//----------------------------------------------------------------------------
//  EgalTech 2013-2013
//----------------------------------------------------------------------------
// File : GdbIterator.cpp           Data : 04.12.13        Versione : 1.4a3
// Contenuto : Implementazione della classe GdbIterator.
//
//
//
// Modifiche : 04.12.13 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

//--------------------------- Include ----------------------------------------
#include "stdafx.h"
#include <new>
#include "GdbIterator.h"

using namespace std ;

//----------------------------------------------------------------------------
IGdbIterator*
CreateGdbIterator( void)
{
   return static_cast<IGdbIterator*> ( new GdbIterator) ;
}

//----------------------------------------------------------------------------
// GdbIterator
//----------------------------------------------------------------------------
GdbIterator::GdbIterator( void)
{
   m_pGDB = nullptr ;
   m_pCurrNode = nullptr ;
}

//----------------------------------------------------------------------------
GdbIterator::~GdbIterator( void)
{
  // TODO : togliere link da GdbGeom per essere notificato della cancellazione di nodi 
}

//----------------------------------------------------------------------------
bool
GdbIterator::SetGDB( IGeomDB* pGDB)
{
   m_pGDB = dynamic_cast<GeomDB*>( pGDB) ;

   return ( m_pGDB != nullptr) ;
}

//----------------------------------------------------------------------------
bool
GdbIterator::GoTo( int nId)
{
   if ( m_pGDB == nullptr)
      return false ;

   m_pCurrNode = m_pGDB->GetGdbNode( nId) ;

   return ( m_pCurrNode != nullptr) ;
}

//----------------------------------------------------------------------------
bool
GdbIterator::GoToFirstInGroup( int nIdGroup)
{
   GdbGroup* pGdbGroup ;


   if ( m_pGDB == nullptr)
      return false ;

  // recupero il gruppo
   pGdbGroup = m_pGDB->GetGdbGroup( nIdGroup) ;
   if ( pGdbGroup == nullptr) {
      m_pCurrNode = nullptr ;
      return false ;
   }

  // recupero il nodo
   m_pCurrNode = pGdbGroup->GetFirstNode() ;

   return ( m_pCurrNode != nullptr) ;
}

//----------------------------------------------------------------------------
bool
GdbIterator::GoToNext( void)
{
   if ( m_pGDB == nullptr  ||  m_pCurrNode == nullptr)
      return false ;

   m_pCurrNode = m_pCurrNode->GetNext() ;

   return ( m_pCurrNode != nullptr) ;
}

//----------------------------------------------------------------------------
bool
GdbIterator::GoToLastInGroup( int nIdGroup)
{
   GdbGroup* pGdbGroup ;


   if ( m_pGDB == nullptr)
      return false ;

  // recupero il gruppo
   pGdbGroup = m_pGDB->GetGdbGroup( nIdGroup) ;
   if ( pGdbGroup == nullptr) {
      m_pCurrNode = nullptr ;
      return false ;
   }

  // recupero il nodo
   m_pCurrNode = pGdbGroup->GetLastNode() ;

   return ( m_pCurrNode != nullptr) ;
}

//----------------------------------------------------------------------------
bool
GdbIterator::GoToPrev( void)
{
   if ( m_pGDB == nullptr  ||  m_pCurrNode == nullptr)
      return false ;

   m_pCurrNode = m_pCurrNode->GetPrev() ;

   return ( m_pCurrNode != nullptr) ;
}

//----------------------------------------------------------------------------
GdbType
GdbIterator::GetGdbType( void) const
{
   if ( m_pGDB == nullptr  ||  m_pCurrNode == nullptr)
      return GDB_NONE ;

  // se oggetto geometrico
   if ( GetGdbObj( m_pCurrNode) != nullptr)
      return GDB_GEO ;
  // se gruppo
   else if ( GetGdbGroup( m_pCurrNode) != nullptr)
      return GDB_GROUP ;
  // altro
   else
      return GDB_NONE ;
}

//----------------------------------------------------------------------------
IGeoObj*
GdbIterator::GetGeoObj( void)
{
   const GdbObj* pGdbObj ;


   if ( m_pGDB == nullptr  ||  m_pCurrNode == nullptr)
      return false ;

  // recupero l'oggetto Gdb
   if ( ( pGdbObj = GetGdbObj( m_pCurrNode)) == nullptr)
      return nullptr ;

  // restituisco il suo contenuto geometrico
   return pGdbObj->m_pGeoObj ;
}

//----------------------------------------------------------------------------
Frame3d*
GdbIterator::GetGroupFrame( void)
{
   GdbGroup* pGdbGroup ;


   if ( m_pGDB == nullptr  ||  m_pCurrNode == nullptr)
      return nullptr ;

   if ( ( pGdbGroup = GetGdbGroup( m_pCurrNode)) == nullptr)
      return nullptr ;

   return &( pGdbGroup->m_gfrFrame.m_frF) ;
}

//----------------------------------------------------------------------------
bool
GdbIterator::GetGroupGlobFrame( Frame3d& frGlob)
{
   GdbGroup* pGdbGroup ;


   if ( m_pGDB == nullptr  ||  m_pCurrNode == nullptr)
      return false ;

   if ( ( pGdbGroup = GetGdbGroup( m_pCurrNode)) == nullptr)
      return false ;

   return pGdbGroup->GetGlobFrame( frGlob) ;
}

//----------------------------------------------------------------------------
int
GdbIterator::GetId( void)
{
   if ( m_pGDB == nullptr  ||  m_pCurrNode == nullptr)
      return - 1 ;

   return m_pCurrNode->m_nId ;
}

//----------------------------------------------------------------------------
int
GdbIterator::GetParentId( void)
{
   if ( m_pGDB == nullptr  ||  m_pCurrNode == nullptr)
      return - 1 ;

   return m_pCurrNode->GetParentId() ;
}