private IBackupIndex GetUnstoredFiles(IBackupIndex existingIndex, IBackupIndex previousIndex)
{
if (previousIndex == null)
{
return(existingIndex);
}
var diffIndex = new BackupIndex();
var allPreviousFileHashes = previousIndex.GetAllNodeHashes();
foreach (var existingBackupSet in existingIndex.BackupSets)
{
var diffBackupSet = diffIndex.AddBackupSet(existingBackupSet.BasePath, existingBackupSet.Root.Name);
DiffBackupSets(existingBackupSet.Root, diffBackupSet.Root, allPreviousFileHashes);
}
return(diffIndex);
}
