jellyfin/MediaBrowser.Controller/IO/FileSystem.cs

336 lines
12 KiB
C#
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using System;
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using System.Collections.Generic;
using System.Collections.Specialized;
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using System.IO;
using System.Runtime.InteropServices;
using System.Text;
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namespace MediaBrowser.Controller.IO
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{
/// <summary>
/// Class FileSystem
/// </summary>
public static class FileSystem
{
/// <summary>
/// Gets information about a path
/// </summary>
/// <param name="path">The path.</param>
/// <returns>System.Nullable{WIN32_FIND_DATA}.</returns>
/// <exception cref="System.ArgumentNullException">path</exception>
/// <exception cref="System.IO.IOException">GetFileData failed for + path</exception>
public static WIN32_FIND_DATA? GetFileData(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
WIN32_FIND_DATA data;
var handle = NativeMethods.FindFirstFileEx(path, FINDEX_INFO_LEVELS.FindExInfoBasic, out data,
FINDEX_SEARCH_OPS.FindExSearchNameMatch, IntPtr.Zero, FindFirstFileExFlags.NONE);
var getFilename = false;
if (handle == NativeMethods.INVALID_HANDLE_VALUE && !Path.HasExtension(path))
{
if (!path.EndsWith("*", StringComparison.OrdinalIgnoreCase))
{
NativeMethods.FindClose(handle);
handle = NativeMethods.FindFirstFileEx(Path.Combine(path, "*"), FINDEX_INFO_LEVELS.FindExInfoBasic, out data,
FINDEX_SEARCH_OPS.FindExSearchNameMatch, IntPtr.Zero, FindFirstFileExFlags.NONE);
getFilename = true;
}
}
if (handle == IntPtr.Zero)
{
throw new IOException("GetFileData failed for " + path);
}
NativeMethods.FindClose(handle);
// According to MSDN documentation, this will default to 1601 for paths that don't exist.
if (data.CreationTimeUtc.Year == 1601)
{
return null;
}
if (getFilename)
{
data.cFileName = Path.GetFileName(path);
}
data.Path = path;
return data;
}
/// <summary>
/// Gets all files within a folder
/// </summary>
/// <param name="path">The path.</param>
/// <param name="searchPattern">The search pattern.</param>
/// <returns>IEnumerable{WIN32_FIND_DATA}.</returns>
public static IEnumerable<WIN32_FIND_DATA> GetFiles(string path, string searchPattern = "*")
{
return GetFileSystemEntries(path, searchPattern, includeDirectories: false);
}
/// <summary>
/// Gets all sub-directories within a folder
/// </summary>
/// <param name="path">The path.</param>
/// <returns>IEnumerable{WIN32_FIND_DATA}.</returns>
public static IEnumerable<WIN32_FIND_DATA> GetDirectories(string path)
{
return GetFileSystemEntries(path, includeFiles: false);
}
/// <summary>
/// Gets all file system entries within a foler
/// </summary>
/// <param name="path">The path.</param>
/// <param name="searchPattern">The search pattern.</param>
/// <param name="includeFiles">if set to <c>true</c> [include files].</param>
/// <param name="includeDirectories">if set to <c>true</c> [include directories].</param>
/// <returns>IEnumerable{WIN32_FIND_DATA}.</returns>
/// <exception cref="System.ArgumentNullException">path</exception>
/// <exception cref="System.IO.IOException">GetFileSystemEntries failed</exception>
public static IEnumerable<WIN32_FIND_DATA> GetFileSystemEntries(string path, string searchPattern = "*", bool includeFiles = true, bool includeDirectories = true)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
var lpFileName = Path.Combine(path, searchPattern);
WIN32_FIND_DATA lpFindFileData;
var handle = NativeMethods.FindFirstFileEx(lpFileName, FINDEX_INFO_LEVELS.FindExInfoBasic, out lpFindFileData,
FINDEX_SEARCH_OPS.FindExSearchNameMatch, IntPtr.Zero, FindFirstFileExFlags.FIND_FIRST_EX_LARGE_FETCH);
if (handle == IntPtr.Zero)
{
var hr = Marshal.GetLastWin32Error();
if (hr != 2 && hr != 0x12)
{
throw new IOException("GetFileSystemEntries failed");
}
yield break;
}
if (IncludeInFindFileOutput(lpFindFileData.cFileName, lpFindFileData.dwFileAttributes, includeFiles, includeDirectories))
{
lpFindFileData.Path = Path.Combine(path, lpFindFileData.cFileName);
yield return lpFindFileData;
}
while (NativeMethods.FindNextFile(handle, out lpFindFileData) != IntPtr.Zero)
{
if (IncludeInFindFileOutput(lpFindFileData.cFileName, lpFindFileData.dwFileAttributes, includeFiles, includeDirectories))
{
lpFindFileData.Path = Path.Combine(path, lpFindFileData.cFileName);
yield return lpFindFileData;
}
}
NativeMethods.FindClose(handle);
}
/// <summary>
/// Includes the in find file output.
