autoexpire.cpp

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#include <QtGlobal>
#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
#include <QtSystemDetection>
#endif
 
// System headers
#include <sys/stat.h>
#ifdef Q_OS_LINUX
#  include <sys/vfs.h>
#else // if !Q_OS_LINUX
#  include <sys/param.h>
#  ifndef Q_OS_WINDOWS
#    include <sys/mount.h>
#  endif // Q_OS_WINDOWS
#endif // !Q_OS_LINUX
 
// POSIX headers
#include <unistd.h>
 
// C++ headers
#include <algorithm>
#include <cstdlib>
#include <iostream>
 
// Qt headers
#include <QDateTime>
#include <QFileInfo>
#include <QList>
 
// MythTV headers
#include "libmythbase/compat.h"
#include "libmythbase/filesysteminfo.h"
#include "libmythbase/mythcorecontext.h"
#include "libmythbase/mythdate.h"
#include "libmythbase/mythdb.h"
#include "libmythbase/mythlogging.h"
#include "libmythbase/storagegroup.h"
#include "libmythprotoserver/requesthandler/fileserverutil.h"
#include "libmythtv/programinfo.h"
#include "libmythtv/remoteencoder.h"
#include "libmythtv/tv_rec.h"
 
// MythBackend
#include "autoexpire.h"
#include "backendcontext.h"
#include "encoderlink.h"
#include "mainserver.h"
 
#define LOC     QString("AutoExpire: ")
#define LOC_ERR QString("AutoExpire Error: ")
 
static constexpr uint64_t kSpaceTooBigKB { 3ULL * 1024 * 1024 };
 
// Consider recordings within the last two hours to be too recent to
// add to the autoexpire list.
static constexpr int64_t kRecentInterval { 2LL * 60 * 60 };
 
void ExpireThread::run(void)
{
    RunProlog();
    m_parent->RunExpirer();
    RunEpilog();
}
 
AutoExpire::AutoExpire(QMap<int, EncoderLink *> *tvList) :
    m_encoderList(tvList),
    m_expireThread(new ExpireThread(this)),
    m_expireThreadRun(true)
{
    m_expireThread->start();
    gCoreContext->addListener(this);
}
 
AutoExpire::~AutoExpire()
{
    {
        QMutexLocker locker(&m_instanceLock);
        m_expireThreadRun = false;
        m_instanceCond.wakeAll();
    }
 
    {
        QMutexLocker locker(&m_updateLock);
        m_updateQueue.clear();
    }
 
    if (m_expireThread)
    {
        gCoreContext->removeListener(this);
        m_expireThread->wait();
        delete m_expireThread;
        m_expireThread = nullptr;
    }
}
 
uint64_t AutoExpire::GetDesiredSpace(int fsID) const
{
    QMutexLocker locker(&m_instanceLock);
    if (m_desiredSpace.contains(fsID))
        return m_desiredSpace[fsID];
    return 0;
}
 
void AutoExpire::CalcParams()
{
    LOG(VB_FILE, LOG_INFO, LOC + "CalcParams()");
 
    FileSystemInfoList fsInfos;
 
    m_instanceLock.lock();
    if (m_mainServer)
    {
        // The scheduler relies on something forcing the mainserver
        // fsinfos cache to get updated periodically.  Currently, that
        // is done here.  Don't remove or change this invocation
        // without handling that issue too.  It is done this way
        // because the scheduler thread can't afford to be blocked by
        // an unresponsive, remote filesystem and the autoexpirer
        // thread can.
        m_mainServer->GetFilesystemInfos(fsInfos, false);
    }
    m_instanceLock.unlock();
 
    if (fsInfos.empty())
    {
        LOG(VB_GENERAL, LOG_ERR, LOC + "Filesystem Info cache is empty, unable " 
                                       "to calculate necessary parameters.");
        return;
    }
 
    uint64_t maxKBperMin = 0;
    uint64_t extraKB = static_cast<uint64_t>
                        (gCoreContext->GetNumSetting("AutoExpireExtraSpace", 0))
                          << 20;
 
    QMap<int, uint64_t> fsMap;
    QMap<int, std::vector<int> > fsEncoderMap;
 
    // We use this copying on purpose. The used_encoders map ensures
    // that every encoder writes only to one fs.
    // Copying the data minimizes the time the lock is held.
    m_instanceLock.lock();
    QMap<int, int>::const_iterator ueit = m_usedEncoders.cbegin();
    while (ueit != m_usedEncoders.cend())
    {
        fsEncoderMap[*ueit].push_back(ueit.key());
        ++ueit;
    }
    m_instanceLock.unlock();
 
    for (const auto& fs : std::as_const(fsInfos))
    {
        if (fsMap.contains(fs.getFSysID()))
            continue;
 
        fsMap[fs.getFSysID()] = 0;
        uint64_t thisKBperMin = 0;
 
