C_commandHandler.hpp

/*
 * Copyright 2026 Guillaume Guillet
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef _FGE_C_COMMANDHANDLER_HPP_INCLUDED
#define _FGE_C_COMMANDHANDLER_HPP_INCLUDED
 
#include "FastEngine/fge_extern.hpp"
#include "FastEngine/C_callback.hpp"
#include "FastEngine/C_property.hpp"
#include <string>
#include <unordered_map>
#include <vector>
 
#define FGE_COMMAND_DEFAULT_RESERVE_SIZE 16
 
namespace fge
{
 
class CommandHandler;
class Scene;
class Object;
 
using CommandFunction = fge::CalleeUniquePtr<fge::Property, fge::Object*, fge::Property const&, fge::Scene*>;
using CommandStaticHelpers =
        fge::CallbackStaticHelpers<fge::Property, CommandFunction, fge::Object*, fge::Property const&, fge::Scene*>;

class FGE_API CommandHandler
{
public:
    struct CommandData
    {
        inline CommandData(fge::CommandFunction cmdfunc, std::string_view name) :
                _func(std::move(cmdfunc)),
                _name(name)
        {}
 
        fge::CommandFunction _func;
        std::string _name;
    };
 
    using CommandDataType = std::vector<CommandData>;
 
    CommandHandler();
    CommandHandler(CommandHandler const& r) = delete;
    CommandHandler(CommandHandler&& r) noexcept = delete;
 
    CommandHandler& operator=(CommandHandler const& r) = delete;
    CommandHandler& operator=(CommandHandler&& r) noexcept = delete;

    bool addCmd(std::string_view name, fge::CommandFunction cmdfunc);
    void delCmd(std::string_view name);
    bool replaceCmd(std::string_view name, fge::CommandFunction cmdfunc);

    void clearCmd();

    fge::Property
    callCmd(std::string_view name, fge::Object* caller, fge::Property const& arg, fge::Scene* callerScene);
    fge::Property callCmd(std::size_t index, fge::Object* caller, fge::Property const& arg, fge::Scene* callerScene);

    [[nodiscard]] std::size_t getCmdIndex(std::string_view name) const;
    [[nodiscard]] std::string_view getCmdName(std::size_t index) const;

    [[nodiscard]] CommandData const* getCmd(std::string_view name) const;

    [[nodiscard]] std::size_t getCmdSize() const;

    [[nodiscard]] CommandDataType const& getCmdList() const;
 
private:
    CommandDataType g_cmdData;
    std::unordered_map<std::string_view, std::size_t> g_cmdDataMap;
};
 
} // namespace fge
 
#endif // _FGE_C_COMMANDHANDLER_HPP_INCLUDED