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<?php
namespace Drupal\twig_tweak\View;
use Drupal\Core\Block\TitleBlockPluginInterface;
use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Controller\TitleResolverInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Symfony\Cmf\Component\Routing\RouteObjectInterface;
use Symfony\Component\HttpFoundation\RequestStack;
/**
* RegionViewBuilder service.
*/
class RegionViewBuilder {
/**
* The entity type manager.
*
* @var \Drupal\Core\Entity\EntityTypeManagerInterface
*/
protected $entityTypeManager;
/**
* The config factory.
*
* @var \Drupal\Core\Config\ConfigFactoryInterface
*/
protected $configFactory;
/**
* The request stack.
*
* @var \Symfony\Component\HttpFoundation\RequestStack
*/
protected $requestStack;
/**
* The title resolver.
*
* @var \Drupal\Core\Controller\TitleResolverInterface
*/
protected $titleResolver;
/**
* Constructs a RegionViewBuilder object.
*/
public function __construct(
EntityTypeManagerInterface $entity_type_manager,
ConfigFactoryInterface $config_factory,
RequestStack $request_stack,
TitleResolverInterface $title_resolver
) {
$this->entityTypeManager = $entity_type_manager;
$this->configFactory = $config_factory;
$this->requestStack = $request_stack;
$this->titleResolver = $title_resolver;
}
/**
* Builds the render array of a given region.
*
* @param string $region
* The region to build.
* @param string $theme
* (optional) The name of the theme to load the region. If it is not
* provided then default theme will be used.
*
* @return array
* A render array to display the region content.
*/
public function build(string $region, string $theme = NULL): array {
$blocks = $this->entityTypeManager->getStorage('block')->loadByProperties([
'region' => $region,
'theme' => $theme ?: $this->configFactory->get('system.theme')->get('default'),
]);
$view_builder = $this->entityTypeManager->getViewBuilder('block');
$build = [];
$cache_metadata = new CacheableMetadata();
/* @var $blocks \Drupal\block\BlockInterface[] */
foreach ($blocks as $id => $block) {
$access = $block->access('view', NULL, TRUE);
$cache_metadata = $cache_metadata->merge(CacheableMetadata::createFromObject($access));
if ($access->isAllowed()) {
$block_plugin = $block->getPlugin();
if ($block_plugin instanceof TitleBlockPluginInterface) {
$request = $this->requestStack->getCurrentRequest();
if ($route = $request->attributes->get(RouteObjectInterface::ROUTE_OBJECT)) {
$block_plugin->setTitle($this->titleResolver->getTitle($request, $route));
}
}
$build[$id] = $view_builder->view($block);
}
}
if ($build) {
$build['#region'] = $region;
$build['#theme_wrappers'] = ['region'];
$cache_metadata->applyTo($build);
}
return $build;
}
}