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// Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
//
// 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.
#ifndef INCLUDED_SRC_BUILDTOOL_LOGGING_LOG_SINK_HPP
#define INCLUDED_SRC_BUILDTOOL_LOGGING_LOG_SINK_HPP
#include <functional>
#include <istream>
#include <memory>
#include <string>
#include "src/buildtool/logging/log_level.hpp"
// forward declaration
class Logger;
class ILogSink {
public:
using Ptr = std::shared_ptr<ILogSink>;
ILogSink() noexcept = default;
ILogSink(ILogSink const&) = delete;
ILogSink(ILogSink&&) = delete;
auto operator=(ILogSink const&) -> ILogSink& = delete;
auto operator=(ILogSink&&) -> ILogSink& = delete;
virtual ~ILogSink() noexcept = default;
/// \brief Thread-safe emitting of log messages.
/// Logger might be 'nullptr' if called from the global context.
virtual void Emit(Logger const* logger,
LogLevel level,
std::string const& msg) const noexcept = 0;
protected:
/// \brief Helper class for line iteration with std::istream_iterator.
class Line : public std::string {
friend auto operator>>(std::istream& is, Line& line) -> std::istream& {
return std::getline(is, line);
}
};
};
using LogSinkFactory = std::function<ILogSink::Ptr()>;
#endif // INCLUDED_SRC_BUILDTOOL_LOGGING_LOG_SINK_HPP
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