        // append unknown recordings to all fsIDs
        for (auto unknownfs : std::as_const(fsEncoderMap[-1]))
            fsEncoderMap[fs.getFSysID()].push_back(unknownfs);
 
        if (fsEncoderMap.contains(fs.getFSysID()))
        {
            LOG(VB_FILE, LOG_INFO,
                QString("fsID #%1: Total: %2 GB   Used: %3 GB   Free: %4 GB")
                    .arg(fs.getFSysID())
                .arg(fs.getTotalSpace() / 1024.0 / 1024.0, 7, 'f', 1)
                .arg(fs.getUsedSpace() / 1024.0 / 1024.0, 7, 'f', 1)
                .arg(fs.getFreeSpace() / 1024.0 / 1024.0, 7, 'f', 1));
 
            for (auto cardid : std::as_const(fsEncoderMap[fs.getFSysID()]))
            {
                auto iter = m_encoderList->constFind(cardid);
                if (iter == m_encoderList->constEnd())
                    continue;
                EncoderLink *enc = *iter;
 
                if (!enc->IsConnected() || !enc->IsBusy())
                {
                    // remove encoder since it can't write to any file system
                    LOG(VB_FILE, LOG_INFO, LOC +
                        QString("Cardid %1: is not recording, removing it "
                                "from used list.").arg(cardid));
                    m_instanceLock.lock();
                    m_usedEncoders.remove(cardid);
                    m_instanceLock.unlock();
                    continue;
                }
 
                uint64_t maxBitrate = enc->GetMaxBitrate();
                if (maxBitrate==0)
                    maxBitrate = 19500000LL;
                thisKBperMin += (maxBitrate*((uint64_t)15))>>11;
                LOG(VB_FILE, LOG_INFO, QString("    Cardid %1: max bitrate "
                        "%2 Kb/sec, fsID %3 max is now %4 KB/min")
                        .arg(enc->GetInputID())
                        .arg(enc->GetMaxBitrate() >> 10)
                        .arg(fs.getFSysID())
                        .arg(thisKBperMin));
            }
        }
        fsMap[fs.getFSysID()] = thisKBperMin;
 
        if (thisKBperMin > maxKBperMin)
        {
            LOG(VB_FILE, LOG_INFO,
                QString("  Max of %1 KB/min for fsID %2 is higher "
                    "than the existing Max of %3 so we'll use this Max instead")
                    .arg(thisKBperMin).arg(fs.getFSysID()).arg(maxKBperMin));
            maxKBperMin = thisKBperMin;
        }
    }
 
    // Determine frequency to run autoexpire so it doesn't have to free
    // too much space
    uint expireFreq = 15;
    if (maxKBperMin > 0)
    {
        expireFreq = kSpaceTooBigKB / (maxKBperMin + maxKBperMin/3);
        expireFreq = std::clamp(expireFreq, 3U, 15U);
    }
 
    double expireMinGB = ((maxKBperMin + maxKBperMin/3)
                          * expireFreq + extraKB) >> 20;
    LOG(VB_GENERAL, LOG_NOTICE, LOC +
        QString("CalcParams(): Max required Free Space: %1 GB w/freq: %2 min")
            .arg(expireMinGB, 0, 'f', 1).arg(expireFreq));
 
    // lock class and save these parameters.
    m_instanceLock.lock();
    m_desiredFreq = expireFreq;
    // write per file system needed space back, use safety of 33%
    QMap<int, uint64_t>::iterator it = fsMap.begin();
    while (it != fsMap.end())
    {
        m_desiredSpace[it.key()] = ((*it + *it/3) * expireFreq) + extraKB;
        ++it;
    }
    m_instanceLock.unlock();
}
 
void AutoExpire::RunExpirer(void)
{
    QElapsedTimer timer;
    QDateTime curTime;
    QDateTime next_expire = MythDate::current().addSecs(60);
 
    QMutexLocker locker(&m_instanceLock);
 
    // wait a little for main server to come up and things to settle down
    Sleep(20s);
 
    timer.start();
 
    while (m_expireThreadRun)
    {
        TVRec::s_inputsLock.lockForRead();
 
        curTime = MythDate::current();
        // recalculate auto expire parameters
        if (curTime >= next_expire)
        {
            m_updateLock.lock();
            while (!m_updateQueue.empty())
            {
                UpdateEntry ue = m_updateQueue.dequeue();
                if (ue.m_encoder > 0)
                    m_usedEncoders[ue.m_encoder] = ue.m_fsID; // clazy:exclude=readlock-detaching
            }
            m_updateLock.unlock();
 
            locker.unlock();
            CalcParams();
            locker.relock();
            if (!m_expireThreadRun)
                break;
        }
        timer.restart();
 
