FieldLayoutEntityLayoutEditForm.php

<?php

namespace Drupal\field_layout\Form;

use Drupal\Core\Entity\EntityFieldManagerInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a configuration form for configurable actions.
 */
class FieldLayoutEntityLayoutEditForm extends FormBase {

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

  /**
   * The entity field manager.
   *
   * @var \Drupal\Core\Entity\EntityFieldManagerInterface
   */
  protected $entityFieldManager;

  /**
   * ChangeLayoutForm constructor.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entityTypeManager
   *   The entity type manager.
   * @param \Drupal\Core\Entity\EntityFieldManagerInterface $entityFieldManager
   *   The entity field manager.
   */
  public function __construct(EntityTypeManagerInterface $entityTypeManager, EntityFieldManagerInterface $entityFieldManager) {
    $this->entityTypeManager = $entityTypeManager;
    $this->entityFieldManager = $entityFieldManager;
  }

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

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

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state, $entity_type = '', $bundle = '', $display_mode = '', $new_layout = '') {

    $old_layout = NULL;

    

    if (!empty($entity_type) && !empty($bundle) && !empty($display_mode)) {
      $display = entity_get_display($entity_type, $bundle, $display_mode);
      $entity = $this->getEntity();
      // $old_layout = $entity->s
    }

    // if ($old_layout) {

    //   $new_layout_key = $new_layout;
    //   $new_layout = $all_layouts[$new_layout];
    //   $old_layout_info = $all_layouts[$old_layout['layout']['id']];

    //   $form['#entity_type'] = $entity_type;
    //   $form['#entity_bundle'] = $bundle;
    //   $form['#mode'] = $display_mode;
    //   $form['#old_layout'] = $old_layout;
    //   $form['#old_layout_info'] = $old_layout_info;
    //   $form['#new_layout'] = $new_layout;
    //   $form['#new_layout_key'] = $new_layout_key;

    //   $form['info'] = [
    //     '#markup' => $this->t('You are changing from @old to @new layout for @bundle in @view_mode view mode.',
    //       [
    //         '@old' => $old_layout_info->getLabel(),
    //         '@new' => $new_layout->getLabel(),
    //         '@bundle' => $bundle,
    //         '@view_mode' => $display_mode,
    //       ]
    //     ),
    //     '#prefix' => "<div class='change-ds-layout-info'>",
    //     '#suffix' => "</div>",
    //   ];

    //   // Old region options.
    //   $regions = [];
    //   foreach ($old_layout_info->getRegions() as $key => $info) {
    //     $regions[$key] = $info['label'];
    //   }

    //   // Let other modules alter the regions.
    //   // For old regions.
    //   $context = [
    //     'entity_type' => $entity_type,
    //     'bundle' => $bundle,
    //     'view_mode' => $display_mode,
    //   ];
    //   $region_info = [
    //     'region_options' => $regions,
    //   ];
    //   \Drupal::moduleHandler()->alter('ds_layout_region', $context, $region_info);
    //   $regions = $region_info['region_options'];

    //   $save_regions = [];
    //   foreach ($regions as $key => $info) {
    //     $save_regions[$key] = [
    //       'label' => $info,
    //     ];
    //   }
    //   $form['#old_layout_info']->setRegions($save_regions);

    //   // For new regions.
    //   $new_regions = [];
    //   foreach ($new_layout->getRegions() as $key => $info) {
    //     $new_regions[$key] = $info['label'];
    //   }
    //   $region_info = [
    //     'region_options' => $new_regions,
    //   ];
    //   \Drupal::moduleHandler()->alter('ds_layout_region', $context, $region_info);
    //   $new_layout->setRegions($region_info['region_options']);

