add run() to Server

docs/api/Server.md

@@ -17,14 +17,18 @@ The `games` argument takes a list of game implementations
 
 ### Returns
 
-(`app`): A Koa app.
+An object that contains:
+
+1. run (_function_): A function to run the server.
+   Signature: (port, callback) => {}
+2. app (_object_): The Koa app.
 
 ### Usage
 
 ```js
 const Server = require('boardgame.io/server');
 
-const app = Server({
+const server = Server({
   games: [game1, game2, ...],
 
   // Optional, if you want to hook it up to a
@@ -35,5 +39,5 @@ const app = Server({
   db: new DbImpl(),
 });
 
-app.listen(8000);
+server.run(8000);
 ```

docs/multiplayer.md

@@ -30,10 +30,10 @@ are playing. Here is a snippet showing how to set it up
 to serve the socket requests coming from the client.
 
 ```js
-const Server = require('boardgame.io/server');
+const Server = require('boardgame.io/server').Server;
 const TicTacToe = require('./tic-tac-toe');
-const app = Server({ games: [TicTacToe] });
-app.listen(8000);
+const server = Server({ games: [TicTacToe] });
+server.run(8000);
 ```
 
 You can also serve multiple types of games from the same server:
@@ -69,17 +69,17 @@ URL be synced to the same game.
 
 In a real app, you might want to also serve your React
 frontend from the same server as well. The returned object
-`app` is a [Koa](http://koajs.com/) app that you can
-use to attach other handlers etc.
+contains `app`, which is a [Koa](http://koajs.com/) app that
+you can use to attach other handlers etc.
 
 ```js
 const KoaStatic = require('koa-static');
 const Server = require('boardgame.io/server');
 const TicTacToe = require('./tic-tac-toe');
 
-const app = Server({ games: [TicTacToe] });
-app.use(KoaStatic('path/to/dir'));
-app.listen(8000);
+const server = Server({ games: [TicTacToe] });
+server.app.use(KoaStatic('path/to/dir'));
+server.run(8000);
 ```
 
 You might also want to keep them separate (one server to serve the web app

examples/server.js

@@ -11,29 +11,29 @@ import KoaStatic from 'koa-static';
 import KoaHelmet from 'koa-helmet';
 import KoaWebpack from 'koa-webpack';
 import WebpackConfig from './webpack.dev.js';
-import Server from 'boardgame.io/server';
+import { Server } from 'boardgame.io/server';
 import TicTacToe from './modules/tic-tac-toe/game';
 import Chess from './modules/chess/game';
 
 const PORT = process.env.PORT || 8000;
 const DEV = process.env.NODE_ENV === 'development';
 const PROD = !DEV;
 
-const app = Server({ games: [TicTacToe, Chess] });
+const server = Server({ games: [TicTacToe, Chess] });
 
 if (DEV) {
-  app.use(
+  server.app.use(
     KoaWebpack({
       config: WebpackConfig,
     })
   );
 }
 
 if (PROD) {
-  app.use(KoaStatic(path.join(__dirname, 'dist')));
-  app.use(KoaHelmet());
+  server.app.use(KoaStatic(path.join(__dirname, 'dist')));
+  server.app.use(KoaHelmet());
 }
 
-app.listen(PORT, () => {
+server.run(PORT, () => {
   console.log(`Serving at: http://localhost:${PORT}/`);
 });

packages/server.js

@@ -6,6 +6,6 @@
  * https://opensource.org/licenses/MIT.
  */
 
-import Server from '../src/server/index.js';
+import { Server } from '../src/server/index.js';
 
-export default Server;
+export { Server };

src/server/index.js

@@ -14,7 +14,7 @@ import { createGameReducer } from '../core/reducer';
 const PING_TIMEOUT = 20 * 1e3;
 const PING_INTERVAL = 10 * 1e3;
 
-function Server({ games, db, _clientInfo, _roomInfo }) {
+export function Server({ games, db, _clientInfo, _roomInfo }) {
   const app = new Koa();
   const io = new IO({
     ioOptions: {
@@ -28,7 +28,6 @@ function Server({ games, db, _clientInfo, _roomInfo }) {
   if (db === undefined) {
     db = new InMemory();
   }
-  db.connect();
 
   const clientInfo = _clientInfo || new Map();
   const roomInfo = _roomInfo || new Map();
@@ -130,7 +129,11 @@ function Server({ games, db, _clientInfo, _roomInfo }) {
     });
   }
 
-  return app;
+  return {
+    app,
+    run: async (port, callback) => {
+      await db.connect();
+      app.listen(port, callback);
+    },
+  };
 }
-
-export default Server;

src/server/index.test.js

@@ -6,7 +6,7 @@
  * https://opensource.org/licenses/MIT.
  */
 
-import Server from './index';
+import { Server } from './index';
 import Game from '../core/game';
 import * as ActionCreators from '../core/action-creators';
 import * as Redux from 'redux';
@@ -61,6 +61,7 @@ const game = Game({ seed: 0 });
 
 test('basic', () => {
   const server = Server({ games: [game] });
+  server.run();
   expect(server).not.toBe(undefined);
 });
 
@@ -77,7 +78,7 @@ test('connect / disconnect', async () => {
   const _roomInfo = new Map();
 
   const server = Server({ games: [game], _clientInfo, _roomInfo });
-  const io = server.context.io;
+  const io = server.app.context.io;
 
   io.socket.id = '0';
   await io.socket.receive('sync', 'gameID', '0', 2);
@@ -115,7 +116,7 @@ test('connect / disconnect', async () => {
 
 test('sync', async () => {
   const server = Server({ games: [game] });
-  const io = server.context.io;
+  const io = server.app.context.io;
   expect(server).not.toBe(undefined);
 
   const spy = jest.spyOn(Redux, 'createStore');
@@ -139,7 +140,7 @@ test('sync', async () => {
 
 test('action', async () => {
   const server = Server({ games: [game] });
-  const io = server.context.io;
+  const io = server.app.context.io;
   const action = ActionCreators.gameEvent('endTurn');
 
   await io.socket.receive('action', action);
@@ -218,7 +219,7 @@ test('playerView (sync)', async () => {
   });
 
   const server = Server({ games: [game] });
-  const io = server.context.io;
+  const io = server.app.context.io;
 
   await io.socket.receive('sync', 'gameID', 0);
   expect(io.socket.emit).toHaveBeenCalledTimes(1);
@@ -232,7 +233,7 @@ test('playerView (action)', async () => {
     },
   });
   const server = Server({ games: [game] });
-  const io = server.context.io;
+  const io = server.app.context.io;
   const action = ActionCreators.gameEvent('endTurn');
 
   io.socket.id = 'first';
@@ -272,7 +273,7 @@ test('custom db implementation', async () => {
 
   const game = Game({});
   const server = Server({ games: [game], db: new Custom() });
-  const io = server.context.io;
+  const io = server.app.context.io;
 
   await io.socket.receive('sync', 'gameID');
   expect(getId).toBe('gameID');