File: replacemessagejob.cpp

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/*
    SPDX-FileCopyrightText: 2014 Christian Mollekopf <mollekopf@kolabsys.com>

    SPDX-License-Identifier: LGPL-2.0-or-later
*/

#include "replacemessagejob.h"

#include "imapresource_debug.h"
#include <KIMAP/AppendJob>
#include <KIMAP/SearchJob>
#include <KIMAP/SelectJob>
#include <KIMAP/StoreJob>

#include "imapflags.h"

ReplaceMessageJob::ReplaceMessageJob(const KMime::Message::Ptr &msg,
                                     KIMAP::Session *session,
                                     const QString &mailbox,
                                     qint64 uidNext,
                                     const KIMAP::ImapSet &oldUids,
                                     QObject *parent)
    : KJob(parent)
    , mSession(session)
    , mMessage(msg)
    , mMailbox(mailbox)
    , mUidNext(uidNext)
    , mOldUids(oldUids)
    , mMessageId(msg->messageID()->asUnicodeString().toUtf8())
{
}

void ReplaceMessageJob::start()
{
    auto job = new KIMAP::AppendJob(mSession);
    job->setMailBox(mMailbox);
    job->setContent(mMessage->encodedContent(true));
    job->setInternalDate(mMessage->date()->dateTime());
    connect(job, &KJob::result, this, &ReplaceMessageJob::onAppendMessageDone);
    job->start();
}

void ReplaceMessageJob::onAppendMessageDone(KJob *job)
{
    auto append = qobject_cast<KIMAP::AppendJob *>(job);

    if (append->error()) {
        qCWarning(IMAPRESOURCE_LOG) << append->errorString();
        setError(KJob::UserDefinedError);
        emitResult();
        return;
    }

    // We get it directly if UIDPLUS is supported...
    mNewUid = append->uid();

    if (mNewUid > 0 && mOldUids.isEmpty()) {
        // We have the uid an no message to delete, we're done
        emitResult();
        return;
    }

    if (mSession->selectedMailBox() != mMailbox) {
        // For search and delete we need to select the right mailbox first
        auto select = new KIMAP::SelectJob(mSession);
        select->setMailBox(mMailbox);
        connect(select, &KJob::result, this, &ReplaceMessageJob::onSelectDone);
        select->start();
    } else {
        if (mNewUid > 0) {
            triggerDeleteJobIfNecessary();
        } else {
            triggerSearchJob();
        }
    }
}

void ReplaceMessageJob::onSelectDone(KJob *job)
{
    if (job->error()) {
        qCWarning(IMAPRESOURCE_LOG) << job->errorString();
        setError(KJob::UserDefinedError);
        emitResult();
    } else {
        if (mNewUid > 0) {
            triggerDeleteJobIfNecessary();
        } else {
            triggerSearchJob();
        }
    }
}

void ReplaceMessageJob::triggerSearchJob()
{
    auto search = new KIMAP::SearchJob(mSession);

    search->setUidBased(true);

    if (!mMessageId.isEmpty()) {
        search->setTerm(KIMAP::Term(QStringLiteral("Message-ID"), QString::fromLatin1(mMessageId)));
    } else {
        if (mUidNext < 0) {
            qCWarning(IMAPRESOURCE_LOG) << "Could not determine the UID for the newly created message on the server";
            search->deleteLater();
            setError(KJob::UserDefinedError);
            emitResult();
            return;
        }
        search->setTerm(KIMAP::Term(KIMAP::Term::And, {KIMAP::Term(KIMAP::Term::New), KIMAP::Term(KIMAP::Term::Uid, KIMAP::ImapSet(mUidNext, 0))}));
    }

    connect(search, &KJob::result, this, &ReplaceMessageJob::onSearchDone);

    search->start();
}

void ReplaceMessageJob::onSearchDone(KJob *job)
{
    if (job->error()) {
        qCWarning(IMAPRESOURCE_LOG) << job->errorString();
        setError(KJob::UserDefinedError);
        emitResult();
        return;
    }

    auto search = static_cast<KIMAP::SearchJob *>(job);

    if (search->results().count() == 1) {
        mNewUid = search->results().at(0);
    } else {
        qCWarning(IMAPRESOURCE_LOG) << "Failed to find uid for message. Got 0 or too many results: " << search->results().count();
        setError(KJob::UserDefinedError);
        emitResult();
        return;
    }
    triggerDeleteJobIfNecessary();
}

void ReplaceMessageJob::triggerDeleteJobIfNecessary()
{
    if (mOldUids.isEmpty()) {
        // Nothing to do, we're done
        emitResult();
    } else {
        auto store = new KIMAP::StoreJob(mSession);
        store->setUidBased(true);
        store->setSequenceSet(mOldUids);
        store->setFlags(QList<QByteArray>() << ImapFlags::Deleted);
        store->setMode(KIMAP::StoreJob::AppendFlags);
        connect(store, &KJob::result, this, &ReplaceMessageJob::onDeleteDone);
        store->start();
    }
}

void ReplaceMessageJob::onDeleteDone(KJob *job)
{
    if (job->error()) {
        qCWarning(IMAPRESOURCE_LOG) << job->errorString();
    }
    emitResult();
}

qint64 ReplaceMessageJob::newUid() const
{
    return mNewUid;
}

#include "moc_replacemessagejob.cpp"