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102 lines
2.0 KiB
C++
102 lines
2.0 KiB
C++
#pragma once
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#include "mqtt_message.hpp"
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namespace acl {
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/**
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* mqtt message object for the MQTT_SUBSCRIBE type.
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*/
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class ACL_CPP_API mqtt_subscribe : public mqtt_message {
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public:
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/**
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* constructor for creating MQTT_SUBSCRIBE mqtt message object.
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* @see mqtt_message
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*/
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mqtt_subscribe(void);
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/**
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* constructor for creating MQTT_SUBSCRIBE mqtt message object.
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* @see mqtt_message
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*/
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mqtt_subscribe(const mqtt_header& header);
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~mqtt_subscribe(void);
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/**
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* set message's id
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* @param id {unsigned short} should > 0 && <= 65535
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* @return {mqtt_subscribe&}
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*/
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mqtt_subscribe& set_pkt_id(unsigned short id);
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/**
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* add one topic with its qos.
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* @param topic {const char*} the topic of message.
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* @param qos {mqtt_qos_t} the qos of the topic.
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* @return {mqtt_subscribe&}
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*/
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mqtt_subscribe& add_topic(const char* topic, mqtt_qos_t qos);
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/**
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* get the messsage's id.
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* @return {unsigned short} should return the value that > 0 && <= 65535.
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*/
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unsigned short get_pkt_id(void) const {
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return pkt_id_;
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}
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/**
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* get all the topics.
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* @return {const std::vector<string>&}
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*/
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const std::vector<string>& get_topics(void) const {
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return topics_;
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}
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/**
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* get all the qoses of all topics.
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* @return {const std::vector<mqtt_qos_t>&}
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*/
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const std::vector<mqtt_qos_t>& get_qoses(void) const {
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return qoses_;
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}
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protected:
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// @override
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bool to_string(string& out);
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// @override
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int update(const char* data, int dlen);
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// @override
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bool finished(void) const {
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return finished_;
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}
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public:
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// used internal to parse mqtt message in streawming mode.
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int update_header_var(const char* data, int dlen);
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int update_topic_len(const char* data, int dlen);
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int update_topic_val(const char* data, int dlen);
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int update_topic_qos(const char* data, int dlen);
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private:
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unsigned status_;
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bool finished_;
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char buff_[2];
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unsigned dlen_;
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unsigned short pkt_id_;
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std::vector<string> topics_;
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std::vector<mqtt_qos_t> qoses_;
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unsigned body_len_;
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unsigned nread_;
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string topic_;
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};
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} // namespace acl
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