Number.toLocaleString() Enterprise Edition

formatNumberBySplittingPlaceValuesWithDots.js

export const NUMBER_ZERO_AS_BASE_2_STRING = '0'
export const NUMBER_THREE_AS_BASE_4_STRING = '3'
export const NUMBER_FORTY_SIX_AS_BASE_35_STRING = '1b'

export const NUMBER_ZERO_IN_BASE_10 = parseInt(NUMBER_ZERO_AS_BASE_2_STRING, 2)
export const NUMBER_THREE_IN_BASE_10 = parseInt(NUMBER_THREE_AS_BASE_4_STRING, 4)
export const NUMBER_FORTY_SIX_IN_BASE_10 = parseInt(NUMBER_FORTY_SIX_AS_BASE_35_STRING, 35)

export const PLACE_VALUE_LENGTH = NUMBER_THREE_IN_BASE_10
export const DOT_CHARACTER_CODE = NUMBER_FORTY_SIX_IN_BASE_10
export const DOT_CHARACTER_AS_STRING = String.fromCharCode(DOT_CHARACTER_CODE)
export const EMPTY_ARRAY = new Array(NUMBER_ZERO_IN_BASE_10)

export const JAVASCRIPT_NUMBER_TYPE_NAME = 'number'

export const NUMBER_VALIDATION_ERROR_NAME = 'NumberTypeValidationError'
export const NUMBER_VALIDATION_ERROR_MESSAGE = 'Input type should be "' + JAVASCRIPT_NUMBER_TYPE_NAME + '"'

export class NumberTypeValidationError extends Error {
  constructor (errorMessageString) {
    super(errorMessageString)
    this.name = NUMBER_VALIDATION_ERROR_NAME
  }
}

export function formatNumberBySplittingPlaceValuesWithDots (inputNumberArgument) {
  if (typeof inputNumberArgument !== JAVASCRIPT_NUMBER_TYPE_NAME) {
    throw new NumberTypeValidationError(NUMBER_VALIDATION_ERROR_MESSAGE)
  }

  const numberWithoutFractionalPart = Math.floor(inputNumberArgument)
  const wholeNumberConvertedToString = numberWithoutFractionalPart.toString()

  const numberSplittedByPlaceValuesButInReverse = [...EMPTY_ARRAY]
  for (let forLoopCurrentDigitPositionIndex = wholeNumberConvertedToString.length; forLoopCurrentDigitPositionIndex > NUMBER_ZERO_IN_BASE_10; forLoopCurrentDigitPositionIndex -= PLACE_VALUE_LENGTH) {
    numberSplittedByPlaceValuesButInReverse.push(
      wholeNumberConvertedToString.slice(
        forLoopCurrentDigitPositionIndex - PLACE_VALUE_LENGTH,
        forLoopCurrentDigitPositionIndex
      )
    )
  }

  const numberSplittedByPlaceValuesInRightOrder = numberSplittedByPlaceValuesButInReverse.reverse()

  const splittedNumberJoinedWithDots = numberSplittedByPlaceValuesInRightOrder.join(DOT_CHARACTER_AS_STRING)
  return splittedNumberJoinedWithDots
}

export default formatNumberBySplittingPlaceValuesWithDots