repertory/support/include/utils/file.hpp

/*
  Copyright <2018-2024> <scott.e.graves@protonmail.com>

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
*/
#ifndef REPERTORY_INCLUDE_UTILS_FILE_HPP_
#define REPERTORY_INCLUDE_UTILS_FILE_HPP_

#include "utils/config.hpp"

namespace repertory::utils::file {
class file final {
public:
  [[nodiscard]] static auto open_file(std::filesystem::path path) -> file;

  [[nodiscard]] static auto
  open_or_create_file(std::filesystem::path path) -> file;

protected:
  file(std::fstream stream, std::filesystem::path path)
      : path_(std::move(path)), stream_(std::move(stream)) {}
  file() = default;

public:
  file(const file &) = delete;
  file(file &&file_) noexcept = default;

  ~file() { close(); }

  auto operator=(const file &) noexcept -> file & = delete;
  auto operator=(file &&file_) noexcept -> file & = default;

private:
  std::error_code error_{};
  std::filesystem::path path_;
  std::fstream stream_;

public:
  void close();

  [[nodiscard]] auto get_error_code() const -> std::error_code {
    return error_;
  }

  [[nodiscard]] auto get_path() const -> std::filesystem::path { return path_; }

  [[nodiscard]] auto move_to(std::filesystem::path new_path) -> bool;

  [[nodiscard]] auto read(data_buffer &data, std::uint64_t offset,
                          std::size_t *total_read = nullptr) -> bool {
    return read_(reinterpret_cast<unsigned char *>(data.data()), data.size(),
                 offset, total_read);
  }

  [[nodiscard]] auto remove() -> bool;

  [[nodiscard]] auto truncate() -> bool { return truncate(0U); }

  [[nodiscard]] auto truncate(std::size_t size) -> bool;

#if defined(PROJECT_ENABLE_JSON)
  [[nodiscard]] auto write(const nlohmann::json &data,
                           std::size_t *total_written = nullptr) -> bool {
    auto str_data = data.dump();
    return write_(reinterpret_cast<const unsigned char *>(str_data.c_str()),
                  str_data.size(), 0U, total_written);
  }
#endif // defined(PROJECT_ENABLE_JSON)

  [[nodiscard]] auto write(const data_buffer &data, std::uint64_t offset,
                           std::size_t *total_written = nullptr) -> bool {
    return write_(reinterpret_cast<const unsigned char *>(data.data()),
                  data.size(), offset, total_written);
  }

  [[nodiscard]] operator bool() const { return stream_.is_open(); }

private:
  [[nodiscard]] auto read_(unsigned char *data, std::size_t to_read,
                           std::uint64_t offset,
                           std::size_t *total_read) -> bool;

  [[nodiscard]] auto write_(const unsigned char *data, std::size_t to_write,
                            std::size_t offset,
                            std::size_t *total_written) -> bool;
};

[[nodiscard]] auto get_file_size(std::string_view path,
                                 std::uint64_t &file_size) -> bool;

[[nodiscard]] auto get_file_size(std::wstring_view path,
                                 std::uint64_t &file_size) -> bool;

[[nodiscard]] auto is_directory(std::string_view path) -> bool;

[[nodiscard]] auto is_directory(std::wstring_view path) -> bool;

[[nodiscard]] auto is_file(std::string_view path) -> bool;

[[nodiscard]] auto is_file(std::wstring_view path) -> bool;

#if defined(PROJECT_ENABLE_JSON)
#if defined(PROJECT_ENABLE_LIBSODIUM) && defined(PROJECT_ENABLE_BOOST)
[[nodiscard]] auto
read_json_file(std::string_view path, nlohmann::json &data,
               std::optional<std::string_view> password = std::nullopt) -> bool;

[[nodiscard]] auto read_json_file(
    std::wstring_view path, nlohmann::json &data,
    std::optional<std::wstring_view> password = std::nullopt) -> bool;

[[nodiscard]] auto write_json_file(
    std::string_view path, const nlohmann::json &data,
    std::optional<std::string_view> password = std::nullopt) -> bool;

[[nodiscard]] auto write_json_file(
    std::wstring_view path, const nlohmann::json &data,
    std::optional<std::wstring_view> password = std::nullopt) -> bool;
#else  // !defined(PROJECT_ENABLE_LIBSODIUM) && defined(PROJECT_ENABLE_BOOST)
[[nodiscard]] auto read_json_file(std::string_view path,
                                  nlohmann::json &data) -> bool;

[[nodiscard]] auto read_json_file(std::wstring_view path,
                                  nlohmann::json &data) -> bool;

[[nodiscard]] auto write_json_file(std::string_view path,
                                   const nlohmann::json &data) -> bool;

[[nodiscard]] auto write_json_file(std::wstring_view path,
                                   const nlohmann::json &data) -> bool;
#endif // defined(PROJECT_ENABLE_LIBSODIUM) && defined(PROJECT_ENABLE_BOOST)
#endif // defined(PROJECT_ENABLE_JSON)
} // namespace repertory::utils::file

#endif // REPERTORY_INCLUDE_UTILS_FILE_HPP_