Taobin-Recipe-Manager/server/data/data.go

package data

import (
	"encoding/json"
	"log"
	"os"
	"path/filepath"
	"recipe-manager/models"
	"sort"
)

func readFile(version string) *models.Recipe {
	path := filepath.Join("cofffeemachineConfig", version)
	file, err := os.Open(path)

	if err != nil {
		log.Fatalf("Error when open file: %s", err)
		return nil
	}

	defer file.Close()

	var data *models.Recipe

	err = json.NewDecoder(file).Decode(&data)

	if err != nil {
		log.Fatalf("Error when decode file: %s", err)
		return nil
	}

	return data
}

type Data struct {
	CurrentVersion string
	AllVersions    []string
	recipe         *models.Recipe
}

func NewData() *Data {

	files, err := filepath.Glob("cofffeemachineConfig/coffeethai02_*.json")
	if err != nil {
		log.Panic("Error when scan recipe files:", err)
	}

	sort.Slice(files, func(i, j int) bool {
		file1, err := os.Stat(files[i])

		if err != nil {
			log.Panic("Error when get file info:", err)
		}

		file2, err := os.Stat(files[j])

		if err != nil {
			log.Panic("Error when get file info:", err)
		}

		return file1.ModTime().After(file2.ModTime())
	})

	for i := 0; i < len(files); i++ {
		files[i] = filepath.Base(files[i])
	}

	return &Data{
		CurrentVersion: "coffeethai02_580.json",
		AllVersions:    files,
		recipe:         readFile("coffeethai02_580.json"),
	}
}

func (d *Data) GetRecipe(version string) models.Recipe {

	if version == "" || version == d.CurrentVersion {
		return *d.recipe
	}

	log.Println("Change recipe to version:", version)

	// change current version and read new recipe
	d.CurrentVersion = version
	d.recipe = readFile(version)
	return *d.recipe
}

func (d *Data) GetRecipe01() []models.Recipe01 {
	return d.recipe.Recipe01
}