Flutter common actions: prompt, confirm, alert, toast, navigate

actions.dart

import 'package:flutter/material.dart';

Future<String?> prompt(BuildContext context, {String? value, String title = 'Edit Text'}) async {
  final controller = TextEditingController(text: value);
  final theme = Theme.of(context);
  final colors = theme.colorScheme;
  final saved = await showDialog<bool>(
    context: context,
    builder:
        (context) => AlertDialog(
          backgroundColor: colors.surface,
          contentTextStyle: TextStyle(color: colors.onSurface),
          title: Text(title),
          content: StatefulBuilder(
            builder: (context, setState) {
              return TextField(
                autofocus: true,
                controller: controller,
                onEditingComplete: () => Navigator.of(context).pop(true),
              );
            },
          ),
          actions: [
            TextButton(child: const Text('Cancel'), onPressed: () => Navigator.of(context).pop(false)),
            TextButton(child: const Text('Save'), onPressed: () => Navigator.of(context).pop(true)),
          ],
        ),
  );
  return saved == true ? controller.text : null;
}

Future<bool> confirm(BuildContext context, {String title = 'Confirm', String? content}) async {
  final result = await showDialog<bool>(
    context: context,
    builder:
        (context) => AlertDialog(
          title: Text(title),
          content: content != null ? Text(content) : null,
          actions: [
            TextButton(child: const Text('Cancel'), onPressed: () => Navigator.of(context).pop(false)),
            TextButton(child: const Text('Confirm'), onPressed: () => Navigator.of(context).pop(true)),
          ],
        ),
  );
  return result ?? false;
}

Future<void> alert(BuildContext context, {String title = 'Alert', String? content}) async {
  await showDialog<void>(
    context: context,
    builder:
        (context) => AlertDialog(
          title: Text(title),
          content: content != null ? Text(content) : null,
          actions: [TextButton(child: const Text('OK'), onPressed: () => Navigator.of(context).pop())],
        ),
  );
}

void toast(BuildContext context, String message) {
  final messenger = ScaffoldMessenger.of(context);
  messenger.hideCurrentSnackBar();
  messenger.showSnackBar(SnackBar(content: Text(message)));
}

Future<T?> navigate<T>(
  BuildContext context,
  Widget target, {
  bool fullScreenDialog = false,
  bool rootNavigator = false,
}) async {
  final nav = Navigator.of(context, rootNavigator: rootNavigator);
  return nav.push<T>(MaterialPageRoute(builder: (context) => target, fullscreenDialog: fullScreenDialog));
}