Scaffold membership provider plugin

membership_provider_apple.info.yml

@@ -0,0 +1,7 @@
+name: App Store/iTunes Membership Provider
+type: module
+description: App Store/iTunes Membership Provider
+core_version_requirement: ^9
+package: Membership
+dependencies:
+  - membership:membership

src/Plugin/MembershipProvider/Apple.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\membership_provider_apple\Plugin\MembershipProvider;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\membership\Entity\MembershipInterface;
+use Drupal\membership\Plugin\MembershipProviderBase;
+
+/**
+ * Apple membership provider.
+ *
+ * @MembershipProvider(
+ *   id = "apple",
+ *   label = "iTunes Store/Apple",
+ * )
+ */
+final class Apple extends MembershipProviderBase {
+
+  /**
+   * @inheritDoc
+   */
+  public function postCreateMembership(MembershipInterface $membership, array $pluginValues = []): void {
+    // TODO: Implement postCreateMembership() method.
+  }
+
+  /**
+   * @inheritDoc
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    return $form;
+  }
+
+  /**
+   * @inheritDoc
+   */
+  public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
+    // TODO: Implement validateConfigurationForm() method.
+  }
+
+  /**
+   * @inheritDoc
+   */
+  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
+    // TODO: Implement submitConfigurationForm() method.
+  }
+
+}