Merge remote-tracking branch 'upstream/master'

lib/domain/entities/setting.dart

@@ -9,7 +9,7 @@ List<Day> dayLists = [
 ];
 
 class Setting {
-  final int? supportBuildNum;
+  final int supportBuildNum;
   // contact page
   String? usaAddress;
   String? mmAddress;
@@ -27,7 +27,7 @@ class Setting {
   List<String> shipmentTypes;
 
   Setting(
-      {this.supportBuildNum,
+      {this.supportBuildNum = 1,
       this.usaAddress,
       this.mmAddress,
       this.usaContactNumber,

lib/domain/entities/user.dart

@@ -16,8 +16,8 @@ class User {
   String? fcsID;
   DateTime? lastMessageTime;
   String? lastMessage;
-  int? userUnseenCount;
+  int userUnseenCount;
-  int? fcsUnseenCount;
+  int fcsUnseenCount;
   String? preferCurrency;
 
   String get initial =>
@@ -42,12 +42,12 @@ class User {
   }
 
   String get getUserUnseenCount => userUnseenCount != null
-      ? userUnseenCount! > 100
+      ? userUnseenCount > 100
           ? "99+"
           : userUnseenCount.toString()
       : "0";
   String get getFcsUnseenCount => fcsUnseenCount != null
-      ? fcsUnseenCount! > 100
+      ? fcsUnseenCount > 100
           ? "99+"
           : fcsUnseenCount.toString()
       : "0";
@@ -72,8 +72,8 @@ class User {
       this.privileges = const [],
       this.lastMessage,
       this.lastMessageTime,
-      this.userUnseenCount,
+      this.userUnseenCount = 0,
-      this.fcsUnseenCount,
+      this.fcsUnseenCount = 0,
       this.preferCurrency});
 
   factory User.fromJson(Map<String, dynamic> json) {

lib/pages/buying_instruction/buying_online.dart

@@ -1,6 +1,5 @@
 import 'package:fcs/helpers/theme.dart';
 import 'package:fcs/pages/main/model/main_model.dart';
-import 'package:fcs/pages/main/util.dart';
 import 'package:fcs/pages/widgets/display_text.dart';
 import 'package:fcs/pages/widgets/fcs_id_icon.dart';
 import 'package:fcs/pages/widgets/local_text.dart';
@@ -28,22 +27,22 @@ class _BuyingOnlinePagetate extends State<BuyingOnlinePage>
     MainModel mainModel = Provider.of<MainModel>(context);
 
     final phoneNumberBox = DisplayText(
-      text: mainModel.user.phone,
+      text: mainModel.user?.phone,
       labelTextKey: "contact.phone",
       iconData: Icons.location_on,
     );
     final nameBox = Center(
         child: Text(
-      mainModel.user.name,
+      mainModel.user?.name ?? "",
       style: TextStyle(fontSize: 18, color: primaryColor),
     ));
     final fcsIdBox = DisplayText(
-      text: mainModel.user.fcsID,
+      text: mainModel.user?.fcsID,
       labelTextKey: "customer.fcs.id",
       icon: FcsIDIcon(),
     );
     final shippingAddressBox = DisplayText(
-      text: mainModel.setting.usaAddress,
+      text: mainModel.setting?.usaAddress,
       labelTextKey: "profile.usa.shipping.address",
       iconData: Icons.location_on,
     );

lib/pages/carton/model/carton_model.dart

@@ -3,9 +3,7 @@ import 'dart:async';
 import 'package:cloud_firestore/cloud_firestore.dart';
 import 'package:fcs/data/services/services.dart';
 import 'package:fcs/domain/constants.dart';
-import 'package:fcs/domain/entities/cargo_type.dart';
 import 'package:fcs/domain/entities/carton.dart';
-import 'package:fcs/domain/vo/message.dart';
 import 'package:fcs/domain/vo/shipment_status.dart';
 import 'package:fcs/helpers/paginator.dart';
 import 'package:fcs/pages/main/model/base_model.dart';
@@ -14,13 +12,14 @@ import 'package:logging/logging.dart';
 
 class CartonModel extends BaseModel {
   List<Carton> _boxes = [];
-  PaginatorListener cartonsByFilter;
+  PaginatorListener? cartonsByFilter;
 
   final log = Logger('CartonModel');
-  List<Carton> get boxes =>
+  List<Carton> get boxes => _selectedIndex == 1
-      _selectedIndex == 1 ? _boxes : List<Carton>.from(_delivered.values);
+      ? _boxes
+      : List<Carton>.from(_delivered?.values ?? []);
 
-  Paginator _delivered;
+  Paginator? _delivered;
   int _selectedIndex = 1;
   int _selectedIndexFilter = 1;
   bool isLoading = false;
@@ -87,17 +86,17 @@ class CartonModel extends BaseModel {
     notifyListeners();
   }
 
-  get selectedIndex => _selectedIndex;
+  int get selectedIndex => _selectedIndex;
-  get selectedIndexFilter => _selectedIndexFilter;
+  int get selectedIndexFilter => _selectedIndexFilter;
 
   initData() async {
     _selectedIndex = 1;
     _selectedIndexFilter = 1;
     _loadBoxes();
 
-    if (_delivered != null) _delivered.close();
+    if (_delivered != null) _delivered!.close();
     _delivered = _getDelivered();
-    _delivered.load();
+    _delivered!.load();
   }
 
   @override

lib/pages/chat/model/message_model.dart

@@ -26,7 +26,8 @@ class MessageModel extends BaseModel {
   StreamSubscription<QuerySnapshot> listener;
 
   static const int rowPerLoad = 20;
-  void initQuery(String userID) {
+  void initQuery(String? userID) {
+    if(userID == null)return;
     this.messages = [];
     this.userID = userID;
     this.prevSnap = null;

lib/pages/customer/model/customer_model.dart

@@ -90,7 +90,7 @@ class CustomerModel extends BaseModel {
     }
   }
 
-  Future<User> getUser(String id) async {
+  Future<User> getUser(String? id) async {
     String path = "/$user_collection";
     var snap = await Firestore.instance.collection(path).document(id).get();
     return User.fromMap(snap.data, snap.documentID);

lib/pages/invoice/box_addition.dart

@@ -45,7 +45,7 @@ class _BoxAdditionState extends State<BoxAddition> {
             onPressed: () => Navigator.of(context).pop(),
           ),
           backgroundColor: primaryColor,
-          title: Text(AppTranslations.of(context).text("box.edit.title")),
+          title: Text(AppTranslations.of(context)!.text("box.edit.title")),
         ),
         body: Card(
           child: Column(

