[DONT MERGE] give a spec to input files

Yavsc.Abstract/FileSystem/UserDirectoryInfo.cs

@@ -0,0 +1,41 @@
+using System;
+using System.IO;
+using System.Linq;
+using Yavsc.Abstract.FileSystem;
+
+namespace Yavsc.ViewModels.UserFiles
+{
+    public class UserDirectoryInfo
+    {
+        public string UserName { get; private set; }
+        public string SubPath { get; private set; }
+        public RemoteFileInfo [] Files {
+            get; private set;
+        }
+        public string [] SubDirectories { 
+            get; private set;
+        }
+        private DirectoryInfo dInfo;
+        public UserDirectoryInfo(string userReposPath, string username, string path)
+        {
+            if (string.IsNullOrWhiteSpace(username))
+                throw new NotSupportedException("No user name, no user dir.");
+            UserName = username;
+            var finalPath =  username;
+            if (!string.IsNullOrWhiteSpace(path))
+                 finalPath += Path.DirectorySeparatorChar + path;
+            if (!finalPath.IsValidYavscPath())
+                throw new InvalidOperationException(
+                    $"File name contains invalid chars, using path {finalPath}");
+
+            dInfo = new DirectoryInfo(
+                userReposPath+FileSystemConstants.RemoteDirectorySeparator+finalPath);
+            if (!dInfo.Exists) dInfo.Create();
+            Files = dInfo.GetFiles().Select
+             ( entry => new RemoteFileInfo { Name = entry.Name, Size = entry.Length,
+             CreationTime = entry.CreationTime, LastModified = entry.LastWriteTime  }).ToArray();
+             SubDirectories = dInfo.GetDirectories().Select
+             ( d=> d.Name ).ToArray();
+        }
+    }
+}