fix: resolve file version conflict during restore

Signed-off-by: ailkiv <[email protected]>

lib/AppInfo/Application.php

@@ -11,6 +11,7 @@
 use OCA\Files\Event\LoadAdditionalScriptsEvent;
 use OCA\Files_Sharing\Event\BeforeTemplateRenderedEvent;
 use OCA\Text\Event\LoadEditor;
+use OCA\Text\Exception\DocumentHasUnsavedChangesException;
 use OCA\Text\Listeners\AddMissingIndicesListener;
 use OCA\Text\Listeners\BeforeAssistantNotificationListener;
 use OCA\Text\Listeners\BeforeNodeDeletedListener;
@@ -25,6 +26,7 @@
 use OCA\Text\Listeners\RegisterTemplateCreatorListener;
 use OCA\Text\Middleware\SessionMiddleware;
 use OCA\Text\Notification\Notifier;
+use OCA\Text\Service\DocumentService;
 use OCA\TpAssistant\Event\BeforeAssistantNotificationEvent;
 use OCA\Viewer\Event\LoadViewer;
 use OCP\AppFramework\App;
@@ -37,7 +39,11 @@
 use OCP\Files\Events\Node\BeforeNodeRenamedEvent;
 use OCP\Files\Events\Node\BeforeNodeWrittenEvent;
 use OCP\Files\Events\Node\NodeCopiedEvent;
+use OCP\Files\File;
+use OCP\Files\NotFoundException;
 use OCP\Files\Template\RegisterTemplateCreatorEvent;
+use OCP\Server;
+use OCP\Util;
 
 class Application extends App implements IBootstrap {
 	public const APP_NAME = 'text';
@@ -63,8 +69,28 @@ public function register(IRegistrationContext $context): void {
 
 		$context->registerNotifierService(Notifier::class);
 		$context->registerMiddleware(SessionMiddleware::class);
+
+		/** @psalm-suppress DeprecatedMethod */
+		Util::connectHook('\OCP\Versions', 'rollback', $this, 'resetSessionsAfterRestoreFile');
 	}
 
 	public function boot(IBootContext $context): void {
 	}
+
+	public function resetSessionsAfterRestoreFile(array $params): void {
+		$node = $params['node'];
+		if (!$node instanceof File) {
+			return;
+		}
+
+		$documentService = Server::get(DocumentService::class);
+		// Reset document session to avoid manual conflict resolution if there's no unsaved steps
+		try {
+			$documentService->resetDocument($node->getId());
+		} catch (DocumentHasUnsavedChangesException|NotFoundException $e) {
+			// Do not throw during event handling in this is expected to happen
+			// DocumentHasUnsavedChangesException: A document editing session is likely ongoing, someone can resolve the conflict
+			// NotFoundException: The event was called oin a file that was just created so a NonExistingFile object is used that has no id yet
+		}
+	}
 }