MqttContext.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 IOT_MQTT_MQTTCONTEXT_H
#define IOT_MQTT_MQTTCONTEXT_H
 
namespace core::socket::stream {
    class SocketConnection;
}
 
namespace iot::mqtt {
    class Mqtt;
}
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <cstddef>
 
#endif // DOXYGEN_SHOULD_SKIP_THIS
 
namespace iot::mqtt {
 
    class MqttContext {
    public:
        explicit MqttContext(Mqtt* mqtt);
        MqttContext(const MqttContext&) = default;
 
        MqttContext& operator=(const MqttContext&) = default;
 
        virtual ~MqttContext();
 
        virtual std::size_t recv(char* chunk, std::size_t chunklen) = 0;
        virtual void send(const char* chunk, std::size_t chunklen) = 0;
 
        virtual core::socket::stream::SocketConnection* getSocketConnection() const = 0;
 
        virtual void end(bool fatal = false) = 0;
        virtual void close() = 0;
 
        void onConnected();
        std::size_t onReceivedFromPeer();
        void onDisconnected();
        bool onSignal(int sig);
 
    protected:
        Mqtt* mqtt;
    };
 
} // namespace iot::mqtt
 
#endif // IOT_MQTT_MQTTCONTEXT_H