it is done.

client/Terminal-00-Multiuser.user.js

@@ -35,7 +35,9 @@ if (!window.TE_ACTIVE) {
 (function() {
 	'use strict';
 
-	const USERSCRIPT_VERSION = "20240426.1";
+	// Make sure to change the userscript version too!!!!!!!!!!
+	const USERSCRIPT_VERSION_RAW = "20240425.1";
+	const USERSCRIPT_VERSION = parseInt(USERSCRIPT_VERSION_RAW.replace(".", ""));
 
 	if (!continueRunningScript) {
 		return;
@@ -256,14 +258,16 @@ kbd {
 		}
 	}, 1000);
 
-	/*fetch(`https://git.eusv.net/tgpholly/t00-multiuser/raw/branch/master/client/Terminal-00-Multiuser.user.js?${Date.now()}`).then(res => {
-		res.text(text => {
-			if (text.includes("@version")) {
-				const version = file.split("@version")[1].split("\n")[0].trim().split(".").join("");
-				if ()
+	fetch(`http://localhost:39194/api/version`, { method: "post" }).then(response => {
+		console.log("hi");
+		response.text().then(versionNumberRaw => {
+			const versionNumber = parseInt(versionNumberRaw);
+			if (versionNumber > USERSCRIPT_VERSION) {
+				// We're out of date >:(
+				createUpdateDialog(`${versionNumberRaw.slice(0, versionNumberRaw.length - 1)}.${versionNumberRaw.slice(-1)}`);
 			}
 		});
-	});*/
+	});
 	
 	const keepAlivePacket = createWriter(Endian.LE, 1).writeByte(MessageType.KeepAlive).toBuffer();
 
@@ -602,6 +606,37 @@ kbd {
 		document.body.appendChild(bg);
 	}
 
+	function createUpdateDialog(versionNumber) {
+		const bg = document.createElement("div");
+		windowContainer = bg;
+		bg.style = "z-index:1000000000;position:fixed;top:0px;left:0px;width:100%;height:100%;background-color:rgba(0,0,0,0.5)";
+		const dialog = document.createElement("div");
+		dialog.style = "position:absolute;top:50%;left:50%;min-width:15rem;background-color:#343434;padding:1rem;transform:translate(-50%,-50%);text-align:center;color:white";
+		bg.appendChild(dialog);
+		const title = document.createElement("h4");
+		title.innerText = "An update is available!";
+		title.style.marginBottom = "0px";
+		dialog.appendChild(title);
+
+		const updateText = document.createElement("p");
+		updateText.innerHTML = `<a class="mplink" href="https://git.eusv.net/tgpholly/t00-multiuser/raw/branch/master/client/Terminal-00-Multiuser.user.js?${Date.now()}">Please click here to update to the latest version.</a><br>This takes less than a few seconds to do and ensures you can continue to use MultiProbe.<br><br>Current Version: ${USERSCRIPT_VERSION_RAW}<br>New Version: ${versionNumber}`;
+		dialog.appendChild(updateText);
+
+		const buttons = document.createElement("div");
+		buttons.style.marginTop = "1rem";
+
+		const gotIt = document.createElement("button");
+		gotIt.onclick = () => {
+			bg.remove();
+		}
+		gotIt.innerText = "Later";
+		buttons.appendChild(gotIt);
+
+		dialog.appendChild(buttons);
+
+		document.body.appendChild(bg);
+	}
+
 	function createFirstTimeDialog() {
 		if (localStorage["mpshowfirsttime"] && localStorage["mpshowfirsttime"] === "false") {
 			return;

server/config.example.json

@@ -8,6 +8,7 @@
 		"length": 64,
 		"secret": "changeme"
 	},
+	"githost": "localhost:3000",
 	"database": {
 		"address": "localhost",
 		"port": 3306,

server/index.ts

@@ -274,6 +274,8 @@ fastify.post("/party/join", async (req, res) => {
 // API
 
 fastify.post("/api/login", async (req, res) => {
+	res.header("access-control-allow-origin", "*");
+
 	const data = req.body as UsernameData;
 	if (typeof(data.username) !== "string" || typeof(data.password) !== "string" || data.username.length > 32 || data.password.length < 8) {
 		return res.status(401).send("Username or Password incorrect");
@@ -291,6 +293,30 @@ fastify.post("/api/login", async (req, res) => {
 	return res.status(401).send("Username or Password incorrect");
 });
 
+let cachedVersion = "";
+let cacheExpiry = 0;
+fastify.post("/api/version", async (req, res) => {
+	res.header("access-control-allow-origin", "*");
+
+	if (Date.now() < cacheExpiry) {
+		res.send(cachedVersion);
+	} else {
+		const response = await fetch(`http://${Config.githost}/tgpholly/t00-multiuser/raw/branch/master/client/Terminal-00-Multiuser.user.js?${Date.now()}`);
+		if (response.status === 200) {
+			const content = await response.text();
+			if (content.includes("@version")) {
+				cachedVersion = content.split("@version")[1].split("\n")[0].trim().split(".").join("");
+				cacheExpiry = Date.now() + 30000;
+				return res.send(cachedVersion);
+			} else {
+				return res.send("0");
+			}
+		} else {
+			return res.send("0");
+		}
+	}
+});
+
 // Websocket stuff
 
 const websocketServer = new WebSocketServer({
@@ -446,9 +472,9 @@ websocketServer.on("connection", (socket) => {
 						return;
 					}
 
-					if ((performance.now() - user.lastPingReset) >= 1000) {
+					if ((Date.now() - user.lastPingReset) >= 1000) {
 						user.allowedPings = 10;
-						user.lastPingReset = performance.now();
+						user.lastPingReset = Date.now();
 					}
 
 					if (user.allowedPings > 0) {

server/objects/Config.ts

@@ -7,6 +7,7 @@ export default class Config {
 
 	public static ports:ConfigPorts = config.ports;
 	public static session:ConfigSession = config.session;
+	public static githost:string = config.githost;
 	public static database:ConfigDatabase = config.database;
 }