consolereplacer/lib/consolereplacer.js

Replacer of original console methods.

/**
 * Console Replacer
 *
 * @version 1.2.2
 * @author Maplemx
 * @email Maplemx@gmail.com
 */

var fs = require('fs');

function ConsoleReplacer(appName) {
	appName = appName ? appName : 'Unamed App';

	var separator = '\t',
		subtitle = '',
		enabled = true,
		doLogFile = false;

	function formatContent(inputArguments, isDebug) {
		var result = new Date().toLocaleString() + separator + //Time
			'[' + appName + ']' + separator + //App Name
			(subtitle ? subtitle + separator : ''); //Subtitle
		if (isDebug) result = '👉👉👉 ' + result;
		for (var i = 0; i < inputArguments.length; i++) {
			if (typeof(inputArguments[i]) === 'object') {
				try {
					result += JSON.stringify(inputArguments[i]) + separator;
				} catch(e) {
					result += inputArguments[i].toString() + separator;
				}
			} else {
				result += typeof(inputArguments[i]) !== 'undefined' ? inputArguments[i].toString() : 'undefined';
				result += separator;
			}
		}
		return result;
	}

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

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

	this.log = function() {
		outputLog('log', arguments);
	}

	this.info = function() {
		outputLog('info', arguments);
	}

	this.warn = function() {
		outputLog('warn', arguments);
	}

	this.error = function() {
		outputLog('error', arguments);
	}

	this.trace = function() {
		outputLog('trace', arguments);
	}

	this.debug = function() {
		outputLog('log', arguments, true);
	}

	this.debugTrace = function() {
		outputLog('trace', arguments, true);
	}

	this.setSeparator = function(newSeparator) {
		separator = newSeparator;
	}

	this.setSubtitle = function(newSubtitle) {
		subtitle = newSubtitle;
	}

	this.getSubtitle = function() {
		return subtitle;
	}

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

	this.setEnabled = function(newEnabled) {
		enabled = newEnabled;
	}

	this.setAppName = function(newAppName) {
		appName = newAppName;
	}

	this.classic = console;

	return this;
}

module.exports = function(appName){
	return new ConsoleReplacer(appName);
}