nextcloud / server

lib/private/Files/Filesystem.php

Indentation +676 added lines, -676 removed lines

@@ -20,680 +20,680 @@
 use Psr\Log\LoggerInterface;
 
 class Filesystem {
-	private static ?Mount\Manager $mounts = null;
-
-	public static bool $loaded = false;
-
-	private static ?View $defaultInstance = null;
-
-	private static ?FilenameValidator $validator = null;
-
-	/**
-	 * classname which used for hooks handling
-	 * used as signalclass in OC_Hooks::emit()
-	 */
-	public const CLASSNAME = 'OC_Filesystem';
-
-	/**
-	 * signalname emitted before file renaming
-	 *
-	 * @param string $oldpath
-	 * @param string $newpath
-	 */
-	public const signal_rename = 'rename';
-
-	/**
-	 * signal emitted after file renaming
-	 *
-	 * @param string $oldpath
-	 * @param string $newpath
-	 */
-	public const signal_post_rename = 'post_rename';
-
-	/**
-	 * signal emitted before file/dir creation
-	 *
-	 * @param string $path
-	 * @param bool $run changing this flag to false in hook handler will cancel event
-	 */
-	public const signal_create = 'create';
-
-	/**
-	 * signal emitted after file/dir creation
-	 *
-	 * @param string $path
-	 * @param bool $run changing this flag to false in hook handler will cancel event
-	 */
-	public const signal_post_create = 'post_create';
-
-	/**
-	 * signal emits before file/dir copy
-	 *
-	 * @param string $oldpath
-	 * @param string $newpath
-	 * @param bool $run changing this flag to false in hook handler will cancel event
-	 */
-	public const signal_copy = 'copy';
-
-	/**
-	 * signal emits after file/dir copy
-	 *
-	 * @param string $oldpath
-	 * @param string $newpath
-	 */
-	public const signal_post_copy = 'post_copy';
-
-	/**
-	 * signal emits before file/dir save
-	 *
-	 * @param string $path
-	 * @param bool $run changing this flag to false in hook handler will cancel event
-	 */
-	public const signal_write = 'write';
-
-	/**
-	 * signal emits after file/dir save
-	 *
-	 * @param string $path
-	 */
-	public const signal_post_write = 'post_write';
-
-	/**
-	 * signal emitted before file/dir update
-	 *
-	 * @param string $path
-	 * @param bool $run changing this flag to false in hook handler will cancel event
-	 */
-	public const signal_update = 'update';
-
-	/**
-	 * signal emitted after file/dir update
-	 *
-	 * @param string $path
-	 * @param bool $run changing this flag to false in hook handler will cancel event
-	 */
-	public const signal_post_update = 'post_update';
-
-	/**
-	 * signal emits when reading file/dir
-	 *
-	 * @param string $path
-	 */
-	public const signal_read = 'read';
-
-	/**
-	 * signal emits when removing file/dir
-	 *
-	 * @param string $path
-	 */
-	public const signal_delete = 'delete';
-
-	/**
-	 * parameters definitions for signals
-	 */
-	public const signal_param_path = 'path';
-	public const signal_param_oldpath = 'oldpath';
-	public const signal_param_newpath = 'newpath';
-
-	/**
-	 * run - changing this flag to false in hook handler will cancel event
-	 */
-	public const signal_param_run = 'run';
-
-	public const signal_create_mount = 'create_mount';
-	public const signal_delete_mount = 'delete_mount';
-	public const signal_param_mount_type = 'mounttype';
-	public const signal_param_users = 'users';
-
-	private static ?\OC\Files\Storage\StorageFactory $loader = null;
-
-	private static bool $logWarningWhenAddingStorageWrapper = true;
-
-	/**
-	 * @param bool $shouldLog
-	 * @return bool previous value
-	 * @internal
-	 */
-	public static function logWarningWhenAddingStorageWrapper(bool $shouldLog): bool {
-		$previousValue = self::$logWarningWhenAddingStorageWrapper;
-		self::$logWarningWhenAddingStorageWrapper = $shouldLog;
-		return $previousValue;
-	}
-
-	/**
-	 * @param string $wrapperName
-	 * @param callable $wrapper
-	 * @param int $priority
-	 */
-	public static function addStorageWrapper($wrapperName, $wrapper, $priority = 50) {
-		if (self::$logWarningWhenAddingStorageWrapper) {
-			\OCP\Server::get(LoggerInterface::class)->warning("Storage wrapper '{wrapper}' was not registered via the 'OC_Filesystem - preSetup' hook which could cause potential problems.", [
-				'wrapper' => $wrapperName,
-				'app' => 'filesystem',
-			]);
-		}
-
-		$mounts = self::getMountManager()->getAll();
-		/** @var StorageFactory $loader */
-		$loader = self::getLoader();
-		if (!$loader->addStorageWrapper($wrapperName, $wrapper, $priority, $mounts)) {
-			// do not re-wrap if storage with this name already existed
-			return;
-		}
-	}
-
-	/**
-	 * Returns the storage factory
-	 *
-	 * @return IStorageFactory
-	 */
-	public static function getLoader() {
-		if (!self::$loader) {
-			self::$loader = \OC::$server->get(IStorageFactory::class);
-		}
-		return self::$loader;
-	}
-
-	/**
