# https://coffeescript-cookbook.github.io/chapters/classes_and_objects/cloning

module.exports = cloneDeep = (obj) ->
  if not obj? or typeof obj isnt 'object'
    return obj

  if obj instanceof Date
    return new Date(obj.getTime())

  if obj instanceof RegExp
    flags = ''
    flags += 'g' if obj.global?
    flags += 'i' if obj.ignoreCase?
    flags += 'm' if obj.multiline?
    flags += 'y' if obj.sticky?
    return new RegExp(obj.source, flags)

  newInstance = new obj.constructor

  for key of obj
    newInstance[key] = cloneDeep(obj[key])

  return newInstance