allExceptExtensions is added on get files.

ActiveDirectoryFileManagement.nuspec

@@ -3,7 +3,7 @@
  <metadata>
  <id>ActiveDirectoryFileManagement</id>
  <title>Active Directory File Management</title>
- <version>1.0.2</version>
+ <version>1.0.3</version>
  <authors>ShadyNagy</authors>
  <description>
  Active Directory File Management Package

src/ActiveDirectoryFileManagement/Interfaces/IDirectoryService.cs

@@ -66,16 +66,18 @@ public interface IDirectoryService
  /// </summary>
  /// <param name="path">The directory path to search.</param>
  /// <param name="extensions">An array of file extensions to filter the files. If null or empty, all files are returned.</param>
+ /// <param name="allExceptExtensions">If true then get all files but not these extensions and if false then get only files with these extensions.</param>
  /// <returns>An enumerable collection of file paths.</returns>
- IEnumerable<string> GetFilesUnderUser(string path, string[] extensions);
+ IEnumerable<string> GetFilesUnderUser(string path, string[] extensions, bool allExceptExtensions = false);
 
  /// <summary>
  /// Retrieves the files from the specified path.
  /// </summary>
  /// <param name="path">The directory path to search.</param>
  /// <param name="extensions">An array of file extensions to filter the files. If null or empty, all files are returned.</param>
+ /// <param name="allExceptExtensions">If true then get all files but not these extensions and if false then get only files with these extensions.</param>
  /// <returns>An enumerable collection of file paths.</returns>
- IEnumerable<string> GetFiles(string path, string[] extensions);
+ IEnumerable<string> GetFiles(string path, string[] extensions, bool allExceptExtensions = false);
 
  /// <summary>
  /// Retrieves the directories from the specified path under the context of an Active Directory user.

src/ActiveDirectoryFileManagement/Services/DirectoryService.cs

@@ -107,21 +107,23 @@ public IEnumerable<string> GetFiles(string path)
  /// </summary>
  /// <param name="path">The directory path to search.</param>
  /// <param name="extensions">An array of file extensions to filter the files. If null or empty, all files are returned.</param>
+ /// <param name="allExceptExtensions">If true then get all files but not these extensions and if false then get only files with these extensions.</param>
  /// <returns>An enumerable collection of file paths.</returns>
- public IEnumerable<string> GetFilesUnderUser(string path, string[] extensions)
+ public IEnumerable<string> GetFilesUnderUser(string path, string[] extensions, bool allExceptExtensions = false)
  {
- return _activeDirectoryService.ImpersonateUserAndRunAction(() => GetFilesByExtensions(path, extensions));
+ return _activeDirectoryService.ImpersonateUserAndRunAction(() => allExceptExtensions? GetFilesByNotExtensions(path, extensions) : GetFilesByExtensions(path, extensions));
  }
 
  /// <summary>
  /// Retrieves the files from the specified path.
  /// </summary>
  /// <param name="path">The directory path to search.</param>
  /// <param name="extensions">An array of file extensions to filter the files. If null or empty, all files are returned.</param>
+ /// <param name="allExceptExtensions">If true then get all files but not these extensions and if false then get only files with these extensions.</param>
  /// <returns>An enumerable collection of file paths.</returns>
- public IEnumerable<string> GetFiles(string path, string[] extensions)
+ public IEnumerable<string> GetFiles(string path, string[] extensions, bool allExceptExtensions = false)
  {
- return GetFilesByExtensions(path, extensions);
+ return allExceptExtensions? GetFilesByNotExtensions(path, extensions) : GetFilesByExtensions(path, extensions);
  }
 
  /// <summary>
@@ -150,4 +152,11 @@ private IEnumerable<string> GetFilesByExtensions(string path, string[] extension
  return Directory.EnumerateFiles(path)
  .Where(file => extensionSet.Contains(Path.GetExtension(file)));
  }
+
+ private IEnumerable<string> GetFilesByNotExtensions(string path, string[] extensions)
+ {
+ var extensionSet = new HashSet<string>(extensions.Select(ext => "." + ext), StringComparer.OrdinalIgnoreCase);
+ return Directory.EnumerateFiles(path)
+ .Where(file => !extensionSet.Contains(Path.GetExtension(file)));
+ }
 }