Create a food ordering app with Strapi and Next.js 6/7

This tutorial is part of the « Cooking a Deliveroo clone with Next.js (React), GraphQL, Strapi and Stripe » tutorial series.

Table of contents

• 🏗️ Setup (part 1)
• 🏠 Restaurants (part 2)
• 🍔 Dishes (part 3)
• 🔐 Authentication (part 4)
• 🛒 Shopping Cart (part 5)
• 💵 Order and Checkout (part 6) - current
• 🚀 Bonus: Deploy (part 7)

_Note: the source code is available on GitHub: https://github.com/ryanbelke/community-content/tree/master/tutorials/code

💵 Order and Checkout

You must start being starving... I am sure you want to be able to order!

Define Content Type

We need to store the orders in our database, so we are going to create a new Content Type in our API.

Same process as usual:

• Navigate to the Content Type Builder (http://localhost:1337/admin/plugins/content-type-builder).
• Click on + Create new collection type.
• Set order as name.
• Click on Add New Field and create the followings fields:
  • address with type Text.
  • city with type Text.
  • dishes with type JSON.
  • amount with type Number (big integer).
• Click on Finish then Save.

Allow access

To create new orders from the client, we are going to hit the create endpoint of the order API. To allow access, navigate to the Roles & Permissions section (http://localhost:1337/admin/plugins/users-permissions), select the authenticated role, tick the order/create checkbox and save.

Stripe setup

In this section you will need Stripe API keys. To get them, create a Stripe account and navigate to https://dashboard.stripe.com/account/apikeys.

Add logic

If you have already used Stripe, you probably know the credit card information does not go through your backend server. Instead, the credit card information is sent to the Stripe API (ideally using their SDK). Then, your frontend receives a token that can be used to charge credit cards. The id must be sent to your backend which will create the Stripe charge.

Not passing the credit card information through your server relieves you the responsibility to meet complicated data handling compliance, and is just far easier than worrying about securely storing sensitive data.

Install the stripe package inside the backend directory:

$ cd ..
$ cd ..
$ cd ..
$ cd backend
$ npm i stripe --save

In order to integrate the Stripe logic, we need to update the create charge endpoint in our Strapi API. To do so, edit backend/api/order/controllers/order.js and replace its content with:

Path: /backend/api/order/controllers/order.js

*Make sure to insert your stripe secret key (sk_) at the top where it instructs.

"use strict";

/**
 * Order.js controller
 *
 * @description: A set of functions called "actions" for managing `Order`.
 */

const stripe = require("stripe")("YOUR STRIPE SECRET KEY");

module.exports = {
  /**
   * Create a/an order record.
   *
   * @return {Object}
   */

  create: async (ctx) => {
    const { address, amount, dishes, token, city, state } = JSON.parse(
      ctx.request.body
    );
    const stripeAmount = Math.floor(amount * 100);
    // charge on stripe
    const charge = await stripe.charges.create({
      // Transform cents to dollars.
      amount: stripeAmount,
      currency: "usd",
      description: `Order ${new Date()} by ${ctx.state.user._id}`,
      source: token,
    });

    // Register the order in the database
    const order = await strapi.services.order.create({
      user: ctx.state.user.id,
      charge_id: charge.id,
      amount: stripeAmount,
      address,
      dishes,
      city,
      state,
    });

    return order;
  },
};

Note: in a real-world example, the amount should be checked on the backend side and the list of dishes related to the command should be stored in a more specific Content Type called orderDetail.

Do not forget to restart the Strapi server.

To interact with the Stripe API, we will use the react-stripe-js which will give us Elements components to style our credit card form and submit the information properly to Stripe.

Checkout page

Now let's install the stripe UI elements for the frontend:

$ cd ..
$ cd frontend
$ yarn add @stripe/react-stripe-js@1.1.2 @stripe/stripe-js@1.5.0

Now we are going to create the checkout form and card section component to capture the credit card info and pass it to Stripe using the react-stripe-elements package:

Create the checkout form files:

$ cd components
$ mkdir checkout
$ cd checkout
$ touch CheckoutForm.js

Path: /frontend/components/checkout/CheckoutForm.js

/* /components/Checkout/CheckoutForm.js */

import React, { useState, useContext } from "react";

import { FormGroup, Label, Input } from "reactstrap";

import fetch from "isomorphic-fetch";
import Cookies from "js-cookie";
import { CardElement, useStripe, useElements } from "@stripe/react-stripe-js";

import CardSection from "./CardSection";
import AppContext from "../../context/AppContext";


function CheckoutForm() {
  const [data, setData] = useState({
    address: "",
    city: "",
    state: "",
    stripe_id: "",
  });
  const [error, setError] = useState("");
  const stripe = useStripe();
  const elements = useElements();
  const appContext = useContext(AppContext);

  function onChange(e) {
    // set the key = to the name property equal to the value typed
    const updateItem = (data[e.target.name] = e.target.value);
    // update the state data object
    setData({ ...data, updateItem });
  }

  async function submitOrder() {
    // event.preventDefault();

