Initial commit

Lts/Common/LtsWebSocket/data_manager_base_dl.h

@@ -0,0 +1,61 @@
+/**
+  * @RDE_HEADER@
+  * The DataManager class is a convenience class for managing structure data
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Philipp Dassow, SLST, 2017-12-12
+  */
+#pragma once
+#include <memory>
+#include <NGLLogger/INGLLogger.h>
+
+#include "reply_message.h"
+
+namespace LtsWebSocket
+{
+/**
+ * @brief The DataManager class is a convenience class for managing structure data from db
+ *        T needs to be of namspace::DatabaseInterface
+ */
+template<typename T>
+class DataManagerBaseDl
+{
+protected: // methods
+  /**
+   * @brief DataManager Constructor
+   * @param dbInterface Interface for requesting db-structs data
+   */
+  explicit DataManagerBaseDl(const std::shared_ptr<T> &dbInterface, NGL::INGLLogger &logger)
+    : m_logger(logger)
+    , m_dbInterface(dbInterface)
+  {}
+
+  /**
+   * @brief toBaseDataMessageFromDb selects the DbType data from the db and converts it to JSON
+   * @param uuid of the base DL request
+   * @return message send to the requester
+   */
+  template<typename DbType, typename MessageType>
+  ReplyMessage *toBaseDataMessageFromDb(const QString &uuid) const
+  {
+    QVector<DbType> dataVec;
+    // read all data from database
+    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: // attributes
+  NGL::INGLLogger &m_logger;
+  std::shared_ptr<T> m_dbInterface;
+}; // class DataManagerBaseDl
+} // namespace LtsWebSocket