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Building an E-commerce Website With Directus and Next.js

Published June 3rd, 2024

Written By
Trust Jamin
Trust Jamin
Guest Author

E-commerce websites are among the most popular for businesses as they enable customers to purchase items from your store from the comfort of their homes. In this article, you'll build an e-commerce store with Next.js as its front end, Directus as its backend services, and Stripe for payment processing.

Before You Start

You will need:

Set Up Directus

Data Model Relationships

Before setting up Directus, let's understand how the different data models you will set up in Directus are related. You need 3 data collections - categories, products, orders. A product can only be in one category in this data model.

Diagram of a Data Model Relationship for products, orders and categories

In your Directus project, head to Settings -> Data Model to create these data models with the following fields:

  • categories:

    • id: the primary field of this collection
    • name: A string field for naming categories
    • description: A string field for describing the category type
  • products:

    • id: the primary field of this collection
    • is_available: A toggle field for a product that indicates if the product is available for purchasing.
    • name: A string input field for the product name.
    • price: A string input field for the price of a product.
    • image: An image field for product image.
    • description: A string field for description of the product.
    • category: A Many to One relational field related to the categories collection, signifying that multiple products can only have a single category type.
    • order_id: A Many to One relational field related to the orders collection, signifying that multiple products can belong to a single order.
  • orders:

    • id: the primary field of this collection
    • order_no: A string input field uniquely generated to identify an order.
    • first_name: A string input for first name.
    • last_name: A string input for last name.
    • shipping_address: A string input for address to ship the order to.
    • email: A string input for email address
    • payment_id: A string input for the order payment that happened on Stripe.
    • total_amount: A string input for the total cost of the order
    • products: A One to Many relational field related to the products collection, signifying that an order can have multiple products.

    Create some items in the Categories and Products collections - here's some sample data.

    Set Up a Next.js Application

Run the following command to initialize a Next.js project:

bash
npx create-next-app@14 e-com-directus
npx create-next-app@14 e-com-directus

Install the Directus SDK and Stripe:

bash
npm install @directus/sdk @stripe/stripe-js stripe
npm install @directus/sdk @stripe/stripe-js stripe

Set Up Directus SDK and Types

Open the e-com-directus project in a text editor and create a .env.local file, being sure to place the value with your Directus project URL:

bash
DIRECTUS_URL=YOUR_DIRECTUS_URL
APP_URL=http://localhost:3000
DIRECTUS_URL=YOUR_DIRECTUS_URL
APP_URL=http://localhost:3000

Create a new directory called types and inside of it, create an index.ts file with the content:

ts
export type ProductTypes = {
  id: number;
  name: string;
  image: string;
  price: number;
  description: string;
  category: CategoryTypes[]
  is_available: boolean;
  order_id: OrderTypes
};
export type CategoryTypes = {
  name: string;
  description: string
}
 export type OrderTypes = {
  order_no: string;
  email: string;
  date: string;
  total_amount: string;
  first_name: string;
  last_name: string;
  shipping_address: string;
  products: number[];
  payment_id: string;
 };
export type ProductTypes = {
  id: number;
  name: string;
  image: string;
  price: number;
  description: string;
  category: CategoryTypes[]
  is_available: boolean;
  order_id: OrderTypes
};
export type CategoryTypes = {
  name: string;
  description: string
}
 export type OrderTypes = {
  order_no: string;
  email: string;
  date: string;
  total_amount: string;
  first_name: string;
  last_name: string;
  shipping_address: string;
  products: number[];
  payment_id: string;
 };

Next, create a new directory called lib. Inside it, create directus.ts to initialize a new Directus SDK instance:

ts
import { createDirectus, rest } from "@directus/sdk";
import { CategoryTypes, OrderTypes, ProductTypes } from "@/types"

type Schema = {
  products: ProductTypes[];
  categories: CategoryTypes[];
  orders: OrderTypes[];
};

const directus = createDirectus<Schema>(
  process.env.DIRECTUS_URL as string
).with(rest());

export default directus;
import { createDirectus, rest } from "@directus/sdk";
import { CategoryTypes, OrderTypes, ProductTypes } from "@/types"

type Schema = {
  products: ProductTypes[];
  categories: CategoryTypes[];
  orders: OrderTypes[];
};

const directus = createDirectus<Schema>(
  process.env.DIRECTUS_URL as string
).with(rest());

export default directus;

Create Directus API Actions

In the lib directory, create a new file called apis.ts. This file will contain all the API requests the Next.js application will make to Directus.

Add a getAllProducts function to lib/apis.ts:

tsx
import directus from "./directus";
import { readItems, createItem, updateItems } from "@directus/sdk";
import { OrderTypes } from "@/types";

export const getAllProducts = async () => {
  try {
    const results = await directus.request(
      readItems("products", {
        filter: {
          is_available: {
            _eq: true,
          }
        }
      })
    );
    return results;
  }
  catch (error) {
    console.error("Error fetching products:", error);
    console.log(error);
  }
};
import directus from "./directus";
import { readItems, createItem, updateItems } from "@directus/sdk";
import { OrderTypes } from "@/types";

export const getAllProducts = async () => {
  try {
    const results = await directus.request(
      readItems("products", {
        filter: {
          is_available: {
            _eq: true,
          }
        }
      })
    );
    return results;
  }
  catch (error) {
    console.error("Error fetching products:", error);
    console.log(error);
  }
};

This function fetches all the products on the store that are available for purchase.

