add shipments

lib/data/provider/carton_data_provider.dart

@@ -0,0 +1,28 @@
+import 'dart:async';
+
+import 'package:fcs/domain/entities/carton.dart';
+import 'package:fcs/helpers/api_helper.dart';
+import 'package:fcs/helpers/firebase_helper.dart';
+import 'package:logging/logging.dart';
+
+class CartonDataProvider {
+  final log = Logger('CartonDataProvider');
+
+  static final CartonDataProvider instance = CartonDataProvider._();
+  CartonDataProvider._();
+
+  Future<void> createCarton(Carton carton) async {
+    return await requestAPI("/cartons", "POST",
+        payload: carton.toMap(), token: await getToken());
+  }
+
+  Future<void> updateCarton(Carton carton) async {
+    return await requestAPI("/cartons", "PUT",
+        payload: carton.toMap(), token: await getToken());
+  }
+
+  Future<void> deleteCarton(Carton carton) async {
+    return await requestAPI("/cartons", "DELETE",
+        payload: carton.toMap(), token: await getToken());
+  }
+}