refactor: structure

src/client/client.js

@@ -0,0 +1,19 @@
+export default class Client {
+  constructor() {
+    this.listeners = [];
+  }
+  accept(data) {
+    for (const i in this.listeners) {
+      this.listeners[i](data);
+    }
+  }
+  addMessageListener(listener) {
+    this.listeners.push(listener);
+  }
+  removeMessageListener(listener) {
+    const index = this.listeners.indexOf(listener);
+    if (-1 !== index) {
+      this.listeners.splice(index, 1);
+    }
+  }
+}

src/client/local.js

@@ -1,8 +1,8 @@
-import Server from './server.js';
+import Client from './client.js';
 
-export default class Local extends Server {
+export default class LocalClient extends Client {
   async connect() {
-    this.worker = new Worker('/server/worker.js', {type: 'module'});
+    this.worker = new Worker('../server/worker.js', {type: 'module'});
     this.worker.onmessage = (event) => {
       this.accept(event.data);
     };

src/client/remote.js

@@ -1,8 +1,8 @@
-import Server from './server.js';
+import Client from './client.js';
 
-export default class Remote extends Server {
+export default class RemoteClient extends Client {
   async connect() {
-    this.socket = new WebSocket('/ws');
+    this.socket = new WebSocket(`ws://${window.location.host}/ws`);
     this.socket.onmessage = (event) => {
       for (const i in this.listeners) {
         this.listeners[i](JSON.parse(event.data));

src/components/entities.jsx

@@ -1,9 +1,4 @@
-import {
-  Sprite,
-} from '@pixi/react';
-import {useContext, useEffect, useState} from 'react';
-
-import ServerContext from '../context/server';
+import {Sprite} from '@pixi/react';
 
 export default function Entities({entities}) {
   return (

src/components/pixi.jsx

@@ -5,12 +5,12 @@ import {
 import {useContext, useEffect, useState} from 'react';
 
 import {RESOLUTION} from '../constants.js';
-import ServerContext from '../context/server';
+import ClientContext from '../context/client';
 import Entities from './entities';
 import styles from './pixi.module.css';
 
 export default function Pixi() {
-  const server = useContext(ServerContext);
+  const client = useContext(ClientContext);
   const [entities, setEntities] = useState({});
   useEffect(() => {
     function onMessage(message) {
@@ -27,9 +27,9 @@ export default function Pixi() {
         default:
       }
     }
-    server.addMessageListener(onMessage);
+    client.addMessageListener(onMessage);
     return () => {
-      server.removeMessageListener(onMessage);
+      client.removeMessageListener(onMessage);
     };
   });
   return (

src/components/silphius.jsx

@@ -1,41 +1,41 @@
 import {useEffect, useState} from 'react';
 
-import ServerContext from '../context/server.js';
+import ClientContext from '../context/client.js';
 import Title from './title';
 import Ui from './ui';
 
 export default function Silphius() {
   const connectionTuple = useState();
-  const [server, setServer] = useState();
+  const [client, setClient] = useState();
   useEffect(() => {
     if (!connectionTuple[0]) {
       return;
     }
     async function connect() {
-      let Server;
+      let Client;
       switch (connectionTuple[0]) {
         case 'local':
-          ({default: Server} = await import('../server/local.js'));
+          ({default: Client} = await import('../client/local.js'));
           break;
         case 'remote':
-          ({default: Server} = await import('../server/remote.js'));
+          ({default: Client} = await import('../client/remote.js'));
           break;
       }
-      const server = new Server();
-      await server.connect();
-      server.send({type: 'connect'});
-      setServer(server);
+      const client = new Client();
+      await client.connect();
+      client.send({type: 'connect'});
+      setClient(client);
     }
     connect();
   }, [connectionTuple[0]]);
   return (
     connectionTuple[0]
       ? (
-        server
+        client
           ? (
-            <ServerContext.Provider value={server}>
+            <ClientContext.Provider value={client}>
               <Ui />
-            </ServerContext.Provider>
+            </ClientContext.Provider>
           )
           : null
       )

src/components/ui.jsx

@@ -2,7 +2,7 @@ import {useContext, useEffect} from 'react';
 
 import addKeyListener from '../add-key-listener.js';
 import {RESOLUTION} from '../constants';
-import ServerContext from '../context/server';
+import ClientContext from '../context/client';
 import Dom from './dom';
 import Pixi from './pixi';
 import styles from './ui.module.css';
@@ -23,11 +23,11 @@ const KEY_MAP = {
 
 export default function Ui() {
   // Key input.
-  const server = useContext(ServerContext);
+  const client = useContext(ClientContext);
   useEffect(() => {
     return addKeyListener(document.body, ({type, payload}) => {
       if (type in KEY_MAP && payload in ACTION_MAP) {
-        server.send({
+        client.send({
           type: 'action',
           payload: {
             type: ACTION_MAP[payload],

