chrome/browser/safe_browsing/safe_browsing_metrics_collector.cc

// Copyright 2020 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.

#include "chrome/browser/safe_browsing/safe_browsing_metrics_collector.h"

#include "base/logging.h"
#include "base/metrics/histogram_functions.h"
#include "components/prefs/pref_service.h"
#include "components/safe_browsing/core/common/safe_browsing_prefs.h"

namespace {

const int kMetricsLoggingIntervalDay = 1;

}  // namespace

namespace safe_browsing {

SafeBrowsingMetricsCollector::SafeBrowsingMetricsCollector(
    PrefService* pref_service)
    : pref_service_(pref_service) {}

void SafeBrowsingMetricsCollector::StartLogging() {
  base::TimeDelta log_interval =
      base::TimeDelta::FromDays(kMetricsLoggingIntervalDay);
  base::Time last_log_time =
      base::Time::FromDeltaSinceWindowsEpoch(base::TimeDelta::FromSeconds(
          pref_service_->GetInt64(prefs::kSafeBrowsingMetricsLastLogTime)));
  base::TimeDelta delay = base::Time::Now() - last_log_time;
  if (delay >= log_interval) {
    LogMetricsAndScheduleNextLogging();
  } else {
    ScheduleNextLoggingAfterInterval(log_interval - delay);
  }
}

void SafeBrowsingMetricsCollector::LogMetricsAndScheduleNextLogging() {
  base::UmaHistogramEnumeration("SafeBrowsing.Pref.Daily.SafeBrowsingState",
                                GetSafeBrowsingState(*pref_service_));
  base::UmaHistogramBoolean("SafeBrowsing.Pref.Daily.Extended",
                            IsExtendedReportingEnabled(*pref_service_));
  pref_service_->SetInt64(
      prefs::kSafeBrowsingMetricsLastLogTime,
      base::Time::Now().ToDeltaSinceWindowsEpoch().InSeconds());
  ScheduleNextLoggingAfterInterval(
      base::TimeDelta::FromDays(kMetricsLoggingIntervalDay));
}

void SafeBrowsingMetricsCollector::ScheduleNextLoggingAfterInterval(
    base::TimeDelta interval) {
  metrics_collector_timer_.Stop();
  metrics_collector_timer_.Start(
      FROM_HERE, interval, this,
      &SafeBrowsingMetricsCollector::LogMetricsAndScheduleNextLogging);
}

}  // namespace safe_browsing