public function categories($id = null)
{
if ($_SERVER['REQUEST_METHOD'] == "DELETE") {
return Category_Model::DeleteCategory($id);
}
if ($_SERVER['REQUEST_METHOD'] == "POST") {
$data = json_decode(file_get_contents("php://input"), true);
return Category_Model::CreateCategory($data);
}
if ($_SERVER['REQUEST_METHOD'] == "PUT") {
$data = json_decode(file_get_contents("php://input"), true);
return Category_Model::UpdateCategory($data, $id);
}
if (isset($id)) {
return Category_Model::GetCategoryById($id);
}
return Category_Model::GetCategories();
}