add paginator

lib/data/provider/shipment_data_provider.dart

@@ -0,0 +1,43 @@
+import 'dart:async';
+
+import 'package:fcs/domain/entities/shipment.dart';
+import 'package:fcs/helpers/api_helper.dart';
+import 'package:fcs/helpers/firebase_helper.dart';
+import 'package:logging/logging.dart';
+
+class ShipmentDataProvider {
+  final log = Logger('ShipmentDataProvider');
+
+  static final ShipmentDataProvider instance = ShipmentDataProvider._();
+  ShipmentDataProvider._();
+
+  Future<void> createShipment(Shipment shipment) async {
+    return await requestAPI("/shipments", "POST",
+        payload: shipment.toMap(), token: await getToken());
+  }
+
+  Future<void> updateShipment(Shipment shipment) async {
+    return await requestAPI("/shipments", "PUT",
+        payload: shipment.toMap(), token: await getToken());
+  }
+
+  Future<void> cancelShipment(Shipment shipment) async {
+    return await requestAPI("/shipment_cancel", "PUT",
+        payload: shipment.toMap(), token: await getToken());
+  }
+
+  Future<void> confirmShipment(Shipment shipment) async {
+    return await requestAPI("/shipment_confirm", "PUT",
+        payload: shipment.toMap(), token: await getToken());
+  }
+
+  Future<void> pickupShipment(Shipment shipment) async {
+    return await requestAPI("/shipment_pickup", "PUT",
+        payload: shipment.toMap(), token: await getToken());
+  }
+
+  Future<void> receiveShipment(Shipment shipment) async {
+    return await requestAPI("/shipment_receive", "PUT",
+        payload: shipment.toMap(), token: await getToken());
+  }
+}