Add an age verification tab on the product edit page

src/EventSubscriber/Admin/AddAgeVerificationTabSubscriber.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusAgeVerificationPlugin\EventSubscriber\Admin;
+
+use Sylius\Bundle\AdminBundle\Event\ProductMenuBuilderEvent;
+use Sylius\Bundle\AdminBundle\Menu\ProductFormMenuBuilder;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+final class AddAgeVerificationTabSubscriber implements EventSubscriberInterface
+{
+    public static function getSubscribedEvents(): array
+    {
+        return [
+            ProductFormMenuBuilder::EVENT_NAME => 'addTab',
+        ];
+    }
+
+    public function addTab(ProductMenuBuilderEvent $event): void
+    {
+        $event->getMenu()
+            ->addChild('age_verification')
+            ->setAttribute('template', '@SetonoSyliusAgeVerificationPlugin/admin/product/tab/_age_verification.html.twig')
+            ->setLabel('setono_sylius_age_verification.ui.age_verification')
+        ;
+    }
+}

src/Form/Extension/ProductTypeExtension.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusAgeVerificationPlugin\Form\Extension;
+
+use Sylius\Bundle\ProductBundle\Form\Type\ProductType;
+use Symfony\Component\Form\AbstractTypeExtension;
+use Symfony\Component\Form\Extension\Core\Type\IntegerType;
+use Symfony\Component\Form\FormBuilderInterface;
+
+final class ProductTypeExtension extends AbstractTypeExtension
+{
+    public function buildForm(FormBuilderInterface $builder, array $options): void
+    {
+        $builder->add('minimumAge', IntegerType::class, [
+            'label' => 'setono_sylius_age_verification.form.product.minimum_age',
+            'required' => false,
+        ]);
+    }
+
+    public static function getExtendedTypes(): \Generator
+    {
+        yield ProductType::class;
+    }
+}

src/Resources/config/services.xml

@@ -2,6 +2,12 @@
 <container xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://symfony.com/schema/dic/services"
            xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
     <services>
-        <!-- Put your services here -->
+        <service id="Setono\SyliusAgeVerificationPlugin\Form\Extension\ProductTypeExtension">
+            <tag name="form.type_extension"/>
+        </service>
+
+        <service id="Setono\SyliusAgeVerificationPlugin\EventSubscriber\Admin\AddAgeVerificationTabSubscriber">
+            <tag name="kernel.event_subscriber"/>
+        </service>
     </services>
 </container>

src/Resources/translations/messages.en.yaml

@@ -0,0 +1,6 @@
+setono_sylius_age_verification:
+    form:
+        product:
+            minimum_age: Minimum age
+    ui:
+        age_verification: Age verification

src/Resources/views/admin/product/tab/_age_verification.html.twig

@@ -0,0 +1,7 @@
+<div class="ui tab" data-tab="age_verification">
+    <h3 class="ui top attached header">{{ 'setono_sylius_age_verification.ui.age_verification'|trans }}</h3>
+
+    <div class="ui attached segment">
+        {{ form_row(form.minimumAge) }}
+    </div>
+</div>