generate uuids for entities; scaffolding for a server

client/src/JumpStorm.ts

@@ -7,15 +7,63 @@ import {
   Physics,
   Input,
   Collision,
+  MessageQueueProvider,
+  MessagePublisher,
+  NetworkUpdate,
 } from "@engine/systems";
 
+class ClientSocketMessageQueueProvider implements MessageQueueProvider {
+  private socket: WebSocket;
+  private messages: any[];
+
+  constructor(socket: WebSocket) {
+    this.socket = socket;
+    this.messages = [];
+
+    this.socket.addEventListener("message", (e) => {
+      console.log(e);
+    });
+  }
+
+  getNewMessages() {
+    return this.messages;
+  }
+
+  clearMessages() {
+    this.messages = [];
+  }
+}
+
+class ClientSocketMessagePublisher implements MessagePublisher {
+  private socket: WebSocket;
+  private messages: any[];
+
+  constructor(socket: WebSocket) {
+    this.socket = socket;
+    this.messages = [];
+
+    this.socket.addEventListener("message", (e) => {
+      console.log(e);
+    });
+  }
+
+  addMessage(_message: any) {}
+
+  publish() {}
+}
+
 export class JumpStorm {
   private game: Game;
-  private socket: WebSocket;
 
   constructor(ctx: CanvasRenderingContext2D) {
     this.game = new Game();
-    this.socket = new WebSocket("ws://localhost:8080");
+
+    const socket = new WebSocket("ws://localhost:8080");
+    const clientSocketMessageQueueProvider =
+      new ClientSocketMessageQueueProvider(socket);
+    const clientSocketMessagePublisher = new ClientSocketMessagePublisher(
+      socket,
+    );
 
     [
       this.createInputSystem(),
@@ -23,6 +71,10 @@ export class JumpStorm {
       new Physics(),
       new Collision(),
       new WallBounds(ctx.canvas.width),
+      new NetworkUpdate(
+        clientSocketMessageQueueProvider,
+        clientSocketMessagePublisher,
+      ),
       new Render(ctx),
     ].forEach((system) => this.game.addSystem(system));
 
@@ -49,6 +101,7 @@ export class JumpStorm {
         inputSystem.keyPressed(e.key);
       }
     });
+
     window.addEventListener("keyup", (e) => inputSystem.keyReleased(e.key));
 
     return inputSystem;

engine/Game.ts

@@ -7,9 +7,9 @@ export class Game {
   private running: boolean;
   private lastTimeStamp: number;
 
-  public entities: Map<number, Entity>;
+  public entities: Map<string, Entity>;
   public systems: Map<string, System>;
-  public componentEntities: Map<string, Set<number>>;
+  public componentEntities: Map<string, Set<string>>;
 
   constructor() {
     this.lastTimeStamp = performance.now();
@@ -29,11 +29,11 @@ export class Game {
     this.entities.set(entity.id, entity);
   }
 
-  public getEntity(id: number): Entity | undefined {
+  public getEntity(id: string): Entity | undefined {
     return this.entities.get(id);
   }
 
-  public removeEntity(id: number) {
+  public removeEntity(id: string) {
     this.entities.delete(id);
   }
 
@@ -75,7 +75,7 @@ export class Game {
         if (!this.componentEntities.has(component.name)) {
           this.componentEntities.set(
             component.name,
-            new Set<number>([entity.id]),
+            new Set<string>([entity.id]),
           );
           return;
         }

engine/components/NetworkUpdateable.ts

@@ -1,7 +1,13 @@
 import { Component, ComponentNames } from ".";
 
 export class NetworkUpdateable extends Component {
-  constructor() {
+  public isPublish: boolean;
+  public isSubscribe: boolean;
+
+  constructor(isPublish: boolean, isSubscribe: boolean) {
     super(ComponentNames.NetworkUpdateable);
+
+    this.isPublish = isPublish;
+    this.isSubscribe = isSubscribe;
   }
 }

engine/entities/Entity.ts

@@ -1,13 +1,11 @@
 import type { Component } from "../components";
 
 export abstract class Entity {
-  private static ID = 0;
-
-  public readonly id: number;
+  public readonly id: string;
   public readonly components: Map<string, Component>;
 
   constructor() {
-    this.id = Entity.ID++;
+    this.id = crypto.randomUUID();
     this.components = new Map();
   }
 

engine/structures/QuadTree.ts

@@ -1,7 +1,7 @@
 import type { Coord2D, Dimension2D } from "../interfaces";
 
 interface BoxedEntry {
-  id: number;
+  id: string;
   dimension: Dimension2D;
   center: Coord2D;
 }
@@ -72,8 +72,8 @@ export class QuadTree {
     }
   }
 
