feat: Region PaymentProvider link (#6577)

**What**

- Introduce link between Region and PaymentProvider
- Introduce API endpoint `GET /store/regions/:id/payment-providers` for retrieving providers by region
- Add tests for both

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

@@ -1,23 +1,23 @@
 import { MiddlewaresConfig } from "../loaders/helpers/routing/types"
 import { adminApiKeyRoutesMiddlewares } from "./admin/api-keys/middlewares"
 import { adminCampaignRoutesMiddlewares } from "./admin/campaigns/middlewares"
+import { adminCurrencyRoutesMiddlewares } from "./admin/currencies/middlewares"
 import { adminCustomerGroupRoutesMiddlewares } from "./admin/customer-groups/middlewares"
 import { adminCustomerRoutesMiddlewares } from "./admin/customers/middlewares"
 import { adminInviteRoutesMiddlewares } from "./admin/invites/middlewares"
 import { adminPromotionRoutesMiddlewares } from "./admin/promotions/middlewares"
 import { adminRegionRoutesMiddlewares } from "./admin/regions/middlewares"
-import { adminTaxRegionRoutesMiddlewares } from "./admin/tax-regions/middlewares"
 import { adminStoreRoutesMiddlewares } from "./admin/stores/middlewares"
 import { adminTaxRateRoutesMiddlewares } from "./admin/tax-rates/middlewares"
+import { adminTaxRegionRoutesMiddlewares } from "./admin/tax-regions/middlewares"
 import { adminUserRoutesMiddlewares } from "./admin/users/middlewares"
 import { adminWorkflowsExecutionsMiddlewares } from "./admin/workflows-executions/middlewares"
 import { authRoutesMiddlewares } from "./auth/middlewares"
+import { hooksRoutesMiddlewares } from "./hooks/middlewares"
 import { storeCartRoutesMiddlewares } from "./store/carts/middlewares"
+import { storeCurrencyRoutesMiddlewares } from "./store/currencies/middlewares"
 import { storeCustomerRoutesMiddlewares } from "./store/customers/middlewares"
 import { storeRegionRoutesMiddlewares } from "./store/regions/middlewares"
-import { hooksRoutesMiddlewares } from "./hooks/middlewares"
-import { adminCurrencyRoutesMiddlewares } from "./admin/currencies/middlewares"
-import { storeCurrencyRoutesMiddlewares } from "./store/currencies/middlewares"
 
 export const config: MiddlewaresConfig = {
   routes: [

packages/medusa/src/api-v2/store/regions/[id]/payment-providers/route.ts

@@ -0,0 +1,20 @@
+import { remoteQueryObjectFromString } from "@medusajs/utils"
+import { MedusaRequest, MedusaResponse } from "../../../../../types/routing"
+
+export const GET = async (req: MedusaRequest, res: MedusaResponse) => {
+  const remoteQuery = req.scope.resolve("remoteQuery")
+
+  const queryObject = remoteQueryObjectFromString({
+    entryPoint: "regions",
+    fields: ["payment_providers.id", "payment_providers.is_enabled"],
+    variables: {
+      id: req.params.id,
+    },
+  })
+
+  const [region] = await remoteQuery(queryObject)
+
+  res.status(200).json({
+    payment_providers: region.payment_providers.filter((pp) => pp.is_enabled),
+  })
+}

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

@@ -24,4 +24,9 @@ export const storeRegionRoutesMiddlewares: MiddlewareRoute[] = [
       ),
     ],
   },
+  {
+    method: ["GET"],
+    matcher: "/store/regions/:id/payment-providers",
+    middlewares: [],
+  },
 ]