Initial commit

lib/core/service/connectivity_status.service.dart

@@ -0,0 +1,51 @@
+import 'dart:io';
+
+import 'package:connectivity_plus/connectivity_plus.dart';
+import 'package:injectable/injectable.dart';
+
+abstract class ConnectivityStatusService {
+  Future<bool> isConnectedToInternet();
+  Future<bool> isServerReachable(String serverAddress);
+  Stream<bool> connectivityChanges();
+}
+
+@Injectable(as: ConnectivityStatusService)
+class ConnectivityStatusServiceImpl implements ConnectivityStatusService {
+  final Connectivity connectivity;
+
+  ConnectivityStatusServiceImpl(this.connectivity);
+
+  @override
+  Stream<bool> connectivityChanges() {
+    return connectivity.onConnectivityChanged
+        .map(_hasActiveInternetConnection)
+        .asBroadcastStream();
+  }
+
+  @override
+  Future<bool> isConnectedToInternet() async {
+    return _hasActiveInternetConnection(
+        await (Connectivity().checkConnectivity()));
+  }
+
+  @override
+  Future<bool> isServerReachable(String serverAddress) async {
+    try {
+      final result = await InternetAddress.lookup(
+          serverAddress.replaceAll(RegExp(r"https?://"), ""));
+      if (result.isNotEmpty && result.first.rawAddress.isNotEmpty) {
+        return true;
+      } else {
+        return false;
+      }
+    } on SocketException catch (_) {
+      return false;
+    }
+  }
+
+  bool _hasActiveInternetConnection(ConnectivityResult conn) {
+    return conn == ConnectivityResult.mobile ||
+        conn == ConnectivityResult.wifi ||
+        conn == ConnectivityResult.ethernet;
+  }
+}