Ignore favorites that are not available when creating the favorites list

Also correctly return the exception for all cases when adding/removing favos

apps/files/controller/apicontroller.php

@@ -67,6 +67,7 @@ class ApiController extends Controller {
 	 *
 	 * @param string $path path
 	 * @param array  $tags array of tags
+	 * @return DataResponse
 	 */
 	public function updateFileTags($path, $tags = null) {
 		$result = array();
@@ -76,6 +77,10 @@ class ApiController extends Controller {
 				$this->tagService->updateFileTags($path, $tags);
 			} catch (\OCP\Files\NotFoundException $e) {
 				return new DataResponse($e->getMessage(), Http::STATUS_NOT_FOUND);
+			} catch (\OCP\Files\StorageNotAvailableException $e) {
+				return new DataResponse($e->getMessage(), Http::STATUS_SERVICE_UNAVAILABLE);
+			} catch (\Exception $e) {
+				return new DataResponse($e->getMessage(), Http::STATUS_NOT_FOUND);
 			}
 			$result['tags'] = $tags;
 		}
@@ -89,6 +94,7 @@ class ApiController extends Controller {
 	 * @CORS
 	 *
 	 * @param array $tagName tag name to filter by
+	 * @return DataResponse
 	 */
 	public function getFilesByTag($tagName) {
 		$files = array();

apps/files/service/tagservice.php

@@ -8,6 +8,8 @@
 
 namespace OCA\Files\Service;
 
+use OC\Files\FileInfo;
+
 /**
  * Service class to manage tags on files.
  */
@@ -84,11 +86,19 @@ class TagService {
 		$nodes = $this->homeFolder->searchByTag(
 			$tagName, $this->userSession->getUser()->getUId()
 		);
-		foreach ($nodes as &$node) {
-			$node = $node->getFileInfo();
+		$fileInfos = [];
+		foreach ($nodes as $node) {
+			try {
+				/** @var \OC\Files\Node\Node $node */
+				$fileInfos[] = $node->getFileInfo();
+			} catch (\Exception $e) {
+				// FIXME Should notify the user, when this happens
+				// Can not get FileInfo, maybe the connection to the external
+				// storage is interrupted.
+			}
 		}
 
-		return $nodes;
+		return $fileInfos;
 	}
 }