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/*
 * Copyright (c) 2007 Henrique Pinto <henrique.pinto@kdemail.net>
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 * Copyright (c) 2008-2009 Harald Hvaal <haraldhv@stud.ntnu.no>
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 * Copyright (c) 2009-2012 Raphael Kubo da Costa <rakuco@FreeBSD.org>
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 * Copyright (c) 2016 Vladyslav Batyrenko <mvlabat@gmail.com>
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 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ( INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION ) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
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#include "jobs.h"
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#include "archiveentry.h"
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#include "ark_debug.h"
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#include <QDir>
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#include <QDirIterator>
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#include <QFileInfo>
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#include <QRegularExpression>
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#include <QThread>
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#include <QTimer>
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#include <QUrl>
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#include <KIO/RenameDialog>
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#include <KLocalizedString>
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namespace Kerfuffle
{
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class Job::Private : public QThread
{
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    Q_OBJECT

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public:
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    Private(Job *job, QObject *parent = 0)
        : QThread(parent)
        , q(job)
    {
    }

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    virtual void run() Q_DECL_OVERRIDE;
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private:
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    Job *q;
};

void Job::Private::run()
{
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    q->doWork();
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}

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Job::Job(Archive *archive, ReadOnlyArchiveInterface *interface)
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    : KJob()
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    , m_archive(archive)
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    , m_archiveInterface(interface)
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    , d(new Private(this))
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{
    setCapabilities(KJob::Killable);
}

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Job::Job(Archive *archive)
    : Job(archive, Q_NULLPTR)
{}

Job::Job(ReadOnlyArchiveInterface *interface)
    : Job(Q_NULLPTR, interface)
{}

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Job::~Job()
{
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    qDeleteAll(m_archiveEntries);
    m_archiveEntries.clear();

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    if (d->isRunning()) {
        d->wait();
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    }

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    delete d;
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}
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ReadOnlyArchiveInterface *Job::archiveInterface()
{
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    // Use the archive interface.
    if (archive()) {
        return archive()->interface();
    }

    // Use the interface passed to this job (e.g. JSONArchiveInterface in jobstest.cpp).
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    return m_archiveInterface;
}

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Archive *Job::archive() const
{
    return m_archive;
}

QString Job::errorString() const
{
    if (!errorText().isEmpty()) {
        return errorText();
    }

    if (archive()) {
        if (archive()->error() == NoPlugin) {
            return i18n("No suitable plugin found. Ark does not seem to support this file type.");
        }

        if (archive()->error() == FailedPlugin) {
            return i18n("Failed to load a suitable plugin. Make sure any executables needed to handle the archive type are installed.");
        }
    }

    return QString();
}

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void Job::start()
{
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    jobTimer.start();
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    // We have an archive but it's not valid, nothing to do.
    if (archive() && !archive()->isValid()) {
        QTimer::singleShot(0, this, [=]() {
            onFinished(false);
        });
        return;
    }

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    if (archiveInterface()->waitForFinishedSignal()) {
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        // CLI-based interfaces run a QProcess, no need to use threads.
        QTimer::singleShot(0, this, &Job::doWork);
    } else {
        // Run the job in another thread.
        d->start();
    }
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}

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void Job::connectToArchiveInterfaceSignals()
{
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    connect(archiveInterface(), &ReadOnlyArchiveInterface::cancelled, this, &Job::onCancelled);
    connect(archiveInterface(), &ReadOnlyArchiveInterface::error, this, &Job::onError);
    connect(archiveInterface(), &ReadOnlyArchiveInterface::entry, this, &Job::onEntry);
    connect(archiveInterface(), &ReadOnlyArchiveInterface::progress, this, &Job::onProgress);
    connect(archiveInterface(), &ReadOnlyArchiveInterface::info, this, &Job::onInfo);
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    connect(archiveInterface(), &ReadOnlyArchiveInterface::finished, this, &Job::onFinished);
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    connect(archiveInterface(), &ReadOnlyArchiveInterface::userQuery, this, &Job::onUserQuery);
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    auto readWriteInterface = qobject_cast<ReadWriteArchiveInterface*>(archiveInterface());
    if (readWriteInterface) {
        connect(readWriteInterface, &ReadWriteArchiveInterface::entryRemoved, this, &Job::onEntryRemoved);
    }
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}