Next, create another function for implementing search functionality called searchProducts:

tsx
export const searchProducts = async (query: string) => {
  try {
    const results = await directus.request(
      readItems("products", {
        search: query,
        filter: {
          is_available: {
            _eq: true,
          }
        }
      })
    );
    return results;
  } catch (error) {
    console.error("Error searching for products:", error);
    console.log(error);
  }
};
export const searchProducts = async (query: string) => {
  try {
    const results = await directus.request(
      readItems("products", {
        search: query,
        filter: {
          is_available: {
            _eq: true,
          }
        }
      })
    );
    return results;
  } catch (error) {
    console.error("Error searching for products:", error);
    console.log(error);
  }
};

This function searches through the products collection in Directus and returns the product(s) that matches the query and is available for purchase.

Next, add a function called createOrder with the content:

tsx
export async function createOrder(orderData: OrderTypes) {
  try {
    const results = await directus.request(
      createItem("orders", { ...orderData })
    );
    console.log(results);
    await directus.request(updateItems("products", orderData.products, { is_available: false }))
    return `Order created successfully, Your order No is:  + ${results.order_no}`;

  } catch (error) {
    console.error("Error creating order:", error);
    console.log(error);
  }
}
export async function createOrder(orderData: OrderTypes) {
  try {
    const results = await directus.request(
      createItem("orders", { ...orderData })
    );
    console.log(results);
    await directus.request(updateItems("products", orderData.products, { is_available: false }))
    return `Order created successfully, Your order No is:  + ${results.order_no}`;

  } catch (error) {
    console.error("Error creating order:", error);
    console.log(error);
  }
}

This function performs two actions:

  • Sends a request to the orders collection in Directus to create a new order.
  • When that request is successful, it sends another request to update the products collection to mark the item(s) as paid.

Set up a Shopping Cart for Next.js

Create a Cart Context

A typical e-commerce store usually has a cart for customers to add items they want to purchase into before checking out, let's implement a cart functionality using React-Context

In the app directory, create a directory called context, inside of it, create a file named cart-context.tsx with the content:

tsx
"use client";

import { createContext, useState, useEffect } from 'react'

export const CartContext = createContext<CartContextType>({cartItems: [], addToCart: () => {}, removeFromCart: () => {}, clearCart: () => {}, getCartTotal: () => 0})

type CartContextType = {
  cartItems: CartItem[];
  addToCart: (item: CartItem) => void;
  removeFromCart: (item: CartItem) => void;
  clearCart: () => void;
  getCartTotal: () => number;
};

type CartProviderProps = {
  children: React.ReactNode;
}

type CartItem = {
  id: number;
  name: string;
  image: string;
  price: number;
};

export function CartProvider({ children }: CartProviderProps) {

  const [cartItems, setCartItems] = useState<CartItem[]>(() => {
      const storedCartItems = localStorage.getItem('cartItems');
      return storedCartItems ? JSON.parse(storedCartItems) : [];
  });

  const addToCart = (item: CartItem) => {
    const isItemInCart = cartItems.find((cartItem) => cartItem.id === item.id);

    if (!isItemInCart) {
      setCartItems([...cartItems, { ...item }]);
    }
  };

  const removeFromCart = (item: CartItem) => {
      setCartItems(cartItems.filter((cartItem) => cartItem.id !== item.id));
  };

  const clearCart = () => {
    setCartItems([]);
  };

  const getCartTotal = () => {
    return cartItems.reduce((total, item) => total + Number(item.price), 0);
  };

  useEffect(() => {
    if (typeof window !== 'undefined') {
      const data = localStorage.getItem('cartItems');
      if (data) {
        setCartItems(JSON.parse(data));
      }
    }
  }, []);

  useEffect(() => {
    if (typeof window !== 'undefined') {
      localStorage.setItem('cartItems', JSON.stringify(cartItems));
    }
  }, [cartItems]);

  return (
    <CartContext.Provider
    value={{
      cartItems,
      addToCart,
      removeFromCart,
      clearCart,
      getCartTotal,
    }}>
      {children}
    </CartContext.Provider>
  );

};
"use client";

import { createContext, useState, useEffect } from 'react'

export const CartContext = createContext<CartContextType>({cartItems: [], addToCart: () => {}, removeFromCart: () => {}, clearCart: () => {}, getCartTotal: () => 0})

type CartContextType = {
  cartItems: CartItem[];
  addToCart: (item: CartItem) => void;
  removeFromCart: (item: CartItem) => void;
  clearCart: () => void;
  getCartTotal: () => number;
};

type CartProviderProps = {
  children: React.ReactNode;
}

type CartItem = {
  id: number;
  name: string;
  image: string;
  price: number;
};

export function CartProvider({ children }: CartProviderProps) {

  const [cartItems, setCartItems] = useState<CartItem[]>(() => {
      const storedCartItems = localStorage.getItem('cartItems');
      return storedCartItems ? JSON.parse(storedCartItems) : [];
  });

  const addToCart = (item: CartItem) => {
    const isItemInCart = cartItems.find((cartItem) => cartItem.id === item.id);

    if (!isItemInCart) {
      setCartItems([...cartItems, { ...item }]);
    }
  };

  const removeFromCart = (item: CartItem) => {
      setCartItems(cartItems.filter((cartItem) => cartItem.id !== item.id));
  };

