nextcloud / server

apps/files_sharing/lib/SharedStorage.php

Indentation +515 added lines, -515 removed lines

@@ -45,519 +45,519 @@
  * Convert target path to source path and pass the function call to the correct storage provider
  */
 class SharedStorage extends Jail implements LegacyISharedStorage, ISharedStorage, IDisableEncryptionStorage {
-	/** @var IShare */
-	private $superShare;
-
-	/** @var IShare[] */
-	private $groupedShares;
-
-	/**
-	 * @var View
-	 */
-	private $ownerView;
-
-	private $initialized = false;
-
-	/**
-	 * @var ICacheEntry
-	 */
-	private $sourceRootInfo;
-
-	/** @var string */
-	private $user;
-
-	private LoggerInterface $logger;
-
-	/** @var IStorage */
-	private $nonMaskedStorage;
-
-	private array $mountOptions = [];
-
-	/** @var boolean */
-	private $sharingDisabledForUser;
-
-	/** @var ?Folder $ownerUserFolder */
-	private $ownerUserFolder = null;
-
-	private string $sourcePath = '';
-
-	private static int $initDepth = 0;
-
-	/**
-	 * @psalm-suppress NonInvariantDocblockPropertyType
-	 * @var ?Storage $storage
-	 */
-	protected $storage;
-
-	public function __construct(array $parameters) {
-		$this->ownerView = $parameters['ownerView'];
-		$this->logger = Server::get(LoggerInterface::class);
-
-		$this->superShare = $parameters['superShare'];
-		$this->groupedShares = $parameters['groupedShares'];
-
-		$this->user = $parameters['user'];
-		if (isset($parameters['sharingDisabledForUser'])) {
-			$this->sharingDisabledForUser = $parameters['sharingDisabledForUser'];
-		} else {
-			$this->sharingDisabledForUser = false;
-		}
-
-		parent::__construct([
-			'storage' => null,
-			'root' => null,
-		]);
-	}
-
-	/**
-	 * @return ICacheEntry
-	 */
-	private function getSourceRootInfo() {
-		if (is_null($this->sourceRootInfo)) {
-			if (is_null($this->superShare->getNodeCacheEntry())) {
-				$this->init();
-				$this->sourceRootInfo = $this->nonMaskedStorage->getCache()->get($this->rootPath);
-			} else {
-				$this->sourceRootInfo = $this->superShare->getNodeCacheEntry();
-			}
-		}
-		return $this->sourceRootInfo;
-	}
-
-	/**
-	 * @psalm-assert Storage $this->storage
-	 */
-	private function init() {
-		if ($this->initialized) {
-			if (!$this->storage) {
-				// marked as initialized but no storage set
-				// this is probably because some code path has caused recursion during the share setup
-				// we setup a "failed storage" so `getWrapperStorage` doesn't return null.
-				// If the share setup completes after this the "failed storage" will be overwritten by the correct one
-				$this->logger->warning('Possible share setup recursion detected');
-				$this->storage = new FailedStorage(['exception' => new \Exception('Possible share setup recursion detected')]);
-				$this->cache = new FailedCache();
-				$this->rootPath = '';
-			}
-			return;
-		}
-
-		$this->initialized = true;
-		self::$initDepth++;
-
-		try {
-			if (self::$initDepth > 10) {
-				throw new \Exception('Maximum share depth reached');
-			}
-
-			/** @var IRootFolder $rootFolder */
-			$rootFolder = Server::get(IRootFolder::class);
-			$this->ownerUserFolder = $rootFolder->getUserFolder($this->superShare->getShareOwner());
-			$sourceId = $this->superShare->getNodeId();
-			$ownerNodes = $this->ownerUserFolder->getById($sourceId);
-
-			if (count($ownerNodes) === 0) {
-				$this->storage = new FailedStorage(['exception' => new NotFoundException("File by id $sourceId not found")]);
-				$this->cache = new FailedCache();
-				$this->rootPath = '';
-			} else {
-				foreach ($ownerNodes as $ownerNode) {
-					$nonMaskedStorage = $ownerNode->getStorage();
-
-					// check if potential source node would lead to a recursive share setup
-					if ($nonMaskedStorage instanceof Wrapper && $nonMaskedStorage->isWrapperOf($this)) {
-						continue;
-					}
-					$this->nonMaskedStorage = $nonMaskedStorage;
-					$this->sourcePath = $ownerNode->getPath();
-					$this->rootPath = $ownerNode->getInternalPath();
-					$this->cache = null;
-					break;
-				}
-				if (!$this->nonMaskedStorage) {
-					// all potential source nodes would have been recursive
-					throw new \Exception('recursive share detected');
-				}
-				$this->storage = new PermissionsMask([
-					'storage' => $this->nonMaskedStorage,
-					'mask' => $this->superShare->getPermissions(),
-				]);
-			}
-		} catch (NotFoundException $e) {
-			// original file not accessible or deleted, set FailedStorage
-			$this->storage = new FailedStorage(['exception' => $e]);
-			$this->cache = new FailedCache();
-			$this->rootPath = '';
-		} catch (NoUserException $e) {
-			// sharer user deleted, set FailedStorage
-			$this->storage = new FailedStorage(['exception' => $e]);
-			$this->cache = new FailedCache();
-			$this->rootPath = '';
-		} catch (\Exception $e) {
