chromium/net/nqe/network_qualities_prefs_manager.cc

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "net/nqe/network_qualities_prefs_manager.h"

#include <optional>
#include <string>
#include <utility>

#include "base/functional/bind.h"
#include "base/metrics/histogram_macros_local.h"
#include "base/rand_util.h"
#include "base/task/sequenced_task_runner.h"
#include "net/nqe/network_quality_estimator.h"

namespace net {

namespace {

// Maximum size of the prefs that hold the qualities of different networks.
// A single entry in the cache consists of three tuples:
// (i)   SSID or MCCMNC of the network. SSID is at most 32 characters in length
//       (but is typically shorter than that). MCCMNC is at most 6 characters
//       long.
// (ii)  Connection type of the network as reported by network
//       change notifier (an enum).
// (iii) Effective connection type of the network (an enum).
constexpr size_t kMaxCacheSize = …;

// Parses |value| into a map of NetworkIDs and CachedNetworkQualities,
// and returns the map.
ParsedPrefs ConvertDictionaryValueToMap(const base::Value::Dict& value) { … }

}  // namespace

NetworkQualitiesPrefsManager::NetworkQualitiesPrefsManager(
    std::unique_ptr<PrefDelegate> pref_delegate)
    : … { … }

NetworkQualitiesPrefsManager::~NetworkQualitiesPrefsManager() { … }

void NetworkQualitiesPrefsManager::InitializeOnNetworkThread(
    NetworkQualityEstimator* network_quality_estimator) { … }

void NetworkQualitiesPrefsManager::ShutdownOnPrefSequence() { … }

void NetworkQualitiesPrefsManager::ClearPrefs() { … }

void NetworkQualitiesPrefsManager::OnChangeInCachedNetworkQuality(
    const nqe::internal::NetworkID& network_id,
    const nqe::internal::CachedNetworkQuality& cached_network_quality) { … }

ParsedPrefs NetworkQualitiesPrefsManager::ForceReadPrefsForTesting() const { … }

}  // namespace net