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** Copyright (C) 2021 The Qt Company Ltd.
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** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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#include "processutils.h"
#include <QProcess>

namespace Utils {

QIODevice::OpenMode ProcessStartHandler::openMode() const
{
    if (m_processMode == ProcessMode::Writer)
        return QIODevice::ReadWrite; // some writers also read data
    if (m_writeData.isEmpty())
        return QIODevice::ReadOnly; // only reading
    return QIODevice::ReadWrite; // initial write and then reading (close the write channel)
}

void ProcessStartHandler::handleProcessStart(QProcess *process)
{
    if (m_processMode == ProcessMode::Writer)
        return;
    if (m_writeData.isEmpty())
        process->closeWriteChannel();
}

void ProcessStartHandler::handleProcessStarted(QProcess *process)
{
    if (!m_writeData.isEmpty()) {
        process->write(m_writeData);
        m_writeData = {};
        if (m_processMode == ProcessMode::Reader)
            process->closeWriteChannel();
    }
}

} // namespace Utils