feat(core-flows,medusa,types): add automatic-taxes to region + generate tax lines endpoint (#6667)

what:

- endpoint to generate tax lines
- update workflows to force calculate tax lines with a flag
- added automatic_taxes to region

.changeset/metal-tomatoes-cheat.md

@@ -0,0 +1,7 @@
+---
+"@medusajs/core-flows": patch
+"@medusajs/medusa": patch
+"@medusajs/types": patch
+---
+
+feat(core-flows,medusa,types): add automatic-taxes to region + generate tax lines endpoint

integration-tests/modules/__tests__/cart/store/carts.spec.ts

@@ -20,7 +20,7 @@ import adminSeeder from "../../../../helpers/admin-seeder"
 import { createAuthenticatedCustomer } from "../../../helpers/create-authenticated-customer"
 import { setupTaxStructure } from "../../fixtures"
 
-jest.setTimeout(50000)
+jest.setTimeout(100000)
 
 const env = { MEDUSA_FF_MEDUSA_V2: true }
 
@@ -327,6 +327,11 @@ medusaIntegrationTestRunner({
         it("should update a cart with promo codes with a replace action", async () => {
           await setupTaxStructure(taxModule)
 
+          const region = await regionModule.create({
+            name: "US",
+            currency_code: "usd",
+          })
+
           const targetRules = [
             {
               attribute: "product_id",
@@ -365,6 +370,7 @@ medusaIntegrationTestRunner({
           const cart = await cartModule.create({
             currency_code: "usd",
             email: "tony@stark.com",
+            region_id: region.id,
             shipping_address: {
               address_1: "test address 1",
               address_2: "test address 2",
@@ -393,10 +399,12 @@ medusaIntegrationTestRunner({
             },
           ])
 
-          await remoteLink.create({
+          await remoteLink.create([
-            [Modules.CART]: { cart_id: cart.id },
+            {
-            [Modules.PROMOTION]: { promotion_id: appliedPromotion.id },
+              [Modules.CART]: { cart_id: cart.id },
-          })
+              [Modules.PROMOTION]: { promotion_id: appliedPromotion.id },
+            },
+          ])
 
           // Should remove earlier adjustments from other promocodes
           let updated = await api.post(`/store/carts/${cart.id}`, {
@@ -455,6 +463,78 @@ medusaIntegrationTestRunner({
           )
         })
 
+        it("should not generate tax lines if region is not present or automatic taxes is false", async () => {
+          await setupTaxStructure(taxModule)
+
+          const region = await regionModule.create({
+            name: "US",
+            currency_code: "usd",
+            automatic_taxes: false,
+          })
+
+          const cart = await cartModule.create({
+            currency_code: "usd",
+            email: "tony@stark.com",
+            shipping_address: {
+              address_1: "test address 1",
+              address_2: "test address 2",
+              city: "NY",
+              country_code: "US",
+              province: "NY",
+              postal_code: "94016",
+            },
+            items: [
+              {
+                id: "item-1",
+                unit_price: 2000,
+                quantity: 1,
+                title: "Test item",
+                product_id: "prod_tshirt",
+              } as any,
+            ],
+          })
+
+          let updated = await api.post(`/store/carts/${cart.id}`, {
+            email: "another@tax.com",
+          })
+
+          expect(updated.status).toEqual(200)
+          expect(updated.data.cart).toEqual(
+            expect.objectContaining({
+              id: cart.id,
+              items: [
+                expect.objectContaining({
+                  id: "item-1",
+                  tax_lines: [],
+                  adjustments: [],
+                }),
+              ],
+            })
+          )
+
+          await cartModule.update(cart.id, {
+            region_id: region.id,
+          })
+
+          updated = await api.post(`/store/carts/${cart.id}`, {
+            email: "another@tax.com",
+          })
+
+          expect(updated.status).toEqual(200)
+          expect(updated.data.cart).toEqual(
+            expect.objectContaining({
+              id: cart.id,
+              items: [
+                expect.objectContaining({
+                  id: "item-1",
+                  adjustments: [],
+                  tax_lines: [],
+                }),
+              ],
+            })
+          )
+        })
+
         it("should update a cart's region, sales channel, customer data and tax lines", async () => {
           await setupTaxStructure(taxModule)
 
@@ -598,7 +678,7 @@ medusaIntegrationTestRunner({
         })
       })
 
