From dd038ef42b3a61129505a5cf3c3326b8138c8cdf Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tim=20D=C3=BCsterhus?= <duesterhus@woltlab.com>
Date: Tue, 1 Dec 2020 15:48:12 +0100
Subject: [PATCH] Add TReauthenticationCheck

---
 .../TReauthenticationCheck.class.php          | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 wcfsetup/install/files/lib/system/user/authentication/TReauthenticationCheck.class.php

diff --git a/wcfsetup/install/files/lib/system/user/authentication/TReauthenticationCheck.class.php b/wcfsetup/install/files/lib/system/user/authentication/TReauthenticationCheck.class.php
new file mode 100644
index 0000000000..ef63bbafc2
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/user/authentication/TReauthenticationCheck.class.php
@@ -0,0 +1,32 @@
+<?php
+namespace wcf\system\user\authentication;
+use wcf\system\request\LinkHandler;
+use wcf\system\WCF;
+use wcf\util\HeaderUtil;
+
+/**
+ * Provides a method to check for reauthentication and redirect otherwise.
+ * 
+ * @author	Tim Duesterhus
+ * @copyright	2001-2020 WoltLab GmbH
+ * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @package	WoltLabSuite\Core\System\User\Authentication
+ * @since	5.4
+ */
+trait TReauthenticationCheck {
+	/**
+	 * If the current user is in the need for a reauthentication a redirect to
+	 * ReauthenticationForm is performed. After successful reauthentication the
+	 * user will return to the URL given as `$returnTo`.
+	 */
+	private function requestReauthentication(string $returnTo): void {
+		if (WCF::getSession()->needsReauthentication()) {
+			HeaderUtil::redirect(
+				LinkHandler::getInstance()->getLink('Reauthentication', [
+					'url' => $returnTo,
+				])
+			);
+			exit;
+		}
+	}
+}
-- 
2.20.1