refactor server structure
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6
server/src/constants.ts
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6
server/src/constants.ts
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@ -0,0 +1,6 @@
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export namespace Constants {
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export const SERVER_PORT = 8080;
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export const SERVER_TICK_RATE = (1 / 60) * 1000;
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export const GAME_TOPIC = 'game';
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export const MAX_PLAYERS = 8;
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}
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32
server/src/main.ts
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32
server/src/main.ts
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@ -0,0 +1,32 @@
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import { Grid } from '@engine/structures';
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import {
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ServerMessageProcessor,
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ServerSocketMessagePublisher,
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ServerSocketMessageReceiver
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} from './network';
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import { Collision, NetworkUpdate, Physics, WallBounds } from '@engine/systems';
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import { Game } from '@engine/Game';
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import { Constants } from './constants';
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import { GameServer } from './server';
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const messageReceiver = new ServerSocketMessageReceiver();
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const messagePublisher = new ServerSocketMessagePublisher();
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const messageProcessor = new ServerMessageProcessor();
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const game = new Game();
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const server = new GameServer(game, messageReceiver, messagePublisher);
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[
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new Physics(),
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new Collision(new Grid()),
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new WallBounds(),
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new NetworkUpdate(messageReceiver, messagePublisher, messageProcessor)
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].forEach((system) => game.addSystem(system));
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game.start();
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setInterval(() => {
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game.doGameLoop(performance.now());
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}, Constants.SERVER_TICK_RATE);
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server.serve();
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8
server/src/network/MessageProcessor.ts
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8
server/src/network/MessageProcessor.ts
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@ -0,0 +1,8 @@
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import { MessageProcessor } from '@engine/network';
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import { ServerMessage } from '.';
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export class ServerMessageProcessor implements MessageProcessor {
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constructor() {}
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public process(_message: ServerMessage) {}
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}
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31
server/src/network/MessagePublisher.ts
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31
server/src/network/MessagePublisher.ts
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@ -0,0 +1,31 @@
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import { Message, MessagePublisher } from '@engine/network';
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import { Server } from 'bun';
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import { Constants } from '../constants';
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import { stringify } from '@engine/utils';
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export class ServerSocketMessagePublisher implements MessagePublisher {
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private server?: Server;
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private messages: Message[];
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constructor(server?: Server) {
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this.messages = [];
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if (server) this.setServer(server);
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}
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public setServer(server: Server) {
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this.server = server;
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}
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public addMessage(message: Message) {
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this.messages.push(message);
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}
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public publish() {
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if (this.messages.length) {
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this.server?.publish(Constants.GAME_TOPIC, stringify(this.messages));
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this.messages = [];
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}
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}
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}
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22
server/src/network/MessageReceiver.ts
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22
server/src/network/MessageReceiver.ts
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@ -0,0 +1,22 @@
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import { MessageQueueProvider } from '@engine/network';
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import type { ServerMessage } from '.';
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export class ServerSocketMessageReceiver implements MessageQueueProvider {
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private messages: ServerMessage[];
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constructor() {
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this.messages = [];
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}
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public addMessage(message: ServerMessage) {
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this.messages.push(message);
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}
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public getNewMessages() {
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return this.messages;
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}
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public clearMessages() {
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this.messages = [];
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}
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}
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16
server/src/network/index.ts
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16
server/src/network/index.ts
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import { Message } from '@engine/network';
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export * from './MessageProcessor';
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export * from './MessagePublisher';
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export * from './MessageReceiver';
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export type SessionData = { sessionId: string };
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export type Session = {
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sessionId: string;
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controllableEntities: Set<string>;
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};
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export interface ServerMessage extends Message {
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sessionData: SessionData;
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}
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@ -1,110 +1,124 @@
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import { Game } from '@engine/Game';
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import { EntityNames, Player } from '@engine/entities';
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import { WallBounds, Physics, Collision, NetworkUpdate } from '@engine/systems';
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import { MessageType } from '@engine/network';
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import { Constants } from './constants';
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import {
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type MessageQueueProvider,
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type MessagePublisher,
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MessageType,
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type MessageProcessor,
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type Message
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} from '@engine/network';
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import { stringify, parse } from '@engine/utils';
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import { Grid } from '@engine/structures';
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import { Miscellaneous } from '@engine/config';
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import { Server } from 'bun';
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ServerSocketMessageReceiver,
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ServerSocketMessagePublisher,
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SessionData,
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ServerMessage,
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Session
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} from './network';
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import { parse } from '@engine/utils';
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import { Server, ServerWebSocket } from 'bun';
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const SERVER_PORT = 8080;
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const SERVER_TICK_RATE = (1 / 60) * 1000;
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const GAME_TOPIC = 'game';
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const MAX_PLAYERS = 8;
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export class GameServer {
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private sessions: Map<string, Session>;
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type SessionData = { sessionId: string };
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interface ServerMessage extends Message {
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sessionData: SessionData;
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}
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class ServerSocketMessageReceiver implements MessageQueueProvider {
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private messages: ServerMessage[];
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constructor() {
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this.messages = [];
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}
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public addMessage(message: ServerMessage) {
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this.messages.push(message);
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}
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public getNewMessages() {
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return this.messages;
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}
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public clearMessages() {
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this.messages = [];
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}
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}
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class ServerMessageProcessor implements MessageProcessor {
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constructor() {}
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public process(_message: ServerMessage) {}
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}
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class ServerSocketMessagePublisher implements MessagePublisher {
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private server?: Server;
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private messages: Message[];
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private game: Game;
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private messageReceiver: ServerSocketMessageReceiver;
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private messagePublisher: ServerSocketMessagePublisher;