-	 * Returns the mount manager
-	 */
-	public static function getMountManager(): Mount\Manager {
-		self::initMountManager();
-		assert(self::$mounts !== null);
-		return self::$mounts;
-	}
-
-	/**
-	 * 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 doesn't take the chroot into account )
-	 *
-	 * @param string $path
-	 * @return string
-	 */
-	public static function getMountPoint($path) {
-		if (!self::$mounts) {
-			\OC_Util::setupFS();
-		}
-		$mount = self::$mounts->find($path);
-		return $mount->getMountPoint();
-	}
-
-	/**
-	 * get a list of all mount points in a directory
-	 *
-	 * @param string $path
-	 * @return string[]
-	 */
-	public static function getMountPoints($path) {
-		if (!self::$mounts) {
-			\OC_Util::setupFS();
-		}
-		$result = [];
-		$mounts = self::$mounts->findIn($path);
-		foreach ($mounts as $mount) {
-			$result[] = $mount->getMountPoint();
-		}
-		return $result;
-	}
-
-	/**
-	 * get the storage mounted at $mountPoint
-	 *
-	 * @param string $mountPoint
-	 * @return \OC\Files\Storage\Storage|null
-	 */
-	public static function getStorage($mountPoint) {
-		$mount = self::getMountManager()->find($mountPoint);
-		return $mount->getStorage();
-	}
-
-	/**
-	 * @param string $id
-	 * @return Mount\MountPoint[]
-	 */
-	public static function getMountByStorageId($id) {
-		return self::getMountManager()->findByStorageId($id);
-	}
-
-	/**
-	 * @param int $id
-	 * @return Mount\MountPoint[]
-	 */
-	public static function getMountByNumericId($id) {
-		return self::getMountManager()->findByNumericId($id);
-	}
-
-	/**
-	 * resolve a path to a storage and internal path
-	 *
-	 * @param string $path
-	 * @return array{?\OCP\Files\Storage\IStorage, string} an array consisting of the storage and the internal path
-	 */
-	public static function resolvePath($path): array {
-		$mount = self::getMountManager()->find($path);
-		return [$mount->getStorage(), rtrim($mount->getInternalPath($path), '/')];
-	}
-
-	public static function init(string|IUser|null $user, string $root): bool {
-		if (self::$defaultInstance) {
-			return false;
-		}
-		self::initInternal($root);
-
-		//load custom mount config
-		self::initMountPoints($user);
-
-		return true;
-	}
-
-	public static function initInternal(string $root): bool {
-		if (self::$defaultInstance) {
-			return false;
-		}
-		self::getLoader();
-		self::$defaultInstance = new View($root);
-		/** @var IEventDispatcher $eventDispatcher */
-		$eventDispatcher = \OC::$server->get(IEventDispatcher::class);
-		$eventDispatcher->addListener(FilesystemTornDownEvent::class, function () {
-			self::$defaultInstance = null;
-			self::$loaded = false;
-		});
-
-		self::initMountManager();
-
-		self::$loaded = true;
-
-		return true;
-	}
-
-	public static function initMountManager(): void {
-		if (!self::$mounts) {
-			self::$mounts = \OC::$server->get(IMountManager::class);
-		}
-	}
-
-	/**
-	 * Initialize system and personal mount points for a user
-	 *
-	 * @throws \OC\User\NoUserException if the user is not available
-	 */
-	public static function initMountPoints(string|IUser|null $user = ''): void {
-		/** @var IUserManager $userManager */
-		$userManager = \OC::$server->get(IUserManager::class);
-
-		$userObject = ($user instanceof IUser) ? $user : $userManager->get($user);
-		if ($userObject) {
-			/** @var SetupManager $setupManager */
-			$setupManager = \OC::$server->get(SetupManager::class);
-			$setupManager->setupForUser($userObject);
-		} else {
-			throw new NoUserException();
-		}
-	}
-
-	/**
-	 * Get the default filesystem view
-	 */
-	public static function getView(): ?View {
-		if (!self::$defaultInstance) {
-			/** @var IUserSession $session */
-			$session = \OC::$server->get(IUserSession::class);
-			$user = $session->getUser();
-			if ($user) {
-				$userDir = '/' . $user->getUID() . '/files';
-				self::initInternal($userDir);
-			}
-		}
-		return self::$defaultInstance;
-	}
-
-	/**
-	 * tear down the filesystem, removing all storage providers
-	 */
-	public static function tearDown() {
-		\OC_Util::tearDownFS();
-	}
-
-	/**
-	 * get the relative path of the root data directory for the current user
-	 *
-	 * @return ?string
-	 *
-	 * Returns path like /admin/files
-	 */
-	public static function getRoot() {
-		if (!self::$defaultInstance) {
-			return null;
-		}
-		return self::$defaultInstance->getRoot();
-	}
-
-	/**
-	 * mount an \OC\Files\Storage\Storage in our virtual filesystem
-	 *
-	 * @param \OC\Files\Storage\Storage|string $class
-	 * @param array $arguments
-	 * @param string $mountpoint
-	 */
-	public static function mount($class, $arguments, $mountpoint) {
-		if (!self::$mounts) {
-			\OC_Util::setupFS();
-		}
-		$mount = new Mount\MountPoint($class, $mountpoint, $arguments, self::getLoader());
