apiresolv

main.dart

void main() {
  
  print(ApiResolver.v1?.foo);
  print(ApiResolver.v1?.bar);
  print(ApiResolver.v1?.baz);

  print(ApiResolver.v2?.foo);
  print(ApiResolver.v2?.bar);
  print(ApiResolver.v2?.baz);

}

abstract class ApiVer{
  final String ver;
  
  const ApiVer(this.ver);
  
  String get foo => '$ver/foo';
  
  String get bar => '$ver/bar';
  
  String get baz => '$ver/baz';
}

class AV1 extends ApiVer{
  const AV1() : super('v1');
}


class AV2 extends ApiVer{ 
  const AV2() : super('v2');   
}


class ApiResolver {
  
  static const _apis = <String, ApiVer>{'v1' : AV1(),'v2' : AV2(),};
  
  static ApiVer? get v1 => _apis['v1'];
  static ApiVer? get v2 => _apis['v2'];

  
}