-			$this->storage = new FailedStorage(['exception' => $e]);
-			$this->cache = new FailedCache();
-			$this->rootPath = '';
-			$this->logger->error($e->getMessage(), ['exception' => $e]);
-		}
-
-		if (!$this->nonMaskedStorage) {
-			$this->nonMaskedStorage = $this->storage;
-		}
-		self::$initDepth--;
-	}
-
-	public function instanceOfStorage(string $class): bool {
-		if ($class === '\OC\Files\Storage\Common' || $class == Common::class) {
-			return true;
-		}
-		if (in_array($class, [
-			'\OC\Files\Storage\Home',
-			'\OC\Files\ObjectStore\HomeObjectStoreStorage',
-			'\OCP\Files\IHomeStorage',
-			Home::class,
-			HomeObjectStoreStorage::class,
-			IHomeStorage::class
-		])) {
-			return false;
-		}
-		return parent::instanceOfStorage($class);
-	}
-
-	/**
-	 * @return string
-	 */
-	public function getShareId() {
-		return $this->superShare->getId();
-	}
-
-	private function isValid(): bool {
-		return $this->getSourceRootInfo() && ($this->getSourceRootInfo()->getPermissions() & Constants::PERMISSION_SHARE) === Constants::PERMISSION_SHARE;
-	}
-
-	public function getId(): string {
-		return 'shared::' . $this->getMountPoint();
-	}
-
-	public function getPermissions(string $path = ''): int {
-		if (!$this->isValid()) {
-			return 0;
-		}
-		$permissions = parent::getPermissions($path) & $this->superShare->getPermissions();
-
-		// part files and the mount point always have delete permissions
-		if ($path === '' || pathinfo($path, PATHINFO_EXTENSION) === 'part') {
-			$permissions |= Constants::PERMISSION_DELETE;
-		}
-
-		if ($this->sharingDisabledForUser) {
-			$permissions &= ~Constants::PERMISSION_SHARE;
-		}
-
-		return $permissions;
-	}
-
-	public function isCreatable(string $path): bool {
-		return (bool)($this->getPermissions($path) & Constants::PERMISSION_CREATE);
-	}
-
-	public function isReadable(string $path): bool {
-		if (!$this->isValid()) {
-			return false;
-		}
-		if (!$this->file_exists($path)) {
-			return false;
-		}
-		/** @var IStorage $storage */
-		/** @var string $internalPath */
-		[$storage, $internalPath] = $this->resolvePath($path);
-		return $storage->isReadable($internalPath);
-	}
-
-	public function isUpdatable(string $path): bool {
-		return (bool)($this->getPermissions($path) & Constants::PERMISSION_UPDATE);
-	}
-
-	public function isDeletable(string $path): bool {
-		return (bool)($this->getPermissions($path) & Constants::PERMISSION_DELETE);
-	}
-
-	public function isSharable(string $path): bool {
-		if (Util::isSharingDisabledForUser() || !Share::isResharingAllowed()) {
-			return false;
-		}
-		return (bool)($this->getPermissions($path) & Constants::PERMISSION_SHARE);
-	}
-
-	public function fopen(string $path, string $mode) {
-		$source = $this->getUnjailedPath($path);
-		switch ($mode) {
-			case 'r+':
-			case 'rb+':
-			case 'w+':
-			case 'wb+':
-			case 'x+':
-			case 'xb+':
-			case 'a+':
-			case 'ab+':
-			case 'w':
-			case 'wb':
-			case 'x':
-			case 'xb':
-			case 'a':
-			case 'ab':
-				$creatable = $this->isCreatable(dirname($path));
-				$updatable = $this->isUpdatable($path);
-				// if neither permissions given, no need to continue
-				if (!$creatable && !$updatable) {
-					if (pathinfo($path, PATHINFO_EXTENSION) === 'part') {
-						$updatable = $this->isUpdatable(dirname($path));
-					}
-
-					if (!$updatable) {
-						return false;
-					}
-				}
-
-				$exists = $this->file_exists($path);
-				// if a file exists, updatable permissions are required
-				if ($exists && !$updatable) {
-					return false;
-				}
-
-				// part file is allowed if !$creatable but the final file is $updatable
-				if (pathinfo($path, PATHINFO_EXTENSION) !== 'part') {
-					if (!$exists && !$creatable) {
-						return false;
-					}
-				}
-		}
-		$info = [
-			'target' => $this->getMountPoint() . '/' . $path,
-			'source' => $source,
-			'mode' => $mode,
-		];
-		Util::emitHook('\OC\Files\Storage\Shared', 'fopen', $info);
-		return $this->nonMaskedStorage->fopen($this->getUnjailedPath($path), $mode);
-	}
-
-	public function rename(string $source, string $target): bool {
-		$this->init();
-		$isPartFile = pathinfo($source, PATHINFO_EXTENSION) === 'part';
-		$targetExists = $this->file_exists($target);
-		$sameFolder = dirname($source) === dirname($target);
-
-		if ($targetExists || ($sameFolder && !$isPartFile)) {
-			if (!$this->isUpdatable('')) {
-				return false;
-			}
-		} else {
-			if (!$this->isCreatable('')) {
-				return false;
-			}
-		}
-
-		return $this->nonMaskedStorage->rename($this->getUnjailedPath($source), $this->getUnjailedPath($target));
-	}
-
-	/**
-	 * return mount point of share, relative to data/user/files
-	 *
-	 * @return string
-	 */
-	public function getMountPoint(): string {
-		return $this->superShare->getTarget();
-	}
