Mqtt.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_CLIENT_SOCKETCONTEXT_H
#define IOT_MQTT_CLIENT_SOCKETCONTEXT_H
 
#include "iot/mqtt/Mqtt.h" // IWYU pragma: export
#include "iot/mqtt/Session.h"
 
// IWYU pra gma: no_include "iot/mqtt/ControlPacketDeserializer.h"
 
namespace iot::mqtt {
    class Topic;
 
    namespace packets {
        class Connack;
        class Pingresp;
        class Suback;
        class Unsuback;
 
    } // namespace packets
 
    namespace client::packets {
        class Connack;
        class Pingresp;
        class Publish;
        class Puback;
        class Pubcomp;
        class Pubrec;
        class Pubrel;
        class Suback;
        class Unsuback;
    } // namespace client::packets
} // namespace iot::mqtt
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <cstdint>
#include <list>
#include <string>
 
#endif // DOXYGEN_SHOULD_SKIP_THIS
 
namespace iot::mqtt::client {
 
    class Mqtt : public iot::mqtt::Mqtt {
    public:
        using Super = iot::mqtt::Mqtt;
 
        explicit Mqtt(const std::string& connectionName, const std::string& clientId);
 
        ~Mqtt() override;
 
    private:
        iot::mqtt::ControlPacketDeserializer* createControlPacketDeserializer(iot::mqtt::FixedHeader& fixedHeader) final;
        void deliverPacket(iot::mqtt::ControlPacketDeserializer* controlPacketDeserializer) override;
 
    protected:
        bool onSignal(int sig) override;
 
    private:
        virtual void onConnack(const iot::mqtt::packets::Connack& connack);
        virtual void onSuback(const iot::mqtt::packets::Suback& suback);
        virtual void onUnsuback(const iot::mqtt::packets::Unsuback& unsuback);
        virtual void onPingresp(const iot::mqtt::packets::Pingresp& pingresp);
 
        void _onConnack(const iot::mqtt::client::packets::Connack& connack);
        void _onPublish(const iot::mqtt::client::packets::Publish& publish);
        void _onSuback(const iot::mqtt::client::packets::Suback& suback);
        void _onUnsuback(const iot::mqtt::client::packets::Unsuback& unsuback);
        void _onPingresp(const iot::mqtt::client::packets::Pingresp& pingresp);
 
    public:
        void sendConnect(uint16_t keepAlive,
                         const std::string& clientId,
                         bool cleanSession,
                         const std::string& willTopic,
                         const std::string& willMessage,
                         uint8_t willQoS,
                         bool willRetain,
                         const std::string& username,
                         const std::string& password,
                         bool loopPrevention = false);
        void sendSubscribe(const std::list<Topic>& topics);
        void sendUnsubscribe(const std::list<std::string>& topics);
        void sendPingreq() const;
        void sendDisconnect() const;
 
        friend class iot::mqtt::client::packets::Connack;
        friend class iot::mqtt::client::packets::Suback;
        friend class iot::mqtt::client::packets::Unsuback;
        friend class iot::mqtt::client::packets::Pingresp;
        friend class iot::mqtt::client::packets::Publish;
        friend class iot::mqtt::client::packets::Pubcomp;
        friend class iot::mqtt::client::packets::Pubrec;
        friend class iot::mqtt::client::packets::Puback;
        friend class iot::mqtt::client::packets::Pubrel;
 
    private:
        uint16_t keepAlive = 0;
 
        std::string sessionStoreFileName;
        iot::mqtt::Session session;
 
        core::timer::Timer pingTimer;
    };
 
} // namespace iot::mqtt::client
 
#endif // IOT_MQTT_CLIENT_SOCKETCONTEXT_H