Analyze.php

<?php

namespace Drupal\views_ui\Form\Ajax;

use Drupal\Core\Form\FormStateInterface;
use Drupal\views\Views;

/**
 * Displays analysis information for a view.
 *
 * @internal
 */
class Analyze extends ViewsFormBase {

  /**
   * {@inheritdoc}
   */
  public function getFormKey() {
    return 'analyze';
  }

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

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $view = $form_state
      ->get('view');
    $form['#title'] = $this
      ->t('View analysis');
    $form['#section'] = 'analyze';
    $analyzer = Views::analyzer();
    $messages = $analyzer
      ->getMessages($view
      ->getExecutable());
    $form['analysis'] = [
      '#prefix' => '<div class="js-form-item form-item">',
      '#suffix' => '</div>',
      '#markup' => $analyzer
        ->formatMessages($messages),
    ];

    // Inform the standard button function that we want an OK button.
    $form_state
      ->set('ok_button', TRUE);
    $view
      ->getStandardButtons($form, $form_state, 'views_ui_analyze_view_form');
    return $form;
  }

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

    /** @var \Drupal\views_ui\ViewUI $view */
    $view = $form_state
      ->get('view');
    $form_state
      ->setRedirectUrl($view
      ->toUrl('edit-form'));
  }

}