51 lines
1.8 KiB
TypeScript
51 lines
1.8 KiB
TypeScript
import { Callbag, Source } from "callbag";
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import create from "callbag-create";
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import pipe from "callbag-pipe";
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import share from "callbag-share";
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import { Jsonified } from "../ecs/Data";
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import { catchTalkback, defer, interval, makeSubject, map, merge } from "../utilities/Callbag";
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import { ClientMessage, MessageTypes, ServerMessage } from "./LockstepClient";
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type Server<LocalInput, State> = Callbag<ClientMessage<LocalInput, State>, ServerMessage<LocalInput[], State>>;
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/** Connection to a websocket server that handles multiple clients, for schemes where GlobalInput = LocalInput[] */
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export class Connection<LocalInput, State> {
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public constructor(
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private url: string
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) { }
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public readonly socket = defer(() => {
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const ws = new WebSocket(this.url);
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const source: Source<ServerMessage<LocalInput[], State>> = create((data, { }, close) => {
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ws.onopen = () => {
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// fake a HELO message & set state message until the server actually sends them
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data({ t: MessageTypes.META, helo: "Websocket Server" });
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data({ t: MessageTypes.SET_STATE, u: 0, s: {} });
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};
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ws.onmessage = msg => {
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const decoded: Jsonified<ServerMessage<LocalInput[], State>> = JSON.parse(msg.data);
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data(decoded as ServerMessage<LocalInput[], State>);
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};
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ws.onclose = () => {
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close();
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};
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return () => {
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// cleanup
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ws.close();
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};
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});
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return pipe(
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source,
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catchTalkback((message: ClientMessage<LocalInput, State>) => {
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const encoded = JSON.stringify(message);
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ws.send(encoded);
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})
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);
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});
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}
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