feat: add needed methods to the file module and providers (#12325)

packages/modules/providers/file-local/src/index.ts

@@ -1,5 +1,6 @@
 import { ModuleProvider, Modules } from "@medusajs/framework/utils"
 import { LocalFileService } from "./services/local-file"
+export { LocalFileService }
 
 const services = [LocalFileService]
 

packages/modules/providers/file-local/src/services/local-file.ts

@@ -3,8 +3,10 @@ import {
   AbstractFileProviderService,
   MedusaError,
 } from "@medusajs/framework/utils"
+import { createReadStream } from "fs"
 import fs from "fs/promises"
 import path from "path"
+import type { Readable } from "stream"
 
 export class LocalFileService extends AbstractFileProviderService {
   static identifier = "localfs"
@@ -83,6 +85,24 @@ export class LocalFileService extends AbstractFileProviderService {
     return
   }
 
+  async getAsStream(file: FileTypes.ProviderGetFileDTO): Promise<Readable> {
+    const baseDir = file.fileKey.startsWith("private-")
+      ? this.privateUploadDir_
+      : this.uploadDir_
+
+    const filePath = this.getUploadFilePath(baseDir, file.fileKey)
+    return createReadStream(filePath)
+  }
+
+  async getAsBuffer(file: FileTypes.ProviderGetFileDTO): Promise<Buffer> {
+    const baseDir = file.fileKey.startsWith("private-")
+      ? this.privateUploadDir_
+      : this.uploadDir_
+
+    const filePath = this.getUploadFilePath(baseDir, file.fileKey)
+    return fs.readFile(filePath)
+  }
+
   // The local file provider doesn't support presigned URLs for private files (i.e files not placed in /static).
   async getPresignedDownloadUrl(
     file: FileTypes.ProviderGetFileDTO