/*

 * Copyright (C) 2008 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 "OriginUsageRecord.h"

#if ENABLE(DATABASE)

#include "SQLiteFileSystem.h"

namespace WebCore {

OriginUsageRecord::OriginUsageRecord()

    : m_cachedDiskUsageIsValid(false)

{

}

void OriginUsageRecord::addDatabase(const String& identifier, const String& fullPath)

{

    ASSERT(!m_databaseMap.contains(identifier));

    ASSERT_ARG(identifier, identifier.impl()->hasOneRef());

    ASSERT_ARG(fullPath, fullPath.impl()->hasOneRef());

    m_databaseMap.set(identifier, DatabaseEntry(fullPath));

    m_unknownSet.add(identifier);

    m_cachedDiskUsageIsValid = false;

}

void OriginUsageRecord::removeDatabase(const String& identifier)

{

    ASSERT(m_databaseMap.contains(identifier));

    m_databaseMap.remove(identifier);

    m_unknownSet.remove(identifier);

    m_cachedDiskUsageIsValid = false;

}

void OriginUsageRecord::markDatabase(const String& identifier)

{

    ASSERT(m_databaseMap.contains(identifier));

    ASSERT_ARG(identifier, identifier.impl()->hasOneRef());

    m_unknownSet.add(identifier);

    m_cachedDiskUsageIsValid = false;

}

unsigned long long OriginUsageRecord::diskUsage()

{

    // Use the last cached usage value if we have it.

    if (m_cachedDiskUsageIsValid)

        return m_cachedDiskUsage;

    // stat() for the sizes known to be dirty.

    HashSet<String>::iterator iUnknown = m_unknownSet.begin();

    HashSet<String>::iterator endUnknown = m_unknownSet.end();

    for (; iUnknown != endUnknown; ++iUnknown) {

        const String& path = m_databaseMap.get(*iUnknown).filename;

        ASSERT(!path.isEmpty());

        // When we can't determine the file size, we'll just have to assume the file is missing/inaccessible.

        long long size = SQLiteFileSystem::getDatabaseFileSize(path);

        m_databaseMap.set(*iUnknown, DatabaseEntry(path, size));

    }

    m_unknownSet.clear();

    // Recalculate the cached usage value.

    m_cachedDiskUsage = 0;

    HashMap<String, DatabaseEntry>::iterator iDatabase = m_databaseMap.begin();

    HashMap<String, DatabaseEntry>::iterator endDatabase = m_databaseMap.end();

    for (; iDatabase != endDatabase; ++iDatabase)

        m_cachedDiskUsage += iDatabase->second.size;

    m_cachedDiskUsageIsValid = true;

    return m_cachedDiskUsage;

}

}

#endif