feat: multiplayer slice — end to end working

WebSocket server:
- WS auth via Better Auth session on upgrade request
- Router with discriminated union dispatch and two-layer error handling
- In-memory connections map with broadcastToLobby
- Lobby handlers: join, leave, start
- Game handlers: answer, resolve round, end game, game:ready for state sync
- Shared game state store (LobbyGameStore interface + InMemory impl)
- Timer map separate from store for Valkey-readiness

REST API:
- POST /api/v1/lobbies — create lobby + add host as first player
- POST /api/v1/lobbies/:code/join — atomic join with capacity/status checks
- getLobbyWithPlayers added to model for id-based lookup

Frontend:
- WsClient class with typed on/off, connect/disconnect, isConnected
- WsProvider owns connection lifecycle (connect/disconnect/isConnected state)
- WsConnector component triggers connection at multiplayer layout mount
- Lobby waiting room: live player list, copyable code, host Start button
- Game view: reuses QuestionCard, game:ready on mount, round results
- MultiplayerScoreScreen: sorted scores, winner highlight, tie handling
- Vite proxy: /ws and /api proxied to localhost:3000 for dev cookie fix

Tests:
- lobbyService.test.ts: create, join, retry, idempotency, full lobby
- auth.test.ts: 401 reject, upgrade success, 500 on error
- router.test.ts: dispatch all message types, error handling
- vitest.config.ts: exclude dist folder

Fixes:
- server.ts: server.listen() instead of app.listen() for WS support
- StrictMode removed from main.tsx (incompatible with WS lifecycle)
- getLobbyWithPlayers(id) added for handleLobbyStart lookup
This commit is contained in:
lila 2026-04-18 23:32:21 +02:00
parent 540155788a
commit 8aaafea3fc
13 changed files with 545 additions and 78 deletions

View file

@ -7,7 +7,46 @@ type ErrorResponse = { success: false; error: string };
type GameStartResponse = SuccessResponse<GameSession>;
type GameAnswerResponse = SuccessResponse<AnswerResult>;
vi.mock("@lila/db", () => ({ getGameTerms: vi.fn(), getDistractors: vi.fn() }));
vi.mock("@lila/db", async (importOriginal) => {
const actual = await importOriginal<typeof import("@lila/db")>();
return { ...actual, getGameTerms: vi.fn(), getDistractors: vi.fn() };
});
vi.mock("../lib/auth.js", () => ({
auth: {
api: {
getSession: vi
.fn()
.mockResolvedValue({
session: {
id: "session-1",
userId: "user-1",
token: "fake-token",
expiresAt: new Date(Date.now() + 1000 * 60 * 60),
createdAt: new Date(),
updatedAt: new Date(),
ipAddress: null,
userAgent: null,
},
user: {
id: "user-1",
name: "Test User",
email: "test@test.com",
emailVerified: false,
image: null,
createdAt: new Date(),
updatedAt: new Date(),
},
}),
},
handler: vi.fn(),
},
}));
vi.mock("better-auth/node", () => ({
fromNodeHeaders: vi.fn().mockReturnValue({}),
toNodeHandler: vi.fn().mockReturnValue(vi.fn()),
}));
import { getGameTerms, getDistractors } from "@lila/db";
import { createApp } from "../app.js";

