private function parseForm(HTTPRequest $request, Category $category)
 {
     $name = htmlspecialchars($request->postData('name'));
     $description = htmlspecialchars($request->postData('description'));
     $isRoot = !$request->postExists('parent-category');
     $category->setName($name);
     $category->setIsRoot($isRoot);
     $category->setDescription($description);
     if (!$isRoot) {
         $parentCategoryId = $request->postData('parent-category');
         $category->setParentCategoryId($parentCategoryId);
     }
 }