/*
    This file is part of KMail, the KDE mail client.
    SPDX-FileCopyrightText: 2002 Don Sanders <sanders@kde.org>
    SPDX-FileCopyrightText: 2013-2025 Laurent Montel <montel@kde.org>

    SPDX-License-Identifier: GPL-2.0-only
*/

//
// This file implements various "command" classes. These command classes
// are based on the command design pattern.
//
// Historically various operations were implemented as slots of KMMainWin.
// This proved inadequate as KMail has multiple top level windows
// (KMMainWin, KMReaderMainWin, SearchWindow, KMComposeWin) that may
// benefit from using these operations. It is desirable that these
// classes can operate without depending on or altering the state of
// a KMMainWin, in fact it is possible no KMMainWin object even exists.
//
// Now these operations have been rewritten as KMCommand based classes,
// making them independent of KMMainWin.
//
// The base command class KMCommand is async, which is a difference
// from the conventional command pattern. As normal derived classes implement
// the execute method, but client classes call start() instead of
// calling execute() directly. start() initiates async operations,
// and on completion of these operations calls execute() and then deletes
// the command. (So the client must not construct commands on the stack).
//
// The type of async operation supported by KMCommand is retrieval
// of messages from an IMAP server.

#include "kmcommands.h"

#include "kmail_debug.h"
#include "kmreadermainwin.h"
#include "secondarywindow.h"
#include "util.h"
#include "widgets/collectionpane.h"

#include "job/createforwardmessagejob.h"
#include "job/createreplymessagejob.h"

#include "editor/composer.h"
#include "kmmainwidget.h"
#include "undostack.h"

#include <KIdentityManagementCore/IdentityManager>

#include <KMime/MDN>

#include <Akonadi/ItemCopyJob>
#include <Akonadi/ItemCreateJob>
#include <Akonadi/ItemDeleteJob>
#include <Akonadi/ItemFetchJob>
#include <Akonadi/ItemModifyJob>
#include <Akonadi/ItemMoveJob>
#include <Akonadi/Tag>
#include <Akonadi/TagCreateJob>

#include <Akonadi/MDNStateAttribute>
#include <MailCommon/CryptoUtils>
#include <MailCommon/FilterAction>
#include <MailCommon/FilterManager>
#include <MailCommon/FolderSettings>
#include <MailCommon/MailFilter>
#include <MailCommon/MailKernel>
#include <MailCommon/MailUtil>
#include <MailCommon/RedirectDialog>

#include <MessageCore/MailingList>
#include <MessageCore/MessageCoreSettings>
#include <MessageCore/StringUtil>

#include <MessageComposer/MessageComposerSettings>
#include <MessageComposer/MessageHelper>
#include <MessageComposer/MessageSender>
#include <MessageComposer/Util>

#include <MessageList/Pane>

#include <MessageViewer/CSSHelper>
#include <MessageViewer/HeaderStylePlugin>
#include <MessageViewer/MessageViewerSettings>
#include <MessageViewer/MessageViewerUtil>
#include <MessageViewer/ObjectTreeEmptySource>

#include <MimeTreeParser/NodeHelper>
#include <MimeTreeParser/ObjectTreeParser>

#include <Akonadi/SentBehaviourAttribute>
#include <Akonadi/TransportAttribute>
#include <MailTransport/TransportManager>

#include <Libkdepim/ProgressManager>
#include <PimCommon/BroadcastStatus>

#include <KCursorSaver>

#include <gpgme++/error.h>

#include <KBookmarkManager>

#include <KEmailAddress>
#include <KFileWidget>
#include <KLocalizedString>
#include <KMessageBox>
#include <KRecentDirs>

// KIO headers
#include <KIO/FileCopyJob>
#include <KIO/JobUiDelegate>
#include <KIO/StatJob>

#include <QApplication>
#include <QByteArray>
#include <QFileDialog>
#include <QFontDatabase>
#include <QProgressDialog>
#include <QStandardPaths>

using KMail::SecondaryWindow;
using MailTransport::TransportManager;
using MessageComposer::MessageFactoryNG;

using KPIM::ProgressItem;
using KPIM::ProgressManager;
using namespace KMime;

using namespace MailCommon;
using namespace Qt::Literals::StringLiterals;

/// Helper to sanely show an error message for a job
static void showJobError(KJob *job)
{
    assert(job);
    // we can be called from the KJob::kill, where we are no longer a KIO::Job
    // so better safe than sorry
    auto kiojob = qobject_cast<KIO::Job *>(job);
    if (kiojob && kiojob->uiDelegate()) {
        kiojob->uiDelegate()->showErrorMessage();
    } else {
        qCWarning(KMAIL_LOG) << "There is no GUI delegate set for a kjob, and it failed with error:" << job->errorString();
    }
}

KMCommand::KMCommand(QWidget *parent)
    : mDeletesItself(false)
    , mEmitsCompletedItself(false)
    , mParent(parent)
{
}

KMCommand::KMCommand(QWidget *parent, const Akonadi::Item &msg)
    : KMCommand(parent)
{
    if (msg.isValid() || msg.hasPayload<std::shared_ptr<KMime::Message>>()) {
        mMsgList.append(msg);
    }
}

KMCommand::KMCommand(QWidget *parent, const Akonadi::Item::List &msgList)
    : KMCommand(parent)
{
    mMsgList = msgList;
}

KMCommand::~KMCommand() = default;

KMCommand::Result KMCommand::result() const
{
    if (mResult == Undefined) {
        qCDebug(KMAIL_LOG) << "mResult is Undefined";
    }
    return mResult;
}

const Akonadi::Item::List KMCommand::retrievedMsgs() const
{
    return mRetrievedMsgs;
}

Akonadi::Item KMCommand::retrievedMessage() const
{
    if (mRetrievedMsgs.isEmpty()) {
        return {};
    }
    return *(mRetrievedMsgs.begin());
}

QWidget *KMCommand::parentWidget() const
{
    return mParent;
}

bool KMCommand::deletesItself() const
{
    return mDeletesItself;
}

void KMCommand::setDeletesItself(bool deletesItself)
{
    mDeletesItself = deletesItself;
}

bool KMCommand::emitsCompletedItself() const
{
    return mEmitsCompletedItself;
}

void KMCommand::setEmitsCompletedItself(bool emitsCompletedItself)
{
    mEmitsCompletedItself = emitsCompletedItself;
}

void KMCommand::setResult(KMCommand::Result result)
{
    mResult = result;
}

int KMCommand::mCountJobs = 0;

void KMCommand::start()
{
    connect(this, &KMCommand::messagesTransfered, this, &KMCommand::slotPostTransfer);

    if (mMsgList.isEmpty()) {
        Q_EMIT messagesTransfered(OK);
        return;
    }

    // Special case of operating on message that isn't in a folder
    const Akonadi::Item mb = mMsgList.constFirst();
    if ((mMsgList.count() == 1) && MessageComposer::Util::isStandaloneMessage(mb)) {
        mRetrievedMsgs.append(mMsgList.takeFirst());
        Q_EMIT messagesTransfered(OK);
        return;
    }

    // we can only retrieve items with a valid id
    for (const Akonadi::Item &item : std::as_const(mMsgList)) {
        if (!item.isValid()) {
            Q_EMIT messagesTransfered(Failed);
            return;
        }
    }

    // transfer the selected messages first
    transferSelectedMsgs();
}

void KMCommand::slotPostTransfer(KMCommand::Result result)
{
    disconnect(this, &KMCommand::messagesTransfered, this, &KMCommand::slotPostTransfer);
    if (result == OK) {
        result = execute();
    }
    mResult = result;
    if (!emitsCompletedItself()) {
        Q_EMIT completed(this);
    }
    if (!deletesItself()) {
        deleteLater();
    }
}

