src/base/bittorrent/bandwidthscheduler.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2017  Vladimir Golovnev <glassez@yandex.ru>
   4  * Copyright (C) 2010  Christophe Dumez <chris@qbittorrent.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * In addition, as a special exception, the copyright holders give permission to
  21  * link this program with the OpenSSL project's "OpenSSL" library (or with
  22  * modified versions of it that use the same license as the "OpenSSL" library),
  23  * and distribute the linked executables. You must obey the GNU General Public
  24  * License in all respects for all of the code used other than "OpenSSL".  If you
  25  * modify file(s), you may extend this exception to your version of the file(s),
  26  * but you are not obligated to do so. If you do not wish to do so, delete this
  27  * exception statement from your version.
  28  */
  29
  30 #include "bandwidthscheduler.h"
  31
  32 #include <chrono>
  33 #include <utility>
  34
  35 #include <QDate>
  36 #include <QTime>
  37
  38 #include "base/preferences.h"
  39
  40 using namespace std::chrono_literals;
  41
  42 BandwidthScheduler::BandwidthScheduler(QObject *parent)
  43     : QObject(parent)
  44     , m_lastAlternative(false)
  45 {
  46     connect(&m_timer, &QTimer::timeout, this, &BandwidthScheduler::onTimeout);
  47 }
  48
  49 void BandwidthScheduler::start()
  50 {
  51     m_lastAlternative = isTimeForAlternative();
  52     emit bandwidthLimitRequested(m_lastAlternative);
  53
  54     // Timeout regularly to accommodate for external system clock changes
  55     // eg from the user or from a timesync utility
  56     m_timer.start(30s);
  57 }
  58
  59 bool BandwidthScheduler::isTimeForAlternative() const
  60 {
  61     const Preferences *const pref = Preferences::instance();
  62
  63     QTime start = pref->getSchedulerStartTime();
  64     QTime end = pref->getSchedulerEndTime();
  65     const QTime now = QTime::currentTime();
  66     const Scheduler::Days schedulerDays = pref->getSchedulerDays();
  67     const int day = QDate::currentDate().dayOfWeek();
  68     bool alternative = false;
  69
  70     if (start > end)
  71     {
  72         std::swap(start, end);
  73         alternative = true;
  74     }
  75
  76     if ((start <= now) && (end >= now))
  77     {
  78         switch (schedulerDays)
  79         {
  80         case Scheduler::Days::EveryDay:
  81             alternative = !alternative;
  82             break;
  83         case Scheduler::Days::Monday:
  84         case Scheduler::Days::Tuesday:
  85         case Scheduler::Days::Wednesday:
  86         case Scheduler::Days::Thursday:
  87         case Scheduler::Days::Friday:
  88         case Scheduler::Days::Saturday:
  89         case Scheduler::Days::Sunday:
  90             {
  91                 const int offset = static_cast<int>(Scheduler::Days::Monday) - 1;
  92                 const int dayOfWeek = static_cast<int>(schedulerDays) - offset;
  93                 if (day == dayOfWeek)
  94                     alternative = !alternative;
  95             }
  96             break;
  97         case Scheduler::Days::Weekday:
  98             if ((day >= 1) && (day <= 5))
  99                 alternative = !alternative;
 100             break;
 101         case Scheduler::Days::Weekend:
 102             if ((day == 6) || (day == 7))
 103                 alternative = !alternative;
 104             break;
 105         default:
 106             Q_ASSERT(false);
 107             break;
 108         }
 109     }
 110
 111     return alternative;
 112 }
 113
 114 void BandwidthScheduler::onTimeout()
 115 {
 116     const bool alternative = isTimeForAlternative();
 117
 118     if (alternative != m_lastAlternative)
 119     {
 120         m_lastAlternative = alternative;
 121         emit bandwidthLimitRequested(alternative);
 122     }
 123 }