13450 merge 12267_new_flow and update to new flutter version

2019-11-20 16:37:36 +03:00
parent 8ca95b0d34 b5c4166f15
commit f535ec5fe0
16 changed files with 490 additions and 226 deletions
--- a/lib/screens/finish_registration.dart
+++ b/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';
--- a/lib/screens/purchase.dart
+++ b/lib/screens/purchase.dart
@@ -1,52 +1,59 @@
-import 'package:checker/base/base_screen.dart';
-import 'package:checker/db.dart';
-import 'package:checker/screens/return.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
+import 'dart:async';
 import 'dart:convert';
 import 'dart:core';
-import 'dart:async';

-import 'package:checker/resources.dart';
-import 'package:checker/strings.dart';
+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/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) : super(helper, app);
+  PurchaseScreen(helper, app, this.user, this.card, this.sum)
+      : 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(
-      StringsLocalization.buyer(),
-      user['first_name'] == null ? '' : user['first_name']
-    ));
+    widgetList.add(getValueWithDescription(StringsLocalization.buyer(),
+        user['first_name'] == null ? '' : user['first_name']));
    widgetList.add(getValueWithDescription(StringsLocalization.card(), card));

-    if ((app != 'crypto')) {
-      widgetList.add(getValueWithDescription(StringsLocalization.reward(), loyalty));
+    if (app != 'crypto') {
+      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(
-            couponItem['offer_name'],
-            couponItem['coupon_condition'],
-            couponItem['isSet'],
-              (val) {
-              setState(() {
-                couponItem['isSet'] = val;
-              });
-            }
-          ));
+          widgetList.add(getItemToggleSwitch(couponItem['offer_name'],
+              couponItem['coupon_condition'], couponItem['isSet'], (val) {
+            setState(() {
+              couponItem['isSet'] = val;
+            });
+          }));
        });
      }
    }
@@ -111,16 +115,14 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
    widgetList.add(wrapButton(getScreenMargins(36.0), getCompleteButton()));

    widgetList.add(wrapButton(
-      getScreenMargins(24.0),
-      getScanButton(
-        context,
-        StringsLocalization.scan(),
-        Resources.getPrimaryColor(app)
-      )
-    ));
+        getScreenMargins(24.0),
+        getCancelScanButton(context, StringsLocalization.cancel(),
+            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) =>
-        ReturnScreen(helper, app, user['id'], user['bonus']), fullscreenDialog: true);
+      Route route = MaterialPageRoute<String>(
+          builder: (BuildContext context) =>
+              ReturnScreen(helper, app, user['id'], user['bonus']),
+          fullscreenDialog: true);
      Navigator.push(context, route);
    });
  }
@@ -141,9 +145,8 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
    var bonusTextField = new TextField(
      keyboardType: TextInputType.number,
      decoration: new InputDecoration.collapsed(
-        hintText: StringsLocalization.bonusHint(),
-        hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)
-      ),
+          hintText: StringsLocalization.bonusHint(),
+          hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)),
      focusNode: bonusFocusNode,
      controller: bonusController,
      onSubmitted: (String text) {
@@ -157,26 +160,21 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
    return new Column(
      children: <Widget>[
        new Container(
-          margin: new EdgeInsets.only(
-            left: verticalMargin,
-            right: verticalMargin,
-            top: verticalMargin
-          ),
-          padding: getInputFieldContainerPadding(),
-          decoration: getInputFieldContainerDecoration(),
-          child: bonusTextField
-        ),
+            margin: new EdgeInsets.only(
+                left: verticalMargin,
+                right: verticalMargin,
+                top: verticalMargin),
+            padding: getInputFieldContainerPadding(),
+            decoration: getInputFieldContainerDecoration(),
+            child: bonusTextField),
        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),
-          )
-        )
+            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),
+            ))
      ],
    );
  }
@@ -188,19 +186,20 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {

  getCompleteButton() {
    return buildRaisedButton(
-      StringsLocalization.completePurchase(), () => onPurchaseClick());
+        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()),
-      decoration: new BoxDecoration(
-        border: new Border.all(
-          color: Resources.getButtonColor(app), width: 1.0),
-        borderRadius: new BorderRadius.all(new Radius.circular(4.0))));
+        height: buttonHeight,
+        child: new FlatButton(
+            child: new Text(title, style: new TextStyle(color: textColor)),
+            onPressed: () => restartFlow()),
+        decoration: new BoxDecoration(
+            border: new Border.all(
+                color: Resources.getButtonColor(app), width: 1.0),
+            borderRadius: new BorderRadius.all(new Radius.circular(4.0))));
  }