Akonadi::ItemFetchJob *KMCommand::createFetchJob(const Akonadi::Item::List &items)
{
    return new Akonadi::ItemFetchJob(items, this);
}

void KMCommand::fetchMessages(const Akonadi::Item::List &ids)
{
    ++KMCommand::mCountJobs;
    Akonadi::ItemFetchJob *fetch = createFetchJob(ids);
    mFetchScope.fetchAttribute<Akonadi::MDNStateAttribute>();
    fetch->setFetchScope(mFetchScope);
    connect(fetch, &Akonadi::ItemFetchJob::itemsReceived, this, &KMCommand::slotMsgTransfered);
    connect(fetch, &Akonadi::ItemFetchJob::result, this, &KMCommand::slotJobFinished);
}

void KMCommand::transferSelectedMsgs()
{
    // make sure no other transfer is active
    if (KMCommand::mCountJobs > 0) {
        Q_EMIT messagesTransfered(Failed);
        return;
    }

    bool complete = true;
    KMCommand::mCountJobs = 0;
    mCountMsgs = 0;
    mRetrievedMsgs.clear();
    mCountMsgs = mMsgList.count();
    // the QProgressDialog for the user-feedback. Only enable it if it's needed.
    // For some commands like KMSetStatusCommand it's not needed. Note, that
    // for some reason the QProgressDialog eats the MouseReleaseEvent (if a
    // command is executed after the MousePressEvent), cf. bug #71761.
    if (mCountMsgs > 0) {
        mProgressDialog = new QProgressDialog(mParent);
        mProgressDialog.data()->setWindowTitle(i18nc("@title:window", "Please wait"));

        mProgressDialog.data()->setLabelText(
            i18np("Please wait while the message is transferred", "Please wait while the %1 messages are transferred", mMsgList.count()));
        mProgressDialog.data()->setModal(true);
        mProgressDialog.data()->setMinimumDuration(1000);
    }

    // TODO once the message list is based on ETM and we get the more advanced caching we need to make that check a bit more clever
    if (!mFetchScope.isEmpty()) {
        complete = false;
        Akonadi::Item::List ids;
        ids.reserve(100);
        for (const Akonadi::Item &item : std::as_const(mMsgList)) {
            ids.append(item);
            if (ids.count() >= 100) {
                fetchMessages(ids);
                ids.clear();
                ids.reserve(100);
            }
        }
        if (!ids.isEmpty()) {
            fetchMessages(ids);
        }
    } else {
        // no need to fetch anything
        if (!mMsgList.isEmpty()) {
            mRetrievedMsgs = mMsgList;
        }
    }

    if (complete) {
        delete mProgressDialog.data();
        mProgressDialog.clear();
        Q_EMIT messagesTransfered(OK);
    } else {
        // wait for the transfer and tell the progressBar the necessary steps
        if (mProgressDialog.data()) {
            connect(mProgressDialog.data(), &QProgressDialog::canceled, this, &KMCommand::slotTransferCancelled);
            constexpr uint totalSize = 0;

            mProgressDialog.data()->setMaximum(totalSize);
        }
    }
}

void KMCommand::slotMsgTransfered(const Akonadi::Item::List &msgs)
{
    if (mProgressDialog.data() && mProgressDialog.data()->wasCanceled()) {
        Q_EMIT messagesTransfered(Canceled);
        return;
    }
    // save the complete messages
    mRetrievedMsgs.append(msgs);
}

void KMCommand::slotJobFinished()
{
    // the job is finished (with / without error)
    KMCommand::mCountJobs--;

    if (mProgressDialog.data() && mProgressDialog.data()->wasCanceled()) {
        return;
    }

    if (KMCommand::mCountJobs == 0 && (mCountMsgs > mRetrievedMsgs.count())) {
        // the message wasn't retrieved before => error
        if (mProgressDialog.data()) {
            mProgressDialog.data()->hide();
        }
        slotTransferCancelled();
        return;
    }
    // update the progressbar
    if (mProgressDialog.data()) {
        mProgressDialog.data()->setLabelText(
            i18np("Please wait while the message is transferred", "Please wait while the %1 messages are transferred", mCountMsgs));
    }
    if (KMCommand::mCountJobs == 0) {
        // all done
        delete mProgressDialog.data();
        mProgressDialog.clear();
        Q_EMIT messagesTransfered(OK);
    }
}

void KMCommand::slotTransferCancelled()
{
    KMCommand::mCountJobs = 0;
    mCountMsgs = 0;
    mRetrievedMsgs.clear();
    Q_EMIT messagesTransfered(Canceled);
}

KMMailtoComposeCommand::KMMailtoComposeCommand(const QUrl &url, const Akonadi::Item &msg)
    : mUrl(url)
    , mMessage(msg)
{
}

KMCommand::Result KMMailtoComposeCommand::execute()
{
    std::shared_ptr<KMime::Message> msg(new KMime::Message);
    uint id = 0;

    if (mMessage.isValid() && mMessage.parentCollection().isValid()) {
        QSharedPointer<FolderSettings> fd = FolderSettings::forCollection(mMessage.parentCollection(), false);
        id = fd->identity();
    }

    MessageHelper::initHeader(msg, KMKernel::self()->identityManager(), id);
    // Already defined in MessageHelper::initHeader
    msg->contentType(KMime::CreatePolicy::DontCreate)->setCharset(QByteArrayLiteral("utf-8"));
    msg->to()->fromUnicodeString(KEmailAddress::decodeMailtoUrl(mUrl));

    KMail::Composer *win = KMail::makeComposer(msg, false, false, KMail::Composer::TemplateContext::New, id);
    win->setFocusToSubject();
    win->show();
    return OK;
}

KMMailtoReplyCommand::KMMailtoReplyCommand(QWidget *parent, const QUrl &url, const Akonadi::Item &msg, const QString &selection)
    : KMCommand(parent, msg)
    , mUrl(url)
    , mSelection(selection)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMCommand::Result KMMailtoReplyCommand::execute()
{
    Akonadi::Item item = retrievedMessage();
    std::shared_ptr<KMime::Message> msg = MessageComposer::Util::message(item);
    if (!msg) {
        return Failed;
    }
    CreateReplyMessageJobSettings settings;
    settings.item = item;
    settings.msg = msg;
    settings.selection = mSelection;
    settings.url = mUrl;
    settings.replyStrategy = MessageComposer::ReplyNone;
    settings.replyAsHtml = mReplyAsHtml;

    auto job = new CreateReplyMessageJob;
    job->setSettings(settings);
    job->start();

    return OK;
}

bool KMMailtoReplyCommand::replyAsHtml() const
{
    return mReplyAsHtml;
}

void KMMailtoReplyCommand::setReplyAsHtml(bool replyAsHtml)
{
    mReplyAsHtml = replyAsHtml;
}

KMMailtoForwardCommand::KMMailtoForwardCommand(QWidget *parent, const QUrl &url, const Akonadi::Item &msg)
    : KMCommand(parent, msg)
    , mUrl(url)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMCommand::Result KMMailtoForwardCommand::execute()
{
    // TODO : consider factoring createForward into this method.
    Akonadi::Item item = retrievedMessage();
    std::shared_ptr<KMime::Message> msg = MessageComposer::Util::message(item);
    if (!msg) {
        return Failed;
    }
    CreateForwardMessageJobSettings settings;
    settings.item = item;
    settings.msg = msg;
    settings.url = mUrl;

    auto job = new CreateForwardMessageJob;
    job->setSettings(settings);
    job->start();
    return OK;
}

KMAddBookmarksCommand::KMAddBookmarksCommand(const QUrl &url, QWidget *parent)
    : KMCommand(parent)
    , mUrl(url)
{
}

KMCommand::Result KMAddBookmarksCommand::execute()
{
    const QString filename = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + "/konqueror/bookmarks.xml"_L1;
    QFileInfo fileInfo(filename);
    QDir().mkpath(fileInfo.absolutePath());
    KBookmarkManager bookManager(filename);
    KBookmarkGroup group = bookManager.root();
    group.addBookmark(mUrl.path(), QUrl(mUrl), QString());
    if (bookManager.save()) {
        bookManager.emitChanged(group);
    }

    return OK;
}

KMUrlSaveCommand::KMUrlSaveCommand(const QUrl &url, QWidget *parent)
    : KMCommand(parent)
    , mUrl(url)
{
}

KMCommand::Result KMUrlSaveCommand::execute()
{
    if (mUrl.isEmpty()) {
        return OK;
    }
    QString recentDirClass;
    QUrl startUrl = KFileWidget::getStartUrl(QUrl(QStringLiteral("kfiledialog:///OpenMessage")), recentDirClass);
    startUrl.setPath(startUrl.path() + QLatin1Char('/') + mUrl.fileName());
    const QUrl saveUrl = QFileDialog::getSaveFileUrl(parentWidget(), i18nc("@title:window", "Save To File"), startUrl);
    if (saveUrl.isEmpty()) {
        return Canceled;
    }

    if (!recentDirClass.isEmpty()) {
        KRecentDirs::add(recentDirClass, saveUrl.adjusted(QUrl::RemoveFilename | QUrl::StripTrailingSlash).path());
    }

    KIO::Job *job = KIO::file_copy(mUrl, saveUrl, -1, KIO::Overwrite);
    connect(job, &KIO::Job::result, this, &KMUrlSaveCommand::slotUrlSaveResult);
    setEmitsCompletedItself(true);
    return OK;
}

void KMUrlSaveCommand::slotUrlSaveResult(KJob *job)
{
    if (job->error()) {
        showJobError(job);
        setResult(Failed);
    } else {
        setResult(OK);
    }
    Q_EMIT completed(this);
}

