nextcloud / server

apps/files_versions/lib/Listener/FileEventsListener.php

Indentation +422 added lines, -422 removed lines

@@ -43,426 +43,426 @@
 
 /** @template-implements IEventListener<BeforeNodeCopiedEvent|BeforeNodeDeletedEvent|BeforeNodeRenamedEvent|BeforeNodeTouchedEvent|BeforeNodeWrittenEvent|NodeCopiedEvent|NodeCreatedEvent|NodeDeletedEvent|NodeRenamedEvent|NodeTouchedEvent|NodeWrittenEvent> */
 class FileEventsListener implements IEventListener {
-	/**
-	 * @var array<int, array>
-	 */
-	private array $writeHookInfo = [];
-	/**
-	 * @var array<int, Node>
-	 */
-	private array $nodesTouched = [];
-	/**
-	 * @var array<string, Node>
-	 */
-	private array $versionsDeleted = [];
-
-	public function __construct(
-		private IRootFolder $rootFolder,
-		private IVersionManager $versionManager,
-		private IMimeTypeLoader $mimeTypeLoader,
-		private IUserSession $userSession,
-		private LoggerInterface $logger,
-	) {
-	}
-
-	public function handle(Event $event): void {
-		if ($event instanceof NodeCreatedEvent) {
-			$this->created($event->getNode());
-		}
-
-		if ($event instanceof BeforeNodeTouchedEvent) {
-			$this->pre_touch_hook($event->getNode());
-		}
-
-		if ($event instanceof NodeTouchedEvent) {
-			$this->touch_hook($event->getNode());
-		}
-
-		if ($event instanceof BeforeNodeWrittenEvent) {
-			$this->write_hook($event->getNode());
-		}
-
-		if ($event instanceof NodeWrittenEvent) {
-			$this->post_write_hook($event->getNode());
-		}
-
-		if ($event instanceof BeforeNodeDeletedEvent) {
-			$this->pre_remove_hook($event->getNode());
-		}
-
-		if ($event instanceof NodeDeletedEvent) {
-			$this->remove_hook($event->getNode());
-		}
-
-		if ($event instanceof NodeRenamedEvent) {
-			$this->rename_hook($event->getSource(), $event->getTarget());
-		}
-
-		if ($event instanceof NodeCopiedEvent) {
-			$this->copy_hook($event->getSource(), $event->getTarget());
-		}
-
-		if ($event instanceof BeforeNodeRenamedEvent) {
-			$this->pre_renameOrCopy_hook($event->getSource(), $event->getTarget());
-		}
-
-		if ($event instanceof BeforeNodeCopiedEvent) {
-			$this->pre_renameOrCopy_hook($event->getSource(), $event->getTarget());
-		}
-	}
-
-	public function pre_touch_hook(Node $node): void {
-		// Do not handle folders.
-		if ($node instanceof Folder) {
-			return;
-		}
-
-		// $node is a non-existing on file creation.
-		if ($node instanceof NonExistingFile) {
-			return;
-		}
-
-		$this->nodesTouched[$node->getId()] = $node;
-	}
-
-	public function touch_hook(Node $node): void {
-		// Do not handle folders.
-		if ($node instanceof Folder) {
-			return;
-		}
-
-		if ($node instanceof NonExistingFile) {
-			$this->logger->error(
-				'Failed to create or update version for {path}, node does not exist',
-				[
-					'path' => $node->getPath(),
-				]
-			);
-
-			return;
-		}
-
-		$previousNode = $this->nodesTouched[$node->getId()] ?? null;
-
-		if ($previousNode === null) {
-			return;
-		}
-
-		unset($this->nodesTouched[$node->getId()]);
-
-		try {
-			if ($node instanceof File && $this->versionManager instanceof INeedSyncVersionBackend) {
-				// We update the timestamp of the version entity associated with the previousNode.
