small fix

lib/screens/purchase.dart

@@ -52,6 +52,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
   Map user;
   String card = '';
   String flavor = '';
+  String loyalityType = '';
   String loyalty = '';
   String bonus = '';
   bool dataLoaded = false;
@@ -75,7 +76,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
 
     widgets.add(getInputField()); // Нельзя добавить еще одно поле таким же способом
 
-    if (this.flavor != 'autobonus') {
+    if (this.loyalityType == 'bonus') {
       widgets.add(getBonusInputField());
     }
 
@@ -195,9 +196,11 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
       getLoyaltyRequest(url, helper).then((response) {
         print(response);
         this.dataLoaded = true;
+        Map loyality = JSON.decode(response.body);
         setState(() {
           this.flavor = flavor;
-          setBonuses(JSON.decode(response.body), showBonus );
+          this.loyalityType = loyality['type'];
+          setBonuses(loyality, showBonus);
         });
       }).catchError((error) {
         print(error.toString());
@@ -355,7 +358,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
   }
 
   void setBonuses(Map bonuses, bool showBonus) {
-    print('kifio ' + bonuses['type']);
+    print('kifio ' + this.loyalityType);
     if (bonuses['type'] == 'amount') {
       this.loyalty = '${user['discount']}%';
     } else {
@@ -364,7 +367,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
       this.loyalty = '${loyaltyVal.toStringAsFixed(0)}%';
     }
 
-    if (showBonus && (bonuses['type'] == 'bonus')) {
+    if (showBonus && (this.loyalityType == 'bonus')) {
       this.bonus = '${user['bonus']}';
     }
     print('kifio ' + this.loyalty);