cleanup code

lib/data/provider/carton_data_provider.dart

@@ -35,7 +35,7 @@ class CartonDataProvider {
   }
 
   Future<List<Carton>> searchCarton(String term) async {
-    if (term == null || term == '') return [];
+    if (term == '') return [];
 
     // var bytes = utf8.encode(term);
     // var base64Str = base64.encode(bytes);

lib/data/provider/delivery_address_data_provider.dart

@@ -1,4 +1,3 @@
-import 'package:fcs/domain/entities/fcs_shipment.dart';
 import 'package:fcs/domain/vo/delivery_address.dart';
 import 'package:fcs/helpers/api_helper.dart';
 import 'package:fcs/helpers/firebase_helper.dart';

lib/data/provider/messaging_fcm.dart

@@ -59,7 +59,6 @@ class MessagingFCM {
   }
 
   _onNotify(Map<String, dynamic> message, OnNotify onNotify) {
-    var data = message['data'] ?? message;
     onNotify(Map<String, dynamic>.from(message));
   }
 

lib/data/provider/package_data_provider.dart

@@ -57,7 +57,7 @@ class PackageDataProvider {
   }
 
   Future<List<Package>?> ftsSearchPackage(String term) async {
-    if (term == null || term == '') return [];
+    if (term == '') return [];
 
     var bytes = utf8.encode(term);
     var base64Str = base64.encode(bytes);
@@ -86,8 +86,7 @@ class PackageDataProvider {
   }
 
   Future<List<Package>> searchPackage(String term) async {
-    if (term == null || term == '') return [];
-
+    if (term == '') return [];
     List<Package> packages = [];
 
     try {

lib/data/provider/pickup_data_provider.dart

@@ -18,7 +18,7 @@ class PickupDataProvider {
   }
 
   Future<List<Pickup>> searchPickup(String term) async {
-    if (term == null || term == '') return [];
+    if (term == '') return [];
 
     List<Pickup> pickups = [];
 

lib/data/provider/rate_data_provider.dart

@@ -86,10 +86,10 @@ class RateDataProvider {
     }
   }
 
-  late StreamSubscription<Rate> rateListener;
-  late StreamSubscription<List<CargoType>> cargoListener;
-  late StreamSubscription<List<CargoType>> customListener;
-  late StreamSubscription<List<DiscountByWeight>> discountListener;
+  late StreamSubscription<Rate>? rateListener;
+  late StreamSubscription<List<CargoType>>? cargoListener;
+  late StreamSubscription<List<CargoType>>? customListener;
+  late StreamSubscription<List<DiscountByWeight>>? discountListener;
   Stream<Rate> rate() {
     Future<void> _start() async {
       rateListener = _rateStream().listen((rate) {
@@ -115,18 +115,10 @@ class RateDataProvider {
     }
 
     void _stop() {
-      if (rateListener != null) {
-        rateListener.cancel();
-      }
-      if (cargoListener != null) {
-        cargoListener.cancel();
-      }
-      if (customListener != null) {
-        customListener.cancel();
-      }
-      if (discountListener != null) {
-        discountListener.cancel();
-      }
+      rateListener?.cancel();
+      cargoListener?.cancel();
+      customListener?.cancel();
+      discountListener?.cancel();
     }
 
     controller = StreamController<Rate>(

lib/data/provider/user_data_provider.dart

@@ -53,7 +53,7 @@ class UserDataProvider {
   }
 
   Future<List<User>> searchUser(String term) async {
-    if (term == null || term == '') return [];
+    if (term == '') return [];
 
     var bytes = utf8.encode(term);
     var base64Str = base64.encode(bytes);