dumper.cpp

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/

#include "dumper.h"

#include <QCoreApplication>
#include <QProcess>
#include <QtDebug>
#include <util/sll/qtutil.h>
#include <util/threads/coro.h>

namespace LC::Util
{
    namespace
    {
        struct Tr
        {
            Q_DECLARE_TR_FUNCTIONS (LC::Util::DumpSqlite)
        };

        Either<QString, Void> CheckProcessFinishStatus (QProcess& process)
        {
            const auto& procStdErr = process.readAllStandardError ();
            switch (process.exitStatus ())
            {
            case QProcess::CrashExit:
            {
                const auto& procErr = process.errorString ();

                if (process.error () == QProcess::FailedToStart)
                    return Left { Tr::tr ("Unable to start dumping process: %1. Do you have sqlite3 installed?").arg (procErr) };

                const auto& message = procStdErr.isEmpty () ?
                        Tr::tr ("Dumping process crashed: %1.").arg (procErr) :
                        Tr::tr ("Dumping process crashed: %1 (%2).").arg (procErr, procStdErr);
                return Left { message };
            }
            case QProcess::NormalExit:
                if (const auto ec = process.exitCode ())
                {
                    const auto& message = Tr::tr ("Dumping process returned an error: %1 (%2).")
                            .arg (ec)
                            .arg (procStdErr);
                    return Left { message };
                }
                break;
            }

            return Void {};
        }
    }

    Task<Either<QString, Void>> DumpSqlite (QString from, QString to)
    {
        QProcess dumper;
        QProcess restorer;

        dumper.setStandardOutputProcess (&restorer);

        static const auto sqlite = "sqlite3"_qs;
        dumper.start (sqlite, { from, ".dump"_qs });
        restorer.start (sqlite, { to });

        co_await dumper;
        co_await CheckProcessFinishStatus (dumper);

        co_await restorer;
        co_await CheckProcessFinishStatus (restorer);

        co_return Void {};
    }
}