/// <summary>Display a tree of a directory's children</summary>
public static async Task Tree(string[] path, IVarTuple extras, IFdbDatabase db, TextWriter log, CancellationToken ct)
{
log = log ?? Console.Out;
Program.Comment(log, $"# Tree of {String.Join("/", path)}:");
FdbDirectorySubspace root = null;
if (path.Length > 0)
{
root = await db.Directory.TryOpenAsync(db, path, ct : ct);
}
await TreeDirectoryWalk(root, new List <bool>(), db, log, ct);
Program.Comment(log, "# done");
}
/// <summary>Display a tree of a directory's children</summary>
public static async Task Tree(string[] path, IFdbTuple extras, IFdbDatabase db, TextWriter log, CancellationToken ct)
{
if (log == null)
{
log = Console.Out;
}
log.WriteLine("# Tree of {0}:", String.Join("/", path));
FdbDirectorySubspace root = null;
if (path.Length > 0)
{
root = await db.Directory.TryOpenAsync(path, cancellationToken : ct);
}
await TreeDirectoryWalk(root, new List <bool>(), db, log, ct);
log.WriteLine("# done");
}
private static async Task TreeDirectoryWalk(FdbDirectorySubspace folder, List <bool> last, IFdbDatabase db, TextWriter stream, CancellationToken ct)
{
ct.ThrowIfCancellationRequested();
var sb = new StringBuilder(last.Count * 4);
if (last.Count > 0)
{
for (int i = 0; i < last.Count - 1; i++)
{
sb.Append(last[i] ? " " : "| ");
}
sb.Append(last[last.Count - 1] ? "`-- " : "|-- ");
}
IFdbDirectory node;
if (folder == null)
{
stream.WriteLine(sb.ToString() + "<root>");
node = db.Directory;
}
else
{
stream.WriteLine($"{sb}{(folder.Layer.ToString() == "partition" ? ("<" + folder.Name + ">") : folder.Name)}{(folder.Layer.IsNullOrEmpty ? string.Empty : (" [" + folder.Layer.ToString() + "]"))}");
node = folder;
}
var children = await Fdb.Directory.BrowseAsync(db, node, ct);
int n = children.Count;
foreach (var child in children)
{
last.Add((n--) == 1);
await TreeDirectoryWalk(child.Value, last, db, stream, ct);
last.RemoveAt(last.Count - 1);
}
}