KMEditMessageCommand::KMEditMessageCommand(QWidget *parent, const std::shared_ptr<KMime::Message> &msg)
    : KMCommand(parent)
    , mMessage(msg)
{
}

KMCommand::Result KMEditMessageCommand::execute()
{
    if (!mMessage) {
        return Failed;
    }

    KMail::Composer *win = KMail::makeComposer();
    bool lastEncrypt = false;
    bool lastSign = false;
    KMail::Util::lastEncryptAndSignState(lastEncrypt, lastSign, mMessage);
    win->setMessage(mMessage, lastSign, lastEncrypt, false, true);
    win->show();
    win->setModified(true);
    return OK;
}

KMEditItemCommand::KMEditItemCommand(QWidget *parent, const Akonadi::Item &msg, bool deleteFromSource)
    : KMCommand(parent, msg)
    , mDeleteFromSource(deleteFromSource)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().fetchAttribute<Akonadi::TransportAttribute>();
    fetchScope().fetchAttribute<Akonadi::SentBehaviourAttribute>();
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMEditItemCommand::~KMEditItemCommand() = default;

KMCommand::Result KMEditItemCommand::execute()
{
    Akonadi::Item item = retrievedMessage();
    if (!item.isValid() || !item.parentCollection().isValid()) {
        return Failed;
    }
    std::shared_ptr<KMime::Message> msg = MessageComposer::Util::message(item);
    if (!msg) {
        return Failed;
    }

    KMail::Composer *win = KMail::makeComposer();
    bool lastEncrypt = false;
    bool lastSign = false;
    KMail::Util::lastEncryptAndSignState(lastEncrypt, lastSign, msg);
    win->setMessage(msg, lastSign, lastEncrypt, false, true);

    win->setFolder(item.parentCollection());

    const auto *transportAttribute = item.attribute<Akonadi::TransportAttribute>();
    if (transportAttribute) {
        win->setCurrentTransport(transportAttribute->transportId());
    } else {
        int transportId = -1;
        if (auto hrd = msg->headerByType("X-KMail-Transport")) {
            transportId = hrd->asUnicodeString().toInt();
        }
        if (transportId != -1) {
            win->setCurrentTransport(transportId);
        }
    }

    const auto *sentAttribute = item.attribute<Akonadi::SentBehaviourAttribute>();
    if (sentAttribute && (sentAttribute->sentBehaviour() == Akonadi::SentBehaviourAttribute::MoveToCollection)) {
        win->setFcc(QString::number(sentAttribute->moveToCollection().id()));
    }
    win->show();

    if (mDeleteFromSource) {
        win->setModified(true);

        setDeletesItself(true);
        setEmitsCompletedItself(true);
        auto job = new Akonadi::ItemDeleteJob(item);
        connect(job, &KIO::Job::result, this, &KMEditItemCommand::slotDeleteItem);
    }

    return OK;
}

void KMEditItemCommand::slotDeleteItem(KJob *job)
{
    if (job->error()) {
        showJobError(job);
        setResult(Failed);
    } else {
        setResult(OK);
    }
    Q_EMIT completed(this);
    deleteLater();
}

KMUseTemplateCommand::KMUseTemplateCommand(QWidget *parent, const Akonadi::Item &msg)
    : KMCommand(parent, msg)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMCommand::Result KMUseTemplateCommand::execute()
{
    Akonadi::Item item = retrievedMessage();
    if (!item.isValid() || !item.parentCollection().isValid() || !CommonKernel->folderIsTemplates(item.parentCollection())) {
        return Failed;
    }
    std::shared_ptr<KMime::Message> msg = MessageComposer::Util::message(item);
    if (!msg) {
        return Failed;
    }

    std::shared_ptr<KMime::Message> newMsg(new KMime::Message);
    newMsg->setContent(msg->encodedContent());
    newMsg->parse();
    // these fields need to be regenerated for the new message
    newMsg->removeHeader<KMime::Headers::Date>();
    newMsg->removeHeader<KMime::Headers::MessageID>();

    KMail::Composer *win = KMail::makeComposer();

    win->setMessage(newMsg, false, false, false, true);
    win->show();
    return OK;
}

KMSaveMsgCommand::KMSaveMsgCommand(QWidget *parent, const Akonadi::Item::List &msgList)
    : KMCommand(parent, msgList)
{
    if (msgList.empty()) {
        return;
    }

    fetchScope().fetchFullPayload(true); // ### unless we call the corresponding KMCommand ctor, this has no effect
}

KMCommand::Result KMSaveMsgCommand::execute()
{
    if (!MessageViewer::Util::saveMessageInMbox(retrievedMsgs(), parentWidget())) {
        return Failed;
    }
    return OK;
}

//-----------------------------------------------------------------------------

KMOpenMsgCommand::KMOpenMsgCommand(QWidget *parent, const QUrl &url, const QString &encoding, KMMainWidget *main)
    : KMCommand(parent)
    , mUrl(url)
    , mEncoding(encoding)
    , mMainWidget(main)
{
    qCDebug(KMAIL_LOG) << "url :" << url;
}

KMCommand::Result KMOpenMsgCommand::execute()
{
    if (mUrl.isEmpty()) {
        mUrl = QFileDialog::getOpenFileUrl(parentWidget(),
                                           i18nc("@title:window", "Open Message"),
                                           QUrl(),
                                           QStringLiteral("%1 (*.mbox *.eml)").arg(i18n("Message")));
    }
    if (mUrl.isEmpty()) {
        return Canceled;
    }

    if (mMainWidget) {
        mMainWidget->addRecentFile(mUrl);
    }

    setDeletesItself(true);
    mJob = KIO::get(mUrl, KIO::NoReload, KIO::HideProgressInfo);
    connect(mJob, &KIO::TransferJob::data, this, &KMOpenMsgCommand::slotDataArrived);
    connect(mJob, &KJob::result, this, &KMOpenMsgCommand::slotResult);
    setEmitsCompletedItself(true);
    return OK;
}

void KMOpenMsgCommand::slotDataArrived(KIO::Job *, const QByteArray &data)
{
    if (data.isEmpty()) {
        return;
    }

    mMsgString.append(data.data());
}

void KMOpenMsgCommand::doesNotContainMessage()
{
    KMessageBox::error(parentWidget(), i18n("The file does not contain a message."));
    setResult(Failed);
    Q_EMIT completed(this);
    // Emulate closing of a secondary window so that KMail exits in case it
    // was started with the --view command line option. Otherwise an
    // invisible KMail would keep running.
    auto win = new SecondaryWindow();
    win->close();
    win->deleteLater();
    deleteLater();
}

void KMOpenMsgCommand::slotResult(KJob *job)
{
    if (job->error()) {
        // handle errors
        showJobError(job);
        setResult(Failed);
    } else {
        if (mMsgString.isEmpty()) {
            qCDebug(KMAIL_LOG) << " Message not found. There is a problem";
            doesNotContainMessage();
            return;
        }
        int startOfMessage = 0;
        if (mMsgString.startsWith("From ")) {
            startOfMessage = mMsgString.indexOf('\n');
            if (startOfMessage == -1) {
                doesNotContainMessage();
                return;
            }
            startOfMessage += 1; // the message starts after the '\n'
        }
        QList<std::shared_ptr<KMime::Message>> listMessages;

        // check for multiple messages in the file
        bool multipleMessages = true;
        int endOfMessage = mMsgString.indexOf("\nFrom ", startOfMessage);
        while (endOfMessage != -1) {
            auto msg = new KMime::Message;
            msg->setContent(KMime::CRLFtoLF(mMsgString.mid(startOfMessage, endOfMessage - startOfMessage)));
            msg->parse();
            if (!msg->hasContent()) {
                delete msg;
                msg = nullptr;
                doesNotContainMessage();
                return;
            }
            std::shared_ptr<KMime::Message> mMsg(msg);
            listMessages << mMsg;
            startOfMessage = endOfMessage + 1;
            endOfMessage = mMsgString.indexOf("\nFrom ", startOfMessage);
        }
        endOfMessage = mMsgString.length();
        multipleMessages = false;
        auto msg = new KMime::Message;
        msg->setContent(KMime::CRLFtoLF(mMsgString.mid(startOfMessage, endOfMessage - startOfMessage)));
        msg->parse();
        if (!msg->hasContent()) {
            delete msg;
            msg = nullptr;
            doesNotContainMessage();
            return;
        }
        std::shared_ptr<KMime::Message> mMsg(msg);
        listMessages << mMsg;
        auto win = new KMReaderMainWin();
        win->showMessage(mEncoding, listMessages);
        win->show();
        if (multipleMessages) {
            KMessageBox::information(win,
                                     i18n("The file contains multiple messages. "
                                          "Only the first message is shown."));
        }
        setResult(OK);
    }
    Q_EMIT completed(this);
    deleteLater();
}

