FormTestHooks.php

<?php

declare (strict_types=1);
namespace Drupal\form_test\Hook;

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Hook\Attribute\Hook;

/**
 * Hook implementations for form_test.
 */
class FormTestHooks {
    
    /**
     * Implements hook_form_FORM_ID_alter().
     */
    public function blockFormFormTestAlterFormAlter(&$form, FormStateInterface $form_state) : void {
        \Drupal::messenger()->addStatus('block_form_form_test_alter_form_alter() executed.');
    }
    
    /**
     * Implements hook_form_alter().
     */
    public function formAlter(&$form, FormStateInterface $form_state, $form_id) : void {
        if ($form_id == 'form_test_alter_form') {
            \Drupal::messenger()->addStatus('form_test_form_alter() executed.');
        }
    }
    
    /**
     * Implements hook_form_FORM_ID_alter().
     */
    public function formFormTestAlterFormAlter(&$form, FormStateInterface $form_state) : void {
        \Drupal::messenger()->addStatus('form_test_form_form_test_alter_form_alter() executed.');
    }
    
    /**
     * Implements hook_form_FORM_ID_alter().
     */
    public function systemFormFormTestAlterFormAlter(&$form, FormStateInterface $form_state) : void {
        \Drupal::messenger()->addStatus('system_form_form_test_alter_form_alter() executed.');
    }
    
    /**
     * Implements hook_form_FORM_ID_alter() for the registration form.
     */
    public function formUserRegisterFormAlter(&$form, FormStateInterface $form_state) : void {
        $form['test_rebuild'] = [
            '#type' => 'submit',
            '#value' => t('Rebuild'),
            '#submit' => [
                'form_test_user_register_form_rebuild',
            ],
        ];
    }
    
    /**
     * Implements hook_form_FORM_ID_alter() for form_test_vertical_tabs_access_form().
     */
    public function formFormTestVerticalTabsAccessFormAlter(&$form, &$form_state, $form_id) : void {
        $form['vertical_tabs1']['#access'] = FALSE;
        $form['vertical_tabs2']['#access'] = FALSE;
        $form['tabs3']['#access'] = TRUE;
        $form['fieldset1']['#access'] = FALSE;
        $form['container']['#access'] = FALSE;
    }

}