update rate

lib/pages/rates/discount_by_weight_editor.dart

@@ -1,15 +1,18 @@
 import 'package:fcs/domain/entities/discount.dart';
+import 'package:fcs/domain/entities/discount_by_weight.dart';
 import 'package:fcs/helpers/theme.dart';
 import 'package:fcs/localization/app_translations.dart';
 import 'package:fcs/pages/main/util.dart';
+import 'package:fcs/pages/rates/model/shipment_rate_model.dart';
 import 'package:fcs/pages/widgets/input_text.dart';
 import 'package:fcs/pages/widgets/progress.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+import 'package:provider/provider.dart';
 
 class DiscountByWeightEditor extends StatefulWidget {
-  final Discount discount;
+  final DiscountByWeight discount;
   DiscountByWeightEditor({this.discount});
 
   @override
@@ -18,10 +21,11 @@ class DiscountByWeightEditor extends StatefulWidget {
 
 class _DiscountByWeightEditorState extends State<DiscountByWeightEditor> {
   TextEditingController _weightController = new TextEditingController();
-  TextEditingController _rateController = new TextEditingController();
+  TextEditingController _discountController = new TextEditingController();
 
   bool _isLoading = false;
-  Discount _discount = new Discount();
+  DiscountByWeight _discount = new DiscountByWeight();
+  bool _isNew = false;
 
   @override
   void initState() {
@@ -29,7 +33,9 @@ class _DiscountByWeightEditorState extends State<DiscountByWeightEditor> {
     if (widget.discount != null) {
       _discount = widget.discount;
       _weightController.text = _discount.weight.toString();
-      _rateController.text = _discount.discountRate.toString();
+      _discountController.text = _discount.discount.toString();
+    } else {
+      _isNew = true;
     }
   }
 
@@ -47,7 +53,7 @@ class _DiscountByWeightEditorState extends State<DiscountByWeightEditor> {
     final discountRateBox = InputText(
         labelTextKey: 'rate.discount.rate',
         iconData: Icons.attach_money,
-        controller: _rateController);
+        controller: _discountController);
 
     return LocalProgress(
       inAsyncCall: _isLoading,
@@ -60,6 +66,12 @@ class _DiscountByWeightEditorState extends State<DiscountByWeightEditor> {
           ),
           backgroundColor: primaryColor,
           title: Text(AppTranslations.of(context).text("discount.new")),
+          actions: [
+            IconButton(
+              icon: Icon(Icons.delete),
+              onPressed: _delete,
+            )
+          ],
         ),
         body: Container(
           padding: EdgeInsets.all(18),
@@ -74,9 +86,8 @@ class _DiscountByWeightEditorState extends State<DiscountByWeightEditor> {
                   ],
                 ),
               ),
-              widget.discount == null
-                  ? fcsButton(context, "Create", callack: () {})
-                  : fcsButton(context, "Save", callack: () {}),
+              fcsButton(context, getLocalString(context, "btn.save"),
+                  callack: _save),
               SizedBox(height: 10)
             ],
           ),
@@ -84,4 +95,53 @@ class _DiscountByWeightEditorState extends State<DiscountByWeightEditor> {
       ),
     );
   }
+
+  _save() async {
+    setState(() {
+      _isLoading = true;
+    });
+    try {
+      var shipmentRateModel =
+          Provider.of<ShipmentRateModel>(context, listen: false);
+      DiscountByWeight _discount = DiscountByWeight(
+          weight: double.parse(_weightController.text),
+          discount: double.parse(_discountController.text));
+      if (_isNew) {
+        await shipmentRateModel.addDiscountByWeight(_discount);
+      } else {
+        _discount.id = widget.discount.id;
+        await shipmentRateModel.updateDiscountByWeight(_discount);
+      }
+      Navigator.pop(context);
+    } catch (e) {
+      showMsgDialog(context, "Error", e.toString());
+    } finally {
+      setState(() {
+        _isLoading = false;
+      });
+    }
+  }
+
+  _delete() {
+    showConfirmDialog(context, "rate.discount_by_weight.edit.delete.confirm",
+        _deleteDiscountByWeight);
+  }
+
+  _deleteDiscountByWeight() async {
+    setState(() {
+      _isLoading = true;
+    });
+    try {
+      var shipmentRateModel =
+          Provider.of<ShipmentRateModel>(context, listen: false);
+      await shipmentRateModel.deleteDiscountByWeight(widget.discount.id);
+      Navigator.pop(context);
+    } catch (e) {
+      showMsgDialog(context, "Error", e.toString());
+    } finally {
+      setState(() {
+        _isLoading = false;
+      });
+    }
+  }
 }