src/helpers/cart.js


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const getCart = () => {
  const cart = localStorage.getItem('cart');
  if (cart) return JSON.parse(cart);
  return {};
}

const setCart = (cart) => {
  localStorage.setItem('cart', JSON.stringify(cart));
  return true;
}

const getItemCart = (product_id) => {
  let cart = getCart();
  return cart[product_id];
}

const createOrUpdateItemCart = (product_id, quantity) => {
  let cart = getCart();
  let isFoundInCart = cart[product_id];
  if (isFoundInCart) {
    cart[product_id].quantity = quantity;
  } else {
    cart[product_id] = { product_id, quantity };
  }
  setCart(cart);
  return true;
}

const deleteItemCart = (product_id) => {
  let cart = getCart();
  delete cart[product_id]
  setCart(cart);
  return true;
}

export {
  getCart,
  getItemCart,
  createOrUpdateItemCart,
  deleteItemCart
}