/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013-2017 Regents of the University of California.
 *
 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
 *
 * ndn-cxx library is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 *
 * You should have received copies of the GNU General Public License and GNU Lesser
 * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
 */

#ifndef NDN_IMS_IN_MEMORY_STORAGE_ENTRY_HPP
#define NDN_IMS_IN_MEMORY_STORAGE_ENTRY_HPP

#include "../data.hpp"
#include "../interest.hpp"
#include "../util/scheduler-scoped-event-id.hpp"

namespace ndn {

/** @brief Represents an in-memory storage entry
 */
class InMemoryStorageEntry : noncopyable
{
public:
  /** @brief Create an entry
   */
  InMemoryStorageEntry();

  /** @brief Releases reference counts on shared objects
   */
  void
  release();

  /** @brief Returns the name of the Data packet stored in the in-memory storage entry
   */
  const Name&
  getName() const
  {
    return m_dataPacket->getName();
  }

  /** @brief Returns the full name (including implicit digest) of the Data packet stored
   *         in the in-memory storage entry
   */
  const Name&
  getFullName() const
  {
    return m_dataPacket->getFullName();
  }

  /** @brief Returns the Data packet stored in the in-memory storage entry
   */
  const Data&
  getData() const
  {
    return *m_dataPacket;
  }

  /** @brief Changes the content of in-memory storage entry
   *
   *  This method also allows data to satisfy Interest with MustBeFresh
   */
  void
  setData(const Data& data);

  /** @brief Set eventId for the markStale event.
   */
  void
  setMarkStaleEventId(unique_ptr<util::scheduler::ScopedEventId> eventId);

  /** @brief Disable the data from satisfying interest with MustBeFresh
   */
  void
  markStale();

  /** @brief Check if the data can satisfy an interest with MustBeFresh
   */
  bool
  isFresh()
  {
    return m_isFresh;
  }

private:
  shared_ptr<const Data> m_dataPacket;

  bool m_isFresh;
  unique_ptr<util::scheduler::ScopedEventId> m_markStaleEventId;
};

} // namespace ndn

#endif // NDN_IMS_IN_MEMORY_STORAGE_ENTRY_HPP