cleaner login and registration

src/lib/js/authenticate.ts

@@ -0,0 +1,40 @@
+import type { RequestEvent } from "@sveltejs/kit";
+import { COOKIE_SECRET } from "$env/static/private";
+import { verify } from "jsonwebtoken";
+import { error } from "@sveltejs/kit";
+import { dbConnect, dbDisconnect } from "../../utils/db";
+import { User } from "../../models/User";;
+
+export async function authenticateUser(event: RequestEvent){
+// Set your master secret key (replace with your own secret)
+	const { cookies } = event;
+	const masterSecret = COOKIE_SECRET;
+	const secretKey = masterSecret
+	let decoded
+	try{
+		const cookie : string = cookies.get("UserSession")
+		if(cookie){
+			decoded = await verify(cookie, secretKey);
+		}
+
+	}
+	catch(e){
+		throw error(401, "Cookies have changed, please log in again")
+	}
+
+	if(decoded){
+		await dbConnect()
+		let res = await User.findOne({username: decoded.username}, 'access').lean();
+		await dbDisconnect()
+		if(!res){
+			throw error(404, "User for this Cookie does no longer exist")
+		}
+		return {
+			username: decoded.username,
+			access: res.access
+		}
+	}
+	else{
+		return null
+	}
+}