-				$this->versionManager->updateVersionEntity($node, $previousNode->getMTime(), ['timestamp' => $node->getMTime()]);
-			}
-		} catch (DbalException $ex) {
-			// Ignore UniqueConstraintViolationException, as we are probably in the middle of a rollback
-			// Where the previous node would temporary have the mtime of the old version, so the rollback touches it to fix it.
-			if (!($ex->getPrevious() instanceof UniqueConstraintViolationException)) {
-				throw $ex;
-			}
-		} catch (DoesNotExistException $ex) {
-			// Ignore DoesNotExistException, as we are probably in the middle of a rollback
-			// Where the previous node would temporary have a wrong mtime, so the rollback touches it to fix it.
-		}
-	}
-
-	public function created(Node $node): void {
-		// Do not handle folders.
-		if (!($node instanceof File)) {
-			return;
-		}
-
-		if ($node instanceof NonExistingFile) {
-			$this->logger->error(
-				'Failed to create version for {path}, node does not exist',
-				[
-					'path' => $node->getPath(),
-				]
-			);
-
-			return;
-		}
-
-		if ($this->versionManager instanceof INeedSyncVersionBackend) {
-			$this->versionManager->createVersionEntity($node);
-		}
-	}
-
-	/**
-	 * listen to write event.
-	 */
-	public function write_hook(Node $node): void {
-		// Do not handle folders.
-		if ($node instanceof Folder) {
-			return;
-		}
-
-		// $node is a non-existing on file creation.
-		if ($node instanceof NonExistingFile) {
-			return;
-		}
-
-		$path = $this->getPathForNode($node);
-		$result = Storage::store($path);
-
-		// Store the result of the version creation so it can be used in post_write_hook.
-		$this->writeHookInfo[$node->getId()] = [
-			'previousNode' => $node,
-			'versionCreated' => $result !== false
-		];
-	}
-
-	/**
-	 * listen to post_write event.
-	 */
-	public function post_write_hook(Node $node): void {
-		// Do not handle folders.
-		if ($node instanceof Folder) {
-			return;
-		}
-
-		if ($node instanceof NonExistingFile) {
-			$this->logger->error(
-				'Failed to create or update version for {path}, node does not exist',
-				[
-					'path' => $node->getPath(),
-				]
-			);
-
-			return;
-		}
-
-		$writeHookInfo = $this->writeHookInfo[$node->getId()] ?? null;
-
-		if ($writeHookInfo === null) {
-			return;
-		}
-
-		if (
-			$writeHookInfo['versionCreated']
-			&& $node->getMTime() !== $writeHookInfo['previousNode']->getMTime()
-		) {
-			// If a new version was created, insert a version in the DB for the current content.
-			// If both versions have the same mtime, it means the latest version file simply got overrode,
-			// so no need to create a new version.
-			$this->created($node);
-		} else {
-			try {
-				// If no new version was stored in the FS, no new version should be added in the DB.
-				// So we simply update the associated version.
-				if ($node instanceof File && $this->versionManager instanceof INeedSyncVersionBackend) {
-					$this->versionManager->updateVersionEntity(
-						$node,
-						$writeHookInfo['previousNode']->getMtime(),
-						[
-							'timestamp' => $node->getMTime(),
-							'size' => $node->getSize(),
-							'mimetype' => $this->mimeTypeLoader->getId($node->getMimetype()),
-						],
-					);
-				}
-			} catch (DoesNotExistException $e) {
-				// This happens if the versions app was not enabled while the file was created or updated the last time.
-				// meaning there is no such revision and we need to create this file.
-				if ($writeHookInfo['versionCreated']) {
-					$this->created($node);
-				} else {
-					// Normally this should not happen so we re-throw the exception to not hide any potential issues.
