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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_METRICS_FEATURE_DISCOVERY_DURATION_REPORTER_IMPL_H_
#define ASH_METRICS_FEATURE_DISCOVERY_DURATION_REPORTER_IMPL_H_
#include <map>
#include "ash/public/cpp/feature_discovery_duration_reporter.h"
#include "ash/public/cpp/session/session_observer.h"
#include "ash/session/session_controller_impl.h"
#include "base/gtest_prod_util.h"
#include "base/scoped_observation.h"
class PrefRegistrySimple;
class PrefService;
namespace base {
class TimeTicks;
}
namespace ash {
class FeatureDiscoveryDurationReporterImpl
: public FeatureDiscoveryDurationReporter,
public SessionObserver {
public:
explicit FeatureDiscoveryDurationReporterImpl(
SessionController* session_controller);
FeatureDiscoveryDurationReporterImpl(
const FeatureDiscoveryDurationReporterImpl&) = delete;
FeatureDiscoveryDurationReporterImpl& operator=(
const FeatureDiscoveryDurationReporterImpl&) = delete;
~FeatureDiscoveryDurationReporterImpl() override;
static void RegisterProfilePrefs(PrefRegistrySimple* registry);
// FeatureDiscoveryDurationReporter:
void MaybeActivateObservation(
feature_discovery::TrackableFeature feature) override;
void MaybeFinishObservation(
feature_discovery::TrackableFeature feature) override;
void AddObserver(ReporterObserver* observer) override;
void RemoveObserver(ReporterObserver* observer) override;
private:
friend class FeatureDiscoveryDurationReporterImplTest;
FRIEND_TEST_ALL_PREFIXES(FeatureDiscoveryDurationReporterBrowserTest,
SaveCumulatedTimeWhenSignout);
// Activates/deactivates the reporter.
void SetActive(bool active);
// Implements activation/deactivation.
void Activate();
void Deactivate();
// SessionObserver:
void OnSessionStateChanged(session_manager::SessionState state) override;
void OnActiveUserPrefServiceChanged(PrefService* pref_service) override;
bool is_active() const { return is_active_; }
base::ObserverList<ReporterObserver> observers_;
// The mappings from trackable feature enum types to observation start
// timestamps. It gets cleared when the reporter is deactivated. New entries
// are added when:
// 1. a new observation starts; or
// 2. unfinished observations resume when the reporter is activated.
std::map<feature_discovery::TrackableFeature, base::TimeTicks>
active_time_recordings_;
// Specifies the pref service whose data is read/written by the reporter. It
// is set when the active user pref service changes.
// NOTE: `active_pref_service_` is not reset when signing out. Because the
// reporter instance should be destroyed in this scenario.
raw_ptr<PrefService> active_pref_service_ = nullptr;
// If true, starting observations on feature discovery is allowed.
bool is_active_ = false;
base::ScopedObservation<SessionController, SessionObserver>
session_controller_observation_{this};
};
} // namespace ash
#endif // ASH_METRICS_FEATURE_DISCOVERY_DURATION_REPORTER_IMPL_H_
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