/*

 * Copyright (C) 2007 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "ChangeVersionWrapper.h"

#if ENABLE(DATABASE)

#include "Database.h"

#include "SQLError.h"

#include <wtf/PassRefPtr.h>

#include <wtf/RefPtr.h>

namespace WebCore {

ChangeVersionWrapper::ChangeVersionWrapper(const String& oldVersion, const String& newVersion)

    : m_oldVersion(oldVersion.crossThreadString())

    , m_newVersion(newVersion.crossThreadString())

{

}

bool ChangeVersionWrapper::performPreflight(SQLTransaction* transaction)

{

    ASSERT(transaction && transaction->database());

    String actualVersion;

    if (!transaction->database()->getVersionFromDatabase(actualVersion)) {

        LOG_ERROR("Unable to retrieve actual current version from database");

        m_sqlError = SQLError::create(SQLError::UNKNOWN_ERR, "unable to verify current version of database");

        return false;

    }

    if (actualVersion != m_oldVersion) {

        LOG_ERROR("Old version doesn't match actual version");

        m_sqlError = SQLError::create(SQLError::VERSION_ERR, "current version of the database and `oldVersion` argument do not match");

        return false;

    }

    return true;

}

bool ChangeVersionWrapper::performPostflight(SQLTransaction* transaction)

{

    ASSERT(transaction && transaction->database());

    if (!transaction->database()->setVersionInDatabase(m_newVersion)) {

        LOG_ERROR("Unable to set new version in database");

        m_sqlError = SQLError::create(SQLError::UNKNOWN_ERR, "unable to set new version in database");

        return false;

    }

    transaction->database()->setExpectedVersion(m_newVersion);

    return true;

}

} // namespace WebCore

#endif // ENABLE(DATABASE)