simple-store/src/data.cpp

#include <data.hpp>
#include <fstream>
#include <iostream>
#include <unistd.h>

fs::path &data::get_data_path() {
  static fs::path p("");
  if (p.native().length() != 0) {
    return p;
  }
  const int uid = getuid();
  if (uid == 0) {
    p = fs::path("/") / "var" / "lib" / "store";
  } else if (const auto ptr = std::getenv("HOME")) {
    p = fs::path(ptr) / ".local" / "lib" / "store";
  }
  return p;
}

data::data() : json(json::object()) {
  if (!fs::exists(get_data_path())) {
    create_data_directory();
  }
  const auto data_file = get_store_path();
  if (!fs::exists(data_file)) {
    try {
      std::ofstream f(data_file);
      f << json::object();
    } catch (const std::exception &e) {
      std::cerr << "Could not create config file:\n" << e.what() << std::endl;
    }
  }
}

void data::create_data_directory() {
  std::error_code ec;
  fs::create_directories(get_data_path(), ec);
  if (ec) {
    std::cerr << "Unable to create configuration directory:\n" << ec.message();
  }
}

fs::path data::get_store_path() { return get_data_path() / "store.json"; }

json data::process(const json &input) {
  if (!validate(input)) {
    return nullptr;
  }

  return input;
}

bool data::validate(const json &input) {
  const std::string name = input.value("name", "");
  const std::string address = input.value("address", "");
  const std::string phone = input.value("phone", "");
  const std::string email = input.value("email", "");

  const std::unordered_map<std::string, std::string> strings{
      {"name", name}, {"address", address}, {"phone", phone}, {"email", email}};

  for (const auto &f : strings) {
    if (f.second.size() == 0) {
      return false;
    }
    if (f.second.size() >= 255) {
      return false;
    }
  }

  return true;
}