/*

 * 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.

 */

#ifndef OriginUsageRecord_h

#define OriginUsageRecord_h

#if ENABLE(DATABASE)

#include "PlatformString.h"

#include "StringHash.h"

#include <wtf/HashMap.h>

#include <wtf/HashSet.h>

namespace WebCore {

// Objects of this class can be used from multiple threads with external synchronization.

// String arguments are also supposed to be deeply copied by the caller when necessary.

class OriginUsageRecord : public Noncopyable {

public:

    OriginUsageRecord();

    void addDatabase(const String& identifier, const String& fullPath);

    void removeDatabase(const String& identifier);

    void markDatabase(const String& identifier); // Size may have changed, and will need to be recalculated.

    unsigned long long diskUsage();

private:

    struct DatabaseEntry {

        DatabaseEntry() { }

        DatabaseEntry(const String& filename) : filename(filename) { }

        DatabaseEntry(const String& filename, unsigned long long size) : filename(filename), size(size) { }

        String filename;

        unsigned long long size; // This member remains uninitialized until disk usage is calculated.

    };

    HashMap<String, DatabaseEntry> m_databaseMap;

    HashSet<String> m_unknownSet;

    unsigned long long m_cachedDiskUsage;

    bool m_cachedDiskUsageIsValid;

};

} // namespace WebCore

#endif

#endif