lib/pages/invoice/editor/invoice_carton_table.dart

@@ -38,7 +38,7 @@ class InvoiceCartonTable extends StatelessWidget {
         ? [Container()]
         : cartons!.asMap().entries.map((p) {
             return Container(
-              color: p.value.isChecked
+              color: p.value.isChecked!
                   ? Colors.grey.withOpacity(0.2)
                   : Colors.grey.shade50.withOpacity(0.2),
               child: Container(
@@ -56,7 +56,7 @@ class InvoiceCartonTable extends StatelessWidget {
                 child: Row(
                   children: <Widget>[
                     onSelect == null
-                        ? p.value.isChecked
+                        ? p.value.isChecked!
                             ? SizedBox(
                                 child: Icon(Icons.check, color: primaryColor),
                                 width: 30)
@@ -72,7 +72,7 @@ class InvoiceCartonTable extends StatelessWidget {
                       crossAxisAlignment: CrossAxisAlignment.start,
                       children: [
                         Text(
-                          p.value.cartonNumber,
+                          p.value.cartonNumber!,
                           style: textStyle,
                         ),
                       ],

lib/pages/invoice/editor/invoice_discount_list.dart

@@ -68,7 +68,7 @@ class InvoiceDiscountList extends StatelessWidget {
         onSelectChanged: (value) => Navigator.pop(context, c),
         cells: [
           MyDataCell(new Text(
-            c.code,
+            c.code!,
             style: textStyle,
           )),
           MyDataCell(

lib/pages/invoice/editor/invoice_editor.dart

@@ -91,7 +91,7 @@ class _InvoiceEditorState extends State<InvoiceEditor> {
   _loadCartons() async {
     CartonModel cartonModel = Provider.of<CartonModel>(context, listen: false);
     List<Carton> cartons = await cartonModel.getCartonsForInvoice(
-        widget.fcsShipment!.id, widget.customer!.id);
+        widget.fcsShipment!.id!, widget.customer!.id!);
     cartons.forEach((c) {
       c.isChecked = true;
     });
@@ -104,7 +104,7 @@ class _InvoiceEditorState extends State<InvoiceEditor> {
     ShipmentModel shipmentModel =
         Provider.of<ShipmentModel>(context, listen: false);
     List<Shipment> shipments = await shipmentModel.getShipmentWithHandlingFee(
-        widget.fcsShipment!.id, widget.customer!.id);
+        widget.fcsShipment!.id!, widget.customer!.id!);
     shipments.forEach((s) {
       s.isSelected = true;
     });
@@ -117,7 +117,7 @@ class _InvoiceEditorState extends State<InvoiceEditor> {
   _loadDiscount() async {
     DiscountModel discountModel =
         Provider.of<DiscountModel>(context, listen: false);
-    discounts = await discountModel.getDiscount(widget.customer!.id);
+    discounts = (await discountModel.getDiscount(widget.customer!.id!))!;
     if (discounts != null && discounts.length > 0) {
       setState(() {
         _invoice!.discount = discounts.first;
@@ -281,7 +281,7 @@ class _InvoiceEditorState extends State<InvoiceEditor> {
         Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            Text(dateFormatter.format(_invoice!.invoiceDate)),
+            Text(dateFormatter.format(_invoice!.invoiceDate!)),
             SizedBox(
               height: 10,
             ),
@@ -429,7 +429,7 @@ class _InvoiceEditorState extends State<InvoiceEditor> {
       invoice.cargoTypes = cargoTypes;
       invoice.amount = amount;
       invoice.handlingFee = _invoice!.getHandlingFee();
-      invoice.cartons = _invoice!.cartons.where((c) => c.isChecked).toList();
+      invoice.cartons = _invoice!.cartons.where((c) => c.isChecked!).toList();
       invoice.shipments =
           _invoice!.shipments.where((s) => s.isSelected).toList();
       invoice.discount = _invoice!.discount;

lib/pages/invoice/editor/invoice_handling_fee_list.dart

@@ -72,7 +72,7 @@ class InvoiceHandlingFeeList extends StatelessWidget {
         onSelectChanged: (value) => Navigator.pop(context, c),
         cells: [
           MyDataCell(new Text(
-            c.shipmentNumber,
+            c.shipmentNumber!,
             style: textStyle,
           )),
           MyDataCell(

lib/pages/invoice/invoice_customer_list.dart

@@ -33,7 +33,7 @@ class _InvoiceCustomerListState extends State<InvoiceCustomerList> {
   _load() async {
     CustomerModel customerModel =
         Provider.of<CustomerModel>(context, listen: false);
-    var users = await customerModel.getInvoiceUsers(widget.fcsShipment!.id);
+    var users = await customerModel.getInvoiceUsers(widget.fcsShipment!.id!);
     setState(() {
       _users = users;
     });
@@ -125,7 +125,7 @@ class _InvoiceCustomerListState extends State<InvoiceCustomerList> {
                             Padding(
                               padding: const EdgeInsets.only(top: 2.0),
                               child: new Text(
-                                customer.name,
+                                customer.name!,
                                 style: new TextStyle(
                                     fontSize: 20.0, color: primaryColor),
                               ),
@@ -133,7 +133,7 @@ class _InvoiceCustomerListState extends State<InvoiceCustomerList> {
                             Padding(
                               padding: const EdgeInsets.only(top: 2.0),
                               child: new Text(
-                                customer.phoneNumber,
+                                customer.phoneNumber!,
                                 style: new TextStyle(
                                     fontSize: 15.0, color: Colors.grey),
                               ),

lib/pages/invoice/invoice_info.dart

@@ -118,7 +118,7 @@ class _InvoiceInfoState extends State<InvoiceInfo> {
         Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            Text(dateFormatter.format(_invoice!.invoiceDate)),
+            Text(dateFormatter.format(_invoice!.invoiceDate!)),
             SizedBox(
               height: 5,
             ),
@@ -140,7 +140,7 @@ class _InvoiceInfoState extends State<InvoiceInfo> {
     );
     final paymentMethodBox = DisplayText(
       labelTextKey: "invoice.payment_method",
-      text: _invoice!.paymentMethod.name,
+      text: _invoice!.paymentMethod!.name,
     );
 
     final cancelBtn = LocalButton(

lib/pages/invoice/invoice_list_row.dart

@@ -58,7 +58,7 @@ class InvoiceListRow extends StatelessWidget {
                                 fontSize: 13.0, color: primaryColor),
                           ),
                           new Text(
-                            dateFormatter.format(invoice!.invoiceDate),
+                            dateFormatter.format(invoice!.invoiceDate!),
                             style: new TextStyle(
                                 fontSize: 15.0, color: Colors.grey),
                           )

