BlockContentForm.php

<?php

namespace Drupal\block_content;

use Drupal\Component\Utility\Html;
use Drupal\Core\Entity\ContentEntityForm;
use Drupal\Core\Form\FormStateInterface;

/**
 * Form handler for the content block edit forms.
 *
 * @internal
 */
class BlockContentForm extends ContentEntityForm {

  /**
   * The block content entity.
   *
   * @var \Drupal\block_content\BlockContentInterface
   */
  protected $entity;

  /**
   * {@inheritdoc}
   */
  public function form(array $form, FormStateInterface $form_state) {
    $block = $this->entity;
    $form = parent::form($form, $form_state);
    if ($this->operation == 'edit') {
      $form['#title'] = $this
        ->t('Edit content block %label', [
        '%label' => $block
          ->label(),
      ]);
    }

    // Override the default CSS class name, since the user-defined content block
    // type name in 'TYPE-block-form' potentially clashes with third-party class
    // names.
    $form['#attributes']['class'][0] = 'block-' . Html::getClass($block
      ->bundle()) . '-form';
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  protected function actions(array $form, FormStateInterface $form_state) : array {
    $element = parent::actions($form, $form_state);
    if ($this
      ->getRequest()->query
      ->has('theme')) {
      $element['submit']['#value'] = $this
        ->t('Save and configure');
    }
    if ($this
      ->currentUser()
      ->hasPermission('administer blocks') && !$this
      ->getRequest()->query
      ->has('theme') && $this->entity
      ->isNew()) {
      $element['configure_block'] = [
        '#type' => 'submit',
        '#value' => $this
          ->t('Save and configure'),
        '#weight' => 20,
        '#submit' => array_merge($element['submit']['#submit'], [
          '::configureBlock',
        ]),
      ];
    }
    return $element;
  }

  /**
   * Form submission handler for the 'configureBlock' action.
   *
   * @param array $form
   *   An associative array containing the structure of the form.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   */
  public function configureBlock(array $form, FormStateInterface $form_state) : void {
    $block = $this->entity;
    if (!($theme = $block
      ->getTheme())) {
      $theme = $this
        ->config('system.theme')
        ->get('default');
    }
    $form_state
      ->setRedirect('block.admin_add', [
      'plugin_id' => 'block_content:' . $block
        ->uuid(),
      'theme' => $theme,
    ]);
    $form_state
      ->setIgnoreDestination();
  }

  /**
   * {@inheritdoc}
   */
  public function save(array $form, FormStateInterface $form_state) {
    $block = $this->entity;
    $insert = $block
      ->isNew();
    $block
      ->save();
    $context = [
      '@type' => $block
        ->bundle(),
      '%info' => $block
        ->label(),
    ];
    $logger = $this
      ->logger('block_content');
    $block_type = $this
      ->getBundleEntity();
    $t_args = [
      '@type' => $block_type
        ->label(),
      '%info' => $block
        ->label(),
    ];
    if ($insert) {
      $logger
        ->info('@type: added %info.', $context);
      $this
        ->messenger()
        ->addStatus($this
        ->t('@type %info has been created.', $t_args));
    }
    else {
      $logger
        ->info('@type: updated %info.', $context);
      $this
        ->messenger()
        ->addStatus($this
        ->t('@type %info has been updated.', $t_args));
    }
    if ($block
      ->id()) {
      $form_state
        ->setValue('id', $block
        ->id());
      $form_state
        ->set('id', $block
        ->id());
      $theme = $block
        ->getTheme();
      if ($insert && $theme) {
        $form_state
          ->setRedirect('block.admin_add', [
          'plugin_id' => 'block_content:' . $block
            ->uuid(),
          'theme' => $theme,
          'region' => $this
            ->getRequest()->query
            ->getString('region'),
        ]);
      }
      else {
        $form_state
          ->setRedirectUrl($block
          ->toUrl('collection'));
      }
    }
    else {

      // In the unlikely case something went wrong on save, the block will be
      // rebuilt and block form redisplayed.
      $this
        ->messenger()
        ->addError($this
        ->t('The block could not be saved.'));
      $form_state
        ->setRebuild();
    }
  }

}