include/pahoc/mqtt_async.h

#ifndef MQTT_ASYNC_CLIENT_H_
#define MQTT_ASYNC_CLIENT_H_

#include <MQTTAsync.h>
#include <mutex>
#include "tool/load_protobuf.hpp"
#include "tool/log.hpp"
#include "mqtt_async.pb.h"

class MqttAsyncClient;

typedef int (*MessageArrived)(void *client, char *topicName, int topicLen, MQTTAsync_message *message);

typedef void (*ConnectionLost)(MqttAsyncClient *client, char *cause);

typedef void (*OnSuccess)(MqttAsyncClient *client, MQTTAsync_successData *response);

typedef void (*OnFailure)(MqttAsyncClient *client, MQTTAsync_failureData *response);

class MqttAsyncClient {
protected:
    MqttAsyncClient();

    virtual ~MqttAsyncClient();

public:
    /**
      * @brief   通过json文件初始化配置,请保证配置文件路径及内容正确.
      * @param   path json配置文件路径
      * @return  如果获取到配置文件就会解析配置，配置文件没有则按照默认配置，找不到配置文件则会返回false.
      */
    bool init_from_proto(const std::string &path);

    /**
     * @brief 连接指定地址和id的EMQX服务器
     * @param address EMQX服务器地址，不要带端口
     * @param client_id 注册的客户端id，不同客户端id不要重复
    **/
    bool Connect(const std::string &address, const std::string &client_id);

    /**
     * @brief 断开当前已连接的EMQX服务器
    **/
    bool Disconnect();

    /**
     * @brief 当前mqtt连接状态
    **/
    bool isConnected();

    /**
     * @brief 添加对EMQX服务器指定topic的监听
     * @param topic EMQX服务器topic
     * @param qos 通信模式，默认为1
    **/
    bool Subscribe(const std::string &topic, int qos = 1);

    /**
     * @brief 取消对EMQX服务器指定topic的监听
     * @param topic EMQX服务器topic
     * @param qos 通信模式，默认为1
    **/
    bool unSubscribe(const std::string &topic);

    /**
     * @brief 向EMQX服务器指定的topic发布消息
     * @param topic EMQX服务器topic
     * @param message 发布消息的具体内容
     * @param length 发布消息的长度
     * @param qos 通信模式，默认为1
    **/
    bool SendMessage(const std::string& topic, void *message, int length, int qos = 1);

    /**
     * @brief 设置接收消息的回调函数，当本客户端收到消息时会执行该回调函数，如果未设置则按照默认回调函数执行
     * @param callback 回调函数
    **/
    void setCallback(MessageArrived callback);

    /**
     * @brief 设置连接丢失的回调函数，当本客户端与EMQX服务器连接丢失时会执行该回调函数，如果未设置则按照默认回调函数执行
     * @param callback 回调函数
    **/
    void setCallback(ConnectionLost callback);

    /**
     * @brief 设置指定功能执行成功的回调函数，当本客户端执行某功能成功时会执行该回调函数，如果未设置则按照默认回调函数执行
     * @param callback 回调函数
     * @param function 指定功能，目前有subscribe、send、connect、disconnect
    **/
    bool setCallback(OnSuccess callback, const std::string &function);

    /**
     * @brief 设置指定功能执行失败的回调函数，当本客户端执行某功能失败时会执行该回调函数，如果未设置则按照默认回调函数执行
     * @param callback 回调函数
     * @param function 指定功能，目前有subscribe、send、connect、disconnect
    **/
    bool setCallback(OnFailure callback, const std::string &function);

    /**
     * @brief 获取监听话题的配置
    **/
    google::protobuf::RepeatedPtrField<SubscribeEtc> getSubscribeEtc();

private:
    static int onMessageArrived(void *context, char *topicName, int topicLen, MQTTAsync_message *message);

    static void onMessageLost(void *context, char *cause);

    static void onConnected(void *context, char *cause);

    static void onConnectSuccess(void *context, MQTTAsync_successData *response);

    static void onConnectFailure(void *context, MQTTAsync_failureData *response);

    static void onDisconnectSuccess(void *context, MQTTAsync_successData *response);

    static void onDisconnectFailure(void *context, MQTTAsync_failureData *response);

    static void onSubscribeSuccess(void *context, MQTTAsync_successData *response);

    static void onSubscribeFailure(void *context, MQTTAsync_failureData *response);

    static void onUnSubscribeSuccess(void *context, MQTTAsync_successData *response);

    static void onUnSubscribeFailure(void *context, MQTTAsync_failureData *response);

    static void onSendMessageSuccess(void *context, MQTTAsync_successData *response);

    static void onSendMessageFailure(void *context, MQTTAsync_failureData *response);

public:

protected:
    MqttAsyncConfig *m_etc_;
    MQTTAsync m_client_;
    MQTTAsync_createOptions m_create_opts = MQTTAsync_createOptions_initializer;
    MQTTAsync_connectOptions m_connect_ops = MQTTAsync_connectOptions_initializer;

    MessageArrived m_message_arrived_callback_;
    ConnectionLost m_connect_lost_callback_;
    OnSuccess m_connect_success_;
    OnSuccess m_disconnect_success_;
    OnSuccess m_subscribe_success_;
    OnSuccess m_unsubscribe_success_;
    OnSuccess m_send_success_;
    OnFailure m_connect_failure_;
    OnFailure m_disconnect_failure_;
    OnFailure m_subscribe_failure_;
    OnFailure m_unsubscribe_failure_;
    OnFailure m_send_failure_;

};

#endif