-		self::$mounts->addMount($mount);
-	}
-
-	/**
-	 * check if the requested path is valid
-	 *
-	 * @param string $path
-	 * @return bool
-	 */
-	public static function isValidPath($path) {
-		$path = self::normalizePath($path);
-		if (!$path || $path[0] !== '/') {
-			$path = '/' . $path;
-		}
-		if (str_contains($path, '/../') || strrchr($path, '/') === '/..') {
-			return false;
-		}
-		return true;
-	}
-
-	/**
-	 * @param string $filename
-	 * @return bool
-	 *
-	 * @deprecated 30.0.0 - use \OC\Files\FilenameValidator::isForbidden
-	 */
-	public static function isFileBlacklisted($filename) {
-		if (self::$validator === null) {
-			self::$validator = \OCP\Server::get(FilenameValidator::class);
-		}
-
-		$filename = self::normalizePath($filename);
-		return self::$validator->isForbidden($filename);
-	}
-
-	/**
-	 * check if the directory should be ignored when scanning
-	 * NOTE: the special directories . and .. would cause never ending recursion
-	 *
-	 * @param string $dir
-	 * @return boolean
-	 */
-	public static function isIgnoredDir($dir) {
-		if ($dir === '.' || $dir === '..') {
-			return true;
-		}
-		return false;
-	}
-
-	/**
-	 * following functions are equivalent to their php builtin equivalents for arguments/return values.
-	 */
-	public static function mkdir($path) {
-		return self::$defaultInstance->mkdir($path);
-	}
-
-	public static function rmdir($path) {
-		return self::$defaultInstance->rmdir($path);
-	}
-
-	public static function is_dir($path) {
-		return self::$defaultInstance->is_dir($path);
-	}
-
-	public static function is_file($path) {
-		return self::$defaultInstance->is_file($path);
-	}
-
-	public static function stat($path) {
-		return self::$defaultInstance->stat($path);
-	}
-
-	public static function filetype($path) {
-		return self::$defaultInstance->filetype($path);
-	}
-
-	public static function filesize($path) {
-		return self::$defaultInstance->filesize($path);
-	}
-
-	public static function readfile($path) {
-		return self::$defaultInstance->readfile($path);
-	}
-
-	public static function isCreatable($path) {
-		return self::$defaultInstance->isCreatable($path);
-	}
-
-	public static function isReadable($path) {
-		return self::$defaultInstance->isReadable($path);
-	}
-
-	public static function isUpdatable($path) {
-		return self::$defaultInstance->isUpdatable($path);
-	}
-
-	public static function isDeletable($path) {
-		return self::$defaultInstance->isDeletable($path);
-	}
-
-	public static function isSharable($path) {
-		return self::$defaultInstance->isSharable($path);
-	}
-
-	public static function file_exists($path) {
-		return self::$defaultInstance->file_exists($path);
-	}
-
-	public static function filemtime($path) {
-		return self::$defaultInstance->filemtime($path);
-	}
-
-	public static function touch($path, $mtime = null) {
-		return self::$defaultInstance->touch($path, $mtime);
-	}
-
-	/**
-	 * @return string|false
-	 */
-	public static function file_get_contents($path) {
-		return self::$defaultInstance->file_get_contents($path);
-	}
-
-	public static function file_put_contents($path, $data) {
-		return self::$defaultInstance->file_put_contents($path, $data);
-	}
-
-	public static function unlink($path) {
-		return self::$defaultInstance->unlink($path);
-	}
-
-	public static function rename($source, $target) {
-		return self::$defaultInstance->rename($source, $target);
-	}
-
-	public static function copy($source, $target) {
-		return self::$defaultInstance->copy($source, $target);
-	}
-
-	public static function fopen($path, $mode) {
-		return self::$defaultInstance->fopen($path, $mode);
-	}
-
-	/**
-	 * @param string $path
-	 * @throws \OCP\Files\InvalidPathException
-	 */
-	public static function toTmpFile($path): string|false {
-		return self::$defaultInstance->toTmpFile($path);
-	}
-
-	public static function fromTmpFile($tmpFile, $path) {
-		return self::$defaultInstance->fromTmpFile($tmpFile, $path);
-	}
-
-	public static function getMimeType($path) {
-		return self::$defaultInstance->getMimeType($path);
-	}
-
-	public static function hash($type, $path, $raw = false) {
-		return self::$defaultInstance->hash($type, $path, $raw);
-	}
-
-	public static function free_space($path = '/') {
-		return self::$defaultInstance->free_space($path);
-	}
-
-	public static function search($query) {
-		return self::$defaultInstance->search($query);
-	}
-
-	/**
-	 * @param string $query
-	 */
-	public static function searchByMime($query) {
-		return self::$defaultInstance->searchByMime($query);
-	}
-
-	/**
-	 * @param string|int $tag name or tag id
-	 * @param string $userId owner of the tags
-	 * @return FileInfo[] array or file info
-	 */
-	public static function searchByTag($tag, $userId) {
