
+
+        $view->lockFile($path1, ILockingProvider::LOCK_EXCLUSIVE);
+        $view->lockFile($path2, ILockingProvider::LOCK_EXCLUSIVE);
+
+        try {
+            // TODO add a proper way of overwriting a file while maintaining file ids
+            if ($storage1->instanceOfStorage(\OC\Files\ObjectStore\ObjectStoreStorage::class)
+                || $storage2->instanceOfStorage(\OC\Files\ObjectStore\ObjectStoreStorage::class)
+            ) {
+                $source = $storage1->fopen($internalPath1, 'r');
+                $result = $source !== false;
+                if ($result) {
+                    if ($storage2->instanceOfStorage(IWriteStreamStorage::class)) {
+                        /** @var IWriteStreamStorage $storage2 */
+                        $storage2->writeStream($internalPath2, $source);
+                    } else {
+                        $target = $storage2->fopen($internalPath2, 'w');
+                        $result = $target !== false;
+                        if ($target !== false) {
+                            [, $result] = Files::streamCopy($source, $target, true);
+                            fclose($target);
+                        }
+                    }
+                    fclose($source);
+                }
+
+                if ($result !== false) {
+                    $storage1->unlink($internalPath1);
+                }
+            } else {
+                $result = $storage2->moveFromStorage($storage1, $internalPath1, $internalPath2);
+            }
+        } finally {
+            $view->unlockFile($path1, ILockingProvider::LOCK_EXCLUSIVE);
+            $view->unlockFile($path2, ILockingProvider::LOCK_EXCLUSIVE);
+        }
+
+        return ($result !== false);
+    }
+
+    /**
+     * get a list of all available versions of a file in descending chronological order
+     * @param string $uid user id from the owner of the file
+     * @param string $filename file to find versions of, relative to the user files dir
+     * @param string $userFullPath
+     * @return array versions newest version first
+     */
+    public static function getVersions($uid, $filename, $userFullPath = '') {
+        $versions = [];
+        if (empty($filename)) {
+            return $versions;
+        }
+        // fetch for old versions
+        $view = new View('/' . $uid . '/');
+
+        $pathinfo = pathinfo($filename);
+        $versionedFile = $pathinfo['basename'];
+
+        $dir = Filesystem::normalizePath(self::VERSIONS_ROOT . '/' . $pathinfo['dirname']);
+
+        $dirContent = false;
+        if ($view->is_dir($dir)) {
+            $dirContent = $view->opendir($dir);
+        }
+
+        if ($dirContent === false) {
+            return $versions;
+        }
+
+        if (is_resource($dirContent)) {
+            while (($entryName = readdir($dirContent)) !== false) {
+                if (!Filesystem::isIgnoredDir($entryName)) {
+                    $pathparts = pathinfo($entryName);
+                    $filename = $pathparts['filename'];
+                    if ($filename === $versionedFile) {
+                        $pathparts = pathinfo($entryName);
+                        $timestamp = substr($pathparts['extension'] ?? '', 1);
+                        if (!is_numeric($timestamp)) {
+                            Server::get(LoggerInterface::class)->error(
+                                'Version file {path} has incorrect name format',
+                                [
+                                    'path' => $entryName,
+                                    'app' => 'files_versions',
+                                ]
+                            );
+                            continue;
+                        }
+                        $filename = $pathparts['filename'];
+                        $key = $timestamp . '#' . $filename;
+                        $versions[$key]['version'] = $timestamp;
+                        $versions[$key]['humanReadableTimestamp'] = self::getHumanReadableTimestamp((int)$timestamp);
+                        if (empty($userFullPath)) {
+                            $versions[$key]['preview'] = '';
+                        } else {
+                            /** @var IURLGenerator $urlGenerator */
+                            $urlGenerator = Server::get(IURLGenerator::class);
+                            $versions[$key]['preview'] = $urlGenerator->linkToRoute('files_version.Preview.getPreview',
+                                ['file' => $userFullPath, 'version' => $timestamp]);
+                        }
+                        $versions[$key]['path'] = Filesystem::normalizePath($pathinfo['dirname'] . '/' . $filename);
+                        $versions[$key]['name'] = $versionedFile;
+                        $versions[$key]['size'] = $view->filesize($dir . '/' . $entryName);
+                        $versions[$key]['mimetype'] = Server::get(IMimeTypeDetector::class)->detectPath($versionedFile);
+                    }
+                }
+            }
+            closedir($dirContent);
+        }
+
+        // sort with newest version first
+        krsort($versions);
+
+        return $versions;
+    }
