Refactor utils and organize routes/schema

utils/cron.js

@@ -0,0 +1,21 @@
+const config = require('../config');
+let Session = require('../schema/session.model');
+const maxSessionLength = config.maxSessionLength;
+
+// purgeSessions() purge sessions that have existed for longer than maxSessionLength
+const purgeSessions = () => {
+    console.log("Purging old sessions...");
+    Session.find({}, (err, arr) => {
+        for (let i = 0; i < arr.length; i++) {
+            let timeDifference = new Date().getTime() - arr[i].date;
+            let dayDifference = timeDifference / (1000 * 3600 * 24);
+            if (dayDifference > maxSessionLength) {
+                arr[i].delete().catch(e => {
+                    console.log(e);
+                });
+            }
+        }
+    });
+}
+
+module.exports.purgeSessions = purgeSessions;