Use JSON Forms rules in layouts

src/Form/Layout/AbstractLayoutArrayFactory.php

@@ -24,13 +24,20 @@
 use Assert\Assertion;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\json_forms\Form\AbstractConcreteFormArrayFactory;
+use Drupal\json_forms\Form\Control\Rule\StatesArrayFactoryInterface;
 use Drupal\json_forms\Form\FormArrayFactoryInterface;
 use Drupal\json_forms\JsonForms\Definition\Control\ControlDefinition;
 use Drupal\json_forms\JsonForms\Definition\DefinitionInterface;
 use Drupal\json_forms\JsonForms\Definition\Layout\LayoutDefinition;
 
 abstract class AbstractLayoutArrayFactory extends AbstractConcreteFormArrayFactory {
 
+  private StatesArrayFactoryInterface $statesArrayFactory;
+
+  public function __construct(StatesArrayFactoryInterface $statesArrayFactory) {
+    $this->statesArrayFactory = $statesArrayFactory;
+  }
+
   /**
    * {@inheritDoc}
    */
@@ -43,6 +50,10 @@ public function createFormArray(
     /** @var \Drupal\json_forms\JsonForms\Definition\Layout\LayoutDefinition $definition */
     $form = $this->createBasicFormArray($definition);
 
+    if (NULL !== $definition->getRule()) {
+      $form['#states'] = $this->statesArrayFactory->createStatesArray($definition->getRule());
+    }
+
     return array_merge($form, $this->createElementsFormArray($definition, $formState, $formArrayFactory));
   }
 

src/JsonForms/Definition/Layout/LayoutDefinition.php

@@ -67,6 +67,10 @@ public function getKeywordValue(string $keyword, $default = NULL) {
     return $this->layoutSchema->{$keyword} ?? $default;
   }
 
+  public function getRule(): ?\stdClass {
+    return $this->layoutSchema->rule ?? NULL;
+  }
+
   public function getType(): string {
     return $this->layoutSchema->type;
   }