From 18102bfb72675e5a3be960ef12336d3fd4d01190 Mon Sep 17 00:00:00 2001
From: Martin Bavio <mbavio@gmail.com>
Date: Fri, 30 Oct 2020 16:57:10 -0300
Subject: [PATCH] Add cart loading skeleton and complete the task

---
 components/cart/CartEmpty/index.tsx    | 23 ++++++++
 components/cart/CartSkeleton/index.tsx | 76 ++++++++++++++++++++++++++
 lib/hooks/use-cart.ts                  |  6 +-
 pages/cart.tsx                         | 30 ++++------
 tailwind.config.js                     | 14 +++++
 5 files changed, 127 insertions(+), 22 deletions(-)
 create mode 100644 components/cart/CartEmpty/index.tsx
 create mode 100644 components/cart/CartSkeleton/index.tsx

diff --git a/components/cart/CartEmpty/index.tsx b/components/cart/CartEmpty/index.tsx
new file mode 100644
index 000000000..dd5e7e971
--- /dev/null
+++ b/components/cart/CartEmpty/index.tsx
@@ -0,0 +1,23 @@
+import { Bag } from '@components/icons'
+import { Button } from '@components/ui'
+
+const CartEmpty: React.FC = () => {
+  return (
+    <div className="flex-1 px-12 py-24 flex flex-col justify-center items-center ">
+      <span className="border border-dashed border-secondary rounded-full flex items-center justify-center w-16 h-16 bg-primary p-12 rounded-lg text-primary">
+        <Bag className="absolute" />
+      </span>
+      <h2 className="pt-6 text-2xl font-bold tracking-wide text-center">
+        Your cart is empty
+      </h2>
+      <p className="text-accents-6 px-10 text-center pt-2">
+        Biscuit oat cake wafer icing ice cream tiramisu pudding cupcake.
+      </p>
+      <Button href="/" Component="a" className="block mt-8">
+        Continue Shopping
+      </Button>
+    </div>
+  )
+}
+
+export default CartEmpty
diff --git a/components/cart/CartSkeleton/index.tsx b/components/cart/CartSkeleton/index.tsx
new file mode 100644
index 000000000..a93a8a27c
--- /dev/null
+++ b/components/cart/CartSkeleton/index.tsx
@@ -0,0 +1,76 @@
+const CartSkeleton: React.FC = () => {
+  return (
+    <div className="grid lg:grid-cols-12">
+      <div className="lg:col-span-8">
+        <div className="flex-1">
+          <div className="border-t border-accents-2 mt-10 pt-16 sm:pt-10">
+            <div className="animate-cart-pulse flex">
+              <div className="w-16 h-16 bg-gray-300" />
+              <div className="ml-8 w-1/6 flex flex-col">
+                <div className="w-full h-7 bg-gray-300" />
+                <div className="w-1/2 h-5 bg-gray-300 mt-4" />
+              </div>
+              <div className="ml-auto w-24 flex flex-col items-end">
+                <div className="w-full h-7 bg-gray-300" />
+                <div className="w-1/2 h-5 bg-gray-300 mt-4" />
+              </div>
+            </div>
+          </div>
+          <div className="sm:border-t border-accents-2 mt-12 sm:mt-10 pt-12 sm:pt-10 ">
+            <div
+              className="animate-cart-pulse flex"
+              style={{
+                animationFillMode: 'backwards',
+                animationDelay: '225ms',
+              }}
+            >
+              <div className="w-16 h-16 bg-gray-300" />
+              <div className="ml-8 w-1/6 flex flex-col">
+                <div className="w-full h-7 bg-gray-300" />
+                <div className="w-1/2 h-5 bg-gray-300 mt-4" />
+              </div>
+              <div className="ml-auto w-24 flex flex-col items-end">
+                <div className="w-full h-7 bg-gray-300" />
+                <div className="w-1/2 h-5 bg-gray-300 mt-4" />
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+      <div className="lg:col-span-4">
+        <div className="flex-shrink-0 pt-16 sm:pt-10 sm:pl-16">
+          <div className="border-t border-accents-2">
+            <ul className="pt-6 pb-7 animate-cart-pulse">
+              <li className="flex justify-between">
+                <span className="w-16 h-5 bg-gray-300" />
+                <span className="w-20 h-5 bg-gray-300" />
+              </li>
+              <li className="flex justify-between mt-4">
+                <span className="w-12 h-5 bg-gray-300" />
+                <span className="w-24 h-5 bg-gray-300" />
+              </li>
+              <li className="flex justify-between mt-4">
+                <span className="w-36 h-5 bg-gray-300" />
+                <span className="w-12 h-5 bg-gray-300" />
+              </li>
+            </ul>
+            <div className="border-t border-accents-2 font-bold pt-8 mb-10">
+              <div
+                className="flex justify-between animate-cart-pulse"
+                style={{
+                  animationFillMode: 'backwards',
+                  animationDelay: '225ms',
+                }}
+              >
+                <div className="w-12 h-5 bg-gray-300" />
+                <div className="w-24 h-5 bg-gray-300" />
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default CartSkeleton
diff --git a/lib/hooks/use-cart.ts b/lib/hooks/use-cart.ts
index 0ccf60159..a0632d9bf 100644
--- a/lib/hooks/use-cart.ts
+++ b/lib/hooks/use-cart.ts
@@ -3,7 +3,7 @@ import useBigCommercePrice from '@bigcommerce/storefront-data-hooks/use-price'
 