//-----------------------------------------------------------------------------
KMReplyCommand::KMReplyCommand(QWidget *parent,
                               const Akonadi::Item &msg,
                               MessageComposer::ReplyStrategy replyStrategy,
                               const QString &selection,
                               bool noquote,
                               const QString &templateName)
    : KMCommand(parent, msg)
    , mSelection(selection)
    , mTemplate(templateName)
    , m_replyStrategy(replyStrategy)
    , mNoQuote(noquote)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMCommand::Result KMReplyCommand::execute()
{
    KCursorSaver saver(Qt::WaitCursor);
    Akonadi::Item item = retrievedMessage();
    std::shared_ptr<KMime::Message> msg = MessageComposer::Util::message(item);
    if (!msg) {
        return Failed;
    }

    CreateReplyMessageJobSettings settings;
    settings.item = item;
    settings.msg = msg;
    settings.selection = mSelection;
    settings.replyStrategy = m_replyStrategy;
    settings.templateStr = mTemplate;
    settings.noQuote = mNoQuote;
    settings.replyAsHtml = mReplyAsHtml;
    // qDebug() << " settings " << mReplyAsHtml;

    auto job = new CreateReplyMessageJob;
    job->setSettings(settings);
    job->start();

    return OK;
}

bool KMReplyCommand::replyAsHtml() const
{
    return mReplyAsHtml;
}

void KMReplyCommand::setReplyAsHtml(bool replyAsHtml)
{
    mReplyAsHtml = replyAsHtml;
}

KMForwardCommand::KMForwardCommand(QWidget *parent, const Akonadi::Item::List &msgList, uint identity, const QString &templateName, const QString &selection)
    : KMCommand(parent, msgList)
    , mIdentity(identity)
    , mTemplate(templateName)
    , mSelection(selection)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMForwardCommand::KMForwardCommand(QWidget *parent, const Akonadi::Item &msg, uint identity, const QString &templateName, const QString &selection)
    : KMCommand(parent, msg)
    , mIdentity(identity)
    , mTemplate(templateName)
    , mSelection(selection)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMCommand::Result KMForwardCommand::createComposer(const Akonadi::Item &item)
{
    std::shared_ptr<KMime::Message> msg = MessageComposer::Util::message(item);
    if (!msg) {
        return Failed;
    }
    KCursorSaver saver(Qt::WaitCursor);

    CreateForwardMessageJobSettings settings;
    settings.item = item;
    settings.msg = msg;
    settings.identity = mIdentity;
    settings.templateStr = mTemplate;
    settings.selection = mSelection;

    auto job = new CreateForwardMessageJob;
    job->setSettings(settings);
    job->start();
    return OK;
}

KMCommand::Result KMForwardCommand::execute()
{
    Akonadi::Item::List msgList = retrievedMsgs();

    if (msgList.count() >= 2) {
        // ask if they want a mime digest forward

        int answer = KMessageBox::questionTwoActionsCancel(parentWidget(),
                                                           i18n("Do you want to forward the selected messages as "
                                                                "attachments in one message (as a MIME digest) or as "
                                                                "individual messages?"),
                                                           QString(),
                                                           KGuiItem(i18nc("@action:button", "Send As Digest")),
                                                           KGuiItem(i18nc("@action:button", "Send Individually")));

        if (answer == KMessageBox::ButtonCode::PrimaryAction) {
            Akonadi::Item firstItem(msgList.first());
            MessageFactoryNG factory(std::shared_ptr<KMime::Message>(new KMime::Message),
                                     firstItem.id(),
                                     CommonKernel->collectionFromId(firstItem.parentCollection().id()));
            factory.setIdentityManager(KMKernel::self()->identityManager());
            factory.setFolderIdentity(MailCommon::Util::folderIdentity(firstItem));

            const auto fwdMsg = factory.createForwardDigestMIME(msgList);
            KMail::Composer *win = KMail::makeComposer(fwdMsg.first, false, false, KMail::Composer::TemplateContext::Forward, mIdentity);
            win->addAttach(fwdMsg.second.get());
            win->show();
            return OK;
        } else if (answer == KMessageBox::ButtonCode::SecondaryAction) { // NO MIME DIGEST, Multiple forward
            Akonadi::Item::List::const_iterator it;
            Akonadi::Item::List::const_iterator end(msgList.constEnd());

            for (it = msgList.constBegin(); it != end; ++it) {
                if (createComposer(*it) == Failed) {
                    return Failed;
                }
            }
            return OK;
        } else {
            // user cancelled
            return OK;
        }
    }

    // forward a single message at most.
    Akonadi::Item item = msgList.first();
    if (createComposer(item) == Failed) {
        return Failed;
    }
    return OK;
}

KMForwardAttachedCommand::KMForwardAttachedCommand(QWidget *parent, const Akonadi::Item::List &msgList, uint identity, KMail::Composer *win)
    : KMCommand(parent, msgList)
    , mIdentity(identity)
    , mWin(QPointer<KMail::Composer>(win))
{
    fetchScope().fetchFullPayload(true);
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMForwardAttachedCommand::KMForwardAttachedCommand(QWidget *parent, const Akonadi::Item &msg, uint identity, KMail::Composer *win)
    : KMCommand(parent, msg)
    , mIdentity(identity)
    , mWin(QPointer<KMail::Composer>(win))
{
    fetchScope().fetchFullPayload(true);
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMCommand::Result KMForwardAttachedCommand::execute()
{
    Akonadi::Item::List msgList = retrievedMsgs();
    Akonadi::Item firstItem(msgList.first());
    MessageFactoryNG factory(std::shared_ptr<KMime::Message>(new KMime::Message),
                             firstItem.id(),
                             CommonKernel->collectionFromId(firstItem.parentCollection().id()));
    factory.setIdentityManager(KMKernel::self()->identityManager());
    factory.setFolderIdentity(MailCommon::Util::folderIdentity(firstItem));

    const auto fwdMsg = factory.createAttachedForward(msgList);
    if (!mWin) {
        mWin = KMail::makeComposer(fwdMsg.first, false, false, KMail::Composer::TemplateContext::Forward, mIdentity);
    }
    for (const auto &attach : fwdMsg.second) {
        mWin->addAttach(attach.get());
    }
    mWin->show();
    return OK;
}

KMRedirectCommand::KMRedirectCommand(QWidget *parent, const Akonadi::Item::List &msgList)
    : KMCommand(parent, msgList)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().fetchAttribute<Akonadi::SentBehaviourAttribute>();
    fetchScope().fetchAttribute<Akonadi::TransportAttribute>();

    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMRedirectCommand::KMRedirectCommand(QWidget *parent, const Akonadi::Item &msg)
    : KMCommand(parent, msg)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().fetchAttribute<Akonadi::SentBehaviourAttribute>();
    fetchScope().fetchAttribute<Akonadi::TransportAttribute>();

    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMCommand::Result KMRedirectCommand::execute()
{
    const MailCommon::RedirectDialog::SendMode sendMode =
        MessageComposer::MessageComposerSettings::self()->sendImmediate() ? MailCommon::RedirectDialog::SendNow : MailCommon::RedirectDialog::SendLater;

    QScopedPointer<MailCommon::RedirectDialog> dlg(new MailCommon::RedirectDialog(sendMode, parentWidget()));
    dlg->setObjectName("redirect"_L1);
    if (dlg->exec() == QDialog::Rejected) {
        return Failed;
    }
    if (!TransportManager::self()->showTransportCreationDialog(parentWidget(), TransportManager::IfNoTransportExists)) {
        return Failed;
    }

