From 6c8281392b42ef40feebf7575e68716986f72f8f Mon Sep 17 00:00:00 2001
From: Marcel Werk <burntime@woltlab.com>
Date: Fri, 12 Feb 2021 13:35:03 +0100
Subject: [PATCH] Support guest users in UserFunctionTemplatePlugin

Closes #3989
---
 .../plugin/UserFunctionTemplatePlugin.class.php  | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/wcfsetup/install/files/lib/system/template/plugin/UserFunctionTemplatePlugin.class.php b/wcfsetup/install/files/lib/system/template/plugin/UserFunctionTemplatePlugin.class.php
index 3b5c4f8b98..dc9b42ef3f 100644
--- a/wcfsetup/install/files/lib/system/template/plugin/UserFunctionTemplatePlugin.class.php
+++ b/wcfsetup/install/files/lib/system/template/plugin/UserFunctionTemplatePlugin.class.php
@@ -74,12 +74,14 @@ class UserFunctionTemplatePlugin implements IFunctionTemplatePlugin
 
         // default case
         if ($content === '') {
-            $additionalParameters = ' data-object-id="' . $object->getObjectID() . '"';
             $content = $object->getFormattedUsername();
-            if (isset($tagArgs['class'])) {
-                $tagArgs['class'] = 'userLink ' . $tagArgs['class'];
-            } else {
-                $tagArgs['class'] = 'userLink';
+            if ($object->getObjectID()) {
+                $additionalParameters = ' data-object-id="' . $object->getObjectID() . '"';
+                if (isset($tagArgs['class'])) {
+                    $tagArgs['class'] = 'userLink ' . $tagArgs['class'];
+                } else {
+                    $tagArgs['class'] = 'userLink';
+                }
             }
         }
 
@@ -102,6 +104,10 @@ class UserFunctionTemplatePlugin implements IFunctionTemplatePlugin
                 . '="' . StringUtil::encodeHTML($value) . '"';
         }
 
+        if (!$object->getObjectID()) {
+            return '<span' . $additionalParameters . '>' . $content . '</span>';
+        }
+
         return '<a href="' . StringUtil::encodeHTML($object->getLink() . $append) . '"' . $additionalParameters . '>' . $content . '</a>';
     }
 }
-- 
2.20.1