13450 merge 12267_new_flow and update to new flutter version

android/app/build.gradle

@@ -211,5 +211,6 @@ dependencies {
 }
 
 repositories {
+  google()
   mavenCentral()
 }

android/app/src/main/java/com/dinect/checker/MainActivity.java

@@ -38,6 +38,7 @@ public class MainActivity extends FlutterActivity {
 
     private MethodChannel mChannel;
     private Map mScannerArgs;
+    private Result scannerResult;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -59,6 +60,7 @@ public class MainActivity extends FlutterActivity {
                 result.success(BuildConfig.currency);
                 break;
             case "startScanner":
+                scannerResult = result;
                 startScannerActivity(call);
                 break;
             case "isOnline":
@@ -169,7 +171,7 @@ public class MainActivity extends FlutterActivity {
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         if (requestCode == START_SCANNER_REQUEST_CODE) {
             if (resultCode == RESULT_CANCELED) {
-                finish();
+              scannerResult.error("Scanning is cancelled", null, null);
             } else if (resultCode == RESULT_OK) {
                 if (data != null && data.getExtras() != null) {
                     String user = data.getExtras().getString("user", null);
@@ -178,7 +180,9 @@ public class MainActivity extends FlutterActivity {
                         ArrayList<String> args = new ArrayList<>(2);
                         args.add(user);
                         args.add(card);
-                        mChannel.invokeMethod("purchase", args);
+                        if(scannerResult != null) {
+                            scannerResult.success(args);
+                        }
                     } else {
                         String menuItem = data.getExtras().getString("item", null);
                         if (menuItem != null) {

android/build.gradle

@@ -13,8 +13,8 @@ buildscript {
 
 allprojects {
   repositories {
-    jcenter()
     google()
+    jcenter()
   }
 }
 

assets/values-en/strings.xml

@@ -162,4 +162,7 @@ You bonus balance will be changed and you will have %s bonus points.</string>
   <string name="return_confirmation">Return confirmed</string>
   <string name="return_confirmation_content">Purchase, which cost %s on %s is returned.</string>
   <string name="points">Points</string>
+  <string name="cancel">Cancel</string>
+  <string name="purchase_cancellation">Are you sure you want to cancel this purchase?</string>
+  <string name="purchase_details">Total amount: %s %s, with discount of %s %s (%s%%)</string>
 </resources>

assets/values-es/strings.xml

@@ -158,4 +158,7 @@ Se cambiará su saldo de bonificación y tendrá %s puntos de bonificación.</st
   <string name="return_confirmation">Regreso confirmado</string>
   <string name="return_confirmation_content">Compra, cuyo costo %s en %s se devuelve.</string>
   <string name="points">Puntos</string>
+  <string name="cancel">Cancelar</string>
+  <string name="purchase_cancellation">¿Seguro que quieres cancelar esta compra?</string>
+  <string name="purchase_details">Cantidad total: %s %s, con descuento de %s %s (%s%%)</string>
 </resources>

assets/values-ru/strings.xml

@@ -161,4 +161,7 @@
   <string name="return_confirmation">Возврат подтвержден</string>
   <string name="return_confirmation_content">Покупка на сумму %s от %s возвращена.</string>
   <string name="points">Баллы</string>
+  <string name="cancel">Отмена</string>
+  <string name="purchase_cancellation">Вы уверены что хотите отменить покупку?</string>
+  <string name="purchase_details">Итого покупка: %s %s, Со скидкой %s %s (%s%%)</string>
 </resources>

assets/values-ua/strings.xml

@@ -163,4 +163,7 @@
   <string name="return_confirmation">Повернення підтверджено</string>
   <string name="return_confirmation_content">Повертається придбання, вартість якого %s на %s.</string>
   <string name="points">Бонусні бали</string>
+  <string name="cancel">Скасувати</string>
+  <string name="purchase_cancellation">Дійсно скасувати цю покупку?</string>
+  <string name="purchase_details">Загальна кількість: %s %s, зі знижкою %s %s (%s%%)</string>
 </resources>

ios/Runner/AppDelegate.m

@@ -12,9 +12,7 @@
 
     FlutterMethodChannel* platformChannel = [FlutterMethodChannel
                                             methodChannelWithName:@"com.dinect.checker/instance_id"
-                                            binaryMessenger:controller];
+                                            binaryMessenger:controller.binaryMessenger];
-
-    __weak FlutterMethodChannel* weekPlatformChannel = platformChannel;
 
