remove no longer accessible shares

Signed-off-by: Robin Appelman <[email protected]>

apps/files_sharing/lib/SharedStorage.php

@@ -147,9 +147,7 @@ private function init() {
 			/** @var Node|false $ownerNode */
 			$ownerNode = current($ownerNodes);
 			if (!$ownerNode) {
-				$this->storage = new FailedStorage(['exception' => new NotFoundException("File by id $sourceId not found")]);
-				$this->cache = new FailedCache();
-				$this->rootPath = '';
+				throw new NotFoundException("File by id $sourceId not found");
 			} else {
 				$this->nonMaskedStorage = $ownerNode->getStorage();
 				$this->sourcePath = $ownerNode->getPath();
@@ -164,6 +162,8 @@ private function init() {
 			$this->storage = new FailedStorage(['exception' => $e]);
 			$this->cache = new FailedCache();
 			$this->rootPath = '';
+			$this->logger->error("Share source no longer available, removing share", ['exception' => $e, 'app' => 'files_sharing']);
+			$this->unshareStorage();
 		} catch (NoUserException $e) {
 			// sharer user deleted, set FailedStorage
 			$this->storage = new FailedStorage(['exception' => $e]);