75 lines
2.1 KiB
Dart
75 lines
2.1 KiB
Dart
import 'dart:async';
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import 'package:connectivity_plus/connectivity_plus.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:fl_query_connectivity_plus_adapter/lookups/connection_lookup_io.dart'
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if (dart.library.html) 'package:fl_query_connectivity_plus_adapter/lookups/connection_lookup_web.dart';
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abstract class ConnectionLookup {
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Future<bool> doesConnectTo(String address);
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Future<bool> isVpnActive();
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}
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class InternetConnectivityChecker
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with WidgetsBindingObserver, ConnectionLookupMixin {
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final StreamController<bool> controller;
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bool _wasConnected = true;
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bool get isAppPaused =>
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WidgetsBinding.instance.lifecycleState == AppLifecycleState.paused;
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InternetConnectivityChecker(Duration duration)
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: controller = StreamController<bool>.broadcast() {
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Timer.periodic(duration, (timer) async {
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if (isAppPaused) {
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return;
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}
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await hasConnection();
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});
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Connectivity().onConnectivityChanged.listen((event) async {
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if (isAppPaused) {
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return;
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}
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await hasConnection();
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});
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}
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@override
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didChangeAppLifecycleState(AppLifecycleState state) async {
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if (state == AppLifecycleState.resumed) {
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await hasConnection();
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}
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}
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Future<bool> hasConnection() async {
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final connectivityResult = await (Connectivity().checkConnectivity());
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final hasNetwork = [
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ConnectivityResult.mobile,
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ConnectivityResult.wifi,
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ConnectivityResult.ethernet,
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].contains(connectivityResult);
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final isVpn =
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connectivityResult == ConnectivityResult.vpn || await isVpnActive();
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final connected = hasNetwork
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? kIsWeb
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? await doesConnectTo('/favicon.ico') ||
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await doesConnectTo('/favicon.png') ||
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await doesConnectTo('/favicon.gif')
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: await doesConnectTo('google.com') ||
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await doesConnectTo('www.baidu.com')
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: isVpn;
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if (connected != _wasConnected) {
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_wasConnected = connected;
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controller.add(connected);
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}
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return connected;
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}
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Stream<bool> get onConnectionChanged => controller.stream;
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}
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