preliminary work for guest account support

app/routes/adduser.ts

@@ -0,0 +1,30 @@
+import type {RequestHandler as Middleware, Router, Request, Response, NextFunction} from 'express';
+import express from "express";
+
+import {db, createUser} from "../db";
+
+const router: Router = express.Router();
+
+const adminCheck: Middleware = (req: Request, res: Response, next: NextFunction) => {
+    //@ts-ignore
+    if (!req.user)
+        return res.status(403).send("You are not authorized to perform this action");
+    else {
+        //@ts-ignore
+        if (req.user.username != "admin")
+            return res.status(403).send("You are not authorized to perform this action");
+        next();
+    }
+}
+
+router.get("/adduser", adminCheck, (req: Request, res: Response, next: NextFunction) => {
+    res.locals.filter = null;
+	res.render("adduser", { user: req.user });
+});
+
+router.post("/adduser", adminCheck, (req: Request, res: Response, next: NextFunction) => {
+    createUser(req.body.username, req.body.password);
+    res.redirect('/');
+});
+
+export default router;