ContentTranslationOverviewAccess.php

<?php

namespace Drupal\content_translation\Access;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Routing\Access\AccessInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Session\AccountInterface;

/**
 * Access check for entity translation overview.
 */
class ContentTranslationOverviewAccess implements AccessInterface {
    
    /**
     * The entity type manager service.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * Constructs a ContentTranslationOverviewAccess object.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager service.
     */
    public function __construct(EntityTypeManagerInterface $entity_type_manager) {
        $this->entityTypeManager = $entity_type_manager;
    }
    
    /**
     * Checks access to the translation overview for the entity and bundle.
     *
     * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
     *   The parametrized route.
     * @param \Drupal\Core\Session\AccountInterface $account
     *   The currently logged in account.
     * @param string $entity_type_id
     *   The entity type ID.
     *
     * @return \Drupal\Core\Access\AccessResultInterface
     *   The access result.
     */
    public function access(RouteMatchInterface $route_match, AccountInterface $account, $entity_type_id) {
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        $entity = $route_match->getParameter($entity_type_id);
        if ($entity && $entity->isTranslatable()) {
            // Get entity base info.
            $bundle = $entity->bundle();
            // Get entity access callback.
            $definition = $this->entityTypeManager
                ->getDefinition($entity_type_id);
            $translation = $definition->get('translation');
            $access_callback = $translation['content_translation']['access_callback'];
            $access = call_user_func($access_callback, $entity);
            if ($access->isAllowed()) {
                return $access;
            }
            // Check "translate any entity" permission.
            if ($account->hasPermission('translate any entity')) {
                return AccessResult::allowed()->cachePerPermissions()
                    ->inheritCacheability($access);
            }
            // Check per entity permission.
            $permission = "translate {$entity_type_id}";
            if ($definition->getPermissionGranularity() == 'bundle') {
                $permission = "translate {$bundle} {$entity_type_id}";
            }
            return AccessResult::allowedIfHasPermission($account, $permission)->inheritCacheability($access);
        }
        // No opinion.
        return AccessResult::neutral();
    }

}