From 7e2ba65c54facc3a277407180d23dade7add288f Mon Sep 17 00:00:00 2001 From: zwitschi Date: Sat, 2 May 2026 14:30:20 +0200 Subject: [PATCH] initialize server project with basic structure and dependencies Co-authored-by: Copilot --- .gitignore | 24 ++ README.md | 46 ++++ package-lock.json | 625 +++++++++++++++++++++++++++++++++++++++++++++ package.json | 24 ++ src/server.test.ts | 24 ++ src/server.ts | 94 +++++++ tsconfig.json | 14 + 7 files changed, 851 insertions(+) create mode 100644 .gitignore create mode 100644 README.md create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 src/server.test.ts create mode 100644 src/server.ts create mode 100644 tsconfig.json diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..daa8310 --- /dev/null +++ b/.gitignore @@ -0,0 +1,24 @@ +# Server-specific ignores +node_modules/ +dist/ + +# Environment +.env +.env.local +.env.*.local + +# Logs +*.log +npm-debug.log* +yarn-debug.log* +yarn-error.log* + +# IDE +.vscode/ +.idea/ +*.swp +*.swo + +# OS +.DS_Store +Thumbs.db diff --git a/README.md b/README.md new file mode 100644 index 0000000..54b9658 --- /dev/null +++ b/README.md @@ -0,0 +1,46 @@ +# DiscoveryServer + +Lightweight Node.js + WebSocket server for ZAMNY co-op matchmaking. + +**Responsibilities**: + +- Player registry + nicknames (max 16 chars) +- List available players +- Room creation / joining (2-player co-op) +- Relay for initial handshake + +**No game logic** (AD-03). All simulation runs client-side. + +## Quick Start + +```bash +npm install +npm run dev # tsx watch, ws://localhost:3001 +npm test # node:test via tsx +npm run build +npm start +``` + +## WebSocket Protocol + +All messages are JSON objects with `type`. + +### Client → Server + +- `{ "type": "set_nickname", "nickname": "Player1" }` +- `{ "type": "list_players" }` +- `{ "type": "join_room", "target": "p123" }` (TODO) + +### Server → Client + +- `{ "type": "welcome", "id": "p1" }` +- `{ "type": "nickname_ok", "nickname": "Player1" }` +- `{ "type": "player_list", "players": [{ "id": "p2", "nickname": "ZomSlayer" }] }` +- `{ "type": "error", "message": "..." }` + +## Notes + +- Pure functions (`validateNickname`, `createRoomId`) are unit-tested. +- Server only starts when run directly (not during tests). +- Port 3001 (hardcoded for now). +- See root [ARCHITECTURE.md](../ARCHITECTURE.md) for full design. diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 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"dependencies": { + "ws": "^8.20.0" + }, + "devDependencies": { + "@types/ws": "^8.18.1", + "tsx": "^4.21.0", + "typescript": "^6.0.3" + } +} diff --git a/src/server.test.ts b/src/server.test.ts new file mode 100644 index 0000000..a8d5d64 --- /dev/null +++ b/src/server.test.ts @@ -0,0 +1,24 @@ +import { describe, it } from "node:test"; +import assert from "node:assert"; +import { validateNickname, createRoomId } from "./server"; + +describe("DiscoveryServer pure functions", () => { + it("validateNickname accepts 1-16 chars", () => { + assert.strictEqual(validateNickname("Z"), true); + assert.strictEqual(validateNickname("PlayerOne"), true); + assert.strictEqual(validateNickname("1234567890123456"), true); + }); + + it("validateNickname rejects empty or >16", () => { + assert.strictEqual(validateNickname(""), false); + assert.strictEqual(validateNickname("12345678901234567"), false); + assert.strictEqual(validateNickname(null as any), false); + }); + + it("createRoomId returns unique strings", () => { + const a = createRoomId(); + const b = createRoomId(); + assert.notStrictEqual(a, b); + assert.match(a, /^r\d+-\d+$/); + }); +}); diff --git a/src/server.ts b/src/server.ts new file mode 100644 index 0000000..bb51278 --- /dev/null +++ b/src/server.ts @@ -0,0 +1,94 @@ +/** + * DiscoveryServer - lightweight matchmaking + room relay. + * NO GAME LOGIC. Only player registry, nicknames, rooms. + * Per AD-03: server must never contain game simulation. + */ + +import { WebSocketServer, WebSocket } from "ws"; + +export interface Player { + id: string; + nickname: string; + ws: WebSocket; + roomId?: string; +} + +export interface Room { + id: string; + players: string[]; +} + +// Pure testable functions +export function validateNickname(n: string): boolean { + return typeof n === "string" && n.length > 0 && n.length <= 16; +} + +let roomCounter = 0; +export function createRoomId(): string { + return `r${Date.now()}-${roomCounter++}`; +} + +// Only start server when run directly (not when imported by tests) +const isMain = + process.argv[1]?.endsWith("server.ts") || + process.argv[1]?.endsWith("server.js"); + +if (isMain) { + const wss = new WebSocketServer({ port: 3001 }); + const players = new Map(); + const rooms = new Map(); + + let nextPlayerId = 1; + + wss.on("connection", (ws) => { + const playerId = `p${nextPlayerId++}`; + const player: Player = { id: playerId, nickname: "Anon", ws }; + + players.set(playerId, player); + + ws.on("message", (data) => { + try { + const msg = JSON.parse(data.toString()); + + switch (msg.type) { + case "set_nickname": + if (typeof msg.nickname === "string" && msg.nickname.length <= 16) { + player.nickname = msg.nickname; + ws.send( + JSON.stringify({ + type: "nickname_ok", + nickname: player.nickname, + }), + ); + } + break; + + case "list_players": + const list = Array.from(players.values()) + .filter((p) => p.id !== playerId && !p.roomId) + .map((p) => ({ id: p.id, nickname: p.nickname })); + ws.send(JSON.stringify({ type: "player_list", players: list })); + break; + + case "join_room": + // TODO: implement room creation / joining logic + break; + + default: + ws.send(JSON.stringify({ type: "error", message: "unknown_type" })); + } + } catch (e) { + ws.send(JSON.stringify({ type: "error", message: "bad_json" })); + } + }); + + ws.on("close", () => { + players.delete(playerId); + // TODO: clean up rooms if player was in one + }); + + ws.send(JSON.stringify({ type: "welcome", id: playerId })); + }); + + console.log("DiscoveryServer listening on ws://localhost:3001"); +} diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..8314682 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,14 @@ +{ + "compilerOptions": { + "target": "ES2022", + "module": "ESNext", + "moduleResolution": "bundler", + "outDir": "./dist", + "rootDir": "./src", + "strict": true, + "esModuleInterop": true, + "skipLibCheck": true, + "forceConsistentCasingInFileNames": true + }, + "include": ["src"] +}