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Reworked storage for JSON generation

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This commit is contained in:
Indu Prakash
2022-10-04 19:36:13 -05:00
parent 91f1c66782
commit 684a175a3c
3 changed files with 64 additions and 61 deletions
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76
src/httpserver/hass.c
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@@ -1,6 +1,7 @@
#include "hass.h"
#include "../new_common.h"
#include "../new_cfg.h"
#include "../logging/logging.h"
/* Sample Hass Discovery JSON
{
@@ -21,44 +22,48 @@
}
*/
/// @brief Returns HomeAssistant unique id for the entity. The caller needs to free the returned pointer.
/// @brief Populates HomeAssistant unique id for the entity.
/// @param type Entity type
/// @param index Entity index
/// @return
char *hass_build_unique_id(ENTITY_TYPE type, int index){
//https://developers.home-assistant.io/docs/entity_registry_index/#unique-id-requirements mentions that mac can be used for
//unique_id and I think that longDeviceName should contain that e.g. longDeviceName_relay_1
/// @param uniq_id Array to populate (should be of size HASS_UNIQUE_ID_SIZE)
void hass_populate_unique_id(ENTITY_TYPE type, int index, char *uniq_id){
//https://developers.home-assistant.io/docs/entity_registry_index/#unique-id-requirements
//mentions that mac can be used for unique_id and deviceName contains that.
const char *longDeviceName = CFG_GetDeviceName();
//Entity type is `relay` or `light` - 5 char
char *uniq_id = (char *)os_malloc(strlen(longDeviceName) + 1 + 5 + 1 + 4); //4 for index and nul char
if (type == ENTITY_LIGHT){
sprintf(uniq_id,"%s_%s_%d", longDeviceName, "light", index);
}
else{
sprintf(uniq_id,"%s_%s_%d", longDeviceName, "relay", index);
}
return uniq_id;
}
/// @brief Returns HomeAssistant device configuration MQTT channel e.g. switch/enbrighten_9de8f9_relay_0/config. The caller needs to free the returned pointer.
/// @brief Prints HomeAssistant unique id for the entity.
/// @param request
/// @param fmt
/// @param type Entity type
/// @param index Entity index
void hass_print_unique_id(http_request_t *request, const char *fmt, ENTITY_TYPE type, int index){
char uniq_id[HASS_UNIQUE_ID_SIZE];
hass_populate_unique_id(type, index, uniq_id);
hprintf128(request, fmt, uniq_id);
}
/// @brief Populates HomeAssistant device configuration MQTT channel e.g. switch/enbrighten_9de8f9_relay_0/config.
/// @param type Entity type
/// @param uniq_id Entity unique id
/// @return
char *hass_get_device_config_channel(ENTITY_TYPE type, char *uniq_id){
//device_type is `switch` or `light` - 6 char
char *channel = (char *)os_malloc(6 + 1 + strlen(uniq_id) + 7 + 1);
/// @param info Device info
void hass_populate_device_config_channel(ENTITY_TYPE type, char *uniq_id, HassDeviceInfo *info){
//device_type is `switch` or `light`
if (type == ENTITY_LIGHT){
sprintf(channel, "light/%s/config", uniq_id);
sprintf(info->channel, "light/%s/config", uniq_id);
}
else{
sprintf(channel, "switch/%s/config", uniq_id);
sprintf(info->channel, "switch/%s/config", uniq_id);
}
return channel;
}
/// @brief Builds HomeAssistant device discovery info. The caller needs to free the returned pointer.
@@ -85,7 +90,9 @@ cJSON *hass_build_device_node(cJSON *ids) {
/// @param payload_off
void hass_populate_common(cJSON *root, int index, char *unique_id, char *payload_on, char *payload_off){
const char *clientId = CFG_GetMQTTClientId();
char tmp[64]; //CFG_GetShortDeviceName is 32 char max so 64 would be enough
//We are stuffing CFG_GetShortDeviceName and clientId into tmp so it needs to be bigger than them
char tmp[MAX(CGF_MQTT_CLIENT_ID_SIZE, CGF_SHORT_DEVICE_NAME_SIZE) + 16];
//Using abbreviated node names as per https://www.home-assistant.io/docs/mqtt/discovery/
sprintf(tmp,"%s %i",CFG_GetShortDeviceName(),index);
@@ -100,8 +107,8 @@ void hass_populate_common(cJSON *root, int index, char *unique_id, char *payload
sprintf(tmp,"%s/connected",clientId);
cJSON_AddStringToObject(root, "avty_t", tmp); //availability_topic
cJSON_AddStringToObject(root, "pl_on", "1"); //payload_on
cJSON_AddStringToObject(root, "pl_off", "0"); //payload_off
cJSON_AddStringToObject(root, "pl_on", payload_on); //payload_on
cJSON_AddStringToObject(root, "pl_off", payload_off); //payload_off
cJSON_AddStringToObject(root, "uniq_id", unique_id); //unique_id
}
@@ -113,19 +120,23 @@ void hass_populate_common(cJSON *root, int index, char *unique_id, char *payload
/// @return
HassDeviceInfo *hass_init_device_info(ENTITY_TYPE type, int index, char *payload_on, char *payload_off){
HassDeviceInfo *info = os_malloc(sizeof(HassDeviceInfo));
info->unique_id = hass_build_unique_id(type, index);
info->channel = hass_get_device_config_channel(type, info->unique_id);
addLogAdv(LOG_INFO, LOG_FEATURE_HASS, "hass_init_device_info=%p", info);
hass_populate_unique_id(type, index, info->unique_id);
addLogAdv(LOG_DEBUG, LOG_FEATURE_HASS, "unique_id=%s", info->unique_id);
hass_populate_device_config_channel(type, info->unique_id, info);
info->ids = cJSON_CreateArray();
cJSON_AddItemToArray(info->ids, cJSON_CreateString(CFG_GetDeviceName()));
info->device = hass_build_device_node(info->ids);
info->root = cJSON_CreateObject();
cJSON_AddItemToObject(info->root, "dev", info->device); //device
hass_populate_common(info->root, index, info->unique_id, payload_on, payload_off);
addLogAdv(LOG_DEBUG, LOG_FEATURE_HASS, "root=%p", info->root);
return info;
}
@@ -133,7 +144,7 @@ HassDeviceInfo *hass_init_device_info(ENTITY_TYPE type, int index, char *payload
/// @param info
/// @return
char *hass_build_discovery_json(HassDeviceInfo *info){
info->json = cJSON_PrintUnformatted(info->root);
cJSON_PrintPreallocated(info->root, info->json, HASS_JSON_SIZE, 0);
return info->json;
}
@@ -141,14 +152,11 @@ char *hass_build_discovery_json(HassDeviceInfo *info){
/// @param info
void hass_free_device_info(HassDeviceInfo *info){
if (info == NULL) return;
os_free(info->unique_id);
os_free(info->channel);
os_free(info->json);
addLogAdv(LOG_DEBUG, LOG_FEATURE_HASS, "hass_free_device_info \r\n");
cJSON_Delete(info->root);
cJSON_Delete(info->device);
cJSON_Delete(info->ids);
if (info->root != NULL){
cJSON_Delete(info->root);
}
os_free(info);
}