JuanDMeGon/Laravel-from-Scratch

use App\Cart;
use Illuminate\Support\Facades\Cookie;

class CartService
{
    protected $cookieName;
    protected $cookieExpiration;

    public function __construct()
    {
        $this->cookieName = config('cart.cookie.name');
        $this->cookieExpiration = config('cart.cookie.expiration');
    }

    public function getFromCookie()
    {
        $cartId = Cookie::get($this->cookieName);

        return Cart::find($cartId);
    }
    //
}

use App\Services\CartService;

class CartController extends Controller
{
    public $cartService;

    public function __construct(CartService $cartService)
    {
        $this->cartService = $cartService;
    }

    public function index()
    {
        $cart = $this->cartService->getFromCookie();

        return view('carts.index')->with([
            'cart' => $cart,
        ]);
    }
}