списание бонусов при покупке(часть)

lib/screens/purchase.dart

@@ -31,6 +31,8 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
   /// (удаляет запрещенные символы до их отображаения).
   TextEditingController controller = new TextEditingController();
 
+  TextEditingController bonusController = new TextEditingController();
+
   PurchaseScreenState(SqliteHelper helper, String app, String userString, String card) {
     this.user = JSON.decode(userString);
     this.card = card;
@@ -62,13 +64,19 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
     ));
     widgets.add(getValueWithDescription(StringsLocalization.card(), card));
 
+    widgets.add(getValueWithDescription(StringsLocalization.reward(), loyalty));
+
     if (bonus.length > 0) {
       widgets.add(getValueWithDescription(StringsLocalization.bonus(), bonus));
     }
 
-    widgets.add(getValueWithDescription(StringsLocalization.reward(), loyalty));
     widgets.add(getHintLabel());
-    widgets.add(getInputField());
+
+    widgets.add(getInputField()); // Нельзя добавить еще одно поле таким же способом
+
+    widgets.add(getBonusInputField());
+
+
     widgets.add(wrapButton(getScreenMargins(36.0), getCompleteButton()));
     widgets.add(wrapButton(
         getScreenMargins(24.0),
@@ -84,6 +92,47 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
     ]);
   }
 
+  getBonusInputField() {
+    return new Column(
+      children: <Widget>[
+        new Container(
+          margin: new EdgeInsets.only(
+            left: verticalMargin,
+            right: verticalMargin,
+            top: verticalMargin
+          ),
+          padding: getInputFieldContainerPadding(),
+          decoration: getInputFieldContainerDecoration(),
+          child: new TextField(
+            keyboardType: TextInputType.number,
+            decoration: new InputDecoration.collapsed(
+            hintText: StringsLocalization.bonusHint(),
+            hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)),
+            controller: bonusController,
+            onSubmitted: (String text) {
+              setState(() {
+                bonusController.text = text;
+              });
+            },
+            textAlign: TextAlign.center,
+            autofocus: true,
+          )
+        ),
+        new Container(
+          margin: new EdgeInsets.only(
+            top: 5.0
+          ),
+          child: new Text(
+            StringsLocalization.bonusExplanation(),
+            textAlign: TextAlign.center,
+            overflow: TextOverflow.ellipsis,
+            style: new TextStyle(color: greyTextColor, fontSize: 11.0),
+          )
+        )
+      ],
+    );
+  }
+
   getScreenMargins(double top) {
     double side = 42.0;
     return new EdgeInsets.only(top: top, left: side, right: side);
@@ -118,6 +167,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
 
   @override
   getTextWidget() {
+    // ?? TODO переделать, т.к. позволяет иметь только одно поле ввода на странице
     return new TextField(
       keyboardType: TextInputType.number,
       decoration: new InputDecoration.collapsed(
@@ -195,7 +245,9 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
           child: new AlertDialog(
               title: new Text(StringsLocalization.confirmation()),
               content:
-              new Text(StringsLocalization.confirmPurchase(val, currency)),
+              new Text(
+                StringsLocalization.confirmPurchase(val, currency)
+              ),
               actions: <Widget>[
                 new FlatButton(
                   child: new Text(StringsLocalization.no()),
@@ -213,6 +265,24 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
     });
   }
 
+  apiErrorAlert(String errorText) {
+    showDialog(
+      context: context,
+      child: new AlertDialog(
+        //title: new Text(StringsLocalization.()),
+        content: new Text(errorText),
+        actions: <Widget>[
+          new FlatButton(
+            child: new Text('Ok'),
+            onPressed: () {
+              Navigator.of(context).pop();
+            },
+          )
+        ]
+      )
+    );
+  }
+
   purchase(String sumTotal) async {
     if (await platform.invokeMethod('isOnline')) {
       if (!purchaseInProgress) {
@@ -229,17 +299,28 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
           'sum_total': sumTotal
         };
 
+        if (bonusController.text.length > 0) {
+          body['bonus_payment'] = bonusController.text;
+        }
+
+        print(body['bonus_payment']);
+
         var purchaseResponse;
+        Map purchase;
 
         try {
           purchaseResponse = await getPurchaseRequest(user['purchases_url'], body, token);
-          print(purchaseResponse.body);
+          purchase = JSON.decode(purchaseResponse.body);
+          if (purchase['errors'] is List && purchase['errors'].length > 0) {
+            print(purchase['errors'][0]);
+            //Navigator.of(context).pop();
+            apiErrorAlert(purchase['errors'][0]);
+          }
         } catch(error) {
           purchaseInProgress = false;
           print(error.toString());
-        }
 
-        Map purchase = JSON.decode(purchaseResponse.body);
+        }
 
         Navigator.of(context).pop();