-      describe("GET /store/carts/:id", () => {
+      describe("POST /store/carts/:id", () => {
         it("should create and update a cart", async () => {
           const region = await regionModule.create({
             name: "US",
@@ -700,6 +780,11 @@ medusaIntegrationTestRunner({
         it("should add item to cart", async () => {
           await setupTaxStructure(taxModule)
 
+          const region = await regionModule.create({
+            name: "US",
+            currency_code: "usd",
+          })
+
           const customer = await customerModule.create({
             email: "tony@stark-industries.com",
           })
@@ -723,6 +808,7 @@ medusaIntegrationTestRunner({
           const cart = await cartModule.create({
             currency_code: "usd",
             customer_id: customer.id,
+            region_id: region.id,
             shipping_address: {
               customer_id: customer.id,
               address_1: "test address 1",
@@ -905,6 +991,99 @@ medusaIntegrationTestRunner({
           )
         })
       })
+
+      describe("POST /store/carts/:id/taxes", () => {
+        it("should update a carts tax lines when region.automatic_taxes is false", async () => {
+          await setupTaxStructure(taxModule)
+
+          const region = await regionModule.create({
+            name: "US",
+            currency_code: "usd",
+            automatic_taxes: false,
+          })
+
+          const cart = await cartModule.create({
+            currency_code: "usd",
+            region_id: region.id,
+            shipping_address: {
+              address_1: "test address 1",
+              address_2: "test address 2",
+              city: "NY",
+              country_code: "US",
+              province: "NY",
+              postal_code: "94016",
+            },
+            items: [
+              {
+                id: "item-1",
+                unit_price: 2000,
+                quantity: 1,
+                title: "Test item",
+                product_id: "prod_tshirt",
+              } as any,
+            ],
+          })
+
+          let updated = await api.post(`/store/carts/${cart.id}/taxes`, {})
+
+          expect(updated.status).toEqual(200)
+
+          // TODO: validate tax totals when calculations are ready
+          expect(updated.data.cart).toEqual(
+            expect.objectContaining({
+              id: cart.id,
+              items: [
+                expect.objectContaining({
+                  id: "item-1",
+                  tax_lines: [
+                    expect.objectContaining({
+                      description: "NY Default Rate",
+                      code: "NYDEFAULT",
+                      rate: 6,
+                      provider_id: "system",
+                    }),
+                  ],
+                  adjustments: [],
+                }),
+              ],
+            })
+          )
+        })
+
+        it("should throw error when shipping is not present", async () => {
+          await setupTaxStructure(taxModule)
+
+          const region = await regionModule.create({
+            name: "US",
+            currency_code: "usd",
+            automatic_taxes: false,
+          })
+
+          const cart = await cartModule.create({
+            currency_code: "usd",
+            region_id: region.id,
+            items: [
+              {
+                id: "item-1",
+                unit_price: 2000,
+                quantity: 1,
+                title: "Test item",
+                product_id: "prod_tshirt",
+              } as any,
+            ],
+          })
+
+          let error = await api
+            .post(`/store/carts/${cart.id}/taxes`, {})
+            .catch((e) => e)
+
+          expect(error.response.status).toEqual(400)
+          expect(error.response.data).toEqual({
+            type: "invalid_data",
+            message: "country code is required to calculate taxes",
+          })
+        })
+      })
     })
   },
 })

packages/core-flows/src/definition/cart/steps/get-item-tax-lines.ts

@@ -9,6 +9,7 @@ import {
   TaxableItemDTO,
   TaxableShippingDTO,
 } from "@medusajs/types"
+import { MedusaError } from "@medusajs/utils"
 import { StepResponse, createStep } from "@medusajs/workflows-sdk"
 import { ModuleRegistrationName } from "../../../../../modules-sdk/dist"
 
@@ -16,14 +17,28 @@ interface StepInput {
   cart: CartWorkflowDTO
   items: CartLineItemDTO[]
   shipping_methods: CartShippingMethodDTO[]
+  force_tax_calculation?: boolean
 }
 
 function normalizeTaxModuleContext(
-  cart: CartWorkflowDTO
+  cart: CartWorkflowDTO,
+  forceTaxCalculation: boolean
 ): TaxCalculationContext | null {
   const address = cart.shipping_address
+  const shouldCalculateTax = forceTaxCalculation || cart.region?.automatic_taxes
 
-  if (!address || !address.country_code) {
+  if (!shouldCalculateTax) {
+    return null
+  }
+
+  if (forceTaxCalculation && !address?.country_code) {
+    throw new MedusaError(
+      MedusaError.Types.INVALID_DATA,
+      `country code is required to calculate taxes`
+    )
+  }
+
+  if (!address?.country_code) {
     return null
   }
 