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void Job::onCancelled()
{
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    qCDebug(ARK) << "Cancelled emitted";
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    setError(KJob::KilledJobError);
}

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void Job::onError(const QString & message, const QString & details)
{
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    Q_UNUSED(details)
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    qCDebug(ARK) << "Error emitted:" << message;
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    setError(KJob::UserDefinedError);
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    setErrorText(message);
}

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void Job::onEntry(Archive::Entry *entry)
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{
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    emit newEntry(entry);
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}

void Job::onProgress(double value)
{
    setPercent(static_cast<unsigned long>(100.0*value));
}

void Job::onInfo(const QString& info)
{
    emit infoMessage(this, info);
}

void Job::onEntryRemoved(const QString & path)
{
    emit entryRemoved(path);
}

void Job::onFinished(bool result)
{
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    qCDebug(ARK) << "Job finished, result:" << result << ", time:" << jobTimer.elapsed() << "ms";
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    if (archive() && !archive()->isValid()) {
        setError(KJob::UserDefinedError);
    }

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    emitResult();
}

void Job::onUserQuery(Query *query)
{
    emit userQuery(query);
}

bool Job::doKill()
{
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    if (d->isRunning()) {
        d->requestInterruption();
        d->wait();
    }

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    bool ret = archiveInterface()->doKill();
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    if (!ret) {
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        qCWarning(ARK) << "Killing does not seem to be supported here.";
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    }
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    return ret;
}

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LoadJob::LoadJob(Archive *archive, ReadOnlyArchiveInterface *interface)
    : Job(archive, interface)
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    , m_isSingleFolderArchive(true)
    , m_isPasswordProtected(false)
    , m_extractedFilesSize(0)
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    , m_dirCount(0)
    , m_filesCount(0)
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{
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    qCDebug(ARK) << "LoadJob created";
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    connect(this, &LoadJob::newEntry, this, &LoadJob::onNewEntry);
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}

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LoadJob::LoadJob(Archive *archive)
    : LoadJob(archive, Q_NULLPTR)
{}

LoadJob::LoadJob(ReadOnlyArchiveInterface *interface)
    : LoadJob(Q_NULLPTR, interface)
{}

void LoadJob::doWork()
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{
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    emit description(this, i18n("Loading archive"), qMakePair(i18n("Archive"), archiveInterface()->filename()));
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    connectToArchiveInterfaceSignals();
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    bool ret = archiveInterface()->list();
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    if (!archiveInterface()->waitForFinishedSignal()) {
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        onFinished(ret);
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    }
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}

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void LoadJob::onFinished(bool result)
{
    if (archive()) {
        archive()->setProperty("unpackedSize", extractedFilesSize());
        archive()->setProperty("isSingleFolder", isSingleFolderArchive());
        const auto name = subfolderName().isEmpty() ? archive()->completeBaseName() : subfolderName();
        archive()->setProperty("subfolderName", name);
        if (isPasswordProtected()) {
            archive()->setProperty("encryptionType",  archive()->password().isEmpty() ? Archive::Encrypted : Archive::HeaderEncrypted);
        }
    }

    Job::onFinished(result);
}

qlonglong LoadJob::extractedFilesSize() const
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{
    return m_extractedFilesSize;
}

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bool LoadJob::isPasswordProtected() const
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{
    return m_isPasswordProtected;
}

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bool LoadJob::isSingleFolderArchive() const
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{
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    if (m_filesCount == 1 && m_dirCount == 0) {
        return false;
    }

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    return m_isSingleFolderArchive;
}

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void LoadJob::onNewEntry(const Archive::Entry *entry)
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{
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    m_extractedFilesSize += entry->property("size").toLongLong();
    m_isPasswordProtected |= entry->property("isPasswordProtected").toBool();
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    if (entry->isDir()) {
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        m_dirCount++;
    } else {
        m_filesCount++;
    }

