log_state_saver.h

/*********************************************************************************************************************************************/
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/*  Copyright (c) SILVERCODERS Ltd, http://silvercoders.com                                                                                  */
/*  Project homepage: https://github.com/docwire/docwire                                                                                     */
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/*  SPDX-License-Identifier: GPL-2.0-only OR LicenseRef-DocWire-Commercial                                                                   */
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#ifndef DOCWIRE_LOG_STATE_SAVER_H
#define DOCWIRE_LOG_STATE_SAVER_H
 
#include "log_core.h"
 
namespace docwire::log
{
 
class state_saver
{
public:
    state_saver()
        : m_old_sink(get_sink()), m_old_filter(get_filter())
    {}
 
    // Prevent copying and moving to ensure single ownership of restoration responsibility
    state_saver(const state_saver&) = delete;
    state_saver& operator=(const state_saver&) = delete;
    state_saver(state_saver&&) = delete;
    state_saver& operator=(state_saver&&) = delete;
 
    ~state_saver()
    {
        set_sink(m_old_sink);
        set_filter(m_old_filter);
    }
 
private:
    std::function<void(const record&)> m_old_sink;
    std::string m_old_filter;
};
 
} // namespace docwire::log
 
#endif // DOCWIRE_LOG_STATE_SAVER_H