/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
#include "nsMsgRDFUtils.h"
#include "nsIServiceManager.h"
#include "prprf.h"
#include "nsCOMPtr.h"
#include "nsMemory.h"

nsresult createNode(const PRUnichar *str, nsIRDFNode **node, nsIRDFService *rdfService)
{
  nsresult rv;
  nsCOMPtr<nsIRDFLiteral> value;

  NS_ASSERTION(rdfService, "rdfService is null");
  if (!rdfService) return NS_OK;

  if (str) {
    rv = rdfService->GetLiteral(str, getter_AddRefs(value));
  } 
  else {
    rv = rdfService->GetLiteral(EmptyString().get(), getter_AddRefs(value));
  }

  if (NS_SUCCEEDED(rv)) {
    *node = value;
    NS_IF_ADDREF(*node);
  }
  return rv;
}

nsresult createIntNode(PRInt32 value, nsIRDFNode **node, nsIRDFService *rdfService)
{
  *node = nsnull;
  nsresult rv; 
  if (!rdfService) return NS_ERROR_NULL_POINTER;  
  nsCOMPtr<nsIRDFInt> num;
  rv = rdfService->GetIntLiteral(value, getter_AddRefs(num));
  if(NS_SUCCEEDED(rv)) {
    *node = num;
    NS_IF_ADDREF(*node);
  }
  return rv;
}

nsresult createBlobNode(PRUint8 *value, PRUint32 &length, nsIRDFNode **node, nsIRDFService *rdfService)
{
  NS_ENSURE_ARG_POINTER(node);
  NS_ENSURE_ARG_POINTER(rdfService);
  
  *node = nsnull;
  nsCOMPtr<nsIRDFBlob> blob;
  nsresult rv = rdfService->GetBlobLiteral(value, length, getter_AddRefs(blob));
  NS_ENSURE_SUCCESS(rv,rv);
  NS_IF_ADDREF(*node = blob);
  return rv;
}

nsresult GetTargetHasAssertion(nsIRDFDataSource *dataSource, nsIRDFResource* folderResource,
                               nsIRDFResource *property,PRBool tv, nsIRDFNode *target,PRBool* hasAssertion)
{
  NS_ENSURE_ARG_POINTER(hasAssertion);
  
  nsCOMPtr<nsIRDFNode> currentTarget;
  
  nsresult rv = dataSource->GetTarget(folderResource, property,tv, getter_AddRefs(currentTarget));
  if(NS_SUCCEEDED(rv))
  {
    nsCOMPtr<nsIRDFLiteral> value1(do_QueryInterface(target));
    nsCOMPtr<nsIRDFLiteral> value2(do_QueryInterface(currentTarget));
    if(value1 && value2)
      //If the two values are equal then it has this assertion
      *hasAssertion = (value1 == value2);
  }
  else
    rv = NS_NOINTERFACE;
  
  return rv;
  
}