@@ -83,12 +98,17 @@ export const getItemTaxLinesStepId = "get-item-tax-lines"
 export const getItemTaxLinesStep = createStep(
   getItemTaxLinesStepId,
   async (data: StepInput, { container }) => {
-    const { cart, items, shipping_methods: shippingMethods } = data
+    const {
+      cart,
+      items,
+      shipping_methods: shippingMethods,
+      force_tax_calculation: forceTaxCalculation = false,
+    } = data
     const taxService = container.resolve<ITaxModuleService>(
       ModuleRegistrationName.TAX
     )
 
-    const taxContext = normalizeTaxModuleContext(cart)
+    const taxContext = normalizeTaxModuleContext(cart, forceTaxCalculation)
 
     if (!taxContext) {
       return new StepResponse({

packages/core-flows/src/definition/cart/steps/update-tax-lines.ts

@@ -10,6 +10,7 @@ interface StepInput {
   cart_or_cart_id: CartWorkflowDTO | string
   items?: CartLineItemDTO[]
   shipping_methods?: CartShippingMethodDTO[]
+  force_tax_calculation?: boolean
 }
 
 export const updateTaxLinesStepId = "update-tax-lines-step"

packages/core-flows/src/definition/cart/workflows/update-tax-lines.ts

@@ -18,6 +18,8 @@ const cartFields = [
   "id",
   "currency_code",
   "email",
+  "region.id",
+  "region.automatic_taxes",
   "items.id",
   "items.variant_id",
   "items.product_id",
@@ -62,6 +64,7 @@ type WorkflowInput = {
   cart_or_cart_id: string | CartWorkflowDTO
   items?: CartLineItemDTO[]
   shipping_methods?: CartShippingMethodDTO[]
+  force_tax_calculation?: boolean
 }
 
 export const updateTaxLinesWorkflowId = "update-tax-lines"
@@ -79,6 +82,7 @@ export const updateTaxLinesWorkflow = createWorkflow(
         items: data.input.items || data.cart.items,
         shipping_methods:
           data.input.shipping_methods || data.cart.shipping_methods,
+        force_tax_calculation: data.input.force_tax_calculation,
       }))
     )
 

packages/medusa/src/api-v2/store/carts/[id]/taxes/route.ts

@@ -0,0 +1,43 @@
+import { updateTaxLinesWorkflow } from "@medusajs/core-flows"
+import { Modules } from "@medusajs/modules-sdk"
+import {
+  ContainerRegistrationKeys,
+  remoteQueryObjectFromString,
+} from "@medusajs/utils"
+import { MedusaRequest, MedusaResponse } from "../../../../../types/routing"
+import { defaultStoreCartFields } from "../../query-config"
+import { StorePostCartsCartTaxesReq } from "../../validators"
+
+export const POST = async (
+  req: MedusaRequest<StorePostCartsCartTaxesReq>,
+  res: MedusaResponse
+) => {
+  const workflow = updateTaxLinesWorkflow(req.scope)
+
+  const { errors } = await workflow.run({
+    input: {
+      cart_or_cart_id: req.params.id,
+      force_tax_calculation: true,
+    },
+    throwOnError: false,
+  })
+
+  if (Array.isArray(errors) && errors[0]) {
+    throw errors[0].error
+  }
+
+  const remoteQuery = req.scope.resolve(ContainerRegistrationKeys.REMOTE_QUERY)
+
+  const query = remoteQueryObjectFromString({
+    entryPoint: Modules.CART,
+    fields: defaultStoreCartFields,
+  })
+
+  const [cart] = await remoteQuery(query, {
+    cart: { id: req.params.id },
+  })
+
+  // TODO: wrap result with totals when totals calculation is ready
+
+  res.status(200).json({ cart })
+}

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

@@ -66,6 +66,7 @@ export const defaultStoreCartFields = [
   "region.id",
   "region.name",
   "region.currency_code",
+  "region.automatic_taxes",
   "sales_channel_id",
 
   // TODO: To be updated when payment sessions are introduces in the Rest API

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

@@ -114,3 +114,5 @@ export class StorePostCartsCartReq {
   // @Type(() => Discount)
   // discounts?: Discount[]
 }
+
+export class StorePostCartsCartTaxesReq {}

packages/region/integration-tests/__tests__/region-module.spec.ts

@@ -34,6 +34,7 @@ describe("Region Module Service", () => {
     const createdRegion = await service.create({
       name: "Europe",
       currency_code: "EUR",
+      automatic_taxes: false,
     })
 
     expect(createdRegion).toEqual(
@@ -42,6 +43,7 @@ describe("Region Module Service", () => {
         name: "Europe",
         currency_code: "eur",
         countries: [],
+        automatic_taxes: false,
       })
     )
 