+
+    /**
+     * Expire versions that older than max version retention time
+     *
+     * @param string $uid
+     */
+    public static function expireOlderThanMaxForUser($uid) {
+        /** @var IRootFolder $root */
+        $root = Server::get(IRootFolder::class);
+        try {
+            /** @var Folder $versionsRoot */
+            $versionsRoot = $root->get('/' . $uid . '/files_versions');
+        } catch (NotFoundException $e) {
+            return;
+        }
+
+        $expiration = self::getExpiration();
+        $threshold = $expiration->getMaxAgeAsTimestamp();
+        if (!$threshold) {
+            return;
+        }
+
+        $allVersions = $versionsRoot->search(new SearchQuery(
+            new SearchBinaryOperator(ISearchBinaryOperator::OPERATOR_NOT, [
+                new SearchComparison(ISearchComparison::COMPARE_EQUAL, 'mimetype', FileInfo::MIMETYPE_FOLDER),
+            ]),
+            0,
+            0,
+            []
+        ));
+
+        /** @var VersionsMapper $versionsMapper */
+        $versionsMapper = Server::get(VersionsMapper::class);
+        $userFolder = $root->getUserFolder($uid);
+        $versionEntities = [];
+
+        /** @var Node[] $versions */
+        $versions = array_filter($allVersions, function (Node $info) use ($threshold, $userFolder, $versionsMapper, $versionsRoot, &$versionEntities) {
+            // Check that the file match '*.v*'
+            $versionsBegin = strrpos($info->getName(), '.v');
+            if ($versionsBegin === false) {
+                return false;
+            }
+
+            $version = (int)substr($info->getName(), $versionsBegin + 2);
+
+            // Check that the version does not have a label.
+            $path = $versionsRoot->getRelativePath($info->getPath());
+            if ($path === null) {
+                throw new DoesNotExistException('Could not find relative path of (' . $info->getPath() . ')');
+            }
+
+            try {
+                $node = $userFolder->get(substr($path, 0, -strlen('.v' . $version)));
+                $versionEntity = $versionsMapper->findVersionForFileId($node->getId(), $version);
+                $versionEntities[$info->getId()] = $versionEntity;
+
+                if ($versionEntity->getMetadataValue('label') !== null && $versionEntity->getMetadataValue('label') !== '') {
+                    return false;
+                }
+            } catch (NotFoundException $e) {
+                // Original node not found, delete the version
+                return true;
+            } catch (StorageNotAvailableException|StorageInvalidException $e) {
+                // Storage can't be used, but it might only be temporary so we can't always delete the version
+                // since we can't determine if the version is named we take the safe route and don't expire
+                return false;
+            } catch (DoesNotExistException $ex) {
+                // Version on FS can have no equivalent in the DB if they were created before the version naming feature.
+                // So we ignore DoesNotExistException.
+            }
+
+            // Check that the version's timestamp is lower than $threshold
+            return $version < $threshold;
+        });
+
+        foreach ($versions as $version) {
+            $internalPath = $version->getInternalPath();
+            \OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $internalPath, 'trigger' => self::DELETE_TRIGGER_RETENTION_CONSTRAINT]);
+
+            $versionEntity = isset($versionEntities[$version->getId()]) ? $versionEntities[$version->getId()] : null;
+            if (!is_null($versionEntity)) {
+                $versionsMapper->delete($versionEntity);
+            }
+
+            try {
+                $version->delete();
+                \OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $internalPath, 'trigger' => self::DELETE_TRIGGER_RETENTION_CONSTRAINT]);
+            } catch (NotPermittedException $e) {
+                Server::get(LoggerInterface::class)->error("Missing permissions to delete version: {$internalPath}", ['app' => 'files_versions', 'exception' => $e]);
+            }
+        }
+    }
+
+    /**
+     * translate a timestamp into a string like "5 days ago"
+     *
+     * @param int $timestamp
+     * @return string for example "5 days ago"
+     */
+    private static function getHumanReadableTimestamp(int $timestamp): string {
+        $diff = time() - $timestamp;
+
+        if ($diff < 60) { // first minute
+            return  $diff . ' seconds ago';
+        } elseif ($diff < 3600) { //first hour
+            return round($diff / 60) . ' minutes ago';
+        } elseif ($diff < 86400) { // first day
+            return round($diff / 3600) . ' hours ago';
+        } elseif ($diff < 604800) { //first week
+            return round($diff / 86400) . ' days ago';
+        } elseif ($diff < 2419200) { //first month
+            return round($diff / 604800) . ' weeks ago';
+        } elseif ($diff < 29030400) { // first year
+            return round($diff / 2419200) . ' months ago';
+        } else {
+            return round($diff / 29030400) . ' years ago';
