ImageStyleFlushForm.php

<?php

namespace Drupal\image\Form;

use Drupal\Core\Entity\EntityConfirmFormBase;
use Drupal\Core\Form\FormStateInterface;

/**
 * Form controller for image style flush.
 *
 * @internal
 */
class ImageStyleFlushForm extends EntityConfirmFormBase {

  /**
   * {@inheritdoc}
   */
  public function getQuestion() {
    return $this
      ->t('Are you sure you want to apply the updated %name image effect to all images?', [
      '%name' => $this->entity
        ->label(),
    ]);
  }

  /**
   * {@inheritdoc}
   */
  public function getDescription() {
    return $this
      ->t('This operation does not change the original images but the copies created for this style will be recreated.');
  }

  /**
   * {@inheritdoc}
   */
  public function getConfirmText() {
    return $this
      ->t('Flush');
  }

  /**
   * {@inheritdoc}
   */
  public function getCancelUrl() {
    return $this->entity
      ->toUrl('collection');
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $this->entity
      ->flush();
    $this
      ->messenger()
      ->addStatus($this
      ->t('The image style %name has been flushed.', [
      '%name' => $this->entity
        ->label(),
    ]));
    $form_state
      ->setRedirectUrl($this
      ->getCancelUrl());
  }

}