feat: initpage com sync Go + auth + frontend em web/

internal/middleware/auth.go

@@ -0,0 +1,45 @@
+package middleware
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/alexedwards/scs/v2"
+)
+
+type ctxKey string
+
+const UserIDKey ctxKey = "user_id"
+
+func AuthRequired(sm *scs.SessionManager) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if !sm.Exists(r.Context(), "user_id") {
+				w.WriteHeader(http.StatusUnauthorized)
+				w.Write([]byte(`{"error":"não autenticado"}`))
+				return
+			}
+			next.ServeHTTP(w, r)
+		})
+	}
+}
+
+func LoadUserID(sm *scs.SessionManager) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			uid, ok := sm.Get(r.Context(), "user_id").(string)
+			if ok {
+				r = r.WithContext(context.WithValue(r.Context(), UserIDKey, uid))
+			}
+			next.ServeHTTP(w, r)
+		})
+	}
+}
+
+func GetUserID(ctx context.Context) string {
+	v := ctx.Value(UserIDKey)
+	if s, ok := v.(string); ok {
+		return s
+	}
+	return ""
+}