  const clearCart = () => {
    setCartItems([]);
  };

  const getCartTotal = () => {
    return cartItems.reduce((total, item) => total + Number(item.price), 0);
  };

  useEffect(() => {
    if (typeof window !== 'undefined') {
      const data = localStorage.getItem('cartItems');
      if (data) {
        setCartItems(JSON.parse(data));
      }
    }
  }, []);

  useEffect(() => {
    if (typeof window !== 'undefined') {
      localStorage.setItem('cartItems', JSON.stringify(cartItems));
    }
  }, [cartItems]);

  return (
    <CartContext.Provider
    value={{
      cartItems,
      addToCart,
      removeFromCart,
      clearCart,
      getCartTotal,
    }}>
      {children}
    </CartContext.Provider>
  );

};

Let's break down the cart-context component for better understanding:

  • CartContext uses React's createContext API to create a new context and useState for storing items into the cartItem array.
  • Use localStorage for storing cartItems for persistance
  • Creates a CartProvider component from which the context can be passed from to other components
  • addToCart adds an item to the shopping cart if it's not already there.
  • removeFromCart removes an item from the shopping cart.
  • clearCart clears all items from the shopping cart.
  • getCartTotal calculates the total price of all items in the shopping cart.

To use the CartProvider, update the layout.tsx in the app directory with the content:

tsx
import type { Metadata } from "next";
import { CartProvider } from "./context/cart-context";


export const metadata: Metadata = {
  title: "Create Next App",
  description: "Generated by create next app",
};

export default function RootLayout({
  children,
}: Readonly<{
  children: React.ReactNode;
}>) {
  return (
    <CartProvider>
      <html lang="en">
        <body>
          <main>
            {children}
          </main>
        </body>
      </html>
    </CartProvider>
  );
}
import type { Metadata } from "next";
import { CartProvider } from "./context/cart-context";


export const metadata: Metadata = {
  title: "Create Next App",
  description: "Generated by create next app",
};

export default function RootLayout({
  children,
}: Readonly<{
  children: React.ReactNode;
}>) {
  return (
    <CartProvider>
      <html lang="en">
        <body>
          <main>
            {children}
          </main>
        </body>
      </html>
    </CartProvider>
  );
}

This will wrap the whole application with the CartProvider ensuring you can retrieve values and actions from the cart when you need.

Create a NavBar With Cart

In the root directory of your project, create a components directory and create a nav-bar.tsx file with the content:

tsx
"use client";

import { CartContext } from "@/app/context/cart-context";
import { useContext, useEffect, useState } from "react";
import Link from 'next/link'

export default function NavBar() {
  const [isClient, setIsClient] = useState(false)
  const cart = useContext(CartContext);
  useEffect(() => {
    setIsClient(true)
  }, [])
   return isClient &&  (
    <nav>
      <div>
        <span><Link href="/">Home</Link></span>
        <span>Cart: <Link href="/checkout/cart"> {cart.cartItems.length} items in cart</Link></span>
      </div>
    </nav>
  );
}
"use client";

import { CartContext } from "@/app/context/cart-context";
import { useContext, useEffect, useState } from "react";
import Link from 'next/link'

export default function NavBar() {
  const [isClient, setIsClient] = useState(false)
  const cart = useContext(CartContext);
  useEffect(() => {
    setIsClient(true)
  }, [])
   return isClient &&  (
    <nav>
      <div>
        <span><Link href="/">Home</Link></span>
        <span>Cart: <Link href="/checkout/cart"> {cart.cartItems.length} items in cart</Link></span>
      </div>
    </nav>
  );
}

The NavBar component, first uses the CartContext created earlier to retrieves cartItems and then checks if the component is rendered on the client side and renders the Navbar with the cart.

Implement The Search Functionality

An important feature of every e-commerce store is to be able to search for items a customer needs, the Directus search parameter enables you to implement this feature seamlessly.

Create a Search Form

In the components/nav-bar.tsx file, update the NavBar component to be:

tsx
"use client";

import { CartContext } from "@/app/context/cart-context";
import { useRouter, useSearchParams } from "next/navigation";
import { useContext, useEffect, useState } from "react";
import Link from 'next/link'

export default function NavBar() {
  const router = useRouter();
  const searchParams = useSearchParams()
  const [isClient, setIsClient] = useState(false)

  const handleSubmit = (event: React.FormEvent<HTMLFormElement>) => {
    event.preventDefault();
    const formData = new FormData(event.currentTarget);
    const searchQuery = formData.get("search") as string;
    router.push(`/search?query=${searchQuery}`)
  };

  const cart = useContext(CartContext);
  useEffect(() => {
    setIsClient(true)
  }, [])
   return isClient &&  (
    <div>
      <div>
        <span><Link href="/">Home</Link></span>
        <span>Cart: <Link href="/checkout/cart"> {cart.cartItems.length} items in cart</Link></span>
      </div>
      <form onSubmit={handleSubmit}>
      <input
        type="text"
        placeholder="Search for products..."
        name="search"
        defaultValue={searchParams.get('query') || ''}
      />
      <button type="submit">Search</button>
      </form>
    </div>
  );
}
"use client";

import { CartContext } from "@/app/context/cart-context";
import { useRouter, useSearchParams } from "next/navigation";
import { useContext, useEffect, useState } from "react";
import Link from 'next/link'

