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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 <notmuch.h>
#include <utility>
/// Generic owner for a notmuch handle with a destroy function.
template <typename T, void (*Destroy)(T *)>
class NmHandle
{
public:
NmHandle() = default;
explicit NmHandle(T *handle) : m_handle(handle) {}
~NmHandle() { reset(); }
NmHandle(const NmHandle &) = delete;
NmHandle &operator=(const NmHandle &) = delete;
NmHandle(NmHandle &&other) noexcept
: m_handle(std::exchange(other.m_handle, nullptr)) {}
NmHandle &operator=(NmHandle &&other) noexcept
{
if (this != &other) {
reset();
m_handle = std::exchange(other.m_handle, nullptr);
}
return *this;
}
void reset(T *handle = nullptr)
{
if (m_handle)
Destroy(m_handle);
m_handle = handle;
}
T *get() const { return m_handle; }
explicit operator bool() const { return m_handle != nullptr; }
private:
T *m_handle = nullptr;
};
using NmQuery = NmHandle<notmuch_query_t, notmuch_query_destroy>;
using NmThreads = NmHandle<notmuch_threads_t, notmuch_threads_destroy>;
using NmMessages = NmHandle<notmuch_messages_t, notmuch_messages_destroy>;
using NmThread = NmHandle<notmuch_thread_t, notmuch_thread_destroy>;
using NmMessage = NmHandle<notmuch_message_t, notmuch_message_destroy>;
using NmTags = NmHandle<notmuch_tags_t, notmuch_tags_destroy>;
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