-					throw $e;
-				}
-			} catch (Exception $e) {
-				$this->logger->error('Failed to update existing version for ' . $node->getPath(), [
-					'exception' => $e,
-					'versionCreated' => $writeHookInfo['versionCreated'],
-					'previousNode' => [
-						'size' => $writeHookInfo['previousNode']->getSize(),
-						'mtime' => $writeHookInfo['previousNode']->getMTime(),
-					],
-					'node' => [
-						'size' => $node->getSize(),
-						'mtime' => $node->getMTime(),
-					]
-				]);
-				throw $e;
-			}
-		}
-
-		unset($this->writeHookInfo[$node->getId()]);
-	}
-
-	/**
-	 * Erase versions of deleted file
-	 *
-	 * This function is connected to the NodeDeletedEvent event
-	 * cleanup the versions directory if the actual file gets deleted
-	 */
-	public function remove_hook(Node $node): void {
-		// Need to normalize the path as there is an issue with path concatenation in View.php::getAbsolutePath.
-		$path = Filesystem::normalizePath($node->getPath());
-		if (!array_key_exists($path, $this->versionsDeleted)) {
-			return;
-		}
-		$node = $this->versionsDeleted[$path];
-		$relativePath = $this->getPathForNode($node);
-		unset($this->versionsDeleted[$path]);
-		Storage::delete($relativePath);
-		// If no new version was stored in the FS, no new version should be added in the DB.
-		// So we simply update the associated version.
-		if ($node instanceof File && $this->versionManager instanceof INeedSyncVersionBackend) {
-			$this->versionManager->deleteVersionsEntity($node);
-		}
-	}
-
-	/**
-	 * mark file as "deleted" so that we can clean up the versions if the file is gone
-	 */
-	public function pre_remove_hook(Node $node): void {
-		$path = $this->getPathForNode($node);
-		Storage::markDeletedFile($path);
-		$this->versionsDeleted[$node->getPath()] = $node;
-	}
-
-	/**
-	 * rename/move versions of renamed/moved files
-	 *
-	 * This function is connected to the NodeRenamedEvent event and adjust the name and location
-	 * of the stored versions along the actual file
-	 */
-	public function rename_hook(Node $source, Node $target): void {
-		$sourceBackend = $this->versionManager->getBackendForStorage($source->getParent()->getStorage());
-		$targetBackend = $this->versionManager->getBackendForStorage($target->getStorage());
-		// If different backends, do nothing.
-		if ($sourceBackend !== $targetBackend) {
-			return;
-		}
-
-		$oldPath = $this->getPathForNode($source);
-		$newPath = $this->getPathForNode($target);
-		Storage::renameOrCopy($oldPath, $newPath, 'rename');
-	}
-
-	/**
-	 * copy versions of copied files
-	 *
-	 * This function is connected to the NodeCopiedEvent event and copies the
-	 * the stored versions to the new location
-	 */
-	public function copy_hook(Node $source, Node $target): void {
-		$sourceBackend = $this->versionManager->getBackendForStorage($source->getParent()->getStorage());
-		$targetBackend = $this->versionManager->getBackendForStorage($target->getStorage());
-		// If different backends, do nothing.
-		if ($sourceBackend !== $targetBackend) {
-			return;
-		}
-
-		$oldPath = $this->getPathForNode($source);
-		$newPath = $this->getPathForNode($target);
-		Storage::renameOrCopy($oldPath, $newPath, 'copy');
-	}
-
-	/**
-	 * Remember owner and the owner path of the source file.
-	 * If the file already exists, then it was a upload of a existing file
-	 * over the web interface and we call Storage::store() directly
-	 *
-	 *
-	 */
-	public function pre_renameOrCopy_hook(Node $source, Node $target): void {
-		$sourceBackend = $this->versionManager->getBackendForStorage($source->getStorage());
-		$targetBackend = $this->versionManager->getBackendForStorage($target->getParent()->getStorage());
-		// If different backends, do nothing.
