handle noopscanner in shared scanner

apps/files_sharing/lib/scanner.php

@@ -22,10 +22,14 @@
 
 namespace OC\Files\Cache;
 
+use OC\Files\ObjectStore\NoopScanner;
+use OC\Files\Storage\Shared;
+
 /**
  * Scanner for SharedStorage
  */
 class SharedScanner extends Scanner {
+	private $sourceScanner;
 
 	/**
 	 * Returns metadata from the shared storage, but
@@ -35,12 +39,35 @@ class SharedScanner extends Scanner {
 	 *
 	 * @return array an array of metadata of the file
 	 */
-	protected function getData($path){
+	public function getData($path) {
 		$data = parent::getData($path);
 		$sourcePath = $this->storage->getSourcePath($path);
 		list($sourceStorage, $internalPath) = \OC\Files\Filesystem::resolvePath($sourcePath);
 		$data['permissions'] = $sourceStorage->getPermissions($internalPath);
 		return $data;
 	}
+
+	private function getSourceScanner() {
+		if ($this->sourceScanner) {
+			return $this->sourceScanner;
+		}
+		if ($this->storage->instanceOfStorage('\OC\Files\Storage\Shared')) {
+			/** @var \OC\Files\Storage\Storage $storage */
+			list($storage) = $this->storage->resolvePath('');
+			$this->sourceScanner = $storage->getScanner();
+			return $this->sourceScanner;
+		} else {
+			return null;
+		}
+	}
+
+	public function scanFile($file, $reuseExisting = 0, $parentId = -1, $cacheData = null, $lock = true) {
+		$sourceScanner = $this->getSourceScanner();
+		if ($sourceScanner instanceof NoopScanner) {
+			return [];
+		} else {
+			return parent::scanFile($file, $reuseExisting, $parentId, $cacheData, $lock);
+		}
+	}
 }
 

apps/files_sharing/lib/sharedstorage.php

@@ -609,7 +609,7 @@ class Shared extends \OC\Files\Storage\Common implements ISharedStorage {
 	 * @param string $path
 	 * @return array
 	 */
-	private function resolvePath($path) {
+	public function resolvePath($path) {
 		$source = $this->getSourcePath($path);
 		return \OC\Files\Filesystem::resolvePath($source);
 	}