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/*
* SubscriptionRegistryProxy.h, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#pragma once
#include <vcmi/events/Event.h>
#include <vcmi/events/EventBus.h>
#include <vcmi/events/SubscriptionRegistry.h>
#include "../../LuaWrapper.h"
#include "../../LuaStack.h"
#include "../../LuaReference.h"
VCMI_LIB_NAMESPACE_BEGIN
namespace scripting
{
namespace api
{
namespace events
{
class EventSubscriptionProxy : public UniqueOpaqueWrapper<::events::EventSubscription, EventSubscriptionProxy>
{
public:
using Wrapper = UniqueOpaqueWrapper<::events::EventSubscription, EventSubscriptionProxy>;
static const std::vector<typename Wrapper::CustomRegType> REGISTER_CUSTOM;
};
template <typename EventProxy>
class SubscriptionRegistryProxy
{
public:
using EventType = typename EventProxy::ObjectType;
using RegistryType = ::events::SubscriptionRegistry<EventType>;
static_assert(std::is_base_of<::events::Event, EventType>::value, "Invalid template parameter");
static int subscribeBefore(lua_State * L)
{
LuaStack S(L);
// subscription = subscribeBefore(eventBus, callback)
//TODO: use capture by move from c++14
auto callbackRef = std::make_shared<LuaReference>(L);
::events::EventBus * eventBus = nullptr;
if(!S.tryGet(1, eventBus))
{
S.push("No event bus");
return 1;
}
S.clear();
RegistryType * registry = EventType::getRegistry();
typename EventType::PreHandler callback = [=](EventType & event)
{
LuaStack S(L);
callbackRef->push();
S.push(&event);
if(lua_pcall(L, 1, 0, 0) != 0)
{
std::string msg;
S.tryGet(1, msg);
logMod->error("Script callback error: %s", msg);
}
S.clear();
};
std::unique_ptr<::events::EventSubscription> subscription = registry->subscribeBefore(eventBus, std::move(callback));
S.push(std::move(subscription));
return 1;
}
static int subscribeAfter(lua_State * L)
{
LuaStack S(L);
//TODO: use capture by move from c++14
auto callbackRef = std::make_shared<LuaReference>(L);
::events::EventBus * eventBus = nullptr;
if(!S.tryGet(1, eventBus))
{
S.push("No event bus");
return 1;
}
S.clear();
RegistryType * registry = EventType::getRegistry();
typename EventType::PostHandler callback = [=](const EventType & event)
{
LuaStack S(L);
callbackRef->push();
S.push(const_cast<EventType *>(&event)); //FIXME:
if(lua_pcall(L, 1, 0, 0) != 0)
{
std::string msg;
S.tryGet(1, msg);
logMod->error("Script callback error: %s", msg);
}
S.clear();
};
std::unique_ptr<::events::EventSubscription> subscription = registry->subscribeAfter(eventBus, std::move(callback));
S.push(std::move(subscription));
return 1;
}
};
}
}
}
VCMI_LIB_NAMESPACE_END
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