mailjet-8.x-2.7/src/Form/SubsribeEmailForm.php

<?php

namespace Drupal\mailjet\Form;

use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\mailjet\MailjetApi;

/**
 *
 */
class SubsribeEmailForm extends ConfigFormBase
{

  /**
   *
   */
  public function getFormId() {
    return 'subscribe_admin_form';
  }//end getFormId()

  /**
   *
   */
  protected function getEditableConfigNames() {
    return ['config.subscribe_form'];
  }//end getEditableConfigNames()

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form = [];
    if (!empty($_GET['list'])) {
      $list_id = $_GET['list'];
    }
    if (!empty($_GET['sec_code'])) {
      $sec_code_email = base64_decode($_GET['sec_code']);
    }
    if (!empty($_GET['properties'])) {
      $properties = json_decode(base64_decode($_GET['properties']));
    }
    if (!empty($_GET['others'])) {
      $form_hidden_id = $_GET['others'];
    }
    else {
      return FALSE;
    }
    $signup_form      = mailjet_subscription_load($form_hidden_id);
    $contact = [
      'Email' => $sec_code_email,
      ];

    // If we have any properties we clean the `signup-` part from the name and prepare them to sync to Mailjet
    // Note that the `$properties` is Object not Array.
    if (!empty($properties)) {
      $propertiesClean = [];
      foreach ($properties as $key => $value) {
        if (stristr($key, 'signup-')) {
          $keyClean = str_ireplace('signup-', '', $key);
          switch (mailjet_get_propertiy_type($keyClean)) {
            case 'int':
              $propertiesClean[$keyClean] = (int) $value;
              break;

            case 'str':
              $propertiesClean[$keyClean] = (string) $value;
              break;

            case 'float':
              $propertiesClean[$keyClean] = (float) $value;
              break;

            case 'bool':
            case 'datetime':
              $propertiesClean[$keyClean] = $value;
              break;
          }
        }
      }
      $contact['Properties'] = $propertiesClean;
    }//end if

    // Add new email.
    $response = MailjetApi::syncMailjetContact($list_id, $contact);

    if ($response) {
      if (!empty($signup_form->success_message_subsribe)) {
        \Drupal::messenger()->addMessage(t($signup_form->success_message_subsribe), 'status');
      }
      else {
        \Drupal::messenger()->addMessage(t('You have successfully subscribed to Mailjet contact list! Thank you!'));
      }
    }

    return $form;
  }//end buildForm()

  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {
  }//end validateForm()

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
  }//end submitForm()

}//end class