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/*
* Copyright 2018 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef PC_RTC_STATS_TRAVERSAL_H_
#define PC_RTC_STATS_TRAVERSAL_H_
#include <string>
#include <vector>
#include "api/scoped_refptr.h"
#include "api/stats/rtc_stats.h"
#include "api/stats/rtc_stats_report.h"
namespace webrtc {
// Traverses the stats graph, taking all stats objects that are directly or
// indirectly accessible from and including the stats objects identified by
// `ids`, returning them as a new stats report.
// This is meant to be used to implement the stats selection algorithm.
// https://w3c.github.io/webrtc-pc/#dfn-stats-selection-algorithm
scoped_refptr<RTCStatsReport> TakeReferencedStats(
scoped_refptr<RTCStatsReport> report,
const std::vector<std::string>& ids);
// Gets pointers to the string values of any members in `stats` that are used as
// references for looking up other stats objects in the same report by ID. The
// pointers are valid for the lifetime of `stats` assumings its members are not
// modified.
//
// For example, RTCCodecStats contains "transportId"
// (RTCCodecStats::transport_id) referencing an RTCTransportStats.
// https://w3c.github.io/webrtc-stats/#dom-rtccodecstats-transportid
std::vector<const std::string*> GetStatsReferencedIds(const RTCStats& stats);
} // namespace webrtc
#endif // PC_RTC_STATS_TRAVERSAL_H_
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