add helper: authentication

src/helpers/authentication.js

@@ -0,0 +1,28 @@
+import jwt from 'jsonwebtoken';
+
+const validateUser = (req, res, next) => {
+  let token = req.headers['x-access-token'] || req.headers.authorization;
+
+  if (token) {
+    token = token.slice(7, token.length);
+
+    jwt.verify(token, req.app.get('secretKey'), (err, decoded) => {
+      if (err) {
+        res.json({
+          success: false,
+          message: 'Token is not valid',
+        });
+      } else {
+        req.decoded = decoded;
+        next();
+      }
+    });
+  } else {
+    return res.status(401).json({
+      success: false,
+      message: 'Auth token is not supplied',
+    });
+  }
+};
+
+export default validateUser;