 export const useCart = () => {
   const { data, error, isEmpty } = useBigCommerceCart()
-  const isLoading = data === undefined
+  const items = data?.line_items.physical_items ?? []
 
   const { price: subtotal } = useBigCommercePrice(
     data && {
@@ -18,13 +18,11 @@ export const useCart = () => {
     }
   )
 
-  const items = data?.line_items.physical_items ?? []
-
   return {
     items: data?.line_items.physical_items ?? [],
     isLoading: data === undefined,
     isError: error,
-    isEmpty: isEmpty && data == null,
+    isEmpty: isEmpty && data === null,
     subtotal,
     total,
     currency: data?.currency,
diff --git a/pages/cart.tsx b/pages/cart.tsx
index 9da479a7d..3e853feea 100644
--- a/pages/cart.tsx
+++ b/pages/cart.tsx
@@ -7,6 +7,8 @@ import { Button } from '@components/ui'
 import { Bag, Cross, Check } from '@components/icons'
 import { CartItem } from '@components/cart'
 import { Text } from '@components/ui'
+import CartSkeleton from '@components/cart/CartSkeleton'
+import CartEmpty from '@components/cart/CartEmpty'
 
 export async function getStaticProps({
   preview,
@@ -33,23 +35,12 @@ export default function Cart() {
   return (
     <div className="px-4 pt-2 sm:px-6 flex-1">
       <Text variant="pageHeading">My Cart</Text>
-      {isError && <div className="mt-2">Failed to load</div>}
-      {isLoading && <div>Loading...</div>}
-      {isEmpty ? (
-        <div className="flex-1 px-12 py-24 flex flex-col justify-center items-center ">
-          <span className="border border-dashed border-secondary rounded-full flex items-center justify-center w-16 h-16 bg-primary p-12 rounded-lg text-primary">
-            <Bag className="absolute" />
-          </span>
-          <h2 className="pt-6 text-2xl font-bold tracking-wide text-center">
-            Your cart is empty
-          </h2>
-          <p className="text-accents-6 px-10 text-center pt-2">
-            Biscuit oat cake wafer icing ice cream tiramisu pudding cupcake.
-          </p>
-          <Button href="/" Component="a" className="block mt-8">
-            Continue Shopping
-          </Button>
-        </div>
+      {true ? (
+        <CartSkeleton />
+      ) : isError ? (
+        <div className="mt-2">Failed to load</div>
+      ) : isEmpty ? (
+        <CartEmpty />
       ) : (
         <div className="grid lg:grid-cols-12">
           <div className="lg:col-span-8">
@@ -72,7 +63,10 @@ export default function Cart() {
               </div>
               <div className="flex py-6 space-x-6">
                 {[1, 2, 3, 4, 5, 6].map((x) => (
-                  <div className="border border-accents-3 w-full h-24 bg-accents-2 bg-opacity-50 transform cursor-pointer hover:scale-110 duration-75" />
+                  <div
+                    key={x}
+                    className="border border-accents-3 w-full h-24 bg-accents-2 bg-opacity-50 transform cursor-pointer hover:scale-110 duration-75"
+                  />
                 ))}
               </div>
             </div>
diff --git a/tailwind.config.js b/tailwind.config.js
index fcadb5892..f41011b49 100644
--- a/tailwind.config.js
+++ b/tailwind.config.js
@@ -49,6 +49,20 @@ module.exports = {
         magical:
           'rgba(0, 0, 0, 0.02) 0px 30px 30px, rgba(0, 0, 0, 0.03) 0px 0px 8px, rgba(0, 0, 0, 0.05) 0px 1px 0px',
       },
+      animation: {
+        'cart-pulse': 'pulse 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite',
+      },
+
+      keyframes: {
+        'cart-pulse': {
+          '0%, 100%': {
+            opacity: 0.2,
+          },
+          '50%': {
+            opacity: 1,
+          },
+        },
+      },
     },
   },
   plugins: [require('@tailwindcss/ui')],