initialize server project with basic structure and dependencies

Co-authored-by: Copilot <copilot@github.com>
2026-05-02 14:30:20 +02:00
commit 7e2ba65c54
7 changed files with 851 additions and 0 deletions
@@ -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
@@ -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.
@@ -0,0 +1,625 @@
+{
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+      "license": "ISC",
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+      "license": "MIT",
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+      },
+      "bin": {
+        "tsx": "dist/cli.mjs"
+      },
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+        "node": ">=18.0.0"
+      },
+      "optionalDependencies": {
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+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
+    "node_modules/undici-types": {
+      "version": "7.19.2",
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+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/ws": {
+      "version": "8.20.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.20.0.tgz",
+      "integrity": "sha512-sAt8BhgNbzCtgGbt2OxmpuryO63ZoDk/sqaB/znQm94T4fCEsy/yV+7CdC1kJhOU9lboAEU7R3kquuycDoibVA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    }
+  }
+}
@@ -0,0 +1,24 @@
+{
+  "name": "server",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "dev": "tsx watch src/server.ts",
+    "build": "tsc",
+    "start": "node dist/server.js",
+    "test": "tsx --test src/server.test.ts"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "dependencies": {
+    "ws": "^8.20.0"
+  },
+  "devDependencies": {
+    "@types/ws": "^8.18.1",
+    "tsx": "^4.21.0",
+    "typescript": "^6.0.3"
+  }
+}
@@ -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+$/);
+  });
+});
@@ -0,0 +1,94 @@
+/**
+ * DiscoveryServer - lightweight matchmaking + room relay.
+ * NO GAME LOGIC. Only player registry, nicknames, rooms.
+ * Per AD-03: server must never contain game simulation.
+ */
+
+import { WebSocketServer, WebSocket } from "ws";
+
+export interface Player {
+  id: string;
+  nickname: string;
+  ws: WebSocket;
+  roomId?: string;
+}
+
+export interface Room {
+  id: string;
+  players: string[];
+}
+
+// Pure testable functions
+export function validateNickname(n: string): boolean {
+  return typeof n === "string" && n.length > 0 && n.length <= 16;
+}
+
+let roomCounter = 0;
+export function createRoomId(): string {
+  return `r${Date.now()}-${roomCounter++}`;
+}
+
+// Only start server when run directly (not when imported by tests)
+const isMain =
+  process.argv[1]?.endsWith("server.ts") ||
+  process.argv[1]?.endsWith("server.js");
+
+if (isMain) {
+  const wss = new WebSocketServer({ port: 3001 });
+  const players = new Map<string, Player>();
+  const rooms = new Map<string, Room>();
+
+  let nextPlayerId = 1;
+
+  wss.on("connection", (ws) => {
+    const playerId = `p${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");
+}
@@ -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"]
+}