ldc-supportweb/app/Policies/Rules/SiteStaticRules.php

<?php

namespace App\Policies\Rules;

use App\Models\Ticket;
use App\Models\User;
use Kwaadpepper\CrudPolicies\Policies\Rules\StaticRules;

/**
 * Userlevel Policiy Static Rules
 * ! Rules has to return boolean value
 */
abstract class SiteStaticRules extends StaticRules
{
    protected static function userSitesHasTicket(User $user, Ticket $ticket)
    {
        return $user->sites->contains($ticket->site_id);
    }
}