Update buzzer app to serve static files and handle WebSocket connections

Integrates static file serving for HTML, CSS, and JS, and sets up a WebSocket server for real-time communication.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: f3ac8eb3-f610-4678-ab6e-ebf900098be4
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 182c9671-a459-4b94-a7eb-1c7a0cefe768
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/d4b7863b-f7b2-425c-a9b5-ad7bd1885e9d/f3ac8eb3-f610-4678-ab6e-ebf900098be4/N1qS6qo
Replit-Helium-Checkpoint-Created: true

server/buzzer-rooms.ts

@@ -0,0 +1,99 @@
+import type { WebSocket } from "ws";
+
+export interface RoomSettings {
+  mode: "individual" | "teams";
+  numTeams: number;
+  teamNames: string[];
+  playerPickTeam: boolean;
+  showBuzzOrder: boolean;
+  buzzerLockout: boolean;
+  timerSeconds: number;
+}
+
+export interface Player {
+  id: string;
+  name: string;
+  teamIndex: number | null;
+  ws: WebSocket | null;
+  isConnected: boolean;
+}
+
+export interface BuzzerState {
+  roundOpen: boolean;
+  buzzOrder: string[];
+  buzzTimes: Map<string, number>;
+}
+
+export interface Room {
+  id: string;
+  moderatorSecret: string;
+  modWs: WebSocket | null;
+  settings: RoomSettings;
+  players: Map<string, Player>;
+  buzzerState: BuzzerState;
+  locked: boolean;
+  teamLocked: boolean;
+}
+
+export const rooms = new Map<string, Room>();
+export const wsToPlayer = new Map<WebSocket, { roomId: string; playerId: string }>();
+
+const GREEK = ["Alpha","Beta","Gamma","Delta","Epsilon","Zeta","Eta","Theta","Iota","Kappa","Lambda","Mu","Nu","Xi","Omicron","Pi","Rho","Sigma","Tau","Upsilon","Phi","Chi","Psi","Omega"];
+export function greekName(i: number): string {
+  const cycle = Math.floor(i / GREEK.length);
+  const name = GREEK[i % GREEK.length];
+  return cycle === 0 ? name : `${name} ${toRoman(cycle + 1)}`;
+}
+function toRoman(n: number): string {
+  const vals = [1000,900,500,400,100,90,50,40,10,9,5,4,1];
+  const syms = ["M","CM","D","CD","C","XC","L","XL","X","IX","V","IV","I"];
+  let out = "";
+  for (let i = 0; i < vals.length; i++) while (n >= vals[i]) { out += syms[i]; n -= vals[i]; }
+  return out;
+}
+
+export function genId(len = 8): string {
+  const c = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789";
+  let s = "";
+  for (let i = 0; i < len; i++) s += c[Math.floor(Math.random() * c.length)];
+  return s;
+}
+
+export function sanitize(v: unknown, max = 32): string {
+  return String(v ?? "").trim().replace(/[<>"'`]/g, "").slice(0, max);
+}
+
+export function freshBuzzer(): BuzzerState {
+  return { roundOpen: false, buzzOrder: [], buzzTimes: new Map() };
+}
+
+export function publicRoom(room: Room) {
+  return {
+    id: room.id,
+    settings: room.settings,
+    locked: room.locked,
+    teamLocked: room.teamLocked,
+    modOnline: room.modWs !== null,
+    buzzerState: {
+      roundOpen: room.buzzerState.roundOpen,
+      buzzOrder: room.buzzerState.buzzOrder,
+    },
+    players: Array.from(room.players.values()).map(p => ({
+      id: p.id,
+      name: p.name,
+      teamIndex: p.teamIndex,
+      isConnected: p.isConnected,
+    })),
+  };
+}
+
+export function broadcast(room: Room, msg: object, exclude?: WebSocket) {
+  const d = JSON.stringify(msg);
+  for (const p of room.players.values())
+    if (p.ws && p.isConnected && p.ws !== exclude) try { p.ws.send(d); } catch {}
+  if (room.modWs && room.modWs !== exclude) try { room.modWs.send(d); } catch {}
+}
+
+export function toMod(room: Room, msg: object) {
+  if (room.modWs) try { room.modWs.send(JSON.stringify(msg)); } catch {}
+}