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/*
SPDX-FileCopyrightText: 2007 Till Adam <adam@kde.org>
SPDX-FileCopyrightText: 2008 Omat Holding B.V. <info@omat.nl>
SPDX-FileCopyrightText: 2009 Kevin Ottens <ervin@kde.org>
SPDX-FileCopyrightText: 2010 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
SPDX-FileContributor: Kevin Ottens <kevin@kdab.com>
SPDX-License-Identifier: LGPL-2.0-or-later
*/
#include "imapidlemanager.h"
#include "imapresource_debug.h"
#include <KIMAP/IdleJob>
#include <KIMAP/SelectJob>
#include <KIMAP/Session>
#include <QTimer>
#include "imapresource.h"
#include "sessionpool.h"
#include <chrono>
namespace
{
// RFC2177 says clients should restart IDLE every 29 minutes, as
// servers MAY consider clients inactive after 30 minutes.
// TODO: Make configurable to support less RF-conformant servers
static const auto IdleTimeout = std::chrono::minutes(29);
}
ImapIdleManager::ImapIdleManager(ResourceStateInterface::Ptr state, SessionPool *pool, ImapResourceBase *parent)
: QObject(parent)
, m_sessionRequestId(0)
, m_pool(pool)
, m_resource(parent)
, m_state(state)
, m_lastMessageCount(-1)
, m_lastRecentCount(-1)
{
connect(pool, &SessionPool::sessionRequestDone, this, &ImapIdleManager::onSessionRequestDone);
m_sessionRequestId = m_pool->requestSession();
m_idleTimeout = new QTimer(this);
m_idleTimeout->setSingleShot(true);
connect(m_idleTimeout, &QTimer::timeout, this, &ImapIdleManager::restartIdle);
}
ImapIdleManager::~ImapIdleManager()
{
stop();
if (m_pool) {
if (m_sessionRequestId) {
m_pool->cancelSessionRequest(m_sessionRequestId);
}
if (m_session) {
m_pool->releaseSession(m_session);
}
}
}
void ImapIdleManager::stop()
{
m_idleTimeout->stop();
if (m_idle) {
m_idle->stop();
disconnect(m_idle, nullptr, this, nullptr);
m_idle = nullptr;
}
if (m_pool) {
disconnect(m_pool, nullptr, this, nullptr);
}
}
KIMAP::Session *ImapIdleManager::session() const
{
return m_session;
}
void ImapIdleManager::reconnect()
{
qCDebug(IMAPRESOURCE_LOG) << "attempting to reconnect IDLE session";
if (m_session == nullptr && m_pool->isConnected() && m_sessionRequestId == 0) {
m_sessionRequestId = m_pool->requestSession();
}
}
void ImapIdleManager::onSessionRequestDone(qint64 requestId, KIMAP::Session *session, int errorCode, const QString & /*errorString*/)
{
if (requestId != m_sessionRequestId || session == nullptr || errorCode != SessionPool::NoError) {
return;
}
m_session = session;
m_sessionRequestId = 0;
connect(m_pool, &SessionPool::connectionLost, this, &ImapIdleManager::onConnectionLost);
connect(m_pool, &SessionPool::disconnectDone, this, &ImapIdleManager::onPoolDisconnect);
startIdle();
}
void ImapIdleManager::startIdle()
{
const auto idleMailBox = m_state->mailBoxForCollection(m_state->collection());
if (m_session->selectedMailBox() != idleMailBox) {
auto select = new KIMAP::SelectJob(m_session);
select->setMailBox(idleMailBox);
connect(select, &KIMAP::SelectJob::result, this, &ImapIdleManager::onSelectDone);
select->start();
}
m_idle = new KIMAP::IdleJob(m_session);
connect(m_idle.data(), &KIMAP::IdleJob::mailBoxStats, this, &ImapIdleManager::onStatsReceived);
connect(m_idle.data(), &KIMAP::IdleJob::mailBoxMessageFlagsChanged, this, &ImapIdleManager::onFlagsChanged);
connect(m_idle.data(), &KIMAP::IdleJob::result, this, &ImapIdleManager::onIdleStopped);
m_idle->start();
m_idleTimeout->start(std::chrono::milliseconds(IdleTimeout).count());
}
void ImapIdleManager::restartIdle()
{
qCDebug(IMAPRESOURCE_LOG) << "Restarting IDLE to prevent server from disconnecting me!";
if (m_idle) {
m_idle->stop(); // this will invoke onIdleStopped(), which will automatically reconnect
}
}
void ImapIdleManager::onConnectionLost(KIMAP::Session *session)
{
if (session == m_session) {
// Our session becomes invalid, so get ride of
// the pointer, we don't need to release it once the
// task is done
m_session = nullptr;
QMetaObject::invokeMethod(this, &ImapIdleManager::reconnect, Qt::QueuedConnection);
}
}
void ImapIdleManager::onPoolDisconnect()
{
// All the sessions in the pool we used changed,
// so get ride of the pointer, we don't need to
// release our session anymore
m_pool = nullptr;
}
void ImapIdleManager::onSelectDone(KJob *job)
{
auto select = static_cast<KIMAP::SelectJob *>(job);
m_lastMessageCount = select->messageCount();
m_lastRecentCount = select->recentCount();
}
void ImapIdleManager::onIdleStopped()
{
qCDebug(IMAPRESOURCE_LOG) << "IDLE dropped maybe we should reconnect?";
m_idle = nullptr;
if (m_session) {
qCDebug(IMAPRESOURCE_LOG) << "Restarting the IDLE session!";
startIdle();
}
}
void ImapIdleManager::onStatsReceived(KIMAP::IdleJob *job, const QString &mailBox, int messageCount, int recentCount)
{
qCDebug(IMAPRESOURCE_LOG) << "IDLE stats received:" << job << mailBox << messageCount << recentCount;
qCDebug(IMAPRESOURCE_LOG) << "Cached information:" << m_state->collection().remoteId() << m_state->collection().id() << m_lastMessageCount
<< m_lastRecentCount;
// It seems we're not in sync with the cache, resync is needed
if (messageCount != m_lastMessageCount || recentCount != m_lastRecentCount) {
m_lastMessageCount = messageCount;
m_lastRecentCount = recentCount;
qCDebug(IMAPRESOURCE_LOG) << "Resync needed for" << mailBox << m_state->collection().id();
m_resource->synchronizeCollection(m_state->collection().id());
}
}
void ImapIdleManager::onFlagsChanged(KIMAP::IdleJob *job)
{
Q_UNUSED(job)
qCDebug(IMAPRESOURCE_LOG) << "IDLE flags changed in" << m_session->selectedMailBox();
m_resource->synchronizeCollection(m_state->collection().id());
}
#include "moc_imapidlemanager.cpp"
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