lib/pages/invoice/invoice_shipment_list_row.dart

@@ -64,7 +64,7 @@ class _InvoiceShipmentListRowState extends State<InvoiceShipmentListRow> {
                             child: new Text(
                               _fcsShipment.shipmentNumber == null
                                   ? ''
-                                  : _fcsShipment.shipmentNumber,
+                                  : _fcsShipment.shipmentNumber!,
                               style: new TextStyle(
                                   fontSize: 15.0, color: Colors.black),
                             ),
@@ -72,7 +72,7 @@ class _InvoiceShipmentListRowState extends State<InvoiceShipmentListRow> {
                           Padding(
                             padding: const EdgeInsets.only(left: 10.0, top: 10),
                             child: new Text(
-                              dateFormatter.format(_fcsShipment.cutoffDate),
+                              dateFormatter.format(_fcsShipment.cutoffDate!),
                               style: new TextStyle(
                                   fontSize: 15.0, color: Colors.grey),
                             ),
@@ -86,7 +86,7 @@ class _InvoiceShipmentListRowState extends State<InvoiceShipmentListRow> {
             ),
             Padding(
               padding: const EdgeInsets.all(0),
-              child: getStatus(_fcsShipment.status),
+              child: getStatus(_fcsShipment.status!),
             ),
           ],
         ),

lib/pages/invoice/invoice_table.dart

@@ -61,16 +61,16 @@ class InvoiceTable extends StatelessWidget {
   List<InvoiceTableRow> getTableRows() {
     List<InvoiceTableRow> tableRows = [];
     // add cargo types
-    List<CargoType> _cargoTypes = invoice!.getCargoTypes(rate!) ?? [];
+    List<CargoType> _cargoTypes = invoice!.getCargoTypes(rate!);
     _cargoTypes.forEach((c) {
       tableRows.add(InvoiceTableRow(
           invoiceDataType: InvoiceDataType.CargoDataType,
           desc: c.name,
           rate:
-              "${c.calWeight!.toStringAsFixed(2)} x ${c.calRate!.toStringAsFixed(2)}",
+              "${c.calWeight.toStringAsFixed(2)} x ${c.calRate.toStringAsFixed(2)}",
           amount: "${c.calAmount.toStringAsFixed(2)}"));
     });
-    invoice!.shipments.where((ss) => (ss.isSelected ?? false)).forEach((s) {
+    invoice!.shipments.where((ss) => (ss.isSelected )).forEach((s) {
       tableRows.add(InvoiceTableRow(
           data: s,
           invoiceDataType: InvoiceDataType.HandlingFeeType,
@@ -95,7 +95,7 @@ class InvoiceTable extends StatelessWidget {
         invoiceDataType: InvoiceDataType.DeliveryFeeType,
         desc: "Delivery fee",
         rate: "",
-        amount: "${invoice?.deliveryFee?.toStringAsFixed(2) ?? '0'}"));
+        amount: "${invoice?.deliveryFee.toStringAsFixed(2) ?? '0'}"));
 
     // // add discounts
     if (invoice!.discount != null) {
@@ -104,7 +104,7 @@ class InvoiceTable extends StatelessWidget {
           invoiceDataType: InvoiceDataType.DiscountDataType,
           desc: "Discount\n${invoice?.discount?.code ?? ""}",
           rate: "",
-          amount: "(${invoice?.discount?.amount?.toStringAsFixed(2) ?? ''})"));
+          amount: "(${invoice?.discount?.amount.toStringAsFixed(2) ?? ''})"));
     }
 
     return tableRows;

lib/pages/invoice/model/invoice_model.dart

@@ -15,14 +15,14 @@ import 'package:path/path.dart' as Path;
 class InvoiceModel extends BaseModel {
   final log = Logger('InvoiceModel');
 
-  StreamSubscription<QuerySnapshot> listener;
+  StreamSubscription<QuerySnapshot<Map<String, dynamic>>>? listener;
 
   List<Invoice> _invoices = [];
 
   List<Invoice> get invoices =>
       _selectedIndex == 1 ? _invoices : List<Invoice>.from(_paginator.values);
 
-  Paginator _paginator;
+  late Paginator _paginator;
 
   bool endOfPaidInvoices = false;
   bool isLoading = false;
@@ -33,7 +33,7 @@ class InvoiceModel extends BaseModel {
     notifyListeners();
   }
 
-  get selectedIndex => _selectedIndex;
+  int get selectedIndex => _selectedIndex;
 
   @override
   void privilegeChanged() {
@@ -54,11 +54,11 @@ class InvoiceModel extends BaseModel {
     if (user == null) return;
     if (!forCustomer && !user.hasInvoices()) return;
     String path = "/$invoices_collection";
-    if (listener != null) listener.cancel();
+    if (listener != null) listener!.cancel();
     _invoices = [];
 
     try {
-      var q = Firestore.instance
+      var q = FirebaseFirestore.instance
           .collection("$path")
           .where("status", isEqualTo: invoice_issued_status)
           .where("is_deleted", isEqualTo: false);
@@ -69,9 +69,9 @@ class InvoiceModel extends BaseModel {
 
       listener = q.snapshots().listen((QuerySnapshot snapshot) {
         _invoices.clear();
-        _invoices = snapshot.documents.map((documentSnapshot) {
+        _invoices = snapshot.docs.map((documentSnapshot) {
-          var s = Invoice.fromMap(
+          var s = Invoice.fromMap(documentSnapshot.data as Map<String, dynamic>,
-              documentSnapshot.data, documentSnapshot.documentID);
+              documentSnapshot.id);
           return s;
         }).toList();
         notifyListeners();
@@ -85,7 +85,7 @@ class InvoiceModel extends BaseModel {
     if (!isCustomer) {
       if (user == null || !(user.hasInvoices())) throw "No privilege";
     }
-    var pageQuery = Firestore.instance
+    var pageQuery = FirebaseFirestore.instance
         .collection("/$invoices_collection")
         .where("is_deleted", isEqualTo: false);
     if (isCustomer) {
@@ -105,7 +105,7 @@ class InvoiceModel extends BaseModel {
     return paginator;
   }
 
-  Future<void> loadMore({bool isCustomer}) async {
+  Future<void> loadMore({bool? isCustomer}) async {
     if (_paginator.ended || _selectedIndex == 1)
       return; // when paid menu is not selected return
     isLoading = true;
@@ -116,7 +116,7 @@ class InvoiceModel extends BaseModel {
     });
   }
 
