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// Copyright 2020 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/child_accounts/family_user_chrome_activity_metrics.h"
#include "base/check.h"
#include "base/containers/contains.h"
#include "base/metrics/histogram_functions.h"
#include "base/unguessable_token.h"
#include "chrome/browser/ash/child_accounts/time_limits/app_time_limit_utils.h"
#include "chrome/browser/ash/child_accounts/time_limits/app_types.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
namespace ash {
namespace {
constexpr base::TimeDelta kMinChromeDuration = base::Minutes(1);
constexpr base::TimeDelta kMaxChromeDuration = base::Days(7);
constexpr int kChromeDurationBuckets = 100;
} // namespace
// static
const char FamilyUserChromeActivityMetrics::
kChromeBrowserEngagementDurationHistogramName[] =
"FamilyUser.ChromeBrowserEngagement.Duration2";
// static
void FamilyUserChromeActivityMetrics::RegisterProfilePrefs(
PrefRegistrySimple* registry) {
registry->RegisterTimeDeltaPref(
prefs::kFamilyUserMetricsChromeBrowserEngagementDuration,
base::TimeDelta());
}
FamilyUserChromeActivityMetrics::FamilyUserChromeActivityMetrics(
Profile* profile)
: pref_service_(profile->GetPrefs()), app_service_wrapper_(profile) {
DCHECK(pref_service_);
app_service_wrapper_.AddObserver(this);
UsageTimeStateNotifier::GetInstance()->AddObserver(this);
}
FamilyUserChromeActivityMetrics::~FamilyUserChromeActivityMetrics() {
DCHECK_EQ(base::Time(), active_duration_start_);
app_service_wrapper_.RemoveObserver(this);
UsageTimeStateNotifier::GetInstance()->RemoveObserver(this);
}
void FamilyUserChromeActivityMetrics::OnNewDay() {
base::TimeDelta unreported_duration = pref_service_->GetTimeDelta(
prefs::kFamilyUserMetricsChromeBrowserEngagementDuration);
if (unreported_duration <= base::TimeDelta())
return;
base::UmaHistogramCustomTimes(kChromeBrowserEngagementDurationHistogramName,
unreported_duration, kMinChromeDuration,
kMaxChromeDuration, kChromeDurationBuckets);
pref_service_->ClearPref(
prefs::kFamilyUserMetricsChromeBrowserEngagementDuration);
}
void FamilyUserChromeActivityMetrics::SetActiveSessionStartForTesting(
base::Time time) {
active_duration_start_ = time;
}
void FamilyUserChromeActivityMetrics::OnAppActive(
const app_time::AppId& app_id,
const base::UnguessableToken& instance_id,
base::Time timestamp) {
if (app_id != app_time::GetChromeAppId())
return;
if (active_browser_instances_.empty())
UpdateUserEngagement(/*is_user_active=*/true);
active_browser_instances_.insert(instance_id);
}
void FamilyUserChromeActivityMetrics::OnAppInactive(
const app_time::AppId& app_id,
const base::UnguessableToken& instance_id,
base::Time timestamp) {
if (app_id != app_time::GetChromeAppId())
return;
// OnAppInactive might get called for the same instance multiple times. The
// |instance| might have already been removed from
// |active_browser_instances_|.
if (!base::Contains(active_browser_instances_, instance_id))
return;
active_browser_instances_.erase(instance_id);
if (active_browser_instances_.empty())
UpdateUserEngagement(/*is_user_active=*/false);
}
void FamilyUserChromeActivityMetrics::OnUsageTimeStateChange(
UsageTimeStateNotifier::UsageTimeState state) {
if (active_browser_instances_.empty())
return;
// We should exclude the duration when UsageTimeState is not active and
// `active_browser_instances_` has instance. For example, when screen is off,
// the browser might still be active.
UpdateUserEngagement(state == UsageTimeStateNotifier::UsageTimeState::ACTIVE);
}
void FamilyUserChromeActivityMetrics::UpdateUserEngagement(
bool is_user_active) {
base::Time now = base::Time::Now();
if (is_user_active) {
active_duration_start_ = now;
} else {
if (base::Time() < active_duration_start_ && active_duration_start_ < now) {
base::TimeDelta unreported_duration = pref_service_->GetTimeDelta(
prefs::kFamilyUserMetricsChromeBrowserEngagementDuration);
pref_service_->SetTimeDelta(
prefs::kFamilyUserMetricsChromeBrowserEngagementDuration,
unreported_duration + now - active_duration_start_);
}
active_duration_start_ = base::Time();
}
}
} // namespace ash
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