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#pragma once
#include "async_resp.hpp"
#include "sub_request.hpp"
#include <nlohmann/json.hpp>
#include <functional>
#include <memory>
#include <stdexcept>
#include <string>
#include <string_view>
#include <type_traits>
#include <vector>
namespace redfish
{
class OemBaseRule
{
public:
explicit OemBaseRule(std::string_view thisRule) : rule(thisRule) {}
virtual ~OemBaseRule() = default;
OemBaseRule(const OemBaseRule&) = delete;
OemBaseRule(OemBaseRule&&) = delete;
OemBaseRule& operator=(const OemBaseRule&) = delete;
OemBaseRule& operator=(const OemBaseRule&&) = delete;
virtual void handle(const SubRequest& req,
const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
const std::vector<std::string>& params) = 0;
std::string rule;
};
template <typename... Args>
class OemRule : public OemBaseRule
{
public:
using self_t = OemRule<Args...>;
explicit OemRule(std::string_view ruleIn) : OemBaseRule(ruleIn) {}
void validate()
{
if (!handler)
{
throw std::runtime_error(
"no OEM fragment handler for the rule {}" + rule);
}
}
template <typename Func>
void operator()(Func&& f)
{
static_assert(
std::is_invocable_v<Func, SubRequest,
std::shared_ptr<bmcweb::AsyncResp>&, Args...>,
"Handler type is mismatched with URL parameters");
static_assert(
std::is_same_v<
void, std::invoke_result_t<Func, SubRequest,
std::shared_ptr<bmcweb::AsyncResp>&,
Args...>>,
"Handler function with response argument should have void return type");
handler = std::forward<Func>(f);
}
void handle(const SubRequest& req,
const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
const std::vector<std::string>& params) override
{
if constexpr (sizeof...(Args) == 0)
{
handler(req, asyncResp);
}
else if constexpr (sizeof...(Args) == 1)
{
handler(req, asyncResp, params[0]);
}
else if constexpr (sizeof...(Args) == 2)
{
handler(req, asyncResp, params[0], params[1]);
}
else if constexpr (sizeof...(Args) == 3)
{
handler(req, asyncResp, params[0], params[1], params[2]);
}
else if constexpr (sizeof...(Args) == 4)
{
handler(req, asyncResp, params[0], params[1], params[2], params[3]);
}
else if constexpr (sizeof...(Args) == 5)
{
handler(req, asyncResp, params[0], params[1], params[2], params[3],
params[4]);
}
static_assert(sizeof...(Args) <= 5, "More args than are supported");
}
private:
std::function<void(const SubRequest&,
const std::shared_ptr<bmcweb::AsyncResp>&, Args...)>
handler;
};
} // namespace redfish
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