        UpdateDontExpireSet();
 
        // Expire Short LiveTV files for this backend every 2 minutes
        if ((curTime.time().minute() % 2) == 0)
            ExpireLiveTV(emShortLiveTVPrograms);
 
        // Expire normal recordings depending on frequency calculated
        if (curTime >= next_expire)
        {
            LOG(VB_FILE, LOG_INFO, LOC + "Running now!");
            next_expire =
                MythDate::current().addSecs(m_desiredFreq * 60LL);
 
            ExpireLiveTV(emNormalLiveTVPrograms);
 
            int maxAge = gCoreContext->GetNumSetting("DeletedMaxAge", 0);
            if (maxAge > 0)
                ExpireOldDeleted();
            else if (maxAge == 0)
                ExpireQuickDeleted();
 
            ExpireEpisodesOverMax();
 
            ExpireRecordings();
        }
 
        TVRec::s_inputsLock.unlock();
 
        Sleep(60s - std::chrono::milliseconds(timer.elapsed()));
    }
}
 
void AutoExpire::Sleep(std::chrono::milliseconds sleepTime)
{
    if (sleepTime <= 0ms)
        return;
 
    QDateTime little_tm = MythDate::current().addMSecs(sleepTime.count());
    std::chrono::milliseconds timeleft = sleepTime;
    while (m_expireThreadRun && (timeleft > 0ms))
    {
        m_instanceCond.wait(&m_instanceLock, timeleft.count());
        timeleft = MythDate::secsInFuture(little_tm);
    }
}
 
void AutoExpire::ExpireLiveTV(int type)
{
    pginfolist_t expireList;
 
    LOG(VB_FILE, LOG_INFO, LOC + QString("ExpireLiveTV(%1)").arg(type));
    FillDBOrdered(expireList, type);
    SendDeleteMessages(expireList);
    ClearExpireList(expireList);
}
 
void AutoExpire::ExpireOldDeleted(void)
{
    pginfolist_t expireList;
 
    LOG(VB_FILE, LOG_INFO, LOC + QString("ExpireOldDeleted()"));
    FillDBOrdered(expireList, emOldDeletedPrograms);
    SendDeleteMessages(expireList);
    ClearExpireList(expireList);
}
 
void AutoExpire::ExpireQuickDeleted(void)
{
    pginfolist_t expireList;
 
    LOG(VB_FILE, LOG_INFO, LOC + QString("ExpireQuickDeleted()"));
    FillDBOrdered(expireList, emQuickDeletedPrograms);
    SendDeleteMessages(expireList);
    ClearExpireList(expireList);
}
 
void AutoExpire::ExpireRecordings(void)
{
    pginfolist_t expireList;
    pginfolist_t deleteList;
    FileSystemInfoList fsInfos;
 
    LOG(VB_FILE, LOG_INFO, LOC + "ExpireRecordings()");
 
    if (m_mainServer)
        m_mainServer->GetFilesystemInfos(fsInfos, true);
 
    if (fsInfos.empty())
    {
        LOG(VB_GENERAL, LOG_ERR, LOC + "Filesystem Info cache is empty, unable "
                                      "to determine what Recordings to expire");
 
        return;
    }
 
    FillExpireList(expireList);
 
    QMap <int, bool> truncateMap;
    MSqlQuery query(MSqlQuery::InitCon());
    query.prepare("SELECT DISTINCT rechost, recdir "
                  "FROM inuseprograms "
                  "WHERE recusage = 'truncatingdelete' "
                   "AND lastupdatetime > DATE_ADD(NOW(), INTERVAL -2 MINUTE);");
 
    if (!query.exec())
    {
        MythDB::DBError(LOC + "ExpireRecordings", query);
    }
    else
    {
        while (query.next())
        {
            QString rechost = query.value(0).toString();
            QString recdir  = query.value(1).toString();
 
            LOG(VB_FILE, LOG_INFO, LOC +
                QString("%1:%2 has an in-progress truncating delete.")
                    .arg(rechost, recdir));
 
            for (const auto& fs : std::as_const(fsInfos))
            {
                if ((fs.getHostname() == rechost) &&
                    (fs.getPath() == recdir))
                {
                    truncateMap[fs.getFSysID()] = true;
                    break;
                }
            }
        }
    }
 
