jfu-1.0.x-dev/modules/jfu_usage/src/Form/JfuUsageSettingsForm.php

<?php

namespace Drupal\jfu_usage\Form;

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

/**
 *
 * @package Drupal\jfu_usage\Form
 */
class JfuUsageSettingsForm extends ConfigFormBase {

  /**
   * Constructs a JfuUsageSettingsForm object.
   *
   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
   *   The factory for configuration objects.
   */
  public function __construct(ConfigFactoryInterface $config_factory) {
    parent::__construct($config_factory);
  }

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

  /**
   * {@inheritDoc}
   */
  public function getFormId() {
    return 'jfu_usage_settings';
  }

  /**
   * {@inheritDoc}
   */
  public function getEditableConfigNames() {
    return ['jfu_usage.settings'];
  }

  /**
   * {@inheritDoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $config_jfu_usage = $this->config('jfu_usage.settings');
    $rows_per_page = $config_jfu_usage->get('rows_per_page');
    $form['rows_per_page'] = [
      '#type' => 'number',
      '#title' => $this->t('Rows per page'),
      '#min' => 50,
      '#max' => 200,
      '#default_value' => isset($rows_per_page) ? $rows_per_page : '',
      '#description' => $this->t('Sets the number of items for component pagination usage.'),
    ];

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

  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {
    parent::validateForm($form, $form_state);
  }

  /**
  * {@inheritdoc}
  */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    parent::submitForm($form, $form_state);

    $this->config('jfu_usage.settings')
      ->set('rows_per_page', $form_state->getValue('rows_per_page'))
      ->save();

    parent::submitForm($form, $form_state);
  }

}