View file

@ -0,0 +1,176 @@
import { describe, it, expect, vi, beforeEach } from "vitest";
vi.mock("@lila/db", () => ({
createLobby: vi.fn(),
getLobbyByCodeWithPlayers: vi.fn(),
addPlayer: vi.fn(),
}));
import {
createLobby as createLobbyModel,
getLobbyByCodeWithPlayers,
addPlayer,
} from "@lila/db";
import { createLobby, joinLobby } from "./lobbyService.js";
const mockCreateLobby = vi.mocked(createLobbyModel);
const mockGetLobbyByCodeWithPlayers = vi.mocked(getLobbyByCodeWithPlayers);
const mockAddPlayer = vi.mocked(addPlayer);
const fakeLobby = {
id: "00000000-0000-4000-8000-000000000001",
code: "ABC123",
hostUserId: "user-1",
status: "waiting" as const,
createdAt: new Date(),
};
const fakeLobbyWithPlayers = {
...fakeLobby,
players: [
{
lobbyId: fakeLobby.id,
userId: "user-1",
score: 0,
joinedAt: new Date(),
user: { id: "user-1", name: "Alice" },
},
],
};
beforeEach(() => {
vi.clearAllMocks();
mockCreateLobby.mockResolvedValue(fakeLobby);
mockAddPlayer.mockResolvedValue({
lobbyId: fakeLobby.id,
userId: "user-1",
score: 0,
joinedAt: new Date(),
});
mockGetLobbyByCodeWithPlayers.mockResolvedValue(fakeLobbyWithPlayers);
});
describe("createLobby", () => {
it("creates a lobby and adds the host as the first player", async () => {
const result = await createLobby("user-1");
expect(mockCreateLobby).toHaveBeenCalledOnce();
expect(mockAddPlayer).toHaveBeenCalledWith(
fakeLobby.id,
"user-1",
expect.any(Number),
);
expect(result.id).toBe(fakeLobby.id);
});
it("retries on unique code collision", async () => {
const uniqueViolation = Object.assign(new Error("unique"), {
code: "23505",
});
mockCreateLobby
.mockRejectedValueOnce(uniqueViolation)
.mockResolvedValueOnce(fakeLobby);
const result = await createLobby("user-1");
expect(mockCreateLobby).toHaveBeenCalledTimes(2);
expect(result.id).toBe(fakeLobby.id);
});
it("throws after max retry attempts", async () => {
const uniqueViolation = Object.assign(new Error("unique"), {
code: "23505",
});
mockCreateLobby.mockRejectedValue(uniqueViolation);
await expect(createLobby("user-1")).rejects.toThrow(
"Could not generate a unique lobby code",
);
});
});
describe("joinLobby", () => {
it("returns lobby with players when join succeeds", async () => {
const fullLobby = {
...fakeLobbyWithPlayers,
players: [
...fakeLobbyWithPlayers.players,
{
lobbyId: fakeLobby.id,
userId: "user-2",
score: 0,
joinedAt: new Date(),
user: { id: "user-2", name: "Bob" },
},
],
};
mockGetLobbyByCodeWithPlayers
.mockResolvedValueOnce(fakeLobbyWithPlayers)
.mockResolvedValueOnce(fullLobby);
const result = await joinLobby("ABC123", "user-2");
expect(mockAddPlayer).toHaveBeenCalledWith(
fakeLobby.id,
"user-2",
expect.any(Number),
);
expect(result.players).toHaveLength(2);
});
it("throws NotFoundError when lobby does not exist", async () => {
mockGetLobbyByCodeWithPlayers.mockResolvedValue(undefined);
await expect(joinLobby("XXXXXX", "user-2")).rejects.toThrow(
"Lobby not found",
);
});
it("throws ConflictError when lobby is not waiting", async () => {
mockGetLobbyByCodeWithPlayers.mockResolvedValue({
...fakeLobbyWithPlayers,
status: "in_progress" as const,
});
await expect(joinLobby("ABC123", "user-2")).rejects.toThrow(
"Game has already started",
);
});
it("returns lobby idempotently when user already joined", async () => {
mockGetLobbyByCodeWithPlayers.mockResolvedValue({
...fakeLobbyWithPlayers,
players: [
{
lobbyId: fakeLobby.id,
userId: "user-1",
score: 0,
joinedAt: new Date(),
user: { id: "user-1", name: "Alice" },
},
],
});
const result = await joinLobby("ABC123", "user-1");
expect(mockAddPlayer).not.toHaveBeenCalled();
expect(result.players).toHaveLength(1);
});
it("throws ConflictError when lobby is full", async () => {
mockGetLobbyByCodeWithPlayers.mockResolvedValue({
...fakeLobbyWithPlayers,
players: Array.from({ length: 4 }, (_, i) => ({
lobbyId: fakeLobby.id,
userId: `user-${i}`,
score: 0,
joinedAt: new Date(),
user: { id: `user-${i}`, name: `Player ${i}` },
})),
});
await expect(joinLobby("ABC123", "user-5")).rejects.toThrow(
"Lobby is full",
);
});
});

