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added solution with promises with then and solution with async await #1

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added solution with promises with then and solution with async await #1

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46 changes: 31 additions & 15 deletions promise-exercise/app.js
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Original file line number Diff line number Diff line change
@@ -1,30 +1,46 @@
const orderApi = require('./lib/order.api');
const customerApi = require('./lib/customer.api');


// -------------------------
// Using promises with then
// -------------------------

const submitOrder = (user) => {

let shoppingCart, zipCode, shippingRate, orderSuccessful;

// Get the current user's shopping cart
orderApi.getShoppingCartAsync(user).then((cart) => {
shoppingCart = cart;
});

// Also look up the ZIP code from their profile
customerApi.getProfileAsync(user).then((profile) => {
return customerApi.getProfileAsync(user);
}).then((profile) => {
zipCode = profile.zipCode;
});
shippingRate = orderApi.calculateShippingSync(shoppingCart, zipCode);
return orderApi.placeOrderAsync(shoppingCart, shippingRate);
}).then((success) => {
orderSuccessful = success;
console.log(`Your order ${orderSuccessful ? "was" : "was NOT"} placed successfully`);
})
}

submitOrder(12345);

// Calculate the shipping fees
shippingRate = orderApi.calculateShippingSync(shoppingCart, zipCode);

// Submit the order
orderApi.placeOrderAsync(shoppingCart, shippingRate).then((success) => {
orderSuccessful = success;
});
// -------------------------
// Using aync await
// -------------------------

console.log(`Your order ${orderSuccessful? "was" : "was NOT"} placed successfully`);
};
// async function submitOrder(user) {

// let shoppingCart = await orderApi.getShoppingCartAsync(user);
// let userProfile = await customerApi.getProfileAsync(user);
// let zipCode = userProfile.zipCode;
// let shippingRate = orderApi.calculateShippingSync(shoppingCart, zipCode);
// let orderSuccessful = await orderApi.placeOrderAsync(shoppingCart, shippingRate);
// console.log(`Your order ${orderSuccessful ? "was" : "was NOT"} placed successfully`);
// }

// submitOrder(12345);

submitOrder(12345);