optionally hide hidden files if accessed via public share

lib/private/Files/Cache/Cache.php

@@ -257,6 +257,34 @@ public function getFolderContentsById($fileId) {
 		return [];
 	}
 
+	/**
+	 * get the metadata of all files stored in $folder except hidden files
+	 *
+	 * @param int $fileId the file id of the folder
+	 * @return ICacheEntry[]
+	 */
+	public function getFolderContentsByIdExceptHidden($fileId) {
+		if ($fileId > -1) {
+			$query = $this->getQueryBuilder();
+			$query->selectFileCache()
+				->whereParent($fileId)
+ 				->andWhere($query->expr()->notlike('name', $query->createNamedParameter('.%')))
+				->orderBy('name', 'ASC');
+
+			$metadataQuery = $query->selectMetadata();
+
+			$result = $query->execute();
+			$files = $result->fetchAll();
+			$result->closeCursor();
+
+			return array_map(function (array $data) use ($metadataQuery) {
+				$data['metadata'] = $metadataQuery?->extractMetadata($data)->asArray() ?? [];
+				return self::cacheEntryFromData($data, $this->mimetypeLoader);
+			}, $files);
+		}
+		return [];
+	}
+
 	/**
 	 * insert or update meta data for a file or folder
 	 *

lib/private/Files/View.php

@@ -66,6 +66,7 @@
 use OCP\Files\NotFoundException;
 use OCP\Files\ReservedWordException;
 use OCP\Files\Storage\IStorage;
+use OCP\IConfig;
 use OCP\IUser;
 use OCP\Lock\ILockingProvider;
 use OCP\Lock\LockedException;
@@ -95,6 +96,9 @@ class View {
 	private UserManager $userManager;
 	private LoggerInterface $logger;
 
+	/** @var IConfig */
+	protected $config;
+
 	/**
 	 * @throws \Exception If $root contains an invalid path
 	 */
@@ -103,6 +107,7 @@ public function __construct(string $root = '') {
 			throw new \Exception();
 		}
 
+		$this->config = \OC::$server->getConfig();
 		$this->fakeRoot = $root;
 		$this->lockingProvider = \OC::$server->getLockingProvider();
 		$this->lockingEnabled = !($this->lockingProvider instanceof \OC\Lock\NoopLockingProvider);
@@ -1454,7 +1459,12 @@ public function getDirectoryContent($directory, $mimetype_filter = '', \OCP\File
 		}
 
 		$folderId = $data->getId();
-		$contents = $cache->getFolderContentsById($folderId); //TODO: mimetype_filter
+		$systemConfigHideHiddenFilesViaPublicShareAccess = $this->config->getSystemValueBool('hide_hidden_files_via_public_share_access', false);
+		if ( $_SERVER['REQUEST_URI'] === "/public.php/webdav/" && $systemConfigHideHiddenFilesViaPublicShareAccess ){
+			$contents = $cache->getFolderContentsByIdExceptHidden($folderId); //TODO: mimetype_filter
+		}else{
+			$contents = $cache->getFolderContentsById($folderId); //TODO: mimetype_filter
+		}
 
 		$sharingDisabled = \OCP\Util::isSharingDisabledForUser();