add cartonsize api

lib/pages/carton_size/model/carton_size_model.dart

@@ -1,7 +1,9 @@
 import 'dart:async';
 
 import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:fcs/domain/constants.dart';
 import 'package:fcs/domain/entities/carton_size.dart';
+import 'package:fcs/helpers/firebase_helper.dart';
 import 'package:fcs/pages/main/model/base_model.dart';
 import 'package:logging/logging.dart';
 
@@ -20,26 +22,49 @@ class CartonSizeModel extends BaseModel {
 
   void initUser(user) {
     super.initUser(user);
-    cartonSizes = [
-      CartonSize(
-          id: "1", name: "FCS Small Box", length: 16, width: 12, height: 12),
-      CartonSize(
-          id: "2", name: "FCS Medium Box", length: 22, width: 16, height: 15),
-      CartonSize(
-          id: "3", name: "FCS Large Box", length: 28, width: 15, height: 16)
-    ];
+    _loadCartonSizes();
+  }
+
+  Future<void> _loadCartonSizes() async {
+    try {
+      if (listener != null) listener.cancel();
+
+      listener = Firestore.instance
+          .collection(
+              "/$config_collection/$setting_doc_id/$carton_sizes_collection")
+          .snapshots()
+          .listen((QuerySnapshot snapshot) {
+        cartonSizes.clear();
+        cartonSizes = snapshot.documents.map((documentSnapshot) {
+          var c = CartonSize.fromMap(
+              documentSnapshot.data, documentSnapshot.documentID);
+          return c;
+        }).toList();
+        notifyListeners();
+      });
+    } catch (e) {
+      log.warning("Error!! $e");
+    }
   }
 
   @override
   logout() async {
     if (listener != null) await listener.cancel();
-
     cartonSizes = [];
   }
 
-  Future<void> addCartonSize(CartonSize cartonSize) async {}
+  Future<void> addCartonSize(CartonSize cartonSize) async {
+    await request("/carton_sizes", "POST",
+        payload: cartonSize.toMap(), token: await getToken());
+  }
 
-  Future<void> updateCartonSize(CartonSize cartonSize) async {}
+  Future<void> updateCartonSize(CartonSize cartonSize) async {
+    await request("/carton_sizes", "PUT",
+        payload: cartonSize.toMap(), token: await getToken());
+  }
 
-  Future<void> deleteCartonSize(String id) async {}
+  Future<void> deleteCartonSize(String id) async {
+    await request("/carton_sizes", "DELETE",
+        payload: {"id": id}, token: await getToken());
+  }
 }