v1.2.1-beta/functions refactor

functions/modules/authenticator.js

@@ -0,0 +1,34 @@
+module.exports = (req, res, next) => {
+  res.set('Access-Control-Allow-Origin', ['*']);
+  if (req.method === 'OPTIONS') {
+    res.status(200).send();
+    return next();
+  }
+  const token = req.headers.authorization.split(' ')[1];
+  const reqToken = token.split(':')[0];
+  const reqUid = token.split(':')[1];
+  admin
+    .auth()
+    .verifyIdToken(reqToken)
+    .then((user) => {
+      if (user.uid === reqUid) {
+        console.info('Verified Token - UID - ', reqUid);
+        if (req.method === 'POST') {
+          const bodydata = JSON.parse(req.body);
+          bodydata.uid = user.uid;
+          req.body = JSON.stringify(bodydata);
+        }
+        if (req.method === 'GET' || req.method === 'DELETE') {
+          req.body = JSON.stringify({ uid: user.uid });
+        }
+        return next();
+      } else {
+        return res.status(401).send({ message: 'Unauthorized' });
+      }
+    })
+    .catch((err) => {
+      console.error('Failed Auth - ', req.headers.authorization, '\n', err);
+      return res.status(500).send({ message: 'Unable to verify user token', ...err });
+    });
+  return null;
+};