+        }
+    }
+
+    /**
+     * returns all stored file versions from a given user
+     * @param string $uid id of the user
+     * @return array with contains two arrays 'all' which contains all versions sorted by age and 'by_file' which contains all versions sorted by filename
+     */
+    private static function getAllVersions($uid) {
+        $view = new View('/' . $uid . '/');
+        $dirs = [self::VERSIONS_ROOT];
+        $versions = [];
+
+        while (!empty($dirs)) {
+            $dir = array_pop($dirs);
+            $files = $view->getDirectoryContent($dir);
+
+            foreach ($files as $file) {
+                $fileData = $file->getData();
+                $filePath = $dir . '/' . $fileData['name'];
+                if ($file['type'] === 'dir') {
+                    $dirs[] = $filePath;
+                } else {
+                    $versionsBegin = strrpos($filePath, '.v');
+                    $relPathStart = strlen(self::VERSIONS_ROOT);
+                    $version = substr($filePath, $versionsBegin + 2);
+                    $relpath = substr($filePath, $relPathStart, $versionsBegin - $relPathStart);
+                    $key = $version . '#' . $relpath;
+                    $versions[$key] = ['path' => $relpath, 'timestamp' => $version];
+                }
+            }
+        }
+
+        // newest version first
+        krsort($versions);
+
+        $result = [
+            'all' => [],
+            'by_file' => [],
+        ];
+
+        foreach ($versions as $key => $value) {
+            $size = $view->filesize(self::VERSIONS_ROOT . '/' . $value['path'] . '.v' . $value['timestamp']);
+            $filename = $value['path'];
+
+            $result['all'][$key]['version'] = $value['timestamp'];
+            $result['all'][$key]['path'] = $filename;
+            $result['all'][$key]['size'] = $size;
+
+            $result['by_file'][$filename][$key]['version'] = $value['timestamp'];
+            $result['by_file'][$filename][$key]['path'] = $filename;
+            $result['by_file'][$filename][$key]['size'] = $size;
+        }
+
+        return $result;
+    }
+
+    /**
+     * get list of files we want to expire
+     * @param array $versions list of versions
+     * @param integer $time
+     * @param bool $quotaExceeded is versions storage limit reached
+     * @return array containing the list of to deleted versions and the size of them
+     */
+    protected static function getExpireList($time, $versions, $quotaExceeded = false) {
+        $expiration = self::getExpiration();
+
+        if ($expiration->shouldAutoExpire()) {
+            // Exclude versions that are newer than the minimum age from the auto expiration logic.
+            $minAge = $expiration->getMinAgeAsTimestamp();
+            if ($minAge !== false) {
+                $versionsToAutoExpire = array_filter($versions, fn ($version) => $version['version'] < $minAge);
+            } else {
+                $versionsToAutoExpire = $versions;
+            }
+
+            [$toDelete, $size] = self::getAutoExpireList($time, $versionsToAutoExpire);
+        } else {
+            $size = 0;
+            $toDelete = [];  // versions we want to delete
+        }
+
+        foreach ($versions as $key => $version) {
+            if (!is_numeric($version['version'])) {
+                Server::get(LoggerInterface::class)->error(
+                    'Found a non-numeric timestamp version: ' . json_encode($version),
+                    ['app' => 'files_versions']);
+                continue;
+            }
+            if ($expiration->isExpired((int)($version['version']), $quotaExceeded) && !isset($toDelete[$key])) {
+                $size += $version['size'];
+                $toDelete[$key] = $version['path'] . '.v' . $version['version'];
+            }
+        }
+
+        return [$toDelete, $size];
+    }
+
+    /**
+     * get list of files we want to expire
+     * @param array $versions list of versions
+     * @param integer $time
+     * @return array containing the list of to deleted versions and the size of them
+     */
+    protected static function getAutoExpireList($time, $versions) {
+        $size = 0;
+        $toDelete = [];  // versions we want to delete
+
+        $interval = 1;
+        $step = Storage::$max_versions_per_interval[$interval]['step'];
+        if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] === -1) {
+            $nextInterval = -1;
+        } else {
+            $nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
+        }
+
+        $firstVersion = reset($versions);
+
+        if ($firstVersion === false) {
+            return [$toDelete, $size];
+        }
+
+        $firstKey = key($versions);
+        $prevTimestamp = $firstVersion['version'];
+        $nextVersion = $firstVersion['version'] - $step;
+        unset($versions[$firstKey]);
+
+        foreach ($versions as $key => $version) {
+            $newInterval = true;
+            while ($newInterval) {
+                if ($nextInterval === -1 || $prevTimestamp > $nextInterval) {
+                    if ($version['version'] > $nextVersion) {
+                        //distance between two version too small, mark to delete
