idlescreen.cpp

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// C++
#include <chrono>
 
// Ct
#include <QTimer>
 
// MythTV
#include "libmyth/mythcontext.h"
#include "libmythbase/mythsystemlegacy.h"
#include "libmythbase/programinfo.h"
#include "libmythtv/tvremoteutil.h"
#include "libmythui/mythmainwindow.h"
#include "libmythui/mythuibuttonlist.h"
#include "libmythui/mythuistatetype.h"
#include "libmythui/mythuitext.h"
 
// MythFrontend
#include "idlescreen.h"
 
static constexpr std::chrono::milliseconds UPDATE_INTERVAL { 15s };
 
IdleScreen::IdleScreen(MythScreenStack *parent)
              :MythScreenType(parent, "standbymode"),
              m_updateScreenTimer(new QTimer(this))
{
    gCoreContext->addListener(this);
    GetMythMainWindow()->EnterStandby();
 
    connect(m_updateScreenTimer, &QTimer::timeout,
            this, &IdleScreen::UpdateScreen);
    m_updateScreenTimer->start(UPDATE_INTERVAL);
}
 
IdleScreen::~IdleScreen()
{
    GetMythMainWindow()->ExitStandby();
    gCoreContext->removeListener(this);
 
    if (m_updateScreenTimer)
        m_updateScreenTimer->disconnect();
}
 
bool IdleScreen::Create(void)
{
    // Load the theme for this screen
    bool foundtheme = LoadWindowFromXML("status-ui.xml", "standbymode", this);
    if (!foundtheme)
        return false;
 
    bool err = false;
    UIUtilE::Assign(this, m_statusState, "backendstatus", &err);
 
    /* currentrecording, nextrecording, conflicts and conflictwarning are optional */
    UIUtilW::Assign(this, m_currentRecordings, "currentrecording");
    UIUtilW::Assign(this, m_nextRecordings, "nextrecording");
    UIUtilW::Assign(this, m_conflictingRecordings, "conflicts");
    UIUtilW::Assign(this, m_conflictWarning, "conflictwarning");
 
    if (err)
    {
        LOG(VB_GENERAL, LOG_ERR, "Cannot load screen 'standbymode'");
        return false;
    }
 
    UpdateScheduledList();
 
    return true;
}
 
void IdleScreen::Load(void)
{
    MythScreenType::Load();
}
 
void IdleScreen::Init(void)
{
    UpdateScreen();
}
 
bool IdleScreen::CheckConnectionToServer(void)
{
    m_updateScreenTimer->stop();
 
    bool bRes = false;
 
    if (gCoreContext->IsConnectedToMaster())
        bRes = true;
    else
    {
        if (gCoreContext->SafeConnectToMasterServer(false))
            bRes = true;
    }
 
    if (bRes)
        m_updateScreenTimer->start(UPDATE_INTERVAL);
    else
        m_updateScreenTimer->start(5s);
 
    return bRes;
}
 
void IdleScreen::UpdateStatus(void)
{
    QString state = "idle";
 
    if (CheckConnectionToServer())
    {
        if (m_secondsToShutdown >= 0s)
            state = "shuttingdown";
        else if (RemoteGetRecordingStatus())
            state = "recording";
    }
    else
    {
        state = "offline";
    }
 
    m_statusState->DisplayState(state);
 
    MythUIType* shuttingdown = m_statusState->GetState("shuttingdown");
 
    if (shuttingdown)
    {
        MythUIText *statusText = dynamic_cast<MythUIText *>(shuttingdown->GetChild("status"));
 
        if (statusText)
        {
            if (m_secondsToShutdown >= 0s)
            {
                QString status = tr("Backend will shutdown in %n "
                                    "second(s).", "", m_secondsToShutdown.count());
 
                statusText->SetText(status);
            }
            else
            {
                statusText->Reset();
            }
        }
    }
}
 
void IdleScreen::UpdateScreen(void)
{
    if (m_currentRecordings)
    {
        m_currentRecordings->Reset();
        m_currentRecordings->SetCanTakeFocus(false);
    }
 
    if (m_nextRecordings)
    {
        m_nextRecordings->Reset();
        m_nextRecordings->SetCanTakeFocus(false);
    }
 
    if (m_conflictingRecordings)
    {
        m_conflictingRecordings->Reset();
        m_conflictingRecordings->SetCanTakeFocus(false);
    }
 
    if (m_conflictWarning)
        m_conflictWarning->SetVisible(m_hasConflicts);
 
