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// Copyright 2016 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 COMPONENTS_METRICS_DATA_USE_TRACKER_H_
#define COMPONENTS_METRICS_DATA_USE_TRACKER_H_
#include <string>
#include "base/callback.h"
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/sequence_checker.h"
#include "base/time/time.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
namespace metrics {
// Records the data use of user traffic and UMA traffic in user prefs. Taking
// into account those prefs it can verify whether certain UMA log upload is
// allowed.
class DataUseTracker {
public:
explicit DataUseTracker(PrefService* local_state);
virtual ~DataUseTracker();
// Returns an instance of |DataUseTracker| with provided |local_state| if
// users data use should be tracked and null pointer otherwise.
static std::unique_ptr<DataUseTracker> Create(PrefService* local_state);
// Registers data use prefs using provided |registry|.
static void RegisterPrefs(PrefRegistrySimple* registry);
// Updates data usage tracking prefs with the specified values.
static void UpdateMetricsUsagePrefs(int message_size,
bool is_cellular,
bool is_metrics_service_usage,
PrefService* local_state);
// Returns whether a log with provided |log_bytes| can be uploaded according
// to data use ratio and UMA quota provided by variations.
bool ShouldUploadLogOnCellular(int log_bytes);
private:
FRIEND_TEST_ALL_PREFIXES(DataUseTrackerTest, CheckUpdateUsagePref);
FRIEND_TEST_ALL_PREFIXES(DataUseTrackerTest, CheckRemoveExpiredEntries);
FRIEND_TEST_ALL_PREFIXES(DataUseTrackerTest, CheckComputeTotalDataUse);
FRIEND_TEST_ALL_PREFIXES(DataUseTrackerTest, CheckCanUploadUMALog);
// Updates data usage tracking prefs with the specified values.
void UpdateMetricsUsagePrefsInternal(int message_size,
bool is_cellular,
bool is_metrics_service_usage);
// Updates provided |pref_name| for a current date with the given message
// size.
void UpdateUsagePref(const std::string& pref_name, int message_size);
// Removes entries from the all data use prefs.
void RemoveExpiredEntries();
// Removes entries from the given |pref_name| if they are more than 7 days
// old.
void RemoveExpiredEntriesForPref(const std::string& pref_name);
// Computes data usage according to all the entries in the given dictionary
// pref.
int ComputeTotalDataUse(const std::string& pref_name);
// Returns the weekly allowed quota for UMA data use.
virtual bool GetUmaWeeklyQuota(int* uma_weekly_quota_bytes) const;
// Returns the allowed ratio for UMA data use over overall data use.
virtual bool GetUmaRatio(double* ratio) const;
// Returns the current date for measurement.
virtual base::Time GetCurrentMeasurementDate() const;
// Returns the current date as a string with a proper formatting.
virtual std::string GetCurrentMeasurementDateAsString() const;
PrefService* local_state_;
SEQUENCE_CHECKER(sequence_checker_);
DISALLOW_COPY_AND_ASSIGN(DataUseTracker);
};
} // namespace metrics
#endif // COMPONENTS_METRICS_DATA_USE_TRACKER_H_
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