+                        $toDelete[$key] = $version['path'] . '.v' . $version['version'];
+                        $size += $version['size'];
+                        Server::get(LoggerInterface::class)->info('Mark to expire ' . $version['path'] . ' next version should be ' . $nextVersion . ' or smaller. (prevTimestamp: ' . $prevTimestamp . '; step: ' . $step, ['app' => 'files_versions']);
+                    } else {
+                        $nextVersion = $version['version'] - $step;
+                        $prevTimestamp = $version['version'];
+                    }
+                    $newInterval = false; // version checked so we can move to the next one
+                } else { // time to move on to the next interval
+                    $interval++;
+                    $step = Storage::$max_versions_per_interval[$interval]['step'];
+                    $nextVersion = $prevTimestamp - $step;
+                    if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] === -1) {
+                        $nextInterval = -1;
+                    } else {
+                        $nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
+                    }
+                    $newInterval = true; // we changed the interval -> check same version with new interval
+                }
+            }
+        }
+
+        return [$toDelete, $size];
+    }
+
+    /**
+     * Schedule versions expiration for the given file
+     *
+     * @param string $uid owner of the file
+     * @param string $fileName file/folder for which to schedule expiration
+     */
+    public static function scheduleExpire($uid, $fileName) {
+        // let the admin disable auto expire
+        $expiration = self::getExpiration();
+        if ($expiration->isEnabled()) {
+            $command = new Expire($uid, $fileName);
+            /** @var IBus $bus */
+            $bus = Server::get(IBus::class);
+            $bus->push($command);
+        }
+    }
+
+    /**
+     * Expire versions which exceed the quota.
+     *
+     * This will setup the filesystem for the given user but will not
+     * tear it down afterwards.
+     *
+     * @param string $filename path to file to expire
+     * @param string $uid user for which to expire the version
+     * @return bool|int|null
+     */
+    public static function expire($filename, $uid) {
+        $expiration = self::getExpiration();
+
+        /** @var LoggerInterface $logger */
+        $logger = Server::get(LoggerInterface::class);
+
+        if ($expiration->isEnabled()) {
+            // get available disk space for user
+            $user = Server::get(IUserManager::class)->get($uid);
+            if (is_null($user)) {
+                $logger->error('Backends provided no user object for ' . $uid, ['app' => 'files_versions']);
+                throw new NoUserException('Backends provided no user object for ' . $uid);
+            }
+
+            \OC_Util::setupFS($uid);
+
+            try {
+                if (!Filesystem::file_exists($filename)) {
+                    return false;
+                }
+            } catch (StorageNotAvailableException $e) {
+                // if we can't check that the file hasn't been deleted we can only assume that it hasn't
+                // note that this `StorageNotAvailableException` is about the file the versions originate from,
+                // not the storage that the versions are stored on
+            }
+
+            if (empty($filename)) {
+                // file maybe renamed or deleted
+                return false;
+            }
+            $versionsFileview = new View('/' . $uid . '/files_versions');
+
+            $softQuota = true;
+            $quota = $user->getQuota();
+            if ($quota === null || $quota === 'none') {
+                $quota = Filesystem::free_space('/');
+                $softQuota = false;
+            } else {
+                $quota = Util::computerFileSize($quota);
+            }
+
+            // make sure that we have the current size of the version history
+            $versionsSize = self::getVersionsSize($uid);
+
+            // calculate available space for version history
+            // subtract size of files and current versions size from quota
+            if ($quota >= 0) {
+                if ($softQuota) {
+                    $root = Server::get(IRootFolder::class);
+                    $userFolder = $root->getUserFolder($uid);
+                    if (is_null($userFolder)) {
+                        $availableSpace = 0;
+                    } else {
+                        $free = $quota - $userFolder->getSize(false); // remaining free space for user
+                        if ($free > 0) {
+                            $availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $versionsSize; // how much space can be used for versions
+                        } else {
+                            $availableSpace = $free - $versionsSize;
+                        }
+                    }
+                } else {
+                    $availableSpace = $quota;
+                }
+            } else {
