pretty print JSON (made with https://codeeval.dev)

main.go

package main

import (
	"fmt"
	"encoding/json"
	"github.com/tidwall/pretty"
)

var prettyOpts = pretty.Options{
	Width:  80,
	Prefix: "",
	Indent: "  ",
	// sorting keys only slightly slower
	SortKeys: true,
}

// pretty-print if valid JSON. If not, return unchanged
// about 4x faster than naive version using json.Unmarshal() + json.Marshal()
func ppJSON(js []byte) []byte {
	if !json.Valid(js) {
		return js
	}
	return pretty.PrettyOptions(js, &prettyOpts)
}

func main() {
	js := `{"requests": [
  { "id": "0a4da7d6-e93c-4ba8-a87c-c505e8bc81c8",  "table": "block" }
 ]}`
	res := ppJSON([]byte(js))
	fmt.Printf("formatted JSON:\n%s\n", string(res))
}