Parse sync response from server

esp32_device/main/sync_response.c

@@ -0,0 +1,63 @@
+#include "sync_response.h"
+
+#include <stdlib.h>
+#include <esp_log.h>
+
+const static char *TAG = "sync_response";
+
+sync_response *sync_response_parse(cJSON *res)
+{
+    cJSON *relays_json = cJSON_GetObjectItem(res, "relays");
+    if (relays_json == NULL)
+    {
+        ESP_LOGE(TAG, "Missing relays status in sync response!");
+        return NULL;
+    }
+
+    int relays_size = cJSON_GetArraySize(relays_json);
+    sync_response *sync_res = calloc(1, sizeof(sync_response) + relays_size * sizeof(bool));
+
+    if (!sync_res)
+    {
+        ESP_LOGE(TAG, "Failed to allocate memory to store synchronization response!");
+        return NULL;
+    }
+
+    sync_res->len = relays_size;
+
+    for (int i = 0; i < sync_res->len; i++)
+    {
+        sync_res->relays[i] = false;
+
+        cJSON *item = cJSON_GetArrayItem(relays_json, i);
+        assert(item != NULL);
+        cJSON *enabled = cJSON_GetObjectItem(item, "enabled");
+
+        if (enabled == NULL)
+        {
+            ESP_LOGE(TAG, "At least a relay is missing the enabled field. Assuming false.");
+            continue;
+        }
+
+        if (cJSON_IsTrue(enabled))
+        {
+            sync_res->relays[i] = true;
+        }
+    }
+
+    return sync_res;
+}
+
+void sync_response_print(sync_response *res)
+{
+    ESP_LOGI(TAG, " === sync response begin === ");
+    for (size_t i = 0; i < res->len; i++)
+        ESP_LOGI(TAG, "Relay[%d]=%s", i, res->relays[i] ? "ON" : "off");
+    ESP_LOGI(TAG, " === sync response end === ");
+}
+
+void sync_response_free(sync_response *res)
+{
+    if (res != NULL)
+        free(res);
+}