cli.js

'use strict';

const { Colorizer } = require('./colorize');
const { Padder } = require('./pad-levels');
const { configs, MESSAGE } = require('triple-beam');


/**
 * Cli format class that handles initial state for a a separate
 * Colorizer and Padder instance.
 */
class CliFormat {
  constructor(opts = {}) {
    if (!opts.levels) {
      opts.levels = configs.cli.levels;
    }

    this.colorizer = new Colorizer(opts);
    this.padder = new Padder(opts);
    this.options = opts;
  }

  /*
   * function transform (info, opts)
   * Attempts to both:
   * 1. Pad the { level }
   * 2. Colorize the { level, message }
   * of the given `logform` info object depending on the `opts`.
   */
  transform(info, opts) {
    this.colorizer.transform(
      this.padder.transform(info, opts),
      opts
    );

    info[MESSAGE] = `${info.level}:${info.message}`;
    return info;
  }
}

/*
 * function cli (opts)
 * Returns a new instance of the CLI format that turns a log
 * `info` object into the same format previously available
 * in `winston.cli()` in `winston < 3.0.0`.
 */
module.exports = opts => new CliFormat(opts);

//
// Attach the CliFormat for registration purposes
//
module.exports.Format = CliFormat;