-  Future<void> refresh({bool isCustomer}) async {
+  Future<void> refresh({bool? isCustomer}) async {
     if (_selectedIndex == 1) return; // when paid menu is not selected return
     await _paginator.refresh(onFinished: () {
       notifyListeners();
@@ -129,17 +129,17 @@ class InvoiceModel extends BaseModel {
 
   logout() async {
     if (_paginator != null) _paginator.close();
-    if (listener != null) await listener.cancel();
+    if (listener != null) await listener!.cancel();
     _invoices = [];
   }
 
-  Future<Invoice> getInvoice(String id) async {
+  Future<Invoice?> getInvoice(String id) async {
     String path = "/$invoices_collection";
     try {
-      var ref = Firestore.instance.collection("$path").document(id);
+      var ref = FirebaseFirestore.instance.collection("$path").doc(id);
-      var snap = await ref.get(source: Source.server);
+      var snap = await ref.get(const GetOptions(source: Source.server));
       if (snap.exists) {
-        var s = Invoice.fromMap(snap.data, snap.documentID);
+        var s = Invoice.fromMap(snap.data as Map<String, dynamic>, snap.id);
         return s;
       }
     } catch (e) {

lib/pages/invoice/payment/payment_page.dart

@@ -50,9 +50,9 @@ class _PaymentPageState extends State<PaymentPage> {
   _loadInvoice() async {
     InvoiceModel invoiceModel =
         Provider.of<InvoiceModel>(context, listen: false);
-    Invoice i = await invoiceModel.getInvoice(_invoice.id);
+    Invoice? i = await invoiceModel.getInvoice(_invoice.id!);
     setState(() {
-      _invoice = i;
+      _invoice = i!;
     });
   }
 
@@ -97,7 +97,7 @@ class _PaymentPageState extends State<PaymentPage> {
             onPressed: () => Navigator.of(context).pop(),
           ),
           backgroundColor: primaryColor,
-          title: Text(AppTranslations.of(context).text("pm_.title")),
+          title: Text(AppTranslations.of(context)!.text("pm_.title")),
         ),
         body: ListView(
           padding: const EdgeInsets.all(10.0),
@@ -133,8 +133,8 @@ class _PaymentPageState extends State<PaymentPage> {
       return Container(
         decoration: BoxDecoration(
             border: Border(bottom: BorderSide(color: Colors.grey))),
-            padding: const EdgeInsets.only(
+        padding:
-                left: 5.0, right: 5.0, top: 5.0, bottom: 5.0),
+            const EdgeInsets.only(left: 5.0, right: 5.0, top: 5.0, bottom: 5.0),
         child: Row(
           children: [
             Expanded(
@@ -145,7 +145,7 @@ class _PaymentPageState extends State<PaymentPage> {
                     Padding(
                       padding: const EdgeInsets.only(left: 8.0),
                       child: Text(
-                              '${p.paymentDate != null ? dateFormatter.format(p.paymentDate) : ""}'),
+                          '${p.paymentDate != null ? dateFormatter.format(p.paymentDate!) : ""}'),
                     ),
                     SizedBox(
                       height: 5,
@@ -153,7 +153,7 @@ class _PaymentPageState extends State<PaymentPage> {
                     LocalImagePicker(
                       key: ValueKey(p.id),
                       enabled: false,
-                          initialImgUrl: p.paymentReceiptURL,
+                      initialImgUrl: p.paymentReceiptURL!,
                       title: "Receipt",
                       color: primaryColor,
                     )
@@ -187,8 +187,7 @@ class _PaymentPageState extends State<PaymentPage> {
                                 onTap: () => _cancel(p),
                                 child: Padding(
                                   padding: const EdgeInsets.all(8.0),
-                                      child: Icon(Icons.close,
+                                  child: Icon(Icons.close, color: primaryColor),
-                                          color: primaryColor),
                                 ),
                               ),
                             ]

lib/pages/invoice/payment/payment_page_edit.dart

@@ -154,7 +154,7 @@ class _PaymentPageEditState extends State<PaymentPageEdit> {
             onPressed: () => Navigator.of(context).pop(),
           ),
           backgroundColor: primaryColor,
-          title: Text(AppTranslations.of(context).text("pm_.title")),
+          title: Text(AppTranslations.of(context)!.text("pm_.title")),
         ),
         body: Padding(
           padding: const EdgeInsets.all(8.0),
@@ -189,7 +189,7 @@ class _PaymentPageEditState extends State<PaymentPageEdit> {
         _widget = initialImage();
       } else {
         _widget = InkWell(
-          child: Image.asset(widget.receipt!.fileUrl, fit: BoxFit.cover),
+          child: Image.asset(widget.receipt!.fileUrl!, fit: BoxFit.cover),
           onTap: () {},
         );
       }

lib/pages/main/home_page.dart

@@ -84,7 +84,7 @@ class _HomePageState extends State<HomePage> {
   }
 
   _loadStaffMode(bool isCustomer) async {
-    bool staffMode = await SharedPref.getStaffMode();
+    bool? staffMode = await SharedPref.getStaffMode();
     setState(() {
       if (isCustomer) {
         isFcs[0] = false;
@@ -117,12 +117,12 @@ class _HomePageState extends State<HomePage> {
     if (mainModel.isLogin()) {
       timer.cancel();
       bool isCustomer = mainModel.isCustomer();
-      String receiverID = isCustomer ? mainModel.user.id : notiUserID;
+      String? receiverID = isCustomer ? mainModel.user?.id : notiUserID;
-      String receiverName = isCustomer ? mainModel.user.name : notiUserName;
+      String? receiverName = isCustomer ? mainModel.user?.name : notiUserName;
       MessageModel messageModel =
           Provider.of<MessageModel>(context, listen: false);
       messageModel.initQuery(receiverID);
-      User user = mainModel.user;
+      User user = mainModel.user!;
       if (!isCustomer) {
         CustomerModel customerModel =
             Provider.of<CustomerModel>(context, listen: false);
@@ -133,15 +133,15 @@ class _HomePageState extends State<HomePage> {
           MaterialPageRoute(
               builder: (context) => MessageDetail(
                     messageModel: messageModel,
-                    receiverID: receiverID,
+                    receiverID: receiverID ?? "",
-                    receiverName: receiverName,
+                    receiverName: receiverName ?? "",
                   ))).then((value) {
         if (user.userUnseenCount > 0) {
-          messageModel.seenMessages(user.id, true);
+          messageModel.seenMessages(user.id ?? "", true);
         }
       });
       if (user.userUnseenCount > 0) {
-        messageModel.seenMessages(user.id, true);
+        messageModel.seenMessages(user.id ?? "", true);
       }
     }
   }
@@ -204,7 +204,7 @@ class _HomePageState extends State<HomePage> {
 