src/server/engine.js

@@ -1,65 +0,0 @@
-const SPEED = 100;
-const TPS = 60;
-
-const MOVE_MAP = {
-  'moveUp': 0,
-  'moveRight': 1,
-  'moveDown': 2,
-  'moveLeft': 3,
-};
-
-export default class Engine {
-
-  constructor() {
-    this.dude = {
-      image: './assets/bunny.png',
-      movement: [0, 0, 0, 0],
-      position: [50, 50],
-    };
-    this.frame = 0;
-    this.last = Date.now();
-  }
-
-  accept({type, payload}) {
-    switch (type) {
-      case 'connect': {
-        this.send({type: 'connected', payload: {dude: this.dude}});
-        break;
-      }
-      case 'action': {
-        if (payload.type in MOVE_MAP) {
-          this.dude.movement[MOVE_MAP[payload.type]] = payload.value;
-        }
-        break;
-      }
-      default:
-    }
-  }
-
-  send(data) {
-    throw new Exception('Engine::send is virtual!');
-  }
-
-  start() {
-    return setInterval(() => {
-      const elapsed = (Date.now() - this.last) / 1000;
-      this.last = Date.now();
-      this.tick(elapsed);
-    }, 1000 / TPS);
-  }
-
-  tick(elapsed) {
-    this.dude.position[0] += SPEED * elapsed * (this.dude.movement[1] - this.dude.movement[3]);
-    this.dude.position[1] += SPEED * elapsed * (this.dude.movement[2] - this.dude.movement[0]);
-    this.send({
-      type: 'tick',
-      payload: {
-        entities: {dude: this.dude},
-        elapsed,
-        frame: this.frame,
-      },
-    });
-    this.frame += 1;
-  }
-
-}

src/server/server.js

@@ -1,19 +1,61 @@
+const SPEED = 100;
+const TPS = 60;
+
+const MOVE_MAP = {
+  'moveUp': 0,
+  'moveRight': 1,
+  'moveDown': 2,
+  'moveLeft': 3,
+};
+
 export default class Server {
+
   constructor() {
-    this.listeners = [];
+    this.dude = {
+      image: './assets/bunny.png',
+      movement: [0, 0, 0, 0],
+      position: [50, 50],
+    };
+    this.frame = 0;
+    this.last = Date.now();
   }
-  accept(data) {
-    for (const i in this.listeners) {
-      this.listeners[i](data);
+
+  accept({type, payload}) {
+    switch (type) {
+      case 'connect': {
+        this.send({type: 'connected', payload: {dude: this.dude}});
+        break;
+      }
+      case 'action': {
+        if (payload.type in MOVE_MAP) {
+          this.dude.movement[MOVE_MAP[payload.type]] = payload.value;
+        }
+        break;
+      }
+      default:
     }
   }
-  addMessageListener(listener) {
-    this.listeners.push(listener);
+
+  start() {
+    return setInterval(() => {
+      const elapsed = (Date.now() - this.last) / 1000;
+      this.last = Date.now();
+      this.tick(elapsed);
+    }, 1000 / TPS);
   }
-  removeMessageListener(listener) {
-    const index = this.listeners.indexOf(listener);
-    if (-1 !== index) {
-      this.listeners.splice(index, 1);
-    }
+
+  tick(elapsed) {
+    this.dude.position[0] += SPEED * elapsed * (this.dude.movement[1] - this.dude.movement[3]);
+    this.dude.position[1] += SPEED * elapsed * (this.dude.movement[2] - this.dude.movement[0]);
+    this.send({
+      type: 'tick',
+      payload: {
+        entities: {dude: this.dude},
+        elapsed,
+        frame: this.frame,
+      },
+    });
+    this.frame += 1;
   }
+
 }

src/server/socket.js

@@ -1,6 +1,6 @@
 import {WebSocketServer} from 'ws';
 
-import Engine from './engine.js';
+import Server from './server.js';
 
 const {
   SILPHIUS_WEBSOCKET_PORT = 8080
@@ -9,7 +9,7 @@ const {
 const wss = new WebSocketServer({port: SILPHIUS_WEBSOCKET_PORT});
 
 wss.on('connection', function connection(ws) {
-  const server = new class WorkerEngine extends Engine {
+  const server = new class SocketServer extends Server {
     send(data) { ws.send(JSON.stringify(data)); }
   }
   ws.on('message', function message(data) {

src/server/worker.js

@@ -1,6 +1,6 @@
-import Engine from './engine.js';
+import Server from './server.js';
 
-const server = new class WorkerEngine extends Engine {
+const server = new class WorkerServer extends Server {
   send(data) { postMessage(data); }
 }