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// mainscreen fgbg stream :

return FGBGEvents.stream.listen((event) async {
  print(event); // FGBGType.foreground or FGBGType.background
  if (event == FGBGType.foreground) {
    GlobalV.isAppOnForeground = true;
    flutterLocalNotificationsPlugin.cancelAll();
    getJobFromBackground();
    await myGetStateFunc();
  } else if (event == FGBGType.background) {
    GlobalV.isAppOnForeground = false;
  }
});

// main_screen fonksiyon :

void getJobFromBackground() async {
    await WebServices.getBackgroundNotification(false).then((value) async {
      if (value == null) {
        setState(() {});
      } else if (value != null && value is! int) {
        if (myState == null && !isJobAvailable) {
          int expireTime = value['TimeoutTime'];
          int myCurrentNTP =
              (await NTP.now()).toUtc().millisecondsSinceEpoch ~/ 1000;
          timeDiff = expireTime - myCurrentNTP;
          timeDiff--;
          if (timeDiff > 0) {
            jobFromNotification = true;
            timer = Timer.periodic(Duration(seconds: 1), (t) {
              print("Timediff = $timeDiff");
              if (timeDiff == 0) {
                jobFromNotification = false;
                isJobAvailable = false;
                closeJobOffer(false);
                t.cancel();
              }
              if (timeDiff != 0) {
                timeDiff--;
              }
            });
            GlobalV.notificationID = value['NotificationID'];
            GlobalV.jobRequestFromNotif =
                RequestInfo.fromJson((value["data"]["RequestInfo"]));
            await handleJob(value);
          }
        }
      }
    });
  }

// webservices (kendi auth'una çevirip refreshtoken kısımlarını elemeyi unutma) :

static Future saveBackgroundNotification(
      bool isRefreshed,
      timeouttime,
      notificationID,
      myDeviceID,
      RequestInfo requestInfo,
      UserInfo userInfo) async {
    bool isConnected = await connectionCheck();
    if (!isConnected) return null;
    String token =
        (await SharedPreferences.getInstance()).getString("usertoken");
    Response res = await post(
      Uri.http(
          GlobalV.mainURL + ":9880", "/drivers/saveBackgroundNotification"),
      headers: <String, String>{'Authorization': 'Bearer ' + token},
      body: {
        'DeviceID': myDeviceID,
        'TimeoutTime': timeouttime.toString(),
        'NotificationID': notificationID,
        'UserID': requestInfo.userID ?? "",
        'BeginLat':
            requestInfo.beginLat == null ? "" : requestInfo.beginLat.toString(),
        'BeginLng':
            requestInfo.beginLng == null ? "" : requestInfo.beginLng.toString(),
        'EndLat':
            requestInfo.endLat == null ? "" : requestInfo.endLat.toString(),
        'EndLng':
            requestInfo.endLng == null ? "" : requestInfo.endLng.toString(),
        'BeginCity': requestInfo.beginCity ?? "",
        'EndCity': requestInfo.endCity ?? "",
        'RouteIndex': requestInfo.routeIndex == null
            ? ""
            : requestInfo.routeIndex.toString(),
        'PayMethods': requestInfo.payMethods == null
            ? ""
            : requestInfo.payMethods.toString(),
        'CustomerID': userInfo.sId ?? "",
        'Name': userInfo.name ?? "",
        'Surname': userInfo.surname ?? "",
        'Phone': userInfo.phone ?? "",
        'Email': userInfo.email ?? "",
        "SaveTime": userInfo.saveTime ?? "",
        "Password": userInfo.password ?? "",
        "ProfilePicturePath": userInfo.profilePicturePath ?? "",
        "IsVerified": userInfo.isVerified ?? "",
      },
    );

    if (res.body.contains('"Result":false')) {
      print(
          "Background jobrequest postumuz false döndü (eksik/bozuk veri verdik)");
      return 0;
    } else if (res.body.contains('"message":"Unauthorized"')) {
      print("Forward Price => Unauthorized");
      if (!isRefreshed) {
        print("Yeni token alınıyor");
        return await refreshToken().then((value) async {
          if (value == 1) {
            return await saveBackgroundNotification(true, timeouttime,
                notificationID, myDeviceID, requestInfo, userInfo);
          } else {
            print("Token yenilenirken sunucu ile bağlantıda hata");
            return -1;
          }
        });
      } else {
        print("Yeni token alınsa da ilgili işlem gerçekleştirilemedi.");
        return -1;
      }
    } else if (res.body.contains('"Result":true')) {
      print("Background bildirim post edildi");
      return 1;
    } else {
      print("saveBackgroundNotification hata kodu -2");
      return -2;
    }
  }

  static Future getBackgroundNotification(bool isRefreshed) async {
    bool isConnected = await connectionCheck();
    if (!isConnected) return null;

    Response res = await get(
      Uri.http(GlobalV.mainURL + ":9880",
          "/drivers/getBackgroundNotification/" + GlobalV.tabletID),
      headers: <String, String>{
        'Authorization': 'Bearer ' + GlobalV.user.token
      },
    );

    var json = jsonDecode(res.body);

    if (res.body.contains('"Result":null')) {
      print("foreground getBackgroundNotif null");
      return 0;
    } else if (res.body.contains('"message":"Unauthorized"')) {
      print("Son tablet kontrolü => Unauthorized");
      if (!isRefreshed) {
        print("Yeni token alınıyor");
        return await refreshToken().then((value) async {
          if (value == 1) {
            return await getBackgroundNotification(true);
          } else {
            print("Token yenilenirken sunucu ile bağlantıda hata");
            return -1;
          }
        });
      } else {
        print("Yeni token alınsa da ilgili işlem gerçekleştirilemedi.");
        return -1;
      }
    } else if (json["Result"]["TimeoutTime"] != null) {
      return json["Result"];
    } else {
      return -2;
    }
  }
  
  // Ek not :
  
  Future<void> myGetStateFunc() async {
    await WebServices.getStateByDeviceID(false).then((getState) async {
      if (getState == null) {
        setState(() {});
        if (subscription == null) {
          RemoteMessage initialMessage =
              await FirebaseMessaging.instance.getInitialMessage();
          await handleNotification(initialMessage);
          getJobFromBackground(); // şartlara initialmessagelerden sonra hep bunu koy
        }
        .
        .
        .
        .
        .
        bla bla
        .
        .
      }