add option to show hidden files in SMB shares

Note hidden files can mean different things in smb and the option the the files web ui,
the webui only counts files starting with '.' as hidden, while smb files
can be marked as hidden regardless, any files that are marked as hidden
on smb will thus be shown in the webui regardless of the setting in the files app.

Fixes #15644

Signed-off-by: Robin Appelman <robin@icewind.nl>

apps/files_external/lib/Lib/Backend/SMB.php

@@ -50,6 +50,9 @@ class SMB extends Backend {
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
 				(new DefinitionParameter('domain', $l->t('Domain')))
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
+				(new DefinitionParameter('show_hidden', $l->t('Show hidden files')))
+					->setType(DefinitionParameter::VALUE_BOOLEAN)
+					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
 			])
 			->addAuthScheme(AuthMechanism::SCHEME_PASSWORD)
 			->addAuthScheme(AuthMechanism::SCHEME_SMB)

apps/files_external/lib/Lib/Storage/SMB.php

@@ -82,6 +82,9 @@ class SMB extends Common implements INotifyStorage {
 	/** @var ILogger */
 	protected $logger;
 
+	/** @var bool */
+	protected $showHidden;
+
 	public function __construct($params) {
 		if (!isset($params['host'])) {
 			throw new \Exception('Invalid configuration, no host provided');
@@ -110,6 +113,8 @@ class SMB extends Common implements INotifyStorage {
 		$this->root = '/' . ltrim($this->root, '/');
 		$this->root = rtrim($this->root, '/') . '/';
 
+		$this->showHidden = isset($params['show_hidden']) && $params['show_hidden'];
+
 		$this->statCache = new CappedMemoryCache();
 		parent::__construct($params);
 	}
@@ -184,10 +189,13 @@ class SMB extends Common implements INotifyStorage {
 			}
 			return array_filter($files, function (IFileInfo $file) {
 				try {
-					if ($file->isHidden()) {
+					// the isHidden check is done before checking the config boolean to ensure that the metadata is always fetch
+					// so we trigger the below exceptions where applicable
+					$hide = $file->isHidden() && !$this->showHidden;
+					if ($hide) {
 						$this->logger->debug('hiding hidden file ' . $file->getName());
 					}
-					return !$file->isHidden();
+					return !$hide;
 				} catch (ForbiddenException $e) {
 					$this->logger->logException($e, ['level' => ILogger::DEBUG, 'message' => 'Hiding forbidden entry ' . $file->getName()]);
 					return false;
@@ -526,7 +534,7 @@ class SMB extends Common implements INotifyStorage {
 	public function isReadable($path) {
 		try {
 			$info = $this->getFileInfo($path);
-			return !$info->isHidden();
+			return $this->showHidden || !$info->isHidden();
 		} catch (NotFoundException $e) {
 			return false;
 		} catch (ForbiddenException $e) {
@@ -539,7 +547,7 @@ class SMB extends Common implements INotifyStorage {
 			$info = $this->getFileInfo($path);
 			// following windows behaviour for read-only folders: they can be written into
 			// (https://support.microsoft.com/en-us/kb/326549 - "cause" section)
-			return !$info->isHidden() && (!$info->isReadOnly() || $this->is_dir($path));
+			return ($this->showHidden || !$info->isHidden()) && (!$info->isReadOnly() || $this->is_dir($path));
 		} catch (NotFoundException $e) {
 			return false;
 		} catch (ForbiddenException $e) {
@@ -550,7 +558,7 @@ class SMB extends Common implements INotifyStorage {
 	public function isDeletable($path) {
 		try {
 			$info = $this->getFileInfo($path);
-			return !$info->isHidden() && !$info->isReadOnly();
+			return ($this->showHidden || !$info->isHidden()) && !$info->isReadOnly();
 		} catch (NotFoundException $e) {
 			return false;
 		} catch (ForbiddenException $e) {