LayoutBuilderController.php

<?php

namespace Drupal\layout_builder\Controller;

use Drupal\Component\Assertion\Inspector;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\layout_builder\SectionStorageInterface;

/**
 * Defines a controller to provide the Layout Builder admin UI.
 *
 * @internal
 *   Controller classes are internal.
 */
class LayoutBuilderController {
    use StringTranslationTrait;
    
    /**
     * Provides a title callback.
     *
     * @param \Drupal\layout_builder\SectionStorageInterface $section_storage
     *   The section storage.
     *
     * @return string
     *   The title for the layout page.
     */
    public function title(SectionStorageInterface $section_storage) {
        assert(Inspector::assertStringable($section_storage->label()), 'Section storage label is expected to be a string.');
        return $this->t('Edit layout for %label', [
            '%label' => $section_storage->label() ?? $section_storage->getStorageType() . ' ' . $section_storage->getStorageId(),
        ]);
    }
    
    /**
     * Renders the Layout UI.
     *
     * @param \Drupal\layout_builder\SectionStorageInterface $section_storage
     *   The section storage.
     *
     * @return array
     *   A render array.
     */
    public function layout(SectionStorageInterface $section_storage) {
        return [
            '#type' => 'layout_builder',
            '#section_storage' => $section_storage,
        ];
    }

}