     NSString *bundleIdentifier = [[NSBundle mainBundle] bundleIdentifier];
 
@@ -116,7 +114,7 @@
             result(buildSettings[@"currency"]);
         } else if ([@"startScanner" isEqualToString:call.method]) {
             ScannerViewController *modalViewController = [[ScannerViewController alloc] initWithStrings:call.arguments];
-            modalViewController.platformChannel = weekPlatformChannel;
+            modalViewController.platformChannel = platformChannel;
             [controller presentViewController:modalViewController animated:YES completion:nil];
         } else if ([@"isOnline" isEqualToString:call.method]) {
             result(@YES);

ios/Runner/ScannerViewController.swift

@@ -272,7 +272,7 @@ import ZXingObjC
             } else {
                 print("Result is not nil (ios code)");
                 self.dismiss(animated: true) {
-                    self.platformChannel?.invokeMethod("purchase", arguments: [result, str])
+                    self.platformChannel?.invokeMethod("scanSuccess", arguments: [result!, str])
                 }
             }
         })

lib/screens/finish_registration.dart

@@ -1,5 +1,4 @@
 import 'dart:convert';
-import 'dart:async';
 
 import 'package:checker/base/base_screen.dart';
 import 'package:checker/base/base_state.dart';

lib/screens/purchase.dart

@@ -1,52 +1,59 @@
-import 'package:checker/base/base_screen.dart';
+import 'dart:async';
-import 'package:checker/db.dart';
-import 'package:checker/screens/return.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'dart:convert';
 import 'dart:core';
-import 'dart:async';
 
-import 'package:checker/resources.dart';
+import 'package:checker/base/base_screen.dart';
-import 'package:checker/strings.dart';
+import 'package:checker/base/base_state.dart';
 import 'package:checker/common.dart';
 import 'package:checker/consts.dart';
+import 'package:checker/db.dart';
 import 'package:checker/network.dart';
-import 'package:checker/base/base_state.dart';
+import 'package:checker/resources.dart';
 import 'package:checker/screens/purchase_success.dart';
+import 'package:checker/screens/purchase_sum.dart';
+import 'package:checker/screens/return.dart';
+import 'package:checker/strings.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+typedef PurchaseResponseCallback = void Function(Map, String, String);
 
 /// Экран проведения покупки.
 class PurchaseScreen extends BaseScreen {
-
+  PurchaseScreen(helper, app, this.user, this.card, this.sum)
-  PurchaseScreen(helper, app, this.user, this.card) : super(helper, app);
+      : super(helper, app);
 
   final String user;
   final String card;
+  final String sum;
 
   @override
-  State createState() => new PurchaseScreenState<PurchaseScreen>(helper, app, user, card);
+  State createState() =>
+      new PurchaseScreenState<PurchaseScreen>(helper, app, user, card);
 }
 
 class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
   /// Объект, помогающий вручную изменять введенный пользователем текст.
   /// Используется для форматирования введенных пользователем данных
   /// (удаляет запрещенные символы до их отображаения).
-  TextEditingController controller = new TextEditingController();
+  TextEditingController controller;
 
   TextEditingController bonusController = new TextEditingController();
 
   bool isAutomaticallyImplyLeading() => false;
 
-  PurchaseScreenState(SqliteHelper helper, String app, String userString, String card) : super(helper, app) {
+  PurchaseScreenState(
+      SqliteHelper helper, String app, String userString, String card)
+      : super(helper, app) {
     this.user = json.decode(userString);
     this.card = card;
   }
 
   @override
   void initState() {
+    controller = new TextEditingController(text: widget.sum ?? "");
     loading = true;
     requestAsyncData(user);
-    loading = false;
     buildFocusNode();
     scrollController = new ScrollController();
     super.initState();
@@ -70,21 +77,22 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
   @override
   Widget getScreenContent() {
     List<Widget> widgetList = [];
-    widgetList.add(getValueWithDescription(
+    widgetList.add(getValueWithDescription(StringsLocalization.buyer(),
-      StringsLocalization.buyer(),
+        user['first_name'] == null ? '' : user['first_name']));
-      user['first_name'] == null ? '' : user['first_name']
-    ));
     widgetList.add(getValueWithDescription(StringsLocalization.card(), card));
 
