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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.
*/
#pragma once
#include <QByteArray>
#include <QString>
/// Writes message bytes into a Maildir folder.
///
/// Drafts and sent copies are the same operation into different folders with
/// different flags, so they are one unit. Nothing here calls notmuch: the
/// files become visible on the next sync, which keeps the read-only-by-default
/// rule intact and needs no write lock.
class DraftStore
{
public:
struct Result
{
QString path; ///< The file written. Empty on failure.
QString error; ///< Empty on success.
bool ok() const { return error.isEmpty(); }
};
/// Writes \p bytes into \p folderPath, an absolute Maildir folder.
///
/// The folder is the CALLER's to resolve, and item 124 is why it is not
/// resolved here: the mail root comes from
/// `notmuch_config_get(NOTMUCH_CONFIG_MAIL_ROOT)`, never from
/// `notmuch_database_get_path()`, which under a split index returns the
/// Xapian directory. A store that composed its own path from the wrong
/// accessor would write drafts into the index tree.
///
/// \p flags is the Maildir flag string without the `:2,` prefix: "D" for a
/// draft, "S" for a sent copy.
///
/// \p previousPath, when not empty, is unlinked AFTER the new file is
/// safely in place. Maildir has no in-place edit, so a draft rewritten
/// every thirty seconds would otherwise accumulate one file per pause.
/// The order matters: unlinking first would lose the draft entirely if the
/// write then failed.
static Result write(const QString &folderPath, const QByteArray &bytes,
const QString &flags, const QString &previousPath = {});
};
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