Source/WebCore/workers/service/NavigationPreloadState.h

/*
 * Copyright (C) 2021 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.
 *
 * 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

#if ENABLE(SERVICE_WORKER)

#include <optional>
#include <wtf/text/WTFString.h>

namespace WebCore {

struct NavigationPreloadState {
    static NavigationPreloadState defaultValue() { return { false, "true"_s }; }

    NavigationPreloadState isolatedCopy() const & { return { enabled, headerValue.isolatedCopy() }; }
    NavigationPreloadState isolatedCopy() && { return { enabled, WTFMove(headerValue).isolatedCopy() }; }

    template<class Encoder> void encode(Encoder& encoder) const { encoder << enabled << headerValue; }
    template<class Decoder> static std::optional<NavigationPreloadState> decode(Decoder&);

    bool enabled { false };
    String headerValue;
};

template<class Decoder>
std::optional<NavigationPreloadState> NavigationPreloadState::decode(Decoder& decoder)
{
    std::optional<bool> enabled;
    decoder >> enabled;
    if (!enabled)
        return { };

    std::optional<String> headerValue;
    decoder >> headerValue;
    if (!headerValue)
        return { };
    return { { *enabled, WTFMove(*headerValue) } };
}

} // namespace WebCore

#endif // ENABLE(SERVICE_WORKER)