-		return self::$defaultInstance->searchByTag($tag, $userId);
-	}
-
-	/**
-	 * check if a file or folder has been updated since $time
-	 *
-	 * @param string $path
-	 * @param int $time
-	 * @return bool
-	 */
-	public static function hasUpdated($path, $time) {
-		return self::$defaultInstance->hasUpdated($path, $time);
-	}
-
-	/**
-	 * Fix common problems with a file path
-	 *
-	 * @param string $path
-	 * @param bool $stripTrailingSlash whether to strip the trailing slash
-	 * @param bool $isAbsolutePath whether the given path is absolute
-	 * @param bool $keepUnicode true to disable unicode normalization
-	 * @psalm-taint-escape file
-	 * @return string
-	 */
-	public static function normalizePath($path, $stripTrailingSlash = true, $isAbsolutePath = false, $keepUnicode = false) {
-		/**
-		 * FIXME: This is a workaround for existing classes and files which call
-		 *        this function with another type than a valid string. This
-		 *        conversion should get removed as soon as all existing
-		 *        function calls have been fixed.
-		 */
-		$path = (string)$path;
-
-		if ($path === '') {
-			return '/';
-		}
-
-		//normalize unicode if possible
-		if (!$keepUnicode) {
-			$path = \OC_Util::normalizeUnicode($path);
-		}
-
-		//add leading slash, if it is already there we strip it anyway
-		$path = '/' . $path;
-
-		$patterns = [
-			'#\\\\#s',       // no windows style '\\' slashes
-			'#/\.(/\.)*/#s', // remove '/./'
-			'#\//+#s',       // remove sequence of slashes
-			'#/\.$#s',       // remove trailing '/.'
-		];
-
-		do {
-			$count = 0;
-			$path = preg_replace($patterns, '/', $path, -1, $count);
-		} while ($count > 0);
-
-		//remove trailing slash
-		if ($stripTrailingSlash && strlen($path) > 1) {
-			$path = rtrim($path, '/');
-		}
-
-		return $path;
-	}
-
-	/**
-	 * get the filesystem info
-	 *
-	 * @param string $path
-	 * @param bool|string $includeMountPoints whether to add mountpoint sizes,
-	 *                                        defaults to true
-	 * @return \OC\Files\FileInfo|false False if file does not exist
-	 */
-	public static function getFileInfo($path, $includeMountPoints = true) {
-		return self::getView()->getFileInfo($path, $includeMountPoints);
-	}
-
-	/**
-	 * change file metadata
-	 *
-	 * @param string $path
-	 * @param array $data
-	 * @return int
-	 *
-	 * returns the fileid of the updated file
-	 */
-	public static function putFileInfo($path, $data) {
-		return self::$defaultInstance->putFileInfo($path, $data);
-	}
-
-	/**
-	 * get the content of a directory
-	 *
-	 * @param string $directory path under datadirectory
-	 * @param string $mimetype_filter limit returned content to this mimetype or mimepart
-	 * @return \OC\Files\FileInfo[]
-	 */
-	public static function getDirectoryContent($directory, $mimetype_filter = '') {
-		return self::$defaultInstance->getDirectoryContent($directory, $mimetype_filter);
-	}
-
-	/**
-	 * Get the path of a file by id
-	 *
-	 * Note that the resulting path is not guaranteed to be unique for the id, multiple paths can point to the same file
-	 *
-	 * @param int $id
-	 * @throws NotFoundException
-	 * @return string
-	 */
-	public static function getPath($id) {
-		return self::$defaultInstance->getPath($id);
-	}
-
-	/**
-	 * Get the owner for a file or folder
-	 *
-	 * @param string $path
-	 * @return string
-	 */
-	public static function getOwner($path) {
-		return self::$defaultInstance->getOwner($path);
-	}
-
-	/**
-	 * get the ETag for a file or folder
-	 */
-	public static function getETag(string $path): string|false {
-		return self::$defaultInstance->getETag($path);
-	}
+    private static ?Mount\Manager $mounts = null;
+
+    public static bool $loaded = false;
+
+    private static ?View $defaultInstance = null;
+
+    private static ?FilenameValidator $validator = null;
+
+    /**
+     * classname which used for hooks handling
+     * used as signalclass in OC_Hooks::emit()
+     */
+    public const CLASSNAME = 'OC_Filesystem';
+
+    /**
+     * signalname emitted before file renaming
+     *
+     * @param string $oldpath
+     * @param string $newpath
+     */
+    public const signal_rename = 'rename';
+
+    /**
+     * signal emitted after file renaming
+     *
+     * @param string $oldpath
+     * @param string $newpath
+     */
+    public const signal_post_rename = 'post_rename';
+
+    /**
+     * signal emitted before file/dir creation
+     *
+     * @param string $path
+     * @param bool $run changing this flag to false in hook handler will cancel event
+     */
+    public const signal_create = 'create';
+
+    /**
+     * signal emitted after file/dir creation
+     *
+     * @param string $path
