add multer and cloudinary files for file upload

.env.sample

@@ -4,4 +4,8 @@ CORS_ORIGIN=*
 ACCESS_TOKEN_SECRET=chai-aur-code
 ACCESS_TOKEN_EXPIRY=1d
 REFRESH_TOKEN_SECRET=chai-aur-backend
-REFRESH_TOKEN_EXPIRY=10d
+REFRESH_TOKEN_EXPIRY=10d
+
+CLOUDINARY_CLOUD_NAME=
+CLOUDINARY_API_KEY=
+CLOUDINARY_API_SECRET=

package.json

@@ -20,12 +20,14 @@
   },
   "dependencies": {
     "bcrypt": "^5.1.1",
+    "cloudinary": "^1.41.0",
     "cookie-parser": "^1.4.6",
     "cors": "^2.8.5",
     "dotenv": "^16.3.1",
     "express": "^4.18.2",
     "jsonwebtoken": "^9.0.2",
     "mongoose": "^8.0.0",
-    "mongoose-aggregate-paginate-v2": "^1.0.6"
+    "mongoose-aggregate-paginate-v2": "^1.0.6",
+    "multer": "^1.4.5-lts.1"
   }
 }

src/middlewares/multer.middleware.js

@@ -0,0 +1,15 @@
+import multer from "multer";
+
+const storage = multer.diskStorage({
+    destination: function (req, file, cb) {
+      cb(null, "./public/temp")
+    },
+    filename: function (req, file, cb) {
+
+      cb(null, file.originalname)
+    }
+  })
+
+export const upload = multer({ 
+    storage, 
+})

src/utils/cloudinary.js

@@ -0,0 +1,30 @@
+import {v2 as cloudinary} from "cloudinary"
+import fs from "fs"
+
+
+cloudinary.config({ 
+  cloud_name: process.env.CLOUDINARY_CLOUD_NAME, 
+  api_key: process.env.CLOUDINARY_API_KEY, 
+  api_secret: process.env.CLOUDINARY_API_SECRET 
+});
+
+const uploadOnCloudinary = async (localFilePath) => {
+    try {
+        if (!localFilePath) return null
+        //upload the file on cloudinary
+        const response = await cloudinary.uploader.upload(localFilePath, {
+            resource_type: "auto"
+        })
+        // file has been uploaded successfull
+        console.log("file is uploaded on cloudinary ", response.url);
+        return response;
+
+    } catch (error) {
+        fs.unlinkSync(localFilePath) // remove the locally saved temporary file as the upload operation got failed
+        return null;
+    }
+}
+
+
+
+export {uploadOnCloudinary}