Automatic naming for creating new folder

Examples/FileBrowser/FileBrowser (macOS)/DirectoryStructure.swift

@@ -142,6 +142,10 @@ class DirectoryStructure {
     viewTree.nodes.count
   }
 
+  func rootNodes() -> [FileNode] {
+    viewTree.rootNodes()
+  }
+
   func parent(of node: FileNode) -> FileNode? {
     viewTree.parent(of: node)
   }

Examples/FileBrowser/FileBrowser (macOS)/FilesViewController.swift

@@ -192,15 +192,29 @@ class FilesViewController: NSViewController {
     }
   }
 
-  func createDirectory(in parent: String? = nil) {
-    Task {
-      let name = NSLocalizedString("untitled folder", comment: "")
-      if let parent {
-        await dirTree.reload(directory: parent, outlineView)
+  func createNewFolder() {
+    let filenames = dirTree
+      .rootNodes()
+      .map { $0.name }
+
+    let filename = {
+      let baseName = NSLocalizedString("untitled folder", comment: "")
+      if !filenames.contains(baseName) {
+        return baseName
       } else {
-        try await client.createDirectory(path: join(path, name))
-        await dirTree.reload(directory: path, outlineView)
+        var i = 2
+        while true {
+          let name = "\(baseName) \(i)"
+          if !filenames.contains(name) {
+            return name
+          }
+          i += 1
+        }
       }
+    }()
+    Task {
+      try await client.createDirectory(path: join(path, filename))
+      await dirTree.reload(directory: path, outlineView)
     }
   }
 
@@ -616,8 +630,6 @@ extension FilesViewController: NSMenuItemValidation {
     let targetRows = outlineView.targetRows()
 
     switch menuItem.action {
-    case Selector({ "newFolderAction(_:)" }()):
-      return true
     case #selector(openMenuAction(_:)):
       guard selectedRows.count == 1 else { return false }
       guard let selectedRow = selectedRows.first else { return false }

Examples/FileBrowser/FileBrowser (macOS)/WindowController.swift

@@ -179,7 +179,7 @@ class WindowController: NSWindowController {
     guard let navigationController = navigationController() else { return }
     guard let filesViewController = navigationController.topViewController as? FilesViewController else { return }
 
-    filesViewController.createDirectory()
+    filesViewController.createNewFolder()
   }
 
   @objc

Examples/FileBrowser/FileBrowser.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -16,7 +16,7 @@
       "location" : "https://github.com/kishikawakatsumi/SMBClient.git",
       "state" : {
         "branch" : "main",
-        "revision" : "5a3ce1eafede6ab8cd98ad7fde01a571ccf81bce"
+        "revision" : "1a2683c12ff2a050f500db293ce0378bdb056411"
       }
     }
   ],