   @override
   Widget build(BuildContext context) {
-    User user = Provider.of<MainModel>(context).user;
+    User? user = Provider.of<MainModel>(context).user;
 
     if (user == null) {
       Future.microtask(
@@ -280,11 +280,11 @@ class _HomePageState extends State<HomePage> {
       ))
           .then((value) {
         if (user.userUnseenCount > 0) {
-          messageModel.seenMessages(user.id, true);
+          messageModel.seenMessages(user.id ?? "", true);
         }
       });
       if (user.userUnseenCount > 0) {
-        messageModel.seenMessages(user.id, true);
+        messageModel.seenMessages(user.id ?? "", true);
       }
     });
     final notiBtn = badgeCounter(notiBtnOrg, user.userUnseenCount);

lib/pages/main/initial_language_selection.dart

@@ -101,8 +101,8 @@ class _InitialLanguageSelectionPageState
                                   ? BoxDecoration()
                                   : BoxDecoration(
                                       border: Border(
-                                        bottom:
+                                        bottom: BorderSide(
-                                            BorderSide(color: Colors.grey.shade300),
+                                            color: Colors.grey.shade300),
                                       ),
                                     ),
                               child: ListTile(

lib/pages/main/model/base_model.dart

@@ -6,9 +6,9 @@ import 'package:fcs/helpers/api_helper.dart';
 import 'main_model.dart';
 
 abstract class BaseModel extends ChangeNotifier {
-  User user;
+  User? user;
-  Setting setting;
+  Setting? setting;
-  MainModel mainModel;
+  MainModel? mainModel;
 
   void initUser(User user) async {
     this.user = user;
@@ -16,7 +16,7 @@ abstract class BaseModel extends ChangeNotifier {
 
   void privilegeChanged() {}
 
-  void initSetting(Setting setting) async {
+  void initSetting(Setting? setting) async {
     this.setting = setting;
   }
 
@@ -32,8 +32,8 @@ abstract class BaseModel extends ChangeNotifier {
     String path,
     method, {
     dynamic payload,
-    String token,
+    required String token,
-    String url,
+    String? url,
   }) async {
     return await requestAPI(path, method,
         payload: payload, token: token, url: url);

lib/pages/main/model/language_model.dart

@@ -5,7 +5,7 @@ import 'package:flutter/painting.dart';
 import 'base_model.dart';
 
 class LanguageModel extends BaseModel {
-  String language;
+  late String language;
   bool get isEng => this.language == "English";
   List<bool> get currentState => isEng ? [true, false] : [false, true];
 

lib/pages/main/model/main_model.dart

@@ -15,16 +15,16 @@ class MainModel extends ChangeNotifier {
   final log = Logger('MainModel');
   List<BaseModel> models = [];
 
-  String messagingToken;
+  String? messagingToken;
-  User user;
+  User? user;
-  PackageInfo packageInfo;
+  PackageInfo? packageInfo;
 
   set setMessaginToken(token) {
     this.messagingToken = token;
     uploadMsgToken();
   }
 
-  Setting setting;
+  Setting? setting;
 
   bool isLoaded = false;
   bool isOnline = false;
@@ -42,23 +42,23 @@ class MainModel extends ChangeNotifier {
   }
 
   bool faqEditable() {
-    return this.user != null && this.user.hasSupport();
+    return this.user != null && this.user!.hasSupport();
   }
 
   bool rateEditable() {
-    return this.user != null && this.user.hasSupport();
+    return this.user != null && this.user!.hasSupport();
   }
 
   bool paymentMethodsEditable() {
-    return this.user != null && this.user.hasSupport();
+    return this.user != null && this.user!.hasSupport();
   }
 
   bool termEditable() {
-    return this.user != null && this.user.hasSupport();
+    return this.user != null && this.user!.hasSupport();
   }
 
   bool contactEditable() {
-    return this.user != null && this.user.hasSupport();
+    return this.user != null && this.user!.hasSupport();
   }
 
   bool isLogin() {
@@ -66,32 +66,31 @@ class MainModel extends ChangeNotifier {
   }
 
   bool isCustomer() {
-    return user != null && user.isCustomer();
+    return user != null && user!.isCustomer();
   }
 
   bool isSysAdmin() {
-    return this.user != null && this.user.hasSysAdmin();
+    return this.user != null && this.user!.hasSysAdmin();
   }
 
   bool isAdmin() {
-    return this.user != null && this.user.hasAdmin();
+    return this.user != null && this.user!.hasAdmin();
   }
 
   // userListener should never be closed
-  StreamSubscription<User> userListener;
+  StreamSubscription<User?>? userListener;
   _init() async {
     await _listenSetting();
-    this.isFirstLaunch = await SharedPref.isFirstLaunch();
+    this.isFirstLaunch = await SharedPref.isFirstLaunch() ?? true;
-    this.isFirstLaunch = this.isFirstLaunch ?? true;
     this.packageInfo = await PackageInfo.fromPlatform();
 
-    if (userListener != null) userListener.cancel();
+    if (userListener != null) userListener!.cancel();
     userListener =
         Services.instance.authService.getUserStream().listen((_user) {
       if (_user != null) {
         models.forEach((m) => m.initUser(_user));
         // call diffPrivileges if privilege changed or first time login
-        if (this.user == null || _user.diffPrivileges(this.user)) {
+        if (this.user == null || _user.diffPrivileges(this.user!)) {
           models.forEach((m) => m.privilegeChanged());
         }
         if (this.user == null) {
@@ -124,7 +123,7 @@ class MainModel extends ChangeNotifier {
 
   bool isSupport() {
     if (packageInfo == null || setting == null) return false;
-    return int.parse(packageInfo.buildNumber) >= setting.supportBuildNum;
+    return int.parse(packageInfo!.buildNumber) >= setting!.supportBuildNum;
   }
 
   Future<AuthResult> sendSms(String phoneNumber) {
@@ -137,14 +136,14 @@ class MainModel extends ChangeNotifier {
     return authResult;
   }
 
-  Future<void> uploadMsgToken() {
+  Future<void>? uploadMsgToken() {
     if (messagingToken == null || user == null) return null;
-    return Services.instance.userService.uploadMsgToken(messagingToken);
+    return Services.instance.userService.uploadMsgToken(messagingToken!);
   }
 
-  Future<void> removeMsgToken() {
+  Future<void>? removeMsgToken() {
     if (messagingToken == null || user == null) return null;
-    return Services.instance.userService.removeMsgToken(messagingToken);
+    return Services.instance.userService.removeMsgToken(messagingToken!);
   }
 
