Fixes for validation of monero seed. Add French and Italian seeds validation.

lib/monero/cw_monero.dart

@@ -186,6 +186,10 @@ class CWMonero extends Monero {
 		    return RussianMnemonics.words;
 		  case 'spanish':
 		    return SpanishMnemonics.words;
+		  case 'french':
+		  	return FrenchMnemonics.words;
+		  case 'italian':
+		  	return ItalianMnemonics.words;
 		  default:
 		    return EnglishMnemonics.words;
 		}

lib/src/screens/restore/wallet_restore_from_seed_form.dart

@@ -18,7 +18,9 @@ class WalletRestoreFromSeedForm extends StatefulWidget {
       @required this.displayBlockHeightSelector,
       @required this.type,
       this.blockHeightFocusNode,
-      this.onHeightOrDateEntered})
+      this.onHeightOrDateEntered,
+      this.onSeedChange,
+      this.onLanguageChange})
       : super(key: key);
 
   final WalletType type;
@@ -26,6 +28,8 @@ class WalletRestoreFromSeedForm extends StatefulWidget {
   final bool displayBlockHeightSelector;
   final FocusNode blockHeightFocusNode;
   final Function(bool) onHeightOrDateEntered;
+  final void Function(String) onSeedChange;
+  final void Function(String) onLanguageChange;
 
   @override
   WalletRestoreFromSeedFormState createState() =>
@@ -62,7 +66,10 @@ class WalletRestoreFromSeedFormState extends State<WalletRestoreFromSeedForm> {
               validator:  WalletNameValidator()),
           Container(height: 20),
           SeedWidget(
-              key: seedWidgetStateKey, language: language, type: widget.type),
+              key: seedWidgetStateKey,
+              language: language,
+              type: widget.type,
+              onSeedChange: widget.onSeedChange),
           if (widget.displayLanguageSelector)
             GestureDetector(
                 onTap: () async {
@@ -98,6 +105,7 @@ class WalletRestoreFromSeedFormState extends State<WalletRestoreFromSeedForm> {
       this.language = language;
       seedWidgetStateKey.currentState.changeSeedLanguage(language);
       _setLanguageLabel(language);
+      widget.onLanguageChange?.call(language);
     });
   }
 

lib/src/screens/restore/wallet_restore_page.dart

@@ -18,6 +18,7 @@ import 'package:cake_wallet/utils/show_pop_up.dart';
 import 'package:cake_wallet/core/validator.dart';
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/src/widgets/base_text_form_field.dart';
+import 'package:cake_wallet/core/seed_validator.dart';
 
 class WalletRestorePage extends BasePage {
   WalletRestorePage(this.walletRestoreViewModel)
@@ -39,8 +40,40 @@ class WalletRestorePage extends BasePage {
               type: walletRestoreViewModel.type,
               key: walletRestoreFromSeedFormKey,
               blockHeightFocusNode: _blockHeightFocusNode,
-              onHeightOrDateEntered: (value) =>
-                  walletRestoreViewModel.isButtonEnabled = value));
+              onHeightOrDateEntered: (value) {
+                if (_isValidSeed()) {
+                  walletRestoreViewModel.isButtonEnabled = value;
+                }
+              },
+              onSeedChange: (String seed) {
+                final hasHeight = walletRestoreFromSeedFormKey
+                    .currentState
+                    .blockchainHeightKey
+                    .currentState
+                    .restoreHeightController
+                    .text
+                    .isNotEmpty;
+                if (hasHeight) {
+                  walletRestoreViewModel.isButtonEnabled = _isValidSeed();
+                }
+              },
+              onLanguageChange: (_) {
+                if (walletRestoreViewModel.hasBlockchainHeightLanguageSelector) {
+                  final hasHeight = walletRestoreFromSeedFormKey
+                    .currentState
+                    .blockchainHeightKey
+                    .currentState
+                    .restoreHeightController
+                    .text
+                    .isNotEmpty;
+
+                  if (hasHeight) {
+                    walletRestoreViewModel.isButtonEnabled = _isValidSeed(); 
+                  }
+                } else {
+                  walletRestoreViewModel.isButtonEnabled = _isValidSeed();
+                }
+              }));
           break;
         case WalletRestoreMode.keys:
           _pages.add(WalletRestoreFromKeysFrom(
@@ -169,6 +202,31 @@ class WalletRestorePage extends BasePage {
     ])));
   }
 