export default function NavBar() {
  const router = useRouter();
  const searchParams = useSearchParams()
  const [isClient, setIsClient] = useState(false)

  const handleSubmit = (event: React.FormEvent<HTMLFormElement>) => {
    event.preventDefault();
    const formData = new FormData(event.currentTarget);
    const searchQuery = formData.get("search") as string;
    router.push(`/search?query=${searchQuery}`)
  };

  const cart = useContext(CartContext);
  useEffect(() => {
    setIsClient(true)
  }, [])
   return isClient &&  (
    <div>
      <div>
        <span><Link href="/">Home</Link></span>
        <span>Cart: <Link href="/checkout/cart"> {cart.cartItems.length} items in cart</Link></span>
      </div>
      <form onSubmit={handleSubmit}>
      <input
        type="text"
        placeholder="Search for products..."
        name="search"
        defaultValue={searchParams.get('query') || ''}
      />
      <button type="submit">Search</button>
      </form>
    </div>
  );
}

The code above updates the NavBar component with a search form and a handleSubmit function to handle the form submission that redirects users to the search page after submission.

In the app/layout.tsx file, update the rendered component with the NavBar

tsx
...
<main>
<NavBar />
  {children}
</main>
...
...
<main>
<NavBar />
  {children}
</main>
...

Navbar with Cart

Create The Product Components

In the components directory, create a file called product-item.tsx with the content:

tsx
"use client";
import { CartContext } from "@/app/context/cart-context";
import { ProductTypes } from "@/types";
import Image from "next/image";
import { useContext } from "react";

export default function ProductItem({
  id,
  name,
  image,
  price,
}: ProductTypes) {
  const cart = useContext(CartContext);
  const imageUrl = `http://localhost:8055/assets/${image}`;
  return (
    <div>
      <Image
        src={imageUrl}
        width={200}
        height={250}
        alt={name}
      />
      <h2>{name}</h2>
      <p>
        {price}
        <button onClick={() => cart.addToCart({id, name, price, image: imageUrl})}>Add to Cart</button>
      </p>
    </div>
  );
}
"use client";
import { CartContext } from "@/app/context/cart-context";
import { ProductTypes } from "@/types";
import Image from "next/image";
import { useContext } from "react";

export default function ProductItem({
  id,
  name,
  image,
  price,
}: ProductTypes) {
  const cart = useContext(CartContext);
  const imageUrl = `http://localhost:8055/assets/${image}`;
  return (
    <div>
      <Image
        src={imageUrl}
        width={200}
        height={250}
        alt={name}
      />
      <h2>{name}</h2>
      <p>
        {price}
        <button onClick={() => cart.addToCart({id, name, price, image: imageUrl})}>Add to Cart</button>
      </p>
    </div>
  );
}

The above code displays the image, name and price of a product and also adds a addToCart button that uses the CartContext to add items to the cart.

Next, in the components directory, create a list component product-list.tsx that lists all the products using the ProductItem components:

tsx
import ProductItem from "./product-item";
import { ProductTypes } from "@/types";

type ProductListProps = {
  products: ProductTypes[];
};
export default function ProductList({ products }: ProductListProps) {
  return (
    <div>
      {
        products.length > 0 ? products.map((product) => (
         <ProductItem {...product} key={product.id}  />
        )) : "No products found."
      }
    </div>
  );
}
import ProductItem from "./product-item";
import { ProductTypes } from "@/types";

type ProductListProps = {
  products: ProductTypes[];
};
export default function ProductList({ products }: ProductListProps) {
  return (
    <div>
      {
        products.length > 0 ? products.map((product) => (
         <ProductItem {...product} key={product.id}  />
        )) : "No products found."
      }
    </div>
  );
}

Create a Search Result Page

In the app directory, create a new directory called search and create a page.tsx file inside it with the content:

tsx
import ProductList from "@/components/product-list";
import { searchProducts } from "@/lib/apis";
export default async function Search({
  searchParams,
}: {
  searchParams?: { [key: string]: string | string[] | undefined };
}) {
  const { query } = searchParams as { [key: string]: string };
  const products =  await searchProducts(query) || [];

  return (
    <section>
      <h1>Search Page For Products</h1>
      <p>Showing results for {query}</p>
      <ProductList products={products} />
    </section>
  );
}
import ProductList from "@/components/product-list";
import { searchProducts } from "@/lib/apis";
export default async function Search({
  searchParams,
}: {
  searchParams?: { [key: string]: string | string[] | undefined };
}) {
  const { query } = searchParams as { [key: string]: string };
  const products =  await searchProducts(query) || [];

  return (
    <section>
      <h1>Search Page For Products</h1>
      <p>Showing results for {query}</p>
      <ProductList products={products} />
    </section>
  );
}

The component above uses the searchProducts function to search for products from Directus and passes them as props to ProductList to display.

Search Result Page

Display all Products from The Store

In the app/page.tsx file, update the content to be:

tsx
import ProductList from "@/components/product-list";
import { getAllProducts } from "@/lib/apis";

export default async function Home() {
  const products =  await getAllProducts() || [];
  return (
    <section>
      <h1>Hello and Welcome to Directus + Next.js E-commerce</h1>
      <p>Find amazing items for your purchase</p>
        <ProductList products={products} />
      </section>
  );
}
import ProductList from "@/components/product-list";
import { getAllProducts } from "@/lib/apis";

export default async function Home() {
  const products =  await getAllProducts() || [];
  return (
    <section>
      <h1>Hello and Welcome to Directus + Next.js E-commerce</h1>
      <p>Find amazing items for your purchase</p>
        <ProductList products={products} />
      </section>
  );
}

Using the getAllProducts function this component will get all available products and display them on the homepage.