-
-	public function setMountPoint(string $path): void {
-		$this->superShare->setTarget($path);
-
-		foreach ($this->groupedShares as $share) {
-			$share->setTarget($path);
-		}
-	}
-
-	/**
-	 * get the user who shared the file
-	 *
-	 * @return string
-	 */
-	public function getSharedFrom(): string {
-		return $this->superShare->getShareOwner();
-	}
-
-	public function getShare(): IShare {
-		return $this->superShare;
-	}
-
-	/**
-	 * return share type, can be "file" or "folder"
-	 *
-	 * @return string
-	 */
-	public function getItemType(): string {
-		return $this->superShare->getNodeType();
-	}
-
-	public function getCache(string $path = '', ?IStorage $storage = null): ICache {
-		if ($this->cache) {
-			return $this->cache;
-		}
-		if (!$storage) {
-			$storage = $this;
-		}
-		$sourceRoot = $this->getSourceRootInfo();
-		if ($this->storage instanceof FailedStorage) {
-			return new FailedCache();
-		}
-
-		$this->cache = new Cache(
-			$storage,
-			$sourceRoot,
-			Server::get(CacheDependencies::class),
-			$this->getShare()
-		);
-		return $this->cache;
-	}
-
-	public function getScanner(string $path = '', ?IStorage $storage = null): IScanner {
-		if (!$storage) {
-			$storage = $this;
-		}
-		return new Scanner($storage);
-	}
-
-	public function getOwner(string $path): string|false {
-		return $this->superShare->getShareOwner();
-	}
-
-	public function getWatcher(string $path = '', ?IStorage $storage = null): IWatcher {
-		if ($this->watcher) {
-			return $this->watcher;
-		}
-
-		// Get node information
-		$node = $this->getShare()->getNodeCacheEntry();
-		if ($node instanceof CacheEntry) {
-			$storageId = $node->getData()['storage_string_id'] ?? null;
-			// for shares from the home storage we can rely on the home storage to keep itself up to date
-			// for other storages we need use the proper watcher
-			if ($storageId !== null && !(str_starts_with($storageId, 'home::') || str_starts_with($storageId, 'object::user'))) {
-				$cache = $this->getCache();
-				$this->watcher = parent::getWatcher($path, $storage);
-				if ($cache instanceof Cache) {
-					$this->watcher->onUpdate($cache->markRootChanged(...));
-				}
-				return $this->watcher;
-			}
-		}
-
-		// cache updating is handled by the share source
-		$this->watcher = new NullWatcher();
-		return $this->watcher;
-	}
-
-	/**
-	 * unshare complete storage, also the grouped shares
-	 *
-	 * @return bool
-	 */
-	public function unshareStorage(): bool {
-		foreach ($this->groupedShares as $share) {
-			Server::get(\OCP\Share\IManager::class)->deleteFromSelf($share, $this->user);
-		}
-		return true;
-	}
-
-	public function acquireLock(string $path, int $type, ILockingProvider $provider): void {
-		/** @var ILockingStorage $targetStorage */
-		[$targetStorage, $targetInternalPath] = $this->resolvePath($path);
-		$targetStorage->acquireLock($targetInternalPath, $type, $provider);
-		// lock the parent folders of the owner when locking the share as recipient
-		if ($path === '') {
-			$sourcePath = $this->ownerUserFolder->getRelativePath($this->sourcePath);
-			$this->ownerView->lockFile(dirname($sourcePath), ILockingProvider::LOCK_SHARED, true);
-		}
-	}
-
-	public function releaseLock(string $path, int $type, ILockingProvider $provider): void {
-		/** @var ILockingStorage $targetStorage */
-		[$targetStorage, $targetInternalPath] = $this->resolvePath($path);
-		$targetStorage->releaseLock($targetInternalPath, $type, $provider);
-		// unlock the parent folders of the owner when unlocking the share as recipient
-		if ($path === '') {
-			$sourcePath = $this->ownerUserFolder->getRelativePath($this->sourcePath);
-			$this->ownerView->unlockFile(dirname($sourcePath), ILockingProvider::LOCK_SHARED, true);
-		}
-	}
-
-	public function changeLock(string $path, int $type, ILockingProvider $provider): void {
-		/** @var ILockingStorage $targetStorage */
-		[$targetStorage, $targetInternalPath] = $this->resolvePath($path);
-		$targetStorage->changeLock($targetInternalPath, $type, $provider);
-	}
-
-	public function getAvailability(): array {
-		// shares do not participate in availability logic
-		return [
-			'available' => true,
-			'last_checked' => 0,
-		];
-	}
-
-	public function setAvailability(bool $isAvailable): void {
-		// shares do not participate in availability logic
-	}
-
-	public function getSourceStorage() {
-		$this->init();
-		return $this->nonMaskedStorage;
-	}
-
-	public function getWrapperStorage(): Storage {
-		$this->init();
-
-		/**
-		 * @psalm-suppress DocblockTypeContradiction
-		 */
-		if (!$this->storage) {
-			$message = 'no storage set after init for share ' . $this->getShareId();
-			$this->logger->error($message);
-			$this->storage = new FailedStorage(['exception' => new \Exception($message)]);
-		}
-