+                $availableSpace = PHP_INT_MAX;
+            }
+
+            $allVersions = Storage::getVersions($uid, $filename);
+
+            $time = time();
+            [$toDelete, $sizeOfDeletedVersions] = self::getExpireList($time, $allVersions, $availableSpace <= 0);
+
+            $availableSpace = $availableSpace + $sizeOfDeletedVersions;
+            $versionsSize = $versionsSize - $sizeOfDeletedVersions;
+
+            // if still not enough free space we rearrange the versions from all files
+            if ($availableSpace <= 0) {
+                $result = self::getAllVersions($uid);
+                $allVersions = $result['all'];
+
+                foreach ($result['by_file'] as $versions) {
+                    [$toDeleteNew, $size] = self::getExpireList($time, $versions, $availableSpace <= 0);
+                    $toDelete = array_merge($toDelete, $toDeleteNew);
+                    $sizeOfDeletedVersions += $size;
+                }
+                $availableSpace = $availableSpace + $sizeOfDeletedVersions;
+                $versionsSize = $versionsSize - $sizeOfDeletedVersions;
+            }
+
+            foreach ($toDelete as $key => $path) {
+                // Make sure to cleanup version table relations as expire does not pass deleteVersion
+                try {
+                    /** @var VersionsMapper $versionsMapper */
+                    $versionsMapper = Server::get(VersionsMapper::class);
+                    $file = Server::get(IRootFolder::class)->getUserFolder($uid)->get($filename);
+                    $pathparts = pathinfo($path);
+                    $timestamp = (int)substr($pathparts['extension'] ?? '', 1);
+                    $versionEntity = $versionsMapper->findVersionForFileId($file->getId(), $timestamp);
+                    if ($versionEntity->getMetadataValue('label') !== null && $versionEntity->getMetadataValue('label') !== '') {
+                        continue;
+                    }
+                    $versionsMapper->delete($versionEntity);
+                } catch (DoesNotExistException $e) {
+                }
+
+                \OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $path, 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED]);
+                self::deleteVersion($versionsFileview, $path);
+                \OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $path, 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED]);
+                unset($allVersions[$key]); // update array with the versions we keep
+                $logger->info('Expire: ' . $path, ['app' => 'files_versions']);
+            }
+
+            // Check if enough space is available after versions are rearranged.
+            // If not we delete the oldest versions until we meet the size limit for versions,
+            // but always keep the two latest versions
+            $numOfVersions = count($allVersions) - 2 ;
+            $i = 0;
+            // sort oldest first and make sure that we start at the first element
+            ksort($allVersions);
+            reset($allVersions);
+            while ($availableSpace < 0 && $i < $numOfVersions) {
+                $version = current($allVersions);
+                \OC_Hook::emit('\OCP\Versions', 'preDelete', ['path' => $version['path'] . '.v' . $version['version'], 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED]);
+                self::deleteVersion($versionsFileview, $version['path'] . '.v' . $version['version']);
+                \OC_Hook::emit('\OCP\Versions', 'delete', ['path' => $version['path'] . '.v' . $version['version'], 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED]);
+                $logger->info('running out of space! Delete oldest version: ' . $version['path'] . '.v' . $version['version'], ['app' => 'files_versions']);
+                $versionsSize -= $version['size'];
+                $availableSpace += $version['size'];
+                next($allVersions);
+                $i++;
+            }
+
+            return $versionsSize; // finally return the new size of the version history
+        }
+
+        return false;
+    }
+
+    /**
+     * Create recursively missing directories inside of files_versions
+     * that match the given path to a file.
+     *
+     * @param string $filename $path to a file, relative to the user's
+     *                         "files" folder
+     * @param View $view view on data/user/
+     */
+    public static function createMissingDirectories($filename, $view) {
+        $dirname = Filesystem::normalizePath(dirname($filename));
+        $dirParts = explode('/', $dirname);
+        $dir = '/files_versions';
+        foreach ($dirParts as $part) {
+            $dir = $dir . '/' . $part;
+            if (!$view->file_exists($dir)) {
+                $view->mkdir($dir);
+            }
+        }
+    }
+
+    /**
+     * Static workaround
+     * @return Expiration
+     */
+    protected static function getExpiration() {
+        if (self::$application === null) {
+            self::$application = Server::get(Application::class);
+        }
+        return self::$application->getContainer()->get(Expiration::class);
+    }
 }