    // // Use elements.getElement to get a reference to the mounted Element.
    const cardElement = elements.getElement(CardElement);

    // // Pass the Element directly to other Stripe.js methods:
    // // e.g. createToken - https://stripe.com/docs/js/tokens_sources/create_token?type=cardElement
    // get token back from stripe to process credit card
    const token = await stripe.createToken(cardElement);
    const userToken = Cookies.get("token");
    const response = await fetch(`${process.env.NEXT_PUBLIC_API_URL}/orders`, {
      method: "POST",
      headers: userToken && { Authorization: `Bearer ${userToken}` },
      body: JSON.stringify({
        amount: Number(Math.round(appContext.cart.total + "e2") + "e-2"),
        dishes: appContext.cart.items,
        address: data.address,
        city: data.city,
        state: data.state,
        token: token.token.id,
      }),
    });

    if (!response.ok) {
      setError(response.statusText);
    }

    // OTHER stripe methods you can use depending on app
    // // or createPaymentMethod - https://stripe.com/docs/js/payment_intents/create_payment_method
    // stripe.createPaymentMethod({
    //   type: "card",
    //   card: cardElement,
    // });

    // // or confirmCardPayment - https://stripe.com/docs/js/payment_intents/confirm_card_payment
    // stripe.confirmCardPayment(paymentIntentClientSecret, {
    //   payment_method: {
    //     card: cardElement,
    //   },
    // });
  }

  return (
    <div className="paper">
      <h5>Your information:</h5>
      <hr />
      <FormGroup style={{ display: "flex" }}>
        <div style={{ flex: "0.90", marginRight: 10 }}>
          <Label>Address</Label>
          <Input name="address" onChange={onChange} />
        </div>
      </FormGroup>
      <FormGroup style={{ display: "flex" }}>
        <div style={{ flex: "0.65", marginRight: "6%" }}>
          <Label>City</Label>
          <Input name="city" onChange={onChange} />
        </div>
        <div style={{ flex: "0.25", marginRight: 0 }}>
          <Label>State</Label>
          <Input name="state" onChange={onChange} />
        </div>
      </FormGroup>

      <CardSection data={data} stripeError={error} submitOrder={submitOrder} />

      <style jsx global>
        {`
          .paper {
            border: 1px solid lightgray;
            box-shadow: 0px 1px 3px 0px rgba(0, 0, 0, 0.2),
              0px 1px 1px 0px rgba(0, 0, 0, 0.14),
              0px 2px 1px -1px rgba(0, 0, 0, 0.12);
            height: 550px;
            padding: 30px;
            background: #fff;
            border-radius: 6px;
            margin-top: 90px;
          }
          .form-half {
            flex: 0.5;
          }
          * {
            box-sizing: border-box;
          }
          body,
          html {
            background-color: #f6f9fc;
            font-size: 18px;
            font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
          }
          h1 {
            color: #32325d;
            font-weight: 400;
            line-height: 50px;
            font-size: 40px;
            margin: 20px 0;
            padding: 0;
          }
          .Checkout {
            margin: 0 auto;
            max-width: 800px;
            box-sizing: border-box;
            padding: 0 5px;
          }
          label {
            color: #6b7c93;
            font-weight: 300;
            letter-spacing: 0.025em;
          }
          button {
            white-space: nowrap;
            border: 0;
            outline: 0;
            display: inline-block;
            height: 40px;
            line-height: 40px;
            padding: 0 14px;
            box-shadow: 0 4px 6px rgba(50, 50, 93, 0.11),
              0 1px 3px rgba(0, 0, 0, 0.08);
            color: #fff;
            border-radius: 4px;
            font-size: 15px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.025em;
            background-color: #6772e5;
            text-decoration: none;
            -webkit-transition: all 150ms ease;
            transition: all 150ms ease;
            margin-top: 10px;
          }
          form {
            margin-bottom: 40px;
            padding-bottom: 40px;
            border-bottom: 3px solid #e6ebf1;
          }
          button:hover {
            color: #fff;
            cursor: pointer;
            background-color: #7795f8;
            transform: translateY(-1px);
            box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1),
              0 3px 6px rgba(0, 0, 0, 0.08);
          }
          input,
          .StripeElement {
            display: block;
            background-color: #f8f9fa !important;
            margin: 10px 0 20px 0;
            max-width: 500px;
            padding: 10px 14px;
            font-size: 1em;
            font-family: "Source Code Pro", monospace;
            box-shadow: rgba(50, 50, 93, 0.14902) 0px 1px 3px,
              rgba(0, 0, 0, 0.0196078) 0px 1px 0px;
            border: 0;
            outline: 0;
            border-radius: 4px;
            background: white;
          }
          input::placeholder {
            color: #aab7c4;
          }
          input:focus,
          .StripeElement--focus {
            box-shadow: rgba(50, 50, 93, 0.109804) 0px 4px 6px,
              rgba(0, 0, 0, 0.0784314) 0px 1px 3px;
            -webkit-transition: all 150ms ease;
            transition: all 150ms ease;
          }
          .StripeElement.IdealBankElement,
          .StripeElement.PaymentRequestButton {
            padding: 0;
          }
        `}
      </style>
    </div>
  );
}
export default CheckoutForm;

