/*
  track.cpp  -  Implementation of the Track class
 
  Copyright (C)         Lumiera.org
    2008,               Joel Holdsworth <joel@airwebreathe.org.uk>
 
  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.
 
* *****************************************************/

#include "track.hpp"
#include "parent-track.hpp"
#include <boost/foreach.hpp>

using namespace boost;
using namespace std;

namespace gui {
namespace model {
  
const list< shared_ptr<Track> > Track::NoChildren;

Track::Track()
{

}

list< shared_ptr<Track> >
Track::get_child_tracks() const
{
  return Track::NoChildren;
}

const string
Track::get_name() const
{
  return name;
}

void
Track::set_name(const string &name)
{
  this->name = name;
}

bool
Track::can_host_children() const
{
  return false;
}

bool
Track::remove_child_track(const shared_ptr<Track> /*track*/)
{
  return false;
}

string
Track::print_branch()
{
  return print_branch_recursive(0);
}

shared_ptr<ParentTrack>
Track::find_parent(shared_ptr<ParentTrack> root, shared_ptr<Track> child)
{ 
  REQUIRE(root != NULL);
  REQUIRE(child != NULL);
  const list< shared_ptr<Track> > children = root->get_child_tracks();
  BOOST_FOREACH(shared_ptr<Track> track, children)
    {
      if(track == child)
        return root;
    
      shared_ptr<ParentTrack> parent_track = 
        dynamic_pointer_cast<model::ParentTrack, model::Track>(
          track);
      if(parent_track)
        {
          shared_ptr<ParentTrack> result = find_parent(
            parent_track, child);
          if(result)
            return result;
        }
    }
  
  return shared_ptr<ParentTrack>();
}

string
Track::print_branch_recursive(const unsigned int indentation)
{
  string str;
  
  for(unsigned int i = 0; i < indentation; i++)
    str += "  ";
  str += print_track();
  str += "\n";
  
  BOOST_FOREACH(shared_ptr<Track> track, get_child_tracks())
    {
      REQUIRE(track);
      str += track->print_branch_recursive(indentation + 1);
    }
  
  return str;
}

}   // namespace model
}   // namespace gui