@@ -75,6 +77,7 @@ describe("Region Module Service", () => {
         id: region.id,
         name: "North America",
         currency_code: "usd",
+        automatic_taxes: true,
         countries: [
           expect.objectContaining({
             display_name: "Canada",
@@ -148,6 +151,7 @@ describe("Region Module Service", () => {
       name: "Americas",
       currency_code: "MXN",
       countries: ["us", "mx"],
+      automatic_taxes: false,
     })
 
     const latestRegion = await service.retrieve(createdRegion.id, {
@@ -158,6 +162,7 @@ describe("Region Module Service", () => {
       id: createdRegion.id,
       name: "Americas",
       currency_code: "mxn",
+      automatic_taxes: false,
     })
     expect(latestRegion.countries.map((c) => c.iso_2)).toEqual(["mx", "us"])
   })

packages/region/src/migrations/RegionModuleSetup20240205173216.ts

@@ -20,9 +20,10 @@ ALTER TABLE "region" DROP CONSTRAINT IF EXISTS "FK_3bdd5896ec93be2f1c62a3309a5";
 ALTER TABLE "region" DROP CONSTRAINT IF EXISTS "FK_91f88052197680f9790272aaf5b";
 ${generatePostgresAlterColummnIfExistStatement(
   "region",
-  ["tax_rate", "gift_cards_taxable", "automatic_taxes", "includes_tax"],
+  ["tax_rate", "gift_cards_taxable", "includes_tax"],
   "DROP NOT NULL"
 )}
+ALTER TABLE "region" ADD COLUMN IF NOT EXISTS "automatic_taxes" BOOLEAN NOT NULL DEFAULT TRUE;
 CREATE INDEX IF NOT EXISTS "IDX_region_deleted_at" ON "region" ("deleted_at") WHERE "deleted_at" IS NOT NULL;
 -- Create or update "region_country" table
 CREATE TABLE IF NOT EXISTS "region_country" (

packages/region/src/models/region.ts

@@ -6,7 +6,6 @@ import {
   Entity,
   Filter,
   Index,
-  ManyToOne,
   OnInit,
   OneToMany,
   OptionalProps,
@@ -31,6 +30,9 @@ export default class Region {
   @Property({ columnType: "text" })
   currency_code: string
 
+  @Property({ columnType: "boolean" })
+  automatic_taxes = true
+
   @OneToMany(() => Country, (country) => country.region)
   countries = new Collection<Country>(this)
 

packages/types/src/cart/workflows.ts

@@ -1,5 +1,6 @@
 import { CustomerDTO } from "../customer"
 import { ProductDTO } from "../product"
+import { RegionDTO } from "../region"
 import { CartDTO, CartLineItemDTO } from "./common"
 import { UpdateLineItemDTO } from "./mutations"
 
@@ -98,4 +99,5 @@ export interface CreatePaymentCollectionForCartWorkflowInputDTO {
 export interface CartWorkflowDTO extends CartDTO {
   customer?: CustomerDTO
   product?: ProductDTO
+  region?: RegionDTO
 }

packages/types/src/region/common.ts

@@ -19,6 +19,11 @@ export interface RegionDTO {
    */
   currency_code: string
 
+  /**
+   * Setting to indicate whether taxes need to be applied automatically
+   */
+  automatic_taxes: boolean
+
   /**
    * The countries of the region.
    */

packages/types/src/region/mutations.ts

@@ -10,6 +10,10 @@ export interface CreateRegionDTO {
    * The currency code of the region.
    */
   currency_code: string
+  /**
+   * Setting to indicate whether taxes need to be applied automatically
+   */
+  automatic_taxes?: boolean
   /**
    * The region's countries.
    */
@@ -33,6 +37,10 @@ export interface UpsertRegionDTO {
    * The currency code of the region.
    */
   currency_code?: string
+  /**
+   * Setting to indicate whether taxes need to be applied automatically
+   */
+  automatic_taxes?: boolean
   /**
    * The region's countries.
    */
@@ -52,6 +60,10 @@ export interface UpdateRegionDTO {
    * The currency code of the region.
    */
   currency_code?: string
+  /**
+   * Setting to indicate whether taxes need to be applied automatically
+   */
+  automatic_taxes?: boolean
   /**
    * The region's countries.
    */