   Future<void> signout() async {

lib/pages/market/market_editor.dart

@@ -35,7 +35,7 @@ class _MarketEditorState extends State<MarketEditor> {
         children: <Widget>[
           Expanded(
             child: new Text(
-              p.name,
+              p.name ?? "",
               style: TextStyle(
                 fontSize: 15.0,
               ),
@@ -117,7 +117,7 @@ class _MarketEditorState extends State<MarketEditor> {
     });
     MarketModel marketModel = Provider.of<MarketModel>(context, listen: false);
     try {
-      await marketModel.deleteMarket(market.id);
+      await marketModel.deleteMarket(market.id!);
     } catch (e) {
       showMsgDialog(context, "Error", e.toString());
     } finally {

lib/pages/market/model/market_model.dart

@@ -20,14 +20,14 @@ class MarketModel extends BaseModel {
     try {
       if (listener != null) listener.cancel();
 
-      listener = Firestore.instance
+      listener = FirebaseFirestore.instance
           .collection("/$config_collection/$setting_doc_id/$markets_collection")
           .snapshots()
           .listen((QuerySnapshot snapshot) {
         markets.clear();
-        markets = snapshot.documents.map((documentSnapshot) {
+        markets = snapshot.docs.map((documentSnapshot) {
           var user = Market.fromMap(
-              documentSnapshot.data, documentSnapshot.documentID);
+              documentSnapshot.data as Map<String, dynamic>, documentSnapshot.id);
           return user;
         }).toList();
         notifyListeners();

lib/pages/package/model/package_model.dart

@@ -16,9 +16,9 @@ import 'package:path/path.dart' as Path;
 class PackageModel extends BaseModel {
   final log = Logger('PackageModel');
 
-  PaginatorListener packages;
+  PaginatorListener? packages;
-  PaginatorListener customerPackages;
+  PaginatorListener? customerPackages;
-  PaginatorListener activePackages;
+  PaginatorListener? activePackages;
 
   bool isLoading = false;
   int _menuSelectedIndex = 1;
@@ -32,7 +32,7 @@ class PackageModel extends BaseModel {
     notifyListeners();
   }
 
-  get menuSelectedIndex => _menuSelectedIndex;
+  int get menuSelectedIndex => _menuSelectedIndex;
 
   void privilegeChanged() {
     if (user != null) {
@@ -63,9 +63,9 @@ class PackageModel extends BaseModel {
 
   @override
   logout() async {
-    if (customerPackages != null) customerPackages.close();
+    if (customerPackages != null) customerPackages!.close();
-    if (packages != null) packages.close();
+    if (packages != null) packages!.close();
-    if (activePackages != null) activePackages.close();
+    if (activePackages != null) activePackages!.close();
   }
 
   Future<void> _loadPackages(bool isDelivered) async {
@@ -75,15 +75,15 @@ class PackageModel extends BaseModel {
     String path = "/$packages_collection";
 
     try {
-      Query listenerQuery = Firestore.instance
+      Query listenerQuery = FirebaseFirestore.instance
           .collection(path)
           .where("is_delivered", isEqualTo: isDelivered);
-      Query pageQuery = Firestore.instance
+      Query pageQuery = FirebaseFirestore.instance
           .collection(path)
           .where("is_delivered", isEqualTo: isDelivered);
 
       pageQuery = pageQuery.orderBy("update_time", descending: true);
-      packages.refresh(listeningQuery: listenerQuery, pageQuery: pageQuery);
+      packages!.refresh(listeningQuery: listenerQuery, pageQuery: pageQuery);
     } catch (e) {
       log.warning("Error!! $e");
     }
@@ -94,17 +94,17 @@ class PackageModel extends BaseModel {
     String path = "/$packages_collection";
 
     try {
-      Query listenerQuery = Firestore.instance
+      Query listenerQuery = FirebaseFirestore.instance
           .collection(path)
           .where("is_delivered", isEqualTo: isDelivered)
           .where("user_id", isEqualTo: user.id);
-      Query pageQuery = Firestore.instance
+      Query pageQuery = FirebaseFirestore.instance
           .collection(path)
           .where("is_delivered", isEqualTo: isDelivered)
           .where("user_id", isEqualTo: user.id)
           .orderBy("update_time", descending: true);
 
-      customerPackages.refresh(
+      customerPackages!.refresh(
           listeningQuery: listenerQuery, pageQuery: pageQuery);
     } catch (e) {
       log.warning("Error!! $e");
@@ -118,29 +118,30 @@ class PackageModel extends BaseModel {
     String path = "/$packages_collection";
 
     try {
-      Query listenerQuery = Firestore.instance
+      Query listenerQuery = FirebaseFirestore.instance
           .collection(path)
           .where("is_delivered", isEqualTo: false);
-      Query pageQuery = Firestore.instance
+      Query pageQuery = FirebaseFirestore.instance
           .collection(path)
           .where("is_delivered", isEqualTo: false);
 
       pageQuery = pageQuery.orderBy("update_time", descending: true);
-      activePackages.refresh(
+      activePackages!.refresh(
           listeningQuery: listenerQuery, pageQuery: pageQuery);
     } catch (e) {
       log.warning("Error!! $e");
     }
   }
 
-  Future<Package> getPackage(String id) async {
+  Future<Package?> getPackage(String id) async {
     if (user == null) return null;
     String path = "/$packages_collection";
     try {
       DocumentSnapshot snap =
-          await Firestore.instance.collection("$path").document(id).get();
+          await FirebaseFirestore.instance.collection("$path").doc(id).get();
       if (snap.exists) {
-        var package = Package.fromMap(snap.data, snap.documentID);
+        var package =
+            Package.fromMap(snap.data as Map<String, dynamic>, snap.id);
         return package;
       }
     } catch (e) {
@@ -149,18 +150,18 @@ class PackageModel extends BaseModel {
     return null;
   }
 
-  Future<Package> getPackageByTrackingID(String trackingID) async {
+  Future<Package?> getPackageByTrackingID(String trackingID) async {
     if (user == null) return null;
     String path = "/$packages_collection";
     try {
-      var snaps = await Firestore.instance
+      var snaps = await FirebaseFirestore.instance
           .collection("$path")
           .where("tracking_id", isEqualTo: trackingID)
           .where("is_deleted", isEqualTo: false)
-          .getDocuments(source: Source.server);
+          .get(const GetOptions(source: Source.server));
-      if (snaps.documents.length == 1) {
+      if (snaps.docs.length == 1) {
-        var snap = snaps.documents[0];
+        var snap = snaps.docs[0];
-        var package = Package.fromMap(snap.data, snap.documentID);
+        var package = Package.fromMap(snap.data as Map<String, dynamic>, snap.id);
         return package;
       }
     } catch (e) {
@@ -169,35 +170,35 @@ class PackageModel extends BaseModel {
     return null;
   }
 
