From 06dad6051ed45f9041aa573b69c87dde568976e3 Mon Sep 17 00:00:00 2001
From: Eileen McNaughton <emcnaughton@wikimedia.org>
Date: Sat, 23 Sep 2023 13:30:23 +1200
Subject: [PATCH] Add instance of smarty modifier to prevent errors when
 running smarty 3

---
 CRM/Core/Smarty/plugins/modifier.smarty.php | 45 +++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 CRM/Core/Smarty/plugins/modifier.smarty.php

diff --git a/CRM/Core/Smarty/plugins/modifier.smarty.php b/CRM/Core/Smarty/plugins/modifier.smarty.php
new file mode 100644
index 0000000000..000e87ecf3
--- /dev/null
+++ b/CRM/Core/Smarty/plugins/modifier.smarty.php
@@ -0,0 +1,45 @@
+<?php
+/*
+ +--------------------------------------------------------------------+
+ | Copyright CiviCRM LLC. All rights reserved.                        |
+ |                                                                    |
+ | This work is published under the GNU AGPLv3 license with some      |
+ | permitted exceptions and without any warranty. For full license    |
+ | and copyright information, see https://civicrm.org/licensing       |
+ +--------------------------------------------------------------------+
+ */
+
+/**
+ *
+ * @package CRM
+ * @copyright CiviCRM LLC https://civicrm.org/licensing
+ */
+
+/**
+ * Implement smarty:nodefaults for Smarty3.
+ *
+ * Adding |smarty:nodefaults to strings is the smarty
+ * v2 way to indicates that a string should not be escaped.
+ * It doesn't work with smarty 3 but it is a useful way to make strings
+ * findable for this purpose as we figure out the best way for smarty 3.
+ *
+ * As a bridging mechanism this ensures the modifiers added in v2 do not error in v3.
+ *
+ * Eventually we want to run v3/v4 to escape by default but we are deferring that challenge
+ * until we have achieved the first set of upgrading to v3.
+ *
+ * @param string $string
+ *   The html to be tweaked.
+ * @param string $modifier
+ *   Either nodefaults or nothing
+ *
+ * @return string
+ *   the new modified html string
+ */
+function smarty_modifier_smarty($string, string $modifier) {
+  if ($modifier === 'nodefaults') {
+    return $string;
+  }
+  // For clarity - we don't do this.
+  throw new CRM_Core_Exception('unsupported modifier');
+}
-- 
2.25.1