fix(comments): properly handle opening the sidebar when Activity integration is used

When the activity integration is used we need to open the `activity` tab
not the comments tab.

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

apps/comments/src/actions/inlineUnreadCommentsAction.ts

@@ -9,6 +9,7 @@ import CommentProcessingSvg from '@mdi/svg/svg/comment-processing.svg?raw'
 import { getSidebar } from '@nextcloud/files'
 import { n, t } from '@nextcloud/l10n'
 import logger from '../logger.js'
+import { isUsingActivityIntegration } from '../utils/activity.js'
 
 export const action: IFileAction = {
 	id: 'comments-unread',
@@ -38,7 +39,13 @@ export const action: IFileAction = {
 
 		try {
 			const sidebar = getSidebar()
-			sidebar.open(nodes[0], 'comments')
+			const sidebarTabId = isUsingActivityIntegration() ? 'activity' : 'comments'
+			if (sidebar.isOpen && sidebar.node?.source === nodes[0].source) {
+				logger.debug('Sidebar already open for this node, just activating comments tab')
+				sidebar.setActiveTab(sidebarTabId)
+				return null
+			}
+			sidebar.open(nodes[0], sidebarTabId)
 			return null
 		} catch (error) {
 			logger.error('Error while opening sidebar', { error })

apps/comments/src/files-sidebar.ts

@@ -1,4 +1,4 @@
-/**
+/*!
  * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
@@ -6,18 +6,18 @@
 import MessageReplyText from '@mdi/svg/svg/message-reply-text.svg?raw'
 import { getCSPNonce } from '@nextcloud/auth'
 import { registerSidebarTab } from '@nextcloud/files'
-import { loadState } from '@nextcloud/initial-state'
 import { t } from '@nextcloud/l10n'
 import wrap from '@vue/web-component-wrapper'
 import { createPinia, PiniaVuePlugin } from 'pinia'
 import Vue from 'vue'
 import { registerCommentsPlugins } from './comments-activity-tab.ts'
+import { isUsingActivityIntegration } from './utils/activity.ts'
 
 __webpack_nonce__ = getCSPNonce()
 
 const tagName = 'comments_files-sidebar-tab'
 
-if (loadState('comments', 'activityEnabled', false) && OCA?.Activity?.registerSidebarAction !== undefined) {
+if (isUsingActivityIntegration()) {
 	// Do not mount own tab but mount into activity
 	window.addEventListener('DOMContentLoaded', function() {
 		registerCommentsPlugins()

apps/comments/src/utils/activity.ts

@@ -0,0 +1,13 @@
+/*!
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import { loadState } from '@nextcloud/initial-state'
+
+/**
+ * Check if the comments app is using the Activity app integration for the sidebar.
+ */
+export function isUsingActivityIntegration() {
+	return loadState('comments', 'activityEnabled', false) && window.OCA?.Activity?.registerSidebarAction !== undefined
+}