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@ -0,0 +1,106 @@
import { describe, it, expect, vi, beforeEach } from "vitest";
import { IncomingMessage } from "http";
import { Duplex } from "stream";
vi.mock("better-auth/node", () => ({
fromNodeHeaders: vi.fn().mockReturnValue({}),
toNodeHandler: vi.fn().mockReturnValue(vi.fn()),
}));
vi.mock("../lib/auth.js", () => ({
auth: { api: { getSession: vi.fn() }, handler: vi.fn() },
}));
import { auth } from "../lib/auth.js";
import { handleUpgrade } from "./auth.js";
const mockGetSession = vi.mocked(auth.api.getSession);
const fakeSession = {
session: {
id: "session-1",
userId: "user-1",
token: "fake-token",
expiresAt: new Date(Date.now() + 1000 * 60 * 60),
createdAt: new Date(),
updatedAt: new Date(),
ipAddress: null,
userAgent: null,
},
user: {
id: "user-1",
name: "Test User",
email: "test@test.com",
emailVerified: false,
image: null,
createdAt: new Date(),
updatedAt: new Date(),
},
};
const makeMockSocket = () => {
const socket = new Duplex();
socket._read = () => {};
socket._write = (_chunk, _encoding, callback) => callback();
const writeSpy = vi.spyOn(socket, "write").mockImplementation(() => true);
const destroySpy = vi
.spyOn(socket, "destroy")
.mockImplementation(() => socket);
return { socket, writeSpy, destroySpy };
};
const makeMockRequest = () => {
const req = new IncomingMessage(null as never);
req.headers = {};
return req;
};
const makeMockWss = () => ({
handleUpgrade: vi.fn((_req, _socket, _head, cb: (ws: unknown) => void) => {
cb({ send: vi.fn(), on: vi.fn() });
}),
emit: vi.fn(),
});
beforeEach(() => {
vi.clearAllMocks();
});
describe("handleUpgrade", () => {
it("rejects with 401 when no session exists", async () => {
mockGetSession.mockResolvedValue(null);
const { socket, writeSpy, destroySpy } = makeMockSocket();
const req = makeMockRequest();
const wss = makeMockWss();
await handleUpgrade(req, socket, Buffer.alloc(0), wss as never);
expect(writeSpy).toHaveBeenCalledWith(expect.stringContaining("401"));
expect(destroySpy).toHaveBeenCalled();
expect(wss.handleUpgrade).not.toHaveBeenCalled();
});
it("upgrades connection when session exists", async () => {
mockGetSession.mockResolvedValue(fakeSession);
const { socket, destroySpy } = makeMockSocket();
const req = makeMockRequest();
const wss = makeMockWss();
await handleUpgrade(req, socket, Buffer.alloc(0), wss as never);
expect(wss.handleUpgrade).toHaveBeenCalled();
expect(wss.emit).toHaveBeenCalledWith(
"connection",
expect.anything(),
req,
fakeSession,
);
expect(destroySpy).not.toHaveBeenCalled();
});
it("rejects with 500 when getSession throws", async () => {
mockGetSession.mockRejectedValue(new Error("DB error"));
const { socket, writeSpy, destroySpy } = makeMockSocket();
const req = makeMockRequest();
const wss = makeMockWss();
await handleUpgrade(req, socket, Buffer.alloc(0), wss as never);
expect(writeSpy).toHaveBeenCalledWith(expect.stringContaining("500"));
expect(destroySpy).toHaveBeenCalled();
});
});

View file

@ -6,6 +6,7 @@ import {
deleteLobby,
removePlayer,
updateLobbyStatus,
getLobbyByIdWithPlayers,
} from "@lila/db";
import {
addConnection,
@ -87,7 +88,7 @@ export const handleLobbyStart = async (
user: User,
): Promise<void> => {
// Load lobby and validate
const lobby = await getLobbyByCodeWithPlayers(msg.lobbyId);
const lobby = await getLobbyByIdWithPlayers(msg.lobbyId);
if (!lobby) {
throw new NotFoundError("Lobby not found");
}

