contact_mail

contact_mail($key, &$message, $params)

function contact_mail($key, &$message, $params) {
  $contact_message = $params['contact_message'];
  /** @var $sender \Drupal\user\UserInterface */
  $sender = $params['sender'];
  $language = \Drupal::languageManager()->getLanguage($message['langcode']);

  $variables = array(
    '@site-name' => \Drupal::config('system.site')->get('name'),
    '@subject' => $contact_message->getSubject(),
    '@form' => !empty($params['contact_form']) ? $params['contact_form']->label() : NULL,
    '@form-url' => \Drupal::url('<current>', [], ['absolute' => TRUE, 'language' => $language]),
    '@sender-name' => $sender->getDisplayName(),
  );
  if ($sender->isAuthenticated()) {
    $variables['@sender-url'] = $sender->url('canonical', array('absolute' => TRUE, 'language' => $language));
  }
  else {
    $variables['@sender-url'] = $params['sender']->getEmail();
  }

  $options = array('langcode' => $language->getId());

  switch ($key) {
    case 'page_mail':
    case 'page_copy':
      $message['subject'] .= t('[@form] @subject', $variables, $options);
      $message['body'][] = t("@sender-name (@sender-url) sent a message using the contact form at @form-url.", $variables, $options);
      $build = entity_view($contact_message, 'mail');
      $message['body'][] = \Drupal::service('renderer')->renderPlain($build);
      break;

    case 'page_autoreply':
      $message['subject'] .= t('[@form] @subject', $variables, $options);
      $message['body'][] = $params['contact_form']->getReply();
      break;

    case 'user_mail':
    case 'user_copy':
      $variables += array(
        '@recipient-name' => $params['recipient']->getDisplayName(),
        '@recipient-edit-url' => $params['recipient']->url('edit-form', array('absolute' => TRUE, 'language' => $language)),
      );
      $message['subject'] .= t('[@site-name] @subject', $variables, $options);
      $message['body'][] = t('Hello @recipient-name,', $variables, $options);
      $message['body'][] = t("@sender-name (@sender-url) has sent you a message via your contact form at @site-name.", $variables, $options);
      $message['body'][] = t("If you don't want to receive such emails, you can change your settings at @recipient-edit-url.", $variables, $options);
      $build = entity_view($contact_message, 'mail');
      $message['body'][] = \Drupal::service('renderer')->renderPlain($build);
      break;
  }
}