Writing auth middleware

cmd/web/middleware.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"go-udemy-web-1/internal/helpers"
 	"net/http"
 
 	"github.com/justinas/nosurf"
@@ -34,3 +35,15 @@ func NoSurf(next http.Handler) http.Handler {
 func SessionLoad(next http.Handler) http.Handler {
 	return session.LoadAndSave(next)
 }
+
+func Auth(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if !helpers.IsAuthenticated(r) {
+			session.Put(r.Context(), "error", "Log in first!")
+			http.Redirect(w, r, "/user/login", http.StatusSeeOther)
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	})
+}