-  public getNeighborIds(boxedEntry: BoxedEntry): number[] {
-    const neighbors: number[] = this.objects.map(({ id }) => id);
+  public getNeighborIds(boxedEntry: BoxedEntry): string[] {
+    const neighbors: string[] = this.objects.map(({ id }) => id);
 
     if (this.hasChildren()) {
       this.getQuadrants(boxedEntry).forEach((quadrant) => {
@@ -160,11 +160,7 @@ export class QuadTree {
     this.objects.forEach((boxedEntry) => {
       this.getQuadrants(boxedEntry).forEach((direction) => {
         const quadrant = this.children.get(direction);
-        quadrant?.insert(
-          boxedEntry.id,
-          boxedEntry.dimension,
-          boxedEntry.center,
-        );
+        quadrant?.insert(boxedEntry);
       });
     });
 

engine/systems/NetworkUpdate.ts

@@ -1,10 +1,42 @@
 import { System, SystemNames } from ".";
 import { Game } from "../Game";
+import { ComponentNames, NetworkUpdateable } from "../components";
+
+export interface MessageQueueProvider {
+  getNewMessages(): any[];
+  clearMessages(): void;
+}
+
+export interface MessagePublisher {
+  addMessage(message: any): void;
+  publish(): void;
+}
 
 export class NetworkUpdate extends System {
-  constructor() {
+  private queueProvider: MessageQueueProvider;
+  private publisher: MessagePublisher;
+
+  constructor(
+    queueProvider: MessageQueueProvider,
+    publisher: MessagePublisher,
+  ) {
     super(SystemNames.NetworkUpdate);
+
+    this.queueProvider = queueProvider;
+    this.publisher = publisher;
   }
 
-  public update(_dt: number, _game: Game) {}
+  public update(_dt: number, game: Game) {
+    const messages = this.queueProvider.getNewMessages();
+    this.queueProvider.clearMessages();
+
+    game.forEachEntityWithComponent(
+      ComponentNames.NetworkUpdateable,
+      (entity) => {
+        const networkUpdateComponent = entity.getComponent<NetworkUpdateable>(
+          ComponentNames.NetworkUpdateable,
+        );
+      },
+    );
+  }
 }

server/src/server.ts

@@ -1,37 +1,60 @@
 import { Game } from "../../engine/Game";
 import { Floor, Player } from "../../engine/entities";
-import { WallBounds, Physics, Collision } from "../../engine/systems";
+import {
+  WallBounds,
+  Physics,
+  Collision,
+  MessageQueueProvider,
+  MessagePublisher,
+} from "../../engine/systems";
 import { Miscellaneous } from "../../engine/config";
 
 const TICK_RATE = 60 / 1000;
 
-const game = new Game();
+class Server {
+  private server: any;
+  private game: Game;
 
-[
-  new Physics(),
-  new Collision({ width: Miscellaneous.WIDTH, height: Miscellaneous.HEIGHT }),
-  new WallBounds(Miscellaneous.WIDTH),
-].forEach((system) => game.addSystem(system));
+  constructor() {
+    this.game = new Game();
 
-[new Floor(160), new Player()].forEach((entity) => game.addEntity(entity));
+    [
+      new Physics(),
+      new Collision({
+        width: Miscellaneous.WIDTH,
+        height: Miscellaneous.HEIGHT,
+      }),
+      new WallBounds(Miscellaneous.WIDTH),
+    ].forEach((system) => this.game.addSystem(system));
 
-game.start();
-setInterval(() => {
-  game.doGameLoop(performance.now());
-}, TICK_RATE);
+    [new Floor(160), new Player()].forEach((entity) =>
+      this.game.addEntity(entity),
+    );
 
-const server = Bun.serve<>({
-  port: 8080,
-  fetch(req, server) {
-    server.upgrade(req, {
-      data: {},
+    this.game.start();
+    setInterval(() => {
+      this.game.doGameLoop(performance.now());
+    }, TICK_RATE);
+
+    this.server = Bun.serve<any>({
+      websocket: {
+        open(ws) {
+          ws.subscribe("the-group-chat");
+          ws.publish("the-group-chat", msg);
+        },
+        message(ws, message) {
+          // this is a group chat
+          // so the server re-broadcasts incoming message to everyone
+          ws.publish("the-group-chat", `${ws.data.username}: ${message}`);
+        },
+        close(ws) {
+          const msg = `${ws.data.username} has left the chat`;
+          ws.unsubscribe("the-group-chat");
+          ws.publish("the-group-chat", msg);
+        },
+      },
     });
-  },
-  websocket: {
-    // handler called when a message is received
-    async message(ws, message) {
-      console.log(`Received ${message}`);
-    },
-  },
-});
-console.log(`Listening on localhost:${server.port}`);
+  }
+}
+
+new Server();

server/tsconfig.json

@@ -1,21 +1,28 @@
 {
   "compilerOptions": {
-    "lib": ["ESNext"],
+    // add Bun type definitions
+    "types": ["bun-types"],
+
+    // enable latest features
+    "lib": ["esnext"],
     "module": "esnext",
     "target": "esnext",
+
+    // if TS 5.x+
     "moduleResolution": "bundler",
-    "moduleDetection": "force",
-    "allowImportingTsExtensions": true,
-    "strict": true,
-    "downlevelIteration": true,
-    "skipLibCheck": true,
-    "jsx": "preserve",
-    "allowSyntheticDefaultImports": true,
-    "forceConsistentCasingInFileNames": true,
-    "allowJs": true,
     "noEmit": true,
-    "types": [
-      "bun-types" // add Bun global
-    ]
+    "allowImportingTsExtensions": true,
+    "moduleDetection": "force",
+    // if TS 4.x or earlier
+    "moduleResolution": "nodenext",
+
+    "jsx": "react-jsx", // support JSX
+    "allowJs": true, // allow importing `.js` from `.ts`
+    "esModuleInterop": true, // allow default imports for CommonJS modules
+
+    // best practices
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "skipLibCheck": true
   }
 }