Add admin panel: visit counter, product editor, screenshots upload

internal/handlers/admin.go

@@ -4,18 +4,30 @@ import (
 	"html/template"
 	"log"
 	"net/http"
+	"strconv"
 
 	"shop/internal/auth"
+	"shop/internal/models"
 	"shop/internal/repository"
+	"shop/internal/upload"
 )
 
 type AdminHandler struct {
 	repo      *repository.AdminRepository
 	products  *repository.ProductRepository
+	stats     *repository.StatsRepository
+	storage   *upload.Storage
 	session   *auth.Session
 	templates *template.Template
 }
 
+type adminLayoutData struct {
+	Title   string
+	Email   string
+	Active  string
+	Content template.HTML
+}
+
 type adminLoginData struct {
 	Title string
 	Error string
@@ -26,32 +38,67 @@ type adminDashboardData struct {
 	Title        string
 	Email        string
 	ProductCount int
-	Categories   interface{}
+	CategoryCount int
+	TotalVisits  int64
+	TodayVisits  int
+	Categories   []models.Category
+	Products     []models.Product
+}
+
+type adminProductsData struct {
+	Title    string
+	Email    string
+	Products []models.Product
+}
+
+type adminProductFormData struct {
+	Title   string
+	Email   string
+	Product models.Product
+	IsNew   bool
+	Error   string
 }
 
 func NewAdminHandler(
 	adminRepo *repository.AdminRepository,
 	productRepo *repository.ProductRepository,
+	statsRepo *repository.StatsRepository,
+	storage *upload.Storage,
 	session *auth.Session,
 	templates *template.Template,
 ) *AdminHandler {
 	return &AdminHandler{
 		repo:      adminRepo,
 		products:  productRepo,
+		stats:     statsRepo,
+		storage:   storage,
 		session:   session,
 		templates: templates,
 	}
 }
 
+func (h *AdminHandler) requireAuth(w http.ResponseWriter, r *http.Request) (string, bool) {
+	email, ok := h.session.FromRequest(r)
+	if !ok {
+		http.Redirect(w, r, "/admin/login", http.StatusSeeOther)
+		return "", false
+	}
+	return email, true
+}
+
+func (h *AdminHandler) render(w http.ResponseWriter, name string, data any) {
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	if err := h.templates.ExecuteTemplate(w, name, data); err != nil {
+		log.Printf("render %s: %v", name, err)
+	}
+}
+
 func (h *AdminHandler) LoginPage(w http.ResponseWriter, r *http.Request) {
 	if email, ok := h.session.FromRequest(r); ok && email != "" {
 		http.Redirect(w, r, "/admin/", http.StatusSeeOther)
 		return
 	}
-
-	data := adminLoginData{Title: "Вход в админку"}
-	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-	_ = h.templates.ExecuteTemplate(w, "admin_login.html", data)
+	h.render(w, "admin_login.html", adminLoginData{Title: "Вход в админку"})
 }
 
 func (h *AdminHandler) Login(w http.ResponseWriter, r *http.Request) {
@@ -91,14 +138,13 @@ func (h *AdminHandler) Logout(w http.ResponseWriter, r *http.Request) {
 }
 
 func (h *AdminHandler) Dashboard(w http.ResponseWriter, r *http.Request) {
-	email, ok := h.session.FromRequest(r)
+	email, ok := h.requireAuth(w, r)
 	if !ok {
-		http.Redirect(w, r, "/admin/login", http.StatusSeeOther)
 		return
 	}
 
 	ctx := r.Context()
-	products, err := h.products.Featured(ctx, 100)
+	products, err := h.products.All(ctx)
 	if err != nil {
 		log.Printf("admin products: %v", err)
 		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
@@ -112,24 +158,30 @@ func (h *AdminHandler) Dashboard(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	data := adminDashboardData{
-		Title:        "Админ-панель",
-		Email:        email,
-		ProductCount: len(products),
-		Categories:   categories,
+	stats, err := h.stats.Get(ctx)
+	if err != nil {
+		log.Printf("admin stats: %v", err)
 	}
 
-	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-	_ = h.templates.ExecuteTemplate(w, "admin_dashboard.html", data)
+	h.render(w, "admin_dashboard.html", adminDashboardData{
+		Title:         "Админ-панель",
+		Email:         email,
+		ProductCount:  len(products),
+		CategoryCount: len(categories),
+		TotalVisits:   stats.TotalVisits,
+		TodayVisits:   stats.TodayVisits,
+		Categories:    categories,
+		Products:      products,
+	})
 }
 
 func (h *AdminHandler) renderLoginError(w http.ResponseWriter, email, msg string) {
-	data := adminLoginData{
-		Title: "Вход в админку",
-		Error: msg,
-		Email: email,
-	}
+	data := adminLoginData{Title: "Вход в админку", Error: msg, Email: email}
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
 	w.WriteHeader(http.StatusUnauthorized)
 	_ = h.templates.ExecuteTemplate(w, "admin_login.html", data)
 }
+
+func parseProductID(r *http.Request) (int, error) {
+	return strconv.Atoi(r.PathValue("id"))
+}