Backup.

lib/src/screens/backup/backup_page.dart

@@ -0,0 +1,93 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter_mobx/flutter_mobx.dart';
+import 'package:esys_flutter_share/esys_flutter_share.dart';
+import 'package:cake_wallet/routes.dart';
+import 'package:cake_wallet/generated/i18n.dart';
+import 'package:cake_wallet/src/widgets/alert_with_two_actions.dart';
+import 'package:cake_wallet/src/widgets/primary_button.dart';
+import 'package:cake_wallet/src/widgets/trail_button.dart';
+import 'package:cake_wallet/utils/show_pop_up.dart';
+import 'package:cake_wallet/view_model/backup_view_model.dart';
+import 'package:cake_wallet/core/execution_state.dart';
+import 'package:cake_wallet/src/screens/base_page.dart';
+
+class BackupPage extends BasePage {
+  BackupPage(this.backupViewModelBase);
+
+  final BackupViewModelBase backupViewModelBase;
+
+  @override
+  String get title => 'Backup';
+
+  @override
+  Widget trailing(BuildContext context) => TrailButton(
+      caption: S.of(context).edit,
+      onPressed: () =>
+          Navigator.of(context).pushNamed(Routes.editBackupPassword));
+
+  @override
+  Widget body(BuildContext context) {
+    return Stack(
+      fit: StackFit.expand,
+      children: [
+        Center(
+            child: Container(
+                padding: EdgeInsets.only(left: 20, right: 20),
+                height: 225,
+                child: Column(children: [
+                  Text(
+                    'Backup password:',
+                    style: TextStyle(fontSize: 30),
+                  ),
+                  Padding(
+                      padding: EdgeInsets.only(top: 20, bottom: 10),
+                      child: Observer(
+                          builder: (_) => Text(
+                                backupViewModelBase.backupPassword,
+                                style: TextStyle(fontSize: 26),
+                              ))),
+                  Padding(
+                      padding: EdgeInsets.all(20),
+                      child: Text(
+                        'Please write down your Backup Password. Backup Password uses for import of backup files.',
+                        style: TextStyle(fontSize: 14, color: Colors.grey),
+                        textAlign: TextAlign.center,
+                      ))
+                ]))),
+        Positioned(
+          child: Observer(
+              builder: (_) => LoadingPrimaryButton(
+                  isLoading: backupViewModelBase.state is IsExecutingState,
+                  onPressed: () => onExportBackup(context),
+                  text: 'Export backup',
+                  color: Theme.of(context).accentTextTheme.body2.color,
+                  textColor: Colors.white)),
+          bottom: 30,
+          left: 20,
+          right: 20,
+        )
+      ],
+    );
+  }
+
+  void onExportBackup(BuildContext context) {
+    showPopUp<void>(
+        context: context,
+        builder: (dialogContext) {
+          return AlertWithTwoActions(
+              alertTitle: 'Export backup',
+              alertContent:
+                  'Please be sure that you have saved your Backup Password.You will be no available to import backup files without Backup Password.\n\nHave you written it down?',
+              rightButtonText: S.of(context).seed_alert_yes,
+              leftButtonText: S.of(context).seed_alert_back,
+              actionRightButton: () async {
+                Navigator.of(dialogContext).pop();
+                final backup = await backupViewModelBase.exportBackup();
+                await Share.file(
+                    'Backup file', backup.name, backup.content, 'text');
+              },
+              actionLeftButton: () => Navigator.of(dialogContext).pop());
+        });
+  }
+}

lib/src/screens/backup/edit_backup_password_page.dart

@@ -0,0 +1,73 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter_mobx/flutter_mobx.dart';
+import 'package:cake_wallet/generated/i18n.dart';
+import 'package:cake_wallet/utils/show_pop_up.dart';
+import 'package:cake_wallet/src/screens/base_page.dart';
+import 'package:cake_wallet/src/widgets/alert_with_two_actions.dart';
+import 'package:cake_wallet/src/widgets/primary_button.dart';
+import 'package:cake_wallet/view_model/edit_backup_password_view_model.dart';
+
+class EditBackupPasswordPage extends BasePage {
+  EditBackupPasswordPage(this.editBackupPasswordViewModel)
+      : textEditingController = TextEditingController() {
+    textEditingController.text = editBackupPasswordViewModel.backupPassword;
+    textEditingController.addListener(() => editBackupPasswordViewModel
+        .backupPassword = textEditingController.text);
+  }
+
+  final EditBackupPasswordViewModel editBackupPasswordViewModel;
+  final TextEditingController textEditingController;
+
+  @override
+  String get title => 'Edit Backup Password';
+
+  @override
+  Widget body(BuildContext context) {
+    return Padding(
+        padding: EdgeInsets.only(left: 20, right: 20),
+        child: Stack(
+          fit: StackFit.expand,
+          children: [
+            Center(
+                child: Observer(
+                    builder: (_) => TextFormField(
+                        autofocus: true,
+                        enableSuggestions: false,
+                        autocorrect: false,
+                        keyboardType: TextInputType.visiblePassword,
+                        controller: textEditingController,
+                        style: TextStyle(fontSize: 26, color: Colors.black)))),
+            Positioned(
+                child: Observer(
+                    builder: (_) => PrimaryButton(
+                        onPressed: () => onSave(context),
+                        text: 'Save',
+                        color: Theme.of(context).accentTextTheme.body2.color,
+                        textColor: Colors.white,
+                        isDisabled: !editBackupPasswordViewModel.canSave)),
+                bottom: 30,
+                left: 0,
+                right: 0)
+          ],
+        ));
+  }
+
+  void onSave(BuildContext context) {
+    showPopUp<void>(
+        context: context,
+        builder: (dialogContext) {
+          return AlertWithTwoActions(
+              alertTitle: 'Save backup password',
+              alertContent:
+                  'Your previous backup files will be not available to import with new backup password. New backup password will be used only for new backup files. Are you sure that you want to change backup password ?',
+              rightButtonText: S.of(context).ok,
+              leftButtonText: S.of(context).cancel,
+              actionRightButton: () async {
+                await editBackupPasswordViewModel.save();
+                Navigator.of(dialogContext)..pop()..pop();
+              },
+              actionLeftButton: () => Navigator.of(dialogContext).pop());
+        });
+  }
+}