-		if ($sourceBackend !== $targetBackend) {
-			return;
-		}
-
-		// if we rename a movable mount point, then the versions don't have to be renamed
-		$oldPath = $this->getPathForNode($source);
-		$newPath = $this->getPathForNode($target);
-		if ($oldPath === null || $newPath === null) {
-			return;
-		}
-
-		$user = $this->userSession->getUser()?->getUID();
-		if ($user === null) {
-			return;
-		}
-
-		$absOldPath = Filesystem::normalizePath('/' . $user . '/files' . $oldPath);
-		$manager = Filesystem::getMountManager();
-		$mount = $manager->find($absOldPath);
-		$internalPath = $mount->getInternalPath($absOldPath);
-		if ($internalPath === '' and $mount instanceof MoveableMount) {
-			return;
-		}
-
-		$view = new View($user . '/files');
-		if ($view->file_exists($newPath)) {
-			Storage::store($newPath);
-		} else {
-			Storage::setSourcePathAndUser($oldPath);
-		}
-	}
-
-	/**
-	 * Retrieve the path relative to the current user root folder.
-	 * If no user is connected, try to use the node's owner.
-	 */
-	private function getPathForNode(Node $node): ?string {
-		$user = $this->userSession->getUser()?->getUID();
-		if ($user) {
-			$path = $this->rootFolder
-				->getUserFolder($user)
-				->getRelativePath($node->getPath());
-
-			if ($path !== null) {
-				return $path;
-			}
-		}
-
-		try {
-			$owner = $node->getOwner()?->getUid();
-		} catch (NotFoundException) {
-			$owner = null;
-		}
-
-		// If no owner, extract it from the path.
-		// e.g. /user/files/foobar.txt
-		if (!$owner) {
-			$parts = explode('/', $node->getPath(), 4);
-			if (count($parts) === 4) {
-				$owner = $parts[1];
-			}
-		}
-
-		if ($owner) {
-			$path = $this->rootFolder
-				->getUserFolder($owner)
-				->getRelativePath($node->getPath());
-
-			if ($path !== null) {
-				return $path;
-			}
-		}
-
-		if (!($node instanceof NonExistingFile) && !($node instanceof NonExistingFolder)) {
-			$this->logger->debug('Failed to compute path for node', [
-				'node' => [
-					'path' => $node->getPath(),
-					'owner' => $owner,
-					'fileid' => $node->getId(),
-					'size' => $node->getSize(),
-					'mtime' => $node->getMTime(),
-				]
-			]);
-		} else {
-			$this->logger->debug('Failed to compute path for node', [
-				'node' => [
-					'path' => $node->getPath(),
-					'owner' => $owner,
-				]
-			]);
-		}
-		return null;
-	}
+    /**
+     * @var array<int, array>
+     */
+    private array $writeHookInfo = [];
+    /**
+     * @var array<int, Node>
+     */
+    private array $nodesTouched = [];
+    /**
+     * @var array<string, Node>
+     */
+    private array $versionsDeleted = [];
+
+    public function __construct(
+        private IRootFolder $rootFolder,
+        private IVersionManager $versionManager,
+        private IMimeTypeLoader $mimeTypeLoader,
+        private IUserSession $userSession,
+        private LoggerInterface $logger,
+    ) {
+    }
+
+    public function handle(Event $event): void {
+        if ($event instanceof NodeCreatedEvent) {
+            $this->created($event->getNode());
+        }
+
+        if ($event instanceof BeforeNodeTouchedEvent) {
+            $this->pre_touch_hook($event->getNode());
+        }
+
+        if ($event instanceof NodeTouchedEvent) {
+            $this->touch_hook($event->getNode());
+        }
+
+        if ($event instanceof BeforeNodeWrittenEvent) {
+            $this->write_hook($event->getNode());
+        }
+
+        if ($event instanceof NodeWrittenEvent) {
+            $this->post_write_hook($event->getNode());
+        }
+
+        if ($event instanceof BeforeNodeDeletedEvent) {
+            $this->pre_remove_hook($event->getNode());
+        }
+
+        if ($event instanceof NodeDeletedEvent) {
+            $this->remove_hook($event->getNode());
+        }
+
+        if ($event instanceof NodeRenamedEvent) {
+            $this->rename_hook($event->getSource(), $event->getTarget());
+        }
+
+        if ($event instanceof NodeCopiedEvent) {
+            $this->copy_hook($event->getSource(), $event->getTarget());
+        }
+
+        if ($event instanceof BeforeNodeRenamedEvent) {
+            $this->pre_renameOrCopy_hook($event->getSource(), $event->getTarget());
+        }
+
+        if ($event instanceof BeforeNodeCopiedEvent) {
+            $this->pre_renameOrCopy_hook($event->getSource(), $event->getTarget());
+        }
+    }
+
+    public function pre_touch_hook(Node $node): void {
+        // Do not handle folders.
