contacts_events-8.x-1.x-dev/src/Form/AdminPaymentEmailFormAlter.php

<?php

namespace Drupal\contacts_events\Form;

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\StringTranslation\TranslatableMarkup;

/**
 * Form alter handler to add email confirmation to admin payment forms.
 */
class AdminPaymentEmailFormAlter {

  use StringTranslationTrait;

  /**
   * Form alter for the commerce payment form.
   *
   * @param array $form
   *   The form array.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The form state.
   */
  public function alter(array &$form, FormStateInterface $form_state) : void {
    $state_storage = $form_state->getStorage();
    if (isset($state_storage['step']) && $state_storage['step'] == 'payment') {
      /** @var \Drupal\commerce_payment\Entity\PaymentInterface $payment */
      $payment = $form['payment']['#inline_form']->getEntity();

      if (!isset($form['actions']['#weight'])) {
        $form['actions']['#weight'] = 10;
      }

      $form['send_confirmation'] = [
        '#type' => 'fieldset',
        '#title' => $this->t('Confirmation'),
        '#weight' => $form['actions']['#weight'] - 1,
        'send' => [
          '#type' => 'checkbox',
          '#title' => $this->t('Send payment confirmation'),
        ],
        'send_to' => [
          '#type' => 'email',
          '#title' => $this->t('Send confirmation to'),
          '#default_value' => $payment->getOrder()->get('mail')->value,
          '#states' => [
            'visible' => [
              ':input[name="send_confirmation[send]"]' => ['checked' => TRUE],
            ],
          ],
        ],
      ];

      $form['#validate'][] = [self::class, 'validateForm'];
      $form['#submit'][] = [self::class, 'submitForm'];
    }
  }

  /**
   * Validation handler for admin payment email notification.
   *
   * @param array $form
   *   The form being submitted.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The state of the form.
   */
  public static function validateForm(array &$form, FormStateInterface $form_state) : void {
    // phpcs:ignore Drupal.Arrays.Array.LongLineDeclaration
    if ($form_state->getValue(['send_confirmation', 'send']) && empty($form_state->getValue(['send_confirmation', 'send_to']))) {
      $form_state->setError($form['send_confirmation']['send_to'], new TranslatableMarkup('Confirmation email address is required to send a confirmation email.'));
    }
  }

  /**
   * Submission handler for admin payment email notification.
   *
   * @param array $form
   *   The form being submitted.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The state of the form.
   */
  public static function submitForm(array &$form, FormStateInterface $form_state) : void {
    if ($form_state->getValue(['send_confirmation', 'send'])) {
      $send_to = $form_state->getValue(['send_confirmation', 'send_to']);
      $payment = $form['payment']['#inline_form']->getEntity();
      \Drupal::service('contacts_events.admin_payment_email_service')->sendToPayer($payment, $send_to);
    }
  }

}