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/************************************************************************
*
* Copyright (C) 2021-2024 IRCAD France
*
* This file is part of Sight.
*
* Sight is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sight is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#pragma once
#include <sight/io/session/config.hpp>
#include <core/crypto/password_keeper.hpp>
#include <core/crypto/secure_string.hpp>
#include <core/location/single_file.hpp>
#include <data/object.hpp>
#include <io/__/reader/object_reader.hpp>
#include <io/zip/archive_reader.hpp>
#include <boost/property_tree/ptree.hpp>
namespace sight::io::session
{
/// The deserializer function signature. This is used to register an object deserialization function.
using deserializer_t = std::function<data::object::sptr(
zip::archive_reader&,
const boost::property_tree::ptree&,
const std::map<std::string, data::object::sptr>&,
data::object::sptr,
const core::crypto::secure_string&
)>;
/**
* @brief Session reader.
*
* @details Class to read a session file, and restore recursively a data object, including all fields.
* The session file is indeed a standard "ZIP" archive, while the compression algorithm for files inside
* the session archive is ZSTD. A standard archive reader could open a session file, if it is able to handle
* ZIP archive with ZSTD compression.
*
* The archive can be password protected using AES256 algorithm and the compression level is set individually,
* depending of the type of data to serialize.
*
*/
class SIGHT_IO_SESSION_CLASS_API session_reader final :
public io::reader::object_reader,
public core::location::single_file
{
public:
SIGHT_DECLARE_CLASS(session_reader, io::reader::object_reader);
SIGHT_ALLOW_SHARED_FROM_THIS()
/// Delete default constructors and assignment operators
session_reader(const session_reader&) = delete;
session_reader(session_reader&&) = delete;
session_reader& operator=(const session_reader&) = delete;
session_reader& operator=(session_reader&&) = delete;
/// Constructor
SIGHT_IO_SESSION_API session_reader();
/// Default destructor
SIGHT_IO_SESSION_API ~session_reader() override;
/// Read the session from archive.
SIGHT_IO_SESSION_API void read() override;
/// Defines extension supported by this reader ".zip"
SIGHT_IO_SESSION_API std::string extension() const override;
/// Sets the password
/// @param _password the new password
SIGHT_IO_SESSION_API void set_password(const core::crypto::secure_string& _password);
/// Sets the encryption policy
/// @param _policy the encryption policy: @see sight::io::session::password_keeper::encryption_policy
SIGHT_IO_SESSION_API void set_encryption_policy(core::crypto::password_keeper::encryption_policy _policy);
/// Set archive format
/// @param _archive_format how files are stored in the archive: @see sight::io::zip::archive::archiveFormat
SIGHT_IO_SESSION_API void set_archive_format(zip::archive::archive_format _archive_format);
/// Set a deserialization function for an object
/// @param _class_name the name of the object to serialize
/// @param _deserializer the function pointer to the deserialization function
SIGHT_IO_SESSION_API void set_custom_deserializer(
const std::string& _class_name,
deserializer_t _deserializer = nullptr
);
/// Set a default deserialization function for an object
/// @param _class_name the name of the object to serialize
/// @param _deserializer the function pointer to the deserialization function
SIGHT_IO_SESSION_API static void set_deserializer(
const std::string& _class_name,
deserializer_t _deserializer = nullptr
);
/// Return the registered deserialization function for an object
/// @param _class_name the name of the object to deserialize
/// @return the function pointer to the deserialization function
SIGHT_IO_SESSION_API static deserializer_t deserializer(const std::string& _class_name);
private:
/// PImpl
class session_reader_impl;
std::unique_ptr<session_reader_impl> m_pimpl;
};
} // namespace sight::io::session
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