Merge bitcoin-core/gui#471: Add Wallet Restore in the GUI

bc13ec888cdc2791f79eeb6eb76b9134d670043e doc: Add a release note about the "restore wallet" menu item (w0xlt)
e7a3f698b5f3f7dde8632c4911abd4e5bc1f06cb gui: Add Wallet Restore in the GUI (w0xlt)

Pull request description:

  This PR adds a menu item to restore a wallet from a backup file in the GUI.
  Currently this option exists only in RPC interface.

  Motivation: It makes easier for non-technical users to restore backups.

  Master | PR |
  --- | ---
  <img width="307" alt="master" src="https://user-images.githubusercontent.com/94266259/141673349-0bf8a237-ecec-42e4-a0d7-1d5863940036.png"> | <img width="307" alt="pr" src="https://user-images.githubusercontent.com/94266259/141673350-972dea23-ae56-4283-a365-819da62b7067.png"> |

ACKs for top commit:
  w0xlt:
    Added a release note in a new commit (https://github.com/bitcoin-core/gui/pull/471/commits/bc13ec888cdc2791f79eeb6eb76b9134d670043e) to not invalidate the ACKs for the previous one.
  furszy:
    utACK bc13ec8
  shaavan:
    ACK bc13ec888cdc2791f79eeb6eb76b9134d670043e
  hebasto:
    ACK bc13ec888cdc2791f79eeb6eb76b9134d670043e

Tree-SHA512: edc3675484238857b77e74382a4041dd5d2cbcda1e2d5bfe52c83d9d7bb7be8a243ecd97e25e994d8c30ab6d7c59ead5a1c953a46dce173666b137eeffc3c94f

1 files changed, 43 insertions, 0 deletions

diff --git a/src/qt/walletcontroller.cpp b/src/qt/walletcontroller.cpp
index d27ddf1aba..11140c5da9 100644
--- a/src/qt/walletcontroller.cpp
+++ b/src/qt/walletcontroller.cpp
@@ -373,3 +373,46 @@ void LoadWalletsActivity::load()
         QTimer::singleShot(0, this, [this] { Q_EMIT finished(); });
     });
 }
+
+RestoreWalletActivity::RestoreWalletActivity(WalletController* wallet_controller, QWidget* parent_widget)
+    : WalletControllerActivity(wallet_controller, parent_widget)
+{
+}
+
+void RestoreWalletActivity::restore(const fs::path& backup_file, const std::string& wallet_name)
+{
+    QString name = QString::fromStdString(wallet_name);
+
+    showProgressDialog(
+        //: Title of progress window which is displayed when wallets are being restored.
+        tr("Restore Wallet"),
+        /*: Descriptive text of the restore wallets progress window which indicates to
+            the user that wallets are currently being restored.*/
+        tr("Restoring Wallet <b>%1</b>…").arg(name.toHtmlEscaped()));
+
+    QTimer::singleShot(0, worker(), [this, backup_file, wallet_name] {
+        std::unique_ptr<interfaces::Wallet> wallet = node().walletLoader().restoreWallet(backup_file, wallet_name, m_error_message, m_warning_message);
+
+        if (wallet) m_wallet_model = m_wallet_controller->getOrCreateWallet(std::move(wallet));
+
+        QTimer::singleShot(0, this, &RestoreWalletActivity::finish);
+    });
+}
+
+void RestoreWalletActivity::finish()
+{
+    if (!m_error_message.empty()) {
+        //: Title of message box which is displayed when the wallet could not be restored.
+        QMessageBox::critical(m_parent_widget, tr("Restore wallet failed"), QString::fromStdString(m_error_message.translated));
+    } else if (!m_warning_message.empty()) {
+        //: Title of message box which is displayed when the wallet is restored with some warning.
+        QMessageBox::warning(m_parent_widget, tr("Restore wallet warning"), QString::fromStdString(Join(m_warning_message, Untranslated("\n")).translated));
+    } else {
+        //: Title of message box which is displayed when the wallet is successfully restored.
+        QMessageBox::information(m_parent_widget, tr("Restore wallet message"), QString::fromStdString(Untranslated("Wallet restored successfully \n").translated));
+    }
+
+    if (m_wallet_model) Q_EMIT restored(m_wallet_model);
+
+    Q_EMIT finished();
+}