public async Task <List <RelocatableTorrentCandidate> > FindRelocatableTorrentCandidatesAsync(MapTorrentsToDiskRequest request)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
var relocatableTorrentCandidates = new List <RelocatableTorrentCandidate>();
if (request.PathsToScan == null || request.TorrentIds == null)
{
return(relocatableTorrentCandidates);
}
var torrents = await _torrentClient.GetTorrentsByIDsAsync(request.TorrentIds);
_logger.LogDebug("Found {0} torrents", torrents.Count());
var extensionsWhitelist = torrents
.SelectMany(t => t.Files)
.Select(tf => Path.GetExtension(tf.FileLocationInTorrent))
.Distinct()
.ToArray();
var filePathsByFileNameLookup = GetFilePathsByFileNameLookup(request.PathsToScan, extensionsWhitelist);
_logger.LogDebug("Found {0} files to go through", filePathsByFileNameLookup.Count);
foreach (var torrent in torrents)
{
_logger.LogDebug("Looking for data matching torrent {0}", torrent.Name);
var largestFileSize = torrent.Files.Max(f => f.SizeInBytes);
var biggestFileInTorrent = torrent.Files.First(f => f.SizeInBytes == largestFileSize);
var fileNameToSearch = Path.GetFileName(biggestFileInTorrent.FileLocationInTorrent);
_logger.LogDebug("Searching for a file named '{0}' with a size around {1}B", fileNameToSearch, largestFileSize);
var matchingFiles = filePathsByFileNameLookup.Contains(fileNameToSearch)
? filePathsByFileNameLookup[fileNameToSearch].Select(f => new FileInfo(f))
: Array.Empty <FileInfo>();
_logger.LogDebug("Found {0} matches by filename: {1}", matchingFiles.Count(),
string.Join(", ", matchingFiles.Select(fi => $"<{fi.Name}, {fi.Length}B>")));
matchingFiles = matchingFiles
.Where(fi => fi.Length == biggestFileInTorrent.SizeInBytes)
.ToArray();
if (!matchingFiles.Any())
{
_logger.LogDebug("No matching files found by filename and size");
}
else
{
_logger.LogDebug("Found {0} matches by filename and size: {1}", matchingFiles.Count(),
string.Join(", ", matchingFiles.Select(fi => $"<{fi.Name}, {fi.Length}B>")));
}
var candidates = CreateTorrentRelocateCandidates(biggestFileInTorrent, matchingFiles);
candidates = GetCandidatesThatMatchAllTorrentFiles(torrent, candidates);
relocatableTorrentCandidates.Add(new RelocatableTorrentCandidate
{
TorrentID = torrent.ID,
TorrentName = torrent.Name,
TorrentFilePaths = torrent.Files.Select(t => t.FileLocationInTorrent).ToList(),
RelocateOptions = candidates,
ChosenOption = candidates.FirstOrDefault()
});
}
return(relocatableTorrentCandidates);
}