+     * @param bool $run changing this flag to false in hook handler will cancel event
+     */
+    public const signal_post_create = 'post_create';
+
+    /**
+     * signal emits before file/dir copy
+     *
+     * @param string $oldpath
+     * @param string $newpath
+     * @param bool $run changing this flag to false in hook handler will cancel event
+     */
+    public const signal_copy = 'copy';
+
+    /**
+     * signal emits after file/dir copy
+     *
+     * @param string $oldpath
+     * @param string $newpath
+     */
+    public const signal_post_copy = 'post_copy';
+
+    /**
+     * signal emits before file/dir save
+     *
+     * @param string $path
+     * @param bool $run changing this flag to false in hook handler will cancel event
+     */
+    public const signal_write = 'write';
+
+    /**
+     * signal emits after file/dir save
+     *
+     * @param string $path
+     */
+    public const signal_post_write = 'post_write';
+
+    /**
+     * signal emitted before file/dir update
+     *
+     * @param string $path
+     * @param bool $run changing this flag to false in hook handler will cancel event
+     */
+    public const signal_update = 'update';
+
+    /**
+     * signal emitted after file/dir update
+     *
+     * @param string $path
+     * @param bool $run changing this flag to false in hook handler will cancel event
+     */
+    public const signal_post_update = 'post_update';
+
+    /**
+     * signal emits when reading file/dir
+     *
+     * @param string $path
+     */
+    public const signal_read = 'read';
+
+    /**
+     * signal emits when removing file/dir
+     *
+     * @param string $path
+     */
+    public const signal_delete = 'delete';
+
+    /**
+     * parameters definitions for signals
+     */
+    public const signal_param_path = 'path';
+    public const signal_param_oldpath = 'oldpath';
+    public const signal_param_newpath = 'newpath';
+
+    /**
+     * run - changing this flag to false in hook handler will cancel event
+     */
+    public const signal_param_run = 'run';
+
+    public const signal_create_mount = 'create_mount';
+    public const signal_delete_mount = 'delete_mount';
+    public const signal_param_mount_type = 'mounttype';
+    public const signal_param_users = 'users';
+
+    private static ?\OC\Files\Storage\StorageFactory $loader = null;
+
+    private static bool $logWarningWhenAddingStorageWrapper = true;
+
+    /**
+     * @param bool $shouldLog
+     * @return bool previous value
+     * @internal
+     */
+    public static function logWarningWhenAddingStorageWrapper(bool $shouldLog): bool {
+        $previousValue = self::$logWarningWhenAddingStorageWrapper;
+        self::$logWarningWhenAddingStorageWrapper = $shouldLog;
+        return $previousValue;
+    }
+
+    /**
+     * @param string $wrapperName
+     * @param callable $wrapper
+     * @param int $priority
+     */
+    public static function addStorageWrapper($wrapperName, $wrapper, $priority = 50) {
+        if (self::$logWarningWhenAddingStorageWrapper) {
+            \OCP\Server::get(LoggerInterface::class)->warning("Storage wrapper '{wrapper}' was not registered via the 'OC_Filesystem - preSetup' hook which could cause potential problems.", [
+                'wrapper' => $wrapperName,
+                'app' => 'filesystem',
+            ]);
+        }
+
+        $mounts = self::getMountManager()->getAll();
+        /** @var StorageFactory $loader */
+        $loader = self::getLoader();
+        if (!$loader->addStorageWrapper($wrapperName, $wrapper, $priority, $mounts)) {
+            // do not re-wrap if storage with this name already existed
+            return;
+        }
+    }
+
+    /**
+     * Returns the storage factory
+     *
+     * @return IStorageFactory
+     */
+    public static function getLoader() {
+        if (!self::$loader) {
+            self::$loader = \OC::$server->get(IStorageFactory::class);
+        }
+        return self::$loader;
+    }
+
+    /**
+     * Returns the mount manager
+     */
+    public static function getMountManager(): Mount\Manager {
+        self::initMountManager();
+        assert(self::$mounts !== null);
+        return self::$mounts;
+    }
+
+    /**
+     * 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 doesn't take the chroot into account )
+     *
+     * @param string $path
+     * @return string
+     */
+    public static function getMountPoint($path) {
+        if (!self::$mounts) {
+            \OC_Util::setupFS();
+        }
+        $mount = self::$mounts->find($path);
+        return $mount->getMountPoint();
+    }
+
+    /**
+     * get a list of all mount points in a directory
+     *
+     * @param string $path
+     * @return string[]
