feat: Add skeleton for supporting product imports in BE (#8232)

packages/medusa/src/api/admin/products/import/route.ts

@@ -0,0 +1,30 @@
+import {
+  AuthenticatedMedusaRequest,
+  MedusaResponse,
+} from "../../../../types/routing"
+import { HttpTypes } from "@medusajs/types"
+import { MedusaError } from "@medusajs/utils"
+import { importProductsWorkflow } from "@medusajs/core-flows"
+
+export const POST = async (
+  req: AuthenticatedMedusaRequest<HttpTypes.AdminImportProductRequest>,
+  res: MedusaResponse<HttpTypes.AdminImportProductResponse>
+) => {
+  const input = req.file as Express.Multer.File
+
+  if (!input) {
+    throw new MedusaError(
+      MedusaError.Types.INVALID_DATA,
+      "No file was uploaded for importing"
+    )
+  }
+
+  const { transaction } = await importProductsWorkflow(req.scope).run({
+    input: {
+      filename: input.originalname,
+      fileContent: input.buffer.toString("utf-8"),
+    },
+  })
+
+  res.status(202).json({ workflow_id: transaction.transactionId })
+}

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

@@ -28,6 +28,12 @@ import {
   AdminUpdateProductVariant,
   AdminUpdateVariantInventoryItem,
 } from "./validators"
+import multer from "multer"
+
+// TODO: For now we keep the files in memory, as that's how they get passed to the workflows
+// This will need revisiting once we are closer to prod-ready v2, since with workflows and potentially
+// services on other machines using streams is not as simple as it used to be.
+const upload = multer({ storage: multer.memoryStorage() })
 
 export const adminProductRoutesMiddlewares: MiddlewareRoute[] = [
   {
@@ -81,12 +87,17 @@ export const adminProductRoutesMiddlewares: MiddlewareRoute[] = [
       ),
     ],
   },
+  {
+    method: ["POST"],
+    matcher: "/admin/products/import",
+    middlewares: [upload.single("file")],
+  },
   {
     method: ["GET"],
     matcher: "/admin/products/:id",
     middlewares: [
       unlessPath(
-        /.*\/products\/(batch|export)/,
+        /.*\/products\/(batch|export|import)/,
         validateAndTransformQuery(
           AdminGetProductParams,
           QueryConfig.retrieveProductQueryConfig
@@ -99,11 +110,11 @@ export const adminProductRoutesMiddlewares: MiddlewareRoute[] = [
     matcher: "/admin/products/:id",
     middlewares: [
       unlessPath(
-        /.*\/products\/(batch|export)/,
+        /.*\/products\/(batch|export|import)/,
         validateAndTransformBody(AdminUpdateProduct)
       ),
       unlessPath(
-        /.*\/products\/(batch|export)/,
+        /.*\/products\/(batch|export|import)/,
         validateAndTransformQuery(
           AdminGetProductParams,
           QueryConfig.retrieveProductQueryConfig
@@ -116,7 +127,7 @@ export const adminProductRoutesMiddlewares: MiddlewareRoute[] = [
     matcher: "/admin/products/:id",
     middlewares: [
       unlessPath(
-        /.*\/products\/(batch|export)/,
+        /.*\/products\/(batch|export|import)/,
         validateAndTransformQuery(
           AdminGetProductParams,
           QueryConfig.retrieveProductQueryConfig