chore: comments addressing

src/controllers/FileUploadController.ts

@@ -0,0 +1,36 @@
+import { uuidv4 } from '@sasjs/utils'
+import { getSessionController } from '.'
+const multer = require('multer')
+
+export class FileUploadController {
+	private storage = multer.diskStorage({
+		destination: function (req: any, file: any, cb: any) {
+			//Sending the intercepted files to the sessions subfolder
+			cb(null, req.sasSession.path)
+		},
+		filename: function (req: any, file: any, cb: any) {
+			//req_file prefix + unique hash added to sas request files
+			cb(null, `req_file_${uuidv4().replace(/-/gm, '')}`)
+		}
+	})
+		
+	private upload = multer({ storage: this.storage })
+	
+	//It will intercept request and generate uniqe uuid to be used as a subfolder name
+	//that will store the files uploaded
+	public preuploadMiddleware = async (req: any, res: any, next: any) => {
+		let session
+	
+		const sessionController = getSessionController()
+		session = await sessionController.getSession()
+		session.inUse = true
+	
+		req.sasSession = session
+	
+		next()
+	}
+
+	public getMulterUploadObject() {
+		return this.upload
+	}
+}