+     */
+    public static function getMountPoints($path) {
+        if (!self::$mounts) {
+            \OC_Util::setupFS();
+        }
+        $result = [];
+        $mounts = self::$mounts->findIn($path);
+        foreach ($mounts as $mount) {
+            $result[] = $mount->getMountPoint();
+        }
+        return $result;
+    }
+
+    /**
+     * get the storage mounted at $mountPoint
+     *
+     * @param string $mountPoint
+     * @return \OC\Files\Storage\Storage|null
+     */
+    public static function getStorage($mountPoint) {
+        $mount = self::getMountManager()->find($mountPoint);
+        return $mount->getStorage();
+    }
+
+    /**
+     * @param string $id
+     * @return Mount\MountPoint[]
+     */
+    public static function getMountByStorageId($id) {
+        return self::getMountManager()->findByStorageId($id);
+    }
+
+    /**
+     * @param int $id
+     * @return Mount\MountPoint[]
+     */
+    public static function getMountByNumericId($id) {
+        return self::getMountManager()->findByNumericId($id);
+    }
+
+    /**
+     * resolve a path to a storage and internal path
+     *
+     * @param string $path
+     * @return array{?\OCP\Files\Storage\IStorage, string} an array consisting of the storage and the internal path
+     */
+    public static function resolvePath($path): array {
+        $mount = self::getMountManager()->find($path);
+        return [$mount->getStorage(), rtrim($mount->getInternalPath($path), '/')];
+    }
+
+    public static function init(string|IUser|null $user, string $root): bool {
+        if (self::$defaultInstance) {
+            return false;
+        }
+        self::initInternal($root);
+
+        //load custom mount config
+        self::initMountPoints($user);
+
+        return true;
+    }
+
+    public static function initInternal(string $root): bool {
+        if (self::$defaultInstance) {
+            return false;
+        }
+        self::getLoader();
+        self::$defaultInstance = new View($root);
+        /** @var IEventDispatcher $eventDispatcher */
+        $eventDispatcher = \OC::$server->get(IEventDispatcher::class);
+        $eventDispatcher->addListener(FilesystemTornDownEvent::class, function () {
+            self::$defaultInstance = null;
+            self::$loaded = false;
+        });
+
+        self::initMountManager();
+
+        self::$loaded = true;
+
+        return true;
+    }
+
+    public static function initMountManager(): void {
+        if (!self::$mounts) {
+            self::$mounts = \OC::$server->get(IMountManager::class);
+        }
+    }
+
+    /**
+     * Initialize system and personal mount points for a user
+     *
+     * @throws \OC\User\NoUserException if the user is not available
+     */
+    public static function initMountPoints(string|IUser|null $user = ''): void {
+        /** @var IUserManager $userManager */
+        $userManager = \OC::$server->get(IUserManager::class);
+
+        $userObject = ($user instanceof IUser) ? $user : $userManager->get($user);
+        if ($userObject) {
+            /** @var SetupManager $setupManager */
+            $setupManager = \OC::$server->get(SetupManager::class);
+            $setupManager->setupForUser($userObject);
+        } else {
+            throw new NoUserException();
+        }
+    }
+
+    /**
+     * Get the default filesystem view
+     */
+    public static function getView(): ?View {
+        if (!self::$defaultInstance) {
+            /** @var IUserSession $session */
+            $session = \OC::$server->get(IUserSession::class);
+            $user = $session->getUser();
+            if ($user) {
+                $userDir = '/' . $user->getUID() . '/files';
+                self::initInternal($userDir);
+            }
+        }
+        return self::$defaultInstance;
+    }
+
+    /**
+     * tear down the filesystem, removing all storage providers
+     */
+    public static function tearDown() {
+        \OC_Util::tearDownFS();
+    }
+
+    /**
+     * get the relative path of the root data directory for the current user
+     *
+     * @return ?string
+     *
+     * Returns path like /admin/files
+     */
+    public static function getRoot() {
+        if (!self::$defaultInstance) {
+            return null;
+        }
+        return self::$defaultInstance->getRoot();
+    }
+
+    /**
+     * mount an \OC\Files\Storage\Storage in our virtual filesystem
+     *
+     * @param \OC\Files\Storage\Storage|string $class
+     * @param array $arguments
+     * @param string $mountpoint
+     */
+    public static function mount($class, $arguments, $mountpoint) {
+        if (!self::$mounts) {
+            \OC_Util::setupFS();
+        }
