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proton-bridge/internal/frontend/bridge-gui/bridge-gui/LogUtils.cpp

63 lines
2.5 KiB
C++

// Copyright (c) 2023 Proton AG
//
// This file is part of Proton Mail Bridge.
//
// Proton Mail Bridge is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Proton Mail Bridge 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
#include "LogUtils.h"
#include <bridgepp/BridgeUtils.h>
using namespace bridgepp;
namespace {
qsizetype const logFileTailMaxLength = 25 * 1024; ///< The maximum length of the portion of log returned by tailOfLatestBridgeLog()
}
//****************************************************************************************************************************************************
/// \brief Return the path of the latest bridge log.
/// \return The path of the latest bridge log file.
/// \return An empty string if no bridge log file was found.
//****************************************************************************************************************************************************
QString latestBridgeLogPath() {
QDir const logsDir(userLogsDir());
if (logsDir.isEmpty()) {
return QString();
}
QFileInfoList files = logsDir.entryInfoList({ "v*.log" }, QDir::Files); // could do sorting, but only by last modification time. we want to sort by creation time.
std::sort(files.begin(), files.end(), [](QFileInfo const &lhs, QFileInfo const &rhs) -> bool {
return lhs.birthTime() < rhs.birthTime();
});
return files.back().absoluteFilePath();
}
//****************************************************************************************************************************************************
/// Return the maxSize last bytes of the latest bridge log.
//****************************************************************************************************************************************************
QByteArray tailOfLatestBridgeLog() {
QString path = latestBridgeLogPath();
if (path.isEmpty()) {
return QByteArray();
}
QFile file(path);
return file.open(QIODevice::Text | QIODevice::ReadOnly) ? file.readAll().right(logFileTailMaxLength) : QByteArray();
}