ws_small_y-1.0.x-dev/src/Form/SettingsForm.php

<?php

namespace Drupal\ws_small_y\Form;

use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Settings Form for Small Y.
 */
class SettingsForm extends ConfigFormBase {

  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;

  /**
   * SettingsForm constructor.
   *
   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
   *   The config factory.
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   */
  public function __construct(
    ConfigFactoryInterface $config_factory,
    EntityTypeManagerInterface $entity_type_manager,
  ) {
    parent::__construct($config_factory);
    $this->entityTypeManager = $entity_type_manager;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static(
      $container->get('config.factory'),
      $container->get('entity_type.manager'),
    );
  }

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'ws_small_y_admin_settings';
  }

  /**
   * {@inheritdoc}
   */
  protected function getEditableConfigNames() {
    return [
      'ws_small_y.settings',
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $config = $this->config('ws_small_y.settings');

    $form['main_navigation'] = [
      '#type' => 'details',
      '#title' => $this->t('Main navigation'),
      '#open' => TRUE,
    ];

    $menus = $this->entityTypeManager
      ->getStorage('menu')->loadByProperties();
    $options = [];
    foreach ($menus as $menu_id => $menu) {
      $options[$menu_id] = $menu->label();
    }

    $form['main_navigation']['main_menu'] = [
      '#type' => 'select',
      '#options' => $options,
      '#required' => TRUE,
      '#title' => $this->t('Available menus'),
      '#default_value' => $config->get('main_menu'),
      '#description' => $this->t('Please select a menu you want to use as a main navigation.'),
    ];

    return parent::buildForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $config = $this->config('ws_small_y.settings');
    $config->set('main_menu', $form_state->getValue('main_menu'));
    $config->save();
    parent::submitForm($form, $form_state);
  }

}