84 lines
2.5 KiB
TypeScript
84 lines
2.5 KiB
TypeScript
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import { WebSocket as _WebSocket } from "./ws.js"; /*-browser*/
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import { SocketProvider } from "./provider-socket.js";
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import type { Networkish } from "./network.js";
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export interface WebSocketLike {
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onopen: null | ((...args: Array<any>) => any);
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onmessage: null | ((...args: Array<any>) => any);
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onerror: null | ((...args: Array<any>) => any);
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readyState: number;
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send(payload: any): void;
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close(code?: number, reason?: string): void;
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}
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export type WebSocketCreator = () => WebSocketLike;
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export class WebSocketProvider extends SocketProvider {
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#connect: null | WebSocketCreator;
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#websocket: null | WebSocketLike;
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get websocket(): WebSocketLike {
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if (this.#websocket == null) { throw new Error("websocket closed"); }
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return this.#websocket;
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}
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constructor(url: string | WebSocketLike | WebSocketCreator, network?: Networkish) {
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super(network);
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if (typeof(url) === "string") {
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this.#connect = () => { return new _WebSocket(url); };
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this.#websocket = this.#connect();
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} else if (typeof(url) === "function") {
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this.#connect = url;
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this.#websocket = url();
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} else {
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this.#connect = null;
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this.#websocket = url;
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}
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this.websocket.onopen = async () => {
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try {
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await this._start()
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this.resume();
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} catch (error) {
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console.log("failed to start WebsocketProvider", error);
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// @TODO: now what? Attempt reconnect?
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}
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};
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this.websocket.onmessage = (message: { data: string }) => {
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this._processMessage(message.data);
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};
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/*
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this.websocket.onclose = (event) => {
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// @TODO: What event.code should we reconnect on?
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const reconnect = false;
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if (reconnect) {
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this.pause(true);
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if (this.#connect) {
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this.#websocket = this.#connect();
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this.#websocket.onopen = ...
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// @TODO: this requires the super class to rebroadcast; move it there
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}
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this._reconnect();
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}
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};
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*/
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}
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async _write(message: string): Promise<void> {
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this.websocket.send(message);
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}
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async destroy(): Promise<void> {
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if (this.#websocket == null) { return; }
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this.#websocket.close();
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this.#websocket = null;
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}
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}
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