feat(medusa): Order preview endpoint (#8144)

* feat: Add order preview endpoint

* remove log

* add test

* add note

packages/medusa/src/api/admin/orders/[id]/preview/route.ts

@@ -0,0 +1,19 @@
+import { ModuleRegistrationName } from "@medusajs/utils"
+import {
+  AuthenticatedMedusaRequest,
+  MedusaResponse,
+} from "../../../../../types/routing"
+
+export const GET = async (
+  req: AuthenticatedMedusaRequest,
+  res: MedusaResponse
+) => {
+  const { id } = req.params
+
+  // NOTE: Consider replacing with remoteQuery when possible
+  const orderModuleService = req.scope.resolve(ModuleRegistrationName.ORDER)
+
+  const order = await orderModuleService.previewOrderChange(id)
+
+  res.status(200).json({ order })
+}

packages/medusa/src/api/admin/orders/middlewares.ts

@@ -33,6 +33,16 @@ export const adminOrderRoutesMiddlewares: MiddlewareRoute[] = [
       ),
     ],
   },
+  {
+    method: ["GET"],
+    matcher: "/admin/orders/:id/preview",
+    middlewares: [
+      validateAndTransformQuery(
+        AdminGetOrdersOrderParams,
+        QueryConfig.retrieveTransformQueryConfig
+      ),
+    ],
+  },
   {
     method: ["POST"],
     matcher: "/admin/orders/:id/archive",