Merge pull request #657 from cake-tech/CW-66-open-app-from-qr-code

Cw 66 open app from qr code

lib/src/screens/root/root.dart

@@ -1,10 +1,12 @@
 import 'dart:async';
+import 'package:cake_wallet/utils/payment_request.dart';
 import 'package:flutter/material.dart';
 import 'package:cake_wallet/routes.dart';
 import 'package:cake_wallet/src/screens/auth/auth_page.dart';
 import 'package:cake_wallet/store/app_store.dart';
 import 'package:cake_wallet/store/authentication_store.dart';
 import 'package:cake_wallet/entities/qr_scanner.dart';
+import 'package:uni_links/uni_links.dart';
 
 class Root extends StatefulWidget {
   Root(
@@ -35,6 +37,9 @@ class RootState extends State<Root> with WidgetsBindingObserver {
   bool _isInactive;
   bool _postFrameCallback;
 
+  StreamSubscription<Uri?>? stream;
+  Uri? launchUri;
+
   @override
   void initState() {
     _isInactiveController = StreamController<bool>.broadcast();
@@ -42,6 +47,34 @@ class RootState extends State<Root> with WidgetsBindingObserver {
     _postFrameCallback = false;
     WidgetsBinding.instance.addObserver(this);
     super.initState();
+
+    initUniLinks();
+  }
+
+  @override
+  void dispose() {
+    stream?.cancel();
+    super.dispose();
+  }
+
+  /// handle app links while the app is already started
+  /// whether its in the foreground or in the background.
+  Future<void> initUniLinks() async {
+    try {
+      stream = uriLinkStream.listen((Uri? uri) {
+        handleDeepLinking(uri);
+      });
+
+      handleDeepLinking(await getInitialUri());
+    } catch (e) {
+      print(e);
+    }
+  }
+
+  void handleDeepLinking(Uri? uri) {
+    if (uri == null || !mounted) return;
+
+    launchUri = uri;
   }
 
   @override
@@ -75,7 +108,11 @@ class RootState extends State<Root> with WidgetsBindingObserver {
           }
 
           _reset();
-          auth.close();
+          auth.close(
+            route: launchUri != null ? Routes.send : null,
+            arguments: PaymentRequest.fromUri(launchUri),
+          );
+          launchUri = null;
         });
       });
     }

lib/src/screens/send/send_page.dart

@@ -4,6 +4,7 @@ import 'package:cake_wallet/src/screens/send/widgets/send_card.dart';
 import 'package:cake_wallet/src/widgets/alert_with_two_actions.dart';
 import 'package:cake_wallet/src/widgets/picker.dart';
 import 'package:cake_wallet/src/widgets/template_tile.dart';
+import 'package:cake_wallet/utils/payment_request.dart';
 import 'package:cake_wallet/view_model/send/output.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
@@ -25,11 +26,15 @@ import 'package:smooth_page_indicator/smooth_page_indicator.dart';
 import 'package:cw_core/crypto_currency.dart';
 
 class SendPage extends BasePage {
-  SendPage({required this.sendViewModel}) : _formKey = GlobalKey<FormState>();
+  SendPage({
+    required this.sendViewModel,
+    this.initialPaymentRequest,
+  }) : _formKey = GlobalKey<FormState>();
 
   final SendViewModel sendViewModel;
   final GlobalKey<FormState> _formKey;
   final controller = PageController(initialPage: 0);
+  final PaymentRequest? initialPaymentRequest;
 
   bool _effectsInstalled = false;
 
@@ -116,6 +121,7 @@ class SendPage extends BasePage {
                               key: output.key,
                               output: output,
                               sendViewModel: sendViewModel,
+                              initialPaymentRequest: initialPaymentRequest,
                             );
                           });
                     },

lib/src/screens/send/widgets/send_card.dart

@@ -1,4 +1,5 @@
 import 'package:cake_wallet/entities/priority_for_wallet_type.dart';
+import 'package:cake_wallet/src/widgets/alert_with_one_action.dart';
 import 'package:cake_wallet/utils/payment_request.dart';
 import 'package:cw_core/transaction_priority.dart';
 import 'package:cake_wallet/routes.dart';
@@ -20,21 +21,28 @@ class SendCard extends StatefulWidget {
   SendCard({
     Key? key,
     required this.output,
-    required this.sendViewModel}) : super(key: key);
+    required this.sendViewModel,
+    this.initialPaymentRequest,
+  }) : super(key: key);
 
   final Output output;
   final SendViewModel sendViewModel;
+  final PaymentRequest? initialPaymentRequest;
 
   @override
   SendCardState createState() => SendCardState(
     output: output,
-    sendViewModel: sendViewModel
+    sendViewModel: sendViewModel,
+    initialPaymentRequest: initialPaymentRequest,
   );
 }
 
 class SendCardState extends State<SendCard>
     with AutomaticKeepAliveClientMixin<SendCard> {
-  SendCardState({required this.output, required this.sendViewModel})
+  SendCardState({
+    required this.output,
+    required this.sendViewModel,
+    this.initialPaymentRequest})
       : addressController = TextEditingController(),
         cryptoAmountController = TextEditingController(),
         fiatAmountController = TextEditingController(),
@@ -49,6 +57,7 @@ class SendCardState extends State<SendCard>
 
   final Output output;
   final SendViewModel sendViewModel;
+  final PaymentRequest? initialPaymentRequest;
 
   final TextEditingController addressController;
   final TextEditingController cryptoAmountController;
@@ -61,6 +70,27 @@ class SendCardState extends State<SendCard>
 
   bool _effectsInstalled = false;
 
+  @override
+  void initState() {
+    super.initState();
+
+    /// if the current wallet doesn't match the one in the qr code
+    if (initialPaymentRequest != null &&
+        sendViewModel.walletCurrencyName != initialPaymentRequest!.scheme.toLowerCase()) {
+      WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
+        showPopUp<void>(
+            context: context,
+            builder: (BuildContext context) {
+              return AlertWithOneAction(
+                  alertTitle: S.of(context).error,
+                  alertContent: S.of(context).unmatched_currencies,
+                  buttonText: S.of(context).ok,
+                  buttonAction: () => Navigator.of(context).pop());
+            });
+      });
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     super.build(context);
@@ -512,8 +542,12 @@ class SendCardState extends State<SendCard>
   }
 
   void _setEffects(BuildContext context) {
-    addressController.text = output.address;
-    cryptoAmountController.text = output.cryptoAmount;
+    if (output.address.isNotEmpty) {
+      addressController.text = output.address;
+    }
+    if (output.cryptoAmount.isNotEmpty) {
+      cryptoAmountController.text = output.cryptoAmount;
+    }
     fiatAmountController.text = output.fiatAmount;
     noteController.text = output.note;
     extractedAddressController.text = output.extractedAddress;
@@ -605,6 +639,13 @@ class SendCardState extends State<SendCard>
       extractedAddressController.text = extractedAddress;
     });
 
+    if (initialPaymentRequest != null &&
+        sendViewModel.walletCurrencyName == initialPaymentRequest!.scheme.toLowerCase()) {
+      addressController.text = initialPaymentRequest!.address;
+      cryptoAmountController.text = initialPaymentRequest!.amount;
+      noteController.text = initialPaymentRequest!.note;
+    }
+
     _effectsInstalled = true;
   }