lib/src/screens/restore/restore_from_backup_page.dart

@@ -0,0 +1,88 @@
+import 'package:cake_wallet/generated/i18n.dart';
+import 'package:cake_wallet/src/widgets/alert_with_one_action.dart';
+import 'package:cake_wallet/utils/show_pop_up.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/src/widgets/framework.dart';
+import 'package:cake_wallet/src/widgets/primary_button.dart';
+import 'package:cake_wallet/view_model/restore_from_backup_view_model.dart';
+import 'package:cake_wallet/src/screens/base_page.dart';
+import 'package:file_picker/file_picker.dart';
+
+class RestoreFromBackupPage extends BasePage {
+  RestoreFromBackupPage(this.restoreFromBackupViewModel)
+      : textEditingController = TextEditingController();
+
+  final RestoreFromBackupViewModel restoreFromBackupViewModel;
+  final TextEditingController textEditingController;
+
+  @override
+  String get title => 'Restore from backup';
+
+  @override
+  Widget body(BuildContext context) {
+    return Container(
+        padding: EdgeInsets.only(bottom: 30, left: 25, right: 25),
+        child: Column(children: [
+          Expanded(
+            child: Container(
+              child: Center(
+                  child: TextFormField(
+                      obscureText: true,
+                      enableSuggestions: false,
+                      autocorrect: false,
+                      decoration: InputDecoration(
+                          hintText: 'Enter backup password here'),
+                      keyboardType: TextInputType.visiblePassword,
+                      controller: textEditingController,
+                      style: TextStyle(fontSize: 26, color: Colors.black))),
+            ),
+          ),
+          Container(
+              child: Row(children: [
+            Expanded(
+                child: PrimaryButton(
+                    onPressed: () => presentFilePicker(),
+                    text: 'Select backup file',
+                    color: Colors.grey,
+                    textColor: Colors.white)),
+            SizedBox(width: 20),
+            Expanded(
+                child: PrimaryButton(
+                    onPressed: () => onImportHandler(context),
+                    text: 'Import',
+                    color: Theme.of(context).accentTextTheme.body2.color,
+                    textColor: Colors.white))
+          ])),
+        ]));
+  }
+
+  Future<void> presentFilePicker() async {
+    final result = await FilePicker.platform.pickFiles();
+
+    if (result?.files?.isEmpty ?? true) {
+      return;
+    }
+
+    restoreFromBackupViewModel.filePath = result.files.first.path;
+  }
+
+  Future<void> onImportHandler(BuildContext context) async {
+    if (textEditingController.text.isEmpty ||
+        (restoreFromBackupViewModel.filePath.isEmpty ?? true)) {
+      await showPopUp<void>(
+          context: context,
+          builder: (_) {
+            return AlertWithOneAction(
+                alertTitle: S.current.error,
+                alertContent:
+                    'Please select backup file and enter backup password.',
+                buttonText: S.of(context).ok,
+                buttonAction: () => Navigator.of(context).pop());
+          });
+
+      return;
+    }
+
+    await restoreFromBackupViewModel.import(textEditingController.text);
+  }
+}

lib/src/screens/restore/restore_options_page.dart

@@ -1,6 +1,5 @@
 import 'package:cake_wallet/entities/wallet_type.dart';
 import 'package:flutter/material.dart';
-import 'package:cake_wallet/palette.dart';
 import 'package:cake_wallet/routes.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:cake_wallet/src/screens/restore/widgets/restore_button.dart';
@@ -39,7 +38,8 @@ class RestoreOptionsPage extends BasePage {
             Padding(
               padding: EdgeInsets.only(top: 24),
               child: RestoreButton(
-                  onPressed: () {},
+                  onPressed: () => Navigator.pushNamed(
+                      context, Routes.restoreFromBackup),
                   image: imageBackup,
                   title: S.of(context).restore_title_from_backup,
                   description: S.of(context).restore_description_from_backup

lib/src/widgets/trail_button.dart

@@ -21,7 +21,7 @@ class TrailButton extends StatelessWidget {
         child: Text(
           caption,
           style: TextStyle(
-            color: Theme.of(context).textTheme.subhead.decorationColor,
+            color: Theme.of(context).textTheme.display1.color,
             fontWeight: FontWeight.w500,
             fontSize: 14),
         ),