/// <summary>
/// Adds metadata to output, and returns the metadataset ID
/// </summary>
/// <returns>The metadataset ID.</returns>
/// <param name="path">The path for which metadata is processed.</param>
/// <param name="meta">The metadata entry.</param>
/// <param name="database">The database connection.</param>
/// <param name="streamblockchannel">The channel to write streams to.</param>
internal static async Task <Tuple <bool, long> > AddMetadataToOutputAsync(string path, IMetahash meta, BackupDatabase database, IWriteChannel <StreamBlock> streamblockchannel)
{
StreamProcessResult res;
using (var ms = new MemoryStream(meta.Blob))
res = await StreamBlock.ProcessStream(streamblockchannel, path, ms, true, CompressionHint.Default);
return(await database.AddMetadatasetAsync(res.Streamhash, res.Streamlength, res.Blocksetid));
}