twong-flutter/lib/config/protocols.dart

enum ProtocolType {
  USER,
  VIP,
  PRIVATE,
}

class Protocols {
  static Map<ProtocolType, String> protocols = {
    ProtocolType.USER : 'Here is user protocol',
    ProtocolType.VIP: 'Welcome ! Here is VIP protocol',
    ProtocolType.PRIVATE: 'Welcome ! Here is private protocol',
  };

  static Map<ProtocolType, String> protocolNames = {
    ProtocolType.USER : '用户注册协议',
    ProtocolType.VIP: '美天旺会员协议',
    ProtocolType.PRIVATE: '隐私政策',
  };

  static String getType(ProtocolType type) => protocols[type];
  static String getTitle(ProtocolType type) => protocolNames[type];
}