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matrix-room-member-list-model.cpp
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matrix-room-member-list-model.cpp
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/*
* This file is part of kazv.
* SPDX-FileCopyrightText: 2020-2023 tusooa <tusooa@kazv.moe>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include <libkazv-config.hpp>
#include <immer/config.hpp> // https://github.com/arximboldi/immer/issues/168
#include <cmath>
#include <lager/lenses/optional.hpp>
#include <cursorutil.hpp>
#include "matrix-room-member-list-model.hpp"
#include "matrix-room-member.hpp"
using namespace Kazv;
MatrixRoomMemberListModel::MatrixRoomMemberListModel(lager::reader<Kazv::EventList> members, QObject *parent)
: QAbstractListModel(parent)
, m_members(members)
, m_internalCount(0)
, LAGER_QT(count)(m_members.map([](const auto &m) -> int { return m.size(); }))
{
m_internalCount = count();
connect(this, &MatrixRoomMemberListModel::countChanged,
this, &MatrixRoomMemberListModel::updateInternalCount);
}
MatrixRoomMemberListModel::~MatrixRoomMemberListModel() = default;
MatrixRoomMember *MatrixRoomMemberListModel::at(int index) const
{
return new MatrixRoomMember(m_members[index][lager::lenses::or_default]);
}
int MatrixRoomMemberListModel::rowCount(const QModelIndex &index) const
{
if (index.isValid()) {
return 0;
} else {
return count();
}
}
QVariant MatrixRoomMemberListModel::data(const QModelIndex &, int) const
{
return QVariant();
}
void MatrixRoomMemberListModel::updateInternalCount()
{
auto curCount = count();
auto oldCount = m_internalCount;
auto diff = std::abs(curCount - oldCount);
if (curCount > oldCount) {
beginInsertRows(QModelIndex(), 0, diff - 1);
m_internalCount = curCount;
endInsertRows();
} else if (curCount < oldCount) {
beginRemoveRows(QModelIndex(), 0, diff - 1);
m_internalCount = curCount;
endRemoveRows();
}
}

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