-		return $this->storage;
-	}
-
-	public function file_get_contents(string $path): string|false {
-		$info = [
-			'target' => $this->getMountPoint() . '/' . $path,
-			'source' => $this->getUnjailedPath($path),
-		];
-		Util::emitHook('\OC\Files\Storage\Shared', 'file_get_contents', $info);
-		return parent::file_get_contents($path);
-	}
-
-	public function file_put_contents(string $path, mixed $data): int|float|false {
-		$info = [
-			'target' => $this->getMountPoint() . '/' . $path,
-			'source' => $this->getUnjailedPath($path),
-		];
-		Util::emitHook('\OC\Files\Storage\Shared', 'file_put_contents', $info);
-		return parent::file_put_contents($path, $data);
-	}
-
-	public function setMountOptions(array $options): void {
-		/* Note: This value is never read */
-		$this->mountOptions = $options;
-	}
-
-	public function getUnjailedPath(string $path): string {
-		$this->init();
-		return parent::getUnjailedPath($path);
-	}
-
-	public function getDirectDownload(string $path): array|false {
-		// disable direct download for shares
-		return [];
-	}
+    /** @var IShare */
+    private $superShare;
+
+    /** @var IShare[] */
+    private $groupedShares;
+
+    /**
+     * @var View
+     */
+    private $ownerView;
+
+    private $initialized = false;
+
+    /**
+     * @var ICacheEntry
+     */
+    private $sourceRootInfo;
+
+    /** @var string */
+    private $user;
+
+    private LoggerInterface $logger;
+
+    /** @var IStorage */
+    private $nonMaskedStorage;
+
+    private array $mountOptions = [];
+
+    /** @var boolean */
+    private $sharingDisabledForUser;
+
+    /** @var ?Folder $ownerUserFolder */
+    private $ownerUserFolder = null;
+
+    private string $sourcePath = '';
+
+    private static int $initDepth = 0;
+
+    /**
+     * @psalm-suppress NonInvariantDocblockPropertyType
+     * @var ?Storage $storage
+     */
+    protected $storage;
+
+    public function __construct(array $parameters) {
+        $this->ownerView = $parameters['ownerView'];
+        $this->logger = Server::get(LoggerInterface::class);
+
+        $this->superShare = $parameters['superShare'];
+        $this->groupedShares = $parameters['groupedShares'];
+
+        $this->user = $parameters['user'];
+        if (isset($parameters['sharingDisabledForUser'])) {
+            $this->sharingDisabledForUser = $parameters['sharingDisabledForUser'];
+        } else {
+            $this->sharingDisabledForUser = false;
+        }
+
+        parent::__construct([
+            'storage' => null,
+            'root' => null,
+        ]);
+    }
+
+    /**
+     * @return ICacheEntry
+     */
+    private function getSourceRootInfo() {
+        if (is_null($this->sourceRootInfo)) {
+            if (is_null($this->superShare->getNodeCacheEntry())) {
+                $this->init();
+                $this->sourceRootInfo = $this->nonMaskedStorage->getCache()->get($this->rootPath);
+            } else {
+                $this->sourceRootInfo = $this->superShare->getNodeCacheEntry();
+            }
+        }
+        return $this->sourceRootInfo;
+    }
+
+    /**
+     * @psalm-assert Storage $this->storage
+     */
+    private function init() {
+        if ($this->initialized) {
+            if (!$this->storage) {
+                // marked as initialized but no storage set
+                // this is probably because some code path has caused recursion during the share setup
+                // we setup a "failed storage" so `getWrapperStorage` doesn't return null.
+                // If the share setup completes after this the "failed storage" will be overwritten by the correct one
+                $this->logger->warning('Possible share setup recursion detected');
+                $this->storage = new FailedStorage(['exception' => new \Exception('Possible share setup recursion detected')]);
+                $this->cache = new FailedCache();
+                $this->rootPath = '';
+            }
+            return;
+        }
+
+        $this->initialized = true;
+        self::$initDepth++;
+
+        try {
+            if (self::$initDepth > 10) {
+                throw new \Exception('Maximum share depth reached');
+            }
+
+            /** @var IRootFolder $rootFolder */
+            $rootFolder = Server::get(IRootFolder::class);
+            $this->ownerUserFolder = $rootFolder->getUserFolder($this->superShare->getShareOwner());
+            $sourceId = $this->superShare->getNodeId();
+            $ownerNodes = $this->ownerUserFolder->getById($sourceId);
+
+            if (count($ownerNodes) === 0) {
+                $this->storage = new FailedStorage(['exception' => new NotFoundException("File by id $sourceId not found")]);
+                $this->cache = new FailedCache();
+                $this->rootPath = '';