    //   // Display the region options.
    //   $selectable_regions = ['' => $this->t('- None -')] + $new_layout->getRegions();
    //   $form['regions_pre']['#markup'] = '<div class="ds-layout-regions">';
    //   foreach ($regions as $region => $region_title) {
    //     $form['region_' . $region] = [
    //       '#type' => 'container',
    //     ];
    //     $form['region_' . $region]['ds_label_' . $region] = [
    //       '#markup' => 'Fields in <span class="change-ds-layout-old-region"> ' . $region_title . '</span> go into',
    //     ];
    //     $form['region_' . $region]['ds_' . $region] = [
    //       '#type' => 'select',
    //       '#options' => $layout_options = $selectable_regions,
    //       '#default_value' => $region,
    //     ];
    //   }
    //   $form['regions_post']['#markup'] = '</div>';

    //   // Show previews from old and new layouts.
    //   $form['preview'] = [
    //     '#type' => 'container',
    //     '#prefix' => '<div class="ds-layout-preview">',
    //     '#suffix' => '</div>',
    //   ];

    //   $fallback_image = drupal_get_path('module', 'ds') . '/images/preview.png';
    //   $old_image = $old_layout_info->getIconPath() ?: $fallback_image;
    //   $new_image = $new_layout->getIconPath() ?: $fallback_image;
    //   $arrow = drupal_get_path('module', 'ds') . '/images/arrow.png';

    //   $form['preview']['old_layout'] = [
    //     '#markup' => '<div class="ds-layout-preview-image"><img src="' . base_path() . $old_image . '"/></div>',
    //   ];
    //   $form['preview']['arrow'] = [
    //     '#markup' => '<div class="ds-layout-preview-arrow"><img src="' . base_path() . $arrow . '"/></div>',
    //   ];
    //   $form['preview']['new_layout'] = [
    //     '#markup' => '<div class="ds-layout-preview-image"><img src="' . base_path() . $new_image . '"/></div>',
    //   ];
    //   $form['#attached']['library'][] = 'ds/admin';

    //   // Submit button.
    //   $form['actions'] = ['#type' => 'actions'];
    //   $form['actions']['submit'] = [
    //     '#type' => 'submit',
    //     '#value' => $this->t('Save'),
    //     '#prefix' => '<div class="ds-layout-change-save">',
    //     '#suffix' => '</div>',
    //   ];
    // }
    // else {
    //   $form['nothing'] = ['#markup' => $this->t('No valid configuration found.')];
    // }
    $form['#markup'] = "hello world";

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    // Prepare some variables.
    $old_layout = $form['#old_layout'];
    $new_layout = $form['#new_layout'];
    $old_layout_info = $form['#old_layout_info'];
    $new_layout_key = $form['#new_layout_key'];
    $entity_type = $form['#entity_type'];
    $bundle = $form['#entity_bundle'];
    $display_mode = $form['#mode'];

    // Create new third party settings.
    $third_party_settings = $old_layout;
    $third_party_settings['layout']['id'] = $new_layout_key;
    if ($library = $new_layout->getLibrary()) {
      $third_party_settings['layout']['library'] = $library;
    }
    unset($third_party_settings['regions']);

    // Map old regions to new ones.
    foreach ($old_layout_info->getRegions() as $region => $region_title) {
      $new_region = $form_state->getValue('ds_' . $region);
      if ($new_region != '' && isset($old_layout['regions'][$region])) {
        foreach ($old_layout['regions'][$region] as $field) {
          if (!isset($third_party_settings['regions'][$new_region])) {
            $third_party_settings['regions'][$new_region] = [];
          }
          $third_party_settings['regions'][$new_region][] = $field;
        }
      }
    }

    // Save configuration.
    /* @var $entity_display \Drupal\Core\Entity\Display\EntityDisplayInterface*/
    $entity_display = $this->entityTypeManager
      ->getStorage('entity_view_display')
      ->load($entity_type . '.' . $bundle . '.' . $display_mode);
    foreach (array_keys($third_party_settings) as $key) {
      $entity_display->setThirdPartySetting('ds', $key, $third_party_settings[$key]);
    }
    $entity_display->save();

    // Clear entity info cache.
    $this->entityFieldManager->clearCachedFieldDefinitions();

    // Show message.
    drupal_set_message(t('The layout change has been saved.'));
  }

}