Now create a CardSection.js file to use the React Elements in, this will house the input boxes that will capture the CC information.

$ touch CardSection.js

Path: /frontend/components/checkout/CardSection.js

Let's create the checkout page to bring it all together.

Create a new page: pages/checkout.js/,

$ cd ..
$ cd ..
$ cd pages
$ touch checkout.js

Path: /frontend/pages/checkout.js

/* pages/checkout.js */

import React, { useContext } from "react";

import { Row, Col } from "reactstrap";
import { loadStripe } from "@stripe/stripe-js";
import { Elements } from "@stripe/react-stripe-js";
import InjectedCheckoutForm from "../components/checkout/CheckoutForm";
import AppContext from "../context/AppContext";

import Cart from "../components/cart/";

function Checkout() {
  // get app context
  const appContext = useContext(AppContext);
  // isAuthenticated is passed to the cart component to display order button
  const { isAuthenticated } = appContext;

  // load stripe to inject into elements components
  const stripePromise = loadStripe("YOUR STRIPE PUBLIC (pk_) KEY");

  return (
    <Row>
      <Col style={{ paddingRight: 0 }} sm={{ size: 3, order: 1, offset: 2 }}>
        <h1 style={{ margin: 20 }}>Checkout</h1>
        <Cart isAuthenticated={isAuthenticated} />
      </Col>
      <Col style={{ paddingLeft: 5 }} sm={{ size: 6, order: 2 }}>
        <Elements stripe={stripePromise}>
          <InjectedCheckoutForm />
        </Elements>
      </Col>
    </Row>
  );
  // }
}
export default Checkout;

Now if you select a dish and click order you should see:

Now if you submit your order, you should see the order under the Strapi dashboard as follows:

Explanations 🕵️

Note: explanations of code samples only, do not change your code to match this as you should already have this code this is simply a snippet

The stripe library will be initialized by the loadStripe('your key') function/argument.

This will allow the stripe library to load the elements components.

This is what is rendering the card, zip and CVV on a single line.

Stripe will automatically detect which components are generating the CC information and what information to send to receive the token.

This submitOrder function will first make the call to Stripe with the CC information and receive back the Token if the CC check passed. If the token is received we next call the Strapi SDK to create the order passing in the appropriate extra order information and token id.

This is what creates the order in Stripe and creates the DB entry in Strapi. If successful you should see your Stripe test balances increase by the amount of the test order.

async function submitOrder() {
    // event.preventDefault();

    // // Use elements.getElement to get a reference to the mounted Element.
    const cardElement = elements.getElement(CardElement);

    // // Pass the Element directly to other Stripe.js methods:
    // // e.g. createToken - https://stripe.com/docs/js/tokens_sources/create_token?type=cardElement
    // get token back from stripe to process credit card
    const token = await stripe.createToken(cardElement);
    const userToken = Cookies.get("token");
    const response = await fetch(`${process.env.NEXT_PUBLIC_API_URL}/orders`, {
      method: "POST",
      headers: userToken && { Authorization: `Bearer ${userToken}` },
      body: JSON.stringify({
        amount: Number(Math.round(appContext.cart.total + "e2") + "e-2"),
        dishes: appContext.cart.items,
        address: data.address,
        city: data.city,
        state: data.state,
        token: token.token.id,
      }),
    });

    if (!response.ok) {
      setError(response.statusText);
    }

    // OTHER stripe methods you can use depending on app
    // // or createPaymentMethod - https://stripe.com/docs/js/payment_intents/create_payment_method
    // stripe.createPaymentMethod({
    //   type: "card",
    //   card: cardElement,
    // });

    // // or confirmCardPayment - https://stripe.com/docs/js/payment_intents/confirm_card_payment
    // stripe.confirmCardPayment(paymentIntentClientSecret, {
    //   payment_method: {
    //     card: cardElement,
    //   },
    // });
  }

You are now able to let users submit their order.

Bon appétit!

🚀 In the next (and last) section, you will learn how to deploy your Strapi app on Heroku and your frontend app on NOW: https://strapi.io/blog/nextjs-react-hooks-strapi-deploy.