First part of backend rework

- Added the base data structure for the new database
- Added the new routes for the new database
- Reworked the users endpoints

modules/tokenManager.js

@@ -0,0 +1,40 @@
+/* eslint-disable no-undef */
+import jwt from 'jsonwebtoken';
+import { Level } from 'level';
+import { respondWithStatus } from './requestHandler';
+import { userExists } from './permissionManager';
+
+const db = new Level('tokens', { valueEncoding: 'json' });
+
+export async function generateToken(userId, password) {
+	const token = jwt.sign({ userId: userId, password: password }, process.env.JWT_SECRET, { expiresIn: '7d' });
+	await db.put(token, 'valid');
+	return token;
+}
+
+
+export async function verifyToken(req, res, next) {
+	const token = req.headers.authorization;
+	if (!token) return await respondWithStatus(res, 401, 'No token provided');
+
+	try {
+		const decoded = jwt.verify(token, process.env.JWT_SECRET);
+		req.userId = decoded.userId;
+
+		if (!userExists(userId)) return await respondWithStatus(res, 404, 'User not found');
+		const passwordMatch = await Bun.password.verify(decoded.password, rows[0].password);
+		if (!passwordMatch) return await respondWithStatus(res, 401, 'Token is invalid');
+		const tokenStatus = await db.get(token);
+		if (tokenStatus != 'valid') {
+			return await respondWithStatus(res, 401, 'Token has been revoked ');
+		}
+		next();
+	}
+	catch (error) {
+		return await respondWithStatus(res, 401, 'Invalid user');
+	}
+}
+
+export async function revokeToken(token) {
+	db.put(token, 'revoked');
+}