+            } else {
+                foreach ($ownerNodes as $ownerNode) {
+                    $nonMaskedStorage = $ownerNode->getStorage();
+
+                    // check if potential source node would lead to a recursive share setup
+                    if ($nonMaskedStorage instanceof Wrapper && $nonMaskedStorage->isWrapperOf($this)) {
+                        continue;
+                    }
+                    $this->nonMaskedStorage = $nonMaskedStorage;
+                    $this->sourcePath = $ownerNode->getPath();
+                    $this->rootPath = $ownerNode->getInternalPath();
+                    $this->cache = null;
+                    break;
+                }
+                if (!$this->nonMaskedStorage) {
+                    // all potential source nodes would have been recursive
+                    throw new \Exception('recursive share detected');
+                }
+                $this->storage = new PermissionsMask([
+                    'storage' => $this->nonMaskedStorage,
+                    'mask' => $this->superShare->getPermissions(),
+                ]);
+            }
+        } catch (NotFoundException $e) {
+            // original file not accessible or deleted, set FailedStorage
+            $this->storage = new FailedStorage(['exception' => $e]);
+            $this->cache = new FailedCache();
+            $this->rootPath = '';
+        } catch (NoUserException $e) {
+            // sharer user deleted, set FailedStorage
+            $this->storage = new FailedStorage(['exception' => $e]);
+            $this->cache = new FailedCache();
+            $this->rootPath = '';
+        } catch (\Exception $e) {
+            $this->storage = new FailedStorage(['exception' => $e]);
+            $this->cache = new FailedCache();
+            $this->rootPath = '';
+            $this->logger->error($e->getMessage(), ['exception' => $e]);
+        }
+
+        if (!$this->nonMaskedStorage) {
+            $this->nonMaskedStorage = $this->storage;
+        }
+        self::$initDepth--;
+    }
+
+    public function instanceOfStorage(string $class): bool {
+        if ($class === '\OC\Files\Storage\Common' || $class == Common::class) {
+            return true;
+        }
+        if (in_array($class, [
+            '\OC\Files\Storage\Home',
+            '\OC\Files\ObjectStore\HomeObjectStoreStorage',
+            '\OCP\Files\IHomeStorage',
+            Home::class,
+            HomeObjectStoreStorage::class,
+            IHomeStorage::class
+        ])) {
+            return false;
+        }
+        return parent::instanceOfStorage($class);
+    }
+
+    /**
+     * @return string
+     */
+    public function getShareId() {
+        return $this->superShare->getId();
+    }
+
+    private function isValid(): bool {
+        return $this->getSourceRootInfo() && ($this->getSourceRootInfo()->getPermissions() & Constants::PERMISSION_SHARE) === Constants::PERMISSION_SHARE;
+    }
+
+    public function getId(): string {
+        return 'shared::' . $this->getMountPoint();
+    }
+
+    public function getPermissions(string $path = ''): int {
+        if (!$this->isValid()) {
+            return 0;
+        }
+        $permissions = parent::getPermissions($path) & $this->superShare->getPermissions();
+
+        // part files and the mount point always have delete permissions
+        if ($path === '' || pathinfo($path, PATHINFO_EXTENSION) === 'part') {
+            $permissions |= Constants::PERMISSION_DELETE;
+        }
+
+        if ($this->sharingDisabledForUser) {
+            $permissions &= ~Constants::PERMISSION_SHARE;
+        }
+
+        return $permissions;
+    }
+
+    public function isCreatable(string $path): bool {
+        return (bool)($this->getPermissions($path) & Constants::PERMISSION_CREATE);
+    }
+
+    public function isReadable(string $path): bool {
+        if (!$this->isValid()) {
+            return false;
+        }
+        if (!$this->file_exists($path)) {
+            return false;
+        }
+        /** @var IStorage $storage */
+        /** @var string $internalPath */
+        [$storage, $internalPath] = $this->resolvePath($path);
+        return $storage->isReadable($internalPath);
+    }
+
+    public function isUpdatable(string $path): bool {
+        return (bool)($this->getPermissions($path) & Constants::PERMISSION_UPDATE);
+    }
+
+    public function isDeletable(string $path): bool {
+        return (bool)($this->getPermissions($path) & Constants::PERMISSION_DELETE);
+    }
+
+    public function isSharable(string $path): bool {
+        if (Util::isSharingDisabledForUser() || !Share::isResharingAllowed()) {
+            return false;
+        }
+        return (bool)($this->getPermissions($path) & Constants::PERMISSION_SHARE);
