Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Lts/Common/LtsWebSocket/data_manager_base_dl.h

@@ -0,0 +1,48 @@
+
+
+#pragma once
+#include <memory>
+#include <NGLLogger/INGLLogger.h>
+
+#include "reply_message.h"
+
+namespace LtsWebSocket
+{
+
+
+template<typename T>
+class DataManagerBaseDl
+{
+protected: 
+  
+
+  explicit DataManagerBaseDl(const std::shared_ptr<T> &dbInterface, NGL::INGLLogger &logger)
+    : m_logger(logger)
+    , m_dbInterface(dbInterface)
+  {}
+
+  
+
+  template<typename DbType, typename MessageType>
+  ReplyMessage *toBaseDataMessageFromDb(const QString &uuid) const
+  {
+    QVector<DbType> dataVec;
+    
+    if (!m_dbInterface->select(dataVec))
+    {
+      const QString errorMessage = QStringLiteral("Error reading data from database!");
+      ERROR_LOG(m_logger) << errorMessage;
+      ErrorMessage::ErrorData errData;
+      errData.errorMessage = errorMessage;
+      errData.uuid = uuid;
+      return new ErrorMessage(errData);
+    }
+
+    return new MessageType (m_dbInterface->template toJson<DbType>(dataVec), uuid);
+  }
+
+protected: 
+  NGL::INGLLogger &m_logger;
+  std::shared_ptr<T> m_dbInterface;
+}; 
+}