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@ -0,0 +1,125 @@
import { describe, it, expect, vi, beforeEach } from "vitest";
vi.mock("./handlers/lobbyHandlers.js", () => ({
handleLobbyJoin: vi.fn(),
handleLobbyLeave: vi.fn(),
handleLobbyStart: vi.fn(),
}));
vi.mock("./handlers/gameHandlers.js", () => ({
handleGameAnswer: vi.fn(),
handleGameReady: vi.fn(),
}));
import { handleMessage } from "./router.js";
import {
handleLobbyJoin,
handleLobbyLeave,
handleLobbyStart,
} from "./handlers/lobbyHandlers.js";
import { handleGameAnswer, handleGameReady } from "./handlers/gameHandlers.js";
const mockHandleLobbyJoin = vi.mocked(handleLobbyJoin);
const mockHandleLobbyLeave = vi.mocked(handleLobbyLeave);
const mockHandleLobbyStart = vi.mocked(handleLobbyStart);
const mockHandleGameAnswer = vi.mocked(handleGameAnswer);
const mockHandleGameReady = vi.mocked(handleGameReady);
const fakeWs = { send: vi.fn(), readyState: 1, OPEN: 1 };
const FAKE_LOBBY_ID = "00000000-0000-4000-8000-000000000001";
const FAKE_QUESTION_ID = "00000000-0000-4000-8000-000000000002";
const fakeAuth = {
session: {
id: "session-1",
userId: "user-1",
token: "fake-token",
expiresAt: new Date(Date.now() + 1000 * 60 * 60),
createdAt: new Date(),
updatedAt: new Date(),
ipAddress: null,
userAgent: null,
},
user: {
id: "user-1",
name: "Test User",
email: "test@test.com",
emailVerified: false,
image: null,
createdAt: new Date(),
updatedAt: new Date(),
},
};
beforeEach(() => {
vi.clearAllMocks();
});
describe("handleMessage", () => {
it("dispatches lobby:join to handleLobbyJoin", async () => {
const msg = JSON.stringify({ type: "lobby:join", code: "ABC123" });
await handleMessage(fakeWs as never, msg, fakeAuth);
expect(mockHandleLobbyJoin).toHaveBeenCalledWith(
fakeWs,
{ type: "lobby:join", code: "ABC123" },
fakeAuth.user,
);
});
it("dispatches lobby:leave to handleLobbyLeave", async () => {
const msg = JSON.stringify({ type: "lobby:leave", lobbyId: FAKE_LOBBY_ID });
await handleMessage(fakeWs as never, msg, fakeAuth);
expect(mockHandleLobbyLeave).toHaveBeenCalled();
});
it("dispatches lobby:start to handleLobbyStart", async () => {
const msg = JSON.stringify({ type: "lobby:start", lobbyId: FAKE_LOBBY_ID });
await handleMessage(fakeWs as never, msg, fakeAuth);
expect(mockHandleLobbyStart).toHaveBeenCalled();
});
it("dispatches game:answer to handleGameAnswer", async () => {
const msg = JSON.stringify({
type: "game:answer",
lobbyId: FAKE_LOBBY_ID,
questionId: FAKE_QUESTION_ID,
selectedOptionId: 2,
});
await handleMessage(fakeWs as never, msg, fakeAuth);
expect(mockHandleGameAnswer).toHaveBeenCalled();
});
it("dispatches game:ready to handleGameReady", async () => {
const msg = JSON.stringify({ type: "game:ready", lobbyId: FAKE_LOBBY_ID });
await handleMessage(fakeWs as never, msg, fakeAuth);
expect(mockHandleGameReady).toHaveBeenCalled();
});
it("sends error message for invalid JSON", async () => {
await handleMessage(fakeWs as never, "not json", fakeAuth);
expect(fakeWs.send).toHaveBeenCalledWith(
expect.stringContaining("Invalid JSON"),
);
});
it("sends error message for unknown message type", async () => {
const msg = JSON.stringify({ type: "unknown:type" });
await handleMessage(fakeWs as never, msg, fakeAuth);
expect(fakeWs.send).toHaveBeenCalledWith(
expect.stringContaining("Invalid message format"),
);
});
it("sends error message when handler throws AppError", async () => {
const { AppError } = await import("../errors/AppError.js");
mockHandleLobbyJoin.mockRejectedValueOnce(
new AppError("Lobby not found", 404),
);
const msg = JSON.stringify({ type: "lobby:join", code: "ABC123" });
await handleMessage(fakeWs as never, msg, fakeAuth);
expect(fakeWs.send).toHaveBeenCalledWith(
expect.stringContaining("Lobby not found"),
);
});
});

View file

@ -1,3 +1,9 @@
import { defineConfig } from "vitest/config";
export default defineConfig({ test: { environment: "node", globals: true } });
export default defineConfig({
test: {
environment: "node",
globals: true,
exclude: ["**/dist/**", "**/node_modules/**"],
},
});