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    if (m_isSingleFolderArchive) {
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        // RPM filenames have the ./ prefix, and "." would be detected as the subfolder name, so we remove it.
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        const QString fullPath = entry->fullPath().replace(QRegularExpression(QStringLiteral("^\\./")), QString());
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        const QString basePath = fullPath.split(QLatin1Char('/')).at(0);
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        if (m_basePath.isEmpty()) {
            m_basePath = basePath;
            m_subfolderName = basePath;
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        } else {
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            if (m_basePath != basePath) {
                m_isSingleFolderArchive = false;
                m_subfolderName.clear();
            }
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        }
    }
}

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QString LoadJob::subfolderName() const
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{
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    if (!isSingleFolderArchive()) {
        return QString();
    }

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    return m_subfolderName;
}

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BatchExtractJob::BatchExtractJob(LoadJob *loadJob, const QString &destination, bool autoSubfolder, bool preservePaths)
    : Job(loadJob->archive())
    , m_loadJob(loadJob)
    , m_destination(destination)
    , m_autoSubfolder(autoSubfolder)
    , m_preservePaths(preservePaths)
{
    qCDebug(ARK) << "BatchExtractJob created";
}

void BatchExtractJob::doWork()
{
    connect(m_loadJob, &KJob::result, this, &BatchExtractJob::slotLoadingFinished);

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    // Forward LoadJob's signals.
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    connect(m_loadJob, &Kerfuffle::Job::newEntry, this, &BatchExtractJob::newEntry);
    connect(m_loadJob, &Kerfuffle::Job::userQuery, this, &BatchExtractJob::userQuery);
    m_loadJob->start();
}

void BatchExtractJob::slotLoadingFinished(KJob *job)
{
    if (job->error()) {
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        // Forward errors as well.
        onError(job->errorString(), QString());
        onFinished(false);
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        return;
    }

    // Now we can start extraction.
    setupDestination();

    Kerfuffle::ExtractionOptions options;
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    options.setPreservePaths(m_preservePaths);
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    auto extractJob = archive()->extractFiles({}, m_destination, options);
    if (extractJob) {
        connect(extractJob, &KJob::result, this, &BatchExtractJob::emitResult);
        connect(extractJob, &Kerfuffle::Job::userQuery, this, &BatchExtractJob::userQuery);
        extractJob->start();
    } else {
        emitResult();
    }
}

void BatchExtractJob::setupDestination()
{
    const bool isSingleFolderRPM = (archive()->isSingleFolder() &&
                                   (archive()->mimeType().name() == QLatin1String("application/x-rpm")));

    if (m_autoSubfolder && (!archive()->isSingleFolder() || isSingleFolderRPM)) {
        const QDir d(m_destination);
        QString subfolderName = archive()->subfolderName();

        // Special case for single folder RPM archives.
        // We don't want the autodetected folder to have a meaningless "usr" name.
        if (isSingleFolderRPM && subfolderName == QStringLiteral("usr")) {
            qCDebug(ARK) << "Detected single folder RPM archive. Using archive basename as subfolder name";
            subfolderName = QFileInfo(archive()->fileName()).completeBaseName();
        }

        if (d.exists(subfolderName)) {
            subfolderName = KIO::suggestName(QUrl::fromUserInput(m_destination, QString(), QUrl::AssumeLocalFile), subfolderName);
        }

        d.mkdir(subfolderName);

        m_destination += QLatin1Char( '/' ) + subfolderName;
    }
}

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CreateJob::CreateJob(Archive *archive, const QVector<Archive::Entry*> &entries, const CompressionOptions &options)
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    : Job(archive)
    , m_entries(entries)
    , m_options(options)
{
    qCDebug(ARK) << "CreateJob created";
}

void CreateJob::enableEncryption(const QString &password, bool encryptHeader)
{
    archive()->encrypt(password, encryptHeader);
}

void CreateJob::setMultiVolume(bool isMultiVolume)
{
    archive()->setMultiVolume(isMultiVolume);
}

void CreateJob::doWork()
{
    auto addJob = archive()->addFiles(m_entries, new Archive::Entry(this), m_options);

    if (addJob) {
        connect(addJob, &KJob::result, this, &CreateJob::emitResult);
        addJob->start();
    } else {
        emitResult();
    }
}

