Source/WebCore/Modules/indexeddb/shared/IDBDatabaseNameAndVersion.h

/*
 * Copyright (C) 2020 Darryl Pogue (darryl@dpogue.ca)
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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.
 */

#pragma once

#include <wtf/text/WTFString.h>

namespace WebCore {

struct IDBDatabaseNameAndVersion {
    String name;
    uint64_t version { 0 };

    template<class Encoder> void encode(Encoder&) const;
    template<class Decoder> static std::optional<IDBDatabaseNameAndVersion> decode(Decoder&);

    IDBDatabaseNameAndVersion isolatedCopy() const & { return { name.isolatedCopy(), version }; }
    IDBDatabaseNameAndVersion isolatedCopy() && { return { WTFMove(name).isolatedCopy(), version }; }
};

template<class Encoder>
void IDBDatabaseNameAndVersion::encode(Encoder& encoder) const
{
    encoder << name << version;
}

template<class Decoder>
std::optional<IDBDatabaseNameAndVersion> IDBDatabaseNameAndVersion::decode(Decoder& decoder)
{
    IDBDatabaseNameAndVersion info;

    if (!decoder.decode(info.name))
        return std::nullopt;

    if (!decoder.decode(info.version))
        return std::nullopt;

    return info;
}

} // namespace WebCore