ContactAccessControlHandler.php

<?php

namespace Drupal\content_entity_example;

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

/**
 * Access controller for the contact entity.
 */
class ContactAccessControlHandler extends EntityAccessControlHandler {
    
    /**
     * {@inheritdoc}
     *
     * Link the activities to the permissions. checkAccess() is called with the
     * $operation as defined in the routing.yml file.
     */
    protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
        // Check the admin_permission as defined in your @ContentEntityType
        // annotation.
        $admin_permission = $this->entityType
            ->getAdminPermission();
        if ($account->hasPermission($admin_permission)) {
            return AccessResult::allowed();
        }
        switch ($operation) {
            case 'view':
                return AccessResult::allowedIfHasPermission($account, 'view contact entity');
            case 'update':
                return AccessResult::allowedIfHasPermission($account, 'edit contact entity');
            case 'delete':
                return AccessResult::allowedIfHasPermission($account, 'delete contact entity');
        }
        return AccessResult::neutral();
    }
    
    /**
     * {@inheritdoc}
     *
     * Separate from the checkAccess because the entity does not yet exist. It
     * will be created during the 'add' process.
     */
    protected function checkCreateAccess(AccountInterface $account, array $context, $entity_bundle = NULL) {
        // Check the admin_permission as defined in your @ContentEntityType
        // annotation.
        $admin_permission = $this->entityType
            ->getAdminPermission();
        if ($account->hasPermission($admin_permission)) {
            return AccessResult::allowed();
        }
        return AccessResult::allowedIfHasPermission($account, 'add contact entity');
    }

}