json_util.cpp

Go to the documentation of this file.

#include "json_util.h"
#include "esphome/core/log.h"
 
// ArduinoJson::Allocator is included via ArduinoJson.h in json_util.h
 
namespace esphome {
namespace json {
 
static const char *const TAG = "json";
 
std::string build_json(const json_build_t &f) {
  // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
  JsonBuilder builder;
  JsonObject root = builder.root();
  f(root);
  return builder.serialize();
  // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
}
 
bool parse_json(const std::string &data, const json_parse_t &f) {
  // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
  JsonDocument doc = parse_json(data);
  if (doc.overflowed() || doc.isNull())
    return false;
  return f(doc.as<JsonObject>());
  // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
}
 
JsonDocument parse_json(const std::string &data) {
  // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
#ifdef USE_PSRAM
  auto doc_allocator = SpiRamAllocator();
  JsonDocument json_document(&doc_allocator);
#else
  JsonDocument json_document;
#endif
  if (json_document.overflowed()) {
    ESP_LOGE(TAG, "Could not allocate memory for JSON document!");
    return JsonObject();  // return unbound object
  }
  DeserializationError err = deserializeJson(json_document, data);
 
  if (err == DeserializationError::Ok) {
    return json_document;
  } else if (err == DeserializationError::NoMemory) {
    ESP_LOGE(TAG, "Can not allocate more memory for deserialization. Consider making source string smaller");
    return JsonObject();  // return unbound object
  }
  ESP_LOGE(TAG, "Parse error: %s", err.c_str());
  return JsonObject();  // return unbound object
  // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
}
 
std::string JsonBuilder::serialize() {
  if (doc_.overflowed()) {
    ESP_LOGE(TAG, "JSON document overflow");
    return "{}";
  }
  std::string output;
  serializeJson(doc_, output);
  return output;
}
 
}  // namespace json
}  // namespace esphome