-  Future<Package> lookupPackage(String trackingID) async {
+  Future<Package?> lookupPackage(String trackingID) async {
     if (user == null) return null;
     String path = "/$packages_collection";
 
     try {
-      var qsnap = await Firestore.instance
+      var qsnap = await FirebaseFirestore.instance
           .collection("$path")
           .where("tracking_id", isEqualTo: trackingID)
           .where("has_user_id", isEqualTo: false)
           .where("is_deleted", isEqualTo: false)
-          .getDocuments(source: Source.server);
+          .get(const GetOptions(source: Source.server));
-      if (qsnap.documents.length > 0) {
+      if (qsnap.docs.length > 0) {
-        var snap = qsnap.documents[0];
+        var snap = qsnap.docs[0];
         if (snap.exists) {
-          var package = Package.fromMap(snap.data, snap.documentID);
+          var package = Package.fromMap(snap.data as Map<String, dynamic>, snap.id);
           return package;
         }
       }
 
-      qsnap = await Firestore.instance
+      qsnap = await FirebaseFirestore.instance
           .collection("$path")
           .where("tracking_id", isEqualTo: trackingID)
           .where("user_id", isEqualTo: user.id)
           .where("is_deleted", isEqualTo: false)
-          .getDocuments(source: Source.server);
+          .get(const GetOptions(source: Source.server));
-      if (qsnap.documents.length > 0) {
+      if (qsnap.docs.length > 0) {
-        var snap = qsnap.documents[0];
+        var snap = qsnap.docs[0];
         if (snap.exists) {
-          var package = Package.fromMap(snap.data, snap.documentID);
+          var package = Package.fromMap(snap.data as Map<String, dynamic>, snap.id);
           return package;
         }
       }
@@ -210,15 +211,15 @@ class PackageModel extends BaseModel {
   Future<List<Package>> getPackages(String userID, List<String> status) async {
     List<Package> packages = [];
     try {
-      var snaps = await Firestore.instance
+      var snaps = await FirebaseFirestore.instance
           .collection("/$packages_collection")
           .where("status", whereIn: status)
           .where("user_id", isEqualTo: userID)
           .where("is_deleted", isEqualTo: false)
-          .getDocuments(source: Source.server);
+          .get(const GetOptions(source: Source.server));
-      packages = snaps.documents.map((documentSnapshot) {
+      packages = snaps.docs.map((documentSnapshot) {
         var p =
-            Package.fromMap(documentSnapshot.data, documentSnapshot.documentID);
+            Package.fromMap(documentSnapshot.data as Map<String, dynamic>, documentSnapshot.id);
         return p;
       }).toList();
     } catch (e) {
@@ -235,22 +236,22 @@ class PackageModel extends BaseModel {
     Future<List<Package>> packages =
         Services.instance.packageService.searchPackage(term);
 
-    Future<List<Package>> packagesFTS =
+    Future<List<Package>?> packagesFTS =
         Services.instance.packageService.ftsSearchPackage(term);
     // Package pkg = await getPackageByTrackingID(term);
     // if (pkg != null && !packages.contains(pkg)) {
     //   packages.insert(0, pkg);
     // }
     List<Package> pkgs = await packages;
-    List<Package> ftsPkgs = await packagesFTS;
+    List<Package>? ftsPkgs = await packagesFTS;
-    pkgs.addAll(ftsPkgs);
+    pkgs.addAll(ftsPkgs!);
     final seen = Set<Package>();
     return pkgs.where((e) => seen.add(e)).toList();
   }
 
   Future<void> createPackages(User user, List<Package> packages) {
     return Services.instance.packageService
-        .createPackages(packages, user.fcsID);
+        .createPackages(packages, user.fcsID!);
   }
 
   Future<void> createReceiving(
@@ -370,10 +371,10 @@ class PackageModel extends BaseModel {
   Future<void> changeDeliveryAddress(
       Package package, DeliveryAddress deliveryAddress) {
     return Services.instance.packageService
-        .changeDeliveryAddress(package.id, deliveryAddress.id);
+        .changeDeliveryAddress(package.id!, deliveryAddress.id!);
   }
 
   Future<void> packageReturn(Package package) {
-    return Services.instance.packageService.packageReturn(package.id);
+    return Services.instance.packageService.packageReturn(package.id!);
   }
 }

lib/pages/widgets/delivery_address_selection.dart

@@ -38,7 +38,7 @@ class _DeliveryAddressSelectionState extends State<DeliveryAddressSelection> {
         Provider.of<DeliveryAddressModel>(context, listen: false);
 
     var deliveryAddresses =
-        await addressModel.getDeliveryAddresses(widget.user!.id);
+        await addressModel.getDeliveryAddresses(widget.user!.id!);
     setState(() {
       this._deliveryAddresses = deliveryAddresses;
     });
@@ -64,7 +64,7 @@ class _DeliveryAddressSelectionState extends State<DeliveryAddressSelection> {
             bool updated = await Navigator.of(context).push(CupertinoPageRoute(
                 builder: (context) =>
                     DeliveryAddressEditor(user: widget.user)));
-            if (updated ?? false) {
+            if (updated) {
               _getDeliverAddresses();
             }
           },
@@ -117,7 +117,7 @@ class _DeliveryAddressSelectionState extends State<DeliveryAddressSelection> {
     bool updated = await Navigator.of(context).push(CupertinoPageRoute(
         builder: (context) => DeliveryAddressEditor(
             user: widget.user, deliveryAddress: deliveryAddress)));
-    if (updated ?? false) {
+    if (updated) {
       _getDeliverAddresses();
     }
   }

lib/pages/widgets/discount_dropdown.dart

@@ -53,7 +53,8 @@ class DiscountDropdown<T> extends StatelessWidget {
                   items: values!.map<DropdownMenuItem<T>>((T value) {
                     return DropdownMenuItem<T>(
                       value: value,
-                      child: Text(value == null ? "" : (value as Discount).code,
+                      child: Text(
+                          value == null ? "" : (value as Discount).code!,
                           overflow: TextOverflow.ellipsis,
                           style: TextStyle(color: primaryColor)),
                     );

lib/pages/widgets/my_data_table.dart

@@ -20,7 +20,7 @@ class MyDataColumn {
   ///
   /// The [label] argument must not be null.
   const MyDataColumn({
-    @required this.label,
+    required this.label,
     this.tooltip,
     this.numeric = false,
     this.onSort,
@@ -40,7 +40,7 @@ class MyDataColumn {
   /// This is a longer description of the column heading, for cases
   /// where the heading might have been abbreviated to keep the column
   /// width to a reasonable size.
-  final String tooltip;
+  final String? tooltip;
 