All Products Page

Show Items in the Cart

In the app directory, create a checkout directory and inside of it create a cart directory with page.tsx and update its content:

app/checkout/cart/page.tsx

tsx
"use client";

import { CartContext } from "@/app/context/cart-context";
import Link from "next/link";
import { useContext } from "react";

export default function CheckoutCartPage() {
  const cart = useContext(CartContext);
  return (
    <section>
      <div>
        <h2>Cart</h2>
        <ul>
          {cart.cartItems.map((cartItem) => (
            <li key={cartItem.id}>
              <div>
                <span>{cartItem.name}</span>
                <span> ${cartItem.price} </span>
                <button onClick={() => cart.removeFromCart(cartItem)}>
                  {" "}
                  Remove
                </button>
              </div>
            </li>
          ))}
        </ul>
        {cart.cartItems.length > 0 ? (
          <div>
            <div>Total: {cart.getCartTotal()}</div>
            <Link href="/checkout/shipping">Proceed to Shipping</Link>
            <button onClick={() => cart.clearCart()}>Clear Cart</button>
          </div>
        ) : (
          <p>Your cart is empty</p>
        )}
      </div>
    </section>
  );
}
"use client";

import { CartContext } from "@/app/context/cart-context";
import Link from "next/link";
import { useContext } from "react";

export default function CheckoutCartPage() {
  const cart = useContext(CartContext);
  return (
    <section>
      <div>
        <h2>Cart</h2>
        <ul>
          {cart.cartItems.map((cartItem) => (
            <li key={cartItem.id}>
              <div>
                <span>{cartItem.name}</span>
                <span> ${cartItem.price} </span>
                <button onClick={() => cart.removeFromCart(cartItem)}>
                  {" "}
                  Remove
                </button>
              </div>
            </li>
          ))}
        </ul>
        {cart.cartItems.length > 0 ? (
          <div>
            <div>Total: {cart.getCartTotal()}</div>
            <Link href="/checkout/shipping">Proceed to Shipping</Link>
            <button onClick={() => cart.clearCart()}>Clear Cart</button>
          </div>
        ) : (
          <p>Your cart is empty</p>
        )}
      </div>
    </section>
  );
}

This page displays all the items in the cart, a link to the next step of the checkout and also displays a clearCart button to remove all items from the cart.

Cart page listing all items in cart

Set up Stripe for Receiving Payments

In the root of your project, create a utils directory with a generateOrderNum.ts file with the content:

ts
export default function generateOrderNum() {
  const length = 10
  let result = '';
  const characters = '0123456789';
  const charactersLength = characters.length;
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
  }
  console.log(result)
  return result;
}
generateOrderNum();
export default function generateOrderNum() {
  const length = 10
  let result = '';
  const characters = '0123456789';
  const charactersLength = characters.length;
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
  }
  console.log(result)
  return result;
}
generateOrderNum();

Next, update your .env.local file with the publishable and secret keys you can find in your Stripe account:

bash
NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY=YOUR_STRIPE_PUBLISHABLE_KEY
STRIPE_SECRET_KEY=YOUR_STRIPE_SECRET_KEY
NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY=YOUR_STRIPE_PUBLISHABLE_KEY
STRIPE_SECRET_KEY=YOUR_STRIPE_SECRET_KEY

In your app directory, create a new directory called api and, inside of it, create a directory stripe-session with a route.ts file (app/api/stripe-session/route.ts):

ts
import { ProductTypes } from "@/types";
import { NextResponse } from "next/server";
import Stripe from "stripe";
import generateOrderNum from "@/utils/generateOrderNum";

const stripe = new Stripe(process.env.STRIPE_SECRET_KEY as string);

type RequestData = {
  first_name: string,
  last_name: string,
  email: string,
  total_amount: number,
  address: string,
  products: ProductTypes[]
  shipping_address: string,
};
export async function POST(req: Request) {
  const {
    first_name,
    last_name,
    email,
    total_amount,
    shipping_address,
    products
  }: RequestData = await req.json();

  const order_no = generateOrderNum();

  const line_items = products.map(product => ({
    quantity: 1,
    price_data: {
      currency: "usd",
      product_data: {
        name: product.name,
        description: product.description,
      },
      unit_amount: product.price * 100, // Stripe expects prices in cents
    },
  }));

  try {
    console.log(order_no)

    const stripeSession = await stripe.checkout.sessions.create({
      line_items,
      mode: "payment",
      success_url: `${process.env.APP_URL}/checkout/success?orderNo=${order_no}`,
      cancel_url: `${process.env.APP_URL}/checkout/shipping`,
      metadata: {
        total_amount: total_amount * 100, // Stripe expects prices in cents
        first_name,
        last_name,
        email,
        date: new Date().toISOString(),
        products: JSON.stringify(products.map(product => (product.id))),
        shipping_address,
        order_no,
      },
    });

