Получение информации о пользователе, разные исправления

lib/purchase_success.dart

@@ -8,21 +8,22 @@ import 'purchase.dart';
 /// Экран проведения покупки.
 class PurchaseSuccessScreen extends StatefulWidget {
 
-  String val = '';
+  PurchaseSuccessScreen(this.val, this.name);
+  String val;
+  String name;
 
-  PurchaseSuccessScreen(String val) {
-    this.val = val;
-  }
-
-  @override State createState() => new PurchaseSuccessScreenState(val);
+  @override State createState() => new PurchaseSuccessScreenState(val, name);
 }
 
-class PurchaseSuccessScreenState<T> extends PurchaseScreenState<T> {
+class PurchaseSuccessScreenState<T> extends BaseState<PurchaseSuccessScreen> {
 
-  String val = '';
+  PurchaseSuccessScreenState(this.sum, this.username);
 
-  PurchaseSuccessScreenState(String val) {
-    this.val = val;
+  String sum;
+  String username;
+
+  @overide getMenuButtons(BuildContext context) {
+    return <Widget>[getFaqButton(), getLogoutButton()];
   }
 
   @override String getTitle() {
@@ -31,7 +32,7 @@ class PurchaseSuccessScreenState<T> extends PurchaseScreenState<T> {
 
   @override Widget getScreenContent() {
     return new Column(children: <Widget>[
-      getValueWithTitle('Покупатель', 'Знаменитый Рокер Паук'),
+      getValueWithTitle('Покупатель', username),
       getSuccessMessage(),
       new Expanded(child: new Center()),
       buildButton(new EdgeInsets.only(bottom: 74.0, left: buttonVerticalMargin, right: buttonVerticalMargin), buildRaisedButton(context, 'СКАНИРОВАТЬ', () => startScanner(context)))
@@ -41,7 +42,7 @@ class PurchaseSuccessScreenState<T> extends PurchaseScreenState<T> {
   getSuccessMessage() {
   	return new Row(children: <Widget>[new Expanded(child: new Container(margin: new EdgeInsets.only(top: 20.0), height: 64.0,
       decoration: new BoxDecoration(color: greenBackground),
-      child: new Center(child: new Text('Покупка на сумму ${val} руб. проведена', textAlign: TextAlign.center,
+      child: new Center(child: new Text('Покупка на сумму ${sum} руб. проведена', textAlign: TextAlign.center,
         style: new TextStyle(fontWeight: FontWeight.bold, color: tokenActiveTextColor)))))]);
   }