fix: protect OpenAPI generation

Author: SMillerDev

src/PHPDraft/Out/OpenAPI/OpenApiRenderer.php

@@ -449,6 +449,9 @@ private function getSchemaProperty(BasicStructureElement|ElementStructureElement
       if ($value->type === 'enum') {
         $propery_data['type'] = in_array('nullable', $value->status, TRUE) ? [ $value->type, 'null' ] : $value->type;
         $options = [];
+        if (!is_iterable($value->value)) {
+            return $propery_data;
+        }
         foreach ($value->value->value as $option) {
             if ($option instanceof ElementStructureElement) {
                 $options[] = ['const' => $option->value, 'title' => $option->value];
@@ -457,18 +460,14 @@ private function getSchemaProperty(BasicStructureElement|ElementStructureElement
         $propery_data['oneOf'] = $options;
 
         return $propery_data;
-      }
-
-      if ($value->type === 'array') {
+      } elseif ($value->type === 'array') {
         $propery_data['type'] = array_unique(array_map(fn($item) => $item->type,$value->value->value));
         $propery_data['example'] = array_merge(array_filter(array_map(fn($item) => $item->value,$value->value->value)));
 
         return $propery_data;
-      }
-
-      if ($value->type === 'object') {
+      } elseif ($value->type === 'object') {
         $propery_data['type'] = $value->type;
-        $propery_data['properties'] = $this->getComponent($value->value)['properties'];
+        $propery_data['properties'] = $this->getComponent($value->value)['properties'] ?? (object) [];
 
         return $propery_data;
       }