+  bool _isValidSeed() {
+    final seedWords = walletRestoreFromSeedFormKey
+      .currentState
+      .seedWidgetStateKey
+      .currentState
+      .text
+      .split(' ');
+    
+    if (seedWords.length != walletRestoreViewModel.seedMnemonicLength) {
+      return false;
+    }
+
+    final words = walletRestoreFromSeedFormKey
+      .currentState
+      .seedWidgetStateKey
+      .currentState
+      .words
+      .toSet();
+    return seedWords
+      .toSet()
+      .difference(words)
+      .toSet()
+      .isEmpty;
+  }
+
   Map<String, dynamic> _credentials() {
     final credentials = <String, dynamic>{};
 

lib/src/widgets/seed_widget.dart

@@ -12,10 +12,11 @@ import 'package:cake_wallet/generated/i18n.dart';
 import 'package:flutter/widgets.dart';
 
 class SeedWidget extends StatefulWidget {
-  SeedWidget({Key key, this.language, this.type}) : super(key: key);
+  SeedWidget({Key key, this.language, this.type, this.onSeedChange}) : super(key: key);
 
   final String language;
   final WalletType type;
+  final void Function(String) onSeedChange;
 
   @override
   SeedWidgetState createState() => SeedWidgetState(language, type);
@@ -52,6 +53,7 @@ class SeedWidgetState extends State<SeedWidget> {
   void initState() {
     super.initState();
     _showPlaceholder = true;
+    controller.addListener(() => widget.onSeedChange?.call(text));
   }
 
   void changeSeedLanguage(String language) {

lib/view_model/wallet_restore_view_model.dart

@@ -1,4 +1,5 @@
 import 'package:cake_wallet/bitcoin/bitcoin.dart';
+import 'package:cake_wallet/core/mnemonic_length.dart';
 import 'package:flutter/foundation.dart';
 import 'package:hive/hive.dart';
 import 'package:mobx/mobx.dart';
@@ -35,17 +36,24 @@ abstract class WalletRestoreViewModelBase extends WalletCreationVM with Store {
     _walletCreationService.changeWalletType(type: type);
   }
 
+  static const moneroSeedMnemonicLength = 25;
+  static const electrumSeedMnemonicLength = 24;
+
+  final List<WalletRestoreMode> availableModes;
+  final bool hasSeedLanguageSelector;
+  final bool hasBlockchainHeightLanguageSelector;
+  final WalletCreationService _walletCreationService;
+
   @observable
   WalletRestoreMode mode;
 
   @observable
   bool isButtonEnabled;
 
-  final List<WalletRestoreMode> availableModes;
-  final bool hasSeedLanguageSelector;
-  final bool hasBlockchainHeightLanguageSelector;
-
-  final WalletCreationService _walletCreationService;
+  int get seedMnemonicLength =>
+    type == WalletType.monero
+    ? moneroSeedMnemonicLength
+    : electrumSeedMnemonicLength;
 
   @override
   WalletCredentials getCredentials(dynamic options) {

tool/configure.dart

@@ -143,6 +143,8 @@ import 'package:cw_monero/mnemonics/japanese.dart';
 import 'package:cw_monero/mnemonics/russian.dart';
 import 'package:cw_monero/mnemonics/spanish.dart';
 import 'package:cw_monero/mnemonics/portuguese.dart';
+import 'package:cw_monero/mnemonics/french.dart';
+import 'package:cw_monero/mnemonics/italian.dart';
 """;
   const moneroCwPart = "part 'cw_monero.dart';";
   const moneroContent = """