fix: propagate group name changes

lib/AppInfo/Application.php

@@ -34,6 +34,7 @@
 use OCA\Circles\Listeners\Files\PreparingShareSendMail as ListenerFilesPreparingShareSendMail;
 use OCA\Circles\Listeners\Files\RemovingMember as ListenerFilesRemovingMember;
 use OCA\Circles\Listeners\Files\ShareCreatedSendMail as ListenerFilesShareCreatedSendMail;
+use OCA\Circles\Listeners\GroupChanged;
 use OCA\Circles\Listeners\GroupCreated;
 use OCA\Circles\Listeners\GroupDeleted;
 use OCA\Circles\Listeners\GroupMemberAdded;
@@ -52,6 +53,7 @@
 use OCP\AppFramework\Bootstrap\IBootstrap;
 use OCP\AppFramework\Bootstrap\IRegistrationContext;
 use OCP\Files\Config\IMountProviderCollection;
+use OCP\Group\Events\GroupChangedEvent;
 use OCP\Group\Events\GroupCreatedEvent;
 use OCP\Group\Events\GroupDeletedEvent;
 use OCP\Group\Events\UserAddedEvent;
@@ -98,6 +100,7 @@ public function register(IRegistrationContext $context): void {
 
 		// Group Events
 		$context->registerEventListener(GroupCreatedEvent::class, GroupCreated::class);
+		$context->registerEventListener(GroupChangedEvent::class, GroupChanged::class);
 		$context->registerEventListener(GroupDeletedEvent::class, GroupDeleted::class);
 		$context->registerEventListener(UserAddedEvent::class, GroupMemberAdded::class);
 		$context->registerEventListener(UserRemovedEvent::class, GroupMemberRemoved::class);

lib/Listeners/GroupChanged.php

@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Circles\Listeners;
+
+use OCA\Circles\Exceptions\CircleNotFoundException;
+use OCA\Circles\Service\CircleService;
+use OCA\Circles\Service\FederatedUserService;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Group\Events\GroupChangedEvent;
+use OCP\IUserSession;
+use Psr\Log\LoggerInterface;
+
+/** @template-implements IEventListener<GroupChangedEvent|Event> */
+class GroupChanged implements IEventListener {
+	public function __construct(
+		private readonly IUserSession $userSession,
+		private readonly FederatedUserService $federatedUserService,
+		private readonly CircleService $circleService,
+		private readonly LoggerInterface $logger,
+	) {
+	}
+
+	public function handle(Event $event): void {
+		if (!($event instanceof GroupChangedEvent)) {
+			return;
+		}
+
+		if ($event->getFeature() !== 'displayName') {
+			return;
+		}
+
+		$user = $this->userSession->getUser();
+		$this->federatedUserService->setLocalCurrentUser($user);
+
+		$groupId = $event->getGroup()->getGID();
+		try {
+			$this->circleService->updateName("group:$groupId", $event->getValue());
+		} catch (CircleNotFoundException $e) {
+			// Silently ignore (there is no circle for the group yet)
+		} catch (\Exception $e) {
+			$this->logger->warning("Failed to update display name of circle of group $groupId: " . $e->getMessage(), [
+				'exception' => $e,
+				'groupId' => $groupId,
+			]);
+		}
+	}
+}