-    if ((app != 'crypto')) {
+    if (app != 'crypto') {
-      widgetList.add(getValueWithDescription(StringsLocalization.reward(), loyalty));
+      widgetList
+          .add(getValueWithDescription(StringsLocalization.reward(), loyalty));
       if (bonus.length > 0) {
-        widgetList.add(getValueWithDescription(StringsLocalization.bonus(), bonus));
+        widgetList
+            .add(getValueWithDescription(StringsLocalization.bonus(), bonus));
       }
     }
 
     widgetList.add(getHintLabel());
-    widgetList.add(getInputField()); // Нельзя добавить еще одно поле таким же способом
+    widgetList.add(
+        getInputField()); // Нельзя добавить еще одно поле таким же способом
 
     if ((app != 'autobonus') && (app != 'crypto')) {
       if (this.loyalityType == 'bonus') {
@@ -94,16 +102,12 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
       if (this.coupons.length > 0) {
         widgetList.add(getItemTitle(StringsLocalization.selectCoupons()));
         this.coupons.forEach((couponItem) {
-          widgetList.add(getItemToggleSwitch(
+          widgetList.add(getItemToggleSwitch(couponItem['offer_name'],
-            couponItem['offer_name'],
+              couponItem['coupon_condition'], couponItem['isSet'], (val) {
-            couponItem['coupon_condition'],
-            couponItem['isSet'],
-              (val) {
             setState(() {
               couponItem['isSet'] = val;
             });
-            }
+          }));
-          ));
         });
       }
     }
@@ -112,15 +116,13 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
 
     widgetList.add(wrapButton(
         getScreenMargins(24.0),
-      getScanButton(
+        getCancelScanButton(context, StringsLocalization.cancel(),
-        context,
+            Resources.getPrimaryColor(app))));
-        StringsLocalization.scan(),
-        Resources.getPrimaryColor(app)
-      )
-    ));
 
     if (this.coupons.length == 0) {
-      widgetList.add(new Container(height: 50.0,));
+      widgetList.add(new Container(
+        height: 50.0,
+      ));
     }
 
     listView = new ListView(children: widgetList, controller: scrollController);
@@ -131,8 +133,10 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
 
   void openReturnScreen() {
     Future.delayed(const Duration(milliseconds: 200), () {
-      Route route = MaterialPageRoute<String>(builder: (BuildContext context) =>
+      Route route = MaterialPageRoute<String>(
-        ReturnScreen(helper, app, user['id'], user['bonus']), fullscreenDialog: true);
+          builder: (BuildContext context) =>
+              ReturnScreen(helper, app, user['id'], user['bonus']),
+          fullscreenDialog: true);
       Navigator.push(context, route);
     });
   }
@@ -142,8 +146,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
       keyboardType: TextInputType.number,
       decoration: new InputDecoration.collapsed(
           hintText: StringsLocalization.bonusHint(),
-        hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)
+          hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)),
-      ),
       focusNode: bonusFocusNode,
       controller: bonusController,
       onSubmitted: (String text) {
@@ -160,23 +163,18 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
             margin: new EdgeInsets.only(
                 left: verticalMargin,
                 right: verticalMargin,
-            top: verticalMargin
+                top: verticalMargin),
-          ),
             padding: getInputFieldContainerPadding(),
             decoration: getInputFieldContainerDecoration(),
-          child: bonusTextField
+            child: bonusTextField),
-        ),
         new Container(
-          margin: new EdgeInsets.only(
+            margin: new EdgeInsets.only(top: 5.0),
-            top: 5.0
-          ),
             child: new Text(
               StringsLocalization.bonusExplanation(),
               textAlign: TextAlign.center,
               overflow: TextOverflow.ellipsis,
               style: new TextStyle(color: greyTextColor, fontSize: 11.0),
-          )
+            ))
-        )
       ],
     );
   }
@@ -191,12 +189,13 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
         StringsLocalization.completePurchase(), () => onPurchaseClick());
   }
 
