tln-pm/src/logger.js

Project Management as Code

'use strict';

class Logger {

  constructor(verbose) {
    // console.time('logger');
    this.verbose = 3 - verbose;
    const levels = ['trace', 'debug', 'info', 'warn', 'error', 'fatal'];
    // normalize verbose level
    if (this.verbose < 0 ) this.verbose = 0;
    if (this.verbose >= levels.length ) this.verbose = levels.length - 1;
    //
    const log4js = require('log4js');
    log4js.configure({
      appenders: {
        /*
        logfile: { type: 'file', filename: '/tmp/tln.log' },
        */
        console: {
          type: 'stdout',
          layout: {
            type: 'pattern',
            pattern: '%p: %m'
          }
        }
      },
      categories: {
        default: {
          appenders: [
            /*'logfile',*/
            'console'
          ],
          level: levels[this.verbose]
        }
      }
    });
    this.logger = log4js.getLogger();
    // console.timeEnd('logger');
  }
  trace(...args) { this.logger.trace.apply(this.logger, args); }
  debug(...args) { this.logger.debug.apply(this.logger, args); }
  info(...args) { this.logger.info.apply(this.logger, args); }
  warn(...args) { this.logger.warn.apply(this.logger, args); }
  error(...args) { this.logger.error.apply(this.logger, args); }
  fatal(...args) { this.logger.fatal.apply(this.logger, args); }
  con(...args) { console.log.apply(console, args); }
}

module.exports.create = (verbose) => {
  return new Logger(verbose);
}