/// </summary>
/// <param name="cFileName">Name of the c file.</param>
/// <param name="attributes">The attributes.</param>
/// <param name="includeFiles">if set to <c>true</c> [include files].</param>
/// <param name="includeDirectories">if set to <c>true</c> [include directories].</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
public static bool IncludeInFindFileOutput(string cFileName, FileAttributes attributes, bool includeFiles, bool includeDirectories)
{
if (cFileName.Equals(".", StringComparison.OrdinalIgnoreCase))
{
return false;
}
if (cFileName.Equals("..", StringComparison.OrdinalIgnoreCase))
{
return false;
}
if (!includeFiles && !attributes.HasFlag(FileAttributes.Directory))
{
return false;
}
if (!includeDirectories && attributes.HasFlag(FileAttributes.Directory))
{
return false;
}
return true;
}
/// <summary>
/// The space char
/// </summary>
private const char SpaceChar = ' ';
/// <summary>
/// The invalid file name chars
/// </summary>
private static readonly char[] InvalidFileNameChars = Path.GetInvalidFileNameChars();
/// <summary>
/// Takes a filename and removes invalid characters
/// </summary>
/// <param name="filename">The filename.</param>
/// <returns>System.String.</returns>
/// <exception cref="System.ArgumentNullException">filename</exception>
public static string GetValidFilename(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentNullException("filename");
}
foreach (var c in InvalidFileNameChars)
{
filename = filename.Replace(c, SpaceChar);
}
return filename;
}
/// <summary>
/// Resolves the shortcut.
/// </summary>
/// <param name="filename">The filename.</param>
/// <returns>System.String.</returns>
/// <exception cref="System.ArgumentNullException">filename</exception>
public static string ResolveShortcut(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentNullException("filename");
}
var link = new ShellLink();
((IPersistFile)link).Load(filename, NativeMethods.STGM_READ);
// TODO: if I can get hold of the hwnd call resolve first. This handles moved and renamed files.
// ((IShellLinkW)link).Resolve(hwnd, 0)
var sb = new StringBuilder(NativeMethods.MAX_PATH);
WIN32_FIND_DATA data;
((IShellLinkW)link).GetPath(sb, sb.Capacity, out data, 0);
return sb.ToString();
}
/// <summary>
/// Creates a shortcut file pointing to a specified path
/// </summary>
/// <param name="shortcutPath">The shortcut path.</param>
/// <param name="target">The target.</param>
/// <exception cref="System.ArgumentNullException">shortcutPath</exception>
public static void CreateShortcut(string shortcutPath, string target)
{
if (string.IsNullOrEmpty(shortcutPath))
{
throw new ArgumentNullException("shortcutPath");
}
if (string.IsNullOrEmpty(target))
{
throw new ArgumentNullException("target");
}
var link = new ShellLink();
((IShellLinkW)link).SetPath(target);
((IPersistFile)link).Save(shortcutPath, true);
}
/// <summary>
/// Determines whether the specified filename is shortcut.
/// </summary>
/// <param name="filename">The filename.</param>
/// <returns><c>true</c> if the specified filename is shortcut; otherwise, <c>false</c>.</returns>
/// <exception cref="System.ArgumentNullException">filename</exception>
public static bool IsShortcut(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentNullException("filename");
}
return string.Equals(Path.GetExtension(filename), ".lnk", StringComparison.OrdinalIgnoreCase);
}
/// <summary>
/// Copies all.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="target">The target.</param>
/// <exception cref="System.ArgumentNullException">source</exception>
/// <exception cref="System.ArgumentException">The source and target directories are the same</exception>
public static void CopyAll(string source, string target)
{
if (string.IsNullOrEmpty(source))
{
throw new ArgumentNullException("source");
}
if (string.IsNullOrEmpty(target))
{
throw new ArgumentNullException("target");
}
if (source.Equals(target, StringComparison.OrdinalIgnoreCase))
{
throw new ArgumentException("The source and target directories are the same");
}
// Check if the target directory exists, if not, create it.
if (!Directory.Exists(target))
{
Directory.CreateDirectory(target);
}
foreach (var file in Directory.EnumerateFiles(source))
{
File.Copy(file, Path.Combine(target, Path.GetFileName(file)), true);
}
// Copy each subdirectory using recursion.
foreach (var dir in Directory.EnumerateDirectories(source))
{
CopyAll(dir, Path.Combine(target, Path.GetFileName(dir)));
}
}
/// <summary>
/// Parses the ini file.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>NameValueCollection.</returns>
public static NameValueCollection ParseIniFile(string path)
{
var values = new NameValueCollection();
foreach (var line in File.ReadAllLines(path))
{
var data = line.Split('=');
if (data.Length < 2) continue;
var key = data[0];
var value = data.Length == 2 ? data[1] : string.Join(string.Empty, data, 1, data.Length - 1);
values[key] = value;
}
return values;
}
}
}