Update legacy database hashes automatically

src/browser/BrowserAction.cpp

@@ -149,6 +149,16 @@ QJsonObject BrowserAction::handleGetDatabaseHash(const QJsonObject& json, const
 
         QJsonObject message = buildMessage(newNonce);
         message["hash"] = hash;
+
+        // Update a legacy database hash if found
+        const QJsonArray hashes = decrypted.value("connectedKeys").toArray();
+        if (!hashes.isEmpty()) {
+            const QString legacyHash = getLegacyDatabaseHash();
+            if (hashes.contains(legacyHash)) {
+                message["oldHash"] = legacyHash;
+            }
+        }
+
         return buildResponse(action, message, newNonce);
     }
 
@@ -528,6 +538,17 @@ QString BrowserAction::getReturnValue(const BrowserService::ReturnValue returnVa
 }
 
 QString BrowserAction::getDatabaseHash()
+{
+    QMutexLocker locker(&m_mutex);
+    QByteArray hash =
+        QCryptographicHash::hash(
+            m_browserService.getDatabaseRootUuid().toUtf8(),
+            QCryptographicHash::Sha256)
+            .toHex();
+    return QString(hash);
+}
+
+QString BrowserAction::getLegacyDatabaseHash()
 {
     QMutexLocker locker(&m_mutex);
     QByteArray hash =

src/browser/BrowserAction.h

@@ -75,6 +75,7 @@ private:
     QString getErrorMessage(const int errorCode) const;
     QString getReturnValue(const BrowserService::ReturnValue returnValue) const;
     QString getDatabaseHash();
+    QString getLegacyDatabaseHash();
 
     QString encryptMessage(const QJsonObject& message, const QString& nonce);
     QJsonObject decryptMessage(const QString& message, const QString& nonce);