    // TODO use sendlateragent here too.
    const MessageComposer::MessageSender::SendMethod method =
        (dlg->sendMode() == MailCommon::RedirectDialog::SendNow) ? MessageComposer::MessageSender::SendImmediate : MessageComposer::MessageSender::SendLater;

    const int identity = dlg->identity();
    int transportId = dlg->transportId();
    const QString to = dlg->to();
    const QString cc = dlg->cc();
    const QString bcc = dlg->bcc();
    const Akonadi::Item::List lstItems = retrievedMsgs();
    for (const Akonadi::Item &item : lstItems) {
        const std::shared_ptr<KMime::Message> msg = MessageComposer::Util::message(item);
        if (!msg) {
            return Failed;
        }
        MessageFactoryNG factory(msg, item.id(), CommonKernel->collectionFromId(item.parentCollection().id()));
        factory.setIdentityManager(KMKernel::self()->identityManager());
        factory.setFolderIdentity(MailCommon::Util::folderIdentity(item));

        if (transportId == -1) {
            const auto transportAttribute = item.attribute<Akonadi::TransportAttribute>();
            if (transportAttribute) {
                transportId = transportAttribute->transportId();
                const MailTransport::Transport *transport = MailTransport::TransportManager::self()->transportById(transportId);
                if (!transport) {
                    transportId = -1;
                }
            }
        }

        const auto sentAttribute = item.attribute<Akonadi::SentBehaviourAttribute>();
        QString fcc;
        if (sentAttribute && (sentAttribute->sentBehaviour() == Akonadi::SentBehaviourAttribute::MoveToCollection)) {
            fcc = QString::number(sentAttribute->moveToCollection().id());
        }

        const std::shared_ptr<KMime::Message> newMsg = factory.createRedirect(to, cc, bcc, transportId, fcc, identity);
        if (!newMsg) {
            return Failed;
        }

        MessageStatus status;
        status.setStatusFromFlags(item.flags());
        if (!status.isRead()) {
            FilterAction::sendMDN(item, KMime::MDN::Dispatched);
        }

        if (!kmkernel->msgSender()->send(newMsg, method)) {
            qCDebug(KMAIL_LOG) << "KMRedirectCommand: could not redirect message (sending failed)";
            return Failed; // error: couldn't send
        }
    }

    return OK;
}

KMPrintCommand::KMPrintCommand(QWidget *parent, const KMPrintCommandInfo &commandInfo)
    : KMCommand(parent, commandInfo.mMsg)
    , mPrintCommandInfo(commandInfo)
{
    fetchScope().fetchFullPayload(true);
    if (MessageCore::MessageCoreSettings::useDefaultFonts()) {
        mPrintCommandInfo.mOverrideFont = QFontDatabase::systemFont(QFontDatabase::GeneralFont);
    } else {
        mPrintCommandInfo.mOverrideFont = MessageViewer::MessageViewerSettings::self()->printFont();
    }
}

KMCommand::Result KMPrintCommand::execute()
{
    auto printerWin = new KMReaderWin(nullptr, parentWidget(), nullptr);
    printerWin->setPrinting(true);
    printerWin->readConfig();
    printerWin->setPrintElementBackground(MessageViewer::MessageViewerSettings::self()->printBackgroundColorImages());
    if (mPrintCommandInfo.mHeaderStylePlugin) {
        printerWin->viewer()->setPluginName(mPrintCommandInfo.mHeaderStylePlugin->name());
    }
    printerWin->setDisplayFormatMessageOverwrite(mPrintCommandInfo.mFormat);
    printerWin->setHtmlLoadExtOverride(mPrintCommandInfo.mHtmlLoadExtOverride);
    printerWin->setUseFixedFont(mPrintCommandInfo.mUseFixedFont);
    printerWin->setOverrideEncoding(mPrintCommandInfo.mEncoding);
    printerWin->cssHelper()->setPrintFont(mPrintCommandInfo.mOverrideFont);
    printerWin->setDecryptMessageOverwrite(true);
    if (mPrintCommandInfo.mAttachmentStrategy) {
        printerWin->setAttachmentStrategy(mPrintCommandInfo.mAttachmentStrategy);
    }
    printerWin->viewer()->setShowSignatureDetails(mPrintCommandInfo.mShowSignatureDetails);
    printerWin->viewer()->setShowEncryptionDetails(mPrintCommandInfo.mShowEncryptionDetails);
    if (mPrintCommandInfo.mPrintPreview) {
        printerWin->viewer()->printPreviewMessage(retrievedMessage());
    } else {
        printerWin->viewer()->printMessage(retrievedMessage());
    }
    return OK;
}

KMSetStatusCommand::KMSetStatusCommand(const MessageStatus &status, const Akonadi::Item::List &items, bool invert)
    : KMCommand(nullptr, items)
    , mStatus(status)
    , mInvertMark(invert)
{
    setDeletesItself(true);
}

KMCommand::Result KMSetStatusCommand::execute()
{
    bool parentStatus = false;
    // Toggle actions on threads toggle the whole thread
    // depending on the state of the parent.
    if (mInvertMark) {
        const Akonadi::Item first = retrievedMsgs().first();
        MessageStatus pStatus;
        pStatus.setStatusFromFlags(first.flags());
        if (pStatus & mStatus) {
            parentStatus = true;
        } else {
            parentStatus = false;
        }
    }

    Akonadi::Item::List itemsToModify;
    const Akonadi::Item::List lstItems = retrievedMsgs();
    for (const Akonadi::Item &it : lstItems) {
        if (mInvertMark) {
            // qCDebug(KMAIL_LOG)<<" item ::"<<tmpItem;
            if (it.isValid()) {
                bool myStatus;
                MessageStatus itemStatus;
                itemStatus.setStatusFromFlags(it.flags());
                if (itemStatus & mStatus) {
                    myStatus = true;
                } else {
                    myStatus = false;
                }
                if (myStatus != parentStatus) {
                    continue;
                }
            }
        }
        Akonadi::Item item(it);
        const Akonadi::Item::Flag flag = *(mStatus.statusFlags().constBegin());
        if (mInvertMark) {
            if (item.hasFlag(flag)) {
                item.clearFlag(flag);
                itemsToModify.push_back(item);
            } else {
                item.setFlag(flag);
                itemsToModify.push_back(item);
            }
        } else {
            if (!item.hasFlag(flag)) {
                item.setFlag(flag);
                itemsToModify.push_back(item);
            }
        }
    }

    if (itemsToModify.isEmpty()) {
        slotModifyItemDone(nullptr); // pretend we did something
    } else {
        auto modifyJob = new Akonadi::ItemModifyJob(itemsToModify, this);
        modifyJob->disableRevisionCheck();
        modifyJob->setIgnorePayload(true);
        connect(modifyJob, &Akonadi::ItemModifyJob::result, this, &KMSetStatusCommand::slotModifyItemDone);
    }
    return OK;
}

void KMSetStatusCommand::slotModifyItemDone(KJob *job)
{
    if (job && job->error()) {
        qCWarning(KMAIL_LOG) << " Error trying to set item status:" << job->errorText();
    }
    deleteLater();
}

KMSetTagCommand::KMSetTagCommand(const Akonadi::Tag::List &tags, const Akonadi::Item::List &item, SetTagMode mode)
    : mTags(tags)
    , mItem(item)
    , mMode(mode)
{
    setDeletesItself(true);
}

KMCommand::Result KMSetTagCommand::execute()
{
    for (const Akonadi::Tag &tag : std::as_const(mTags)) {
        if (!tag.isValid()) {
            auto createJob = new Akonadi::TagCreateJob(tag, this);
            connect(createJob, &Akonadi::TagCreateJob::result, this, &KMSetTagCommand::slotModifyItemDone);
        } else {
            mCreatedTags << tag;
        }
    }

    if (mCreatedTags.size() == mTags.size()) {
        setTags();
    } else {
        deleteLater();
    }

    return OK;
}

void KMSetTagCommand::setTags()
{
    Akonadi::Item::List itemsToModify;
    itemsToModify.reserve(mItem.count());
    for (const Akonadi::Item &i : std::as_const(mItem)) {
        Akonadi::Item item(i);
        if (mMode == CleanExistingAndAddNew) {
            // WorkAround. ClearTags doesn't work.
            const Akonadi::Tag::List lstTags = item.tags();
            for (const Akonadi::Tag &tag : lstTags) {
                item.clearTag(tag);
            }
            // item.clearTags();
        }

        if (mMode == KMSetTagCommand::Toggle) {
            for (const Akonadi::Tag &tag : std::as_const(mCreatedTags)) {
                if (item.hasTag(tag)) {
                    item.clearTag(tag);
                } else {
                    item.setTag(tag);
                }
            }
        } else {
            if (!mCreatedTags.isEmpty()) {
                item.setTags(mCreatedTags);
            }
        }
        itemsToModify << item;
    }
    auto modifyJob = new Akonadi::ItemModifyJob(itemsToModify, this);
    modifyJob->disableRevisionCheck();
    modifyJob->setIgnorePayload(true);
    connect(modifyJob, &Akonadi::ItemModifyJob::result, this, &KMSetTagCommand::slotModifyItemDone);

    if (!mCreatedTags.isEmpty()) {
        KConfigGroup tag(KMKernel::self()->config(), QStringLiteral("MessageListView"));
        const QString oldTagList = tag.readEntry("TagSelected");
        QStringList lst = oldTagList.split(QLatin1Char(','));
        for (const Akonadi::Tag &createdTag : std::as_const(mCreatedTags)) {
            const QString url = createdTag.url().url();
            if (!lst.contains(url)) {
                lst.append(url);
            }
        }
        tag.writeEntry("TagSelected", lst);
        KMKernel::self()->updatePaneTagComboBox();
    }
}

void KMSetTagCommand::slotModifyItemDone(KJob *job)
{
    if (job && job->error()) {
        qCWarning(KMAIL_LOG) << " Error trying to set item status:" << job->errorText();
    }
    deleteLater();
}

