4 files changed, 38 insertions, 1 deletions
diff --git a/lib/public/Notification/IManager.php b/lib/public/Notification/IManager.php
index 23664af17cd..207a89344b0 100644
--- a/lib/public/Notification/IManager.php
+++ b/lib/public/Notification/IManager.php
@@ -11,7 +11,7 @@ namespace OCP\Notification;
 use OCP\AppFramework\Attribute\Consumable;
 
 #[Consumable(since: '9.0.0')]
-interface IManager extends IApp, INotifier {
+interface IManager extends IApp, IPreloadableNotifier {
 	/**
 	 * @param string $appClass The service must implement IApp, otherwise a
 	 *                         \InvalidArgumentException is thrown later
diff --git a/lib/public/Notification/INotifier.php b/lib/public/Notification/INotifier.php
index bdc7207216f..b6851e3dfb3 100644
--- a/lib/public/Notification/INotifier.php
+++ b/lib/public/Notification/INotifier.php
@@ -10,6 +10,11 @@ namespace OCP\Notification;
 
 use OCP\AppFramework\Attribute\Implementable;
 
+/**
+ * Please consider implementing {@see IPreloadableNotifier} to improve performance. It allows to
+ * preload and cache data for many notifications at once instead of loading the data for each
+ * prepared notification separately.
+ */
 #[Implementable(since: '9.0.0')]
 interface INotifier {
 	/**
diff --git a/lib/public/Notification/IPreloadableNotifier.php b/lib/public/Notification/IPreloadableNotifier.php
new file mode 100644
index 00000000000..2bdcd84d254
--- /dev/null
+++ b/lib/public/Notification/IPreloadableNotifier.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCP\Notification;
+
+use OCP\AppFramework\Attribute\Implementable;
+
+/**
+ * Allow notifier implementations to preload and cache data for many notifications at once to
+ * improve performance by, for example, bundling SQL queries.
+ */
+#[Implementable(since: '32.0.0')]
+interface IPreloadableNotifier extends INotifier {
+	/**
+	 * This method provides a way for notifier implementations to preload and cache data for many
+	 * notifications. The data is meant to be consumed later in the {@see INotifier::prepare()}
+	 * method to improve performance.
+	 *
+	 * @since 32.0.0
+	 *
+	 * @param INotification[] $notifications The notifications which are about to be prepared in the next step.
+	 * @param string $languageCode The code of the language that should be used to prepare the notification.
+	 */
+	public function preloadDataForParsing(array $notifications, string $languageCode): void;
+}
diff --git a/lib/public/TaskProcessing/IManager.php b/lib/public/TaskProcessing/IManager.php
index f161030f5f4..723eca8f615 100644
--- a/lib/public/TaskProcessing/IManager.php
+++ b/lib/public/TaskProcessing/IManager.php
@@ -26,6 +26,7 @@ use OCP\TaskProcessing\Exception\ValidationException;
  * @since 30.0.0
  */
 interface IManager {
+
 	/**
 	 * @since 30.0.0
 	 */