+    }
+
+    public function fopen(string $path, string $mode) {
+        $source = $this->getUnjailedPath($path);
+        switch ($mode) {
+            case 'r+':
+            case 'rb+':
+            case 'w+':
+            case 'wb+':
+            case 'x+':
+            case 'xb+':
+            case 'a+':
+            case 'ab+':
+            case 'w':
+            case 'wb':
+            case 'x':
+            case 'xb':
+            case 'a':
+            case 'ab':
+                $creatable = $this->isCreatable(dirname($path));
+                $updatable = $this->isUpdatable($path);
+                // if neither permissions given, no need to continue
+                if (!$creatable && !$updatable) {
+                    if (pathinfo($path, PATHINFO_EXTENSION) === 'part') {
+                        $updatable = $this->isUpdatable(dirname($path));
+                    }
+
+                    if (!$updatable) {
+                        return false;
+                    }
+                }
+
+                $exists = $this->file_exists($path);
+                // if a file exists, updatable permissions are required
+                if ($exists && !$updatable) {
+                    return false;
+                }
+
+                // part file is allowed if !$creatable but the final file is $updatable
+                if (pathinfo($path, PATHINFO_EXTENSION) !== 'part') {
+                    if (!$exists && !$creatable) {
+                        return false;
+                    }
+                }
+        }
+        $info = [
+            'target' => $this->getMountPoint() . '/' . $path,
+            'source' => $source,
+            'mode' => $mode,
+        ];
+        Util::emitHook('\OC\Files\Storage\Shared', 'fopen', $info);
+        return $this->nonMaskedStorage->fopen($this->getUnjailedPath($path), $mode);
+    }
+
+    public function rename(string $source, string $target): bool {
+        $this->init();
+        $isPartFile = pathinfo($source, PATHINFO_EXTENSION) === 'part';
+        $targetExists = $this->file_exists($target);
+        $sameFolder = dirname($source) === dirname($target);
+
+        if ($targetExists || ($sameFolder && !$isPartFile)) {
+            if (!$this->isUpdatable('')) {
+                return false;
+            }
+        } else {
+            if (!$this->isCreatable('')) {
+                return false;
+            }
+        }
+
+        return $this->nonMaskedStorage->rename($this->getUnjailedPath($source), $this->getUnjailedPath($target));
+    }
+
+    /**
+     * return mount point of share, relative to data/user/files
+     *
+     * @return string
+     */
+    public function getMountPoint(): string {
+        return $this->superShare->getTarget();
+    }
+
+    public function setMountPoint(string $path): void {
+        $this->superShare->setTarget($path);
+
+        foreach ($this->groupedShares as $share) {
+            $share->setTarget($path);
+        }
+    }
+
+    /**
+     * get the user who shared the file
+     *
+     * @return string
+     */
+    public function getSharedFrom(): string {
+        return $this->superShare->getShareOwner();
+    }
+
+    public function getShare(): IShare {
+        return $this->superShare;
+    }
+
+    /**
+     * return share type, can be "file" or "folder"
+     *
+     * @return string
+     */
+    public function getItemType(): string {
+        return $this->superShare->getNodeType();
+    }
+
+    public function getCache(string $path = '', ?IStorage $storage = null): ICache {
+        if ($this->cache) {
+            return $this->cache;
+        }
+        if (!$storage) {
+            $storage = $this;
+        }
+        $sourceRoot = $this->getSourceRootInfo();
+        if ($this->storage instanceof FailedStorage) {
+            return new FailedCache();
+        }
+
+        $this->cache = new Cache(
+            $storage,
+            $sourceRoot,
+            Server::get(CacheDependencies::class),
+            $this->getShare()
+        );
+        return $this->cache;
+    }
+
+    public function getScanner(string $path = '', ?IStorage $storage = null): IScanner {
+        if (!$storage) {
+            $storage = $this;
+        }
+        return new Scanner($storage);
+    }
+
+    public function getOwner(string $path): string|false {
+        return $this->superShare->getShareOwner();
+    }
+
+    public function getWatcher(string $path = '', ?IStorage $storage = null): IWatcher {
+        if ($this->watcher) {
+            return $this->watcher;
+        }
+
+        // Get node information
+        $node = $this->getShare()->getNodeCacheEntry();
+        if ($node instanceof CacheEntry) {
+            $storageId = $node->getData()['storage_string_id'] ?? null;
