/*
* LMDB Abstraction Layer.
 * Copyright (C) 2023  Yury Gubich <blue@macaw.me>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include "session.h"

LMDBAL::Session::Session():
    parent(nullptr) {}

LMDBAL::Session::Session(Base* parent):
    parent(parent)
{
    parent->registerSession(this);
}

LMDBAL::Session::Session(Session&& other):
    parent(other.parent)
{
    if (parent)
        parent->replaceSession(&other, this);
}

LMDBAL::Session::~Session() {
    if (parent)
        parent->unregisterSession(this);
}

LMDBAL::Session& LMDBAL::Session::operator = (Session&& other) {
    if (parent)
        if (other.parent)
            parent->unregisterSession(&other);
        else
            parent->unregisterSession(this);
    else
        if (other.parent)
            other.parent->replaceSession(&other, this);

    parent = other.parent;
    other.terminate();

    return *this;
}

void LMDBAL::Session::close() {
    if (!parent)
        return;

    parent->unregisterSession(this);
    terminate();
}

bool LMDBAL::Session::opened() const {
    return parent != nullptr;
}

void LMDBAL::Session::terminate() {
    parent = nullptr;
}