jellyfin/MediaBrowser.Api/Library/LibraryHelpers.cs
2014-01-01 13:26:31 -05:00

155 lines
6.6 KiB
C#

using MediaBrowser.Common.IO;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Entities;
using System;
using System.IO;
using System.Linq;
namespace MediaBrowser.Api.Library
{
/// <summary>
/// Class LibraryHelpers
/// </summary>
public static class LibraryHelpers
{
/// <summary>
/// The shortcut file extension
/// </summary>
private const string ShortcutFileExtension = ".mblink";
/// <summary>
/// The shortcut file search
/// </summary>
private const string ShortcutFileSearch = "*" + ShortcutFileExtension;
/// <summary>
/// Deletes a shortcut from within a virtual folder, within either the default view or a user view
/// </summary>
/// <param name="fileSystem">The file system.</param>
/// <param name="virtualFolderName">Name of the virtual folder.</param>
/// <param name="mediaPath">The media path.</param>
/// <param name="user">The user.</param>
/// <param name="appPaths">The app paths.</param>
/// <exception cref="System.IO.DirectoryNotFoundException">The media folder does not exist</exception>
public static void RemoveMediaPath(IFileSystem fileSystem, string virtualFolderName, string mediaPath, User user, IServerApplicationPaths appPaths)
{
var rootFolderPath = user != null ? user.RootFolderPath : appPaths.DefaultUserViewsPath;
var path = Path.Combine(rootFolderPath, virtualFolderName);
if (!Directory.Exists(path))
{
throw new DirectoryNotFoundException(string.Format("The media collection {0} does not exist", virtualFolderName));
}
var shortcut = Directory.EnumerateFiles(path, ShortcutFileSearch, SearchOption.AllDirectories).FirstOrDefault(f => fileSystem.ResolveShortcut(f).Equals(mediaPath, StringComparison.OrdinalIgnoreCase));
if (!string.IsNullOrEmpty(shortcut))
{
File.Delete(shortcut);
}
}
/// <summary>
/// Adds an additional mediaPath to an existing virtual folder, within either the default view or a user view
/// </summary>
/// <param name="fileSystem">The file system.</param>
/// <param name="virtualFolderName">Name of the virtual folder.</param>
/// <param name="path">The path.</param>
/// <param name="user">The user.</param>
/// <param name="appPaths">The app paths.</param>
/// <exception cref="System.ArgumentException">The path is not valid.</exception>
/// <exception cref="System.IO.DirectoryNotFoundException">The path does not exist.</exception>
public static void AddMediaPath(IFileSystem fileSystem, string virtualFolderName, string path, User user, IServerApplicationPaths appPaths)
{
if (!Directory.Exists(path))
{
throw new DirectoryNotFoundException("The path does not exist.");
}
var rootFolderPath = user != null ? user.RootFolderPath : appPaths.DefaultUserViewsPath;
var virtualFolderPath = Path.Combine(rootFolderPath, virtualFolderName);
ValidateNewMediaPath(fileSystem, rootFolderPath, path);
var shortcutFilename = Path.GetFileNameWithoutExtension(path);
var lnk = Path.Combine(virtualFolderPath, shortcutFilename + ShortcutFileExtension);
while (File.Exists(lnk))
{
shortcutFilename += "1";
lnk = Path.Combine(virtualFolderPath, shortcutFilename + ShortcutFileExtension);
}
fileSystem.CreateShortcut(lnk, path);
}
/// <summary>
/// Validates that a new media path can be added
/// </summary>
/// <param name="fileSystem">The file system.</param>
/// <param name="currentViewRootFolderPath">The current view root folder path.</param>
/// <param name="mediaPath">The media path.</param>
/// <exception cref="System.ArgumentException">
/// </exception>
private static void ValidateNewMediaPath(IFileSystem fileSystem, string currentViewRootFolderPath, string mediaPath)
{
var pathsInCurrentVIew = Directory.EnumerateFiles(currentViewRootFolderPath, ShortcutFileSearch, SearchOption.AllDirectories)
.Select(fileSystem.ResolveShortcut)
.ToList();
// Don't allow duplicate sub-paths within the same user library, or it will result in duplicate items
// See comments in IsNewPathValid
var duplicate = pathsInCurrentVIew
.FirstOrDefault(p => !IsNewPathValid(fileSystem, mediaPath, p));
if (!string.IsNullOrEmpty(duplicate))
{
throw new ArgumentException(string.Format("The path cannot be added to the library because {0} already exists.", duplicate));
}
// Make sure the current root folder doesn't already have a shortcut to the same path
duplicate = pathsInCurrentVIew
.FirstOrDefault(p => string.Equals(mediaPath, p, StringComparison.OrdinalIgnoreCase));
if (!string.IsNullOrEmpty(duplicate))
{
throw new ArgumentException(string.Format("The path {0} already exists in the library", mediaPath));
}
}
/// <summary>
/// Validates that a new path can be added based on an existing path
/// </summary>
/// <param name="fileSystem">The file system.</param>
/// <param name="newPath">The new path.</param>
/// <param name="existingPath">The existing path.</param>
/// <returns><c>true</c> if [is new path valid] [the specified new path]; otherwise, <c>false</c>.</returns>
private static bool IsNewPathValid(IFileSystem fileSystem, string newPath, string existingPath)
{
// Example: D:\Movies is the existing path
// D:\ cannot be added
// Neither can D:\Movies\Kids
// A D:\Movies duplicate is ok here since that will be caught later
if (string.Equals(newPath, existingPath, StringComparison.OrdinalIgnoreCase))
{
return true;
}
// If enforceSubPathRestriction is true, validate the D:\Movies\Kids scenario
if (fileSystem.ContainsSubPath(existingPath, newPath))
{
return false;
}
// Validate the D:\ scenario
if (fileSystem.ContainsSubPath(newPath, existingPath))
{
return false;
}
return true;
}
}
}