query {
  #to get all products in the marketplace
  #fetchAllProducts has a optional argument available
  #which shows all products with non-zero inventory count
  fetchAllProducts {
    title
    inventory_count
    price
  }
  
  #to get all products in the marketplace with available inventory
  fetchAllProducts(available:true) {
    title
    inventory_count
    price
  }
  
  #to fetch one product with the name "ice cream"
  fetchOneProduct(title:"ice cream") {
    title
    inventory_count
    price
  }
  
  #to fetch all orders (products with multiple quantities)
  #Orders represent a Product with a quantity value
  #useful for buying mutiple of same product
  fetchAllOrders {
      price
      quantity
      product {
        title
        inventory_count
        price
      }
  }
  
  #to fetch all carts
  #cart consists of multiple different orders
  fetchAllCarts {
    id
    total_cost
    orders {
      price
      #also has the other orders fields but let's just leave it here :)
    }
  }
}

mutation {
  #purchase one ice cream
  purchaseProduct(product: "ice cream") {
    title
    inventory_count
  }
  
  #create an empty cart
  createCart() {
    id
    total_cost
  }
  
  #create a cart with 5 ice creams
  createCart(items: ["ice cream:5"]) {
    id
    total_cost
  }
  
  #note for the following mutations you need cart_id, which can be
  #queried for with fetchAllCarts
  
  #add additional items to cart #1
  addToCart(cart_id: 1, items: ["potato:2"]) {
    id
    total_cost
  }
  
  #"checks out" cart #1 by reducing inventory & clearing the cart
  checkOut(cart_id: 1) {
    id
    total_cost
  }
}