+        $mount = new Mount\MountPoint($class, $mountpoint, $arguments, self::getLoader());
+        self::$mounts->addMount($mount);
+    }
+
+    /**
+     * check if the requested path is valid
+     *
+     * @param string $path
+     * @return bool
+     */
+    public static function isValidPath($path) {
+        $path = self::normalizePath($path);
+        if (!$path || $path[0] !== '/') {
+            $path = '/' . $path;
+        }
+        if (str_contains($path, '/../') || strrchr($path, '/') === '/..') {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * @param string $filename
+     * @return bool
+     *
+     * @deprecated 30.0.0 - use \OC\Files\FilenameValidator::isForbidden
+     */
+    public static function isFileBlacklisted($filename) {
+        if (self::$validator === null) {
+            self::$validator = \OCP\Server::get(FilenameValidator::class);
+        }
+
+        $filename = self::normalizePath($filename);
+        return self::$validator->isForbidden($filename);
+    }
+
+    /**
+     * check if the directory should be ignored when scanning
+     * NOTE: the special directories . and .. would cause never ending recursion
+     *
+     * @param string $dir
+     * @return boolean
+     */
+    public static function isIgnoredDir($dir) {
+        if ($dir === '.' || $dir === '..') {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * following functions are equivalent to their php builtin equivalents for arguments/return values.
+     */
+    public static function mkdir($path) {
+        return self::$defaultInstance->mkdir($path);
+    }
+
+    public static function rmdir($path) {
+        return self::$defaultInstance->rmdir($path);
+    }
+
+    public static function is_dir($path) {
+        return self::$defaultInstance->is_dir($path);
+    }
+
+    public static function is_file($path) {
+        return self::$defaultInstance->is_file($path);
+    }
+
+    public static function stat($path) {
+        return self::$defaultInstance->stat($path);
+    }
+
+    public static function filetype($path) {
+        return self::$defaultInstance->filetype($path);
+    }
+
+    public static function filesize($path) {
+        return self::$defaultInstance->filesize($path);
+    }
+
+    public static function readfile($path) {
+        return self::$defaultInstance->readfile($path);
+    }
+
+    public static function isCreatable($path) {
+        return self::$defaultInstance->isCreatable($path);
+    }
+
+    public static function isReadable($path) {
+        return self::$defaultInstance->isReadable($path);
+    }
+
+    public static function isUpdatable($path) {
+        return self::$defaultInstance->isUpdatable($path);
+    }
+
+    public static function isDeletable($path) {
+        return self::$defaultInstance->isDeletable($path);
+    }
+
+    public static function isSharable($path) {
+        return self::$defaultInstance->isSharable($path);
+    }
+
+    public static function file_exists($path) {
+        return self::$defaultInstance->file_exists($path);
+    }
+
+    public static function filemtime($path) {
+        return self::$defaultInstance->filemtime($path);
+    }
+
+    public static function touch($path, $mtime = null) {
+        return self::$defaultInstance->touch($path, $mtime);
+    }
+
+    /**
+     * @return string|false
+     */
+    public static function file_get_contents($path) {
+        return self::$defaultInstance->file_get_contents($path);
+    }
+
+    public static function file_put_contents($path, $data) {
+        return self::$defaultInstance->file_put_contents($path, $data);
+    }
+
+    public static function unlink($path) {
+        return self::$defaultInstance->unlink($path);
+    }
+
+    public static function rename($source, $target) {
+        return self::$defaultInstance->rename($source, $target);
+    }
+
+    public static function copy($source, $target) {
+        return self::$defaultInstance->copy($source, $target);
+    }
+
+    public static function fopen($path, $mode) {
+        return self::$defaultInstance->fopen($path, $mode);
+    }
+
+    /**
+     * @param string $path
+     * @throws \OCP\Files\InvalidPathException
+     */
+    public static function toTmpFile($path): string|false {
+        return self::$defaultInstance->toTmpFile($path);
+    }
+
+    public static function fromTmpFile($tmpFile, $path) {
+        return self::$defaultInstance->fromTmpFile($tmpFile, $path);
+    }
+
+    public static function getMimeType($path) {
+        return self::$defaultInstance->getMimeType($path);
+    }
+
+    public static function hash($type, $path, $raw = false) {
+        return self::$defaultInstance->hash($type, $path, $raw);
+    }
+
