check null safety

lib/data/services/auth_imp.dart

@@ -3,17 +3,16 @@ import 'package:fcs/domain/entities/auth_result.dart';
 import 'package:fcs/domain/entities/connectivity.dart';
 import 'package:fcs/domain/entities/setting.dart';
 import 'package:fcs/domain/entities/user.dart';
-import 'package:flutter/material.dart';
 
 import 'auth_service.dart';
 
 class AuthServiceImp implements AuthService {
   AuthServiceImp({
-    @required this.authFb,
-    @required this.connectivity,
+    required this.authFb,
+    required this.connectivity,
   });
 
-  final Connectivity connectivity;
+  final Connectivity? connectivity;
   final AuthFb authFb;
 
   @override
@@ -32,7 +31,7 @@ class AuthServiceImp implements AuthService {
   }
 
   @override
-  Stream<User> getUserStream() {
+  Stream<User?> getUserStream() {
     return authFb.user();
   }
 

lib/data/services/auth_service.dart

@@ -11,6 +11,6 @@ abstract class AuthService {
   Future<void> updateProfileName(String newUserName);
   Future<void> updatePreferredCurrency(String currency);
   Future<bool> hasInvite();
-  Stream<User> getUserStream();
+  Stream<User?> getUserStream();
   Stream<Setting> getSetting();
 }

lib/data/services/carton_imp.dart

@@ -1,17 +1,16 @@
 import 'package:fcs/data/provider/carton_data_provider.dart';
 import 'package:fcs/domain/entities/carton.dart';
 import 'package:fcs/domain/entities/connectivity.dart';
-import 'package:flutter/material.dart';
 
 import 'carton_service.dart';
 
 class CartonServiceImp implements CartonService {
   CartonServiceImp({
-    @required this.cartonDataProvider,
-    @required this.connectivity,
+    required this.cartonDataProvider,
+    required this.connectivity,
   });
 
-  final Connectivity connectivity;
+  final Connectivity? connectivity;
   final CartonDataProvider cartonDataProvider;
 
   @override

lib/data/services/common_imp.dart

@@ -2,13 +2,12 @@ import 'package:fcs/data/provider/common_data_provider.dart';
 import 'package:fcs/domain/entities/discount.dart';
 import 'package:fcs/domain/entities/payment_method.dart';
 import 'package:fcs/domain/vo/message.dart';
-import 'package:flutter/material.dart';
 
 import 'common_service.dart';
 
 class CommonServiceImp implements CommonService {
   CommonServiceImp({
-    @required this.commonDataProvider,
+    required this.commonDataProvider,
   });
 
   final CommonDataProvider commonDataProvider;

lib/data/services/delivery_address_imp.dart

@@ -1,17 +1,16 @@
 import 'package:fcs/data/provider/delivery_address_data_provider.dart';
 import 'package:fcs/domain/entities/connectivity.dart';
 import 'package:fcs/domain/vo/delivery_address.dart';
-import 'package:flutter/material.dart';
 
 import 'delivery_address_service.dart';
 
 class DeliveryAddressImp implements DeliveryAddressService {
   DeliveryAddressImp({
-    @required this.connectivity,
-    @required this.deliveryAddressDataProvider,
+    required this.connectivity,
+    required this.deliveryAddressDataProvider,
   });
 
-  final Connectivity connectivity;
+  final Connectivity? connectivity;
   final DeliveryAddressDataProvider deliveryAddressDataProvider;
 
   @override

lib/data/services/fcs_shipment_imp.dart

@@ -1,17 +1,16 @@
 import 'package:fcs/data/provider/fcs_shipment_data_provider.dart';
 import 'package:fcs/domain/entities/connectivity.dart';
 import 'package:fcs/domain/entities/fcs_shipment.dart';
-import 'package:flutter/material.dart';
 
 import 'fcs_shipment_service.dart';
 
 class FcsShipmentServiceImp implements FcsShipmentService {
   FcsShipmentServiceImp({
-    @required this.connectivity,
-    @required this.shipmentDataProvider,
+    required this.connectivity,
+    required this.shipmentDataProvider,
   });
 
-  final Connectivity connectivity;
+  final Connectivity? connectivity;
   final FcsShipmentDataProvider shipmentDataProvider;
 
   @override

lib/data/services/invoice_imp.dart

@@ -1,21 +1,17 @@
 import 'package:fcs/data/provider/invoice_data_provider.dart';
-import 'package:fcs/data/provider/shipment_data_provider.dart';
-import 'package:fcs/data/services/shipment_service.dart';
 import 'package:fcs/domain/entities/connectivity.dart';
 import 'package:fcs/domain/entities/invoice.dart';
 import 'package:fcs/domain/entities/payment.dart';
-import 'package:fcs/domain/entities/shipment.dart';
-import 'package:flutter/material.dart';
 
 import 'invoice_service.dart';
 
 class InvoiceServiceImp implements InvoiceService {
   InvoiceServiceImp({
-    @required this.invoiceDataProvider,
-    @required this.connectivity,
+    required this.invoiceDataProvider,
+    required this.connectivity,
   });
 
-  final Connectivity connectivity;
+  final Connectivity? connectivity;
   final InvoiceDataProvider invoiceDataProvider;
 
