WIP first partially working version without mongodb, using sqlite/sequelize

middlewares/session.js

@@ -0,0 +1,46 @@
+'use strict';
+
+const db = require('../models/db');
+var config = require('config');
+
+module.exports = (req, res, next) => {
+  const token = req.cookies["sdsession"];
+  
+  if (token && token != "null" && token != null) {
+    db.Session.findOne({where: {token: token}})
+      .then(session => {
+        if (!session) {
+          // session not found
+          next();
+        }
+        else db.User.findOne({where: {_id: session.user_id}})
+          .then(user => {
+            if (!user) {
+              res.clearCookie('sdsession');
+
+              if (req.accepts("text/html")) {
+                res.send("Please clear your cookies and try again.");
+              } else if (req.accepts('application/json')) {
+                res.status(403).json({
+                  "error": "token_not_found"
+                });
+              } else {
+                res.send("Please clear your cookies and try again.");
+              }
+              
+            } else {
+              req["token"] = token;
+              req["user"] = user;
+              next();
+            }
+          });
+      })
+      .error(err => {
+        console.error("Session resolve error",err);
+        next();
+      });
+  } else {
+    next();
+  }
+}
+