1 files changed, 55 insertions, 0 deletions
diff --git a/apps/files_sharing/lib/External/Scanner.php b/apps/files_sharing/lib/External/Scanner.php
new file mode 100644
index 00000000000..0d57248595b
--- /dev/null
+++ b/apps/files_sharing/lib/External/Scanner.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+namespace OCA\Files_Sharing\External;
+
+use OC\Files\Cache\CacheEntry;
+use OC\ForbiddenException;
+use OCP\Files\NotFoundException;
+use OCP\Files\StorageInvalidException;
+use OCP\Files\StorageNotAvailableException;
+
+class Scanner extends \OC\Files\Cache\Scanner {
+	/** @var Storage */
+	protected $storage;
+
+	public function scan($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $lock = true) {
+		// Disable locking for federated shares
+		parent::scan($path, $recursive, $reuse, false);
+	}
+
+	/**
+	 * Scan a single file and store it in the cache.
+	 * If an exception happened while accessing the external storage,
+	 * the storage will be checked for availability and removed
+	 * if it is not available any more.
+	 *
+	 * @param string $file file to scan
+	 * @param int $reuseExisting
+	 * @param int $parentId
+	 * @param CacheEntry|array|null|false $cacheData existing data in the cache for the file to be scanned
+	 * @param bool $lock set to false to disable getting an additional read lock during scanning
+	 * @param array|null $data the metadata for the file, as returned by the storage
+	 * @return array|null an array of metadata of the scanned file
+	 */
+	public function scanFile($file, $reuseExisting = 0, $parentId = -1, $cacheData = null, $lock = true, $data = null) {
+		try {
+			return parent::scanFile($file, $reuseExisting, $parentId, $cacheData, $lock, $data);
+		} catch (ForbiddenException $e) {
+			$this->storage->checkStorageAvailability();
+		} catch (NotFoundException $e) {
+			// if the storage isn't found, the call to
+			// checkStorageAvailable() will verify it and remove it
+			// if appropriate
+			$this->storage->checkStorageAvailability();
+		} catch (StorageInvalidException $e) {
+			$this->storage->checkStorageAvailability();
+		} catch (StorageNotAvailableException $e) {
+			$this->storage->checkStorageAvailability();
+		}
+	}
+}