Only create cart / cookie when needed

components/cart/actions.ts

@@ -1,13 +1,24 @@
 'use server';
 
-import { addToCart, removeFromCart, updateCart } from 'lib/shopify';
+import { addToCart, createCart, getCart, removeFromCart, updateCart } from 'lib/shopify';
 import { cookies } from 'next/headers';
 
 export const addItem = async (variantId: string | undefined): Promise<Error | undefined> => {
-  const cartId = cookies().get('cartId')?.value;
+  let cartId = cookies().get('cartId')?.value;
+  let cart;
 
-  if (!cartId || !variantId) {
+  if (cartId) {
-    return new Error('Missing cartId or variantId');
+    cart = await getCart(cartId);
+  }
+
+  if (!cartId || !cart) {
+    cart = await createCart();
+    cartId = cart.id;
+    cookies().set('cartId', cartId);
+  }
+
+  if (!variantId) {
+    return new Error('Missing variantId');
   }
   try {
     await addToCart(cartId, [{ merchandiseId: variantId, quantity: 1 }]);

components/cart/index.tsx

@@ -1,23 +1,14 @@
-import { createCart, getCart } from 'lib/shopify';
+import { getCart } from 'lib/shopify';
 import { cookies } from 'next/headers';
 import CartModal from './modal';
 
 export default async function Cart() {
   const cartId = cookies().get('cartId')?.value;
-  let cartIdUpdated = false;
   let cart;
 
   if (cartId) {
     cart = await getCart(cartId);
   }
 
-  // If the `cartId` from the cookie is not set or the cart is empty
+  return <CartModal cart={cart} />;
-  // (old carts becomes `null` when you checkout), then get a new `cartId`
-  //  and re-fetch the cart.
-  if (!cartId || !cart) {
-    cart = await createCart();
-    cartIdUpdated = true;
-  }
-
-  return <CartModal cart={cart} cartIdUpdated={cartIdUpdated} />;
 }

components/cart/modal.tsx

@@ -9,7 +9,6 @@ import { createUrl } from 'lib/utils';
 import Image from 'next/image';
 import Link from 'next/link';
 import { Fragment, useEffect, useRef, useState } from 'react';
-import { useCookies } from 'react-cookie';
 import CloseCart from './close-cart';
 import DeleteItemButton from './delete-item-button';
 import EditItemQuantityButton from './edit-item-quantity-button';
@@ -19,27 +18,15 @@ type MerchandiseSearchParams = {
   [key: string]: string;
 };
 
-export default function CartModal({ cart, cartIdUpdated }: { cart: Cart; cartIdUpdated: boolean }) {
+export default function CartModal({ cart }: { cart: Cart | undefined }) {
-  const [, setCookie] = useCookies(['cartId']);
   const [isOpen, setIsOpen] = useState(false);
-  const quantityRef = useRef(cart.totalQuantity);
+  const quantityRef = useRef(cart?.totalQuantity);
   const openCart = () => setIsOpen(true);
   const closeCart = () => setIsOpen(false);
 
-  useEffect(() => {
-    if (cartIdUpdated) {
-      setCookie('cartId', cart.id, {
-        path: '/',
-        sameSite: 'strict',
-        secure: process.env.NODE_ENV === 'production'
-      });
-    }
-    return;
-  }, [setCookie, cartIdUpdated, cart.id]);
-
   useEffect(() => {
     // Open cart modal when when quantity changes.
-    if (cart.totalQuantity !== quantityRef.current) {
+    if (cart && cart.totalQuantity !== quantityRef.current) {
       // But only if it's not already open (quantity also changes when editing items in cart).
       if (!isOpen) {
         setIsOpen(true);
@@ -48,12 +35,12 @@ export default function CartModal({ cart, cartIdUpdated }: { cart: Cart; cartIdU
       // Always update the quantity reference
       quantityRef.current = cart.totalQuantity;
     }
-  }, [isOpen, cart.totalQuantity, quantityRef]);
+  }, [isOpen, cart?.totalQuantity, quantityRef]);
 
   return (
     <>
       <button aria-label="Open cart" onClick={openCart} data-testid="open-cart">
-        <OpenCart quantity={cart.totalQuantity} />
+        <OpenCart quantity={cart?.totalQuantity} />
       </button>
       <Transition show={isOpen}>
         <Dialog onClose={closeCart} className="relative z-50" data-testid="cart">
@@ -86,7 +73,7 @@ export default function CartModal({ cart, cartIdUpdated }: { cart: Cart; cartIdU
                 </button>
               </div>
 