+        if ($node instanceof Folder) {
+            return;
+        }
+
+        // $node is a non-existing on file creation.
+        if ($node instanceof NonExistingFile) {
+            return;
+        }
+
+        $this->nodesTouched[$node->getId()] = $node;
+    }
+
+    public function touch_hook(Node $node): void {
+        // Do not handle folders.
+        if ($node instanceof Folder) {
+            return;
+        }
+
+        if ($node instanceof NonExistingFile) {
+            $this->logger->error(
+                'Failed to create or update version for {path}, node does not exist',
+                [
+                    'path' => $node->getPath(),
+                ]
+            );
+
+            return;
+        }
+
+        $previousNode = $this->nodesTouched[$node->getId()] ?? null;
+
+        if ($previousNode === null) {
+            return;
+        }
+
+        unset($this->nodesTouched[$node->getId()]);
+
+        try {
+            if ($node instanceof File && $this->versionManager instanceof INeedSyncVersionBackend) {
+                // We update the timestamp of the version entity associated with the previousNode.
+                $this->versionManager->updateVersionEntity($node, $previousNode->getMTime(), ['timestamp' => $node->getMTime()]);
+            }
+        } catch (DbalException $ex) {
+            // Ignore UniqueConstraintViolationException, as we are probably in the middle of a rollback
+            // Where the previous node would temporary have the mtime of the old version, so the rollback touches it to fix it.
+            if (!($ex->getPrevious() instanceof UniqueConstraintViolationException)) {
+                throw $ex;
+            }
+        } catch (DoesNotExistException $ex) {
+            // Ignore DoesNotExistException, as we are probably in the middle of a rollback
+            // Where the previous node would temporary have a wrong mtime, so the rollback touches it to fix it.
+        }
+    }
+
+    public function created(Node $node): void {
+        // Do not handle folders.
+        if (!($node instanceof File)) {
+            return;
+        }
+
+        if ($node instanceof NonExistingFile) {
+            $this->logger->error(
+                'Failed to create version for {path}, node does not exist',
+                [
+                    'path' => $node->getPath(),
+                ]
+            );
+
+            return;
+        }
+
+        if ($this->versionManager instanceof INeedSyncVersionBackend) {
+            $this->versionManager->createVersionEntity($node);
+        }
+    }
+
+    /**
+     * listen to write event.
+     */
+    public function write_hook(Node $node): void {
+        // Do not handle folders.
+        if ($node instanceof Folder) {
+            return;
+        }
+
+        // $node is a non-existing on file creation.
+        if ($node instanceof NonExistingFile) {
+            return;
+        }
+
+        $path = $this->getPathForNode($node);
+        $result = Storage::store($path);
+
+        // Store the result of the version creation so it can be used in post_write_hook.
+        $this->writeHookInfo[$node->getId()] = [
+            'previousNode' => $node,
+            'versionCreated' => $result !== false
+        ];
+    }
+
+    /**
+     * listen to post_write event.
+     */
+    public function post_write_hook(Node $node): void {
+        // Do not handle folders.
+        if ($node instanceof Folder) {
+            return;
+        }
+
+        if ($node instanceof NonExistingFile) {
+            $this->logger->error(
+                'Failed to create or update version for {path}, node does not exist',
+                [
+                    'path' => $node->getPath(),
+                ]
+            );
+
+            return;
+        }
+
+        $writeHookInfo = $this->writeHookInfo[$node->getId()] ?? null;
+
+        if ($writeHookInfo === null) {
+            return;
+        }
+
+        if (
+            $writeHookInfo['versionCreated']
+            && $node->getMTime() !== $writeHookInfo['previousNode']->getMTime()
+        ) {
+            // If a new version was created, insert a version in the DB for the current content.