+    public static function free_space($path = '/') {
+        return self::$defaultInstance->free_space($path);
+    }
+
+    public static function search($query) {
+        return self::$defaultInstance->search($query);
+    }
+
+    /**
+     * @param string $query
+     */
+    public static function searchByMime($query) {
+        return self::$defaultInstance->searchByMime($query);
+    }
+
+    /**
+     * @param string|int $tag name or tag id
+     * @param string $userId owner of the tags
+     * @return FileInfo[] array or file info
+     */
+    public static function searchByTag($tag, $userId) {
+        return self::$defaultInstance->searchByTag($tag, $userId);
+    }
+
+    /**
+     * check if a file or folder has been updated since $time
+     *
+     * @param string $path
+     * @param int $time
+     * @return bool
+     */
+    public static function hasUpdated($path, $time) {
+        return self::$defaultInstance->hasUpdated($path, $time);
+    }
+
+    /**
+     * Fix common problems with a file path
+     *
+     * @param string $path
+     * @param bool $stripTrailingSlash whether to strip the trailing slash
+     * @param bool $isAbsolutePath whether the given path is absolute
+     * @param bool $keepUnicode true to disable unicode normalization
+     * @psalm-taint-escape file
+     * @return string
+     */
+    public static function normalizePath($path, $stripTrailingSlash = true, $isAbsolutePath = false, $keepUnicode = false) {
+        /**
+         * FIXME: This is a workaround for existing classes and files which call
+         *        this function with another type than a valid string. This
+         *        conversion should get removed as soon as all existing
+         *        function calls have been fixed.
+         */
+        $path = (string)$path;
+
+        if ($path === '') {
+            return '/';
+        }
+
+        //normalize unicode if possible
+        if (!$keepUnicode) {
+            $path = \OC_Util::normalizeUnicode($path);
+        }
+
+        //add leading slash, if it is already there we strip it anyway
+        $path = '/' . $path;
+
+        $patterns = [
+            '#\\\\#s',       // no windows style '\\' slashes
+            '#/\.(/\.)*/#s', // remove '/./'
+            '#\//+#s',       // remove sequence of slashes
+            '#/\.$#s',       // remove trailing '/.'
+        ];
+
+        do {
+            $count = 0;
+            $path = preg_replace($patterns, '/', $path, -1, $count);
+        } while ($count > 0);
+
+        //remove trailing slash
+        if ($stripTrailingSlash && strlen($path) > 1) {
+            $path = rtrim($path, '/');
+        }
+
+        return $path;
+    }
+
+    /**
+     * get the filesystem info
+     *
+     * @param string $path
+     * @param bool|string $includeMountPoints whether to add mountpoint sizes,
+     *                                        defaults to true
+     * @return \OC\Files\FileInfo|false False if file does not exist
+     */
+    public static function getFileInfo($path, $includeMountPoints = true) {
+        return self::getView()->getFileInfo($path, $includeMountPoints);
+    }
+
+    /**
+     * change file metadata
+     *
+     * @param string $path
+     * @param array $data
+     * @return int
+     *
+     * returns the fileid of the updated file
+     */
+    public static function putFileInfo($path, $data) {
+        return self::$defaultInstance->putFileInfo($path, $data);
+    }
+
+    /**
+     * get the content of a directory
+     *
+     * @param string $directory path under datadirectory
+     * @param string $mimetype_filter limit returned content to this mimetype or mimepart
+     * @return \OC\Files\FileInfo[]
+     */
+    public static function getDirectoryContent($directory, $mimetype_filter = '') {
+        return self::$defaultInstance->getDirectoryContent($directory, $mimetype_filter);
+    }
+
+    /**
+     * Get the path of a file by id
+     *
+     * Note that the resulting path is not guaranteed to be unique for the id, multiple paths can point to the same file
+     *
+     * @param int $id
+     * @throws NotFoundException
+     * @return string
+     */
+    public static function getPath($id) {
+        return self::$defaultInstance->getPath($id);
+    }
+
+    /**
+     * Get the owner for a file or folder
+     *
+     * @param string $path
+     * @return string
+     */
+    public static function getOwner($path) {
+        return self::$defaultInstance->getOwner($path);
+    }
+
+    /**
+     * get the ETag for a file or folder
+     */
+    public static function getETag(string $path): string|false {
+        return self::$defaultInstance->getETag($path);
+    }
 }