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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 CHROME_BROWSER_ASH_APP_MODE_METRICS_LOW_DISK_METRICS_SERVICE_H_
#define CHROME_BROWSER_ASH_APP_MODE_METRICS_LOW_DISK_METRICS_SERVICE_H_
#include "base/memory/raw_ptr.h"
#include "chromeos/ash/components/dbus/userdataauth/userdataauth_client.h"
class PrefService;
namespace ash {
extern const char kKioskLowDiskSeverity[];
extern const char kKioskSessionLowDiskSeverityHistogram[];
extern const char kKioskSessionLowDiskHighestSeverityHistogram[];
extern const uint64_t kLowDiskMediumThreshold;
extern const uint64_t kLowDiskSevereThreshold;
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
// Keep in sync with respective enum in tools/metrics/histograms/enums.xml
enum class KioskLowDiskSeverity {
kNone = 0,
kMedium = 1,
kHigh = 2,
kMaxValue = kHigh,
};
// LowDiskMetricsService tracks and reports severity of low disk notifications.
class LowDiskMetricsService : public UserDataAuthClient::Observer {
public:
explicit LowDiskMetricsService(PrefService& local_state);
LowDiskMetricsService(LowDiskMetricsService&) = delete;
LowDiskMetricsService& operator=(const LowDiskMetricsService&) = delete;
~LowDiskMetricsService() override;
private:
// Called when the device is running low on disk space.
// This is responsible for tracking the severity metrics.
void LowDiskSpace(const ::user_data_auth::LowDiskSpace& status) override;
// Update a low disk severity for the current session.
void UpdateCurrentSessionLowDiskSeverity(KioskLowDiskSeverity severity);
// Report a highest severity of the previous session.
void ReportPreviousSessionLowDiskSeverity();
const raw_ref<PrefService> local_state_;
// The highest low disk notification severity during the session.
KioskLowDiskSeverity low_disk_severity_{KioskLowDiskSeverity::kNone};
};
} // namespace ash
#endif // CHROME_BROWSER_ASH_APP_MODE_METRICS_LOW_DISK_METRICS_SERVICE_H_
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