feat: Cart Customer link + create cart with customer (#6426)

packages/medusa/src/api-v2/store/carts/middlewares.ts

@@ -1,5 +1,6 @@
 import { transformBody, transformQuery } from "../../../api/middlewares"
 import { MiddlewareRoute } from "../../../loaders/helpers/routing/types"
+import { authenticate } from "../../../utils/authenticate-middleware"
 import * as QueryConfig from "./query-config"
 import {
   StoreGetCartsCartParams,
@@ -8,6 +9,15 @@ import {
 } from "./validators"
 
 export const storeCartRoutesMiddlewares: MiddlewareRoute[] = [
+  {
+    method: "ALL",
+    matcher: "/store/carts*",
+    middlewares: [
+      authenticate("store", ["session", "bearer"], {
+        allowUnauthenticated: true,
+      }),
+    ],
+  },
   {
     method: ["GET"],
     matcher: "/store/carts/:id",

packages/medusa/src/api-v2/store/carts/query-config.ts

@@ -10,6 +10,8 @@ export const defaultStoreCartFields = [
   "items.title",
   "items.quantity",
   "items.unit_price",
+  "customer.id",
+  "customer.email",
   "shipping_address.id",
   "shipping_address.first_name",
   "shipping_address.last_name",
@@ -39,6 +41,7 @@ export const defaultStoreCartFields = [
 export const defaultStoreCartRelations = [
   "items",
   "region",
+  "customer",
   "shipping_address",
   "billing_address",
   "shipping_methods",
@@ -47,6 +50,7 @@ export const defaultStoreCartRelations = [
 export const allowedRelations = [
   "items",
   "region",
+  "customer",
   "shipping_address",
   "billing_address",
   "shipping_methods",

packages/medusa/src/api-v2/store/carts/route.ts

@@ -1,14 +1,23 @@
 import { createCartWorkflow } from "@medusajs/core-flows"
-import { CreateCartDTO } from "@medusajs/types"
+import { CreateCartWorkflowInputDTO } from "@medusajs/types"
 import { remoteQueryObjectFromString } from "@medusajs/utils"
 import { MedusaRequest, MedusaResponse } from "../../../types/routing"
 import { defaultStoreCartFields } from "../carts/query-config"
+import { StorePostCartReq } from "./validators"
 
 export const POST = async (req: MedusaRequest, res: MedusaResponse) => {
-  const workflow = createCartWorkflow(req.scope)
+  const input = req.validatedBody as StorePostCartReq
+  const workflowInput: CreateCartWorkflowInputDTO = {
+    ...input,
+  }
 
-  const { result, errors } = await workflow.run({
-    input: req.validatedBody as CreateCartDTO,
+  // If the customer is logged in, we auto-assign them to the cart
+  if (req.auth_user?.app_metadata?.customer_id) {
+    workflowInput.customer_id = req.auth_user!.app_metadata?.customer_id
+  }
+
+  const { result, errors } = await createCartWorkflow(req.scope).run({
+    input: workflowInput,
     throwOnError: false,
   })
 
@@ -18,7 +27,7 @@ export const POST = async (req: MedusaRequest, res: MedusaResponse) => {
 
   const remoteQuery = req.scope.resolve("remoteQuery")
 
-  const variables = { id: result[0].id }
+  const variables = { id: result.id }
 
   const query = remoteQueryObjectFromString({
     entryPoint: "cart",

packages/medusa/src/api-v2/store/carts/validators.ts

@@ -29,15 +29,10 @@ export class StorePostCartReq {
   @IsString()
   region_id?: string
 
-  @IsOptional()
-  @IsString()
-  customer_id?: string
-
   @IsOptional()
   @IsString()
   email?: string
 
-  // TODO: Remove in favor of using region currencies, as in the core
   @IsOptional()
   @IsString()
   currency_code?: string
@@ -74,10 +69,6 @@ export class StorePostCartsCartReq {
   @IsType([AddressPayload, String])
   shipping_address?: AddressPayload | string
 
-  @IsString()
-  @IsOptional()
-  customer_id?: string
-
   @IsEmail()
   @IsOptional()
   sales_channel_id?: string

packages/medusa/src/types/common.ts

@@ -1,5 +1,13 @@
 import "reflect-metadata"
 
+import { Transform, Type } from "class-transformer"
+import {
+  IsDate,
+  IsNumber,
+  IsObject,
+  IsOptional,
+  IsString,
+} from "class-validator"
 import {
   FindManyOptions,
   FindOneOptions,
@@ -8,20 +16,12 @@ import {
   FindOptionsWhere,
   OrderByCondition,
 } from "typeorm"
-import {
-  IsDate,
-  IsNumber,
-  IsObject,
-  IsOptional,
-  IsString,
-} from "class-validator"
-import { Transform, Type } from "class-transformer"
 
-import { BaseEntity } from "../interfaces"
-import { ClassConstructor } from "./global"
 import { FindOptionsOrder } from "typeorm/find-options/FindOptionsOrder"
 import { FindOptionsRelations } from "typeorm/find-options/FindOptionsRelations"
+import { BaseEntity } from "../interfaces"
 import { transformDate } from "../utils/validators/date-transform"
+import { ClassConstructor } from "./global"
 
 /**
  * Utility type used to remove some optional attributes (coming from K) from a type T