-  Widget getScanButton(BuildContext context, String title, Color textColor) {
+  Widget getCancelScanButton(
+      BuildContext context, String title, Color textColor) {
     return new Container(
         height: buttonHeight,
         child: new FlatButton(
             child: new Text(title, style: new TextStyle(color: textColor)),
-        onPressed: () => restartScanner()),
+            onPressed: () => restartFlow()),
         decoration: new BoxDecoration(
             border: new Border.all(
                 color: Resources.getButtonColor(app), width: 1.0),
@@ -239,10 +238,8 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
         var token = await helper.getToken();
         response = await getLoyaltyRequest(user['loyalty_url'], token);
         couponResponse = await getCouponsRequest(
-          user['coupons_url'] + '?status=ACTIVE',
+            user['coupons_url'] + '?status=ACTIVE', token);
-          token
+      } catch (error) {
-        );
-      } catch(error) {
         print(error.toString());
       }
       Map loyality = json.decode(response.body);
@@ -299,17 +296,24 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
   }
 
   onPurchaseClick() {
+    String val = _parseSum(controller.text);
+    purchase(val, false, _showPrecalculatedValues);
+  }
+
+  void _showPrecalculatedValues(Map response, String sumTotal, String token) {
     String val = _parseSum(controller.text);
     helper.getCurrency().then((currency) {
       print(currency.toString());
+      final String totalAmount = response['sum_total'];
+      final String totalDiscount = response['sum_discount'];
+      final String discount = (response['discount'] as int).toString();
+      print(response);
       showDialog(
           context: context,
           builder: (_) => new AlertDialog(
                   title: new Text(StringsLocalization.confirmation()),
-          content:
+                  content: Text(StringsLocalization.purchaseDetails(
-          new Text(
+                      totalAmount, totalDiscount, discount, currency)),
-            StringsLocalization.confirmPurchase(val, currency)
-          ),
                   actions: <Widget>[
                     new FlatButton(
                       child: new Text(StringsLocalization.no()),
@@ -321,37 +325,65 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
                       child: new Text(StringsLocalization.yes()),
                       onPressed: () {
                         Navigator.of(context).pop();
-                purchase(val);
+                        purchase(val, true, _paymentConfirmed);
                       },
                     )
                   ]));
     });
   }
 
+  void _paymentConfirmed(Map purchase, String sumTotal, String token) async {
+    var couponsResponse;
+
+    try {
+      couponsResponse = await getCouponsRequest(purchase['coupons_url'], token);
+      print(couponsResponse.body);
+    } catch (error) {
+      purchaseInProgress = false;
+      print(error.toString());
+    }
+
+    Map coupons = json.decode(couponsResponse.body);
+
+    new Future.delayed(const Duration(milliseconds: 200), () {
+      print('show purchase success!');
+      var route = new MaterialPageRoute<String>(
+          builder: (BuildContext context) => new PurchaseSuccessScreen(
+              sumTotal,
+              user['first_name'] == null ? '' : user['first_name'],
+              helper,
+              app,
+              purchase,
+              coupons['results']),
+          fullscreenDialog: true);
+      Navigator.of(context).push(route).then((token) {
+        Navigator.of(context).pop(token);
+      });
+    });
+  }
+
   apiErrorAlert(String errorText) {
     showDialog(
         context: context,
-      builder: (_) => new AlertDialog(
+        builder: (_) =>
-        content: new Text(errorText),
+            new AlertDialog(content: new Text(errorText), actions: <Widget>[
-        actions: <Widget>[
               new FlatButton(
                 child: new Text('Ok'),
                 onPressed: () {
                   Navigator.of(context).pop();
                 },
               )
-        ]
+            ]));
-      )
-    );
   }
 
-  purchase(String sumTotal) async {
+  purchase(
+      String sumTotal, bool commit, PurchaseResponseCallback callback) async {
     setState(() {
       loading = true;
     });
     if (await platform.invokeMethod('isOnline')) {
       if (!purchaseInProgress) {
-        purchaseInProgress = true;
+        purchaseInProgress = commit;
 
         String token = await helper.getToken();
         var result = await helper.getMerchantID();
@@ -367,10 +399,13 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
         var body = {
           'doc_id': result,
           'curr_iso_code': currency.toString(),
-          'commit': 'true',
           'sum_total': sumTotal,
         };
 
+        if (commit) {
+          body['commit'] = 'true';
+        }
+
         if (bonusController.text.length > 0) {
           body['bonus_payment'] = bonusController.text;
         }
@@ -383,9 +418,10 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
         Map purchase;
 