-              {cart.lines.length === 0 ? (
+              {!cart || cart.lines.length === 0 ? (
                 <div className="mt-20 flex w-full flex-col items-center justify-center overflow-hidden">
                   <ShoppingCartIcon className="h-16" />
                   <p className="mt-6 text-center text-2xl font-bold">Your cart is empty.</p>

lib/shopify/index.ts

@@ -234,15 +234,16 @@ export async function updateCart(
   return reshapeCart(res.body.data.cartLinesUpdate.cart);
 }
 
-export async function getCart(cartId: string): Promise<Cart | null> {
+export async function getCart(cartId: string): Promise<Cart | undefined> {
   const res = await shopifyFetch<ShopifyCartOperation>({
     query: getCartQuery,
     variables: { cartId },
     cache: 'no-store'
   });
 
+  // Old carts becomes `null` when you checkout.
   if (!res.body.data.cart) {
-    return null;
+    return undefined;
   }
 
   return reshapeCart(res.body.data.cart);

package.json

@@ -28,7 +28,6 @@
     "clsx": "^1.2.1",
     "next": "13.4.9-canary.2",
     "react": "18.2.0",
-    "react-cookie": "^4.1.1",
     "react-dom": "18.2.0"
   },
   "devDependencies": {

pnpm-lock.yaml

@@ -16,9 +16,6 @@ dependencies:
   react:
     specifier: 18.2.0
     version: 18.2.0
-  react-cookie:
-    specifier: ^4.1.1
-    version: 4.1.1(react@18.2.0)
   react-dom:
     specifier: 18.2.0
     version: 18.2.0(react@18.2.0)
@@ -384,17 +381,6 @@ packages:
       tailwindcss: 3.3.2
     dev: true
 
-  /@types/cookie@0.3.3:
-    resolution: {integrity: sha512-LKVP3cgXBT9RYj+t+9FDKwS5tdI+rPBXaNSkma7hvqy35lc7mAokC2zsqWJH0LaqIt3B962nuYI77hsJoT1gow==}
-    dev: false
-
-  /@types/hoist-non-react-statics@3.3.1:
-    resolution: {integrity: sha512-iMIqiko6ooLrTh1joXodJK5X9xeEALT1kM5G3ZLhD3hszxBdIEd5C75U834D9mLcINgD4OyZf5uQXjkuYydWvA==}
-    dependencies:
-      '@types/react': 18.2.14
-      hoist-non-react-statics: 3.3.2
-    dev: false
-
   /@types/json5@0.0.29:
     resolution: {integrity: sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==}
     dev: true
@@ -409,6 +395,7 @@ packages:
 
   /@types/prop-types@15.7.5:
     resolution: {integrity: sha512-JCB8C6SnDoQf0cNycqd/35A7MjcnK+ZTqE7judS6o7utxUCg6imJg3QK2qzHKszlTjcj2cn+NwMB2i96ubpj7w==}
+    dev: true
 
   /@types/react-dom@18.2.6:
     resolution: {integrity: sha512-2et4PDvg6PVCyS7fuTc4gPoksV58bW0RwSxWKcPRcHZf0PRUGq03TKcD/rUHe3azfV6/5/biUBJw+HhCQjaP0A==}
@@ -422,9 +409,11 @@ packages:
       '@types/prop-types': 15.7.5
       '@types/scheduler': 0.16.3
       csstype: 3.1.2
+    dev: true
 
   /@types/scheduler@0.16.3:
     resolution: {integrity: sha512-5cJ8CB4yAx7BH1oMvdU0Jh9lrEXyPkar6F9G/ERswkCuvP4KQZfZkSjcMbAICCpQTN4OuZn8tz0HiKv9TGZgrQ==}
+    dev: true
 
   /@typescript-eslint/parser@5.61.0(eslint@8.44.0)(typescript@5.1.3):
     resolution: {integrity: sha512-yGr4Sgyh8uO6fSi9hw3jAFXNBHbCtKKFMdX2IkT3ZqpKmtAq3lHS4ixB/COFuAIJpwl9/AqF7j72ZDWYKmIfvg==}
@@ -890,11 +879,6 @@ packages:
     resolution: {integrity: sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==}
     dev: true
 
