NSON JSON Converter

nson-json-conv.go

package main

import (
	"compress/flate"
	"flag"
	"io"
	"log"
	"os"
	"strings"
)

func main() {
	// Define command line flags
	input := flag.String("i", "", "Input file path")
	output := flag.String("o", "", "Output file path")
	flag.Parse()

	// Check if input and output are provided
	if *input == "" || *output == "" {
		log.Println("Input and output file paths are required")
		os.Exit(1)
	}

	// Determine mode based on the file extension
	mode := "compress"
	if strings.HasSuffix(*input, ".nson") {
		mode = "decompress"
	}

	// Open input file
	inputFile, err := os.Open(*input)
	if err != nil {
		log.Printf("Failed to open input file: %s\n", err)
		os.Exit(1)
	}
	defer inputFile.Close()

	// Create output file
	outputFile, err := os.Create(*output)
	if err != nil {
		log.Printf("Failed to create output file: %s\n", err)
		os.Exit(1)
	}
	defer outputFile.Close()

	// Set up flate writer or reader
	var stream io.ReadCloser
	var w io.WriteCloser
	if mode == "compress" {
		w, err = flate.NewWriter(outputFile, flate.DefaultCompression)
		if err != nil {
			log.Printf("Failed to create flate writer: %s\n", err)
			os.Exit(1)
		}
		defer w.Close()
	} else {
		stream = flate.NewReader(inputFile)
		defer stream.Close()
	}

	// Perform the compression or decompression
	if mode == "compress" {
		_, err = io.Copy(w, inputFile)
	} else {
		_, err = io.Copy(outputFile, stream)
	}

	if err != nil {
		log.Printf("Failed to process data: %s\n", err)
		os.Exit(1)
	}

	log.Println("Operation completed successfully.")
}

This is used to convert NaniNovel game save from NSON format to JSON format and verse vesa.
Can be compiled on go version go1.22.4