KMFilterActionCommand::KMFilterActionCommand(QWidget *parent, const QList<qlonglong> &msgListId, const QString &filterId)
    : KMCommand(parent)
    , mMsgListId(msgListId)
    , mFilterId(filterId)
{
}

KMCommand::Result KMFilterActionCommand::execute()
{
    KCursorSaver saver(Qt::WaitCursor);
    int msgCount = 0;
    const int msgCountToFilter = mMsgListId.count();
    ProgressItem *progressItem = ProgressManager::createProgressItem("filter"_L1 + ProgressManager::getUniqueID(),
                                                                     i18n("Filtering messages"),
                                                                     QString(),
                                                                     true,
                                                                     KPIM::ProgressItem::Unknown);
    progressItem->setTotalItems(msgCountToFilter);

    for (const qlonglong &id : std::as_const(mMsgListId)) {
        int diff = msgCountToFilter - ++msgCount;
        if (diff < 10 || !(msgCount % 10) || msgCount <= 10) {
            progressItem->updateProgress();
            const QString statusMsg = i18n("Filtering message %1 of %2", msgCount, msgCountToFilter);
            PimCommon::BroadcastStatus::instance()->setStatusMsg(statusMsg);
            qApp->processEvents(QEventLoop::ExcludeUserInputEvents, 50);
        }

        MailCommon::FilterManager::instance()->filter(Akonadi::Item(id), mFilterId, QString());
        progressItem->incCompletedItems();
    }

    progressItem->setComplete();
    progressItem = nullptr;
    return OK;
}

KMMetaFilterActionCommand::KMMetaFilterActionCommand(const QString &filterId, KMMainWidget *main)
    : QObject(main)
    , mFilterId(filterId)
    , mMainWidget(main)
{
}

void KMMetaFilterActionCommand::start()
{
    KMCommand *filterCommand = new KMFilterActionCommand(mMainWidget, mMainWidget->messageListPane()->selectionAsMessageItemListId(), mFilterId);
    filterCommand->start();
}

KMMailingListFilterCommand::KMMailingListFilterCommand(QWidget *parent, const Akonadi::Item &msg)
    : KMCommand(parent, msg)
{
}

KMCommand::Result KMMailingListFilterCommand::execute()
{
    QByteArray name;
    QString value;
    Akonadi::Item item = retrievedMessage();
    std::shared_ptr<KMime::Message> msg = MessageComposer::Util::message(item);
    if (!msg) {
        return Failed;
    }
    if (!MailingList::name(msg, name, value).isEmpty()) {
        FilterIf->openFilterDialog(false);
        FilterIf->createFilter(name, value);
        return OK;
    } else {
        return Failed;
    }
}

KMCopyCommand::KMCopyCommand(const Akonadi::Collection &destFolder, const Akonadi::Item::List &msgList)
    : KMCommand(nullptr, msgList)
    , mDestFolder(destFolder)
{
}

KMCopyCommand::KMCopyCommand(const Akonadi::Collection &destFolder, const Akonadi::Item &msg)
    : KMCommand(nullptr, msg)
    , mDestFolder(destFolder)
{
}

KMCommand::Result KMCopyCommand::execute()
{
    setDeletesItself(true);

    Akonadi::Item::List listItem = retrievedMsgs();
    auto job = new Akonadi::ItemCopyJob(listItem, Akonadi::Collection(mDestFolder.id()), this);
    connect(job, &KIO::Job::result, this, &KMCopyCommand::slotCopyResult);

    return OK;
}

void KMCopyCommand::slotCopyResult(KJob *job)
{
    if (job->error()) {
        // handle errors
        showJobError(job);
        setResult(Failed);
    }

    qobject_cast<Akonadi::ItemCopyJob *>(job);

    Q_EMIT completed(this);
    deleteLater();
}

KMCopyDecryptedCommand::KMCopyDecryptedCommand(const Akonadi::Collection &destFolder, const Akonadi::Item::List &msgList)
    : KMCommand(nullptr, msgList)
    , mDestFolder(destFolder)
{
    fetchScope().fetchAllAttributes();
    fetchScope().fetchFullPayload();
}

KMCopyDecryptedCommand::KMCopyDecryptedCommand(const Akonadi::Collection &destFolder, const Akonadi::Item &msg)
    : KMCopyDecryptedCommand(destFolder, Akonadi::Item::List{msg})
{
}

KMCommand::Result KMCopyDecryptedCommand::execute()
{
    setDeletesItself(true);

    const auto items = retrievedMsgs();
    for (const auto &item : items) {
        // Decrypt
        if (!item.hasPayload<std::shared_ptr<KMime::Message>>()) {
            continue;
        }
        const auto msg = item.payload<std::shared_ptr<KMime::Message>>();
        bool wasEncrypted;
        auto decMsg = MailCommon::CryptoUtils::decryptMessage(msg, wasEncrypted);
        if (!wasEncrypted) {
            decMsg = msg;
        }

        Akonadi::Item decItem;
        decItem.setMimeType(KMime::Message::mimeType());
        decItem.setPayload(decMsg);

        auto job = new Akonadi::ItemCreateJob(decItem, mDestFolder, this);
        connect(job, &Akonadi::Job::result, this, &KMCopyDecryptedCommand::slotAppendResult);
        mPendingJobs << job;
    }

    if (mPendingJobs.isEmpty()) {
        Q_EMIT completed(this);
        deleteLater();
    }

    return KMCommand::OK;
}

void KMCopyDecryptedCommand::slotAppendResult(KJob *job)
{
    mPendingJobs.removeOne(job);
    if (mPendingJobs.isEmpty()) {
        Q_EMIT completed(this);
        deleteLater();
    }
}

KMMoveCommand::KMMoveCommand(const Akonadi::Collection &destFolder, const Akonadi::Item::List &msgList, MessageList::Core::MessageItemSetReference ref)
    : KMCommand(nullptr, msgList)
    , mDestFolder(destFolder)
    , mRef(ref)
{
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMMoveCommand::KMMoveCommand(const Akonadi::Collection &destFolder, const Akonadi::Item &msg, MessageList::Core::MessageItemSetReference ref)
    : KMCommand(nullptr, msg)
    , mDestFolder(destFolder)
    , mRef(ref)
{
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

void KMMoveCommand::slotMoveResult(KJob *job)
{
    if (job->error()) {
        // handle errors
        showJobError(job);
        completeMove(Failed);
    } else {
        completeMove(OK);
    }
}

KMCommand::Result KMMoveCommand::execute()
{
    KCursorSaver saver(Qt::WaitCursor);
    setEmitsCompletedItself(true);
    setDeletesItself(true);
    Akonadi::Item::List retrievedList = retrievedMsgs();
    if (!retrievedList.isEmpty()) {
        if (mDestFolder.isValid()) {
            auto job = new Akonadi::ItemMoveJob(retrievedList, mDestFolder, this);
            connect(job, &KIO::Job::result, this, &KMMoveCommand::slotMoveResult);

