flutter_server_box/lib/view/page/ping.dart

import 'package:flutter/material.dart';
import 'package:toolbox/core/extension/uint8list.dart';
import 'package:toolbox/core/utils.dart';
import 'package:toolbox/data/model/server/ping_result.dart';
import 'package:toolbox/data/provider/server.dart';
import 'package:toolbox/data/res/color.dart';
import 'package:toolbox/generated/l10n.dart';
import 'package:toolbox/locator.dart';
import 'package:toolbox/view/widget/input_field.dart';
import 'package:toolbox/view/widget/round_rect_card.dart';

final doaminReg =
    RegExp(r'^[a-zA-Z0-9][a-zA-Z0-9-]{1,61}[a-zA-Z0-9]\.[a-zA-Z]{2,}$');
final ipv4Reg =
    RegExp(r'^((25[0-5]|(2[0-4]|1[0-9]|[1-9]|)[0-9])(\.(?!$)|$)){4}$');
final ipv6Reg = RegExp(r'^([0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$');

class PingPage extends StatefulWidget {
  const PingPage({Key? key}) : super(key: key);

  @override
  _PingPageState createState() => _PingPageState();
}

class _PingPageState extends State<PingPage>
    with AutomaticKeepAliveClientMixin {
  late TextEditingController _textEditingController;
  late MediaQueryData _media;
  final List<PingResult> _results = [];
  final _serverProvider = locator<ServerProvider>();
  late S s;
  static const summaryTextStyle = TextStyle(
    fontSize: 12,
  );

  @override
  void initState() {
    super.initState();
    _textEditingController = TextEditingController(text: '');
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    _media = MediaQuery.of(context);
    s = S.of(context);
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Scaffold(
      body: SingleChildScrollView(
          padding: const EdgeInsets.symmetric(horizontal: 7),
          child: Column(children: [
            const SizedBox(height: 13),
            buildInput(context, _textEditingController,
                hint: s.inputDomainHere,
                maxLines: 1,
                onSubmitted: (_) => doPing()),
            SizedBox(
              width: double.infinity,
              height: _media.size.height * 0.6,
              child: ListView.builder(
                  controller: ScrollController(),
                  itemCount: _results.length,
                  itemBuilder: (context, index) {
                    final result = _results[index];
                    return _buildResultItem(result);
                  }),
            ),
          ])),
      floatingActionButton: FloatingActionButton(
        heroTag: 'ping fab',
        onPressed: () {
          try {
            doPing();
          } catch (e) {
            showSnackBar(context, Text('Error: \n$e'));
          }
        },
        child: const Icon(Icons.play_arrow),
      ),
    );
  }

  Widget _buildResultItem(PingResult result) {
    final unknown = s.unknown;
    final ms = s.ms;
    return RoundRectCard(ListTile(
      contentPadding: const EdgeInsets.symmetric(vertical: 7, horizontal: 17),
      title: Text(result.serverName,
          style: TextStyle(
              fontSize: 18, fontWeight: FontWeight.bold, color: primaryColor)),
      subtitle: Text(
        _buildPingSummary(result, unknown, ms),
        style: summaryTextStyle,
      ),
      trailing: Text(
          '${s.pingAvg}${result.statistic?.avg?.toStringAsFixed(2) ?? s.unknown} $ms',
          style: TextStyle(fontSize: 14, color: primaryColor)),
    ));
  }

  String _buildPingSummary(PingResult result, String unknown, String ms) {
    final ip = result.ip ?? unknown;
    if (result.results == null || result.results!.isEmpty) {
      return '$ip - ${s.noResult}';
    }
    final ttl = result.results?.first.ttl ?? unknown;
    final loss = result.statistic?.loss ?? unknown;
    final min = result.statistic?.min ?? unknown;
    final max = result.statistic?.max ?? unknown;
    return '$ip\n${s.ttl}: $ttl, ${s.loss}: $loss%\n${s.min}: $min $ms, ${s.max}: $max $ms';
  }

  Future<void> doPing() async {
    FocusScope.of(context).requestFocus(FocusNode());
    _results.clear();
    final target = _textEditingController.text.trim();
    if (target.isEmpty) {
      showSnackBar(context, Text(s.pingInputIP));
      return;
    }

    if (_serverProvider.servers.isEmpty) {
      showSnackBar(context, Text(s.pingNoServer));
      return;
    }

    if (!doaminReg.hasMatch(target) &&
        !ipv4Reg.hasMatch(target) &&
        !ipv6Reg.hasMatch(target)) {
      showSnackBar(context, Text(s.pingInputIP));
      return;
    }

    try {
      await Future.wait(_serverProvider.servers.map((e) async {
        if (e.client == null) {
          return;
        }
        final result = await e.client!.run('ping -c 3 $target').string;
        _results.add(PingResult.parse(e.info.name, result));
        setState(() {});
      }));
    } catch (e) {
      showSnackBar(context, Text(e.toString()));
    }
  }

  @override
  bool get wantKeepAlive => true;
}