    QMap <int, bool> fsMap;
    for (
#if QT_VERSION < QT_VERSION_CHECK(6,0,0)
        auto* fsit = fsInfos.begin();
#else
        auto fsit = fsInfos.begin();
#endif
fsit != fsInfos.end(); ++fsit)
    {
        if (fsMap.contains(fsit->getFSysID()))
            continue;
 
        fsMap[fsit->getFSysID()] = true;
 
        LOG(VB_FILE, LOG_INFO,
            QString("fsID #%1: Total: %2 GB   Used: %3 GB   Free: %4 GB")
                .arg(fsit->getFSysID())
                .arg(fsit->getTotalSpace() / 1024.0 / 1024.0, 7, 'f', 1)
                .arg(fsit->getUsedSpace() / 1024.0 / 1024.0, 7, 'f', 1)
                .arg(fsit->getFreeSpace() / 1024.0 / 1024.0, 7, 'f', 1));
 
        if ((fsit->getTotalSpace() == -1) || (fsit->getUsedSpace() == -1))
        {
            LOG(VB_FILE, LOG_ERR, LOC +
                QString("fsID #%1 has invalid info, AutoExpire cannot run for "
                        "this filesystem.  Continuing on to next...")
                    .arg(fsit->getFSysID()));
            LOG(VB_FILE, LOG_INFO, QString("Directories on filesystem ID %1:")
                    .arg(fsit->getFSysID()));
            for (
#if QT_VERSION < QT_VERSION_CHECK(6,0,0)
                auto* fsit2 = fsInfos.begin();
#else
                auto fsit2 = fsInfos.begin();
#endif
                fsit2 != fsInfos.end(); ++fsit2)
            {
                if (fsit2->getFSysID() == fsit->getFSysID())
                {
                    LOG(VB_FILE, LOG_INFO, QString("    %1:%2")
                            .arg(fsit2->getHostname(), fsit2->getPath()));
                }
            }
 
            continue;
        }
 
        if (truncateMap.contains(fsit->getFSysID()))
        {
            LOG(VB_FILE, LOG_INFO,
                QString("    fsid %1 has a truncating delete in progress,  "
                        "AutoExpire cannot run for this filesystem until the "
                        "delete has finished.  Continuing on to next...")
                    .arg(fsit->getFSysID()));
            continue;
        }
 
        if (std::max((int64_t)0LL, fsit->getFreeSpace()) <
            m_desiredSpace[fsit->getFSysID()])
        {
            LOG(VB_FILE, LOG_INFO,
                QString("    Not Enough Free Space!  We want %1 MB")
                    .arg(m_desiredSpace[fsit->getFSysID()] / 1024));
 
            QMap<QString, int> dirList;
 
            LOG(VB_FILE, LOG_INFO,
                QString("    Directories on filesystem ID %1:")
                    .arg(fsit->getFSysID()));
 
            for (const auto& fs2 : std::as_const(fsInfos))
            {
                if (fs2.getFSysID() == fsit->getFSysID())
                {
                    LOG(VB_FILE, LOG_INFO, QString("        %1:%2")
                            .arg(fs2.getHostname(), fs2.getPath()));
                    dirList[fs2.getHostname() + ":" + fs2.getPath()] = 1;
                }
            }
 
            LOG(VB_FILE, LOG_INFO,
                "    Searching for files expirable in these directories");
            QString myHostName = gCoreContext->GetHostName();
            auto it = expireList.begin();
            while ((it != expireList.end()) &&
                   (std::max((int64_t)0LL, fsit->getFreeSpace()) <
                    m_desiredSpace[fsit->getFSysID()]))
            {
                ProgramInfo *p = *it;
                ++it;
 
                LOG(VB_FILE, LOG_INFO, QString("        Checking %1 => %2")
                        .arg(p->toString(ProgramInfo::kRecordingKey),
                             p->GetTitle()));
 
                if (!p->IsLocal())
                {
                    bool foundFile = false;
                    auto eit = m_encoderList->constBegin();
                    while (eit != m_encoderList->constEnd())
                    {
                        EncoderLink *el = *eit;
                        eit++;
 
                        if ((p->GetHostname() == el->GetHostName()) ||
                            ((p->GetHostname() == myHostName) &&
                             (el->IsLocal())))
                        {
                            if (el->IsConnected())
                                foundFile = el->CheckFile(p);
 
                            eit = m_encoderList->constEnd();
                        }
                    }
 
                    if (!foundFile && (p->GetHostname() != myHostName))
                    {
                        // Wasn't found so check locally
                        QString file = GetPlaybackURL(p);
 