            // group by source folder for undo
            std::sort(retrievedList.begin(), retrievedList.end(), [](const Akonadi::Item &lhs, const Akonadi::Item &rhs) {
                return lhs.storageCollectionId() < rhs.storageCollectionId();
            });
            Akonadi::Collection parent;
            int undoId = -1;
            for (const Akonadi::Item &item : std::as_const(retrievedList)) {
                if (!item.isValid() || item.storageCollectionId() == -1) {
                    continue;
                }
                if (parent.id() != item.storageCollectionId()) {
                    parent = Akonadi::Collection(item.storageCollectionId());
                    undoId = kmkernel->undoStack()->newUndoAction(parent, mDestFolder);
                }
                kmkernel->undoStack()->addMsgToAction(undoId, item);
            }
        } else {
            auto job = new Akonadi::ItemDeleteJob(retrievedList, this);
            connect(job, &KIO::Job::result, this, &KMMoveCommand::slotMoveResult);
        }
    } else {
        deleteLater();
        return Failed;
    }
    // TODO set SSL state according to source and destfolder connection?
    Q_ASSERT(!mProgressItem);
    mProgressItem = ProgressManager::createProgressItem("move"_L1 + ProgressManager::getUniqueID(),
                                                        mDestFolder.isValid() ? i18n("Moving messages") : i18n("Deleting messages"),
                                                        QString(),
                                                        true,
                                                        KPIM::ProgressItem::Unknown);
    mProgressItem->setUsesBusyIndicator(true);
    connect(mProgressItem, &ProgressItem::progressItemCanceled, this, &KMMoveCommand::slotMoveCanceled);
    return OK;
}

void KMMoveCommand::completeMove(Result result)
{
    if (mProgressItem) {
        mProgressItem->setComplete();
        mProgressItem = nullptr;
    }
    setResult(result);
    Q_EMIT moveDone(this);
    Q_EMIT completed(this);
    deleteLater();
}

void KMMoveCommand::slotMoveCanceled()
{
    completeMove(Canceled);
}

KMTrashMsgCommand::KMTrashMsgCommand(const Akonadi::Collection &srcFolder, const Akonadi::Item::List &msgList, MessageList::Core::MessageItemSetReference ref)
    : mRef(ref)
{
    // When trashing items from a virtual collection, they may each have a different
    // trash folder, so we need to handle it here carefully
    if (srcFolder.isVirtual()) {
        QHash<qint64, Akonadi::Collection> cache;
        for (const auto &msg : msgList) {
            auto cacheIt = cache.find(msg.storageCollectionId());
            if (cacheIt == cache.end()) {
                cacheIt = cache.insert(msg.storageCollectionId(), findTrashFolder(CommonKernel->collectionFromId(msg.storageCollectionId())));
            }
            auto trashIt = mTrashFolders.find(*cacheIt);
            if (trashIt == mTrashFolders.end()) {
                trashIt = mTrashFolders.insert(*cacheIt, {});
            }
            trashIt->push_back(msg);
        }
    } else {
        mTrashFolders.insert(findTrashFolder(srcFolder), msgList);
    }
}

KMTrashMsgCommand::TrashOperation KMTrashMsgCommand::operation() const
{
    if (!mPendingMoves.isEmpty() && !mPendingDeletes.isEmpty()) {
        return Both;
    } else if (!mPendingMoves.isEmpty()) {
        return MoveToTrash;
    } else if (!mPendingDeletes.isEmpty()) {
        return Delete;
    } else {
        if (mTrashFolders.size() == 1) {
            if (mTrashFolders.begin().key().isValid()) {
                return MoveToTrash;
            } else {
                return Delete;
            }
        } else {
            return Unknown;
        }
    }
}

KMTrashMsgCommand::KMTrashMsgCommand(const Akonadi::Collection &srcFolder, const Akonadi::Item &msg, MessageList::Core::MessageItemSetReference ref)
    : KMTrashMsgCommand(srcFolder, Akonadi::Item::List{msg}, ref)
{
}

Akonadi::Collection KMTrashMsgCommand::findTrashFolder(const Akonadi::Collection &folder)
{
    Akonadi::Collection col = CommonKernel->trashCollectionFromResource(folder);
    if (!col.isValid()) {
        col = CommonKernel->trashCollectionFolder();
    }
    if (folder != col) {
        return col;
    }
    return {};
}

KMCommand::Result KMTrashMsgCommand::execute()
{
    KCursorSaver saver(Qt::WaitCursor);
    setEmitsCompletedItself(true);
    setDeletesItself(true);
    for (auto trashIt = mTrashFolders.begin(), end = mTrashFolders.end(); trashIt != end; ++trashIt) {
        const auto trash = trashIt.key();
        if (trash.isValid()) {
            auto job = new Akonadi::ItemMoveJob(*trashIt, trash, this);
            connect(job, &KIO::Job::result, this, &KMTrashMsgCommand::slotMoveResult);
            mPendingMoves.push_back(job);

            // group by source folder for undo
            std::sort(trashIt->begin(), trashIt->end(), [](const Akonadi::Item &lhs, const Akonadi::Item &rhs) {
                return lhs.storageCollectionId() < rhs.storageCollectionId();
            });
            Akonadi::Collection parent;
            int undoId = -1;
            for (const Akonadi::Item &item : std::as_const(*trashIt)) {
                if (!item.isValid() || item.storageCollectionId() == -1) {
                    continue;
                }
                if (parent.id() != item.storageCollectionId()) {
                    parent = Akonadi::Collection(item.storageCollectionId());
                    undoId = kmkernel->undoStack()->newUndoAction(parent, trash);
                }
                kmkernel->undoStack()->addMsgToAction(undoId, item);
            }
        } else {
            auto job = new Akonadi::ItemDeleteJob(*trashIt, this);
            connect(job, &KIO::Job::result, this, &KMTrashMsgCommand::slotDeleteResult);
            mPendingDeletes.push_back(job);
        }
    }

    if (mPendingMoves.isEmpty() && mPendingDeletes.isEmpty()) {
        deleteLater();
        return Failed;
    }

    // TODO set SSL state according to source and destfolder connection?
    if (!mPendingMoves.isEmpty()) {
        Q_ASSERT(!mMoveProgress);
        mMoveProgress = ProgressManager::createProgressItem("move"_L1 + ProgressManager::getUniqueID(),
                                                            i18n("Moving messages"),
                                                            QString(),
                                                            true,
                                                            KPIM::ProgressItem::Unknown);
        mMoveProgress->setUsesBusyIndicator(true);
        connect(mMoveProgress, &ProgressItem::progressItemCanceled, this, &KMTrashMsgCommand::slotMoveCanceled);
    }
    if (!mPendingDeletes.isEmpty()) {
        Q_ASSERT(!mDeleteProgress);
        mDeleteProgress = ProgressManager::createProgressItem("delete"_L1 + ProgressManager::getUniqueID(),
                                                              i18n("Deleting messages"),
                                                              QString(),
                                                              true,
                                                              KPIM::ProgressItem::Unknown);
        mDeleteProgress->setUsesBusyIndicator(true);
        connect(mDeleteProgress, &ProgressItem::progressItemCanceled, this, &KMTrashMsgCommand::slotMoveCanceled);
    }
    return OK;
}

void KMTrashMsgCommand::slotMoveResult(KJob *job)
{
    mPendingMoves.removeOne(job);
    if (job->error()) {
        // handle errors
        showJobError(job);
        completeMove(Failed);
    } else if (mPendingMoves.isEmpty() && mPendingDeletes.isEmpty()) {
        completeMove(OK);
    }
}

void KMTrashMsgCommand::slotDeleteResult(KJob *job)
{
    mPendingDeletes.removeOne(job);
    if (job->error()) {
        showJobError(job);
        completeMove(Failed);
    } else if (mPendingDeletes.isEmpty() && mPendingMoves.isEmpty()) {
        completeMove(OK);
    }
}

void KMTrashMsgCommand::slotMoveCanceled()
{
    completeMove(Canceled);
}

void KMTrashMsgCommand::completeMove(KMCommand::Result result)
{
    if (result == Failed) {
        for (auto job : std::as_const(mPendingMoves)) {
            job->kill();
        }
        for (auto job : std::as_const(mPendingDeletes)) {
            job->kill();
        }
    }

    if (mDeleteProgress) {
        mDeleteProgress->setComplete();
        mDeleteProgress = nullptr;
    }
    if (mMoveProgress) {
        mMoveProgress->setComplete();
        mMoveProgress = nullptr;
    }

    setResult(result);
    Q_EMIT moveDone(this);
    Q_EMIT completed(this);
    deleteLater();
}

KMSaveAttachmentsCommand::KMSaveAttachmentsCommand(QWidget *parent, const Akonadi::Item &msg, MessageViewer::Viewer *viewer)
    : KMCommand(parent, msg)
    , mViewer(viewer)
{
    fetchScope().fetchFullPayload(true);
}

KMSaveAttachmentsCommand::KMSaveAttachmentsCommand(QWidget *parent, const Akonadi::Item::List &msgs, MessageViewer::Viewer *viewer)
    : KMCommand(parent, msgs)
    , mViewer(viewer)
{
    fetchScope().fetchFullPayload(true);
}

