// Created on: 2001-09-04
// Created by: Julia DOROVSKIKH
// Copyright (c) 2001-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#include <Message_Messenger.hxx>
#include <Standard_PCharacter.hxx>
#include <Standard_Type.hxx>
#include <TDF_Label.hxx>
#include <TDF_Tool.hxx>
#include <XCAFDoc_GraphNode.hxx>
#include <XmlMXCAFDoc_GraphNodeDriver.hxx>
#include <XmlObjMgt.hxx>
#include <XmlObjMgt_Persistent.hxx>

IMPLEMENT_STANDARD_RTTIEXT(XmlMXCAFDoc_GraphNodeDriver, XmlMDF_ADriver)
IMPLEMENT_DOMSTRING(TreeIdString, "treeid")
IMPLEMENT_DOMSTRING(ChildrenString, "children")
IMPLEMENT_DOMSTRING(FathersString, "fathers")

//=================================================================================================

XmlMXCAFDoc_GraphNodeDriver::XmlMXCAFDoc_GraphNodeDriver(
  const occ::handle<Message_Messenger>& theMsgDriver)
    : XmlMDF_ADriver(theMsgDriver, "xcaf", "GraphNode")
{
}

//=================================================================================================

occ::handle<TDF_Attribute> XmlMXCAFDoc_GraphNodeDriver::NewEmpty() const
{
  return (new XCAFDoc_GraphNode());
}

//=======================================================================
// function : Paste
// purpose  : persistent -> transient (retrieve)
//=======================================================================
bool XmlMXCAFDoc_GraphNodeDriver::Paste(const XmlObjMgt_Persistent&       theSource,
                                        const occ::handle<TDF_Attribute>& theTarget,
                                        XmlObjMgt_RRelocationTable&       theRelocTable) const
{
  occ::handle<XCAFDoc_GraphNode> aT        = occ::down_cast<XCAFDoc_GraphNode>(theTarget);
  const XmlObjMgt_Element&       anElement = theSource;

  // tree id
  XmlObjMgt_DOMString aGUIDStr = anElement.getAttribute(::TreeIdString());
  Standard_GUID       aGUID(static_cast<const char*>(aGUIDStr.GetString()));
  aT->SetGraphID(aGUID);

  XmlObjMgt_DOMString            aDOMStr;
  occ::handle<XCAFDoc_GraphNode> aTChild;

  // fathers
  aDOMStr = anElement.getAttribute(::FathersString());
  if (aDOMStr != nullptr) // void list is allowed
  {
    const char* aChildren = static_cast<const char*>(aDOMStr.GetString());
    int         aNb       = 0;
    if (!XmlObjMgt::GetInteger(aChildren, aNb))
    {
      return false;
    }

    while (aNb > 0)
    {
      // Find or create GraphNode attribute with the given ID
      if (theRelocTable.IsBound(aNb))
      {
        aTChild = occ::down_cast<XCAFDoc_GraphNode>(theRelocTable.Find(aNb));
        if (aTChild.IsNull())
        {
          return false;
        }
      }
      else
      {
        aTChild = new XCAFDoc_GraphNode;
        theRelocTable.Bind(aNb, aTChild);
      }

      // Add the child to the current tree
      aTChild->SetGraphID(aGUID);
      aT->SetFather(aTChild);

      // Get next child ID
      if (!XmlObjMgt::GetInteger(aChildren, aNb))
      {
        aNb = 0;
      }
    }
  }

  // children
  aDOMStr = anElement.getAttribute(::ChildrenString());
  if (aDOMStr != nullptr) // void list is allowed
  {
    const char* aChildren = static_cast<const char*>(aDOMStr.GetString());
    int         aNb       = 0;
    if (!XmlObjMgt::GetInteger(aChildren, aNb))
    {
      return false;
    }

    while (aNb > 0)
    {
      // Find or create GraphNode attribute with the given ID
      if (theRelocTable.IsBound(aNb))
      {
        aTChild = occ::down_cast<XCAFDoc_GraphNode>(theRelocTable.Find(aNb));
        if (aTChild.IsNull())
        {
          return false;
        }
      }
      else
      {
        aTChild = new XCAFDoc_GraphNode;
        theRelocTable.Bind(aNb, aTChild);
      }

      // Add the child to the current tree
      aTChild->SetGraphID(aGUID);
      aT->SetChild(aTChild);

      // Get next child ID
      if (!XmlObjMgt::GetInteger(aChildren, aNb))
      {
        aNb = 0;
      }
    }
  }

  return true;
}

//=======================================================================
// function : Paste
// purpose  : transient -> persistent (store)
//=======================================================================
void XmlMXCAFDoc_GraphNodeDriver::Paste(const occ::handle<TDF_Attribute>& theSource,
                                        XmlObjMgt_Persistent&             theTarget,
                                        XmlObjMgt_SRelocationTable&       theRelocTable) const
{
  occ::handle<XCAFDoc_GraphNode> aS = occ::down_cast<XCAFDoc_GraphNode>(theSource);
  if (aS.IsNull())
  {
    return;
  }

  // graph id
  char                aGuidStr[40];
  Standard_PCharacter pGuidStr;
  //
  pGuidStr = (Standard_PCharacter)aGuidStr;
  aS->ID().ToCString(pGuidStr);
  theTarget.Element().setAttribute(::TreeIdString(), aGuidStr);

  int                            aNb;
  TCollection_AsciiString        aStr;
  occ::handle<XCAFDoc_GraphNode> aF;
  int                            i;

  // fathers
  for (i = 1; i <= aS->NbFathers(); i++)
  {
    aF = aS->GetFather(i);
    if (!aF.IsNull())
    {
      aNb = theRelocTable.FindIndex(aF);
      if (aNb == 0)
      {
        aNb = theRelocTable.Add(aF);
      }
      TCollection_AsciiString aNbStr(aNb);
      aStr += aNbStr + " ";
    }
  }
  if (aStr.Length() > 0)
  {
    theTarget.Element().setAttribute(::FathersString(), aStr.ToCString());
  }

  // children
  aStr.Clear();
  for (i = 1; i <= aS->NbChildren(); i++)
  {
    aF = aS->GetChild(i);
    if (!aF.IsNull())
    {
      aNb = theRelocTable.FindIndex(aF);
      if (aNb == 0)
      {
        aNb = theRelocTable.Add(aF);
      }
      TCollection_AsciiString aNbStr(aNb);
      aStr += aNbStr + " ";
    }
  }
  if (aStr.Length() > 0)
  {
    theTarget.Element().setAttribute(::ChildrenString(), aStr.ToCString());
  }
}
