jbs-simple-console-logger/logger.js

A simplistic logger class for writing easy to read console.logs

/**
 * @Author: Matthew Auld
 * @Date:   July 23rd, 2017 - 2:54:25 PM
 * @Email:  matthew@jumpbuttonstudio.com
 * @Project: OBND Master Server
 * @Filename: logger.js
 * @Last modified by:   Matthew Auld
 * @Last modified time: August 6th, 2017 - 1:46:10 PM
 * @Copyright: 2017 JumpButton Studio
 */

function Logger(mode) {
	this.startTime = new Date().getTime();
	this.mode = mode;
}

Logger.modes = {
	TRACE: 4,
	DEBUG: 3,
	INFO: 2,
	WARN: 1,
	ERROR: 0
};

Logger.mode_str = ["ERROR", "WARNING", "INFO", "DEBUG", "TRACE"];
Logger.colors = ["\x1b[31m", "\x1b[33m", "\x1b[37m", "\x1b[32m", "\x1b[36m"];
Logger.reset = "\x1b[0m";

Logger.prototype.log = function(type, name, message) {
	var str = "";
	var dt = this.diff(this.startTime, new Date().getTime());
	str += (dt.weeks > 0 ? dt.weeks : "") + (dt.days > 0 ? dt.days + ":" : "") + (dt.hours <= 9 ? "0" + dt.hours : dt.hours) + ":" + (dt.minutes <= 9 ? "0" + dt.minutes : dt.minutes) + ":" + (dt.seconds <= 9 ? "0" + dt.seconds : dt.seconds) + "." + dt.milliseconds + " ";
	if (name.length >= 1) {
		str += "[" + name.toUpperCase() + "] ";
	}

	switch (typeof message) {
		case "object":
			str += JSON.stringify(message);
			break;
		default:
			str += message;
			break;
	}

	if (type <= this.mode) {
		var l = Logger.mode_str[type].length;
		var spaces = 8 - l;
		var padd = "";
		for (var i = 0; i < spaces; i++) {
			padd += " ";
		}
		if (type === 0) {
			console.error(Logger.colors[type], Logger.mode_str[type] + padd + ": " + str + Logger.reset);
		} else {
			console.log(Logger.colors[type], Logger.mode_str[type] + padd + ": " + str + Logger.reset);
		}
	}
};

Logger.prototype.diff = function(date1, date2) {
	var a = new Date(date1).getTime(),
		b = new Date(date2).getTime(),
		diff = {};
	var difference = b - a;

	diff.milliseconds = Math.floor(difference % 1000);
	var str = "" + diff.milliseconds;
	var pad = "0000";
	var ans = pad.substring(0, pad.length - str.length) + str;
	diff.milliseconds = ans;
	difference /= 1000;
	diff.seconds = Math.floor(difference % 60);
	difference /= 60;
	diff.minutes = Math.floor(difference % 60);
	difference /= 60;
	diff.hours = Math.floor(difference % 24);
	difference /= 24;
	diff.days = Math.floor(difference);
	return diff
};

Logger.prototype.setMode = function(mode) {
	this.mode = mode;
};

var logger = new Logger(Logger.modes.TRACE);

function trace(name, message) {
	log(Logger.modes.TRACE, name, message);
}

function debug(name, message) {
	log(Logger.modes.DEBUG, name, message);
}

function info(name, message) {
	log(Logger.modes.INFO, name, message);
}

function warn(name, message) {
	log(Logger.modes.WARN, name, message);
}

function error(name, message) {
	log(Logger.modes.ERROR, name, message);
}

function log(type, name, message) {
	if (message === undefined || message === null) {
		logger.log(type, "", name);
	} else {
		logger.log(type, name, message);
	}
}

module.exports = {
	trace: trace,
	debug: debug,
	info: info,
	warn: warn,
	error: error,
	setMode: function(mode) {
		logger.setMode(mode);
	},
	modes: Logger.modes
};