    // update scheduled
    if (!m_scheduledList.empty())
    {
        auto pit = m_scheduledList.begin();
 
        while (pit != m_scheduledList.end())
        {
            ProgramInfo *progInfo = *pit;
            if (progInfo)
            {
                MythUIButtonList *list = nullptr;
                const RecStatus::Type recstatus = progInfo->GetRecordingStatus();
 
                switch(recstatus)
                {
                    case RecStatus::Recording:
                    case RecStatus::Tuning:
                    case RecStatus::Failing:
                        list = m_currentRecordings;
                        break;
 
                    case RecStatus::WillRecord:
                    case RecStatus::Pending:
                        list = m_nextRecordings;
                        break;
 
                    case RecStatus::Conflict:
                        list = m_conflictingRecordings;
                        break;
 
                    default:
                        list = nullptr;
                        break;
                }
 
                if (list != nullptr)
                {
                    auto *item = new MythUIButtonListItem(list,"",
                                                 QVariant::fromValue(progInfo));
 
                    InfoMap infoMap;
                    progInfo->ToMap(infoMap);
                    item->SetTextFromMap(infoMap, "");
                }
            }
            ++pit;
        }
    }
 
    UpdateStatus();
}
 
bool IdleScreen::UpdateScheduledList()
{
    {
        // clear pending flag early in case something happens while
        // we're updating
        QMutexLocker lock(&m_schedUpdateMutex);
        SetPendingSchedUpdate(false);
    }
 
    m_scheduledList.clear();
 
    if (!gCoreContext->IsConnectedToMaster())
    {
        return false;
    }
 
    if (!LoadFromScheduler(m_scheduledList, m_hasConflicts))
        return false;
 
    UpdateScreen();
 
    return true;
}
 
bool IdleScreen::keyPressEvent(QKeyEvent* event)
{
    return MythScreenType::keyPressEvent(event);
}
 
void IdleScreen::customEvent(QEvent* event)
{
    if (event->type() == MythEvent::kMythEventMessage)
    {
        auto *me = dynamic_cast<MythEvent *>(event);
        if (me == nullptr)
            return;
 
        if (me->Message().startsWith("RECONNECT_"))
        {
            m_secondsToShutdown = -1s;
            UpdateStatus();
        }
        else if (me->Message().startsWith("SHUTDOWN_COUNTDOWN"))
        {
            QString secs = me->Message().mid(19);
            m_secondsToShutdown = std::chrono::seconds(secs.toInt());
            UpdateStatus();
        }
        else if (me->Message().startsWith("SHUTDOWN_NOW"))
        {
            if (gCoreContext->IsFrontendOnly())
            {
                // does the user want to shutdown this frontend only machine
                // when the BE shuts down?
                if (gCoreContext->GetNumSetting("ShutdownWithMasterBE", 0) == 1)
                {
                     LOG(VB_GENERAL, LOG_NOTICE,
                         "Backend has gone offline, Shutting down frontend");
                     QString poweroff_cmd =
                        gCoreContext->GetSetting("MythShutdownPowerOff", "");
                     if (!poweroff_cmd.isEmpty())
                         myth_system(poweroff_cmd);
                }
            }
        }
        else if (me->Message().startsWith("SCHEDULE_CHANGE") ||
                 me->Message().startsWith("RECORDING_LIST_CHANGE") ||
                 me->Message() == "UPDATE_PROG_INFO")
        {
            QMutexLocker lock(&m_schedUpdateMutex);
 
            if (!PendingSchedUpdate())
            {
                QTimer::singleShot(50ms, this, &IdleScreen::UpdateScheduledList);
                SetPendingSchedUpdate(true);
            }
        }
    }
 
    MythUIType::customEvent(event);
}