json2nats/main.go

package main

import (
	"flag"
	"fmt"
	"os"
)

func main() {
	var fi, fo string
	flag.Usage = func() {
		fmt.Println("json2nats version v0.2")
		flag.PrintDefaults()
	}
	flag.StringVar(&fi, "i", "default.json", "Json file name")
	flag.StringVar(&fo, "o", "", "Output file name")
	flag.Parse()

	bi, err := os.ReadFile(fi)
	if err != nil {
		panic(err)
	}
	fmt.Println("[OK] Read json file:", fi)

	var bo []byte = make([]byte, 0)
	for i := range bi {
		switch bi[i] {
		case ' ':
		case '\n':
		case '\r':
			// do nothing.
		case '"':
			bo = append(bo, []byte(`\"`)...)
		case ',':
			bo = append(bo, []byte(`, `)...)
		default:
			bo = append(bo, bi[i])
		}
	}

	fmt.Println("[OK] Make nats tool string:")

	if fo != "" {
		err = os.WriteFile(fo, bo, 0644)
		if err != nil {
			panic(err)
		}
		fmt.Println("[OK] Write to:", fo)
	}

	fmt.Println(string(bo))
}