Refactor joinLobby to avoid top-level currentGameRunner variable

src/client/ClientGameRunner.ts

@@ -63,22 +63,12 @@ export interface LobbyConfig {
   gameRecord?: GameRecord;
 }
 
-// Module-level reference to the current game runner
-let currentGameRunner: ClientGameRunner | null = null;
-
-export function shouldPreventUnload(): boolean {
-  if (currentGameRunner) {
-    return currentGameRunner.shouldPreventWindowClose();
-  }
-  return false;
-}
-
 export function joinLobby(
   eventBus: EventBus,
   lobbyConfig: LobbyConfig,
   onPrestart: () => void,
   onJoin: () => void,
-): () => void {
+): () => boolean {
   console.log(
     `joining lobby: gameID: ${lobbyConfig.gameID}, clientID: ${lobbyConfig.clientID}`,
   );
@@ -88,6 +78,8 @@ export function joinLobby(
 
   const transport = new Transport(lobbyConfig, eventBus);
 
+  let currentGameRunner: ClientGameRunner | null = null;
+
   const onconnect = () => {
     console.log(`Joined game lobby ${lobbyConfig.gameID}`);
     transport.joinGame(0);
@@ -141,9 +133,13 @@ export function joinLobby(
   };
   transport.connect(onconnect, onmessage);
   return () => {
+    if (currentGameRunner && currentGameRunner.shouldPreventWindowClose()) {
+      return false;
+    }
     console.log("leaving game");
     currentGameRunner = null;
     transport.leaveGame();
+    return true;
   };
 }
 

src/client/Main.ts

@@ -6,7 +6,7 @@ import { ServerConfig } from "../core/configuration/Config";
 import { getServerConfigFromClient } from "../core/configuration/ConfigLoader";
 import { UserSettings } from "../core/game/UserSettings";
 import "./AccountModal";
-import { joinLobby, shouldPreventUnload } from "./ClientGameRunner";
+import { joinLobby } from "./ClientGameRunner";
 import { fetchCosmetics } from "./Cosmetics";
 import "./DarkModeButton";
 import { DarkModeButton } from "./DarkModeButton";
@@ -80,7 +80,7 @@ export interface JoinLobbyEvent {
 }
 
 class Client {
-  private gameStop: (() => void) | null = null;
+  private gameStop: (() => boolean) | null = null;
   private eventBus: EventBus = new EventBus();
 
   private usernameInput: UsernameInput | null = null;
@@ -154,16 +154,11 @@ class Client {
     this.publicLobby = document.querySelector("public-lobby") as PublicLobby;
 
     window.addEventListener("beforeunload", (e) => {
-      // Check if we should prevent unload (player is alive)
-      if (shouldPreventUnload()) {
+      if (this.gameStop && !this.gameStop()) {
         e.preventDefault();
         return "";
       }
-      // Otherwise, cleanup the game normally
       console.log("Browser is closing");
-      if (this.gameStop !== null) {
-        this.gameStop();
-      }
     });
 
     document.addEventListener("join-lobby", this.handleJoinLobby.bind(this));