IoT_Error_t subscribeToShadowActionAcks(const char *pThingName, ShadowActions_t action, bool isSticky) {
IoT_Error_t ret_val = SUCCESS;
bool clearBothEntriesFromList = true;
int16_t indexAcceptedSubList = 0;
int16_t indexRejectedSubList = 0;
Timer subSettlingtimer;
indexAcceptedSubList = getNextFreeIndexOfSubscriptionList();
indexRejectedSubList = getNextFreeIndexOfSubscriptionList();
if(indexAcceptedSubList >= 0 && indexRejectedSubList >= 0) {
topicNameFromThingAndAction(SubscriptionList[indexAcceptedSubList].Topic, pThingName, action, SHADOW_ACCEPTED);
ret_val = aws_iot_mqtt_subscribe(pMqttClient, SubscriptionList[indexAcceptedSubList].Topic,
(uint16_t) strlen(SubscriptionList[indexAcceptedSubList].Topic), QOS0,
AckStatusCallback, NULL);
if(ret_val == SUCCESS) {
SubscriptionList[indexAcceptedSubList].count = 1;
SubscriptionList[indexAcceptedSubList].isSticky = isSticky;
topicNameFromThingAndAction(SubscriptionList[indexRejectedSubList].Topic, pThingName, action,
SHADOW_REJECTED);
ret_val = aws_iot_mqtt_subscribe(pMqttClient, SubscriptionList[indexRejectedSubList].Topic,
(uint16_t) strlen(SubscriptionList[indexRejectedSubList].Topic), QOS0,
AckStatusCallback, NULL);
if(ret_val == SUCCESS) {
SubscriptionList[indexRejectedSubList].count = 1;
SubscriptionList[indexRejectedSubList].isSticky = isSticky;
clearBothEntriesFromList = false;
// wait for SUBSCRIBE_SETTLING_TIME seconds to let the subscription take effect
init_timer(&subSettlingtimer);
countdown_sec(&subSettlingtimer, SUBSCRIBE_SETTLING_TIME);
while(!has_timer_expired(&subSettlingtimer));
}
}
}
if(clearBothEntriesFromList) {
if(indexAcceptedSubList >= 0) {
SubscriptionList[indexAcceptedSubList].isFree = true;
} else if(indexRejectedSubList >= 0) {
SubscriptionList[indexRejectedSubList].isFree = true;
}
if(SubscriptionList[indexAcceptedSubList].count == 1) {
aws_iot_mqtt_unsubscribe(pMqttClient, SubscriptionList[indexAcceptedSubList].Topic,
(uint16_t) strlen(SubscriptionList[indexAcceptedSubList].Topic));
}
}
return ret_val;
}
IoT_Error_t subscribeToShadowActionAcks(const char *pThingName, ShadowActions_t action, bool isSticky) {
IoT_Error_t ret_val = NONE_ERROR;
MQTTSubscribeParams subParams = MQTTSubscribeParamsDefault;
bool clearBothEntriesFromList = true;
int16_t indexAcceptedSubList = 0;
int16_t indexRejectedSubList = 0;
indexAcceptedSubList = getNextFreeIndexOfSubscriptionList();
indexRejectedSubList = getNextFreeIndexOfSubscriptionList();
if (indexAcceptedSubList >= 0 && indexRejectedSubList >= 0) {
topicNameFromThingAndAction(SubscriptionList[indexAcceptedSubList].Topic, pThingName, action, SHADOW_ACCEPTED);
subParams.mHandler = AckStatusCallback;
subParams.qos = QOS_0;
subParams.pTopic = SubscriptionList[indexAcceptedSubList].Topic;
ret_val = pMqttClient->subscribe(&subParams);
if (ret_val == NONE_ERROR) {
SubscriptionList[indexAcceptedSubList].count = 1;
SubscriptionList[indexAcceptedSubList].isSticky = isSticky;
topicNameFromThingAndAction(SubscriptionList[indexRejectedSubList].Topic, pThingName, action,
SHADOW_REJECTED);
subParams.pTopic = SubscriptionList[indexRejectedSubList].Topic;
ret_val = pMqttClient->subscribe(&subParams);
if (ret_val == NONE_ERROR) {
SubscriptionList[indexRejectedSubList].count = 1;
SubscriptionList[indexRejectedSubList].isSticky = isSticky;
clearBothEntriesFromList = false;
// wait for SUBSCRIBE_SETTLING_TIME seconds to let the subscription take effect
Timer subSettlingtimer;
InitTimer(&subSettlingtimer);
countdown(&subSettlingtimer, SUBSCRIBE_SETTLING_TIME);
while(!expired(&subSettlingtimer));
}
}
}
if (clearBothEntriesFromList) {
if (indexAcceptedSubList >= 0) {
SubscriptionList[indexAcceptedSubList].isFree = true;
} else if (indexRejectedSubList >= 0) {
SubscriptionList[indexRejectedSubList].isFree = true;
}
if (SubscriptionList[indexAcceptedSubList].count == 1) {
ret_val = pMqttClient->unsubscribe(SubscriptionList[indexAcceptedSubList].Topic);
}
}
return ret_val;
}