   /// Whether this column represents numeric data or not.
   ///
@@ -53,7 +53,7 @@ class MyDataColumn {
   /// If null, the column will not be considered sortable.
   ///
   /// See [MyDataTable.sortColumnIndex] and [MyDataTable.sortAscending].
-  final MyDataColumnSortCallback onSort;
+  final MyDataColumnSortCallback? onSort;
 
   bool get _debugInteractive => onSort != null;
 }

lib/pages/widgets/show_multiple_img.dart

@@ -8,14 +8,14 @@ class ShowMultiImage extends StatefulWidget {
   final List<DisplayImageSource> displayImageSources;
   final int initialPage;
   const ShowMultiImage(
-      {Key key, this.displayImageSources, this.initialPage = 0})
+      {Key? key, required this.displayImageSources, this.initialPage = 0})
       : super(key: key);
   @override
   _ShowMultiImageState createState() => _ShowMultiImageState();
 }
 
 class _ShowMultiImageState extends State<ShowMultiImage> {
-  PageController pageController;
+  late PageController pageController;
   @override
   void initState() {
     pageController = PageController(initialPage: widget.initialPage);
@@ -58,7 +58,7 @@ class _ShowMultiImageState extends State<ShowMultiImage> {
                       value: event == null
                           ? 0
                           : event.cumulativeBytesLoaded /
-                              event.expectedTotalBytes,
+                              event.expectedTotalBytes!,
                     ),
                   ),
                 ),

lib/pages/widgets/status_tree.dart

@@ -4,7 +4,7 @@ import 'package:fcs/domain/vo/shipment_status.dart';
 import 'package:fcs/helpers/theme.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter_icons/flutter_icons.dart';
+import 'package:flutter_vector_icons/flutter_vector_icons.dart';
 import 'package:intl/intl.dart';
 import 'package:timeline_list/timeline.dart';
 import 'package:timeline_list/timeline_model.dart';
@@ -12,10 +12,10 @@ import 'package:timeline_list/timeline_model.dart';
 var dateFormatter = new DateFormat('dd MMM yyyy');
 
 class StatusTree extends StatelessWidget {
-  final List<ShipmentStatus> shipmentHistory;
+  final List<ShipmentStatus>? shipmentHistory;
-  final String currentStatus;
+  final String? currentStatus;
 
-  const StatusTree({Key key, this.shipmentHistory, this.currentStatus})
+  const StatusTree({Key? key, this.shipmentHistory, this.currentStatus})
       : super(key: key);
   @override
   Widget build(BuildContext context) {
@@ -39,7 +39,7 @@ class StatusTree extends StatelessWidget {
     if (shipmentHistory == null || currentStatus == null) return [];
     bool isPacked = currentStatus != package_received_status &&
         currentStatus != package_processed_status;
-    return shipmentHistory
+    return shipmentHistory!
         .map((e) => TimelineModel(
             Padding(
               padding: const EdgeInsets.all(18.0),
@@ -48,17 +48,17 @@ class StatusTree extends StatelessWidget {
                 children: <Widget>[
                   Text(e.status,
                       style: TextStyle(
-                          color: e.done ? primaryColor : Colors.grey,
+                          color: e.done! ? primaryColor : Colors.grey,
                           fontSize: 16,
                           fontWeight: FontWeight.bold)),
-                  e.done || isPacked
+                  e.done! || isPacked
                       ? Text(dateFormatter.format(e.date))
                       : Container(),
-                  e.staffName == null ? Container() : Text(e.staffName)
+                  e.staffName == null ? Container() : Text(e.staffName!)
                 ],
               ),
             ),
-            iconBackground: e.done ? primaryColor : Colors.grey,
+            iconBackground: e.done! ? primaryColor : Colors.grey,
             icon: Icon(
               e.status == "shipped"
                   ? Ionicons.ios_airplane

lib/pages/widgets/task_button.dart

@@ -9,11 +9,11 @@ typedef BtnCallback();
 
 /// TaskButton is used to navigate to eash task
 class TaskButton extends StatelessWidget {
-  final String titleKey;
+  final String? titleKey;
-  final IconData icon;
+  final IconData? icon;
-  final BtnCallback btnCallback;
+  final BtnCallback? btnCallback;
 
-  const TaskButton(this.titleKey, {Key key, this.icon, this.btnCallback})
+  const TaskButton(this.titleKey, {Key? key, this.icon, this.btnCallback})
       : super(key: key);
 
   @override
@@ -45,7 +45,7 @@ class TaskButton extends StatelessWidget {
             Container(
               height: 45,
               alignment: Alignment.topCenter,
-              child: Text(AppTranslations.of(context).text(titleKey),
+              child: Text(AppTranslations.of(context)!.text(titleKey!),
                   textAlign: TextAlign.center,
                   style: languageModel.isEng
                       ? TextStyle(

lib/pages/widgets/title_with_add_button.dart

@@ -6,11 +6,11 @@ import 'package:flutter/material.dart';
 import 'callbacks.dart';
 
 class TitleWithAddButton extends StatelessWidget {
-  final IconData iconData;
+  final IconData? iconData;
-  final String titleKey;
+  final String? titleKey;
-  final OnTap onTap;
+  final OnTap? onTap;
 
-  const TitleWithAddButton({Key key, this.iconData, this.titleKey, this.onTap})
+  const TitleWithAddButton({Key? key, this.iconData, this.titleKey, this.onTap})
       : super(key: key);
 
   @override
@@ -28,7 +28,7 @@ class TitleWithAddButton extends StatelessWidget {
             ),
             LocalText(
               context,
-              titleKey,
+              titleKey!,
               color: Colors.black54,
               fontSize: 20,
             )
@@ -40,7 +40,7 @@ class TitleWithAddButton extends StatelessWidget {
             : Padding(
                 padding: const EdgeInsets.only(right: 0),
                 child: IconButton(
-                    onPressed: () => onTap(),
+                    onPressed: () => onTap!(),
                     icon: Icon(
                       Icons.add_circle,
                       color: primaryColor,

pubspec.yaml

@@ -14,7 +14,7 @@ dependencies:
 
   cupertino_icons: ^1.0.3
   firebase_core: ^1.5.0
-  cloud_firestore: ^2.5.0
+  cloud_firestore: ^2.5.2
   firebase_storage: ^10.0.2
   firebase_auth: "^3.0.2"
   # firebase_messaging: ^6.0.15