-  /cookie@0.4.2:
-    resolution: {integrity: sha512-aSWTXFzaKWkvHO1Ny/s+ePFpvKsPnjc551iI41v3ny/ow6tBG5Vd+FuqGNhh1LxOmVzOlGUriIlOaokOvhaStA==}
-    engines: {node: '>= 0.6'}
-    dev: false
-
   /cross-spawn@7.0.3:
     resolution: {integrity: sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==}
     engines: {node: '>= 8'}
@@ -912,6 +896,7 @@ packages:
 
   /csstype@3.1.2:
     resolution: {integrity: sha512-I7K1Uu0MBPzaFKg4nI5Q7Vs2t+3gWWW648spaF+Rg7pI9ds18Ugn+lvg4SHczUdKlHI5LWBXyqfS8+DufyBsgQ==}
+    dev: true
 
   /damerau-levenshtein@1.0.8:
     resolution: {integrity: sha512-sdQSFB7+llfUcQHUQO3+B8ERRj0Oa4w9POWMI/puGtuf7gFywGmkaLCElnudfTiKZV+NvHqL0ifzdrI8Ro7ESA==}
@@ -1740,12 +1725,6 @@ packages:
       function-bind: 1.1.1
     dev: true
 
-  /hoist-non-react-statics@3.3.2:
-    resolution: {integrity: sha512-/gGivxi8JPKWNm/W0jSmzcMPpfpPLc3dY/6GxhX2hQ9iGj3aDfklV4ET7NjKpSinLpJ5vafa9iiGIEZg10SfBw==}
-    dependencies:
-      react-is: 16.13.1
-    dev: false
-
   /hosted-git-info@2.8.9:
     resolution: {integrity: sha512-mxIDAb9Lsm6DoOJ7xH+5+X4y1LU/4Hi50L9C5sIswK3JzULS4bwk1FvjdBgvYR4bzT4tuUQiC15FE2f5HbLvYw==}
     dev: true
@@ -2711,17 +2690,6 @@ packages:
     resolution: {integrity: sha512-NuaNSa6flKT5JaSYQzJok04JzTL1CA6aGhv5rfLW3PgqA+M2ChpZQnAC8h8i4ZFkBS8X5RqkDBHA7r4hej3K9A==}
     dev: true
 
-  /react-cookie@4.1.1(react@18.2.0):
-    resolution: {integrity: sha512-ffn7Y7G4bXiFbnE+dKhHhbP+b8I34mH9jqnm8Llhj89zF4nPxPutxHT1suUqMeCEhLDBI7InYwf1tpaSoK5w8A==}
-    peerDependencies:
-      react: '>= 16.3.0'
-    dependencies:
-      '@types/hoist-non-react-statics': 3.3.1
-      hoist-non-react-statics: 3.3.2
-      react: 18.2.0
-      universal-cookie: 4.0.4
-    dev: false
-
   /react-dom@18.2.0(react@18.2.0):
     resolution: {integrity: sha512-6IMTriUmvsjHUjNtEDudZfuDQUoWXVxKHhlEGSk81n4YFS+r/Kl99wXiwlVXtPBtJenozv2P+hxDsw9eA7Xo6g==}
     peerDependencies:
@@ -2734,6 +2702,7 @@ packages:
 
   /react-is@16.13.1:
     resolution: {integrity: sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==}
+    dev: true
 
   /react@18.2.0:
     resolution: {integrity: sha512-/3IjMdb2L9QbBdWiW5e3P2/npwMBaU9mHCSCUzNln0ZCYbcfTsGbTJrU/kGemdH2IWmB2ioZ+zkxtmq6g09fGQ==}
@@ -3308,13 +3277,6 @@ packages:
       which-boxed-primitive: 1.0.2
     dev: true
 
-  /universal-cookie@4.0.4:
-    resolution: {integrity: sha512-lbRVHoOMtItjWbM7TwDLdl8wug7izB0tq3/YVKhT/ahB4VDvWMyvnADfnJI8y6fSvsjh51Ix7lTGC6Tn4rMPhw==}
-    dependencies:
-      '@types/cookie': 0.3.3
-      cookie: 0.4.2
-    dev: false
-
   /untildify@4.0.0:
     resolution: {integrity: sha512-KK8xQ1mkzZeg9inewmFVDNkg3l5LUhoq9kN6iWYB/CC9YMG8HA+c1Q8HwDe6dEX7kErrEVNVBO3fWsVq5iDgtw==}
     engines: {node: '>=8'}