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import { Game } from "@engine/Game";
import { Entity } from "@engine/entities";
import { Grid } from "@engine/structures";
import {
WallBounds,
FacingDirection,
Render,
Physics,
Input,
Collision,
NetworkUpdate,
} from "@engine/systems";
import {
type MessageQueueProvider,
type MessagePublisher,
type MessageProcessor,
type Message,
type EntityAddBody,
MessageType,
} from "@engine/network";
import { stringify, parse } from "@engine/utils";
class ClientMessageProcessor implements MessageProcessor {
private game: Game;
constructor(game: Game) {
this.game = game;
}
public process(message: Message) {
switch (message.type) {
case MessageType.NEW_ENTITY:
const entityAddBody = message.body as unknown as EntityAddBody;
this.game.addEntity(
Entity.from(entityAddBody.entityName, entityAddBody.args),
);
break;
}
console.log(message);
}
}
class ClientSocketMessageQueueProvider implements MessageQueueProvider {
private socket: WebSocket;
private messages: Message[];
constructor(socket: WebSocket) {
this.socket = socket;
this.messages = [];
this.socket.addEventListener("message", (e) => {
const message = parse<Message>(e.data);
this.messages.push(message);
});
}
public getNewMessages() {
return this.messages;
}
public clearMessages() {
this.messages = [];
}
}
class ClientSocketMessagePublisher implements MessagePublisher {
private socket: WebSocket;
private messages: Message[];
constructor(socket: WebSocket) {
this.socket = socket;
this.messages = [];
}
public addMessage(message: Message) {
this.messages.push(message);
}
public publish() {
this.messages.forEach((message: Message) =>
this.socket.send(stringify(message)),
);
}
}
export class JumpStorm {
private game: Game;
private clientId: string;
constructor(game: Game) {
this.game = game;
}
public async init(
ctx: CanvasRenderingContext2D,
httpMethod: string,
wsMethod: string,
host: string,
) {
await fetch(`${httpMethod}://${host}/assign`)
.then((resp) => {
if (resp.ok) {
return resp.text();
}
throw resp;
})
.then((cookie) => {
this.clientId = cookie;
});
const grid = new Grid();
const socket = new WebSocket(`${wsMethod}://${host}/game`);
const clientSocketMessageQueueProvider =
new ClientSocketMessageQueueProvider(socket);
const clientSocketMessagePublisher = new ClientSocketMessagePublisher(
socket,
);
const clientMessageProcessor = new ClientMessageProcessor(this.game);
[
this.createInputSystem(),
new FacingDirection(),
new Physics(),
new Collision(grid),
new WallBounds(ctx.canvas.width),
new NetworkUpdate(
clientSocketMessageQueueProvider,
clientSocketMessagePublisher,
clientMessageProcessor,
),
new Render(ctx),
].forEach((system) => this.game.addSystem(system));
}
public play() {
this.game.start();
const loop = (timestamp: number) => {
this.game.doGameLoop(timestamp);
requestAnimationFrame(loop); // tail call recursion! /s
};
requestAnimationFrame(loop);
}
private createInputSystem(): Input {
const inputSystem = new Input(this.clientId);
window.addEventListener("keydown", (e) => {
if (!e.repeat) {
inputSystem.keyPressed(e.key);
}
});
window.addEventListener("keyup", (e) => inputSystem.keyReleased(e.key));
return inputSystem;
}
}
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