TF-56 Implement upload single attachment

lib/features/composer/presentation/widgets/top_bar_composer_widget_builder.dart

@@ -5,10 +5,12 @@ import 'package:flutter/widgets.dart';
 
 typedef OnBackActionClick = void Function();
 typedef OnSendEmailActionClick = void Function();
+typedef OnAttachFileActionClick = void Function();
 
 class TopBarComposerWidgetBuilder {
   OnBackActionClick? _onBackActionClick;
   OnSendEmailActionClick? _onSendEmailActionClick;
+  OnAttachFileActionClick? _onAttachFileActionClick;
 
   final ImagePaths _imagePaths;
   final bool _isEnableEmailSendButton;
@@ -23,6 +25,10 @@ class TopBarComposerWidgetBuilder {
     _onSendEmailActionClick = onSendEmailActionClick;
   }
 
+  void addAttachFileActionClick(OnAttachFileActionClick onAttachFileActionClick) {
+    _onAttachFileActionClick = onAttachFileActionClick;
+  }
+
   Widget build() {
     return Container(
       key: Key('top_bar_composer_widget'),
@@ -64,7 +70,13 @@ class TopBarComposerWidgetBuilder {
       children: [
         ButtonBuilder(_imagePaths.icComposerFileShare).key(Key('button_file_share')).build(),
         SizedBox(width: 2),
-        ButtonBuilder(_imagePaths.icShare).key(Key('button_attachment')).build(),
+        ButtonBuilder(_imagePaths.icShare)
+          .key(Key('button_attachment'))
+          .onPressActionClick(() {
+            if (_onAttachFileActionClick != null) {
+              _onAttachFileActionClick!();
+            }})
+          .build(),
         SizedBox(width: 2),
         ButtonBuilder(_imagePaths.icComposerSend)
           .key(Key('button_send_email'))