Add getDirectoryPaths macOS implementation

Author: adpinola

packages/file_selector/file_selector_macos/example/pubspec.yaml

@@ -15,9 +15,7 @@ dependencies:
     # The example app is bundled with the plugin so we use a path dependency on
     # the parent directory to use the current plugin's version.
     path: ..
-  # TODO(VanesaOshiro): This should be 2.3.0 once it is published.
-  file_selector_platform_interface:
-    path: ../../file_selector_platform_interface/
+  file_selector_platform_interface: ^2.4.0
   flutter:
     sdk: flutter
 

packages/file_selector/file_selector_macos/lib/file_selector_macos.dart

@@ -79,13 +79,14 @@ class FileSelectorMacOS extends FileSelectorPlatform {
     String? initialDirectory,
     String? confirmButtonText,
   }) async {
-    return _channel.invokeMethod<String>(
+    final List<String>? pathList = await _channel.invokeListMethod<String>(
       'getDirectoryPath',
       <String, dynamic>{
         'initialDirectory': initialDirectory,
         'confirmButtonText': confirmButtonText,
       },
     );
+    return pathList?.first;
   }
 
   @override

packages/file_selector/file_selector_macos/macos/Classes/FileSelectorPlugin.swift

@@ -73,11 +73,7 @@ public class FileSelectorPlugin: NSObject, FlutterPlugin {
       configure(panel: panel, with: arguments)
       configure(openPanel: panel, with: arguments, choosingDirectory: choosingDirectory)
       panelController.display(panel, for: viewProvider.view?.window) { (selection: [URL]?) in
-        if (choosingDirectory && panel.allowsMultipleSelection == false) {
-          result(selection?.first?.path)
-        } else {
           result(selection?.map({ item in item.path }))
-        }
       }
     case saveMethod:
       let panel = NSSavePanel()

packages/file_selector/file_selector_macos/pubspec.yaml

@@ -18,9 +18,7 @@ flutter:
 
 dependencies:
   cross_file: ^0.3.1
-   # TODO(VanesaOshiro): This should be 2.3.0 once it is published.
-  file_selector_platform_interface:
-    path: ../file_selector_platform_interface
+  file_selector_platform_interface: ^2.4.0
   flutter:
     sdk: flutter
 

packages/file_selector/file_selector_platform_interface/lib/src/method_channel/method_channel_file_selector.dart

@@ -81,14 +81,13 @@ class MethodChannelFileSelector extends FileSelectorPlatform {
     String? initialDirectory,
     String? confirmButtonText,
   }) async {
-    final List<String>? pathList = await _channel.invokeListMethod<String>(
+    return _channel.invokeMethod<String>(
       'getDirectoryPath',
       <String, dynamic>{
         'initialDirectory': initialDirectory,
         'confirmButtonText': confirmButtonText,
       },
     );
-    return pathList?.first;
   }
 
   @override