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Add MQTT subscriptions for display and remote commands.

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This commit is contained in:
Jonathan Naylor
2023-06-19 17:16:14 +01:00
parent ff004211b9
commit 0615a4218d
4 changed files with 162 additions and 89 deletions
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53
MQTTConnection.cpp
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@@ -23,10 +23,11 @@
#include <cstring>
CMQTTConnection::CMQTTConnection(const std::string& host, unsigned short port, const std::string& name, unsigned int keepalive, MQTT_QOS qos) :
CMQTTConnection::CMQTTConnection(const std::string& host, unsigned short port, const std::string& name, const std::vector<std::pair<std::string, void (*)(const std::string&)>>& subs, unsigned int keepalive, MQTT_QOS qos) :
m_host(host),
m_port(port),
m_name(name),
m_subs(subs),
m_keepalive(keepalive),
m_qos(qos),
m_mosq(NULL),
@@ -54,6 +55,8 @@ bool CMQTTConnection::open()
}
::mosquitto_connect_callback_set(m_mosq, onConnect);
::mosquitto_subscribe_callback_set(m_mosq, onSubscribe);
::mosquitto_message_callback_set(m_mosq, onMessage);
::mosquitto_disconnect_callback_set(m_mosq, onDisconnect);
int rc = ::mosquitto_connect(m_mosq, m_host.c_str(), m_port, m_keepalive);
@@ -111,9 +114,57 @@ void CMQTTConnection::onConnect(mosquitto* mosq, void* obj, int rc)
assert(obj != NULL);
::fprintf(stdout, "MQTT: on_connect: %s\n", ::mosquitto_connack_string(rc));
if (rc != 0) {
::mosquitto_disconnect(mosq);
return;
}
CMQTTConnection* p = static_cast<CMQTTConnection*>(obj);
p->m_connected = true;
for (std::vector<std::pair<std::string, void (*)(const std::string&)>>::const_iterator it = p->m_subs.cbegin(); it != p->m_subs.cend(); ++it) {
std::string topic = (*it).first;
char topicEx[100U];
::sprintf(topicEx, "%s/%s", p->m_name.c_str(), topic.c_str());
rc = ::mosquitto_subscribe(mosq, NULL, topicEx, MQTT_QOS_AT_LEAST_ONCE);
if (rc != MOSQ_ERR_SUCCESS) {
::fprintf(stderr, "MQTT: error subscribing to %s - %s\n", topicEx, ::mosquitto_strerror(rc));
::mosquitto_disconnect(mosq);
}
}
}
void CMQTTConnection::onSubscribe(mosquitto* mosq, void* obj, int mid, int qosCount, const int* grantedQOS)
{
assert(mosq != NULL);
assert(obj != NULL);
assert(grantedQOS != NULL);
for (int i = 0; i < qosCount; i++)
::fprintf(stdout, "MQTT: on_subscribe: %d:%d\n", i, grantedQOS[i]);
}
void CMQTTConnection::onMessage(mosquitto* mosq, void* obj, const mosquitto_message* message)
{
assert(mosq != NULL);
assert(obj != NULL);
assert(message != NULL);
CMQTTConnection* p = static_cast<CMQTTConnection*>(obj);
for (std::vector<std::pair<std::string, void (*)(const std::string&)>>::const_iterator it = p->m_subs.cbegin(); it != p->m_subs.cend(); ++it) {
std::string topic = (*it).first;
char topicEx[100U];
::sprintf(topicEx, "%s/%s", p->m_name.c_str(), topic.c_str());
if (::strcmp(topicEx, message->topic) == 0) {
(*it).second(std::string((char*)message->payload, message->payloadlen));
break;
}
}
}
void CMQTTConnection::onDisconnect(mosquitto* mosq, void* obj, int rc)