Source/WebKit/Platform/classifier/ResourceLoadStatisticsClassifier.h

/*
 * Copyright (C) 2017-2019 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
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 */

#pragma once

namespace WebCore {
struct ResourceLoadStatistics;
}

namespace WebKit {

enum ResourceLoadPrevalence {
    Low = 1 << 0,
    High = 1 << 1,
    VeryHigh = 1 << 2,
};

class ResourceLoadStatisticsClassifier {
public:
    ResourceLoadStatisticsClassifier() = default;
    virtual ~ResourceLoadStatisticsClassifier() = default;
    ResourceLoadPrevalence calculateResourcePrevalence(const WebCore::ResourceLoadStatistics& resourceStatistic, ResourceLoadPrevalence currentPrevalence);
    ResourceLoadPrevalence calculateResourcePrevalence(unsigned subresourceUnderTopFrameDomainsCount, unsigned subresourceUniqueRedirectsToCount, unsigned subframeUnderTopFrameOriginsCount, unsigned topFrameUniqueRedirectsToCount, ResourceLoadPrevalence currentPrevalence);
protected:
    virtual bool classify(unsigned subresourceUnderTopFrameDomainsCount, unsigned subresourceUniqueRedirectsToCount, unsigned subframeUnderTopFrameOriginsCount)
    {
        return classifyWithVectorThreshold(subresourceUnderTopFrameDomainsCount, subresourceUniqueRedirectsToCount, subframeUnderTopFrameOriginsCount);
    }
    bool classifyWithVectorThreshold(unsigned, unsigned, unsigned);
};

}