feat(medusa, core-workflows, product): slightly improve create cart workflow (#5725)

packages/medusa/src/services/cart.ts

@@ -364,11 +364,15 @@ class CartService extends TransactionBaseService {
           ).id
         }
 
-        if (data.customer_id) {
-          const customer = await this.customerService_
-            .withTransaction(transactionManager)
-            .retrieve(data.customer_id)
-            .catch(() => undefined)
+        if (data.customer_id || data.customer) {
+          const customer =
+            (data.customer ??
+            (data.customer_id &&
+              (await this.customerService_
+                .withTransaction(transactionManager)
+                .retrieve(data.customer_id)
+                .catch(() => undefined)))) as Customer
+
           rawCart.customer = customer
           rawCart.customer_id = customer?.id
           rawCart.email = customer?.email

packages/medusa/src/types/cart.ts

@@ -8,6 +8,7 @@ import { Cart, CartType } from "../models/cart"
 import { IsType } from "../utils/validators/is-type"
 import { Region } from "../models"
 import { ValidateNested } from "class-validator"
+import { CustomerTypes } from "@medusajs/types"
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export function isCart(object: any): object is Cart {
@@ -60,6 +61,7 @@ export type CartCreateProps = {
   shipping_address?: Partial<AddressPayload>
   gift_cards?: GiftCard[]
   discounts?: Discount[]
+  customer?: CustomerTypes.CustomerDTO
   customer_id?: string
   type?: CartType
   context?: object