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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/power/auto_screen_brightness/metrics_reporter.h"
#include "base/check_op.h"
#include "base/memory/raw_ptr.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "chrome/common/pref_names.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
namespace ash {
namespace power {
namespace auto_screen_brightness {
namespace {
// Interval for asking metrics::DailyEvent to check whether a day has passed.
constexpr base::TimeDelta kCheckDailyEventInternal = base::Seconds(60);
// Prefs corresponding to DeviceClass values.
constexpr std::array<const char*, MetricsReporter::kNumberDeviceClasses>
kDailyCountPrefs = {
prefs::kAutoScreenBrightnessMetricsNoAlsUserAdjustmentCount,
prefs::kAutoScreenBrightnessMetricsSupportedAlsUserAdjustmentCount,
prefs::kAutoScreenBrightnessMetricsUnsupportedAlsUserAdjustmentCount,
prefs::kAutoScreenBrightnessMetricsAtlasUserAdjustmentCount,
prefs::kAutoScreenBrightnessMetricsEveUserAdjustmentCount,
prefs::kAutoScreenBrightnessMetricsNocturneUserAdjustmentCount,
prefs::kAutoScreenBrightnessMetricsKohakuUserAdjustmentCount,
};
// Histograms corresponding to UserAdjustment values.
constexpr std::array<const char*, MetricsReporter::kNumberDeviceClasses>
kDailyCountHistograms = {
MetricsReporter::kNoAlsUserAdjustmentName,
MetricsReporter::kSupportedAlsUserAdjustmentName,
MetricsReporter::kUnsupportedAlsUserAdjustmentName,
MetricsReporter::kAtlasUserAdjustmentName,
MetricsReporter::kEveUserAdjustmentName,
MetricsReporter::kNocturneUserAdjustmentName,
MetricsReporter::kKohakuUserAdjustmentName,
};
} // namespace
constexpr char MetricsReporter::kDailyEventIntervalName[];
constexpr char MetricsReporter::kNoAlsUserAdjustmentName[];
constexpr char MetricsReporter::kSupportedAlsUserAdjustmentName[];
constexpr char MetricsReporter::kUnsupportedAlsUserAdjustmentName[];
constexpr char MetricsReporter::kAtlasUserAdjustmentName[];
constexpr char MetricsReporter::kEveUserAdjustmentName[];
constexpr char MetricsReporter::kNocturneUserAdjustmentName[];
constexpr char MetricsReporter::kKohakuUserAdjustmentName[];
constexpr int MetricsReporter::kNumberDeviceClasses;
// This class is needed since metrics::DailyEvent requires taking ownership
// of its observers. It just forwards events to MetricsReporter.
class MetricsReporter::DailyEventObserver
: public metrics::DailyEvent::Observer {
public:
explicit DailyEventObserver(MetricsReporter* reporter)
: reporter_(reporter) {}
DailyEventObserver(const DailyEventObserver&) = delete;
DailyEventObserver& operator=(const DailyEventObserver&) = delete;
~DailyEventObserver() override = default;
// metrics::DailyEvent::Observer:
void OnDailyEvent(metrics::DailyEvent::IntervalType type) override {
reporter_->ReportDailyMetrics(type);
}
private:
raw_ptr<MetricsReporter> reporter_; // Not owned.
};
void MetricsReporter::RegisterLocalStatePrefs(PrefRegistrySimple* registry) {
metrics::DailyEvent::RegisterPref(
registry, prefs::kAutoScreenBrightnessMetricsDailySample);
for (const char* daily_count_pref : kDailyCountPrefs) {
registry->RegisterIntegerPref(daily_count_pref, 0);
}
}
MetricsReporter::MetricsReporter(
chromeos::PowerManagerClient* power_manager_client,
PrefService* local_state_pref_service)
: pref_service_(local_state_pref_service),
daily_event_(std::make_unique<metrics::DailyEvent>(
pref_service_,
prefs::kAutoScreenBrightnessMetricsDailySample,
kDailyEventIntervalName)) {
for (size_t i = 0; i < kDailyCountPrefs.size(); ++i) {
daily_counts_[i] = pref_service_->GetInteger(kDailyCountPrefs[i]);
}
power_manager_client_observation_.Observe(power_manager_client);
daily_event_->AddObserver(std::make_unique<DailyEventObserver>(this));
daily_event_->CheckInterval();
timer_.Start(FROM_HERE, kCheckDailyEventInternal, daily_event_.get(),
&metrics::DailyEvent::CheckInterval);
}
MetricsReporter::~MetricsReporter() = default;
void MetricsReporter::SuspendDone(base::TimeDelta duration) {
daily_event_->CheckInterval();
}
void MetricsReporter::SetDeviceClass(DeviceClass device_class) {
DCHECK(!device_class_);
device_class_ = device_class;
DCHECK_LT(static_cast<size_t>(device_class), kDailyCountPrefs.size());
}
void MetricsReporter::OnUserBrightnessChangeRequested() {
DCHECK(device_class_);
const size_t index = static_cast<size_t>(*device_class_);
const char* daily_count_pref = kDailyCountPrefs[index];
++daily_counts_[index];
pref_service_->SetInteger(daily_count_pref, daily_counts_[index]);
}
void MetricsReporter::ReportDailyMetricsForTesting(
metrics::DailyEvent::IntervalType type) {
ReportDailyMetrics(type);
}
void MetricsReporter::ReportDailyMetrics(
metrics::DailyEvent::IntervalType type) {
if (!device_class_)
return;
// Don't send metrics on first run or if the clock is changed.
if (type == metrics::DailyEvent::IntervalType::DAY_ELAPSED) {
const size_t index = static_cast<size_t>(*device_class_);
base::UmaHistogramCounts100(kDailyCountHistograms[index],
daily_counts_[index]);
}
for (size_t i = 0; i < kDailyCountPrefs.size(); ++i) {
daily_counts_[i] = 0;
pref_service_->SetInteger(kDailyCountPrefs[i], 0);
}
}
} // namespace auto_screen_brightness
} // namespace power
} // namespace ash
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