GoLang - Check if a (custom) struct is empty

golang_check-struct.go

// Learing GoLang - Check if a (custom) struct is empty
//
// Possible data type
//  {
//      "type": "music",
//      "duration": 200,
//      "musicData": {
//          "title": "Sinfonie op. 2 Nr.4 F-dur 3.Satz Gavot Allegro",
//          "album": null,
//          "artist": "William Boyce",
//          "images": []
//      },
//      "nonMusicData": null
//  }
//
//  {
//      "type": "talk",
//      "duration": 500,
//      "musicData": null
//      "nonMusicData": {
//          "title": "BBC World Service",
//          "program": null,
//          "images": []
//      },
//  }
// 
// Try it out: https://play.golang.org/p/25-uw73l5ug

package main

import (
	"fmt"
	"reflect"
)

type (
	ResponseData struct {
		Type         string           `json:"type"`
		MusicData    MusicDataType    `json:"musicData"`
		NonMusicData NonMusicDataType `json:"nonMusicData"`
	}

	MusicDataType struct {
		Title   string      `json:"title"`
		Album   string      `json:"album"`
		Artist  string      `json:"artist"`
		Images  []ImageType `json:"images"`
	}

	NonMusicDataType struct {
		Title    string      `json:"title"`
		Program  string      `json:"program"`
		Images   []ImageType `json:"images"`
	}

	ImageType struct {
		Url string `json:"url"`
	}
)

func checkObjects(data ResponseData) {
	if (reflect.DeepEqual(data.MusicData, MusicDataType{})) {
		fmt.Println("MusicData is empty")
	} else {
		fmt.Println("MusicData is not empty")
	}
	
	if (reflect.DeepEqual(data.NonMusicData, NonMusicDataType{})) {
		fmt.Println("NonMusicData is empty")
	} else {
		fmt.Println("NonMusicData is not empty")
	}

}

func main() {
	checkObjects(ResponseData{
		MusicData: MusicDataType{
			Title: "Sinfonie op. 2 Nr.4 F-dur 3.Satz Gavot Allegro",
		},
	})
}