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// ** National Center for Atmospheric Research (NCAR)                        
// ** Boulder, Colorado, USA                                                 
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/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/

// RCS info
//   $Author: dixon $
//   $Locker:  $
//   $Date: 2016/03/03 18:06:33 $
//   $Id: MdvTimeListHandler.cc,v 1.4 2016/03/03 18:06:33 dixon Exp $
//   $Revision: 1.4 $
//   $State: Exp $
 
/**-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-**/
/*********************************************************************
 * MdvTimeListHandler: Class which handles the processing of a time
 *                     list based on an MDV URL.
 *
 * RAP, NCAR, Boulder CO
 *
 * April 2002
 *
 * Nancy Rehak
 *
 *********************************************************************/

#include <dsdata/MdvTimeListHandler.hh>
using namespace std;



/**********************************************************************
 * Constructors
 */

MdvTimeListHandler::MdvTimeListHandler(const string &url,
				       const time_t start_time,
				       const time_t end_time) :
  TimeListHandler(url, start_time, end_time)
{
  // Do nothing
}


/**********************************************************************
 * Destructor
 */

MdvTimeListHandler::~MdvTimeListHandler()
{
  // Do nothing
}


/**********************************************************************
 * init() - Initialize the object.  The object must be initialized
 *          before it can be used.
 *
 * Returns true on success, false on error.
 * 
 * Use getErrStr() for error message.
 */

bool MdvTimeListHandler::init()
{
  const string method_name = "MdvTimeListHandler::init()";
  
  _clearErrStr();

  // set mode for dsMdvxTimes object

  int iret = _dsMdvxTimes.setArchive(_url, _startTime, _endTime);

  if (iret)
  {
    _errStr = "ERROR - " + method_name + "\n";
    _errStr += _dsMdvxTimes.getErrStr();
    
    return false;
  }

  return true;
}


/**********************************************************************
 * next() - Get the next trigger and set the triggerInfo accordingly
 *
 * Returns the next data time upon success, -1 upon failure or if there
 * are no more data times to process.
 */

time_t MdvTimeListHandler::next()
{
  const string method_name = "MdvTimeListHandler::next()";
  
  time_t issue_time;
  
  // clear out the old stuff

  _clearErrStr();

  // Check for end of trigger data

  if (endOfData())
    return -1;

  if (_dsMdvxTimes.getNext(issue_time))
  {
    _errStr = "ERROR - " + method_name + "\n";
    _errStr += _dsMdvxTimes.getErrStr();

    return -1;
  }

  return issue_time;
}


/**********************************************************************
 * endOfData() - Check whether we are at the end of the data.
 */

bool MdvTimeListHandler::endOfData() const
{
  return _dsMdvxTimes.endOfData();
}


/**********************************************************************
 * reset() - Reset to start of data list
 */

void MdvTimeListHandler::reset()
{
  _dsMdvxTimes.reset();
}