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 <utility>
  33
  34 #include <QDate>
  35 #include <QTime>
  36 #include <QTimer>
  37
  38 #include "base/preferences.h"
  39
  40 BandwidthScheduler::BandwidthScheduler(QObject *parent)
  41     : QObject(parent)
  42     , m_lastAlternative(false)
  43 {
  44     connect(&m_timer, &QTimer::timeout, this, &BandwidthScheduler::onTimeout);
  45 }
  46
  47 void BandwidthScheduler::start()
  48 {
  49     m_lastAlternative = isTimeForAlternative();
  50     emit bandwidthLimitRequested(m_lastAlternative);
  51
  52     // Timeout regularly to accommodate for external system clock changes
  53     // eg from the user or from a timesync utility
  54     m_timer.start(30000);
  55 }
  56
  57 bool BandwidthScheduler::isTimeForAlternative() const
  58 {
  59     const Preferences *const pref = Preferences::instance();
  60
  61     QTime start = pref->getSchedulerStartTime();
  62     QTime end = pref->getSchedulerEndTime();
  63     const QTime now = QTime::currentTime();
  64     const int schedulerDays = pref->getSchedulerDays();
  65     const int day = QDate::currentDate().dayOfWeek();
  66     bool alternative = false;
  67
  68     if (start > end)
  69     {
  70         std::swap(start, end);
  71         alternative = true;
  72     }
  73
  74     if ((start <= now) && (end >= now))
  75     {
  76         switch (schedulerDays)
  77         {
  78         case EVERY_DAY:
  79             alternative = !alternative;
  80             break;
  81         case WEEK_ENDS:
  82             if ((day == 6) || (day == 7))
  83                 alternative = !alternative;
  84             break;
  85         case WEEK_DAYS:
  86             if ((day != 6) && (day != 7))
  87                 alternative = !alternative;
  88             break;
  89         default:
  90             if (day == (schedulerDays - 2))
  91                 alternative = !alternative;
  92         }
  93     }
  94
  95     return alternative;
  96 }
  97
  98 void BandwidthScheduler::onTimeout()
  99 {
 100     const bool alternative = isTimeForAlternative();
 101
 102     if (alternative != m_lastAlternative)
 103     {
 104         m_lastAlternative = alternative;
 105         emit bandwidthLimitRequested(alternative);
 106     }
 107 }