contact.module

<?php


/**
 * @file
 */

use Drupal\Core\Form\FormStateInterface;

/**
 * Form submission handler for \Drupal\user\ProfileForm.
 *
 * Saves the contact page setting.
 */
function contact_user_profile_form_submit($form, FormStateInterface $form_state) : void {
  $account = $form_state->getFormObject()
    ->getEntity();
  if ($account->id() && $form_state->hasValue('contact')) {
    \Drupal::service('user.data')->set('contact', $account->id(), 'enabled', (int) $form_state->getValue('contact'));
  }
}

/**
 * Form submission handler for \Drupal\user\AccountSettingsForm.
 *
 * @see contact_form_user_admin_settings_alter()
 */
function contact_form_user_admin_settings_submit($form, FormStateInterface $form_state) : void {
  \Drupal::configFactory()->getEditable('contact.settings')
    ->set('user_default_enabled', $form_state->getValue('contact_default_status'))
    ->save();
}