@akala/core/dist/esm/network/tcp.js

import { EventEmitter } from "../events/event-emitter.js";
import { IsomorphicBuffer } from "../helpers.js";
import { StatefulSubscription } from "../teardown-manager.js";
export class TcpSocketAdapter extends EventEmitter {
    socket;
    constructor(socket) {
        super();
        this.socket = socket;
    }
    pipe(socket) {
        this.on('message', (message) => socket.send(message));
        this.on('close', () => socket.close());
    }
    get open() {
        return !this.socket.closed;
    }
    close() {
        return new Promise(resolve => this.socket.end(resolve));
    }
    send(data) {
        return new Promise((resolve, reject) => this.socket.write(data instanceof IsomorphicBuffer ? data.toArray() : data, err => err ? reject(err) : resolve()));
    }
    messageListeners = [];
    off(event, handler) {
        switch (event) {
            case 'message':
                {
                    let listeners = this.messageListeners;
                    if (handler)
                        listeners = listeners.filter(f => f[0] == handler);
                    var result = false;
                    for (const listener of listeners) {
                        this.socket.off('message', listener[1]);
                        result = !!this.messageListeners.splice(this.messageListeners.indexOf(listener), 1)?.length || result;
                    }
                }
                break;
            case 'close':
            case 'error':
            case 'open':
                //eslint-disable-next-line @typescript-eslint/no-explicit-any
                this.socket.off(event, handler);
                break;
            default:
                throw new Error(`Unsupported event ${String(event)}`);
        }
        return true;
    }
    on(event, handler, options) {
        switch (event) {
            case 'message':
                {
                    const x = function (data) { return handler.call(this, typeof data === 'string' ? data : IsomorphicBuffer.fromBuffer(data)); };
                    this.messageListeners.push([handler, x]);
                    if (options?.once)
                        this.socket.once('data', x);
                    else
                        this.socket.on('data', x);
                    return new StatefulSubscription(() => {
                        this.messageListeners.splice(this.messageListeners.findIndex(x => x[0] === handler), 1);
                        this.socket.off('data', x);
                    }).unsubscribe;
                }
            case 'close':
            case 'error':
            case 'open':
                //eslint-disable-next-line @typescript-eslint/no-explicit-any
                if (options?.once)
                    this.socket.once(event, handler);
                else
                    this.socket.on(event, handler);
                return new StatefulSubscription(() => {
                    this.socket.off(event, handler);
                }).unsubscribe;
            case Symbol.dispose:
                return super.on(event, handler, options);
            default:
                throw new Error(`Unsupported event ${String(event)}`);
        }
    }
    once(event, handler) {
        switch (event) {
            case 'message':
                return this.on(event, handler, { once: true });
            case 'close':
            case 'error':
            case 'open':
            case Symbol.dispose:
                return this.on(event, handler, { once: true });
            default:
                let x = event;
                throw new Error(`Unsupported event ${x}`);
        }
    }
}
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