Added backend folder in Bhakti's branch for Salvi to make changes.

Backend/Middlewares/authentication.js

@@ -0,0 +1,49 @@
+const jwt = require("jsonwebtoken");
+const User = require("../Models/user.model.js");
+const dotenv = require("dotenv");
+dotenv.config({
+  path: "./.env",
+});
+
+async function checkAuthenticated(req, res, next) {
+  const tokenValue = req.cookies[process.env.TOKEN_NAME];
+
+  console.log("I am called", tokenValue);
+  if (!tokenValue) {
+    return res.status(404).json({
+      success: false,
+      message: "User is not logged in.",
+    });
+  }
+  try {
+    const payload = await jwt.verify(
+      tokenValue,
+      process.env.REFRESH_TOKEN_SECRET
+    );
+
+    if (!payload) {
+      return next();
+    }
+
+    req.user = payload;
+    return next();
+  } catch (error) {
+    return next();
+  }
+}
+
+function authorizeRoles(...roles) {
+  return async (req, res, next) => {
+    if (!roles.includes(req.user.role)) {
+      return res.status(401).json({
+        success: false,
+        message: "You are unauthorised to access this resource",
+      });
+      return next();
+    }
+
+    return next();
+  };
+}
+
+module.exports = { checkAuthenticated, authorizeRoles };