ldc-portsalaries/app/Http/Controllers/SitesController.php

<?php

namespace App\Http\Controllers;

use App\Enums\Role;
use App\Models\Site;
use Illuminate\Database\Eloquent\Builder;
use Kwaadpepper\CrudPolicies\Traits\CrudController;

class SitesController extends Controller
{
    use CrudController;

    /** @var Site */
    public static $modelClass = Site::class;

    // BO

    // Eloquent callbacks

    public function indexQuery(Builder $query): Builder
    {
        /** @var \App\Models\User */
        $user = auth()->user();
        if (!$user->role->equals(Role::admin())) {
            return $query->whereIn('id', $user->sites()->pluck('id'));
        }
        return $query;
    }
}