+            // If both versions have the same mtime, it means the latest version file simply got overrode,
+            // so no need to create a new version.
+            $this->created($node);
+        } else {
+            try {
+                // If no new version was stored in the FS, no new version should be added in the DB.
+                // So we simply update the associated version.
+                if ($node instanceof File && $this->versionManager instanceof INeedSyncVersionBackend) {
+                    $this->versionManager->updateVersionEntity(
+                        $node,
+                        $writeHookInfo['previousNode']->getMtime(),
+                        [
+                            'timestamp' => $node->getMTime(),
+                            'size' => $node->getSize(),
+                            'mimetype' => $this->mimeTypeLoader->getId($node->getMimetype()),
+                        ],
+                    );
+                }
+            } catch (DoesNotExistException $e) {
+                // This happens if the versions app was not enabled while the file was created or updated the last time.
+                // meaning there is no such revision and we need to create this file.
+                if ($writeHookInfo['versionCreated']) {
+                    $this->created($node);
+                } else {
+                    // Normally this should not happen so we re-throw the exception to not hide any potential issues.
+                    throw $e;
+                }
+            } catch (Exception $e) {
+                $this->logger->error('Failed to update existing version for ' . $node->getPath(), [
+                    'exception' => $e,
+                    'versionCreated' => $writeHookInfo['versionCreated'],
+                    'previousNode' => [
+                        'size' => $writeHookInfo['previousNode']->getSize(),
+                        'mtime' => $writeHookInfo['previousNode']->getMTime(),
+                    ],
+                    'node' => [
+                        'size' => $node->getSize(),
+                        'mtime' => $node->getMTime(),
+                    ]
+                ]);
+                throw $e;
+            }
+        }
+
+        unset($this->writeHookInfo[$node->getId()]);
+    }
+
+    /**
+     * Erase versions of deleted file
+     *
+     * This function is connected to the NodeDeletedEvent event
+     * cleanup the versions directory if the actual file gets deleted
+     */
+    public function remove_hook(Node $node): void {
+        // Need to normalize the path as there is an issue with path concatenation in View.php::getAbsolutePath.
+        $path = Filesystem::normalizePath($node->getPath());
+        if (!array_key_exists($path, $this->versionsDeleted)) {
+            return;
+        }
+        $node = $this->versionsDeleted[$path];
+        $relativePath = $this->getPathForNode($node);
+        unset($this->versionsDeleted[$path]);
+        Storage::delete($relativePath);
+        // If no new version was stored in the FS, no new version should be added in the DB.
+        // So we simply update the associated version.
+        if ($node instanceof File && $this->versionManager instanceof INeedSyncVersionBackend) {
+            $this->versionManager->deleteVersionsEntity($node);
+        }
+    }
+
+    /**
+     * mark file as "deleted" so that we can clean up the versions if the file is gone
+     */
+    public function pre_remove_hook(Node $node): void {
+        $path = $this->getPathForNode($node);
+        Storage::markDeletedFile($path);
+        $this->versionsDeleted[$node->getPath()] = $node;
+    }
+
+    /**
+     * rename/move versions of renamed/moved files
+     *
+     * This function is connected to the NodeRenamedEvent event and adjust the name and location
+     * of the stored versions along the actual file
+     */
+    public function rename_hook(Node $source, Node $target): void {
+        $sourceBackend = $this->versionManager->getBackendForStorage($source->getParent()->getStorage());
+        $targetBackend = $this->versionManager->getBackendForStorage($target->getStorage());
+        // If different backends, do nothing.
