LazyBuilders.php

<?php

declare (strict_types=1);
namespace Drupal\announcements_feed;

use Drupal\Component\Serialization\Json;
use Drupal\Component\Utility\Html;
use Drupal\Core\Render\ElementInfoManagerInterface;
use Drupal\Core\Security\TrustedCallbackInterface;
use Drupal\Core\Url;

/**
 * Defines a class for lazy building render arrays.
 *
 * @internal
 */
final class LazyBuilders implements TrustedCallbackInterface {
    
    /**
     * Constructs LazyBuilders object.
     *
     * @param \Drupal\Core\Render\ElementInfoManagerInterface $elementInfo
     *   Element info.
     */
    public function __construct(ElementInfoManagerInterface $elementInfo) {
    }
    
    /**
     * Render announcements.
     *
     * @return array
     *   Render array.
     */
    public function renderAnnouncements() : array {
        $build = [
            '#type' => 'link',
            '#cache' => [
                'context' => [
                    'user.permissions',
                ],
            ],
            '#title' => t('Announcements'),
            '#url' => Url::fromRoute('announcements_feed.announcement'),
            '#id' => Html::getId('toolbar-item-announcement'),
            '#attributes' => [
                'title' => t('Announcements'),
                'data-drupal-announce-trigger' => '',
                'class' => [
                    'toolbar-icon',
                    'toolbar-item',
                    'toolbar-icon-announce',
                    'use-ajax',
                    'announce-canvas-link',
                    'announce-default',
                ],
                'data-dialog-renderer' => 'off_canvas',
                'data-dialog-type' => 'dialog',
                'data-dialog-options' => Json::encode([
                    'announce' => TRUE,
                    'width' => '25%',
                    'classes' => [
                        'ui-dialog' => 'announce-dialog',
                        'ui-dialog-titlebar' => 'announce-titlebar',
                        'ui-dialog-title' => 'announce-title',
                        'ui-dialog-titlebar-close' => 'announce-close',
                        'ui-dialog-content' => 'announce-body',
                    ],
                ]),
            ],
            '#attached' => [
                'library' => [
                    'announcements_feed/drupal.announcements_feed.toolbar',
                ],
            ],
        ];
        // The renderer has already added element defaults by the time the lazy
        // builder is run.
        // @see https://www.drupal.org/project/drupal/issues/2609250
        $build += $this->elementInfo
            ->getInfo('link');
        return $build;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function trustedCallbacks() : array {
        return [
            'renderAnnouncements',
        ];
    }

}