                        if (file.startsWith("/"))
                        {
                            p->SetPathname(file);
                            p->SetHostname(myHostName);
                            foundFile = true;
                        }
                    }
 
                    if (!foundFile)
                    {
                        LOG(VB_FILE, LOG_ERR, LOC +
                            QString("        ERROR: Can't find file for %1")
                                .arg(p->toString(ProgramInfo::kRecordingKey)));
                        continue;
                    }
                }
 
                QFileInfo vidFile(p->GetPathname());
                if (dirList.contains(p->GetHostname() + ':' + vidFile.path()))
                {
                    fsit->setUsedSpace(fsit->getUsedSpace()
                                                - (p->GetFilesize() / 1024));
                    deleteList.push_back(p);
 
                    LOG(VB_FILE, LOG_INFO,
                        QString("        FOUND file expirable. "
                                "%1 is located at %2 which is on fsID #%3. "
                                "Adding to deleteList.  After deleting we "
                                "should have %4 MB free on this filesystem.")
                            .arg(p->toString(ProgramInfo::kRecordingKey),
                                 p->GetPathname()).arg(fsit->getFSysID())
                            .arg(fsit->getFreeSpace() / 1024));
                }
            }
        }
    }
 
    SendDeleteMessages(deleteList);
 
    ClearExpireList(deleteList, false);
    ClearExpireList(expireList);
}
 
void AutoExpire::SendDeleteMessages(pginfolist_t &deleteList)
{
    QString msg;
 
    if (deleteList.empty())
    {
        LOG(VB_FILE, LOG_INFO, LOC + "SendDeleteMessages. Nothing to expire.");
        return;
    }
 
    LOG(VB_FILE, LOG_INFO, LOC +
        "SendDeleteMessages, cycling through deleteList.");
    auto it = deleteList.begin();
    while (it != deleteList.end())
    {
        msg = QString("%1Expiring %2 MB for %3 => %4")
            .arg(VERBOSE_LEVEL_CHECK(VB_FILE, LOG_ANY) ? "    " : "",
                 QString::number((*it)->GetFilesize() >> 20),
                 (*it)->toString(ProgramInfo::kRecordingKey),
                 (*it)->toString(ProgramInfo::kTitleSubtitle));
 
        LOG(VB_GENERAL, LOG_NOTICE, msg);
 
        // send auto expire message to backend's event thread.
        MythEvent me(QString("AUTO_EXPIRE %1 %2").arg((*it)->GetChanID())
                     .arg((*it)->GetRecordingStartTime(MythDate::ISODate)));
        gCoreContext->dispatch(me);
 
        ++it; // move on to next program
    }
}
 
void AutoExpire::ExpireEpisodesOverMax(void)
{
    QMap<QString, int> maxEpisodes;
    QMap<QString, int>::Iterator maxIter;
    QMap<QString, int> episodeParts;
    QString episodeKey;
 
    MSqlQuery query(MSqlQuery::InitCon());
    query.prepare("SELECT recordid, maxepisodes, title "
                  "FROM record WHERE maxepisodes > 0 "
                  "ORDER BY recordid ASC, maxepisodes DESC");
 
    if (query.exec() && query.isActive() && query.size() > 0)
    {
        LOG(VB_FILE, LOG_INFO, LOC +
            QString("Found %1 record profiles using max episode expiration")
                .arg(query.size()));
        while (query.next())
        {
            LOG(VB_FILE, LOG_INFO, QString("    %1 (%2 for rec id %3)")
                                     .arg(query.value(2).toString())
                                     .arg(query.value(1).toInt())
                                     .arg(query.value(0).toInt()));
            maxEpisodes[query.value(0).toString()] = query.value(1).toInt();
        }
    }
 
    LOG(VB_FILE, LOG_INFO, LOC +
        "Checking episode count for each recording profile using max episodes");
    for (maxIter = maxEpisodes.begin(); maxIter != maxEpisodes.end(); ++maxIter)
    {
        query.prepare("SELECT chanid, starttime, title, progstart, progend, "
                          "duplicate "
                      "FROM recorded "
                      "WHERE recordid = :RECID AND preserve = 0 "
                      "AND recgroup NOT IN ('LiveTV', 'Deleted') "
                      "ORDER BY starttime DESC;");
        query.bindValue(":RECID", maxIter.key());
 
        if (!query.exec() || !query.isActive())
        {
            MythDB::DBError("AutoExpire query failed!", query);
            continue;
        }
 
