example.go

package main

import (
	"fmt"
)

type ServiceResponse struct {
	Foobar        string
	SomethingElse bool
}

type ApiResponse interface {
	Respond() interface{}
}

type ApiV1 struct {
	Data ServiceResponse
}

type ApiV2 struct {
	Data ServiceResponse
}

type V1Response struct {
	Banana string
}

type V2Response struct {
	Orange bool
}

func (a ApiV1) Respond() {
	fmt.Println("[*] V1 Respond()")
	fmt.Printf("\t%+v\n", V1Response{Banana: a.Data.Foobar})
}

func (a ApiV2) Respond() {
	fmt.Println("[*] V2 Respond()")
	fmt.Printf("\t%+v\n", V2Response{Orange: a.Data.SomethingElse})
}

func main() {
	v1 := ApiV1{Data: ServiceResponse{Foobar: "halo", SomethingElse: false}}
	v2 := ApiV2{Data: ServiceResponse{Foobar: "counter-strike", SomethingElse: true}}
	fmt.Println("API demo...")
	fmt.Println("V1: ")
	v1.Respond()
	fmt.Println("V2: ")
	v2.Respond()
}