KMCommand::Result KMSaveAttachmentsCommand::execute()
{
    QList<KMime::Content *> contentsToSave;
    const Akonadi::Item::List lstItems = retrievedMsgs();
    for (const Akonadi::Item &item : lstItems) {
        if (item.hasPayload<std::shared_ptr<KMime::Message>>()) {
            contentsToSave += item.payload<std::shared_ptr<KMime::Message>>()->attachments();
        } else {
            qCWarning(KMAIL_LOG) << "Retrieved item has no payload? Ignoring for saving the attachments";
        }
    }
    QList<QUrl> urlList;
    if (MessageViewer::Util::saveAttachments(contentsToSave, parentWidget(), urlList)) {
        if (mViewer) {
            mViewer->showOpenAttachmentFolderWidget(urlList);
        }
        return OK;
    }
    return Failed;
}

KMDeleteAttachmentsCommand::KMDeleteAttachmentsCommand(QWidget *parent, const Akonadi::Item::List &msgs)
    : KMCommand(parent, msgs)
{
    fetchScope().fetchFullPayload(true);
}

KMCommand::Result KMDeleteAttachmentsCommand::execute()
{
    setEmitsCompletedItself(true);
    setDeletesItself(true);

    for (const auto &item : retrievedMsgs()) {
        if (!item.hasPayload<std::shared_ptr<KMime::Message>>()) {
            qCWarning(KMAIL_LOG) << "Retrieved Item" << item.id() << "does not have KMime::Message payload, ignoring.";
            continue;
        }

        auto message = item.payload<std::shared_ptr<KMime::Message>>();
        const auto attachments = message->attachments();
        if (!attachments.empty()) {
            if (const auto actuallyDeleted = MessageViewer::Util::deleteAttachments(attachments); actuallyDeleted > 0) {
                qCDebug(KMAIL_LOG) << "Deleted" << actuallyDeleted << "attachments from message" << item.id() << "(out of" << attachments.size()
                                   << "attachments found)";
                Akonadi::Item updateItem(item);
                updateItem.setPayloadFromData(message->encodedContent());
                updateItem.setRemoteId(QString()); // clear remoteID as we will be re-uploading the message
                auto job = new Akonadi::ItemModifyJob(updateItem, this);
                job->disableRevisionCheck();
                connect(job, &Akonadi::ItemModifyJob::finished, this, &KMDeleteAttachmentsCommand::slotUpdateResult);
                mRunningJobs.push_back(job);
            } else {
                qCDebug(KMAIL_LOG) << "Message" << item.id() << "not modified - no attachments were actually deleted"
                                   << "(out of" << attachments.size() << "attachments found)";
            }
        } else {
            qCDebug(KMAIL_LOG) << "Message" << item.id() << "has no attachments to delete, skipping";
        }
    }

    qCDebug(KMAIL_LOG) << mRunningJobs.size() << "Items now pending update after deleting attachments";

    if (!mRunningJobs.empty()) {
        mProgressItem = ProgressManager::createProgressItem("deleteAttachments"_L1 + ProgressManager::getUniqueID(),
                                                            i18nc("@info:progress", "Deleting Attachments"),
                                                            QString(),
                                                            true,
                                                            KPIM::ProgressItem::Unknown);
        mProgressItem->setTotalItems(mRunningJobs.size());
        connect(mProgressItem, &ProgressItem::progressItemCanceled, this, &KMDeleteAttachmentsCommand::slotCanceled);
    } else {
        complete(OK);
    }

    return OK;
}

void KMDeleteAttachmentsCommand::slotCanceled()
{
    for (auto job : std::as_const(mRunningJobs)) {
        job->kill();
    }
    complete(KMCommand::Canceled);
}

void KMDeleteAttachmentsCommand::slotUpdateResult(KJob *job)
{
    mRunningJobs.removeOne(job);

    if (mProgressItem) {
        mProgressItem->setCompletedItems(mProgressItem->completedItems() + 1);
    }

    if (job->error()) {
        showJobError(job);
        complete(Failed);
    } else if (mRunningJobs.empty()) {
        complete(OK);
    }
}

void KMDeleteAttachmentsCommand::complete(KMCommand::Result result)
{
    if (mProgressItem) {
        mProgressItem->setComplete();
        mProgressItem = nullptr;
    }

    qCDebug(KMAIL_LOG) << "Deleting attachments completed with result" << result;
    setResult(result);
    Q_EMIT completed(this);
    deleteLater();
}

KMResendMessageCommand::KMResendMessageCommand(QWidget *parent, const Akonadi::Item &msg)
    : KMCommand(parent, msg)
{
    fetchScope().fetchFullPayload(true);
    fetchScope().setAncestorRetrieval(Akonadi::ItemFetchScope::Parent);
}

KMCommand::Result KMResendMessageCommand::execute()
{
    Akonadi::Item item = retrievedMessage();
    std::shared_ptr<KMime::Message> msg = MessageComposer::Util::message(item);
    if (!msg) {
        return Failed;
    }
    MessageFactoryNG factory(msg, item.id(), CommonKernel->collectionFromId(item.parentCollection().id()));
    factory.setIdentityManager(KMKernel::self()->identityManager());
    factory.setFolderIdentity(MailCommon::Util::folderIdentity(item));
    std::shared_ptr<KMime::Message> newMsg = factory.createResend();
    newMsg->contentType()->setCharset(MimeTreeParser::NodeHelper::charset(msg.get()));

    KMail::Composer *win = KMail::makeComposer();
    bool lastEncrypt = false;
    bool lastSign = false;
    KMail::Util::lastEncryptAndSignState(lastEncrypt, lastSign, msg);
    win->setMessage(newMsg, lastSign, lastEncrypt, false, true);

    // Make sure to use current folder as requested by David
    // We avoid to use an invalid folder when we open an email on two different computer.
    win->setFcc(QString::number(item.parentCollection().id()));
    win->show();

    return OK;
}

KMShareImageCommand::KMShareImageCommand(const QUrl &url, QWidget *parent)
    : KMCommand(parent)
    , mUrl(url)
{
}

KMCommand::Result KMShareImageCommand::execute()
{
    std::shared_ptr<KMime::Message> msg(new KMime::Message);
    uint id = 0;

    MessageHelper::initHeader(msg, KMKernel::self()->identityManager(), id);
    // Already defined in MessageHelper::initHeader
    msg->contentType(KMime::CreatePolicy::DontCreate)->setCharset(QByteArrayLiteral("utf-8"));

    KMail::Composer *win = KMail::makeComposer(msg, false, false, KMail::Composer::TemplateContext::New, id);
    win->setFocusToSubject();
    QList<KMail::Composer::AttachmentInfo> infoList;
    KMail::Composer::AttachmentInfo info;
    info.url = mUrl;
    info.comment = i18n("Image");
    infoList.append(std::move(info));
    win->addAttachment(infoList, false);
    win->show();
    return OK;
}

KMFetchMessageCommand::KMFetchMessageCommand(QWidget *parent, const Akonadi::Item &item, MessageViewer::Viewer *viewer, KMReaderMainWin *win)
    : KMCommand(parent, item)
    , mViewer(viewer)
    , mReaderMainWin(win)
{
    // Workaround KMCommand::transferSelectedMsgs() expecting non-empty fetchscope
    fetchScope().fetchFullPayload(true);
}

Akonadi::ItemFetchJob *KMFetchMessageCommand::createFetchJob(const Akonadi::Item::List &items)
{
    Q_ASSERT(items.size() == 1);
    Akonadi::ItemFetchJob *fetch = mViewer->createFetchJob(items.first());
    fetchScope() = fetch->fetchScope();
    return fetch;
}

KMCommand::Result KMFetchMessageCommand::execute()
{
    Akonadi::Item item = retrievedMessage();
    if (!item.isValid() || !item.hasPayload<std::shared_ptr<KMime::Message>>()) {
        return Failed;
    }

    mItem = item;
    return OK;
}

KMReaderMainWin *KMFetchMessageCommand::readerMainWin() const
{
    return mReaderMainWin;
}

Akonadi::Item KMFetchMessageCommand::item() const
{
    return mItem;
}

QDebug operator<<(QDebug d, const KMPrintCommandInfo &t)
{
    d << "item id " << t.mMsg.id();
    d << "mOverrideFont " << t.mOverrideFont;
    d << "mEncoding " << t.mEncoding;
    d << "mFormat " << t.mFormat;
    d << "mHtmlLoadExtOverride " << t.mHtmlLoadExtOverride;
    d << "mUseFixedFont " << t.mUseFixedFont;
    d << "mPrintPreview " << t.mPrintPreview;
    d << "mShowSignatureDetails " << t.mShowSignatureDetails;
    d << "mShowEncryptionDetails " << t.mShowEncryptionDetails;
    d << "mAttachmentStrategy " << t.mAttachmentStrategy;
    d << "mHeaderStylePlugin " << t.mHeaderStylePlugin;
    return d;
}

#include "moc_kmcommands.cpp"
