// navaids.hxx -- navaids management class
//
// Written by Curtis Olson, started April 2000.
//
// Copyright (C) 2000  Curtis L. Olson - curt@flightgear.org
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$


#ifndef _FG_NAVAIDS_HXX
#define _FG_NAVAIDS_HXX


#include <simgear/compiler.h>
#include <simgear/misc/fgpath.hxx>

#include <map>
#include <vector>

#include "navaid.hxx"

FG_USING_STD(map);
FG_USING_STD(vector);


// convenience types
typedef vector < FGNavAid > nav_list_type;
typedef nav_list_type::iterator nav_list_iterator;
typedef nav_list_type::const_iterator nav_list_const_iterator;

typedef map < int, nav_list_type, less<int> > nav_map_type;
typedef nav_map_type::iterator nav_map_iterator;
typedef nav_map_type::const_iterator nav_map_const_iterator;

class FGNavAids {

    nav_map_type navaids;

public:

    FGNavAids();
    ~FGNavAids();

    // load the navaids and build the map
    bool init( FGPath path );

    // query the database for the specified frequency
    FGNavAid query( double lon, double lat, int freq );
};


#endif // _FG_NAVAIDS_HXX