TermAccessControlHandler.php

<?php

namespace Drupal\taxonomy;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Entity\EntityAccessControlHandler;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Session\AccountInterface;

/**
 * Defines the access control handler for the taxonomy term entity type.
 *
 * @see \Drupal\taxonomy\Entity\Term
 */
class TermAccessControlHandler extends EntityAccessControlHandler {
    
    /**
     * {@inheritdoc}
     */
    protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
        if ($account->hasPermission('administer taxonomy')) {
            return AccessResult::allowed()->cachePerPermissions();
        }
        switch ($operation) {
            case 'view':
                $access_result = AccessResult::allowedIf($account->hasPermission('access content') && $entity->isPublished())
                    ->cachePerPermissions()
                    ->addCacheableDependency($entity);
                if (!$access_result->isAllowed()) {
                    $access_result->setReason("The 'access content' permission is required and the taxonomy term must be published.");
                }
                return $access_result;
            case 'update':
                if ($account->hasPermission("edit terms in {$entity->bundle()}")) {
                    return AccessResult::allowed()->cachePerPermissions();
                }
                return AccessResult::neutral()->setReason("The following permissions are required: 'edit terms in {$entity->bundle()}' OR 'administer taxonomy'.");
            case 'delete':
                if ($account->hasPermission("delete terms in {$entity->bundle()}")) {
                    return AccessResult::allowed()->cachePerPermissions();
                }
                return AccessResult::neutral()->setReason("The following permissions are required: 'delete terms in {$entity->bundle()}' OR 'administer taxonomy'.");
            default:
                // No opinion.
                return AccessResult::neutral()->cachePerPermissions();
        }
    }
    
    /**
     * {@inheritdoc}
     */
    protected function checkCreateAccess(AccountInterface $account, array $context, $entity_bundle = NULL) {
        return AccessResult::allowedIfHasPermissions($account, [
            "create terms in {$entity_bundle}",
            'administer taxonomy',
        ], 'OR');
    }

}