         try {
-          purchaseResponse = await getPurchaseRequest(user['purchases_url'], body, token);
+          purchaseResponse =
+              await getPurchaseRequest(user['purchases_url'], body, token);
           purchase = json.decode(purchaseResponse.body);
-        } catch(error) {
+        } catch (error) {
           purchaseInProgress = false;
           print(error.toString());
         }
@@ -398,32 +434,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
           purchaseInProgress = false;
           apiErrorAlert(errors[0]);
         } else {
-          var couponsResponse;
+          callback(purchase, sumTotal, token);
-
-          try {
-            couponsResponse = await getCouponsRequest(purchase['coupons_url'], token);
-            print(couponsResponse.body);
-          } catch(error) {
-            purchaseInProgress = false;
-            print(error.toString());
-          }
-
-          Map coupons = json.decode(couponsResponse.body);
-
-          new Future.delayed(const Duration(milliseconds: 200), () {
-            print('show purchase success!');
-            var route = new MaterialPageRoute<String>(builder: (BuildContext context) => new PurchaseSuccessScreen(
-              sumTotal,
-              user['first_name'] == null ? '' : user['first_name'],
-              helper,
-              app,
-              purchase,
-              coupons['results']
-            ), fullscreenDialog: true);
-            Navigator.of(context).push(route).then((token) {
-              Navigator.of(context).pop(token);
-            });
-          });
         }
       }
     }
@@ -432,24 +443,49 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
   void setBonuses(Map bonuses, bool showBonus) {
     print('loyalityType ' + this.loyalityType);
     if (bonuses['type'] == 'amount') {
-      this.loyalty = '${user['discount']}%';
+      setState(() => this.loyalty = '${user['discount']}%');
     } else {
       double loyaltyVal = (double.parse(bonuses['amount_to_bonus'][1]) /
-        bonuses['amount_to_bonus'][0]) * 100;
+              bonuses['amount_to_bonus'][0]) *
-      this.loyalty = '${loyaltyVal.toStringAsFixed(0)}%';
+          100;
+      setState(() => this.loyalty = '${loyaltyVal.toStringAsFixed(0)}%');
     }
 
     if (showBonus && (this.loyalityType == 'bonus')) {
-      this.bonus = '${user['bonus']}';
+      setState(() => this.bonus = '${user['bonus']}');
     }
     print('loyalty ' + this.loyalty);
     print('bonus ' + this.bonus);
   }
 
-  restartScanner() {
+  restartFlow() {
+    showDialog(
+        context: context,
+        builder: (context) => AlertDialog(
+              content: Text(StringsLocalization.cancelDialog()),
+              actions: <Widget>[
+                new FlatButton(
+                  child: new Text(StringsLocalization.no()),
+                  onPressed: () {
+                    Navigator.of(context).pop();
+                  },
+                ),
+                new FlatButton(
+                  child: new Text(StringsLocalization.yes()),
+                  onPressed: () {
+                    Navigator.of(context).pop();
                     helper.getToken().then((token) {
-      Navigator.of(context).pop(token);
+                      Navigator.pushAndRemoveUntil(
+                          context,
+                          MaterialPageRoute(
+                              builder: (context) => PurchaseSumScreen(
+                                  widget.helper, widget.app, token)),
+                          (route) => false);
                     });
+                  },
+                )
+              ],
+            ));
   }
 
   FocusNode bonusFocusNode = new FocusNode();
@@ -457,34 +493,22 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
 
   // TODO: Удалить дублирующийся код.
   void buildFocusNode() {
-
     var pos = this.coupons.length > 0 ? 150.0 : 100.0;
 
     sumFocusNode.addListener(() {
       setState(() {
-
-        if (sumFocusNode.hasFocus && bonusFocusNode.hasFocus) {
-          bonusFocusNode.unfocus();
-        }
-
         if (sumFocusNode.hasFocus) {
-          scrollController.animateTo(pos, duration: new Duration(seconds: 1), curve: Curves.ease);
+          sumFocusNode.unfocus();
         }
-
       });
     });
 
     bonusFocusNode.addListener(() {
       setState(() {
-
-        if (bonusFocusNode.hasFocus && sumFocusNode.hasFocus) {
-          sumFocusNode.unfocus();
-        }
-
         if (bonusFocusNode.hasFocus) {
-          scrollController.animateTo(pos, duration: new Duration(seconds: 1), curve: Curves.ease);
+          scrollController.animateTo(pos,
+              duration: new Duration(seconds: 1), curve: Curves.ease);
         }
-
       });
     });
   }

lib/screens/purchase_success.dart

@@ -2,6 +2,7 @@ import 'package:checker/base/base_state.dart';
 import 'package:checker/common.dart';
 import 'package:checker/consts.dart';
 import 'package:checker/db.dart';
+import 'package:checker/screens/purchase_sum.dart';
 import 'package:checker/strings.dart';
 import 'package:flutter/material.dart';
 
