json_helpers.hpp

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// SPDX-FileCopyrightText: 2025 VTT Technical Research Centre of Finland Ltd
// SPDX-License-Identifier: AGPL-3.0-or-later
 
#ifndef PFC_UI_JSON_HELPERS_HPP
#define PFC_UI_JSON_HELPERS_HPP
 
#include <nlohmann/json.hpp>
#include <string>
 
namespace pfc {
namespace ui {
 
using json = nlohmann::json;
 
inline json get_json_value(const json &j, const std::string &key,
                           const std::string &section = "") {
  // First try direct access
  if (j.contains(key)) {
    return j[key];
  }
  // If section is specified, try nested access
  if (!section.empty() && j.contains(section) && j[section].is_object() &&
      j[section].contains(key)) {
    return j[section][key];
  }
  // Try common sections if not specified
  if (section.empty()) {
    // Try domain section for domain-related keys
    if (j.contains("domain") && j["domain"].is_object() &&
        j["domain"].contains(key)) {
      return j["domain"][key];
    }
    // Try timestepping section for time-related keys
    if (j.contains("timestepping") && j["timestepping"].is_object() &&
        j["timestepping"].contains(key)) {
      return j["timestepping"][key];
    }
  }
  return json(nullptr);
}
 
} // namespace ui
} // namespace pfc
 
#endif // PFC_UI_JSON_HELPERS_HPP