import 'dart:io';

import 'package:bot_toast/bot_toast.dart';
import 'package:flutter/material.dart';

class ToolFn {
  DateTime? lastPressedAt; //上次点击时间

  // 字符串是否为空
  static bool isBlank(String str) {
    if (str.isEmpty) {
      return true;
    }
    return false;
  }

  ///手机号验证(只验证前三位号段)
  static bool checkMobile(String str) {
    if (isBlank(str)) {
      return true;
    }
    return !RegExp(r"^1(3\d|4[5-9]|5[0-35-9]|6[567]|7[0-8]|8\d|9[0-35-9])\d{8}")
        .hasMatch(str);
  }

  static void tips(String msg) {
    BotToast.showText(
        text: msg,
        contentColor: Colors.black,
        textStyle: const TextStyle(fontSize: 17, color: Colors.white));
  }

  // 监听返回键
  void isExit() {
    if (lastPressedAt == null ||
        DateTime.now().difference(lastPressedAt!) >
            const Duration(seconds: 1)) {
      //两次点击间隔超过1秒则重新计时
      lastPressedAt = DateTime.now();
      ToolFn.tips("再按一次退出程序");
      return;
    }
    exit(0);
  }
}