164 lines
3.6 KiB
C++
164 lines
3.6 KiB
C++
/*
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* This file Copyright (C) 2009-2015 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#include <iostream>
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#include <QDir>
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#include <QFileSystemWatcher>
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#include <QTimer>
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#include <libtransmission/transmission.h>
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#include "Prefs.h"
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#include "TorrentModel.h"
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#include "WatchDir.h"
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/***
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****
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***/
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WatchDir::WatchDir(TorrentModel const& model) :
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myModel(model),
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myWatcher(nullptr)
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{
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}
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/***
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****
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***/
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int WatchDir::metainfoTest(QString const& filename) const
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{
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int ret;
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tr_info inf;
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tr_ctor* ctor = tr_ctorNew(nullptr);
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// parse
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tr_ctorSetMetainfoFromFile(ctor, filename.toUtf8().constData());
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int const err = tr_torrentParse(ctor, &inf);
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if (err != 0)
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{
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ret = ERROR;
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}
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else if (myModel.hasTorrent(QString::fromUtf8(inf.hashString)))
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{
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ret = DUPLICATE;
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}
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else
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{
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ret = OK;
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}
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// cleanup
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if (err == 0)
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{
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tr_metainfoFree(&inf);
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}
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tr_ctorFree(ctor);
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return ret;
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}
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void WatchDir::onTimeout()
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{
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auto* t = qobject_cast<QTimer*>(sender());
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QString const filename = t->objectName();
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if (metainfoTest(filename) == OK)
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{
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emit torrentFileAdded(filename);
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}
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t->deleteLater();
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}
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void WatchDir::setPath(QString const& path, bool isEnabled)
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{
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// clear out any remnants of the previous watcher, if any
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myWatchDirFiles.clear();
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if (myWatcher != nullptr)
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{
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delete myWatcher;
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myWatcher = nullptr;
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}
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// maybe create a new watcher
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if (isEnabled)
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{
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myWatcher = new QFileSystemWatcher();
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myWatcher->addPath(path);
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connect(myWatcher, SIGNAL(directoryChanged(QString)), this, SLOT(watcherActivated(QString)));
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// std::cerr << "watching " << qPrintable(path) << " for new .torrent files" << std::endl;
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QTimer::singleShot(0, this, SLOT(rescanAllWatchedDirectories())); // trigger the watchdir for .torrent files in there already
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}
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}
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void WatchDir::watcherActivated(QString const& path)
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{
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QDir const dir(path);
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// get the list of files currently in the watch directory
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QSet<QString> files;
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for (QString const& str : dir.entryList(QDir::Readable | QDir::Files))
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{
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files.insert(str);
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}
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// try to add any new files which end in .torrent
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QSet<QString> const newFiles(files - myWatchDirFiles);
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QString const torrentSuffix = QString::fromUtf8(".torrent");
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for (QString const& name : newFiles)
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{
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if (name.endsWith(torrentSuffix, Qt::CaseInsensitive))
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{
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QString const filename = dir.absoluteFilePath(name);
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switch (metainfoTest(filename))
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{
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case OK:
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emit torrentFileAdded(filename);
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break;
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case DUPLICATE:
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break;
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case ERROR:
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{
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// give the .torrent a few seconds to finish downloading
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auto* t = new QTimer(this);
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t->setObjectName(dir.absoluteFilePath(name));
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t->setSingleShot(true);
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connect(t, SIGNAL(timeout()), this, SLOT(onTimeout()));
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t->start(5000);
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}
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}
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}
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}
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// update our file list so that we can use it
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// for comparison the next time around
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myWatchDirFiles = files;
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}
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void WatchDir::rescanAllWatchedDirectories()
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{
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if (myWatcher == nullptr)
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{
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return;
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}
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for (QString const& path : myWatcher->directories())
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{
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watcherActivated(path);
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}
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}
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