cpp-engine/include/engine/universe.tpp

//
//  universe.tpp
//  engine_base
//
//  Created by Sam Jaffe on 3/15/23.
//

#pragma once

#include <filesystem>
#include <fstream>

#include <json/json.h>

#include <engine/config.h>
#include <engine/universe.h>
#include <serializer/jsonizer.tpp>

namespace engine {
template <typename T>
void Universe::load(std::string const & name, std::string const & fallback) {
  namespace fs = std::filesystem;
  fs::path location = config().property(name, fallback);
  if (!fs::exists(location)) { return; }

  auto import = [this](fs::path const & file) {
    if (file.extension() != "json") { return; }
    Json::Value json;
    std::ifstream in(file.string());
    in >> json;
    std::shared_ptr<T const> tmp;
    if (json.isArray()) {
      for (Json::Value const & elm : json) {
        jsonizer().from_json(tmp, elm);
      }
    } else {
      jsonizer().from_json(tmp, json);
    }
  };

  if (fs::is_directory(location)) {
    std::for_each(fs::directory_iterator(location), {}, import);
  } else {
    import(location);
  }
}
}