基于TypeScript装饰器与AirDesensitize类的前端数据脱敏方案

  static TELEPHONE = new AirDesensitizeType(0, '座机号码', 3, 4)
  static MOBILE = new AirDesensitizeType(1, '手机号码', 3, 4)
  static ID_CARD = new AirDesensitizeType(2, '身份证号', 6, 4)
  static BANK_CARD = new AirDesensitizeType(3, '银行卡号', 4, 4)
  static CAR_NUMBER = new AirDesensitizeType(4, '车牌号', 2, 1)
  static EMAIL = new AirDesensitizeType(5, '邮箱', 2, 2)
  static CHINESE_NAME = new AirDesensitizeType(6, '中文名', 1, 1)
  static ADDRESS = new AirDesensitizeType(7, '地址', 3, 0)
  static IP_V4 = new AirDesensitizeType(8, 'IPv4地址', 0, 0)
  static CUSTOM = new AirDesensitizeType(9, '自定义', 0, 0)

/**
 * # 脱敏助手类
 *
 * @author Hamm.cn
 */
export class AirDesensitize {
  /**
   * ## `IPv4` 的块长度
   */
  private static readonly IP_V4_PART_COUNT = 4

  /**
   * ## 字符串替换
   *
   * @param text   原始字符串
   * @param head   头部保留长度
   * @param tail   尾部保留长度
   * @param symbol 中间替换的单个符号
   * @return 替换后的字符串
   */
  public static replace(text: string, head: number, tail: number, symbol: string): string {
    if (head < 0 || tail < 0 || head + tail >= text.length) {
      return text
    }
    let str = ''
    for (let i = 0; i < text.length; i += 1) {
      if (i >= head && i <= text.length - tail - 1) {
        str += symbol
      } else {
        str += text[i]
      }
    }
    return str
  }

  /**
   * ## `IPv4` 地址脱敏
   *
   * @param ipv4   `IPv4` 地址
   * @param symbol [可选]符号
   * @return 脱敏后的 `IPv4` 地址
   */
  public static desensitizeIpv4Address(ipv4: string, symbol = AirConstant.ASTERISK): string {
    const strings = ipv4.split(AirConstant.DOT)
    if (strings.length !== AirDesensitize.IP_V4_PART_COUNT) {
      return ipv4
    }
    const temp = symbol + symbol + symbol
    strings[1] = temp
    strings[2] = temp
    return strings.join(AirConstant.DOT)
  }

  /**
   * ## 文本脱敏
   *
   * @param valueString 原始文本
   * @param type        脱敏类型
   * @param head        头部保留
   * @param tail        尾部保留
   * @param symbol      脱敏符号
   * @return 脱敏后的文本
   */
  public static desensitize(valueString: string, type: AirDesensitizeType, head = 0, tail = 0, symbol = AirConstant.ASTERISK): string {
    switch (type.key) {
      case AirDesensitizeType.BANK_CARD.key:
      case AirDesensitizeType.ID_CARD.key:
      case AirDesensitizeType.MOBILE.key:
      case AirDesensitizeType.ADDRESS.key:
      case AirDesensitizeType.CAR_NUMBER.key:
      case AirDesensitizeType.EMAIL.key:
        head = Math.max(type.head, head)
        tail = Math.max(type.tail, tail)
        break
      case AirDesensitizeType.IP_V4.key:
        return AirDesensitize.desensitizeIpv4Address(valueString, symbol)
      case AirDesensitizeType.CHINESE_NAME.key:
        head = Math.max(type.head, head)
        tail = Math.max(type.tail, tail)
        if (valueString.length <= head + tail) {
          tail = 0
        }
        break
      case AirDesensitizeType.TELEPHONE.key:
        // 包含区号 前后各留4 不包含则各留2
        // eslint-disable-next-line no-case-declarations
        const isContainRegionCode = valueString.length > 8 ? 4 : 2
        head = Math.max(isContainRegionCode, head)
        tail = Math.max(isContainRegionCode, tail)
        break
      default:
    }
    return this.replace(valueString, head, tail, symbol)
  }
}

<el-table-column>
  <!-- ...省略... -->
  <template v-if="columnConfig.desensitize">
    {{ AirDesensitize.desensitize(getColumnRowData(row), columnConfig.desensitize, columnConfig.desensitizeHead, columnConfig.desensitizeTail, columnConfig.desensitizeSymbol) }}
  </template>
  <template v-else>
    getColumnRowData(row)
  </template>
  <!-- ...省略...  -->
</el-table-column>