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
{
    /**
     * Check if a user can access a ticket
     *
     * @param \App\Models\User   $user
     * @param \App\Models\Ticket $ticket
     * @return boolean
     */
    protected static function userSitesHasTicket(User $user, Ticket $ticket)
    {
        return $user->sites->contains($ticket->site_id);
    }
}