d.js

export const currentCustomer = ({router, order, customer}) => {
  const customerId = router.params.customerId; // zależy jak masz w <Route path="/customers/:customerId" />
  const currentCustomer = customer.list
    ? customer.list.find(customer => customer._id === customerId)
    : null;
  const currentCustomerOrders = order.list
    ? order.list.filter(order => order.user._id === customerId)
    : null;
  
  return {
    currentCustomer: currentCustomer,
    currentCustomerId: customerId,
    currentCustomerOrders: currentCustomerOrders,
    isCustomerLoading: order.isListLoading || customer.isListLoading
  };
};

export const currentProduct = ({router, product}) => {
  const productId = router.params.productId; // zależy jak masz w <Route path="/products/:productId" />
  const currentProduct = customer.list
    ? product.list.find(product => product._id === productId)
    : null;
  
  return {
    currentProduct,
    currentProductId: productId,
    isProductLoading: product.isListLoading
  };
};