add buildViewFlow and finishViewFlow methods to FormFlowTypeInterface

CHANGELOG.md

@@ -1,6 +1,10 @@
 CHANGELOG
 =========
 
+0.2.3
+-----
+ * Add `buildViewFlow()` and `finishViewFlow` methods to `FormFlowTypeInterface`
+
 0.2.2
 -----
  * Add `AbstractFlowButtonType` to simplify button type creation

src/Form/Flow/AbstractFlowType.php

@@ -4,6 +4,8 @@
 
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\Form\FormInterface;
+use Symfony\Component\Form\FormView;
 use Yceruto\FormFlowBundle\Form\Flow\Type\FormFlowType;
 
 abstract class AbstractFlowType extends AbstractType implements FormFlowTypeInterface
@@ -15,10 +17,32 @@ final public function buildForm(FormBuilderInterface $builder, array $options):
         $this->buildFormFlow($builder, $options);
     }
 
+    final public function buildView(FormView $view, FormInterface $form, array $options): void
+    {
+        \assert($form instanceof FormFlowInterface);
+
+        $this->buildViewFlow($view, $form, $options);
+    }
+
+    final public function finishView(FormView $view, FormInterface $form, array $options): void
+    {
+        \assert($form instanceof FormFlowInterface);
+
+        $this->finishViewFlow($view, $form, $options);
+    }
+
     public function buildFormFlow(FormFlowBuilderInterface $builder, array $options): void
     {
     }
 
+    public function buildViewFlow(FormView $view, FormFlowInterface $form, array $options): void
+    {
+    }
+
+    public function finishViewFlow(FormView $view, FormFlowInterface $form, array $options): void
+    {
+    }
+
     public function getParent(): string
     {
         return FormFlowType::class;

src/Form/Flow/FormFlowTypeInterface.php

@@ -3,11 +3,50 @@
 namespace Yceruto\FormFlowBundle\Form\Flow;
 
 use Symfony\Component\Form\FormTypeInterface;
+use Symfony\Component\Form\FormView;
 
 /**
  * A type that should be converted into a {@link FormFlow} instance.
  */
 interface FormFlowTypeInterface extends FormTypeInterface
 {
+    /**
+     * Builds the multistep form.
+     *
+     * This method is called for each multistep type. Type extensions can further
+     * modify the multistep form.
+     *
+     * @param array<string, mixed> $options
+     */
     public function buildFormFlow(FormFlowBuilderInterface $builder, array $options): void;
+
+    /**
+     * Builds the multistep form view.
+     *
+     * This method is called for each multistep type. Type extensions can further
+     * modify the view.
+     *
+     * A view of a multistep form is built before the views of the child forms are built.
+     * This means that you cannot access child views in this method. If you need
+     * to do so, move your logic to {@link finishViewFlow()} instead.
+     *
+     * @param array<string, mixed> $options
+     */
+    public function buildViewFlow(FormView $view, FormFlowInterface $form, array $options): void;
+
+    /**
+     * Finishes the multistep form view.
+     *
+     * This method gets called for each multistep type. Type extensions can further
+     * modify the view.
+     *
+     * When this method is called, views of the multistep form's children have already
+     * been built and finished and can be accessed. You should only implement
+     * such logic in this method that actually accesses child views. For everything
+     * else you are recommended to implement {@link buildViewFlow()} instead.
+     *
+     * @param array<string, mixed> $options
+     */
+    public function finishViewFlow(FormView $view, FormFlowInterface $form, array $options): void;
+
 }

src/Form/Flow/Type/FormFlowType.php

@@ -5,7 +5,6 @@
 use Symfony\Component\Form\Extension\Core\Type\FormType;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\FormEvents;
-use Symfony\Component\Form\FormInterface;
 use Symfony\Component\Form\FormView;
 use Symfony\Component\OptionsResolver\Exception\MissingOptionsException;
 use Symfony\Component\OptionsResolver\Options;
@@ -42,10 +41,8 @@ public function buildFormFlow(FormFlowBuilderInterface $builder, array $options)
         $builder->addEventListener(FormEvents::PRE_SUBMIT, $this->onPreSubmit(...), -100);
     }
 
-    public function buildView(FormView $view, FormInterface $form, array $options): void
+    public function buildViewFlow(FormView $view, FormFlowInterface $form, array $options): void
     {
-        \assert($form instanceof FormFlowInterface);
-
         $view->vars['cursor'] = $cursor = $form->getCursor();
 
         $index = 0;