        LOG(VB_FILE, LOG_INFO, QString("    Recordid %1 has %2 recordings.")
                                 .arg(maxIter.key())
                                 .arg(query.size()));
        if (query.size() > 0)
        {
            int found = 1;
            while (query.next())
            {
                uint chanid = query.value(0).toUInt();
                QDateTime startts = MythDate::as_utc(query.value(1).toDateTime());
                QString title = query.value(2).toString();
                QDateTime progstart = MythDate::as_utc(query.value(3).toDateTime());
                QDateTime progend = MythDate::as_utc(query.value(4).toDateTime());
                int duplicate = query.value(5).toInt();
 
                episodeKey = QString("%1_%2_%3")
                             .arg(QString::number(chanid),
                                  progstart.toString(Qt::ISODate),
                                  progend.toString(Qt::ISODate));
 
                if ((!IsInDontExpireSet(chanid, startts)) &&
                    (!episodeParts.contains(episodeKey)) &&
                    (found > *maxIter))
                {
                    QString msg =
                        QString("%1Deleting %2 at %3 => %4.  "
                                "Too many episodes, we only want to keep %5.")
                        .arg(VERBOSE_LEVEL_CHECK(VB_FILE, LOG_ANY) ? "    " : "",
                             QString::number(chanid),
                             startts.toString(Qt::ISODate),
                             title,
                             QString::number(*maxIter));
 
                    LOG(VB_GENERAL, LOG_NOTICE, msg);
 
                    // allow re-record if auto expired
                    RecordingInfo recInfo(chanid, startts);
                    if (gCoreContext->GetBoolSetting("RerecordWatched", false) ||
                        !recInfo.IsWatched())
                    {
                        recInfo.ForgetHistory();
                    }
                    msg = QString("DELETE_RECORDING %1 %2")
                                  .arg(chanid)
                                  .arg(startts.toString(Qt::ISODate));
 
                    MythEvent me(msg);
                    gCoreContext->dispatch(me);
                }
                else
                {
                    // keep track of shows we haven't expired so we can
                    // make sure we don't expire another part of the same
                    // episode.
                    if (episodeParts.contains(episodeKey))
                    {
                        episodeParts[episodeKey] = episodeParts[episodeKey] + 1;
                    }
                    else
                    {
                        episodeParts[episodeKey] = 1;
                        if( duplicate )
                            found++;
                    }
                }
            }
        }
    }
}
 
void AutoExpire::FillExpireList(pginfolist_t &expireList)
{
    int expMethod = gCoreContext->GetNumSetting("AutoExpireMethod", 1);
 
    ClearExpireList(expireList);
 
    FillDBOrdered(expireList, emNormalDeletedPrograms);
 
    switch(expMethod)
    {
        case emOldestFirst:
        case emLowestPriorityFirst:
        case emWeightedTimePriority:
                FillDBOrdered(expireList, expMethod);
                break;
        // default falls through so list is empty so no AutoExpire
    }
}
 
void AutoExpire::PrintExpireList(const QString& expHost)
{
    pginfolist_t expireList;
 
    FillExpireList(expireList);
 
    QString msg = "MythTV AutoExpire List ";
    if (expHost != "ALL")
        msg += QString("for '%1' ").arg(expHost);
    msg += "(programs listed in order of expiration)";
    std::cout << msg.toLocal8Bit().constData() << std::endl;
 
    for (auto *first : expireList)
    {
        if (expHost != "ALL" && first->GetHostname() != expHost)
            continue;
 
        QString title = first->toString(ProgramInfo::kTitleSubtitle);
        title = title.leftJustified(39, ' ', true);
 
        QString outstr = QString("%1 %2 MB %3 [%4]")
            .arg(title,
                 QString::number(first->GetFilesize() >> 20)
                 .rightJustified(5, ' ', true),
                 first->GetRecordingStartTime(MythDate::ISODate)
                 .leftJustified(24, ' ', true),
                 QString::number(first->GetRecordingPriority())
                 .rightJustified(3, ' ', true));
        QByteArray out = outstr.toLocal8Bit();
 
        std::cout << out.constData() << std::endl;
    }
 
    ClearExpireList(expireList);
}
 
void AutoExpire::GetAllExpiring(QStringList &strList)
{
    QMutexLocker lockit(&m_instanceLock);
    pginfolist_t expireList;
 
    UpdateDontExpireSet();
 
    FillDBOrdered(expireList, emShortLiveTVPrograms);
    FillDBOrdered(expireList, emNormalLiveTVPrograms);
    FillDBOrdered(expireList, emNormalDeletedPrograms);
    FillDBOrdered(expireList, gCoreContext->GetNumSetting("AutoExpireMethod",
                  emOldestFirst));
 
    strList << QString::number(expireList.size());
 
    for (auto & info : expireList)
        info->ToStringList(strList);
 