    console.log(stripeSession);
    return NextResponse.json({ url: stripeSession.url! });
  } catch (err) {
    console.log({ err });
    return NextResponse.json(
      { message: "An expected error occurred, please try again" },
      { status: 500 }
    );
  }
}
import { ProductTypes } from "@/types";
import { NextResponse } from "next/server";
import Stripe from "stripe";
import generateOrderNum from "@/utils/generateOrderNum";

const stripe = new Stripe(process.env.STRIPE_SECRET_KEY as string);

type RequestData = {
  first_name: string,
  last_name: string,
  email: string,
  total_amount: number,
  address: string,
  products: ProductTypes[]
  shipping_address: string,
};
export async function POST(req: Request) {
  const {
    first_name,
    last_name,
    email,
    total_amount,
    shipping_address,
    products
  }: RequestData = await req.json();

  const order_no = generateOrderNum();

  const line_items = products.map(product => ({
    quantity: 1,
    price_data: {
      currency: "usd",
      product_data: {
        name: product.name,
        description: product.description,
      },
      unit_amount: product.price * 100, // Stripe expects prices in cents
    },
  }));

  try {
    console.log(order_no)

    const stripeSession = await stripe.checkout.sessions.create({
      line_items,
      mode: "payment",
      success_url: `${process.env.APP_URL}/checkout/success?orderNo=${order_no}`,
      cancel_url: `${process.env.APP_URL}/checkout/shipping`,
      metadata: {
        total_amount: total_amount * 100, // Stripe expects prices in cents
        first_name,
        last_name,
        email,
        date: new Date().toISOString(),
        products: JSON.stringify(products.map(product => (product.id))),
        shipping_address,
        order_no,
      },
    });

    console.log(stripeSession);
    return NextResponse.json({ url: stripeSession.url! });
  } catch (err) {
    console.log({ err });
    return NextResponse.json(
      { message: "An expected error occurred, please try again" },
      { status: 500 }
    );
  }
}

The code above:

  • Create a Next.js API that expects a request order information to create a new order.
  • Create a new Stripe session with the stripe.checkout.sessions.create method from the Stripe SDK.
  • Add the required data to create payment details for Stripe products, such as a name, description and unit_amount.
  • Specify payment as the Stripe mode of payment.
  • Provide a success_url and cancel_url URL to redirect the user to determine if the payment was successful or cancelled.
  • Attach a metadata object to save the user details to the stripe payment payload when the payment is initiated.
  • Returns the Stripe payment session URL so the user can make the payment if the request is successful.

You will use this API route in the next section of this tutorial.

Create a Shipping Info Page

With items in the cart, you need to create a checkout page, get shipping details, and pay for the products. To do this, create a new directory in app/checkout called shipping. Inside of it, create a form.tsx (app/checkout/shipping/form.tsx):

tsx
"use client";

import { CartContext } from "@/app/context/cart-context";
import { useContext } from "react";

export default function ShippingForm() {
  const cart = useContext(CartContext);

  const handleSubmit = async (e: React.FormEvent<HTMLFormElement>) => {
    e.preventDefault();
    const formData = new FormData(e.currentTarget);
    const shippingInfo = Object.fromEntries(formData.entries());
    const orderData = {
      email: shippingInfo.email,
      first_name: shippingInfo.firstName,
      last_name: shippingInfo.lastName,
      shipping_address: shippingInfo.shippingAddress,
      total_amount: cart.getCartTotal(),
      products: cart.cartItems,
    };
    try {
      console.log({orderData})
      const response = await fetch("/api/checkout-session", {
        method: "POST",
        body: JSON.stringify(orderData),
      });

      if (response.ok) {
        const payment = await response.json();
        window.location.href = payment.url;
      } else {
        console.error("Error submitting form:", response.statusText);
      }
    } catch (error) {
      console.error("Error:", error);
    }
  }
  return (
    <form onSubmit={handleSubmit}>
      <label>
        Email
        <input type="email" name="email"   />
      </label>
      <label>
        First Name
        <input type="text" name="firstName" />
      </label>
      <label>
        Last Name
        <input type="text" name="lastName" />
      </label>
      <label>
        Shipping Address
        <input type="text" name="shippingAddress" />
      </label>
      <button type="submit">Proceed to Payment</button>
    </form>
  )
}
"use client";

import { CartContext } from "@/app/context/cart-context";
import { useContext } from "react";

export default function ShippingForm() {
  const cart = useContext(CartContext);

  const handleSubmit = async (e: React.FormEvent<HTMLFormElement>) => {
    e.preventDefault();
    const formData = new FormData(e.currentTarget);
    const shippingInfo = Object.fromEntries(formData.entries());
    const orderData = {
      email: shippingInfo.email,
      first_name: shippingInfo.firstName,
      last_name: shippingInfo.lastName,
      shipping_address: shippingInfo.shippingAddress,
      total_amount: cart.getCartTotal(),
      products: cart.cartItems,
    };
    try {
      console.log({orderData})
      const response = await fetch("/api/checkout-session", {
        method: "POST",
        body: JSON.stringify(orderData),
      });

      if (response.ok) {
        const payment = await response.json();
        window.location.href = payment.url;
      } else {
        console.error("Error submitting form:", response.statusText);
      }
    } catch (error) {
      console.error("Error:", error);
    }
  }
  return (
    <form onSubmit={handleSubmit}>
      <label>
        Email
        <input type="email" name="email"   />
      </label>
      <label>
        First Name
        <input type="text" name="firstName" />
      </label>
      <label>
        Last Name
        <input type="text" name="lastName" />
      </label>
      <label>
        Shipping Address
        <input type="text" name="shippingAddress" />
      </label>
      <button type="submit">Proceed to Payment</button>
    </form>
  )
}

