CAKE-306 | added MoonPay option for BTC buying; applied PreOrderPage to the app; created Wyre and MoonPay buy providers

lib/view_model/buy/buy_amount_view_model.dart

@@ -0,0 +1,28 @@
+import 'package:mobx/mobx.dart';
+import 'package:cake_wallet/entities/fiat_currency.dart';
+
+part 'buy_amount_view_model.g.dart';
+
+class BuyAmountViewModel = BuyAmountViewModelBase with _$BuyAmountViewModel;
+
+abstract class BuyAmountViewModelBase with Store {
+  BuyAmountViewModelBase() : amount = '';
+
+  @observable
+  String amount;
+
+  FiatCurrency get fiatCurrency => FiatCurrency.usd;
+
+  @computed
+  double get doubleAmount {
+    double _amount;
+
+    try {
+      _amount = double.parse(amount.replaceAll(',', '.')) ?? 0.0;
+    } catch (e) {
+      _amount = 0.0;
+    }
+
+    return _amount;
+  }
+}

lib/view_model/buy/buy_item.dart

@@ -0,0 +1,29 @@
+import 'package:cake_wallet/buy/buy_amount.dart';
+import 'package:cake_wallet/buy/buy_provider.dart';
+import 'package:cake_wallet/entities/fiat_currency.dart';
+import 'package:cake_wallet/view_model/buy/buy_amount_view_model.dart';
+
+class BuyItem {
+  BuyItem({this.provider, this.buyAmountViewModel});
+
+  final BuyProvider provider;
+  final BuyAmountViewModel buyAmountViewModel;
+
+  double get amount => buyAmountViewModel.doubleAmount;
+
+  FiatCurrency get fiatCurrency => buyAmountViewModel.fiatCurrency;
+
+  Future<BuyAmount> get buyAmount async {
+    BuyAmount _buyAmount;
+
+    try {
+      _buyAmount = await provider
+          .calculateAmount(amount?.toString(), fiatCurrency.title);
+    } catch (e) {
+      _buyAmount = BuyAmount(sourceAmount: 0.0, destAmount: 0.0);
+      print(e.toString());
+    }
+
+    return _buyAmount;
+  }
+}

lib/view_model/buy/buy_view_model.dart

@@ -0,0 +1,81 @@
+import 'package:cake_wallet/buy/buy_provider.dart';
+import 'package:cake_wallet/buy/moonpay/moonpay_buy_provider.dart';
+import 'package:cake_wallet/buy/wyre/wyre_buy_provider.dart';
+import 'package:cake_wallet/entities/crypto_currency.dart';
+import 'package:cake_wallet/entities/fiat_currency.dart';
+import 'package:cake_wallet/entities/wallet_type.dart';
+import 'package:cake_wallet/view_model/buy/buy_item.dart';
+import 'package:flutter/foundation.dart';
+import 'package:hive/hive.dart';
+import 'package:cake_wallet/buy/order.dart';
+import 'package:cake_wallet/store/dashboard/orders_store.dart';
+import 'package:mobx/mobx.dart';
+import 'package:cake_wallet/core/wallet_base.dart';
+import 'buy_amount_view_model.dart';
+
+part 'buy_view_model.g.dart';
+
+class BuyViewModel = BuyViewModelBase with _$BuyViewModel;
+
+abstract class BuyViewModelBase with Store {
+  BuyViewModelBase(this.ordersSource, this.ordersStore, this.buyAmountViewModel,
+      {@required this.wallet}) {
+    providerList = [
+      WyreBuyProvider(wallet: wallet),
+      MoonPayBuyProvider(wallet: wallet)
+    ];
+    items = providerList.map((provider) =>
+        BuyItem(provider: provider, buyAmountViewModel: buyAmountViewModel))
+        .toList();
+    isRunning = false;
+    isDisabled = true;
+  }
+
+  final Box<Order> ordersSource;
+  final OrdersStore ordersStore;
+  final BuyAmountViewModel buyAmountViewModel;
+  final WalletBase wallet;
+
+  @observable
+  List<BuyProvider> providerList;
+
+  @observable
+  BuyProvider selectedProvider;
+
+  @observable
+  List<BuyItem> items;
+
+  @observable
+  bool isRunning;
+
+  @observable
+  bool isDisabled;
+
+  WalletType get type => wallet.type;
+
+  double get doubleAmount => buyAmountViewModel.doubleAmount;
+
+  FiatCurrency get fiatCurrency => buyAmountViewModel.fiatCurrency;
+
+  CryptoCurrency get cryptoCurrency => walletTypeToCryptoCurrency(type);
+
+  Future createOrder() async {
+    try {
+      final url = await selectedProvider
+            ?.requestUrl(doubleAmount?.toString(), fiatCurrency.title);
+       // FIXME: Start WebView
+    } catch (e) {
+      print(e.toString());
+    }
+  }
+
+  Future<void> saveOrder(String orderId) async {
+    try {
+      final order = await selectedProvider?.findOrderById(orderId);
+      await ordersSource.add(order);
+      ordersStore.setOrder(order);
+    } catch (e) {
+      print(e.toString());
+    }
+  }
+}

lib/view_model/dashboard/dashboard_view_model.dart

@@ -4,7 +4,7 @@ import 'dart:io';
 import 'package:cake_wallet/bitcoin/bitcoin_transaction_info.dart';
 import 'package:cake_wallet/bitcoin/bitcoin_wallet.dart';
 import 'package:cake_wallet/entities/balance.dart';
-import 'package:cake_wallet/entities/order.dart';
+import 'package:cake_wallet/buy/order.dart';
 import 'package:cake_wallet/entities/transaction_history.dart';
 import 'package:cake_wallet/exchange/trade_state.dart';
 import 'package:cake_wallet/monero/account.dart';
@@ -95,8 +95,6 @@ abstract class DashboardViewModelBase with Store {
       ]
     };
 
-    isRunningWebView = false;
-
     name = appStore.wallet?.name;
     wallet ??= appStore.wallet;
     type = wallet.type;
@@ -162,9 +160,6 @@ abstract class DashboardViewModelBase with Store {
   @observable
   String subname;
 
-  @observable
-  bool isRunningWebView;
-
   @computed
   String get address => wallet.address;
 

lib/view_model/dashboard/order_list_item.dart

@@ -1,4 +1,4 @@
-import 'package:cake_wallet/entities/order.dart';
+import 'package:cake_wallet/buy/order.dart';
 import 'package:cake_wallet/store/settings_store.dart';
 import 'package:cake_wallet/view_model/dashboard/action_list_item.dart';
 import 'package:cake_wallet/entities/balance_display_mode.dart';

lib/view_model/order_details_view_model.dart

@@ -1,5 +1,5 @@
 import 'dart:async';
-import 'package:cake_wallet/entities/order.dart';
+import 'package:cake_wallet/buy/order.dart';
 import 'package:cake_wallet/utils/date_formatter.dart';
 import 'package:cake_wallet/view_model/wyre_view_model.dart';
 import 'package:mobx/mobx.dart';

lib/view_model/wyre_view_model.dart

@@ -1,7 +1,7 @@
 import 'package:cake_wallet/entities/wyre_service.dart';
 import 'package:flutter/foundation.dart';
 import 'package:hive/hive.dart';
-import 'package:cake_wallet/entities/order.dart';
+import 'package:cake_wallet/buy/order.dart';
 import 'package:cake_wallet/store/dashboard/orders_store.dart';
 import 'package:mobx/mobx.dart';