    ClearExpireList(expireList);
}
 
void AutoExpire::GetAllExpiring(pginfolist_t &list)
{
    QMutexLocker lockit(&m_instanceLock);
    pginfolist_t expireList;
 
    UpdateDontExpireSet();
 
    FillDBOrdered(expireList, emShortLiveTVPrograms);
    FillDBOrdered(expireList, emNormalLiveTVPrograms);
    FillDBOrdered(expireList, emNormalDeletedPrograms);
    FillDBOrdered(expireList, gCoreContext->GetNumSetting("AutoExpireMethod",
                  emOldestFirst));
 
    for (auto & info : expireList)
        list.push_back( new ProgramInfo( *info ));
 
    ClearExpireList(expireList);
}
 
void AutoExpire::ClearExpireList(pginfolist_t &expireList, bool deleteProg)
{
    ProgramInfo *pginfo = nullptr;
    while (!expireList.empty())
    {
        if (deleteProg)
            pginfo = expireList.back();
 
        expireList.pop_back();
 
        if (deleteProg)
            delete pginfo;
    }
}
 
void AutoExpire::FillDBOrdered(pginfolist_t &expireList, int expMethod)
{
    QString where;
    QString orderby;
    QString msg;
    int maxAge = 0;
 
    switch (expMethod)
    {
        default:
        case emOldestFirst:
            msg = "Adding programs expirable in Oldest First order";
            where = "autoexpire > 0";
            if (gCoreContext->GetBoolSetting("AutoExpireWatchedPriority", false))
                orderby = "recorded.watched DESC, ";
            orderby += "starttime ASC";
            break;
        case emLowestPriorityFirst:
            msg = "Adding programs expirable in Lowest Priority First order";
            where = "autoexpire > 0";
            if (gCoreContext->GetBoolSetting("AutoExpireWatchedPriority", false))
                orderby = "recorded.watched DESC, ";
            orderby += "recorded.recpriority ASC, starttime ASC";
            break;
        case emWeightedTimePriority:
            msg = "Adding programs expirable in Weighted Time Priority order";
            where = "autoexpire > 0";
            if (gCoreContext->GetBoolSetting("AutoExpireWatchedPriority", false))
                orderby = "recorded.watched DESC, ";
            orderby += QString("DATE_ADD(starttime, INTERVAL '%1' * "
                                        "recorded.recpriority DAY) ASC")
                      .arg(gCoreContext->GetNumSetting("AutoExpireDayPriority", 3));
            break;
        case emShortLiveTVPrograms:
            msg = "Adding Short LiveTV programs in starttime order";
            where = "recgroup = 'LiveTV' "
                    "AND endtime < DATE_ADD(starttime, INTERVAL '30' SECOND) "
                    "AND endtime <= DATE_ADD(NOW(), INTERVAL '-5' MINUTE) ";
            orderby = "starttime ASC";
            break;
        case emNormalLiveTVPrograms:
            msg = "Adding LiveTV programs in starttime order";
            where = QString("recgroup = 'LiveTV' "
                    "AND endtime <= DATE_ADD(NOW(), INTERVAL '-%1' DAY) ")
                    .arg(gCoreContext->GetNumSetting("AutoExpireLiveTVMaxAge", 1));
            orderby = "starttime ASC";
            break;
        case emOldDeletedPrograms:
            maxAge = gCoreContext->GetNumSetting("DeletedMaxAge", 0);
            if (maxAge <= 0)
                return;
            msg = QString("Adding programs deleted more than %1 days ago")
                          .arg(maxAge);
            where = QString("recgroup = 'Deleted' "
                    "AND lastmodified <= DATE_ADD(NOW(), INTERVAL '-%1' DAY) ")
                    .arg(maxAge);
            orderby = "starttime ASC";
            break;
        case emQuickDeletedPrograms:
            if (gCoreContext->GetNumSetting("DeletedMaxAge", 0) != 0)
                return;
            msg = QString("Adding programs deleted more than 5 minutes ago");
            where = QString("recgroup = 'Deleted' "
                    "AND lastmodified <= DATE_ADD(NOW(), INTERVAL '-5' MINUTE) ");
            orderby = "lastmodified ASC";
            break;
        case emNormalDeletedPrograms:
            msg = "Adding deleted programs in FIFO order";
            where = "recgroup = 'Deleted'";
            orderby = "lastmodified ASC";
            break;
    }
 
    LOG(VB_FILE, LOG_INFO, LOC + "FillDBOrdered: " + msg);
 