The ShippingForm component:

  • Loads the Stripe SDK when the component is mounted using the loadStripe function.
  • Creates a form that gets the user details such as firstName, lastName, email and shippingAddress.
  • Gets the selected products in the cart and total cost
  • Creates a new orderData object, combining the items in the cart and the user-filled form data.
  • When the form is submitted, it fires up a request to the /api/stripe-session route you created in the previous step to trigger a payment from Stripe.
  • When the request is successful, it redirects the user to the Stripe payment link returned from the Stripe API route.

To render this form in the same directory, create a new file called page.tsx with the content:

tsx
import ShippingForm from "./form";

export default function ShippingPage() {
  return (
    <section>
      <div>
      <h2>Shipping Information</h2>
        <ShippingForm />
      </div>
    </section>
  );
}
import ShippingForm from "./form";

export default function ShippingPage() {
  return (
    <section>
      <div>
      <h2>Shipping Information</h2>
        <ShippingForm />
      </div>
    </section>
  );
}

Shipping form page

Clicking on the Procced to Payment button to submit the form will trigger a Stripe payment and take you to a Stripe checkout:

Stripe checkout page

This form will trigger a stripe payment to pay for the selected products.

Next, create a success directory in the app/checkout directory to create a success page when payment is successfully made.

In the success directory, first create a message.tsx component to display the message:

tsx
"use client";

import { CartContext } from "@/app/context/cart-context";
import { useContext, useEffect } from "react";


export default function SuccessMessage({ orderNo }: { orderNo: string }) {
  const { clearCart } = useContext(CartContext);

  useEffect(() => {
    console.log("Clearing cart");
      clearCart();
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);
  return (
    <section>
      <h1>Congratulations! Your Order was successfully placed, your Order No is: {orderNo}</h1>
    </section>
  );
}
"use client";

import { CartContext } from "@/app/context/cart-context";
import { useContext, useEffect } from "react";


export default function SuccessMessage({ orderNo }: { orderNo: string }) {
  const { clearCart } = useContext(CartContext);

  useEffect(() => {
    console.log("Clearing cart");
      clearCart();
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);
  return (
    <section>
      <h1>Congratulations! Your Order was successfully placed, your Order No is: {orderNo}</h1>
    </section>
  );
}

The message.tsx component displays a success message and clears the cart.

Next, create a page.tsx that has the content:

tsx
"use client"
import { useRouter } from "next/navigation";
import { useEffect, useState } from "react";
import SuccessMessage from "./message";

interface SuccessPageProps {
  searchParams?: { [key: string]: string | string[] | undefined };
}

export default function SuccessPage({ searchParams }: SuccessPageProps) {
  const { orderNo } = searchParams || {};
  const router = useRouter();
  const [isClient, setIsClient] = useState(false)

  useEffect(() => {
    setIsClient(true)
  }, [])

  if (!orderNo) {
    router.push("/checkout");
    return null;
  }
  return isClient &&  (<SuccessMessage orderNo={orderNo as string} /> )
}
"use client"
import { useRouter } from "next/navigation";
import { useEffect, useState } from "react";
import SuccessMessage from "./message";

interface SuccessPageProps {
  searchParams?: { [key: string]: string | string[] | undefined };
}

export default function SuccessPage({ searchParams }: SuccessPageProps) {
  const { orderNo } = searchParams || {};
  const router = useRouter();
  const [isClient, setIsClient] = useState(false)

  useEffect(() => {
    setIsClient(true)
  }, [])

  if (!orderNo) {
    router.push("/checkout");
    return null;
  }
  return isClient &&  (<SuccessMessage orderNo={orderNo as string} /> )
}

Checkout success page

Configure A Webhook for Stripe Payment Events

When a Stripe payment is resolved successfully, we want to send Directus a request to create a new order using the metadata we stored in the payment request.

To do this, Stripe has a list of events that we can listen to when a payment is triggered. Let's create a webhook in Next.js that can listen to a Stripe event when a payment goes through.

In your app/api/ directory, create a new directory with a subdirectory called webhook/stripe, and inside of this directory, create a route.ts for implementing a webhook,

Add the following code to route.ts:

ts
import { NextResponse } from "next/server";
import Stripe from "stripe";
import { createOrder } from "@/lib/apis";

const checkout_session_completed = "checkout.session.completed";
const stripe = new Stripe(process.env.STRIPE_SECRET_KEY as string);

export async function POST(req: Request, res: Response) {
  const reqBody = await req.text();
  const sig = req.headers.get("stripe-signature");
  const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET;

  let event: Stripe.Event;

  try {
    if (!sig || !webhookSecret) return;
    event = stripe.webhooks.constructEvent(reqBody, sig, webhookSecret);
  } catch (error: any) {
    console.log(error);
    return NextResponse.json(
      { message: `Webhook Error: ${error.message}` },
      { status: 500 }
    );
  }