   @override

lib/data/services/package_imp.dart

@@ -1,17 +1,16 @@
 import 'package:fcs/data/provider/package_data_provider.dart';
 import 'package:fcs/domain/entities/connectivity.dart';
 import 'package:fcs/domain/entities/package.dart';
-import 'package:flutter/material.dart';
 
 import 'package_service.dart';
 
 class PackageServiceImp implements PackageService {
   PackageServiceImp({
-    @required this.connectivity,
-    @required this.packageDataProvider,
+    required this.connectivity,
+    required this.packageDataProvider,
   });
 
-  final Connectivity connectivity;
+  final Connectivity? connectivity;
   final PackageDataProvider packageDataProvider;
 
   @override
@@ -30,7 +29,7 @@ class PackageServiceImp implements PackageService {
   }
 
   @override
-  Future<List<Package>> ftsSearchPackage(String term) {
+  Future<List<Package>?> ftsSearchPackage(String term) {
     return packageDataProvider.ftsSearchPackage(term);
   }
 

lib/data/services/package_service.dart

@@ -7,7 +7,7 @@ abstract class PackageService {
   Future<void> deleteReceiving(Package package);
   Future<void> updateProcessing(Package package);
   Future<void> deleteProcessing(Package package);
-  Future<List<Package>> ftsSearchPackage(String term);
+  Future<List<Package>?> ftsSearchPackage(String term);
   Future<List<Package>> searchPackage(String term);
   Future<void> changeDeliveryAddress(String packageID, String deliveryID);
   Future<void> packageReturn(String packageID);

lib/data/services/rate_imp.dart

@@ -4,17 +4,16 @@ import 'package:fcs/domain/entities/connectivity.dart';
 import 'package:fcs/domain/entities/discount_by_weight.dart';
 import 'package:fcs/domain/entities/custom_duty.dart';
 import 'package:fcs/domain/entities/rate.dart';
-import 'package:flutter/material.dart';
 
 import 'rate_service.dart';
 
 class RateServiceImp implements RateService {
   RateServiceImp({
-    @required this.rateDataProvider,
-    @required this.connectivity,
+    required this.rateDataProvider,
+    required this.connectivity,
   });
 
-  final Connectivity connectivity;
+  final Connectivity? connectivity;
   final RateDataProvider rateDataProvider;
 
   @override

lib/data/services/services.dart

@@ -35,17 +35,18 @@ import 'user_service.dart';
 class Services {
   static final Services instance = Services._();
 
-  AuthService _authService;
-  UserService _userService;
-  PackageService _packageService;
-  MessagingService _messagingService;
-  CommonService _commonService;
-  FcsShipmentService _fcsShipmentService;
-  DeliveryAddressService _deliveryAddressService;
-  RateService _rateService;
-  ShipmentService _shipmentService;
-  CartonService _cartonService;
-  InvoiceService _invoiceService;
+  late AuthService _authService;
+  late UserService _userService;
+  late PackageService _packageService;
+  late MessagingService _messagingService;
+  late CommonService _commonService;
+  late FcsShipmentService _fcsShipmentService;
+  late DeliveryAddressService _deliveryAddressService;
+  late RateService _rateService;
+  late ShipmentService _shipmentService;
+  late CartonService _cartonService;
+  late InvoiceService _invoiceService;
+
   Services._() {
     _authService = AuthServiceImp(
       authFb: AuthFb.instance,

lib/data/services/shipment_imp.dart

@@ -2,15 +2,14 @@ import 'package:fcs/data/provider/shipment_data_provider.dart';
 import 'package:fcs/data/services/shipment_service.dart';
 import 'package:fcs/domain/entities/connectivity.dart';
 import 'package:fcs/domain/entities/shipment.dart';
-import 'package:flutter/material.dart';
 
 class ShipmentServiceImp implements ShipmentService {
   ShipmentServiceImp({
-    @required this.shipmentDataProvider,
-    @required this.connectivity,
+    required this.shipmentDataProvider,
+    required this.connectivity,
   });
 
-  final Connectivity connectivity;
+  final Connectivity? connectivity;
   final ShipmentDataProvider shipmentDataProvider;
 
   @override

lib/data/services/user_imp.dart

@@ -1,17 +1,16 @@
 import 'package:fcs/data/provider/user_data_provider.dart';
 import 'package:fcs/domain/entities/connectivity.dart';
 import 'package:fcs/domain/entities/user.dart';
-import 'package:flutter/material.dart';
 
 import 'user_service.dart';
 
 class UserServiceImp implements UserService {
   UserServiceImp({
-    @required this.connectivity,
-    @required this.userDataProvider,
+    required this.connectivity,
+    required this.userDataProvider,
   });
 
-  final Connectivity connectivity;
+  final Connectivity? connectivity;
   final UserDataProvider userDataProvider;
 
   @override
@@ -30,7 +29,7 @@ class UserServiceImp implements UserService {
   }
 
   @override
-  Future<User> findUser(String phoneNumber) {
+  Future<User?> findUser(String phoneNumber) {
     return userDataProvider.findUser(phoneNumber);
   }
 

lib/data/services/user_service.dart

@@ -4,7 +4,7 @@ abstract class UserService {
   Future<void> inviteUser(String userName, String phoneNumber);
   Future<void> deleteInvite(String phoneNumber);
   Future<void> acceptRequest(String userID);
-  Future<User> findUser(String phoneNumber);
+  Future<User?> findUser(String phoneNumber);
   Future<List<User>> searchUser(String term);
   Future<void> uploadMsgToken(String token);
   Future<void> removeMsgToken(String token);