    MSqlQuery query(MSqlQuery::InitCon());
    QString querystr = QString(
        "SELECT recorded.chanid, starttime "
        "FROM recorded "
        "LEFT JOIN channel ON recorded.chanid = channel.chanid "
        "WHERE %1 AND deletepending = 0 "
        "ORDER BY autoexpire DESC, %2").arg(where, orderby);
 
    query.prepare(querystr);
 
    if (!query.exec())
        return;
 
    while (query.next())
    {
        uint chanid = query.value(0).toUInt();
        QDateTime recstartts = MythDate::as_utc(query.value(1).toDateTime());
 
        if (IsInDontExpireSet(chanid, recstartts))
        {
            LOG(VB_FILE, LOG_INFO, LOC +
                QString("    Skipping %1 at %2 because it is in Don't Expire "
                        "List")
                    .arg(chanid).arg(recstartts.toString(Qt::ISODate)));
        }
        else if (IsInExpireList(expireList, chanid, recstartts))
        {
            LOG(VB_FILE, LOG_INFO, LOC +
                QString("    Skipping %1 at %2 because it is already in Expire "
                        "List")
                    .arg(chanid).arg(recstartts.toString(Qt::ISODate)));
        }
        else
        {
            auto *pginfo = new ProgramInfo(chanid, recstartts);
            if (pginfo->GetChanID())
            {
                LOG(VB_FILE, LOG_INFO, LOC + QString("    Adding   %1 at %2")
                        .arg(chanid).arg(recstartts.toString(Qt::ISODate)));
                expireList.push_back(pginfo);
            }
            else
            {
                LOG(VB_FILE, LOG_INFO, LOC +
                    QString("    Skipping %1 at %2 "
                            "because it could not be loaded from the DB")
                        .arg(chanid).arg(recstartts.toString(Qt::ISODate)));
                delete pginfo;
            }
        }
    }
}
 
void AutoExpire::Update(int encoder, int fsID, bool immediately)
{
    if (!gExpirer)
        return;
 
    if (encoder > 0)
    {
        QString msg = QString("Cardid %1: is starting a recording on")
                      .arg(encoder);
        if (fsID == -1)
            msg.append(" an unknown fsID soon.");
        else
            msg.append(QString(" fsID %2 soon.").arg(fsID));
        LOG(VB_FILE, LOG_INFO, LOC + msg);
    }
 
    if (immediately)
    {
        if (encoder > 0)
        {
            gExpirer->m_instanceLock.lock();
            gExpirer->m_usedEncoders[encoder] = fsID;
            gExpirer->m_instanceLock.unlock();
        }
        gExpirer->CalcParams();
        gExpirer->m_instanceCond.wakeAll();
    }
    else
    {
        gExpirer->m_updateLock.lock();
        gExpirer->m_updateQueue.append(UpdateEntry(encoder, fsID));
        gExpirer->m_updateLock.unlock();
    }
}
 
void AutoExpire::UpdateDontExpireSet(void)
{
    m_dontExpireSet.clear();
 
    MSqlQuery query(MSqlQuery::InitCon());
    query.prepare(
        "SELECT chanid, starttime, lastupdatetime, recusage, hostname "
        "FROM inuseprograms");
 
    if (!query.exec())
        return;
 
    QDateTime curTime = MythDate::current();
    while (query.next())
    {
        if (query.at() == 0)
           LOG(VB_FILE, LOG_INFO, LOC + "Adding Programs to 'Do Not Expire' List");
        uint chanid = query.value(0).toUInt();
        QDateTime recstartts = MythDate::as_utc(query.value(1).toDateTime());
        QDateTime lastupdate = MythDate::as_utc(query.value(2).toDateTime());
 
        if (lastupdate.secsTo(curTime) < kRecentInterval)
        {
            QString key = QString("%1_%2")
                .arg(chanid).arg(recstartts.toString(Qt::ISODate));
            m_dontExpireSet.insert(key);
            LOG(VB_FILE, LOG_INFO, QString("    %1 at %2 in use by %3 on %4")
                    .arg(QString::number(chanid),
                         recstartts.toString(Qt::ISODate),
                         query.value(3).toString(),
                         query.value(4).toString()));
        }
    }
}
 
bool AutoExpire::IsInDontExpireSet(
    uint chanid, const QDateTime &recstartts) const
{
    QString key = QString("%1_%2")
        .arg(chanid).arg(recstartts.toString(Qt::ISODate));
 
    return (m_dontExpireSet.contains(key));
}
 
bool AutoExpire::IsInExpireList(
    const pginfolist_t &expireList, uint chanid, const QDateTime &recstartts)
{
    return std::any_of(expireList.cbegin(), expireList.cend(),
                       [chanid,&recstartts](auto *info)
                           { return ((info->GetChanID()             == chanid) &&
                                     (info->GetRecordingStartTime() == recstartts)); } );
}
 
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