access_policy-1.0.x-dev/src/AccessPolicyAccessControlHandler.php

<?php

namespace Drupal\access_policy;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Cache\Cache;
use Drupal\Core\Cache\CacheableDependencyInterface;
use Drupal\Core\Condition\ConditionAccessResolverTrait;
use Drupal\Core\Condition\ConditionManager;
use Drupal\Core\Entity\EntityAccessControlHandler;
use Drupal\Core\Entity\EntityHandlerInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Plugin\Context\ContextHandler;
use Drupal\Core\Plugin\Context\ContextRepositoryInterface;
use Drupal\Core\Session\AccountInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Access controller for the AccessPolicy entity.
 *
 * @see \Drupal\access_policy\Entity\AccessPolicy.
 */
class AccessPolicyAccessControlHandler extends EntityAccessControlHandler implements EntityHandlerInterface {

  use ConditionAccessResolverTrait;

  /**
   * The condition manager.
   *
   * @var \Drupal\Core\Condition\ConditionManager
   */
  protected $conditionManager;

  /**
   * The context handler.
   *
   * @var \Drupal\Core\Plugin\Context\ContextHandler
   */
  protected $contextHandler;

  /**
   * The context repository.
   *
   * @var \Drupal\Core\Plugin\Context\ContextRepositoryInterface
   */
  protected $contextRepository;

  /**
   * {@inheritdoc}
   */
  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
    return new static(
      $entity_type,
      $container->get('plugin.manager.condition'),
      $container->get('context.handler'),
      $container->get('context.repository')
    );
  }

  /**
   * AccessPolicyAccessControlHandler constructor.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type definition.
   * @param \Drupal\Core\Condition\ConditionManager $condition_manager
   *   The condition plugin manager.
   * @param \Drupal\Core\Plugin\Context\ContextHandler $context_handler
   *   The context handler.
   * @param \Drupal\Core\Plugin\Context\ContextRepositoryInterface $context_repository
   *   The context repository.
   */
  public function __construct(EntityTypeInterface $entity_type, ConditionManager $condition_manager, ContextHandler $context_handler, ContextRepositoryInterface $context_repository) {
    parent::__construct($entity_type);
    $this->conditionManager = $condition_manager;
    $this->contextHandler = $context_handler;
    $this->contextRepository = $context_repository;
  }

  /**
   * {@inheritdoc}
   */
  protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
    // If the access policy is required (such as with the "Me only" policy), do
    // not allow it to be deleted.
    return AccessResult::allowedIfHasPermission($account, 'administer access policy entities');
  }

  /**
   * Merges cacheable metadata from conditions onto the access result object.
   *
   * @param \Drupal\Core\Access\AccessResult $access
   *   The access result object.
   * @param \Drupal\Core\Condition\ConditionInterface[] $conditions
   *   List of conditions.
   */
  protected function mergeCacheabilityFromConditions(AccessResult $access, array $conditions) {
    foreach ($conditions as $condition) {
      if ($condition instanceof CacheableDependencyInterface) {
        $access->addCacheTags($condition->getCacheTags());
        $access->addCacheContexts($condition->getCacheContexts());
        $access->setCacheMaxAge(Cache::mergeMaxAges($access->getCacheMaxAge(), $condition->getCacheMaxAge()));
      }
    }
  }

  /**
   * {@inheritdoc}
   */
  protected function checkCreateAccess(AccountInterface $account, array $context, $entity_bundle = NULL) {
    return AccessResult::allowedIfHasPermission($account, 'administer access policy entities');
  }

}