src/base/bittorrent/filesearcher.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2020  Vladimir Golovnev <glassez@yandex.ru>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  * In addition, as a special exception, the copyright holders give permission to
  20  * link this program with the OpenSSL project's "OpenSSL" library (or with
  21  * modified versions of it that use the same license as the "OpenSSL" library),
  22  * and distribute the linked executables. You must obey the GNU General Public
  23  * License in all respects for all of the code used other than "OpenSSL".  If you
  24  * modify file(s), you may extend this exception to your version of the file(s),
  25  * but you are not obligated to do so. If you do not wish to do so, delete this
  26  * exception statement from your version.
  27  */
  28
  29 #include "filesearcher.h"
  30 #include "base/bittorrent/common.h"
  31 #include "base/bittorrent/infohash.h"
  32
  33 void FileSearcher::search(const BitTorrent::TorrentID &id, const PathList &originalFileNames
  34                           , const Path &savePath, const Path &downloadPath, const bool forceAppendExt)
  35 {
  36     const auto findInDir = [](const Path &dirPath, PathList &fileNames, const bool forceAppendExt) -> bool
  37     {
  38         bool found = false;
  39         for (Path &fileName : fileNames)
  40         {
  41             if ((dirPath / fileName).exists())
  42             {
  43                 found = true;
  44             }
  45             else
  46             {
  47                 const Path incompleteFilename = fileName + QB_EXT;
  48                 if ((dirPath / incompleteFilename).exists())
  49                 {
  50                     found = true;
  51                     fileName = incompleteFilename;
  52                 }
  53                 else if (forceAppendExt)
  54                 {
  55                     fileName = incompleteFilename;
  56                 }
  57             }
  58         }
  59
  60         return found;
  61     };
  62
  63     Path usedPath = savePath;
  64     PathList adjustedFileNames = originalFileNames;
  65     const bool found = findInDir(usedPath, adjustedFileNames, (forceAppendExt && downloadPath.isEmpty()));
  66     if (!found && !downloadPath.isEmpty())
  67     {
  68         usedPath = downloadPath;
  69         findInDir(usedPath, adjustedFileNames, forceAppendExt);
  70     }
  71
  72     emit searchFinished(id, usedPath, adjustedFileNames);
  73 }