public static TorrentInfo ParseInfoSection(BDictionary dic)
{
var info = new TorrentInfo();
bool?singleFile = null;
foreach (var(key, value) in dic)
{
if (key == Constants.InfoNameKey)
{
info.Name = (BString)value;
}
else if (key == Constants.InfoLengthKey)
{
if (singleFile == false)
{
throw new ParsingException(MalformedTorrent);
}
singleFile = true;
info.Files.Add((null, (BNumber)value));
}
else if (key == Constants.InfoPieceLengthKey)
{
info.PieceLength = (BNumber)value;
}
else if (key == Constants.InfoPiecesKey)
{
info.Pieces = (BString)value;
}
else if (key == Constants.InfoFilesKey)
{
if (singleFile == true)
{
throw new ParsingException(MalformedTorrent);
}
singleFile = false;
info.Files.AddRange(((BList)value).Select(_ =>
{
var dict = (BDictionary)_;
return((BList)dict[Constants.InfoFilePathKey], (BNumber)dict[Constants.InfoFileLengthKey]);
}));
}
else
{
info.Extensions.Add(key, value);
}
}
if (info.Files.Count <= 0 || info.PieceLength <= 0 || info.Pieces == null)
{
throw new ParsingException(MalformedTorrent);
}
return(info);
}
public static BDictionary GetInfoDictionary(TorrentInfo info)
{
var infoDic = new BDictionary
{
{ Constants.InfoPieceLengthKey, info.PieceLength },
{ Constants.InfoPiecesKey, info.Pieces }
};
if (info.Name != null)
{
infoDic.Add(Constants.InfoNameKey, info.Name);
}
foreach (var(key, value) in info.Extensions)
{
infoDic.Add(key, value);
}
if (info.Files.Count == 1)
{
var(path, len) = info.Files[0];
infoDic.Add(Constants.InfoLengthKey, len);
}
else
{
var lst = new BList(info.Files.Count);
foreach (var(key, value) in info.Files)
{
var fdic = new BDictionary
{
{ Constants.InfoFilePathKey, key },
{ Constants.InfoFileLengthKey, value }
};
lst.Add(fdic);
}
infoDic.Add(Constants.InfoFilesKey, lst);
}
return(infoDic);
}