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// SPDX-FileCopyrightText: 2024 Arjen Hiemstra <ahiemstra@heimr.nl>
// SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
#include "SessionController.h"
#include <Cursor.h>
#include <InputHandler.h>
#include <KLocalizedString>
#include <PortalSession.h>
#include <QAction>
#include <QCoreApplication>
#include <QDBusInterface>
#include <QMenu>
#include <RdpConnection.h>
#include <Server.h>
#ifdef WITH_PLASMA_SESSION
#include <PlasmaScreencastV1Session.h>
#endif
class SessionWrapper : public QObject
{
Q_OBJECT
public:
SessionWrapper(KRdp::RdpConnection *conn, std::unique_ptr<KRdp::AbstractSession> &&sess, KStatusNotifierItem *sni)
: session(std::move(sess))
, connection(conn)
{
m_sni = sni;
connect(session.get(), &KRdp::AbstractSession::frameReceived, connection->videoStream(), &KRdp::VideoStream::queueFrame);
connect(session.get(), &KRdp::AbstractSession::cursorUpdate, this, &SessionWrapper::onCursorUpdate);
connect(session.get(), &KRdp::AbstractSession::error, this, &SessionWrapper::sessionError);
connect(connection->videoStream(), &KRdp::VideoStream::enabledChanged, this, &SessionWrapper::onVideoStreamEnabledChanged);
connect(connection->videoStream(), &KRdp::VideoStream::requestedFrameRateChanged, this, &SessionWrapper::onRequestedFrameRateChanged);
connect(connection->inputHandler(), &KRdp::InputHandler::inputEvent, session.get(), &KRdp::AbstractSession::sendEvent);
connect(connection, &QObject::destroyed, this, &SessionWrapper::onConnectionDestroyed);
}
void onCursorUpdate(const PipeWireCursor &cursor)
{
if (!connection) {
return;
}
KRdp::Cursor::CursorUpdate update;
update.hotspot = cursor.hotspot;
update.image = cursor.texture;
connection->cursor()->update(update);
}
void onVideoStreamEnabledChanged()
{
if (connection->videoStream()->enabled()) {
session->requestStreamingEnable(connection->videoStream());
} else {
session->requestStreamingDisable(connection->videoStream());
}
}
void onRequestedFrameRateChanged()
{
session->setVideoFrameRate(connection->videoStream()->requestedFrameRate());
}
void onConnectionDestroyed()
{
Q_EMIT connectionDestroyed(this);
}
Q_SIGNAL void sessionError();
Q_SIGNAL void connectionDestroyed(SessionWrapper *wrapper);
std::unique_ptr<KRdp::AbstractSession> session;
QPointer<KRdp::RdpConnection> connection;
KStatusNotifierItem *m_sni;
};
SessionController::SessionController(KRdp::Server *server, SessionType sessionType)
: m_server(server)
, m_sessionType(sessionType)
{
connect(m_server, &KRdp::Server::newConnectionCreated, this, &SessionController::onNewConnection);
// Status notification item
m_sni = new KStatusNotifierItem(u"krdpserver"_qs, this);
auto menu = new QMenu(u"quitMenu"_qs);
// Disable default quit button since it has confirmation dialog
m_sni->setStandardActionsEnabled(false);
m_sni->setTitle(i18n("RDP Server"));
m_sni->setIconByName(u"preferences-system-network-remote"_qs);
m_sni->setStatus(KStatusNotifierItem::Passive);
auto quitAction = new QAction(i18n("Quit"), menu);
quitAction->setIcon(QIcon::fromTheme(QStringLiteral("application-exit")));
connect(quitAction, &QAction::triggered, this, &SessionController::stopFromSNI);
menu->addAction(quitAction);
m_sni->setContextMenu(menu);
// Create a single temporary session to request permissions from the portal
// on startup.
if (sessionType == SessionType::Portal) {
m_initializationSession = makeSession();
auto cleanup = [this]() {
auto session = m_initializationSession.release();
session->deleteLater();
};
// Destroy the session after we've successfully connected, we just use
// it to get permissions. Reusing it is going to lead to problems with
// reconnection.
connect(m_initializationSession.get(), &KRdp::AbstractSession::started, this, cleanup);
connect(m_initializationSession.get(), &KRdp::AbstractSession::error, this, cleanup);
m_initializationSession->start();
}
}
SessionController::~SessionController() noexcept
{
}
void SessionController::setMonitorIndex(const std::optional<int> &index)
{
m_monitorIndex = index;
}
void SessionController::setVirtualMonitor(const KRdp::VirtualMonitor &virtualMonitor)
{
m_virtualMonitor = virtualMonitor;
}
void SessionController::setQuality(const std::optional<int> &quality)
{
m_quality = quality;
}
void SessionController::onNewConnection(KRdp::RdpConnection *newConnection)
{
auto wrapper = std::make_unique<SessionWrapper>(newConnection, makeSession(), m_sni);
if (m_virtualMonitor) {
wrapper->session->setVirtualMonitor(*m_virtualMonitor);
} else {
wrapper->session->setActiveStream(m_monitorIndex.value_or(-1));
}
wrapper->session->setVideoQuality(m_quality.value());
connect(wrapper.get(), &SessionWrapper::connectionDestroyed, this, [this](SessionWrapper *wrapper) {
m_wrappers.erase(std::remove_if(m_wrappers.begin(),
m_wrappers.end(),
[wrapper](std::unique_ptr<SessionWrapper> &entry) {
return entry.get() == wrapper;
}),
m_wrappers.end());
});
connect(wrapper.get(), &SessionWrapper::sessionError, this, [newConnection] {
newConnection->close(KRdp::RdpConnection::CloseReason::None);
});
wrapper->session->start();
m_wrappers.push_back(std::move(wrapper));
}
void SessionController::stopFromSNI()
{
// Uses dbus to stop the server service, like in the KCM
// This kills all krdpserver instances, like a "panic button"
QDBusInterface unit(u"org.freedesktop.systemd1"_qs,
u"/org/freedesktop/systemd1/unit/plasma_2dkrdp_5fserver_2eservice"_qs,
u"org.freedesktop.systemd1.Unit"_qs);
unit.asyncCall(u"Stop"_qs);
QCoreApplication::quit();
}
std::unique_ptr<KRdp::AbstractSession> SessionController::makeSession()
{
#ifdef WITH_PLASMA_SESSION
if (m_sessionType == SessionType::Plasma) {
return std::make_unique<KRdp::PlasmaScreencastV1Session>(m_server);
} else
#endif
{
return std::make_unique<KRdp::PortalSession>(m_server);
}
}
#include "SessionController.moc"
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