Combine navigation on error with FutureBuilder

fancy_future_builder.dart

import 'package:flutter/material.dart';

class FancyFutureBuilder<T> extends StatelessWidget {
  final Future<T> future;
  final Widget Function (BuildContext , AsyncSnapshot<T>) builder;

  final Function doNavigation;
  final bool Function(Object) shouldNavigate;

  FancyFutureBuilder({
    @required this.future,
    @required this.builder,
    @required this.doNavigation,
    @required this.shouldNavigate
  });

  @override
  Widget build(BuildContext context) => FutureBuilder<T>(
    future: future.catchError(doNavigation, test: shouldNavigate),
    builder: builder
  );
}