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// Copyright 2019 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_BATTERY_BATTERY_METRICS_H_
#define CHROME_BROWSER_BATTERY_BATTERY_METRICS_H_
#include <optional>
#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "build/build_config.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/device/public/mojom/battery_monitor.mojom.h"
#include "services/device/public/mojom/battery_status.mojom-forward.h"
// Records metrics around battery usage on all platforms. Connects to
// Battery monitor via mojo.
class BatteryMetrics {
public:
BatteryMetrics();
BatteryMetrics(const BatteryMetrics&) = delete;
BatteryMetrics& operator=(const BatteryMetrics&) = delete;
~BatteryMetrics();
// Allows tests to override how this class binds a BatteryMonitor receiver.
using BatteryMonitorBinder = base::RepeatingCallback<void(
mojo::PendingReceiver<device::mojom::BatteryMonitor>)>;
static void OverrideBatteryMonitorBinderForTesting(
BatteryMonitorBinder binder);
private:
// Start recording UMA for the session/profile.
void StartRecording();
// Calls |QueryNextStatus()| on |battery_monitor_|.
void QueryNextStatus();
// Called when a new BatteryStatus update occurs.
void DidChange(device::mojom::BatteryStatusPtr battery_status);
// Records the drop in battery by percents of total battery.
void RecordBatteryDropUMA(const device::mojom::BatteryStatus& battery_status);
// The battery level at the last time the battery level was recorded. This
// value is updated by the amount of battery drop reported, so may be
// different from the last update by .01.
std::optional<float> last_recorded_battery_level_;
// The battery monitor backend for the device Chrome is running on.
mojo::Remote<device::mojom::BatteryMonitor> battery_monitor_;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<BatteryMetrics> weak_factory_{this};
};
#endif // CHROME_BROWSER_BATTERY_BATTERY_METRICS_H_
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