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constructor(server?: Server) {
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if (server) {
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this.server = server;
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constructor(
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game: Game,
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messageReceiver: ServerSocketMessageReceiver,
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messagePublisher: ServerSocketMessagePublisher
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) {
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this.sessions = new Map();
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this.game = game;
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this.messageReceiver = messageReceiver;
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this.messagePublisher = messagePublisher;
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}
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this.messages = [];
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public serve() {
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if (!this.server)
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this.server = Bun.serve<SessionData>({
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port: Constants.SERVER_PORT,
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fetch: (req, srv) => this.fetchHandler(req, srv),
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websocket: {
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open: (ws) => this.openWebsocket(ws),
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message: (ws, msg) => this.websocketMessage(ws, msg),
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close: (ws) => this.closeWebsocket(ws)
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}
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});
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this.messagePublisher.setServer(this.server);
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console.log(`Listening on ${this.server.hostname}:${this.server.port}`);
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}
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public setServer(server: Server) {
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this.server = server;
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}
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private websocketMessage(
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websocket: ServerWebSocket<SessionData>,
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message: string | Uint8Array
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) {
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if (typeof message == 'string') {
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const receivedMessage = parse<ServerMessage>(message);
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receivedMessage.sessionData = websocket.data;
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public addMessage(message: Message) {
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this.messages.push(message);
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}
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public publish() {
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if (this.messages.length) {
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this.server?.publish(GAME_TOPIC, stringify(this.messages));
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this.messages = [];
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this.messageReceiver.addMessage(receivedMessage);
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}
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}
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}
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const game = new Game();
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private closeWebsocket(websocket: ServerWebSocket<SessionData>) {
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const { sessionId } = websocket.data;
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const messageReceiver = new ServerSocketMessageReceiver();
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const messagePublisher = new ServerSocketMessagePublisher();
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const messageProcessor = new ServerMessageProcessor();
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const sessionControllableEntities: Map<string, Set<string>> = new Map();
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const sessionEntities = this.sessions.get(sessionId)!.controllableEntities;
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const sessions = new Set<string>();
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this.sessions.delete(sessionId);
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const server = Bun.serve<SessionData>({
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port: SERVER_PORT,
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fetch: async (req, server): Promise<Response> => {
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if (!sessionEntities) return;
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this.messagePublisher.addMessage({
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type: MessageType.REMOVE_ENTITIES,
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body: Array.from(sessionEntities)
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});
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}
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private openWebsocket(websocket: ServerWebSocket<SessionData>) {
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websocket.subscribe(Constants.GAME_TOPIC);
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const { sessionId } = websocket.data;
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if (this.sessions.has(sessionId)) {
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return;
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}
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this.sessions.set(sessionId, {
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sessionId,
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controllableEntities: new Set()
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});
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const player = new Player(sessionId);
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this.game.addEntity(player);
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this.messagePublisher.addMessage({
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type: MessageType.NEW_ENTITIES,
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body: [
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{
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entityName: EntityNames.Player,
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args: { playerId: sessionId, id: player.id }
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}
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]
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});
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this.sessions.get(sessionId)!.controllableEntities.add(player.id);
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}
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private fetchHandler(
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req: Request,
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server: Server
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): Promise<Response> | Response {
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const url = new URL(req.url);
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const headers = new Headers();
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headers.set('Access-Control-Allow-Origin', '*');
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if (url.pathname == '/assign') {
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if (sessions.size > MAX_PLAYERS)
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if (this.sessions.size > Constants.MAX_PLAYERS)
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return new Response('too many players', { headers, status: 400 });
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const sessionId = crypto.randomUUID();
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headers.set('Set-Cookie', `SessionId=${sessionId};`);
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sessions.add(sessionId);
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return new Response(sessionId, { headers });
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}
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@ -127,7 +141,7 @@ const server = Bun.serve<SessionData>({
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}
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});
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return new Response('upgraded', { headers });
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return new Response('upgraded to ws', { headers });
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}
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if (url.pathname == '/me') {
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@ -135,67 +149,5 @@ const server = Bun.serve<SessionData>({
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}
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return new Response('Not found', { headers, status: 404 });
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},
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websocket: {
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open(ws) {
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const { sessionId } = ws.data;
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if (sessionControllableEntities.has(sessionId)) {
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return;
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}
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const player = new Player(sessionId);
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game.addEntity(player);
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sessionControllableEntities.set(sessionId, new Set([player.id]));
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messagePublisher.addMessage({
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type: MessageType.NEW_ENTITIES,
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body: [
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{
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entityName: EntityNames.Player,
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args: { playerId: sessionId, id: player.id }
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}
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]
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});
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ws.subscribe(GAME_TOPIC);
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},
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message(ws, message) {
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if (typeof message == 'string') {
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const receivedMessage = parse<ServerMessage>(message);
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receivedMessage.sessionData = ws.data;
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messageReceiver.addMessage(receivedMessage);
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}
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},
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close(ws) {
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const { sessionId } = ws.data;
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sessions.delete(sessionId);
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const sessionEntities = sessionControllableEntities.get(sessionId);
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if (!sessionEntities) return;
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messagePublisher.addMessage({
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type: MessageType.REMOVE_ENTITIES,
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body: Array.from(sessionEntities)
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});
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}
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}
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});
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messagePublisher.setServer(server);
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[
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new Physics(),
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new Collision(new Grid()),
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new WallBounds(),
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new NetworkUpdate(messageReceiver, messagePublisher, messageProcessor)
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].forEach((system) => game.addSystem(system));
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game.start();
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setInterval(() => {
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game.doGameLoop(performance.now());
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}, SERVER_TICK_RATE);
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console.log(`Listening on ${server.hostname}:${server.port}`);
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}
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