Fix build errors

framework/swell/cart/use-cart.tsx

@@ -1,27 +1,37 @@
 import useCart, { UseCart } from '@commerce/cart/use-cart'
 import { Cart } from '@commerce/types'
 import { SWRHook } from '@commerce/utils/types'
+import { useMemo } from 'react'
 import { normalizeCart } from '../utils/normalize'
 import { checkoutCreate, checkoutToCart } from './utils'
 
 export default useCart as UseCart<typeof handler>
 
-export const handler: SWRHook<Cart | null> = {
+export const handler: SWRHook<Cart | null, {}, any, { isEmpty?: boolean }> = {
   fetchOptions: {
     query: 'cart',
     method: 'get',
   },
-  async fetcher({ options, fetch }) {
+  async fetcher({ fetch }) {
     const cart = await checkoutCreate(fetch)
 
     return cart ? normalizeCart(cart) : null
   },
   useHook: ({ useData }) => (input) => {
-    return useData({
-      swrOptions: {
-        revalidateOnFocus: false,
-        ...input?.swrOptions,
-      },
+    const response = useData({
+      swrOptions: { revalidateOnFocus: false, ...input?.swrOptions },
     })
+    return useMemo(
+      () =>
+        Object.create(response, {
+          isEmpty: {
+            get() {
+              return (response.data?.lineItems.length ?? 0) <= 0
+            },
+            enumerable: true,
+          },
+        }),
+      [response]
+    )
   },
 }

framework/swell/cart/use-update-item.tsx

@@ -47,7 +47,7 @@ export const handler = {
     }
     const response = await fetch({
       ...options,
-      variables: [item.itemId, { quantity: item.quantity }],
+      variables: [itemId, { quantity: item.quantity }],
     })
 
     return checkoutToCart(response)
@@ -79,7 +79,6 @@ export const handler = {
         const data = await fetch({
           input: {
             item: {
-              itemId,
               productId,
               variantId,
               quantity: input.quantity,

framework/swell/cart/utils/checkout-to-cart.ts

@@ -1,5 +1,5 @@
 import { Cart } from '../../types'
-import { CommerceError, ValidationError } from '@commerce/utils/errors'
+import { CommerceError } from '@commerce/utils/errors'
 
 import {
   CheckoutLineItemsAddPayload,
@@ -20,8 +20,7 @@ const checkoutToCart = (checkoutPayload?: Maybe<CheckoutPayload>): Cart => {
       message: 'Invalid response from Swell',
     })
   }
-
-  return normalizeCart(checkoutPayload)
+  return normalizeCart(checkoutPayload as any)
 }
 
 export default checkoutToCart