fix small issues in relation to activities

lib/Service/ActivityService.php

@@ -86,7 +86,11 @@ public function publishActivityEvent(ActivityEvent $activityEvent, string $userI
 
 	public function getActivityMessage(ActivityEvent $event, string $language, bool $filtered = false) : string {
 		$this->l10n = $this->transFactory->get($event->getApp(), $language);
-		$this->userIsActor = $event->getAuthor() === $this->userSession->getUser()->getUID();
+		try {
+			$this->userIsActor = $event->getAuthor() === $this->userSession->getUser()->getUID();
+		} catch (\Exception $e) {
+			$this->userIsActor = false;
+		}
 		$this->eventType = $event->getType();
 		$parameters = $event->getSubjectParameters();
 		$this->shareType = $parameters['shareType']['name'] ?? '';

src/js/components/Activity/ActivityItem.vue

@@ -34,6 +34,7 @@ import moment from '@nextcloud/moment'
 import RichText from '@juliushaertl/vue-richtext'
 import { UserBubble } from '@nextcloud/vue'
 import SimpleLink from '../../helpers/SimpleLink'
+import GuestBubble from '../../helpers/GuestBubble'
 
 export default {
 	name: 'ActivityItem',
@@ -85,7 +86,7 @@ export default {
 					break
 				case 'guest':
 					parameters[key] = {
-						component: UserBubble,
+						component: GuestBubble,
 						props: {
 							user: parameters[key].id,
 							displayName: parameters[key].name,

src/js/helpers/GuestBubble.js

@@ -0,0 +1,43 @@
+/**
+ * @copyright Copyright (c) 2022 Rene Gieling <github@dartcafe.de>
+ *
+ * @author Rene Gieling <github@dartcafe.de>
+ *
+ * @license  AGPL-3.0-or-later
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+const GuestBubble = {
+	name: 'GuestBubble',
+	functional: true,
+
+	props: {
+		user: {
+			type: String,
+			default: '',
+		},
+		displayName: {
+			type: String,
+			default: '',
+		},
+	},
+
+	render(createElement, context) {
+		return createElement('span', context.props.displayName)
+	},
+}
+
+export default GuestBubble