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ExtractJob::ExtractJob(const QVector<Archive::Entry*> &entries, const QString &destinationDir, const ExtractionOptions &options, ReadOnlyArchiveInterface *interface)
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    : Job(interface)
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    , m_entries(entries)
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    , m_destinationDir(destinationDir)
    , m_options(options)
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{
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    qCDebug(ARK) << "ExtractJob created";
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}

void ExtractJob::doWork()
{
    QString desc;
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    if (m_entries.count() == 0) {
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        desc = i18n("Extracting all files");
    } else {
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        desc = i18np("Extracting one file", "Extracting %1 files", m_entries.count());
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    }
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    emit description(this, desc, qMakePair(i18n("Archive"), archiveInterface()->filename()));
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    QFileInfo destDirInfo(m_destinationDir);
    if (destDirInfo.isDir() && (!destDirInfo.isWritable() || !destDirInfo.isExecutable())) {
        onError(xi18n("Could not write to destination <filename>%1</filename>.<nl/>Check whether you have sufficient permissions.", m_destinationDir), QString());
        onFinished(false);
        return;
    }

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    connectToArchiveInterfaceSignals();
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    qCDebug(ARK) << "Starting extraction with" << m_entries.count() << "selected files."
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             << m_entries
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             << "Destination dir:" << m_destinationDir
             << "Options:" << m_options;
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    bool ret = archiveInterface()->extractFiles(m_entries, m_destinationDir, m_options);
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    if (!archiveInterface()->waitForFinishedSignal()) {
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        onFinished(ret);
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    }
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}

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QString ExtractJob::destinationDirectory() const
{
    return m_destinationDir;
}

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ExtractionOptions ExtractJob::extractionOptions() const
{
    return m_options;
}

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TempExtractJob::TempExtractJob(Archive::Entry *entry, bool passwordProtectedHint, ReadOnlyArchiveInterface *interface)
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    : Job(interface)
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    , m_entry(entry)
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    , m_passwordProtectedHint(passwordProtectedHint)
{
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    m_tmpExtractDir = new QTemporaryDir();
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}

QString TempExtractJob::validatedFilePath() const
{
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    QString path = extractionDir() + QLatin1Char('/') + m_entry->fullPath();
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    // Make sure a maliciously crafted archive with parent folders named ".." do
    // not cause the previewed file path to be located outside the temporary
    // directory, resulting in a directory traversal issue.
    path.remove(QStringLiteral("../"));

    return path;
}

ExtractionOptions TempExtractJob::extractionOptions() const
{
    ExtractionOptions options;

    if (m_passwordProtectedHint) {
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        options.setEncryptedArchiveHint(true);
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    }

    return options;
}

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QTemporaryDir *TempExtractJob::tempDir() const
{
    return m_tmpExtractDir;
}

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void TempExtractJob::doWork()
{
    emit description(this, i18n("Extracting one file"));

    connectToArchiveInterfaceSignals();

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    qCDebug(ARK) << "Extracting:" << m_entry;
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    bool ret = archiveInterface()->extractFiles({m_entry}, extractionDir(), extractionOptions());
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    if (!archiveInterface()->waitForFinishedSignal()) {
        onFinished(ret);
    }
}

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QString TempExtractJob::extractionDir() const
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{
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    return m_tmpExtractDir->path();
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}

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PreviewJob::PreviewJob(Archive::Entry *entry, bool passwordProtectedHint, ReadOnlyArchiveInterface *interface)
    : TempExtractJob(entry, passwordProtectedHint, interface)
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{
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    qCDebug(ARK) << "PreviewJob created";
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}

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OpenJob::OpenJob(Archive::Entry *entry, bool passwordProtectedHint, ReadOnlyArchiveInterface *interface)
    : TempExtractJob(entry, passwordProtectedHint, interface)
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{
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    qCDebug(ARK) << "OpenJob created";
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}