@@ -133,7 +134,11 @@ class PurchaseSuccessScreenState<T> extends BaseState<PurchaseSuccessScreen> {
 
   getScanButton() {
     String title = StringsLocalization.scan();
-    return buildRaisedButton(title, () => Navigator.of(context).pop(token));
+    return buildRaisedButton(title,
+        () =>  Navigator.pushAndRemoveUntil(context,
+          MaterialPageRoute(builder: (context) =>
+            PurchaseSumScreen(widget.helper, widget.app, token)),
+            (route) => false));
   }
 
 

lib/screens/purchase_sum.dart

@@ -0,0 +1,204 @@
+import 'dart:convert';
+import 'dart:core';
+
+import 'package:checker/base/base_screen.dart';
+import 'package:checker/base/base_state.dart';
+import 'package:checker/common.dart';
+import 'package:checker/consts.dart';
+import 'package:checker/db.dart';
+import 'package:checker/network.dart';
+import 'package:checker/resources.dart';
+import 'package:checker/screens/purchase.dart';
+import 'package:checker/strings.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:http/http.dart';
+
+/// Экран ввода суммы покупки
+class PurchaseSumScreen extends BaseScreen {
+  PurchaseSumScreen(helper, app, this.token) : super(helper, app);
+
+  final String token;
+
+  @override
+  State createState() =>
+      new PurchaseSumScreenState<PurchaseSumScreen>(helper, app);
+}
+
+class PurchaseSumScreenState<T> extends BaseState<PurchaseSumScreen> {
+  TextEditingController _sumController = new TextEditingController();
+
+  bool isAutomaticallyImplyLeading() => false;
+
+  PurchaseSumScreenState(SqliteHelper helper, String app) : super(helper, app);
+
+  @override
+  void initState() {
+    super.initState();
+    _subscribe();
+  }
+
+  @override
+  Widget build(BuildContext ctx) {
+    return getMainWidget();
+  }
+
+  @override
+  Widget getScreenContent() => Column(
+        children: <Widget>[
+          getHintLabel(),
+          getInputField(),
+          wrapButton(
+              _getScreenMargins(24.0),
+              getScanButton(context, StringsLocalization.scan(),
+                  Resources.getPrimaryColor(app)))
+        ],
+      );
+
+  EdgeInsets _getScreenMargins(double top) {
+    double side = 42.0;
+    return new EdgeInsets.only(top: top, left: side, right: side);
+  }
+
+  Widget getScanButton(BuildContext context, String title, Color textColor) {
+    return new Container(
+        height: buttonHeight,
+        child: new FlatButton(
+            child: new Text(title, style: new TextStyle(color: textColor)),
+            onPressed: () => _startScanner()),
+        decoration: new BoxDecoration(
+            border: new Border.all(
+                color: Resources.getButtonColor(app), width: 1.0),
+            borderRadius: new BorderRadius.all(new Radius.circular(4.0))));
+  }
+
+  void _startScanner() {
+    platform.invokeMethod('getEndpoint').then((url) {
+      platform.invokeMethod('getAppToken').then((appToken) {
+        Map<String, String> args = StringsLocalization.strings;
+        args['token'] = widget.token;
+        args['url'] = url;
+        args['appToken'] = appToken;
+        args['localeCode'] = StringsLocalization.localeCode;
+        args['color'] = Resources.getPrimaryColor(app).value.toString();
+        platform.invokeMethod('startScanner', args).then((result) {
+          _processResult(result);
+        });
+      });
+    });
+  }
+
+  @override
+  String getTitle() {
+    return StringsLocalization.sum();
+  }
+
+  @override
+  getHintString() {
+    return StringsLocalization.sum();
+  }
+
+  @override
+  getTextWidget() {
+    return new TextField(
+        keyboardType: TextInputType.number,
+        decoration: new InputDecoration.collapsed(
+            hintText: getHintString(),
+            hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)),
+        controller: _sumController,
+        onSubmitted: (String text) {
+          setState(() {
+            _sumController.text = _parseSum(text);
+          });
+        },
+        textAlign: TextAlign.center);
+  }
+
+  String _cleanupNumber(String text) {
+    String tmp = text
+        .replaceAll(' ', '')
+        .replaceAll('-', '')
+        .replaceAll(',', '.')
+        .replaceAll('..', '.');
+
+    while (tmp.indexOf('..') != -1) {
+      tmp = tmp.replaceAll('..', '.');
+    }
+    return tmp;
+  }
+
+  String _parseSum(String input) {
+    num sumTotal = 0.0;
+    String text = _cleanupNumber(input);
+
+    try {
+      sumTotal = num.parse(text);
+    } catch (exception) {
+      print(exception);
+      try {
+        int idx = text.indexOf('.');
+        String integerPart = text.substring(0, idx);
+        String fractionalPart = text.substring(idx + 1, text.length);
+        if (fractionalPart.length > 2) {
+          fractionalPart = fractionalPart.substring(0, 2);
+        }
+        return '$integerPart.$fractionalPart';
+      } catch (exception) {
+        print(exception);
+      }
+    }
+    print(sumTotal.toStringAsFixed(2));
+    return sumTotal.toStringAsFixed(2);
+  }
+
+  void _processResult(result) {
+    if (result is List) {
+      final String user = result[0] as String;
+      final String card = result[1] as String;
+      Navigator.of(context).push(new MaterialPageRoute(builder: (context) {
+        String sum = _parseSum(_sumController.text);
+        _sumController.text = "";
+        return PurchaseScreen(helper, app, user, card, sum);
+      }));
+    }
+  }
+
+  void _subscribe() async {
+    platform.setMethodCallHandler((MethodCall call) async {
+      print('Received method chanell call');
+      if (call.method == 'findUser') {
+        try {
+          Response userResponse;
+
+          switch (call.arguments[1]) {
+            case 'card':
+              userResponse =
+                  await getUserByCard(call.arguments[0], widget.token);
+              break;
+            case 'phone':
+              userResponse =
+                  await getUserByPhone(call.arguments[0], widget.token);
+              break;
+          }
+
+          if (userResponse != null) {
+            print('I have user in method handler!');
+            List<dynamic> users = json.decode(userResponse.body);
+            if (users.length > 0) {
+              return json.encode(users[0]);
+            } else {
+              throw new FlutterError("Users not found");
+            }
+          } else {
+            throw new FlutterError("Users not found");
+          }
+        } catch (error) {
+          print(error.toString());
+          throw new FlutterError("Users not found");
+        }
+      } else if (call.method == 'scanSuccess') {
+        _processResult(call.arguments);
+      }
+    });
+  }
+}

