src/base/bittorrent/torrentcreationmanager.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2024  Vladimir Golovnev <glassez@yandex.ru>
   4  * Copyright (C) 2024  Radu Carpa <radu.carpa@cern.ch>
   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 "torrentcreationmanager.h"
  31
  32 #include <utility>
  33
  34 #include <boost/multi_index_container.hpp>
  35 #include <boost/multi_index/composite_key.hpp>
  36 #include <boost/multi_index/indexed_by.hpp>
  37 #include <boost/multi_index/mem_fun.hpp>
  38 #include <boost/multi_index/ordered_index.hpp>
  39
  40 #include <QUuid>
  41
  42 #define SETTINGS_KEY(name) u"TorrentCreator/Manager/" name
  43
  44 namespace BitTorrent
  45 {
  46     using namespace boost::multi_index;
  47
  48     class TorrentCreationManager::TaskSet final : public boost::multi_index_container<
  49             std::shared_ptr<TorrentCreationTask>,
  50             indexed_by<
  51                     ordered_unique<tag<struct ByID>, const_mem_fun<TorrentCreationTask, QString, &TorrentCreationTask::id>>,
  52                     ordered_non_unique<tag<struct ByCompletion>, composite_key<
  53                             TorrentCreationTask,
  54                             const_mem_fun<TorrentCreationTask, bool, &TorrentCreationTask::isFinished>,
  55                             const_mem_fun<TorrentCreationTask, QDateTime, &TorrentCreationTask::timeAdded>>>>>
  56     {
  57     };
  58 }
  59
  60 BitTorrent::TorrentCreationManager::TorrentCreationManager(IApplication *app, QObject *parent)
  61     : ApplicationComponent(app, parent)
  62     , m_maxTasks {SETTINGS_KEY(u"MaxTasks"_s), 256}
  63     , m_numThreads {SETTINGS_KEY(u"NumThreads"_s), 1}
  64     , m_tasks {std::make_unique<TaskSet>()}
  65 {
  66     if (m_numThreads > 0)
  67         m_threadPool.setMaxThreadCount(m_numThreads);
  68 }
  69
  70 BitTorrent::TorrentCreationManager::~TorrentCreationManager() = default;
  71
  72 std::shared_ptr<BitTorrent::TorrentCreationTask> BitTorrent::TorrentCreationManager::createTask(const TorrentCreatorParams &params, bool startSeeding)
  73 {
  74     if (std::cmp_greater_equal(m_tasks->size(), m_maxTasks.get()))
  75     {
  76         // Try to delete old finished tasks to stay under target
  77         auto &tasksByCompletion = m_tasks->get<ByCompletion>();
  78         auto [iter, endIter] = tasksByCompletion.equal_range(std::make_tuple(true));
  79         while ((iter != endIter) && std::cmp_greater_equal(m_tasks->size(), m_maxTasks.get()))
  80         {
  81             iter = tasksByCompletion.erase(iter);
  82         }
  83     }
  84     if (std::cmp_greater_equal(m_tasks->size(), m_maxTasks.get()))
  85         return {};
  86
  87     const QString taskID = generateTaskID();
  88
  89     auto *torrentCreator = new TorrentCreator(params, this);
  90     auto creationTask = std::make_shared<TorrentCreationTask>(app(), taskID, torrentCreator, startSeeding);
  91     connect(creationTask.get(), &QObject::destroyed, torrentCreator, &BitTorrent::TorrentCreator::requestInterruption);
  92
  93     m_tasks->get<ByID>().insert(creationTask);
  94     m_threadPool.start(torrentCreator);
  95
  96     return creationTask;
  97 }
  98
  99 QString BitTorrent::TorrentCreationManager::generateTaskID() const
 100 {
 101     const auto &tasksByID = m_tasks->get<ByID>();
 102     QString taskID = QUuid::createUuid().toString(QUuid::WithoutBraces);
 103     while (tasksByID.find(taskID) != tasksByID.end())
 104         taskID = QUuid::createUuid().toString(QUuid::WithoutBraces);
 105
 106     return taskID;
 107 }
 108
 109 std::shared_ptr<BitTorrent::TorrentCreationTask> BitTorrent::TorrentCreationManager::getTask(const QString &id) const
 110 {
 111     const auto &tasksByID = m_tasks->get<ByID>();
 112     const auto iter = tasksByID.find(id);
 113     if (iter == tasksByID.end())
 114         return nullptr;
 115
 116     return *iter;
 117 }
 118
 119 QList<std::shared_ptr<BitTorrent::TorrentCreationTask>> BitTorrent::TorrentCreationManager::tasks() const
 120 {
 121     const auto &tasksByCompletion = m_tasks->get<ByCompletion>();
 122     return {tasksByCompletion.cbegin(), tasksByCompletion.cend()};
 123 }
 124
 125 bool BitTorrent::TorrentCreationManager::deleteTask(const QString &id)
 126 {
 127     auto &tasksByID = m_tasks->get<ByID>();
 128     const auto iter = tasksByID.find(id);
 129     if (iter == tasksByID.end())
 130         return false;
 131
 132     tasksByID.erase(iter);
 133     return true;
 134 }