Add Boolean presenter for checkbox

app/Form/Data/FieldCollection.php

@@ -62,7 +62,10 @@ class FieldCollection extends Collection
      */
     public static function fromRequest(Form $form, array $input): self
     {
-        return $form->getFields()->each(fn ($field) => $field->value = array_key_exists($field->key, $input) ? $input[$field->key] : $field->default());
+        return $form->getFields()->map(function ($field) use ($input) {
+            $field->value = array_key_exists($field->key, $input) ? $input[$field->key] : $field->default();
+            return $field;
+        });
     }
 
     public function find(Field $givenField): ?Field

app/Form/Fields/CheckboxField.php

@@ -4,6 +4,8 @@ namespace App\Form\Fields;
 
 use App\Form\Models\Form;
 use App\Form\Models\Participant;
+use App\Form\Presenters\BooleanPresenter;
+use App\Form\Presenters\Presenter;
 use Faker\Generator;
 use Illuminate\Validation\Rule;
 
@@ -72,4 +74,9 @@ class CheckboxField extends Field
     public function afterRegistration(Form $form, Participant $participant, array $input): void
     {
     }
+
+    public function getPresenter(): Presenter
+    {
+        return app(BooleanPresenter::class);
+    }
 }

app/Form/Presenters/BooleanPresenter.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Form\Presenters;
+
+class BooleanPresenter extends Presenter
+{
+
+    /**
+     * @param mixed $value
+     */
+    public function present($value): string
+    {
+        return $value ? 'Ja' : 'Nein';
+    }
+}