fix(form_language): restrict languages to those known by GLPI

Author: btry

inc/form_language.class.php

@@ -111,18 +111,28 @@ public static function displayTabContentForItem(CommonGLPI $item, $tabnum = 1, $
    }
 
    public function prepareInputForAdd($input) {
+      global $CFG_GLPI;
+
       $formFk = PluginFormcreatorForm::getForeignKeyField();
       if (!isset($input['name'])) {
          Session::addMessageAfterRedirect(
-            __('The name cannot be empty!', 'formcreator'),
+            __('The name cannot be empty.', 'formcreator'),
             false,
             ERROR
          );
          return [];
       }
       if (!isset($input[$formFk])) {
          Session::addMessageAfterRedirect(
-            __('The language must be associated to a form!', 'formcreator'),
+            __('The language must be associated to a form.', 'formcreator'),
+            false,
+            ERROR
+         );
+         return [];
+      }
+      if (!isset($CFG_GLPI['languages'][$input['name']])) {
+         Session::addMessageAfterRedirect(
+            __('The specified language is not available.', 'formcreator'),
             false,
             ERROR
          );