//******************************************************************************************************//  DirectoryBrowserOperations.cs - Gbtc////  Copyright © 2016, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the MIT License (MIT), the "License"; you may not use this//  file except in compliance with the License. You may obtain a copy of the License at:////      http://opensource.org/licenses/MIT////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  08/08/2016 - J. Ritchie Carroll//       Generated original version of source code.////****************************************************************************************************** using System;using System.Collections.Generic;using System.IO;using System.Linq;using GSF.IO; namespace GSF.Web.Model.HubOperations{    /// <summary>    /// Defines an interface for <see cref="DirectoryBrowserOperations"/> to make sure all needed methods    /// are implemented in a hub when using the DirectoryBrowserOperations.cshtml view.    /// </summary>    public interface IDirectoryBrowserOperations    {        /// <summary>        /// Retrieves list of directories from specified <paramref name="rootFolder"/>.        /// </summary>        /// <param name="rootFolder">Folder to load directories from.</param>        /// <param name="showHidden"><c>true</c> to show hidden directories; otherwise, <c>false</c>.</param>        /// <returns>List of directories from specified <paramref name="rootFolder"/>.</returns>        IEnumerable<string> LoadDirectories(string rootFolder, bool showHidden);         /// <summary>        /// Determines if the specified <paramref name="path"/> is a logical drive, e.g., C:\.        /// </summary>        /// <param name="path">Path to test.</param>        /// <returns><c>true</c> if the specified <paramref name="path"/> is a logical drive; otherwise, <c>false</c>.</returns>        bool IsLogicalDrive(string path);         /// <summary>        /// Resolves the specified <paramref name="path"/> to an absolute full path and expands any environmental variables.        /// </summary>        /// <param name="path">Path to resolve.</param>        /// <returns></returns>        string ResolvePath(string path);         /// <summary>        /// Combines the specified <paramref name="path1"/> and <paramref name="path2"/> strings into a single path.        /// </summary>        /// <param name="path1">The first path to combine.</param>        /// <param name="path2">The second path to combine.</param>        /// <returns>The combined paths.</returns>        string CombinePath(string path1, string path2);         /// <summary>        /// Creates all directories and subdirectories in the specified <paramref name="path"/> unless they already exist.        /// </summary>        /// <param name="path">The directory to create.</param>        void CreatePath(string path);    }     /// <summary>    /// Represents hub based operations for the DirectoryBrowserOperations.cshtml view.    /// </summary>    public static class DirectoryBrowserOperations    {        /// <summary>        /// Retrieves list of directories from specified <paramref name="rootFolder"/>.        /// </summary>        /// <param name="rootFolder">Folder to load directories from.</param>        /// <param name="showHidden"><c>true</c> to show hidden directories; otherwise, <c>false</c>.</param>        /// <returns>List of directories from specified <paramref name="rootFolder"/>.</returns>        public static IEnumerable<string> LoadDirectories(string rootFolder, bool showHidden)        {            if (string.IsNullOrWhiteSpace(rootFolder))                return Directory.GetLogicalDrives();             IEnumerable<string> directories = Directory.GetDirectories(rootFolder);             if (!showHidden)                directories = directories.Where(path => !new DirectoryInfo(path).Attributes.HasFlag(FileAttributes.Hidden));             return new[] { "..\\" }.Concat(directories.Select(path => FilePath.AddPathSuffix(FilePath.GetLastDirectoryName(path))));        }         /// <summary>        /// Determines if the specified <paramref name="path"/> is a logical drive, e.g., C:\.        /// </summary>        /// <param name="path">Path to test.</param>        /// <returns><c>true</c> if the specified <paramref name="path"/> is a logical drive; otherwise, <c>false</c>.</returns>        public static bool IsLogicalDrive(string path)        {            if (string.IsNullOrWhiteSpace(path))                return false;             DirectoryInfo info = new DirectoryInfo(path);            return info.FullName == info.Root.FullName;        }         /// <summary>        /// Resolves the specified <paramref name="path"/> to an absolute full path and expands any environmental variables.        /// </summary>        /// <param name="path">Path to resolve.</param>        /// <returns></returns>        public static string ResolvePath(string path)        {            if (IsLogicalDrive(path) && Path.GetFullPath(path) == path)                return path;             return Path.GetFullPath(FilePath.GetAbsolutePath(Environment.ExpandEnvironmentVariables(path)));        }         /// <summary>        /// Combines the specified <paramref name="path1"/> and <paramref name="path2"/> strings into a single path.        /// </summary>        /// <param name="path1">The first path to combine.</param>        /// <param name="path2">The second path to combine.</param>        /// <returns>The combined paths.</returns>        public static string CombinePath(string path1, string path2)        {            return Path.Combine(path1, path2);        }         /// <summary>        /// Creates all directories and subdirectories in the specified <paramref name="path"/> unless they already exist.        /// </summary>        /// <param name="path">The directory to create.</param>        public static void CreatePath(string path)        {            Directory.CreateDirectory(path);        }    }}