dist_filter_sink.hpp

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// This file is part of INSTINCT, the INS Toolkit for Integrated
// Navigation Concepts and Training by the Institute of Navigation of
// the University of Stuttgart, Germany.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 
#pragma once
 
#include "spdlog/sinks/dist_sink.h"
#include <regex>
 
namespace spdlog::sinks
{
 
template<typename Mutex>
class dist_filter_sink : public spdlog::sinks::dist_sink<Mutex> // NOLINT(cppcoreguidelines-virtual-class-destructor)
{
  public:
    explicit dist_filter_sink(const std::string& filter)
        : filter_(filter, std::regex_constants::ECMAScript){};
    ~dist_filter_sink() override = default;
    dist_filter_sink(const dist_filter_sink&) = delete;
    dist_filter_sink(dist_filter_sink&&) noexcept = default;
    dist_filter_sink& operator=(const dist_filter_sink&) = delete;
    dist_filter_sink& operator=(dist_filter_sink&&) noexcept = default;
 
  protected:
    std::regex filter_;
 
    void sink_it_(const spdlog::details::log_msg& msg) override
    {
        spdlog::memory_buf_t formatted_buf;
        spdlog::sinks::base_sink<Mutex>::formatter_->format(msg, formatted_buf);
        std::string formatted = fmt::to_string(formatted_buf);
 
        if (std::regex_search(formatted, filter_))
        {
            spdlog::sinks::dist_sink<Mutex>::sink_it_(msg);
        }
    }
};
 
#ifndef DOXYGEN_IGNORE
 
    #include "spdlog/details/null_mutex.h"
    #include <mutex>
using dist_filter_sink_mt = dist_filter_sink<std::mutex>;
using dist_filter_sink_st = dist_filter_sink<spdlog::details::null_mutex>;
 
#endif
 
} // namespace spdlog::sinks