feat: Add more bootstrap features

lib/components/dialogs/bootstrap_dialog.dart

@@ -10,11 +10,15 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/l10n.dart';
 
+import 'key_verification_dialog.dart';
+
 class BootstrapDialog extends StatefulWidget {
+  final bool wipe;
   const BootstrapDialog({
     Key key,
     @required this.l10n,
     @required this.client,
+    this.wipe = false,
   }) : super(key: key);
 
   Future<bool> show(BuildContext context) => PlatformInfos.isCupertinoStyle
@@ -42,7 +46,7 @@ class _BootstrapDialogState extends State<BootstrapDialog> {
 
   bool _recoveryKeyStored = false;
 
-  bool _wipe = false;
+  bool _wipe;
 
   void _createBootstrap(bool wipe) {
     setState(() {
@@ -56,6 +60,7 @@ class _BootstrapDialogState extends State<BootstrapDialog> {
 
   @override
   Widget build(BuildContext context) {
+    _wipe ??= widget.wipe;
     final buttons = <AdaptiveFlatButton>[];
     Widget body = LinearProgressIndicator();
     titleText = widget.l10n.loadingPleaseWait;
@@ -155,6 +160,19 @@ class _BootstrapDialogState extends State<BootstrapDialog> {
               }
             },
           ));
+          buttons.add(AdaptiveFlatButton(
+            child: Text('Transfer from another device'),
+            onPressed: () async {
+              final req = await widget
+                  .client.userDeviceKeys[widget.client.userID]
+                  .startVerification();
+              await KeyVerificationDialog(
+                request: req,
+                l10n: widget.l10n,
+              ).show(context);
+              Navigator.of(context).pop();
+            },
+          ));
           buttons.add(AdaptiveFlatButton(
               child: Text(widget.l10n.next),
               onPressed: () async {

lib/views/settings.dart

@@ -504,10 +504,28 @@ class _SettingsState extends State<Settings> {
                 trailing: Icon(Icons.wb_cloudy_outlined),
                 subtitle: Text(
                     '${client.encryption.keyManager.enabled ? L10n.of(context).onlineKeyBackupEnabled : L10n.of(context).onlineKeyBackupDisabled}\n${client.encryption.crossSigning.enabled ? L10n.of(context).crossSigningEnabled : L10n.of(context).crossSigningDisabled}'),
-                onTap: () => BootstrapDialog(
-                  l10n: L10n.of(context),
-                  client: Matrix.of(context).client,
-                ).show(context),
+                onTap: () async {
+                  if (await client.encryption.keyManager.isCached()) {
+                    if (OkCancelResult.ok ==
+                        await showOkCancelAlertDialog(
+                          context: context,
+                          title: L10n.of(context).keysCached,
+                          message:
+                              'Wipe your chat backup to create a new security key?',
+                          isDestructiveAction: true,
+                        )) {
+                      return BootstrapDialog(
+                        l10n: L10n.of(context),
+                        client: Matrix.of(context).client,
+                        wipe: true,
+                      ).show(context);
+                    }
+                  }
+                  return BootstrapDialog(
+                    l10n: L10n.of(context),
+                    client: Matrix.of(context).client,
+                  ).show(context);
+                },
               ),
             },
             Divider(thickness: 1),