// usage:
const logger = new Logger();
logger.log(

class Logger {
  constructor() {
    this.render = ({ title, out = console.log, color = chalk.reset }) => (...args) => {
      const shortStack = e =>
        e instanceof Error
          ? e.stack
              .split('\n')
              .slice(0, 2)
              .join('\n')
          : e;
      const log = out(color(shortStack()));
      const group = args.length > 1;
      const file = () => {
        const entry = new Error().stack.split('\n')[1];
        return entry ? (entry.match(/([^\\/]+)\)/) || [])[1] : '';
      };

      if (args.length > 1) {
        if (group) console.group(color(title), file());
        args.forEach(log);
        if (group) console.groupEnd();
      } else {
        out(color(args), file());
      }
    };

    this.log = this.render({ title: 'LOG:' });
    this.debug = this.render({ title: 'DEBUG:', log: console.debug, color: chalk.blue });
    this.warn = this.render({ title: 'WARN:', log: console.warn, color: chalk.yellow });
    this.error = this.render({ title: 'ERR:', log: console.error, color: chalk.red });
  }
}