+            // for shares from the home storage we can rely on the home storage to keep itself up to date
+            // for other storages we need use the proper watcher
+            if ($storageId !== null && !(str_starts_with($storageId, 'home::') || str_starts_with($storageId, 'object::user'))) {
+                $cache = $this->getCache();
+                $this->watcher = parent::getWatcher($path, $storage);
+                if ($cache instanceof Cache) {
+                    $this->watcher->onUpdate($cache->markRootChanged(...));
+                }
+                return $this->watcher;
+            }
+        }
+
+        // cache updating is handled by the share source
+        $this->watcher = new NullWatcher();
+        return $this->watcher;
+    }
+
+    /**
+     * unshare complete storage, also the grouped shares
+     *
+     * @return bool
+     */
+    public function unshareStorage(): bool {
+        foreach ($this->groupedShares as $share) {
+            Server::get(\OCP\Share\IManager::class)->deleteFromSelf($share, $this->user);
+        }
+        return true;
+    }
+
+    public function acquireLock(string $path, int $type, ILockingProvider $provider): void {
+        /** @var ILockingStorage $targetStorage */
+        [$targetStorage, $targetInternalPath] = $this->resolvePath($path);
+        $targetStorage->acquireLock($targetInternalPath, $type, $provider);
+        // lock the parent folders of the owner when locking the share as recipient
+        if ($path === '') {
+            $sourcePath = $this->ownerUserFolder->getRelativePath($this->sourcePath);
+            $this->ownerView->lockFile(dirname($sourcePath), ILockingProvider::LOCK_SHARED, true);
+        }
+    }
+
+    public function releaseLock(string $path, int $type, ILockingProvider $provider): void {
+        /** @var ILockingStorage $targetStorage */
+        [$targetStorage, $targetInternalPath] = $this->resolvePath($path);
+        $targetStorage->releaseLock($targetInternalPath, $type, $provider);
+        // unlock the parent folders of the owner when unlocking the share as recipient
+        if ($path === '') {
+            $sourcePath = $this->ownerUserFolder->getRelativePath($this->sourcePath);
+            $this->ownerView->unlockFile(dirname($sourcePath), ILockingProvider::LOCK_SHARED, true);
+        }
+    }
+
+    public function changeLock(string $path, int $type, ILockingProvider $provider): void {
+        /** @var ILockingStorage $targetStorage */
+        [$targetStorage, $targetInternalPath] = $this->resolvePath($path);
+        $targetStorage->changeLock($targetInternalPath, $type, $provider);
+    }
+
+    public function getAvailability(): array {
+        // shares do not participate in availability logic
+        return [
+            'available' => true,
+            'last_checked' => 0,
+        ];
+    }
+
+    public function setAvailability(bool $isAvailable): void {
+        // shares do not participate in availability logic
+    }
+
+    public function getSourceStorage() {
+        $this->init();
+        return $this->nonMaskedStorage;
+    }
+
+    public function getWrapperStorage(): Storage {
+        $this->init();
+
+        /**
+         * @psalm-suppress DocblockTypeContradiction
+         */
+        if (!$this->storage) {
+            $message = 'no storage set after init for share ' . $this->getShareId();
+            $this->logger->error($message);
+            $this->storage = new FailedStorage(['exception' => new \Exception($message)]);
+        }
+
+        return $this->storage;
+    }
+
+    public function file_get_contents(string $path): string|false {
+        $info = [
+            'target' => $this->getMountPoint() . '/' . $path,
+            'source' => $this->getUnjailedPath($path),
+        ];
+        Util::emitHook('\OC\Files\Storage\Shared', 'file_get_contents', $info);
+        return parent::file_get_contents($path);
+    }
+
+    public function file_put_contents(string $path, mixed $data): int|float|false {
+        $info = [
+            'target' => $this->getMountPoint() . '/' . $path,
+            'source' => $this->getUnjailedPath($path),
+        ];
+        Util::emitHook('\OC\Files\Storage\Shared', 'file_put_contents', $info);
+        return parent::file_put_contents($path, $data);
+    }
+
+    public function setMountOptions(array $options): void {
+        /* Note: This value is never read */
+        $this->mountOptions = $options;
+    }
+
+    public function getUnjailedPath(string $path): string {
+        $this->init();
+        return parent::getUnjailedPath($path);
+    }
+
+    public function getDirectDownload(string $path): array|false {
+        // disable direct download for shares
+        return [];
+    }
 }

