publisher.hpp

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/*
 * Copyright (C) 2023  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code 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.
 *
 * Antkeeper source code 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 Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef ANTKEEPER_EVENT_PUBLISHER_HPP
#define ANTKEEPER_EVENT_PUBLISHER_HPP
 
#include <algorithm>
#include <execution>
#include <engine/event/channel.hpp>
 
namespace event {
 
template <class T>
class publisher
{
public:
    typedef T message_type;
    
    typedef channel<message_type> channel_type;
    
    template <class ExecutionPolicy>
    void publish(ExecutionPolicy&& policy, const message_type& message) const
    {
        std::for_each
        (
            policy,
            std::begin(m_channel.subscribers),
            std::end(m_channel.subscribers),
            [&](const auto& subscriber)
            {
                (*subscriber)(message);
            }
        );
    }
    
    void publish(const message_type& message) const
    {
        publish(std::execution::seq, message);
    }
    
    [[nodiscard]] inline const channel_type& channel() const noexcept
    {
        return m_channel;
    }
    
    [[nodiscard]] inline channel_type& channel() noexcept
    {
        return m_channel;
    }
    
private:
    channel_type m_channel;
};
 
} // namespace event
 
#endif // ANTKEEPER_EVENT_PUBLISHER_HPP