Fix repeatable predefined fields

Author: AdrienClairembault

src/ITILTemplateField.php

@@ -54,6 +54,12 @@ abstract class ITILTemplateField extends CommonDBChild
     // From CommonDBTM
     public $dohistory = true;
 
+    public static function getMultiplePredefinedValues(): array
+    {
+        // List of fields that are allowed to be defined multiples times.
+        return [];
+    }
+
 
     public function getForbiddenStandardMassiveAction()
     {
@@ -183,6 +189,15 @@ public static function showForITILTemplate(ITILTemplate $tt, $withtemplate = 0)
             $used[$data['num']]        = $data['num'];
         }
 
+        // Remove fields that are allowed to have multiple values from the 'used'
+        // list.
+        $multiple = static::getMultiplePredefinedValues();
+        foreach ($multiple as $val) {
+            if (isset($used[$val])) {
+                unset($used[$val]);
+            }
+        }
+
         $fields_dropdown_values = [];
         foreach ($fields as $k => $field) {
             $fields_dropdown_values[$k] = $field;

src/ITILTemplatePredefinedField.php

@@ -202,7 +202,7 @@ public function getPredefinedFields($ID, $withtypeandcategory = false)
     /**
      * @since 0.85
      **/
-    public static function getMultiplePredefinedValues()
+    public static function getMultiplePredefinedValues(): array
     {
 
         $itil_class = static::$itiltype;