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/* -*- 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) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Pierre Phaneuf <pp@ludusdesign.com>
 *
 * 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 "nsAbMDBCard.h"

nsAbMDBCard::nsAbMDBCard(void)
{
}

nsAbMDBCard::~nsAbMDBCard(void)
{
}

NS_IMPL_ISUPPORTS_INHERITED0(nsAbMDBCard, nsAbCardProperty)

NS_IMETHODIMP nsAbMDBCard::Equals(nsIAbCard *card, PRBool *result)
{
  if (this == card) {
    *result = PR_TRUE;
    return NS_OK;
  }

  // If we have the same directory, we will equal the other card merely given
  // the row IDs. If not, we are never equal. But we are dumb in that we don't
  // know who our directory is, which may change in the future. For now,
  // however, the only known users of this method are for locating us in a list
  // of cards, most commonly mailing lists; a warning on the IDL has also
  // notified consumers that this method is not generally safe to use. In this
  // respect, it is safe to assume that the directory portion is satisfied when
  // making this call.
  // However, if we make the wrong assumption, one of two things will happen.
  // If the other directory is a local address book, we could return a spurious
  // true result. If not, then DbRowID should be unset and we can definitively
  // return false.

  PRUint32 row;
  nsresult rv = card->GetPropertyAsUint32("DbRowID", &row);
  if (NS_FAILED(rv))
  {
    *result = PR_FALSE;
    return NS_OK;
  }

  PRUint32 ourRow;
  rv = GetPropertyAsUint32("DbRowID", &ourRow);
  NS_ENSURE_SUCCESS(rv, rv);

  *result = (row == ourRow);
  return NS_OK;
}