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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_NQE_EVENT_CREATOR_H_
#define NET_NQE_EVENT_CREATOR_H_
#include <stdint.h>
#include "base/sequence_checker.h"
#include "net/base/net_export.h"
#include "net/log/net_log_with_source.h"
#include "net/nqe/effective_connection_type.h"
#include "net/nqe/network_quality.h"
namespace net {
class NetLogWithSource;
namespace nqe {
namespace internal {
// Class that adds net log events for network quality estimator.
class NET_EXPORT_PRIVATE EventCreator {
public:
explicit EventCreator(NetLogWithSource net_log);
EventCreator(const EventCreator&) = delete;
EventCreator& operator=(const EventCreator&) = delete;
~EventCreator();
// May add network quality changed event to the net-internals log if there
// is a change in the effective connection type, or if there is a meaningful
// change in the values of HTTP RTT, transport RTT or bandwidth.
// |effective_connection_type| is the current effective connection type.
// |network_quality| is the current network quality.
void MaybeAddNetworkQualityChangedEventToNetLog(
EffectiveConnectionType effective_connection_type,
const NetworkQuality& network_quality);
private:
NetLogWithSource net_log_;
// The effective connection type when the net log event was last added.
EffectiveConnectionType past_effective_connection_type_ =
EFFECTIVE_CONNECTION_TYPE_UNKNOWN;
// The network quality when the net log event was last added.
NetworkQuality past_network_quality_;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace internal
} // namespace nqe
} // namespace net
#endif // NET_NQE_EVENT_CREATOR_H_
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