/*
 * Copyright (C) 2019 StApps
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <https://www.gnu.org/licenses/>.
 */
import {LogLevel} from '../logger';
import {Transformation} from '../transformation';

/**
 * Transformation that adds a timestamp to output
 */
export class Timestamp implements Transformation {
  /**
   * Keep this transformation in production environments
   */
  useInProduction = true;

  /**
   * Add timestamp to output
   *
   * @param _logLevel Log level to add timestamp to output for
   * @param output Output to add timestamp to
   */
  transform(_logLevel: LogLevel, output: string): string {
    return `[${new Date().toISOString()}] ${output}`;
  }
}