package main

import (
	"encoding/json"
	"fmt"
	"html/template"
	"log"
	"os"
)

type Testy struct {
	Flag *bool     `json:"flag"`
	Cake *[]string `json:"cake"`
}

const TEXT = `{
	"cake": [
		"one",
		"two",
		"three"
	]
}`

const TEMPLATE = `Flag is: {{if .Flag}}{{.Flag}}{{else}}[none]{{end}}
Cake is: {{if .Cake}}{{range .Cake}}{{.}} {{end}}{{else}}[none]{{end}}
`

func main() {
	var t Testy
	json.Unmarshal([]byte(TEXT), &t)

	tmpl, err := template.New("mytemplate").Parse(TEMPLATE)
	if err != nil {
		log.Fatal(err)
	}

	tmpl.Execute(os.Stdout, t)

	b, err := json.Marshal(t)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(string(b))
}