SocketConnector.h

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/*
 * SNode.C - a slim toolkit for network communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef CORE_SOCKET_STREAM_SOCKETCONNECTOR_H
#define CORE_SOCKET_STREAM_SOCKETCONNECTOR_H
 
#include "core/eventreceiver/ConnectEventReceiver.h"
#include "core/socket/State.h"
 
namespace core::socket::stream {
    class SocketContextFactory;
}
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <functional>
#include <memory>
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
namespace core::socket::stream {
 
    template <typename PhysicalSocketClientT, typename ConfigT, template <typename PhysicalSocketClient> typename SocketConnectionT>
    class SocketConnector : protected core::eventreceiver::ConnectEventReceiver {
    private:
        using PhysicalClientSocket = PhysicalSocketClientT;
 
    protected:
        using Config = ConfigT;
        using SocketAddress = typename PhysicalClientSocket::SocketAddress;
        using SocketConnection = SocketConnectionT<PhysicalClientSocket>;
 
    public:
        SocketConnector(const std::shared_ptr<core::socket::stream::SocketContextFactory>& socketContextFactory,
                        const std::function<void(SocketConnection*)>& onConnect,
                        const std::function<void(SocketConnection*)>& onConnected,
                        const std::function<void(SocketConnection*)>& onDisconnect,
                        const std::function<void(const SocketAddress&, core::socket::State)>& onStatus,
                        const std::shared_ptr<Config>& config);
 
        SocketConnector(const SocketConnector& socketConnector);
 
        ~SocketConnector() override;
 
    protected:
        virtual void useNextSocketAddress() = 0;
 
        virtual void init();
 
    private:
        void connectEvent() final;
 
        void unobservedEvent() final;
        void connectTimeout() final;
 
    protected:
        void destruct() final;
 
    private:
        PhysicalClientSocket physicalClientSocket;
        SocketAddress remoteAddress;
 
    protected:
        std::shared_ptr<core::socket::stream::SocketContextFactory> socketContextFactory = nullptr;
 
        std::function<void(SocketConnection*)> onConnect;
        std::function<void(SocketConnection*)> onConnected;
        std::function<void(SocketConnection*)> onDisconnect;
 
        std::function<void(const SocketAddress&, core::socket::State)> onStatus;
 
        std::shared_ptr<Config> config = nullptr;
    };
 
} // namespace core::socket::stream
 
#endif // CORE_SOCKET_STREAM_SOCKETCONNECTOR_H