public DirectoryIdentifier[] GetDirectories(DirectoryControlBlock dir, string searchPattern, SearchOption searchOptions)
{
List <DirectoryIdentifier> result;
if (searchPattern.Contains(Path.DirectorySeparatorChar) ||
searchPattern.Contains(Path.AltDirectorySeparatorChar))
{
var segments = searchPattern.Split(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
if (HasIllegalChars(segments))
{
throw new ArgumentException("Illegal characters in path");
}
result = GetDirectoryBySegments(dir, segments, 0);
return(result.ToArray());
}
result = dir.Directories.Where(d => NamePredicate(d.Name, searchPattern)).ToList();
if (searchOptions == SearchOption.TopDirectoryOnly)
{
return(result.ToArray());
}
foreach (var d in dir.Directories)
{
if (!_dirs.TryGet(d, out var b))
{
continue;
}
result.AddRange(GetDirectories(b, searchPattern, searchOptions));
}
return(result.ToArray());
}
private List <FileIdentifier> GetFilesBySegments(DirectoryControlBlock dir, string[] segments, int level)
{
var result = new List <FileIdentifier>();
var current = dir;
while (true)
{
if (level < 0 || level >= segments.Length)
{
break;
}
if (level == segments.Length - 1)
{
return(GetFiles(current, segments[level], SearchOption.TopDirectoryOnly).ToList());
}
var found = GetDirectories(current, segments[level], SearchOption.TopDirectoryOnly).ToList();
if (!found.Any())
{
throw new DirectoryNotFoundException($"Could not find part of the path '{current.Idendifier.FullName}'");
}
var nextDirId = found.First();
if (!_dirs.TryGet(nextDirId, out current))
{
throw new InvalidOperationException($"control block container is in corrupted state. failed to find control block for {nextDirId.FullName}");
}
++level;
}
return(result);
}
private bool AddOrGetSingle(DirectoryIdentifier key, out DirectoryControlBlock result)
{
var added = false;
if (!_collection.TryGetValue(key, out result))
{
result = new DirectoryControlBlock(key);
_collection[key] = result;
added = true;
}
return(added);
}
public void ForEach(DirectoryControlBlock dir, Action <DirectoryControlBlock> action)
{
action(dir);
foreach (var d in dir.Directories)
{
if (!_dirs.TryGet(d, out var b))
{
throw new InvalidOperationException($"control block container is in corrupted state. failed to find control block for {d.FullName}");
}
ForEach(b, action);
}
}
public bool TryGet(DirectoryIdentifier id, out DirectoryControlBlock result)
{
return(_collection.TryGetValue(id, out result));
}
