mermaid/src/logger.js

/**
 * #logger
 * logger = require('logger').create()
 * logger.info("blah")
 * => [2011-3-3T20:24:4.810 info (5021)] blah
 * logger.debug("boom")
 * =>
 * logger.level = Logger.levels.debug
 * logger.debug(function() { return "booom" })
 * => [2011-3-3T20:24:4.810 error (5021)] booom
 */

const LEVELS = {
  debug: 1,
  info: 2,
  warn: 3,
  error: 4,
  fatal: 5,
  default: 5
}

var defaultLevel = LEVELS.error

// exports.setLogLevel = function (level) {
//     defaultLevel = level;
// };

function formatTime (timestamp) {
  var hh = timestamp.getUTCHours()
  var mm = timestamp.getUTCMinutes()
  var ss = timestamp.getSeconds()
  var ms = timestamp.getMilliseconds()
    // If you were building a timestamp instead of a duration, you would uncomment the following line to get 12-hour (not 24) time
    // if (hh > 12) {hh = hh % 12;}
    // These lines ensure you have two-digits
  if (hh < 10) {
    hh = '0' + hh
  }
  if (mm < 10) {
    mm = '0' + mm
  }
  if (ss < 10) {
    ss = '0' + ss
  }
  if (ms < 100) {
    ms = '0' + ms
  }
  if (ms < 10) {
    ms = '00' + ms
  }
    // This formats your string to HH:MM:SS
  var t = hh + ':' + mm + ':' + ss + ' (' + ms + ')'
  return t
}

function format (level) {
  const time = formatTime(new Date())
  return '%c ' + time + ' :%c' + level + ': '
}

var debug = function () {}
var info = function () {}
var warn = function () {}
var error = function () {}
var fatal = function () {}

/**
 * logLevel , decides the amount of logging to be used.
 *    * debug: 1
 *    * info: 2
 *    * warn: 3
 *    * error: 4
 *    * fatal: 5
 */
exports.setLogLevel = function (level) {
  switch (level) {
    case 1:
      exports.Log.debug = window.console.debug.bind(window.console, format('DEBUG', name), 'color:grey;', 'color: green;')
    case 2:
      exports.Log.info = window.console.debug.bind(window.console, format('INFO', name), 'color:grey;', 'color: info;')
    case 3:
      exports.Log.warn = window.console.debug.bind(window.console, format('INFO', name), 'color:grey;', 'color: orange;')
    case 4:
      exports.Log.error = window.console.debug.bind(window.console, format('ERROR', name), 'color:grey;', 'color: red;')
    case 5:
      exports.Log.fatal = window.console.debug.bind(window.console, format('FATAL', name), 'color:grey;', 'color: red;')
  }
}

exports.Log = {
  debug: debug,
  info: info,
  warn: warn,
  error: error,
  fatal: fatal
}