align with upstream changes

framework/shopify/provider.ts

@@ -0,0 +1,63 @@
+import { Fetcher, HookHandler } from '@commerce/utils/types'
+import {
+  API_TOKEN,
+  API_URL,
+  SHOPIFY_CHECKOUT_ID_COOKIE,
+  STORE_DOMAIN,
+} from './const'
+import { normalizeCart } from './lib/normalize'
+import { Cart } from './types'
+
+import handleFetchResponse from './utils/handle-fetch-response'
+
+const useCart: HookHandler<
+  Cart | null,
+  [],
+  any,
+  any,
+  any,
+  { isEmpty?: boolean }
+> = {
+  fetchOptions: {
+    url: '/api/bigcommerce/cart',
+    method: 'GET',
+  },
+  swrOptions: {
+    revalidateOnFocus: false,
+  },
+  normalizer: normalizeCart,
+  onResponse(response) {
+    return Object.create(response, {
+      isEmpty: {
+        get() {
+          return (response.data?.lineItems.length ?? 0) <= 0
+        },
+        enumerable: true,
+      },
+    })
+  },
+}
+
+const fetcher: Fetcher = async ({ method = 'GET', variables, query }) => {
+  return handleFetchResponse(
+    await fetch(API_URL, {
+      method,
+      body: JSON.stringify({ query, variables }),
+      headers: {
+        'X-Shopify-Storefront-Access-Token': API_TOKEN!,
+        'Content-Type': 'application/json',
+      },
+    })
+  )
+}
+
+export const shopifyProvider = {
+  locale: 'en-us',
+  cartCookie: SHOPIFY_CHECKOUT_ID_COOKIE,
+  storeDomain: STORE_DOMAIN,
+  fetcher,
+  cartNormalizer: normalizeCart,
+  cart: { useCart },
+}
+
+export type ShopifyProvider = typeof shopifyProvider