+        if ($sourceBackend !== $targetBackend) {
+            return;
+        }
+
+        $oldPath = $this->getPathForNode($source);
+        $newPath = $this->getPathForNode($target);
+        Storage::renameOrCopy($oldPath, $newPath, 'rename');
+    }
+
+    /**
+     * copy versions of copied files
+     *
+     * This function is connected to the NodeCopiedEvent event and copies the
+     * the stored versions to the new location
+     */
+    public function copy_hook(Node $source, Node $target): void {
+        $sourceBackend = $this->versionManager->getBackendForStorage($source->getParent()->getStorage());
+        $targetBackend = $this->versionManager->getBackendForStorage($target->getStorage());
+        // If different backends, do nothing.
+        if ($sourceBackend !== $targetBackend) {
+            return;
+        }
+
+        $oldPath = $this->getPathForNode($source);
+        $newPath = $this->getPathForNode($target);
+        Storage::renameOrCopy($oldPath, $newPath, 'copy');
+    }
+
+    /**
+     * Remember owner and the owner path of the source file.
+     * If the file already exists, then it was a upload of a existing file
+     * over the web interface and we call Storage::store() directly
+     *
+     *
+     */
+    public function pre_renameOrCopy_hook(Node $source, Node $target): void {
+        $sourceBackend = $this->versionManager->getBackendForStorage($source->getStorage());
+        $targetBackend = $this->versionManager->getBackendForStorage($target->getParent()->getStorage());
+        // If different backends, do nothing.
+        if ($sourceBackend !== $targetBackend) {
+            return;
+        }
+
+        // if we rename a movable mount point, then the versions don't have to be renamed
+        $oldPath = $this->getPathForNode($source);
+        $newPath = $this->getPathForNode($target);
+        if ($oldPath === null || $newPath === null) {
+            return;
+        }
+
+        $user = $this->userSession->getUser()?->getUID();
+        if ($user === null) {
+            return;
+        }
+
+        $absOldPath = Filesystem::normalizePath('/' . $user . '/files' . $oldPath);
+        $manager = Filesystem::getMountManager();
+        $mount = $manager->find($absOldPath);
+        $internalPath = $mount->getInternalPath($absOldPath);
+        if ($internalPath === '' and $mount instanceof MoveableMount) {
+            return;
+        }
+
+        $view = new View($user . '/files');
+        if ($view->file_exists($newPath)) {
+            Storage::store($newPath);
+        } else {
+            Storage::setSourcePathAndUser($oldPath);
+        }
+    }
+
+    /**
+     * Retrieve the path relative to the current user root folder.
+     * If no user is connected, try to use the node's owner.
+     */
+    private function getPathForNode(Node $node): ?string {
+        $user = $this->userSession->getUser()?->getUID();
+        if ($user) {
+            $path = $this->rootFolder
+                ->getUserFolder($user)
+                ->getRelativePath($node->getPath());
+
+            if ($path !== null) {
+                return $path;
+            }
+        }
+
+        try {
+            $owner = $node->getOwner()?->getUid();
+        } catch (NotFoundException) {
+            $owner = null;
+        }
+
+        // If no owner, extract it from the path.
+        // e.g. /user/files/foobar.txt
+        if (!$owner) {
+            $parts = explode('/', $node->getPath(), 4);
+            if (count($parts) === 4) {
+                $owner = $parts[1];
+            }
+        }
+
+        if ($owner) {
+            $path = $this->rootFolder
+                ->getUserFolder($owner)
+                ->getRelativePath($node->getPath());
+
+            if ($path !== null) {
+                return $path;
+            }
+        }
+
+        if (!($node instanceof NonExistingFile) && !($node instanceof NonExistingFolder)) {
+            $this->logger->debug('Failed to compute path for node', [
+                'node' => [
+                    'path' => $node->getPath(),
+                    'owner' => $owner,
+                    'fileid' => $node->getId(),
+                    'size' => $node->getSize(),
+                    'mtime' => $node->getMTime(),
+                ]
+            ]);
+        } else {
+            $this->logger->debug('Failed to compute path for node', [
+                'node' => [
+                    'path' => $node->getPath(),
+                    'owner' => $owner,
+                ]
+            ]);
+        }
+        return null;
+    }
 }