kernel-swarm-client/src/index.ts

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import {
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callModule as callModuleKernel,
connectModule as connectModuleKernel,
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} from "libkernel";
import {
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callModule as callModuleModule,
connectModule as connectModuleModule,
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} from "libkmodule";
import { EventEmitter } from "events";
import { DataFn, ErrTuple } from "libskynet";
import { Buffer } from "buffer";
const DHT_MODULE = "AQD1IgE4lTZkq1fqdoYGojKRNrSk0YQ_wrHbRtIiHDrnow";
let callModule: typeof callModuleModule,
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connectModule: typeof connectModuleModule;
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if (window.document) {
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callModule = callModuleKernel;
connectModule = connectModuleKernel;
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} else {
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callModule = callModuleModule;
connectModule = connectModuleModule;
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}
export class DHT {
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public async connect(pubkey: string): Promise<Socket> {
const [resp, err] = await callModule(DHT_MODULE, "connect", { pubkey });
if (err) {
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throw new Error(err);
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}
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return new Socket(resp.id);
}
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async ready(): Promise<ErrTuple> {
return callModule(DHT_MODULE, "ready");
}
public async addRelay(pubkey: string): Promise<void> {
const [, err] = await callModule(DHT_MODULE, "addRelay", { pubkey });
if (err) {
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throw new Error(err);
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}
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}
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}
export class Socket extends EventEmitter {
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private id: number;
private eventUpdates: { [event: string]: DataFn[] } = {};
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constructor(id: number) {
super();
this.id = id;
}
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on(eventName: string, listener: (...args: any[]) => void): this {
const [update, promise] = connectModule(
DHT_MODULE,
"listenSocketEvent",
{ id: this.id, event: eventName },
(data: any) => {
this.emit(eventName, data);
}
);
this.trackEvent(eventName, update);
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promise.then(() => {
this.off(eventName, listener);
});
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return super.on(eventName, listener);
}
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off(type: string, listener: any): this {
const updates = [...this.eventUpdates[type]];
this.eventUpdates[type] = [];
for (const func of updates) {
func({ action: "off" });
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}
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return super.off(type, listener);
}
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write(message: string | Buffer): void {
callModule(DHT_MODULE, "write", { id: this.id, message });
}
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end(): void {
callModule(DHT_MODULE, "close", { id: this.id });
}
private ensureEvent(event: string): void {
if (!(event in this.eventUpdates)) {
this.eventUpdates[event] = [];
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}
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}
private trackEvent(event: string, update: DataFn): void {
this.ensureEvent(event as string);
this.eventUpdates[event].push(update);
}
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}