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OpenWithJob::OpenWithJob(Archive::Entry *entry, bool passwordProtectedHint, ReadOnlyArchiveInterface *interface)
    : OpenJob(entry, passwordProtectedHint, interface)
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{
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    qCDebug(ARK) << "OpenWithJob created";
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}

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AddJob::AddJob(const QVector<Archive::Entry*> &entries, const Archive::Entry *destination, const CompressionOptions& options, ReadWriteArchiveInterface *interface)
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    : Job(interface)
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    , m_entries(entries)
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    , m_destination(destination)
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    , m_options(options)
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{
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    qCDebug(ARK) << "AddJob created";
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}

void AddJob::doWork()
{
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    // Set current dir.
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    const QString globalWorkDir = m_options.globalWorkDir();
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    const QDir workDir = globalWorkDir.isEmpty() ? QDir::current() : QDir(globalWorkDir);
    if (!globalWorkDir.isEmpty()) {
        qCDebug(ARK) << "GlobalWorkDir is set, changing dir to " << globalWorkDir;
        m_oldWorkingDir = QDir::currentPath();
        QDir::setCurrent(globalWorkDir);
    }

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    // Count total number of entries to be added.
    qulonglong totalCount = 0;
    QElapsedTimer timer;
    timer.start();
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    foreach (const Archive::Entry* entry, m_entries) {
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        totalCount++;
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        if (QFileInfo(entry->fullPath()).isDir()) {
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            QDirIterator it(entry->fullPath(), QDir::AllEntries | QDir::Readable | QDir::Hidden | QDir::NoDotAndDotDot, QDirIterator::Subdirectories);
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            while (it.hasNext()) {
                it.next();
                totalCount++;
            }
        }
    }

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    qCDebug(ARK) << "AddJob: going to add" << totalCount << "entries, counted in" << timer.elapsed() << "ms";
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    QString desc = i18np("Adding a file", "Adding %1 files", totalCount);
    emit description(this, desc, qMakePair(i18n("Archive"), archiveInterface()->filename()));
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    ReadWriteArchiveInterface *m_writeInterface =
        qobject_cast<ReadWriteArchiveInterface*>(archiveInterface());

    Q_ASSERT(m_writeInterface);

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    // The file paths must be relative to GlobalWorkDir.
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    foreach (Archive::Entry *entry, m_entries) {
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        // #191821: workDir must be used instead of QDir::current()
        //          so that symlinks aren't resolved automatically
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        const QString &fullPath = entry->fullPath();
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        QString relativePath = workDir.relativeFilePath(fullPath);
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        if (fullPath.endsWith(QLatin1Char('/'))) {
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            relativePath += QLatin1Char('/');
        }

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        entry->setFullPath(relativePath);
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    }

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    connectToArchiveInterfaceSignals();
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    bool ret = m_writeInterface->addFiles(m_entries, m_destination, m_options, totalCount);
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    if (!archiveInterface()->waitForFinishedSignal()) {
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        onFinished(ret);
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    }
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}

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void AddJob::onFinished(bool result)
{
    if (!m_oldWorkingDir.isEmpty()) {
        QDir::setCurrent(m_oldWorkingDir);
    }

    Job::onFinished(result);
}

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MoveJob::MoveJob(const QVector<Archive::Entry*> &entries, Archive::Entry *destination, const CompressionOptions& options , ReadWriteArchiveInterface *interface)
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    : Job(interface)
    , m_finishedSignalsCount(0)
    , m_entries(entries)
    , m_destination(destination)
    , m_options(options)
{
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    qCDebug(ARK) << "MoveJob created";
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}

void MoveJob::doWork()
{
    qCDebug(ARK) << "MoveJob: going to move" << m_entries.count() << "file(s)";

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    QString desc = i18np("Moving a file", "Moving %1 files", m_entries.count());
    emit description(this, desc, qMakePair(i18n("Archive"), archiveInterface()->filename()));
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    ReadWriteArchiveInterface *m_writeInterface =
        qobject_cast<ReadWriteArchiveInterface*>(archiveInterface());

