linx-simulator2/src/utils.js

const fs = require('fs');
const moment = require('moment');

module.exports.writeLog = async (value) => {
	return new Promise(async (resolve, reject) => {
		await fs.writeFile('./logs/simulator.log', `[${moment().format('YYYY-MM-DD HH:mm:ss')}] ${value}\n`,  {'flag':'a'}, (err) => {
			if (err) { reject(err); }
			else { resolve(); }
		});
	});
}

module.exports.writeErrorLog = async (value) => {
	return new Promise(async (resolve, reject) => {
		console.log(`ERROR: ${value}`);
		await fs.writeFile('./logs/error.log', `[${moment().format('YYYY-MM-DD HH:mm:ss')}] ${value}\n`,  {'flag':'a'}, (err) => {
			if (err) { reject(err); }
			else { resolve(); }
		});
	});
}