From 6245dfe88588336bda16015578a8366267c9780c Mon Sep 17 00:00:00 2001
From: OleksandrSobol <dr.alexander.sobol@gmail.com>
Date: Mon, 1 Mar 2021 20:16:28 +0200
Subject: [PATCH] CAKE-284 | added static function
 defineUrlForCalculatingAmount() to changenow_exchange_provider.dart; fixed
 FAQ in the support_view_model.dart

---
 .../changenow_exchange_provider.dart          | 77 +++++++++----------
 .../settings/settings_view_model.dart         |  1 -
 lib/view_model/support_view_model.dart        |  8 +-
 3 files changed, 42 insertions(+), 44 deletions(-)

diff --git a/lib/exchange/changenow/changenow_exchange_provider.dart b/lib/exchange/changenow/changenow_exchange_provider.dart
index 02e6d9f7c..01b6f1b96 100644
--- a/lib/exchange/changenow/changenow_exchange_provider.dart
+++ b/lib/exchange/changenow/changenow_exchange_provider.dart
@@ -158,30 +158,17 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
         ? DateTime.parse(expiredAtRaw).toLocal()
         : null;
 
-    if (expiredAt != null) {
-      return Trade(
-          id: id,
-          from: from,
-          to: to,
-          provider: description,
-          inputAddress: inputAddress,
-          amount: expectedSendAmount,
-          state: state,
-          extraId: extraId,
-          expiredAt: expiredAt,
-          outputTransaction: outputTransaction);
-    } else {
-      return Trade(
-          id: id,
-          from: from,
-          to: to,
-          provider: description,
-          inputAddress: inputAddress,
-          amount: expectedSendAmount,
-          state: state,
-          extraId: extraId,
-          outputTransaction: outputTransaction);
-    }
+    return Trade(
+        id: id,
+        from: from,
+        to: to,
+        provider: description,
+        inputAddress: inputAddress,
+        amount: expectedSendAmount,
+        state: state,
+        extraId: extraId,
+        expiredAt: expiredAt,
+        outputTransaction: outputTransaction);
   }
 
   @override
@@ -215,23 +202,7 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
 
       return estimatedAmount;
     } else {
-      final url = isFixedRateMode
-          ? apiUri +
-          _exchangeAmountUriSufix +
-          _fixedRateUriSufix +
-          amount.toString() +
-          '/' +
-          from.toString() +
-          '_' +
-          to.toString() +
-          '?api_key=' + apiKey
-          : apiUri +
-          _exchangeAmountUriSufix +
-          amount.toString() +
-          '/' +
-          from.toString() +
-          '_' +
-          to.toString();
+      final url = defineUrlForCalculatingAmount(from, to, amount, isFixedRateMode);
       final response = await get(url);
       final responseJSON = json.decode(response.body) as Map<String, dynamic>;
       final estimatedAmount = responseJSON['estimatedAmount'] as double;
@@ -239,4 +210,28 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
       return estimatedAmount;
     }
   }
+
+  static String defineUrlForCalculatingAmount(
+      CryptoCurrency from,
+      CryptoCurrency to,
+      double amount,
+      bool isFixedRateMode) {
+    return isFixedRateMode
+        ? apiUri +
+        _exchangeAmountUriSufix +
+        _fixedRateUriSufix +
+        amount.toString() +
+        '/' +
+        from.toString() +
+        '_' +
+        to.toString() +
+        '?api_key=' + apiKey
+        : apiUri +
+        _exchangeAmountUriSufix +
+        amount.toString() +
+        '/' +
+        from.toString() +
+        '_' +
+        to.toString();
+  }
 }
diff --git a/lib/view_model/settings/settings_view_model.dart b/lib/view_model/settings/settings_view_model.dart
index 19214006c..c0dcf27bd 100644
--- a/lib/view_model/settings/settings_view_model.dart
+++ b/lib/view_model/settings/settings_view_model.dart
@@ -20,7 +20,6 @@ import 'package:cake_wallet/entities/node.dart';
 import 'package:cake_wallet/entities/monero_transaction_priority.dart';
 import 'package:cake_wallet/entities/action_list_display_mode.dart';
 import 'package:cake_wallet/view_model/settings/version_list_item.dart';
-import 'package:cake_wallet/view_model/settings/link_list_item.dart';
 import 'package:cake_wallet/view_model/settings/picker_list_item.dart';
 import 'package:cake_wallet/view_model/settings/regular_list_item.dart';
 import 'package:cake_wallet/view_model/settings/settings_list_item.dart';
diff --git a/lib/view_model/support_view_model.dart b/lib/view_model/support_view_model.dart
index 4e5633b50..f5661745c 100644
--- a/lib/view_model/support_view_model.dart
+++ b/lib/view_model/support_view_model.dart
@@ -6,6 +6,7 @@ import 'package:cake_wallet/view_model/settings/settings_list_item.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:mobx/mobx.dart';
+import 'package:url_launcher/url_launcher.dart';
 
 part 'support_view_model.g.dart';
 
@@ -16,8 +17,9 @@ abstract class SupportViewModelBase with Store {
     items = [
       RegularListItem(
         title: S.current.faq,
-        handler: (BuildContext context) =>
-            Navigator.pushNamed(context, Routes.faq),
+        handler: (BuildContext context) async {
+          if (await canLaunch(url)) await launch(url);
+        },
       ),
       LinkListItem(
           title: 'Email',
@@ -40,5 +42,7 @@ abstract class SupportViewModelBase with Store {
           link: 'mailto:support@changenow.io')
     ];
   }
+  static const url = 'https://cakewallet.com/guide/';
+
   List<SettingsListItem> items;
 }
\ No newline at end of file