Wrap-up changes for updated subfolders

When a subfolder is updated, the changes were not saved.
Changed folders are now tracked and changes metadata update are done for the all the changed folders instead of the top one.

Signed-off-by: Louis Chemineau <louis@chmn.me>

lib/Controller/LockingController.php

@@ -151,9 +151,14 @@ public function unlockFolder(int $id, ?string $shareToken = null): DataResponse
 			throw new OCSForbiddenException($this->l10n->t('You are not allowed to remove the lock'));
 		}
 
-		$this->fileService->finalizeChanges($nodes[0]);
+		$touchFoldersIds = $this->metaDataStorage->getTouchedFolders($token);
+		foreach ($touchFoldersIds as $folderId) {
+			$this->fileService->finalizeChanges($userFolder->getById($folderId)[0]);
 
-		$this->metaDataStorage->saveIntermediateFile($ownerId, $id);
+			$this->metaDataStorage->saveIntermediateFile($ownerId, $folderId);
+		}
+
+		$this->metaDataStorage->clearTouchedFolders($token);
 
 		try {
 			$this->lockManager->unlockFile($id, $token);

lib/Controller/MetaDataController.php

@@ -136,7 +136,7 @@ public function updateMetaData(int $id, string $metaData): DataResponse {
 		}
 
 		try {
-			$this->metaDataStorage->updateMetaDataIntoIntermediateFile($this->userId, $id, $metaData);
+			$this->metaDataStorage->updateMetaDataIntoIntermediateFile($this->userId, $id, $metaData, $e2eToken);
 		} catch (MissingMetaDataException $e) {
 			throw new OCSNotFoundException($this->l10n->t('Metadata-file does not exist'));
 		} catch (NotFoundException $e) {
@@ -201,7 +201,7 @@ public function addMetadataFileDrop(int $id, string $fileDrop, ?string $shareTok
 			$decodedMetadata['filedrop'] = array_merge($decodedMetadata['filedrop'] ?? [], $decodedFileDrop);
 			$encodedMetadata = json_encode($decodedMetadata);
 
-			$this->metaDataStorage->updateMetaDataIntoIntermediateFile($ownerId, $id, $encodedMetadata);
+			$this->metaDataStorage->updateMetaDataIntoIntermediateFile($ownerId, $id, $encodedMetadata, $e2eToken);
 		} catch (MissingMetaDataException $e) {
 			throw new OCSNotFoundException($this->l10n->t('Metadata-file does not exist'));
 		} catch (NotFoundException $e) {

lib/FileService.php

@@ -56,7 +56,7 @@ public function revertChanges(Folder $folder): bool {
 	}
 
 	/**
-	 * @return bool Whether this operation changed any files
+	 * @return bool Move and delete temporary files suffixed by .e2e-to-save and .e2e-to-delete
 	 */
 	public function finalizeChanges(Folder $folder): bool {
 		$intermediateFiles = $this->getIntermediateFiles($folder);

lib/IMetaDataStorage.php

@@ -58,7 +58,7 @@ public function setMetaDataIntoIntermediateFile(string $userId, int $id, string
 	 * @throws NotFoundException
 	 * @throws MissingMetaDataException
 	 */
-	public function updateMetaDataIntoIntermediateFile(string $userId, int $id, string $fileKey): void;
+	public function updateMetaDataIntoIntermediateFile(string $userId, int $id, string $fileKey, string $token = null): void;
 
 	/**
 	 * Moves intermediate metadata file to final file
@@ -84,4 +84,22 @@ public function deleteIntermediateFile(string $userId, int $id): void;
 	 * @throws NotFoundException
 	 */
 	public function deleteMetaData(string $userId, int $id): void;
+
+	/**
+	 * Return the list of folders marked as touched.
+	 *
+	 * @return int[]
+	 *
+	 * @throws NotPermittedException
+	 * @throws NotFoundException
+	 */
+	public function getTouchedFolders(string $token): array;
+
+	/**
+	 * Clear the list of touched folder for a token.
+	 *
+	 * @throws NotPermittedException
+	 * @throws NotFoundException
+	 */
+	public function clearTouchedFolders(?string $token): void;
 }

lib/MetaDataStorage.php

@@ -106,7 +106,7 @@ public function setMetaDataIntoIntermediateFile(string $userId, int $id, string
 	/**
 	 * @inheritDoc
 	 */
-	public function updateMetaDataIntoIntermediateFile(string $userId, int $id, string $fileKey): void {
+	public function updateMetaDataIntoIntermediateFile(string $userId, int $id, string $fileKey, string $token = null): void {
 		// ToDo check signature for race condition
 		$this->verifyFolderStructure();
 		$this->verifyOwner($userId, $id);
@@ -136,6 +136,18 @@ public function updateMetaDataIntoIntermediateFile(string $userId, int $id, stri
 
 		$intermediateMetaDataFile
 			->putContent($fileKey);
+
+		// To ease the wrap-up process during unlocking,
+		// we keep track of every folder for which metadata was updated.
+		// For that we create a file named /tokens/$token/$folderId.
+		if ($token !== null) {
+			try {
+				$tokenFolder = $this->appData->getFolder("/tokens/$token");
+			} catch (NotFoundException $ex) {
+				$tokenFolder = $this->appData->newFolder("/tokens/$token");
+			}
+			$tokenFolder->newFile("$id", '');
+		}
 	}
 
 	/**
@@ -308,4 +320,23 @@ protected function getLegacyOwnerPath(string $userId, int $id):string {
 
 		return $ownerNodes[0]->getPath();
 	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getTouchedFolders(string $token): array {
+		return array_map(
+			fn (ISimpleFile $file) => (int)$file->getName(),
+			$this->appData->getFolder("/tokens")->getFolder($token)->getDirectoryListing()
+		);
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function clearTouchedFolders(?string $token): void {
+		if ($token !== null) {
+			$this->appData->getFolder("/tokens/$token")->delete();
+		}
+	}
 }

lib/RollbackService.php

@@ -117,6 +117,8 @@ public function rollbackOlderThan(int $olderThanTimestamp, ?int $limit = null):
 				continue;
 			}
 
+			$this->metaDataStorage->clearTouchedFolders($lock->getToken());
+
 			$this->lockMapper->delete($lock);
 		}
 	}