AdminPathConfigEntityConverter.php

<?php

namespace Drupal\Core\ParamConverter;

use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Config\Entity\ConfigEntityInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Routing\AdminContext;
use Symfony\Component\Routing\Route;

/**
 * Makes sure the unmodified ConfigEntity is loaded on admin pages.
 *
 * Converts entity route arguments to unmodified entities as opposed to
 * converting to entities with overrides, such as the negotiated language.
 *
 * This converter applies only if the path is an admin path, the entity is
 * a config entity, and the "with_config_overrides" element is not set to TRUE
 * on the parameter definition.
 *
 * Due to this converter having a higher weight than the default
 * EntityConverter, every time this applies, it takes over the conversion duty
 * from EntityConverter. As we only allow a single converter per route
 * argument, EntityConverter is ignored when this converter applies.
 */
class AdminPathConfigEntityConverter extends EntityConverter {
    
    /**
     * The config factory.
     *
     * @var \Drupal\Core\Config\ConfigFactoryInterface
     */
    protected $configFactory;
    
    /**
     * The route admin context to determine whether a route is an admin one.
     *
     * @var \Drupal\Core\Routing\AdminContext
     */
    protected $adminContext;
    
    /**
     * Constructs a new EntityConverter.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
     *   The config factory.
     * @param \Drupal\Core\Routing\AdminContext $admin_context
     *   The route admin context service.
     * @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
     *   The entity repository.
     */
    public function __construct(EntityTypeManagerInterface $entity_type_manager, ConfigFactoryInterface $config_factory, AdminContext $admin_context, $entity_repository = NULL) {
        parent::__construct($entity_type_manager, $entity_repository);
        $this->configFactory = $config_factory;
        $this->adminContext = $admin_context;
    }
    
    /**
     * {@inheritdoc}
     */
    public function convert($value, $definition, $name, array $defaults) {
        $entity_type_id = $this->getEntityTypeFromDefaults($definition, $name, $defaults);
        // If the entity type is dynamic, confirm it to be a config entity. Static
        // entity types will have performed this check in self::applies().
        if (strpos($definition['type'], 'entity:{') === 0) {
            $entity_type = $this->entityTypeManager
                ->getDefinition($entity_type_id);
            if (!$entity_type->entityClassImplements(ConfigEntityInterface::class)) {
                return parent::convert($value, $definition, $name, $defaults);
            }
        }
        if ($storage = $this->entityTypeManager
            ->getStorage($entity_type_id)) {
            // Make sure no overrides are loaded.
            return $storage->loadOverrideFree($value);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function applies($definition, $name, Route $route) {
        if (isset($definition['with_config_overrides']) && $definition['with_config_overrides']) {
            return FALSE;
        }
        if (parent::applies($definition, $name, $route)) {
            $entity_type_id = substr($definition['type'], strlen('entity:'));
            // If the entity type is dynamic, defer checking to self::convert().
            if (strpos($entity_type_id, '{') === 0) {
                return TRUE;
            }
            // As we only want to override EntityConverter for ConfigEntities, find
            // out whether the current entity is a ConfigEntity.
            $entity_type = $this->entityTypeManager
                ->getDefinition($entity_type_id);
            if ($entity_type->entityClassImplements(ConfigEntityInterface::class)) {
                return $this->adminContext
                    ->isAdminRoute($route);
            }
        }
        return FALSE;
    }

}