/************************************************************************
 * EOS - the CERN Disk Storage System                                   *
 * Copyright (C) 2018 CERN/Switzerland                                  *
 *                                                                      *
 * This program is free software: you can redistribute it and/or modify *
 * it under the terms of the GNU General Public License as published by *
 * the Free Software Foundation, either version 3 of the License, or    *
 * (at your option) any later version.                                  *
 *                                                                      *
 * This program 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 General Public License for more details.                         *
 *                                                                      *
 * You should have received a copy of the GNU General Public License    *
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.*
 ************************************************************************/

//------------------------------------------------------------------------------
// author: Georgios Bitzes <georgios.bitzes@cern.ch>
// desc:   Namespace etag utilities
//------------------------------------------------------------------------------

#pragma once
#include <string>
#include "proto/FileMd.pb.h"

namespace eos
{
namespace fst
{
class FmdBase;
}

class IFileMD;
class IContainerMD;

//----------------------------------------------------------------------------
//! Calculate etag for the given FileMD.
//----------------------------------------------------------------------------
void calculateEtag(const IFileMD* const fmd, std::string& out);
void calculateEtag(const eos::ns::FileMdProto& proto, std::string& out);

//----------------------------------------------------------------------------
//! Calculate etag for the given ContainerMD.
//! TODO(gbitzes): Make cmd const?
//----------------------------------------------------------------------------
void calculateEtag(IContainerMD* cmd, std::string& out);

//----------------------------------------------------------------------------
//! Calculate etag - supply flag to indicate whether to use checksum or not.
//----------------------------------------------------------------------------
void calculateEtag(bool useChecksum, const fst::FmdBase& fmdBase,
                   std::string& out);

//----------------------------------------------------------------------------
//! Calculate etag based on fst fmdproto - assume checksum exists.
//----------------------------------------------------------------------------
void calculateEtagInodeAndChecksum(const fst::FmdBase& fmdBase,
                                   std::string& out);

//----------------------------------------------------------------------------
//! Calculate etag based on inode + mtime.
//----------------------------------------------------------------------------
void calculateEtagInodeAndMtime(uint64_t fid, uint64_t mtimeSec,
                                std::string& out);
}