Spacing +13 added lines, -13 removed lines

@@ -235,7 +235,7 @@ 
 	}
 
 	public function getId(): string {
-		return 'shared::' . $this->getMountPoint();
+		return 'shared::'.$this->getMountPoint();
 	}
 
 	public function getPermissions(string $path = ''): int {
@@ -257,7 +257,7 @@ 
 	}
 
 	public function isCreatable(string $path): bool {
-		return (bool)($this->getPermissions($path) & Constants::PERMISSION_CREATE);
+		return (bool) ($this->getPermissions($path) & Constants::PERMISSION_CREATE);
 	}
 
 	public function isReadable(string $path): bool {
@@ -274,18 +274,18 @@ 
 	}
 
 	public function isUpdatable(string $path): bool {
-		return (bool)($this->getPermissions($path) & Constants::PERMISSION_UPDATE);
+		return (bool) ($this->getPermissions($path) & Constants::PERMISSION_UPDATE);
 	}
 
 	public function isDeletable(string $path): bool {
-		return (bool)($this->getPermissions($path) & Constants::PERMISSION_DELETE);
+		return (bool) ($this->getPermissions($path) & Constants::PERMISSION_DELETE);
 	}
 
 	public function isSharable(string $path): bool {
 		if (Util::isSharingDisabledForUser() || !Share::isResharingAllowed()) {
 			return false;
 		}
-		return (bool)($this->getPermissions($path) & Constants::PERMISSION_SHARE);
+		return (bool) ($this->getPermissions($path) & Constants::PERMISSION_SHARE);
 	}
 
 	public function fopen(string $path, string $mode) {
@@ -332,7 +332,7 @@ 
 				}
 		}
 		$info = [
-			'target' => $this->getMountPoint() . '/' . $path,
+			'target' => $this->getMountPoint().'/'.$path,
 			'source' => $source,
 			'mode' => $mode,
 		];
@@ -426,7 +426,7 @@ 
 		return new Scanner($storage);
 	}
 
-	public function getOwner(string $path): string|false {
+	public function getOwner(string $path): string | false {
 		return $this->superShare->getShareOwner();
 	}
 
@@ -520,7 +520,7 @@ 
 		 * @psalm-suppress DocblockTypeContradiction
 		 */
 		if (!$this->storage) {
-			$message = 'no storage set after init for share ' . $this->getShareId();
+			$message = 'no storage set after init for share '.$this->getShareId();
 			$this->logger->error($message);
 			$this->storage = new FailedStorage(['exception' => new \Exception($message)]);
 		}
@@ -528,18 +528,18 @@ 
 		return $this->storage;
 	}
 
-	public function file_get_contents(string $path): string|false {
+	public function file_get_contents(string $path): string | false {
 		$info = [
-			'target' => $this->getMountPoint() . '/' . $path,
+			'target' => $this->getMountPoint().'/'.$path,
 			'source' => $this->getUnjailedPath($path),
 		];
 		Util::emitHook('\OC\Files\Storage\Shared', 'file_get_contents', $info);
 		return parent::file_get_contents($path);
 	}
 
-	public function file_put_contents(string $path, mixed $data): int|float|false {
+	public function file_put_contents(string $path, mixed $data): int | float | false {
 		$info = [
-			'target' => $this->getMountPoint() . '/' . $path,
+			'target' => $this->getMountPoint().'/'.$path,
 			'source' => $this->getUnjailedPath($path),
 		];
 		Util::emitHook('\OC\Files\Storage\Shared', 'file_put_contents', $info);
@@ -556,7 +556,7 @@ 
 		return parent::getUnjailedPath($path);
 	}
 
-	public function getDirectDownload(string $path): array|false {
+	public function getDirectDownload(string $path): array | false {
 		// disable direct download for shares
 		return [];
 	}