// implementation
/// <summary>
/// Enumerate child data folders in a parent data folder
/// </summary>
/// <param name="parentFolder">
/// A folder in a tree whose children to enumerate.
/// </param>
/// <param name="level">
/// The level number of folders being enumerated, according to the current depth (not an index in <see cref="_levelTraits"/>)
/// </param>
/// <returns></returns>
private List <IRepoFileContainerDescriptor> EnumerateChildren(IRepoFileContainerDescriptor parentFolder, int level)
{
Check.Require(level >= Constants.DataFolderLevelLeaf && level < LevelCount);
ICalendarHistoricalFolderTraits traits = GetLevelTraits(level);
string parentAbsolutePath = GetAbsolutePath(parentFolder);
IEnumerable <string> allDirPaths = DirectoryProvider.EnumerateDirectories(parentAbsolutePath, traits.NameMask);
List <IRepoFileContainerDescriptor> retval = new List <IRepoFileContainerDescriptor>();
foreach (string name in allDirPaths.Select((p) => DirectoryProvider.GetLastPathComponent(p)))
{
CalendarHistoricalFolderInternalDescriptor internalDesc = traits.GetDescriptor(parentFolder, name);
if (null != internalDesc)
{
IRepoFileContainerDescriptor descr = GetDescriptor(parentFolder, internalDesc);
retval.Add(descr);
}
else
{
_log.WarnFormat("Data folder name {0}/{1} is malformed, ignoring", parentFolder == null ? "" : parentFolder.RelativePath, name);
}
}
return(retval);
}