feat(core-flows,medusa): Add API to update cart's customer (#10151)

what:

- adds an endpoint that updates a cart's customer

RESOLVES CMRC-718

packages/medusa/src/api/store/carts/[id]/customer/route.ts

@@ -0,0 +1,30 @@
+import { updateCartCustomerWorkflow } from "@medusajs/core-flows"
+import { HttpTypes } from "@medusajs/framework/types"
+
+import {
+  AuthenticatedMedusaRequest,
+  MedusaResponse,
+} from "@medusajs/framework/http"
+import { refetchCart } from "../../helpers"
+
+export const POST = async (
+  req: AuthenticatedMedusaRequest,
+  res: MedusaResponse<HttpTypes.StoreCartResponse>
+) => {
+  const workflow = updateCartCustomerWorkflow(req.scope)
+
+  await workflow.run({
+    input: {
+      id: req.params.id,
+      customer_id: req.auth_context?.actor_id,
+    },
+  })
+
+  const cart = await refetchCart(
+    req.params.id,
+    req.scope,
+    req.remoteQueryConfig.fields
+  )
+
+  res.status(200).json({ cart })
+}

packages/medusa/src/api/store/carts/middlewares.ts

@@ -1,8 +1,10 @@
-import { MiddlewareRoute } from "@medusajs/framework/http"
+import {
+  validateAndTransformBody,
+  validateAndTransformQuery,
+} from "@medusajs/framework"
+import { authenticate, MiddlewareRoute } from "@medusajs/framework/http"
 import { ensurePublishableKeyAndSalesChannelMatch } from "../../utils/middlewares/common/ensure-pub-key-sales-channel-match"
 import { maybeAttachPublishableKeyScopes } from "../../utils/middlewares/common/maybe-attach-pub-key-scopes"
-import { validateAndTransformBody } from "@medusajs/framework"
-import { validateAndTransformQuery } from "@medusajs/framework"
 import * as OrderQueryConfig from "../orders/query-config"
 import { StoreGetOrderParams } from "../orders/validators"
 import * as QueryConfig from "./query-config"
@@ -15,6 +17,7 @@ import {
   StoreGetCartsCart,
   StoreRemoveCartPromotions,
   StoreUpdateCart,
+  StoreUpdateCartCustomer,
   StoreUpdateCartLineItem,
 } from "./validators"
 
@@ -53,6 +56,18 @@ export const storeCartRoutesMiddlewares: MiddlewareRoute[] = [
       ),
     ],
   },
+  {
+    method: ["POST"],
+    matcher: "/store/carts/:id/customer",
+    middlewares: [
+      authenticate("customer", ["session", "bearer"]),
+      validateAndTransformBody(StoreUpdateCartCustomer),
+      validateAndTransformQuery(
+        StoreGetCartsCart,
+        QueryConfig.retrieveTransformQueryConfig
+      ),
+    ],
+  },
   {
     method: ["POST"],
     matcher: "/store/carts/:id/line-items",

packages/medusa/src/api/store/carts/validators.ts

@@ -91,3 +91,8 @@ export type StoreCreateCartPaymentCollectionType = z.infer<
   typeof StoreCreateCartPaymentCollection
 >
 export const StoreCreateCartPaymentCollection = z.object({}).strict()
+
+export type StoreUpdateCartCustomerType = z.infer<
+  typeof StoreUpdateCartCustomer
+>
+export const StoreUpdateCartCustomer = z.object({}).strict()