From 4a287654b7c91a44f1ab92acd7389d5da199e3ec Mon Sep 17 00:00:00 2001
From: Eileen McNaughton <emcnaughton@wikimedia.org>
Date: Sat, 23 Sep 2023 10:48:59 +1200
Subject: [PATCH] Update Renderer::_tplFetch to work with Smarty3

---
 CRM/Core/Form/Renderer.php | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/CRM/Core/Form/Renderer.php b/CRM/Core/Form/Renderer.php
index 92e23e7a50..11f40d86ed 100644
--- a/CRM/Core/Form/Renderer.php
+++ b/CRM/Core/Form/Renderer.php
@@ -217,6 +217,34 @@ class CRM_Core_Form_Renderer extends HTML_QuickForm_Renderer_ArraySmarty {
     $element->updateAttributes($attributes);
   }
 
+  /**
+   * Process an template sourced in a string with Smarty
+   *
+   * This overrides the quick form function which has not been updated in a while.
+   *
+   * The function is called when render the code to mark a field as 'required'
+   *
+   * The notes on the quick form function seem to refer to older smarty - ie:
+   * Smarty has no core function to render a template given as a string.
+   * So we use the smarty eval plugin function to do this.
+   *
+   * @param string $tplSource The template source
+   */
+  public function _tplFetch($tplSource) {
+    // Smarty3 does not have this function defined so the parent fails.
+    // Adding this is preparatory to smarty 3....
+    if (!function_exists('smarty_function_eval') && !file_exists(SMARTY_DIR . '/plugins/function.eval.php')) {
+      $smarty = $this->_tpl;
+      $smarty->assign('var', $tplSource);
+      return $smarty->fetch("string:$tplSource");
+    }
+    // This part is what the parent does & is suitable to Smarty 2.
+    if (!function_exists('smarty_function_eval')) {
+      require SMARTY_DIR . '/plugins/function.eval.php';
+    }
+    return smarty_function_eval(['var' => $tplSource], $this->_tpl);
+  }
+
   /**
    * Convert IDs to values and format for display.
    *
-- 
2.25.1