systemquery/src/lib/agent/Agent.mjs

"use strict";

import fs from 'fs';
import os from 'os';

import log from 'log'; const l = log.get("Agent");
import systeminfo from 'systeminformation';

import PeerServer from './PeerServer.mjs';
import hash from '../crypto/hash.mjs';
import parse_peer_name from '../parse/peer_name.mjs';

class Agent {
	constructor(config) {
		this.config = config;
	}
	
	async find_secret() {
		if(this.config.secret_join_filepath !== "CHANGE_ME"
		&& fs.existsSync(this.config.secret_join_filepath))
			return await fs.promises.readFile(this.config.secret_join_filepath, "utf-8");
		
		if(this.config.secret_join !== "CHANGE_ME")
			return this.config.secret_join;
		
		return null;
	}
	
	async init() {
		/** Our peer id - calculated automatically from the system's uuid */
		this.peer_id = hash("sha256", "base64", await systeminfo.system().serial)
			.replace(/[+/=]/g, "");
		this.peer_name = os.hostname();
		
		this.server = new PeerServer(
			this.peer_id,
			await this.find_secret()
		);
		this.server.retries = this.config.net.peer_retries;
		
		l.log(`Starting peer listener....`);
		await this.server.listen(
			this.config.net.port,
			this.config.net.bind_address
		);
		l.log(`Listening on ${this.config.net.bind_address}:${this.config.net.port}`);
		
		await this.server.add_peers(...this.config.peers.map(
			peer => parse_peer_name(peer)
		));
		l.log(`Added ${this.config.peers.length} initial peers`);
		if(this.config.peers.length < 1)
			l.warn(`No initial peers were specified! It's recommended that you specify at least 1 on every host.`);
	}
}

export default Agent;