lib/screens/splash.dart

@@ -11,6 +11,7 @@ import 'package:checker/resources.dart';
 import 'package:checker/screens/faq.dart';
 import 'package:checker/screens/finish_registration.dart';
 import 'package:checker/screens/purchase.dart';
+import 'package:checker/screens/purchase_sum.dart';
 import 'package:checker/screens/registration.dart';
 import 'package:checker/screens/settings.dart';
 import 'package:checker/strings.dart';
@@ -240,23 +241,13 @@ class _SplashScreenState extends BaseState<SplashScreen> {
           : json.encode(call.arguments[0]);
         print(userString);
         String card = call.arguments[1];
-        showNextScreen(new PurchaseScreen(helper, app, userString, card));
+        showNextScreen(new PurchaseScreen(helper, app, userString, card, null));
       }
     });
 
-    platform.invokeMethod('getEndpoint').then((url) {
+    Navigator.of(context).pushReplacement(
-      platform.invokeMethod('getAppToken').then((appToken) {
+      MaterialPageRoute(builder: (context) =>
-        Map<String, String> args = StringsLocalization.strings;
+        PurchaseSumScreen(helper, app, token))
-        args['token'] = token;
+    );
-        args['url'] = url;
-        args['appToken'] = appToken;
-        args['localeCode'] = StringsLocalization.localeCode;
-        args['color'] = Resources
-          .getPrimaryColor(app)
-          .value
-          .toString();
-        platform.invokeMethod('startScanner', args);
-      });
-    });
   }
 }

lib/strings.dart

@@ -1,16 +1,18 @@
 import 'dart:async';
+
+import 'package:flutter/services.dart';
 import 'package:sprintf/sprintf.dart';
 import 'package:xml/xml.dart' as xml;
-import 'package:flutter/services.dart';
 
 class StringsLocalization {
-
   static String localeCode;
   static Map<String, String> strings = new Map<String, String>();
 
   static Future load(String l) async {
     localeCode = l;
-    await rootBundle.loadString('assets/values-$localeCode/strings.xml').then((content) {
+    await rootBundle
+        .loadString('assets/values-$localeCode/strings.xml')
+        .then((content) {
       content.replaceAll('=\"', '=\\"');
       content.replaceAll('\">', '\\">"');
       var document = xml.parse(content);
@@ -111,26 +113,46 @@ class StringsLocalization {
     return [nominative, singular, plural];
   }
 
