combined_log_sink.h

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/*
 * Copyright 2023 MusicScience37 (Kenta Kabashima)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#pragma once
 
#include <string_view>
#include <utility>
#include <vector>
 
#include "num_collect/logging/log_level.h"
#include "num_collect/logging/sinks/log_sink.h"
#include "num_collect/logging/time_stamp.h"
#include "num_collect/util/source_info_view.h"
 
namespace num_collect::logging::sinks {
 
class combined_log_sink {
public:
    explicit combined_log_sink(
        std::vector<std::pair<log_sink, log_level>> sinks)
        : sinks_(std::move(sinks)) {}
 
    ~combined_log_sink() = default;
 
    combined_log_sink(const combined_log_sink&) = delete;
    combined_log_sink(combined_log_sink&&) = delete;
    auto operator=(const combined_log_sink&) -> combined_log_sink& = delete;
    auto operator=(combined_log_sink&&) -> combined_log_sink& = delete;
 
    void write(time_stamp time, std::string_view tag, log_level level,
        util::source_info_view source, std::string_view body) noexcept {
        for (const auto& [sink, output_log_level] : sinks_) {
            if (level >= output_log_level) {
                sink.write(time, tag, level, source, body);
            }
        }
    }
 
private:
    std::vector<std::pair<log_sink, log_level>> sinks_;
};
 
[[nodiscard]] inline auto create_combined_log_sink(
    std::vector<std::pair<log_sink, log_level>> sinks) -> log_sink {
    return create_log_sink<combined_log_sink>(std::move(sinks));
}
 
}  // namespace num_collect::logging::sinks