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/*
* Copyright (C) 2019 Belle-Isle, Andrew <drumsetmonkey@gmail.com>
* Author: Belle-Isle, Andrew <drumsetmonkey@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SCRIPT_HPP_
#define SCRIPT_HPP_
#include <entityx/entityx.h>
#include <lua.hpp>
#include <sol/sol.hpp>
/****************
* COMPONENTS *
****************/
#include <components/Position.hpp>
struct EntitySpawnEvent {
EntitySpawnEvent (sol::object ref)
: ref(ref) {}
sol::object ref;
};
/**
* @class ScriptSystem
* Handles all the game's scripting requests
*/
class ScriptSystem : public entityx::System<ScriptSystem>
, public entityx::Receiver<ScriptSystem>
{
private:
/**
* The script systems internal lua state that handles all
* interactions between C and Lua
*/
entityx::EventManager events;
entityx::EntityManager manager;
sol::state lua;
public:
ScriptSystem(void)
: manager(events){}
~ScriptSystem(void)
{
}
int init(void)
{
lua.open_libraries(sol::lib::base);
scriptExport();
doFile();
//Script::CreateNewState();
return 0;
}
void configure([[maybe_unused]]entityx::EntityManager& entities,
[[maybe_unused]]entityx::EventManager& events) final
{
//manager = std::make_shared<entityx::EntityManager>(std::move(entities));
events.subscribe<EntitySpawnEvent>(*this);
init();
}
void update([[maybe_unused]] entityx::EntityManager& entites,
[[maybe_unused]] entityx::EventManager& events,
[[maybe_unused]] entityx::TimeDelta dt) final
{
}
void doFile(void)
{
auto result = lua.script_file("Scripts/init.lua");
if (!result.valid()) {
std::cout << "Lua error: " << std::endl;
}
manager.each<Position>(
[&](entityx::Entity, Position& p)
{std::cout << p.x << "," << p.y << std::endl;});
}
sol::table spawn([[maybe_unused]]sol::object param)
{
sol::table toRet = lua.create_table_with();
//lb::LuaRef entity(state.get());
//entity = lb::newTable(state.get());
if (param.get_type() == sol::type::table) {
sol::table tab = param;
entityx::Entity e = manager.create();
if (tab["Position"] != nullptr) {
toRet["Position"] =
e.assign<Position>(Position().FromLua(tab["Position"])).get();
}
if (tab["init"] != nullptr) {
toRet["init"] = tab["init"];
}
} else {
std::cerr << "Parameter to spawn() must be a table!" << std::endl;
}
//return entity;
return toRet;
}
void scriptExport()
{
std::function<sol::table(sol::table)> func =
[this](sol::table t){ return spawn(t);};
lua.new_usertype<Position>("Position",
sol::constructors<Position(float x, float y), Position()>(),
"x", &Position::x,
"y", &Position::y);
auto gamespace = lua["game"].get_or_create<sol::table>();
gamespace.set_function("spawn", func);
}
void receive (const EntitySpawnEvent &toSpawn)
{
//toSpawn.ret = spawn(toSpawn.ref);
(void)toSpawn;
}
};
#endif//SCRIPT_HPP_
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