app_computo_lite/lib/viewmodels/helpers_view_model.dart

import 'package:flutter/material.dart';

class HelpersViewModel {
  static Future<void> dialog(
      int buttons, 
      Widget widget,
      String content, 
      BuildContext context, 
      String textBtn1,
      String textBtn2,
      Function callback, 
      Function callback2
    ) async {
    return showDialog<void>(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: widget,
          content: Text(content),
          actions: <Widget>[
            TextButton(
              child: Text(textBtn1, style: TextStyle(color: Colors.black)),
              onPressed: () {
                Navigator.of(context).pop();
                callback();
              },
            ),
            if(buttons == 2) 
              TextButton(
                child: Text(textBtn2, style: TextStyle(color: Colors.black)),
                onPressed: () {
                  Navigator.of(context).pop();
                  callback2();
                },
              ),
          ],
        );
      },
    );
  }
}