Restricting user to add more product items than the stock has

theme/dap/cart/CartSidebarView/CartSidebarView.tsx

@@ -0,0 +1,129 @@
+import cn from 'classnames'
+import Link from 'next/link'
+import { FC } from 'react'
+import s from './CartSidebarView.module.css'
+import CartItem from '../CartItem'
+import { Button, Text } from '@components/ui'
+import { useUI } from '@components/ui/context'
+import { Bag, Cross, Check } from '@components/icons'
+import useCart from '@framework/cart/use-cart'
+import usePrice from '@framework/product/use-price'
+import SidebarLayout from '@components/common/SidebarLayout'
+
+const CartSidebarView: FC = () => {
+  const { closeSidebar, setSidebarView } = useUI()
+  const { data, isLoading, isEmpty } = useCart()
+
+  const { price: subTotal } = usePrice(
+    data && {
+      amount: Number(data.subtotalPrice),
+      currencyCode: data.currency.code,
+    }
+  )
+  const { price: total } = usePrice(
+    data && {
+      amount: Number(data.totalPrice),
+      currencyCode: data.currency.code,
+    }
+  )
+  const handleClose = () => closeSidebar()
+  const goToCheckout = () => setSidebarView('CHECKOUT_VIEW')
+
+  const error = null
+  const success = null
+
+  return (
+    <SidebarLayout
+      className={cn({
+        [s.empty]: error || success || isLoading || isEmpty,
+      })}
+      handleClose={handleClose}
+    >
+      {isLoading || isEmpty ? (
+        <div className="flex-1 px-4 flex flex-col justify-center items-center">
+          <span className="border border-dashed border-primary rounded-full flex items-center justify-center w-16 h-16 p-12 bg-secondary text-secondary">
+            <Bag className="absolute" />
+          </span>
+          <h2 className="pt-6 text-2xl font-bold tracking-wide text-center">
+            Your cart is empty
+          </h2>
+          <p className="text-accent-3 px-10 text-center pt-2">
+            Biscuit oat cake wafer icing ice cream tiramisu pudding cupcake.
+          </p>
+        </div>
+      ) : error ? (
+        <div className="flex-1 px-4 flex flex-col justify-center items-center">
+          <span className="border border-white rounded-full flex items-center justify-center w-16 h-16">
+            <Cross width={24} height={24} />
+          </span>
+          <h2 className="pt-6 text-xl font-light text-center">
+            We couldn’t process the purchase. Please check your card information
+            and try again.
+          </h2>
+        </div>
+      ) : success ? (
+        <div className="flex-1 px-4 flex flex-col justify-center items-center">
+          <span className="border border-white rounded-full flex items-center justify-center w-16 h-16">
+            <Check />
+          </span>
+          <h2 className="pt-6 text-xl font-light text-center">
+            Thank you for your order.
+          </h2>
+        </div>
+      ) : (
+        <>
+          <div className="px-4 sm:px-6 flex-1">
+            <Link href="/cart">
+              <Text variant="sectionHeading" onClick={handleClose}>
+                My Cart
+              </Text>
+            </Link>
+            <ul className={s.lineItemsList}>
+              {data!.lineItems.map((item: any) => (
+                <CartItem
+                  key={item.id}
+                  item={item}
+                  currencyCode={data!.currency.code}
+                />
+              ))}
+            </ul>
+          </div>
+
+          <div className="flex-shrink-0 px-6 py-6 sm:px-6 sticky z-20 bottom-0 w-full right-0 left-0 bg-accent-0 border-t text-sm">
+            <ul className="pb-2">
+              <li className="flex justify-between py-1">
+                <span>Subtotal</span>
+                <span>{subTotal}</span>
+              </li>
+              <li className="flex justify-between py-1">
+                <span>Taxes</span>
+                <span>Calculated at checkout</span>
+              </li>
+              <li className="flex justify-between py-1">
+                <span>Shipping</span>
+                <span className="font-bold tracking-wide">FREE</span>
+              </li>
+            </ul>
+            <div className="flex justify-between border-t border-accent-2 py-3 font-bold mb-2">
+              <span>Total</span>
+              <span>{total}</span>
+            </div>
+            <div>
+              {process.env.COMMERCE_CUSTOMCHECKOUT_ENABLED ? (
+                <Button Component="a" width="100%" onClick={goToCheckout}>
+                  Proceed to Checkout ({total})
+                </Button>
+              ) : (
+                <Button href="/checkout" Component="a" width="100%">
+                  Proceed to Checkout
+                </Button>
+              )}
+            </div>
+          </div>
+        </>
+      )}
+    </SidebarLayout>
+  )
+}
+
+export default CartSidebarView