consolereplacer/lib/consolereplacer.es6.js

Replacer of original console methods.

/**
 * Console Replacer
 *
 * @version 1.2.1
 * @author Maplemx
 * @email Maplemx@gmail.com
 */

import * as fs from 'fs';

class ConsoleReplacer {
	constructor() {
		let constructResult = {},
			separator = '\t',
			appName = 'unnamedApp',
			subtitle = '',
			enabled = true,
			doLogFile = false;

		function formatContent(inputArguments) {
			let result =
					new Date().toLocaleString() + separator + //Time
					'[' + appName + ']' + separator + //AppName
					(subtitle ? subtitle + separator : ''); //Subtitle
			for (let contentItem of Array.from(inputArguments).values()) {
				if (typeof(contentItem) === 'object') {
					try {
						result += JSON.stringify(contentItem) + separator;
					} catch(e) {
						result += contentItem.toString() + separator;
					}
				} else {
					result += typeof(contentItem) !== 'undefined' ? contentItem.toString() : 'undefined';
					result += separator;
				}
			}
			return result;
		}

		function logContentToFile(contentString) {
			let now = new Date();
			fs.open(
				'./' + appName + '_logs/' + appName + '_' + (1900 + now.getYear()) + '_' + (now.getMonth() + 1) + '_' + now.getDate() + '.log',
				'a',
				(e, fd) => {
					fs.writeSync(fd, contentString + '\n');
					fs.close(fd);
				}
			);
		}

		function outputLog(consoleMethod, inputArguments, isDebug) {
				if (enabled){
					let contentString = formatContent(inputArguments)
					console[consoleMethod](contentString);
					if (doLogFile && !isDebug) {
						logContentToFile(contentString);
					}
				} else {
					return false;
				}
		}

		//Mass process of console methods
		let methodsArray = ['log','trace','warn','error','info'];
		for (let consoleMethod of methodsArray.values()) {
			this[consoleMethod] = (...inputArguments) => {
				outputLog(consoleMethod, inputArguments);
			}
		};

		this.debug = (...inputArguments) => {
			inputArguments.unshift('👉👉👉 ');
			outputLog('trace', inputArguments, true);
		};

		this.setSeparator = (newSeparator) => separator = newSeparator;

		this.setSubtitle = (newSubtitle) => subtitle = newSubtitle;

		this.getSubtitle = () => subtitle;

		this.setLogFile = (newDoLogFile) => {
			doLogFile = newDoLogFile;
			if (doLogFile) {
				try {
					fs.mkdirSync('./' + appName + '_logs');
				} catch(e) {
					if (e.code !== 'EEXIST') throw e;
				}
			}
		}

		this.setEnabled = (newEnabled) => enabled = newEnabled;

		this.setAppName = (newAppName) => appName = newAppName;
	}
}

let consoleReplacer = new ConsoleReplacer();

export { consoleReplacer };