fix: create custom temp directory for html purify serializer (openemr…

…#7521)

* fix: create custom temp directory for html purify serializer

* make subdir in temporary_files_dir

* use constant instead of slash

* log mkdir error

src/Services/DocumentTemplates/DocumentTemplateRender.php

@@ -22,6 +22,7 @@
 use HTMLPurifier;
 use HTMLPurifier_Config;
 use RuntimeException;
+use OpenEMR\Common\Logging\SystemLogger;
 use OpenEMR\Services\VersionService;
 
 require_once($GLOBALS['srcdir'] . '/appointments.inc.php');
@@ -109,7 +110,16 @@ public function doRender($template_id, $template_content = null, $json_data = nu
         // purify html (and remove js)
         $isLegacy = stripos($template, 'portal_version') === false;
         $config = HTMLPurifier_Config::createDefault();
-        $config->set('Cache.SerializerPath', $GLOBALS['temporary_files_dir']);
+        $purifyTempFile = $GLOBALS['temporary_files_dir'] . DIRECTORY_SEPARATOR . 'htmlpurifier';
+        if (
+            !file_exists($purifyTempFile) &&
+            !is_dir($purifyTempFile)
+        ) {
+            if (!mkdir($purifyTempFile)) {
+                (new SystemLogger())->error("Could not create directory ", [$purifyTempFile]);
+            }
+        }
+        $config->set('Cache.SerializerPath', $purifyTempFile);
         $config->set('Core.Encoding', 'UTF-8');
         $config->set('CSS.AllowedProperties', '*');
         $purify = new HTMLPurifier($config);