package main

import (
	"encoding/json"
	"os"
)

func readOrCreateJson(filename string, value any) error {
	f, err := os.Open(filename)
	if err != nil {
		if os.IsNotExist(err) {
			return writeJson(filename, value)
		}

		return err
	}
	defer f.Close()

	if json.NewDecoder(f).Decode(value); err != nil {
		return err
	}

	return nil
}

func writeJson(filename string, value any) error {
	f, err := os.Create(filename)
	if err != nil {
		return err
	}
	defer f.Close()

	enc := json.NewEncoder(f)
	enc.SetIndent("", "    ")
	if err := enc.Encode(value); err != nil {
		return err
	}

	return nil
}