update carton filter and merge api for shipment

lib/pages/carton/model/carton_model.dart

@@ -17,6 +17,8 @@ import 'package:path/path.dart' as Path;
 class CartonModel extends BaseModel {
   final log = Logger('CartonModel');
 
+  var defaultShipment =FcsShipment(shipmentNumber: "All shipments", id: all);
+
   PaginatorListener<Carton>? cartonsByFilter;
   PaginatorListener<Carton>? getBoxes;
 
@@ -56,7 +58,8 @@ class CartonModel extends BaseModel {
     _loadPaginationCartons();
   }
 
-  filterCarton(User? consignee, User? sender, String? status) async {
+  filterCarton(FcsShipment? fcsShipment, User? consignee, User? sender,
+      String? status) async {
     filterByStatus = status;
 
     if (status == all_status) {
@@ -77,6 +80,12 @@ class CartonModel extends BaseModel {
       filterBySender = sender;
     }
 
+    if (fcsShipment?.id == all) {
+      shipment = null;
+    } else {
+      shipment = fcsShipment;
+    }
+
     loadPaginationCartons();
     notifyListeners();
   }

lib/pages/carton/model/shipment_selection_model.dart

@@ -0,0 +1,75 @@
+import 'dart:async';
+
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:fcs/domain/entities/fcs_shipment.dart';
+import 'package:logging/logging.dart';
+
+import '../../../domain/constants.dart';
+import '../../main/model/base_model.dart';
+
+class ShipmentSelectionModel extends BaseModel {
+  final log = Logger("ShipmentSelectionModel");
+
+  List<FcsShipment> _shipments = [];
+
+  List<FcsShipment> get getShipments {
+    var list = new List<FcsShipment>.from(_shipments);
+    return list
+      ..insert(0, FcsShipment(id: all, shipmentNumber: "All shipments"));
+  }
+
+  bool isLoading = false;
+  DocumentSnapshot? _lastDocument;
+  bool ended = false;
+
+  Future<void> refresh() async {
+    _shipments.clear();
+    _lastDocument = null;
+    ended = false;
+    await loadMoreData();
+    notifyListeners();
+  }
+
+  Future<void> loadMoreData() async {
+    int rowPerPage = 20;
+
+    try {
+      isLoading = true;
+      String path = "/$fcs_shipment_collection";
+      Query query = FirebaseFirestore.instance
+          .collection(path)
+          .where("status", whereIn: [
+            fcs_shipment_processing_status,
+            fcs_shipment_shipped_status,
+            fcs_shipment_arrived_status,
+            fcs_shipment_invoiced_status
+          ])
+          .where("is_deleted", isEqualTo: false)
+          .orderBy("update_time", descending: true);
+
+      if (_lastDocument != null) {
+        query = query.startAfterDocument(_lastDocument!);
+      }
+
+      QuerySnapshot querySnap = await query.limit(rowPerPage).get();
+
+      if (querySnap.docs.isEmpty) return;
+      _lastDocument = querySnap.docs[querySnap.docs.length - 1];
+
+      List<FcsShipment> list = querySnap.docs.map((documentSnapshot) {
+        var p = FcsShipment.fromMap(
+            documentSnapshot.data() as Map<String, dynamic>,
+            documentSnapshot.id);
+        return p;
+      }).toList();
+
+      _shipments.addAll(list);
+      if (list.length < rowPerPage) ended = true;
+      notifyListeners();
+    } catch (e) {
+      log.warning("error:$e");
+    } finally {
+      isLoading = false;
+    }
+  }
+}