version.js

/*!
 * @author myax <mig_dj@hotmail.com>
 * date 10/26/2018
 * implement pa-dss version tag
 */
class Tag {
  constructor() {
    this._tagRegex = /\d+\.\d+\.\d+\.\d+\.\d+/;
    this._major = 0;
    this._minor = 0;
    this._secure = 0;
    this._crud = 0;
    this._interface = 0;
  }
  /**
   * @param {String} tag  `''` tag version to parse
   * @private
   */
  parse(tag) {
    if (typeof tag == "string" && this._tagRegex.test(tag.trim())) {
      const tagElements = tag.split(".");
      this._major = parseInt(tagElements[0]);
      this._minor = parseInt(tagElements[1]);
      this._secure = parseInt(tagElements[2]);
      this._crud = parseInt(tagElements[3]);
      this._interface = parseInt(tagElements[4]);
    } else {
      throw this.error("Invalid tag pattern", 1);
    }
  }
  /**
   * @param {String} message  `Error` Error message
   * @param {Number} code  `0` Error code
   * @private
   */
  error(message = "Error", code = 0) {
    return {
      message: message,
      code: code
    };
  }

  /**
   * increase tag version
   * @param {Number} tag  `` tag version
   * @param {String} mode  `` change mode
   * @public
   */
  up(tag, mode) {
    return this.change(tag, mode, true);
  }
  /**
   * decrease tag version
   * @param {Number} tag  `` tag version
   * @param {String} mode  `` change mode
   * @public
   */
  down(tag, mode) {
    return this.change(tag, mode, false);
  }
  /**
   * decrease tag version
   * @param {Number} tag  `` tag version
   * @param {String} mode  `` change mode ['major', 'minor', 'secure', 'crud', 'interface']
   * @param {Boolean} inc  `false` increase or decrease tag version
   * @private
   */
  change(tag, mode, inc) {
    this.parse(tag);
    const add = inc ? 1 : -1;
    switch (mode) {
      case "major":
        {
          this._major += add;
          this._minor = 0;
          this._secure = 0;
          this._crud = 0;
          this._interface = 0;
        }
        break;
      case "minor":
        {
          this._minor += add;
          this._secure = 0;
          this._crud = 0;
          this._interface = 0;
        }
        break;
      case "secure":
        {
          this._secure += add;
        }
        break;
      case "crud":
        {
          this._crud += add;
        }
        break;
      case "interface":
        {
          this._interface += add;
        }
        break;
      default:
        break;
    }
    return [
      this._major,
      this._minor,
      this._secure,
      this._crud,
      this._interface
    ].join(".");
  }
}

// export default Tag;
module.exports = new Tag();