+  static _normalizeDouble(String val) => val.substring(0, val.length - 3);
 
   static String confirmPurchase(String val, int code) {
-    String trimmedVal = val.substring(0, val.length - 3);
+    String trimmedVal = _normalizeDouble(val);
-    return sprintf(strings['confirm_purchase'], [val, declineCurrency(int.parse(trimmedVal), code)]);
+    return sprintf(strings['confirm_purchase'],
+        [val, declineCurrency(int.parse(trimmedVal), code)]);
   }
 
   static String purchaseCompleted(String val, int code) {
-    String trimmedVal = val.substring(0, val.length - 3);
+    String trimmedVal = _normalizeDouble(val);
-    return sprintf(strings['purchase_complite'], [val, declineCurrency(int.parse(trimmedVal), code)]);
+    return sprintf(strings['purchase_complite'],
+        [val, declineCurrency(int.parse(trimmedVal), code)]);
   }
+
   static String paymentCompleted(String val, int code) {
     String trimmedVal = val.substring(0, val.length - 3);
-    return sprintf(strings['payment_complite'], [val, declineCurrency(int.parse(trimmedVal), code)]);
+    return sprintf(strings['payment_complite'],
+        [val, declineCurrency(int.parse(trimmedVal), code)]);
   }
+
   static String returnConfirmation(String sum, String date, int points) =>
-    sprintf(strings['return_purchase_content'], [sum, date, points.toString()]);
+      sprintf(
+          strings['return_purchase_content'], [sum, date, points.toString()]);
 
   static String returnConfirmedContent(String sum, String date) =>
       sprintf(strings['return_confirmation_content'], [sum, date]);
 
+  static String purchaseDetails(
+      String total, String discountTotal, String discount, int code) {
+    final String normTotal = _normalizeDouble(total);
+    final String normDiscountTotal = _normalizeDouble(discountTotal);
+    return sprintf(strings['purchase_details'], [
+      total,
+      declineCurrency(int.parse(normTotal), code),
+      discountTotal,
+      declineCurrency(int.parse(normDiscountTotal), code),
+      discount
+    ]);
+  }
+
   static String registration() => strings['registration'];
   static String usage() => strings['usage'];
   static String support() => strings['support'];
@@ -142,7 +164,8 @@ class StringsLocalization {
   static String askChangeStore() => strings['ask_change_store'];
   static String yes() => strings['yes'];
   static String no() => strings['no'];
-  static String requestSentWaitActivation() => strings['request_sent_wait_activ'];
+  static String requestSentWaitActivation() =>
+      strings['request_sent_wait_activ'];
   static String refreshActivationStatus() => strings['update_activ_status'];
   static String appActivated() => strings['app_activ'];
   static String completeRegistration() => strings['complite_activ'];
@@ -218,7 +241,8 @@ class StringsLocalization {
   static String registrationGuide() => strings['registration_guide'];
   static String usageGuide() => strings['usage_guide'];
   static String commonGuide() => strings['common_guide'].replaceAll('\n', "\n");
-  static String supportGuide(String phone, String url) => sprintf(strings['support_guide'], [phone, url]);
+  static String supportGuide(String phone, String url) =>
+      sprintf(strings['support_guide'], [phone, url]);
   static String joys() => strings['joys'];
   static String joysMinus() => strings['joys_minus'];
   static String joysHint() => strings['joys_hint'];
@@ -226,4 +250,6 @@ class StringsLocalization {
   static String returnLabel() => strings['returnLabel'];
   static String returnConfirmed() => strings['return_confirmation'];
   static String points() => strings['points'];
-  }
+  static String cancel() => strings['cancel'];
+  static String cancelDialog() => strings['purchase_cancellation'];
+}

pubspec.lock

@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   async:
     dependency: transitive
@@ -61,7 +61,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.1.7"
   path:
     dependency: transitive
     description:
@@ -166,5 +166,5 @@ packages:
     source: hosted
     version: "3.2.3"
 sdks:
-  dart: ">=2.0.0 <3.0.0"
+  dart: ">=2.2.2 <3.0.0"
   flutter: ">=0.1.4 <2.0.0"