  @override
@@ -216,18 +215,18 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
  @override
  getTextWidget() {
    return new TextField(
-      keyboardType: TextInputType.number,
-      decoration: new InputDecoration.collapsed(
-        hintText: getHintString(),
-        hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)),
-      controller: controller,
-      focusNode: sumFocusNode,
-      onSubmitted: (String text) {
-        setState(() {
-          controller.text = _parseSum(text);
-        });
-      },
-      textAlign: TextAlign.center);
+        keyboardType: TextInputType.number,
+        decoration: new InputDecoration.collapsed(
+            hintText: getHintString(),
+            hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)),
+        controller: controller,
+        focusNode: sumFocusNode,
+        onSubmitted: (String text) {
+          setState(() {
+            controller.text = _parseSum(text);
+          });
+        },
+        textAlign: TextAlign.center);
  }

  requestAsyncData(Map user) async {
@@ -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',
-          token
-        );
-      } catch(error) {
+            user['coupons_url'] + '?status=ACTIVE', token);
+      } catch (error) {
        print(error.toString());
      }
      Map loyality = json.decode(response.body);
@@ -263,10 +260,10 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
  // TODO: Переделать, если потребуется
  String _cleanupNumber(String text) {
    String tmp = text
-      .replaceAll(' ', '')
-      .replaceAll('-', '')
-      .replaceAll(',', '.')
-      .replaceAll('..', '.');
+        .replaceAll(' ', '')
+        .replaceAll('-', '')
+        .replaceAll(',', '.')
+        .replaceAll('..', '.');

    while (tmp.indexOf('..') != -1) {
      tmp = tmp.replaceAll('..', '.');
@@ -299,59 +296,94 @@ 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:
-          new Text(
-            StringsLocalization.confirmPurchase(val, currency)
-          ),
-          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();
-                purchase(val);
-              },
-            )
-          ]));
+          context: context,
+          builder: (_) => new AlertDialog(
+                  title: new Text(StringsLocalization.confirmation()),
+                  content: Text(StringsLocalization.purchaseDetails(
+                      totalAmount, totalDiscount, discount, currency)),
+                  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();
+                        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(
-        content: new Text(errorText),
-        actions: <Widget>[
-          new FlatButton(
-            child: new Text('Ok'),
-            onPressed: () {
-              Navigator.of(context).pop();
-            },
-          )
-        ]
-      )
-    );
+        context: context,
+        builder: (_) =>
+            new AlertDialog(content: new Text(errorText), 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;
-
-          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);
-            });
-          });
+          callback(purchase, sumTotal, 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;
-      this.loyalty = '${loyaltyVal.toStringAsFixed(0)}%';
+              bonuses['amount_to_bonus'][0]) *
+          100;
+      setState(() => this.loyalty = '${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() {
-    helper.getToken().then((token) {
-      Navigator.of(context).pop(token);
-    });
+  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.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);
        }
-
      });
    });
  }
--- a/lib/screens/purchase_success.dart
+++ b/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));
  }


--- a/lib/screens/purchase_sum.dart
+++ b/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);
+      }
+    });
+  }
+}
--- a/lib/screens/splash.dart
+++ b/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) {
-      platform.invokeMethod('getAppToken').then((appToken) {
-        Map<String, String> args = StringsLocalization.strings;
-        args['token'] = token;
-        args['url'] = url;
-        args['appToken'] = appToken;
-        args['localeCode'] = StringsLocalization.localeCode;
-        args['color'] = Resources
-          .getPrimaryColor(app)
-          .value
-          .toString();
-        platform.invokeMethod('startScanner', args);
-      });
-    });
+    Navigator.of(context).pushReplacement(
+      MaterialPageRoute(builder: (context) =>
+        PurchaseSumScreen(helper, app, token))
+    );
  }
 }