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/*
* qtmaildir - a Qt6 mail client for notmuch-indexed Maildirs
* Copyright (C) 2026 Danilo M. <danix@danix.xyz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "draftstore.h"
#include "maildirname.h"
#include <QDir>
#include <QFile>
#include <QObject>
#include <QSaveFile>
DraftStore::Result DraftStore::write(const QString &folderPath,
const QByteArray &bytes,
const QString &flags,
const QString &previousPath)
{
Result result;
if (folderPath.isEmpty()) {
result.error = QObject::tr("No folder was configured to write to.");
return result;
}
// cur/, never new/. A file in new/ is re-announced as fresh mail by every
// reader of the Maildir, so an autosaved draft would arrive as a new
// message on every revision.
const QString curPath = folderPath + QStringLiteral("/cur");
if (!QDir().mkpath(curPath)) {
result.error = QObject::tr("Cannot create the folder %1.").arg(curPath);
return result;
}
// A FRESH name, with no previous one to preserve flags from: a draft is
// newly composed, and MessageBuilder's bytes carry no filename. The flags
// are appended here instead.
const QString name = MaildirName::fresh(QString())
+ QStringLiteral(":2,") + flags;
const QString target = curPath + QLatin1Char('/') + name;
// QSaveFile: writes to a temporary and renames into place, so a reader
// never sees a half-written message. mbsync and notmuch both watch this
// directory.
QSaveFile file(target);
if (!file.open(QIODevice::WriteOnly)) {
result.error = QObject::tr("Cannot write to %1: %2")
.arg(target, file.errorString());
return result;
}
if (file.write(bytes) != bytes.size() || !file.commit()) {
result.error = QObject::tr("Cannot write to %1: %2")
.arg(target, file.errorString());
return result;
}
result.path = target;
// AFTER the new file is safely in place, never before: unlinking first
// would lose the draft entirely if the write then failed. A failure to
// remove the old revision is not reported as a failure of the write,
// because the new revision IS on disk; the cost is one stale file.
if (!previousPath.isEmpty() && previousPath != target)
QFile::remove(previousPath);
return result;
}
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