package main

import (
	"encoding/json"
	"os"
)

type storage[T any] struct {
	FileName string
}

func newStorage[T any](filename string) *storage[T] {
	return &storage[T]{FileName: filename}
}

func (s *storage[T]) save(data T) error {
	fileData, err := json.MarshalIndent(data, "", "    ")
	if err != nil {
		return err
	}

	return os.WriteFile(s.FileName, fileData, 0o644)
}

func (s *storage[T]) load(data *T) error {
	fileData, err := os.ReadFile(s.FileName)
	if err != nil {
		return err
	}

	return json.Unmarshal(fileData, data)
}