  // load our event
  switch (event.type) {
    case checkout_session_completed:
      const session = event.data.object;
      if (!session.metadata || !session.payment_intent) {
        console.error("Missing metadata or Payment Intent in Stripe session");
        // Optionally return an error response
        return NextResponse.json(
          { message: "Incomplete order data" },
          { status: 400 }
        );
      }

      const {
        // @ts-ignore
        metadata: {
          total_amount,
          first_name,
          last_name,
          shipping_address,
          email,
          products,
          date,
          order_no,
        },
        payment_intent,
      } = session;
      console.log({ payment_intent });
      await createOrder({
        total_amount,
        first_name,
        last_name,
        shipping_address,
        email,
        products: JSON.parse(products),
        payment_id: payment_intent as string,
        order_no,
        date: date
      });

      return NextResponse.json("Booking successful", {
        status: 200,
        statusText: "Booking Successful",
      });

    default:
      console.log(`Unhandled event type ${event.type}`);
  }

    return NextResponse.json({ message: "Event Received" }, { status: 200 });
  }
import { NextResponse } from "next/server";
import Stripe from "stripe";
import { createOrder } from "@/lib/apis";

const checkout_session_completed = "checkout.session.completed";
const stripe = new Stripe(process.env.STRIPE_SECRET_KEY as string);

export async function POST(req: Request, res: Response) {
  const reqBody = await req.text();
  const sig = req.headers.get("stripe-signature");
  const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET;

  let event: Stripe.Event;

  try {
    if (!sig || !webhookSecret) return;
    event = stripe.webhooks.constructEvent(reqBody, sig, webhookSecret);
  } catch (error: any) {
    console.log(error);
    return NextResponse.json(
      { message: `Webhook Error: ${error.message}` },
      { status: 500 }
    );
  }

  // load our event
  switch (event.type) {
    case checkout_session_completed:
      const session = event.data.object;
      if (!session.metadata || !session.payment_intent) {
        console.error("Missing metadata or Payment Intent in Stripe session");
        // Optionally return an error response
        return NextResponse.json(
          { message: "Incomplete order data" },
          { status: 400 }
        );
      }

      const {
        // @ts-ignore
        metadata: {
          total_amount,
          first_name,
          last_name,
          shipping_address,
          email,
          products,
          date,
          order_no,
        },
        payment_intent,
      } = session;
      console.log({ payment_intent });
      await createOrder({
        total_amount,
        first_name,
        last_name,
        shipping_address,
        email,
        products: JSON.parse(products),
        payment_id: payment_intent as string,
        order_no,
        date: date
      });

      return NextResponse.json("Booking successful", {
        status: 200,
        statusText: "Booking Successful",
      });

    default:
      console.log(`Unhandled event type ${event.type}`);
  }

    return NextResponse.json({ message: "Event Received" }, { status: 200 });
  }

Let's break down the webhook route handler for better understanding:

  • Initialize a new Stripe instance using a STRIPE_SECRET_KEY.
  • Use the request body as the "stripe-signature" header and STRIPE_WEBHOOK_SECRET to check the authenticity of the request and create the Stripe event.
  • Use a switch statement to listen for the Stripe event where the event.type is checkout.session.completed (This means the payment checkout went through successfully in Stripe)
  • Extract the metadata and payment_intent from the session that the event.data.object provides. Using the data extracted from the metadata, the webhook requests Directus to create a new order.

Testing the Webhook

With Stripe CLI installed on your computer, run the command:

bash
stripe login
stripe login

Forward the API route handle in the Next.js application to Stripe to listen for it with the command:

bash
stripe listen --forward-to localhost:3000/api/webhook/stripe
stripe listen --forward-to localhost:3000/api/webhook/stripe

This will provide you with a response similar to this:

bash
Ready! You are using Stripe API Version [2022-08-01]. Your webhook signing secret is whsec_f9e4axxxxxxx (^C to quit)
Ready! You are using Stripe API Version [2022-08-01]. Your webhook signing secret is whsec_f9e4axxxxxxx (^C to quit)

Copy your webhook signing secret, and update the .env.local with:

bash
STRIPE_WEBHOOK_SECRET=whsec_f9e4axxxxxxx
STRIPE_WEBHOOK_SECRET=whsec_f9e4axxxxxxx

After that, open a new terminal tab and test the webhook by triggering a Stripe event from the CLI with:

bash
stripe trigger payment_intent.succeeded
stripe trigger payment_intent.succeeded

You will receive a response that looks like this:

Stripe webhook terminal

Summary

In this tutorial, you've successfully created a e-commerce website that fetches products and implementing search functionality with Directus, implement relational datasets, trigger a payment on Stripe, create a webhook that listens to the Stripe payment, and then make an order in Directus.

The complete code for this tutorial can be found here.

Some possible steps to carry out next might include:

  • Styling the Application:: The project is made with HTML. To make it, consider styling the application with CSS or a CSS framework of your choice.

  • Comprehensive Inventory:: Consider implementing a comprehensive inventory in Directus to add features such as, multiple variants of a single product, inventory quantity e.t.c to better keep track of products in-stock.

  • User Authentication: Consider adding user authentication so users can sign up, log in, and manage their orders. This adds a layer of security.

  • Full Cart Functionality: The current cart only allows customers to add a single item to once, consider expanding on it's functionalities to have a quantity field to add more quantity of a single item.

  • Email Notifications: Set up email notifications to confirm orders, send reminders, and provide updates on shipping status. This can also be implemented in Directus using Directus Flows.

We're all ears 🐰

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