maskdata/lib/maskService/UuidMask.js

Node module to mask various kinds of data in the required formats

'use strict';

const MaskHelper = require('../helpers/MaskHelper');
const Constants = require('../helpers/Constants');
const uuidFormat = /[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}/g;

class UuidMask {
  static maskUuid(uuid, options) {
    if (!uuid || typeof uuid !== 'string' || !uuid.match(uuidFormat) || uuid.length !== 36)
      return uuid;
    if (!options) {
      options = Constants.defaultUuidMaskOptions;
    } else {
      options = MaskHelper.mapWithDefaultValues(options, Constants.defaultUuidMaskOptions);
      MaskHelper.validateUuidMaskOptions(options);
    }

    const toBeProcessedUuid = uuid.replaceAll('-', '');

    const start = toBeProcessedUuid.slice(0, options.unmaskedStartCharacters);
    const end = toBeProcessedUuid.slice(32 - options.unmaskedEndCharacters);
    const maskLength =
      toBeProcessedUuid.length - options.unmaskedStartCharacters - options.unmaskedEndCharacters;
    const tempMaskedUuid = start + options.maskWith.repeat(maskLength) + end;

    let maskedUuid =
      tempMaskedUuid.slice(0, 8) +
      '-' +
      tempMaskedUuid.slice(8, 12) +
      '-' +
      tempMaskedUuid.slice(12, 16) +
      '-' +
      tempMaskedUuid.slice(16, 20) +
      '-' +
      tempMaskedUuid.slice(20);

    return maskedUuid;
  }
}

module.exports = UuidMask;