db: added upload image functionality with upload/

Author: krishpranav

db/multer.js

@@ -0,0 +1,34 @@
+import multer from "multer";
+import { v4 as uuidv4 } from "uuid";
+import { AppError } from "../utils/AppError.js";
+
+const createMulterUploader = (folderName) => {
+    const storage = multer.diskStorage({
+        destination: (req, file, cb) => {
+            cb(null, `uploads/${folderName}`);
+        },
+        filename: (req, file, cb) => {
+            cb(null, uuidv4() + " - " + file.originalname);
+        },
+    });
+
+    function fileFilter(req, file, cb) {
+        if (file.mimetype.startsWith("image/")) {
+            cb(null, true);
+        } else {
+            cb(new AppError("Not supporting this mimetype", 401), false);
+        }
+    }
+
+    const upload = multer({ storage, fileFilter });
+
+    return upload;
+};
+
+export const uploadSingleFile = (fieldName, folderName) => {
+    return createMulterUploader(folderName).single(fieldName);
+};
+
+export const uploadMultipleFiles = (arrayOfFields, folderName) => {
+    return createMulterUploader(folderName).fields(arrayOfFields);
+};