public function changeQuantity(Request $request)
{
// verify parameters
if (!$request->has("itemId") || !$request->has("quantity")) {
return new Response("Request must contain itemId and quantity", Response::HTTP_BAD_REQUEST);
}
$itemId = $request->input("itemId");
$quantity = $request->input("quantity");
// verify valid itemId
$cartItem = CartItem::find($itemId);
if (is_null($cartItem)) {
return new Response("Item id is invalid: " . $itemId, Response::HTTP_NOT_FOUND);
}
$cartItem->quantity = $quantity;
$cartItem->save();
return $this->success(array('itemId' => $itemId, 'quantity' => $quantity));
}