feat: indicate reason for preloading notifications

Signed-off-by: Richard Steinmetz <richard@steinmetz.cloud>

Author: st3iny

lib/private/Notification/Manager.php

@@ -22,6 +22,7 @@
 use OCP\Notification\INotification;
 use OCP\Notification\INotifier;
 use OCP\Notification\IPreloadableNotifier;
+use OCP\Notification\NotificationPreloadReason;
 use OCP\Notification\UnknownNotificationException;
 use OCP\RichObjectStrings\IRichTextFormatter;
 use OCP\RichObjectStrings\IValidator;
@@ -391,14 +392,18 @@ public function prepare(INotification $notification, string $languageCode): INot
 		return $notification;
 	}
 
-	public function preloadDataForParsing(array $notifications, string $languageCode): void {
+	public function preloadDataForParsing(
+		array $notifications,
+		string $languageCode,
+		NotificationPreloadReason $reason,
+	): void {
 		$notifiers = $this->getNotifiers();
 		foreach ($notifiers as $notifier) {
 			if (!($notifier instanceof IPreloadableNotifier)) {
 				continue;
 			}
 
-			$notifier->preloadDataForParsing($notifications, $languageCode);
+			$notifier->preloadDataForParsing($notifications, $languageCode, $reason);
 		}
 	}
 

lib/public/Notification/IPreloadableNotifier.php

@@ -26,6 +26,11 @@ interface IPreloadableNotifier extends INotifier {
 	 *
 	 * @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.
+	 * @param NotificationPreloadReason $reason The reason for preloading the given notifications to facilitate smarter decisions about what data to preload.
 	 */
-	public function preloadDataForParsing(array $notifications, string $languageCode): void;
+	public function preloadDataForParsing(
+		array $notifications,
+		string $languageCode,
+		NotificationPreloadReason $reason,
+	): void;
 }

lib/public/Notification/NotificationPreloadReason.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCP\Notification;
+
+/**
+ * Indicates the reason for preloading notifications to facilitate smarter decisions about what data
+ * to preload.
+ *
+ * @since 32.0.0
+ */
+enum NotificationPreloadReason {
+	/**
+	 * Preparing a single notification for many users.
+	 *
+	 * @since 32.0.0
+	 */
+	case Push;
+
+	/**
+	 * Preparing many notifications for many users.
+	 *
+	 * @since 32.0.0
+	 */
+	case Email;
+
+	/**
+	 * Preparing many notifications for a single user.
+	 *
+	 * @since 32.0.0
+	 */
+	case EndpointController;
+}