    Q_ASSERT(m_writeInterface);

    connectToArchiveInterfaceSignals();
    bool ret = m_writeInterface->moveFiles(m_entries, m_destination, m_options);

    if (!archiveInterface()->waitForFinishedSignal()) {
        onFinished(ret);
    }
}

void MoveJob::onFinished(bool result)
{
    m_finishedSignalsCount++;
    if (m_finishedSignalsCount == archiveInterface()->moveRequiredSignals()) {
        Job::onFinished(result);
    }
}

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CopyJob::CopyJob(const QVector<Archive::Entry*> &entries, Archive::Entry *destination, const CompressionOptions &options, ReadWriteArchiveInterface *interface)
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    : Job(interface)
    , m_finishedSignalsCount(0)
    , m_entries(entries)
    , m_destination(destination)
    , m_options(options)
{
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    qCDebug(ARK) << "CopyJob created";
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}

void CopyJob::doWork()
{
    qCDebug(ARK) << "CopyJob: going to copy" << m_entries.count() << "file(s)";

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    QString desc = i18np("Copying a file", "Copying %1 files", m_entries.count());
    emit description(this, desc, qMakePair(i18n("Archive"), archiveInterface()->filename()));
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    ReadWriteArchiveInterface *m_writeInterface =
        qobject_cast<ReadWriteArchiveInterface*>(archiveInterface());

    Q_ASSERT(m_writeInterface);

    connectToArchiveInterfaceSignals();
    bool ret = m_writeInterface->copyFiles(m_entries, m_destination, m_options);

    if (!archiveInterface()->waitForFinishedSignal()) {
        onFinished(ret);
    }
}

void CopyJob::onFinished(bool result)
{
    m_finishedSignalsCount++;
    if (m_finishedSignalsCount == archiveInterface()->copyRequiredSignals()) {
        Job::onFinished(result);
    }
}

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DeleteJob::DeleteJob(const QVector<Archive::Entry*> &entries, ReadWriteArchiveInterface *interface)
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    : Job(interface)
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    , m_entries(entries)
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{
}

void DeleteJob::doWork()
{
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    QString desc = i18np("Deleting a file from the archive", "Deleting %1 files", m_entries.count());
    emit description(this, desc, qMakePair(i18n("Archive"), archiveInterface()->filename()));
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    ReadWriteArchiveInterface *m_writeInterface =
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        qobject_cast<ReadWriteArchiveInterface*>(archiveInterface());
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    Q_ASSERT(m_writeInterface);

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    connectToArchiveInterfaceSignals();
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    bool ret = m_writeInterface->deleteFiles(m_entries);
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    if (!archiveInterface()->waitForFinishedSignal()) {
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        onFinished(ret);
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    }
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}
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CommentJob::CommentJob(const QString& comment, ReadWriteArchiveInterface *interface)
    : Job(interface)
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    , m_comment(comment)
{
}

void CommentJob::doWork()
{
    emit description(this, i18n("Adding comment"));

    ReadWriteArchiveInterface *m_writeInterface =
        qobject_cast<ReadWriteArchiveInterface*>(archiveInterface());

    Q_ASSERT(m_writeInterface);

    connectToArchiveInterfaceSignals();
    bool ret = m_writeInterface->addComment(m_comment);

    if (!archiveInterface()->waitForFinishedSignal()) {
        onFinished(ret);
    }
}

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TestJob::TestJob(ReadOnlyArchiveInterface *interface)
    : Job(interface)
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{
    m_testSuccess = false;
}

void TestJob::doWork()
{
    qCDebug(ARK) << "TestJob started";

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    emit description(this, i18n("Testing archive"), qMakePair(i18n("Archive"), archiveInterface()->filename()));

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    connectToArchiveInterfaceSignals();
    connect(archiveInterface(), &ReadOnlyArchiveInterface::testSuccess, this, &TestJob::onTestSuccess);

    bool ret = archiveInterface()->testArchive();

    if (!archiveInterface()->waitForFinishedSignal()) {
        onFinished(ret);
    }
}

void TestJob::onTestSuccess()
{
    m_testSuccess = true;
}

bool TestJob::testSucceeded()
{
    return m_testSuccess;
}

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} // namespace Kerfuffle
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#include "jobs.moc"