localgov_services-2.1.19/src/Plugin/Block/ServicesBlockBase.php

<?php

namespace Drupal\localgov_services\Plugin\Block;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Cache\Cache;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Routing\CurrentRouteMatch;
use Drupal\Core\Session\AccountInterface;
use Drupal\node\NodeInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Service pages block base class.
 *
 * @package Drupal\localgov_services\Plugin\Block
 */
abstract class ServicesBlockBase extends BlockBase implements ContainerFactoryPluginInterface {

  /**
   * Service node instance.
   *
   * @var \Drupal\node\Entity\Node
   */
  protected $node = FALSE;

  /**
   * Route match service.
   *
   * @var \Drupal\Core\Routing\CurrentRouteMatch
   */
  protected $routeMatch;

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

  /**
   * Initialise new service page block instance.
   *
   * @param array $configuration
   *   The plugin configuration.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Routing\CurrentRouteMatch $route_match
   *   The route match service.
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager service.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, CurrentRouteMatch $route_match, EntityTypeManagerInterface $entity_type_manager) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);

    $this->routeMatch = $route_match;
    $this->entityTypeManager = $entity_type_manager;

    if ($this->routeMatch->getParameter('node')) {
      $this->node = $this->routeMatch->getParameter('node');
      if (!$this->node instanceof NodeInterface) {
        $node_storage = $this->entityTypeManager->getStorage('node');
        $this->node = $node_storage->load($this->node);
      }
    }
  }

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

  /**
   * {@inheritdoc}
   */
  protected function blockAccess(AccountInterface $account) {
    return AccessResult::allowedIf($this->node);
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheTags() {
    return Cache::mergeTags(parent::getCacheTags(), ['node:' . $this->node->id()]);
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheContexts() {
    return Cache::mergeContexts(parent::getCacheContexts(), ['route']);
  }

}