Ещё немного рефакторинга

main.go

@@ -16,6 +16,24 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
+type ImageProvider interface {
+	GetImage() string
+}
+
+type LocalProvider struct{}
+
+type S3Provider struct {
+	confHundler ConfHandler
+}
+
+func (p LocalProvider) GetImage() string {
+	return GetRandImg()
+}
+
+func (p S3Provider) GetImage() string {
+	return p.confHundler.GetRandImgS3()
+}
+
 func GetPicsArray() []string {
 	files, err := os.ReadDir("images")
 	if err != nil {
@@ -37,23 +55,6 @@ func (conf *ConfHandler) GetRandImgS3() string {
 	return picsArray[rand.Intn(len(picsArray))]
 }
 
-func (conf *ConfHandler) ReturnObjectName(w http.ResponseWriter, req *http.Request) {
-	var picFilename io.Reader = strings.NewReader(conf.GetRandImgS3())
-	log.Println("Картинка отдана")
-	io.Copy(w, picFilename)
-}
-
-func (conf *ConfHandler) ReturnHTMLS3(w http.ResponseWriter, req *http.Request) {
-	htmlOpen, err := template.ParseFiles("dist/index.html")
-	if err != nil {
-		log.Println(err.Error())
-		return
-	}
-	image := conf.GetRandImgS3()
-	log.Println(image)
-	htmlOpen.Execute(w, image)
-}
-
 func GetRandImg() string {
 	picsArray := GetPicsArray()
 	if len(picsArray) == 0 {
@@ -62,23 +63,25 @@ func GetRandImg() string {
 	return picsArray[rand.Intn(len(picsArray))]
 }
 
-func ReturnPicFilename(w http.ResponseWriter, req *http.Request) {
-	var picFilename io.Reader = strings.NewReader(GetRandImg())
-	log.Println("Картинка отдана")
-	io.Copy(w, picFilename)
+func ReturnPicFilename(provider ImageProvider) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		image := provider.GetImage()
+		io.Copy(w, strings.NewReader(image))
+		log.Println("Картинка отдана")
+	}
 }
 
-func ReturnHTML(w http.ResponseWriter, req *http.Request) {
-	htmlOpen, err := template.ParseFiles("dist/index.html")
-	if err != nil {
-		log.Println(err.Error())
-		return
-	}
-	image := GetRandImg()
-	log.Println(image)
-	if err := htmlOpen.Execute(w, image); err != nil {
-		log.Printf("Ошибка рендеринга HTML: %v", err)
-		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+func ReturnHTML(provider ImageProvider) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		htmlOpen, err := template.ParseFiles("dist/index.html")
+		if err != nil {
+			log.Println(err.Error())
+			return
+		}
+		image := provider.GetImage()
+		if err := htmlOpen.Execute(w, image); err != nil {
+			log.Printf("Ошибка рендеринга: %v", err)
+		}
 	}
 }
 
@@ -135,11 +138,11 @@ func main() {
 	http.Handle("/images/", http.StripPrefix("/images/", imagesDir))
 	http.Handle("/assets/", http.StripPrefix("/assets/", staticDir))
 
+	var provider ImageProvider
+
 	if !conf.UseS3 {
-		http.HandleFunc("/rand", ReturnPicFilename)
-		http.HandleFunc("/", ReturnHTML)
+		provider = LocalProvider{}
 	} else {
-		var confHandler ConfHandler
 		minioClient, err := minio.New(conf.Address, &minio.Options{
 			Creds:  credentials.NewStaticV4(conf.AccessKey, conf.SecretKey, ""),
 			Secure: true,
@@ -148,11 +151,14 @@ func main() {
 		if err != nil {
 			log.Fatalln(err)
 		}
-		confHandler.minioClient = minioClient
-		confHandler.ConfigHandler = conf
-		http.HandleFunc("/rand", confHandler.ReturnObjectName)
-		http.HandleFunc("/", confHandler.ReturnHTMLS3)
+		provider = S3Provider{
+			confHundler: ConfHandler{
+				ConfigHandler: conf,
+				minioClient:   minioClient,
+			},
+		}
 	}
-
+	http.HandleFunc("/rand", ReturnPicFilename(provider))
+	http.HandleFunc("/", ReturnHTML(provider))
 	http.ListenAndServe(":3666", nil)
 }