polaris/ui/lib/widgets/utils.dart

import 'dart:math';

import 'package:flutter/material.dart';
import 'package:flutter_adaptive_scaffold/flutter_adaptive_scaffold.dart';
import 'package:intl/intl.dart';
import 'package:ui/providers/APIs.dart';
import 'dart:io' show Platform;

class Utils {
  static Future<void> showAlertDialog(BuildContext context, String msg) async {
    return showDialog<void>(
      context: context,
      barrierDismissible: true, // user must tap button!
      builder: (BuildContext context) {
        return AlertDialog(
          title: const Text('警告 ⚠️'),
          content: SingleChildScrollView(
            child: ListBody(
              children: <Widget>[
                Text(msg),
              ],
            ),
          ),
          actions: <Widget>[
            TextButton(
              child: const Text('确定'),
              onPressed: () {
                Navigator.of(context).pop();
              },
            ),
          ],
        );
      },
    );
  }
}

showSnakeBar(String msg) {
  final context = APIs.navigatorKey.currentContext;
  if (context != null) {
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
      content: Text(msg),
      showCloseIcon: true,
    ));
  }
}

extension FileFormatter on num {
  String readableFileSize({bool base1024 = false}) {
    final base = base1024 ? 1024 : 1000;
    if (this <= 0) return "0";
    final units = ["B", "kB", "MB", "GB", "TB"];
    int digitGroups = (log(this) / log(base)).floor();
    return "${NumberFormat("#,##0.#").format(this / pow(base, digitGroups))} ${units[digitGroups]}";
  }
}

  bool isSmallScreen(BuildContext context) {
    final screenWidth = MediaQuery.of(context).size.width;
    return screenWidth < Breakpoints.small.endWidth!.toDouble();
  }