update recipe now can select recipe file

server/data/data.go

@@ -4,11 +4,14 @@ import (
 	"encoding/json"
 	"log"
 	"os"
+	"path/filepath"
 	"recipe-manager/models"
+	"sort"
 )
 
-func readFile() *models.Recipe {
-	file, err := os.Open("data/data.json")
+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)
@@ -30,16 +33,56 @@ func readFile() *models.Recipe {
 }
 
 type Data struct {
-	recipe *models.Recipe
+	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{
-		recipe: readFile(),
+		CurrentVersion: "coffeethai02_580.json",
+		AllVersions:    files,
+		recipe:         readFile("coffeethai02_580.json"),
 	}
 }
 
-func (d *Data) GetRecipe() models.Recipe {
+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
 }