ContactFormHooks.php

<?php

namespace Drupal\contact\Hook;

use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Hook\Attribute\FormAlter;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\user\UserDataInterface;

/**
 * Form hook implementations for Contact module.
 */
class ContactFormHooks {
    use StringTranslationTrait;
    public function __construct(AccountInterface $currentUser, UserDataInterface $userData, configFactoryInterface $configFactory) {
    }
    
    /**
     * Implements hook_form_FORM_ID_alter() for \Drupal\user\ProfileForm.
     *
     * Add the enable personal contact form to an individual user's account page.
     *
     * @see \Drupal\user\ProfileForm::form()
     */
    public function formUserFormAlter(&$form, FormStateInterface $form_state) : void {
        $form['contact'] = [
            '#type' => 'details',
            '#title' => $this->t('Contact settings'),
            '#open' => TRUE,
            '#weight' => 5,
        ];
        $account = $form_state->getFormObject()
            ->getEntity();
        if (!$this->currentUser
            ->isAnonymous() && $account->id()) {
            $account_data = $this->userData
                ->get('contact', $account->id(), 'enabled');
        }
        $form['contact']['contact'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Personal contact form'),
            '#default_value' => $account_data ?? $this->configFactory
                ->getEditable('contact.settings')
                ->get('user_default_enabled'),
            '#description' => $this->t('Allow other users to contact you via a personal contact form which keeps your email address hidden. Note that some privileged users such as site administrators are still able to contact you even if you choose to disable this feature.'),
        ];
        $form['actions']['submit']['#submit'][] = 'contact_user_profile_form_submit';
    }
    
    /**
     * Implements hook_form_FORM_ID_alter() for \Drupal\user\AccountSettingsForm.
     *
     * Adds the default personal contact setting on the user settings page.
     */
    public function formUserAdminSettingsAlter(&$form, FormStateInterface $form_state) : void {
        $form['contact'] = [
            '#type' => 'details',
            '#title' => $this->t('Contact settings'),
            '#open' => TRUE,
            '#weight' => 0,
        ];
        $form['contact']['contact_default_status'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Enable the personal contact form by default for new users'),
            '#description' => $this->t('Changing this setting will not affect existing users.'),
            '#default_value' => $this->configFactory
                ->getEditable('contact.settings')
                ->get('user_default_enabled'),
        ];
        // Add submit handler to save contact configuration.
        $form['#submit'][] = 'contact_form_user_admin_settings_submit';
    }

}