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login_metrics_recorder.h
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login_metrics_recorder.h
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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_METRICS_LOGIN_METRICS_RECORDER_H_
#define ASH_METRICS_LOGIN_METRICS_RECORDER_H_
#include "ash/ash_export.h"
#include "base/macros.h"
namespace ash {
// A metrics recorder that records login authentication related metrics.
// This keeps track of the last authentication method we used and records
// switching between different authentication methods.
// This is tied to UserMetricsRecorder lifetime.
class ASH_EXPORT LoginMetricsRecorder {
public:
// Authentication method to unlock the screen. This enum is used to back an
// UMA histogram and new values should be inserted immediately above
// kMethodCount.
enum class AuthMethod {
kPassword = 0,
kPin,
kSmartlock,
kMethodCount,
};
// The type of switching between auth methods. This enum is used to back an
// UMA histogram and new values should be inserted immediately above
// kSwitchTypeCount.
enum class AuthMethodSwitchType {
kPasswordToPin = 0,
kPasswordToSmartlock,
kPinToPassword,
kPinToSmartlock,
kSmartlockToPin,
kSmartlockToPassword,
kSwitchTypeCount,
};
// User clicks target on the lock screen. This enum is used to back an UMA
// histogram and new values should be inserted immediately above kTargetCount.
enum class LockScreenUserClickTarget {
kShutDownButton = 0,
kRestartButton,
kSignOutButton,
kCloseNoteButton,
kSystemTray,
kVirtualKeyboardTray,
kImeTray,
kNotificationTray,
kLockScreenNoteActionButton,
kTargetCount,
};
// User clicks target on the login screen. This enum is used to back an UMA
// histogram and new values should be inserted immediately above kTargetCount.
enum class LoginScreenUserClickTarget {
kShutDownButton = 0,
kRestartButton,
kBrowseAsGuestButton,
kAddUserButton,
kSystemTray,
kVirtualKeyboardTray,
kImeTray,
kTargetCount,
};
// Helper enumeration for tray related user click targets on login and lock
// screens. Values are translated to UMA histogram enums.
enum class TrayClickTarget {
kSystemTray,
kVirtualKeyboardTray,
kImeTray,
kNotificationTray,
kTrayActionNoteButton,
kTargetCount,
};
// Helper enumeration for shelf buttons user click targets on login and lock
// screens. Values are translated to UMA histogram enums.
enum class ShelfButtonClickTarget {
kShutDownButton,
kRestartButton,
kSignOutButton,
kBrowseAsGuestButton,
kAddUserButton,
kCloseNoteButton,
kCancelButton,
kTargetCount,
};
LoginMetricsRecorder();
~LoginMetricsRecorder();
// Called when user attempts authentication using AuthMethod |type|.
void SetAuthMethod(AuthMethod type);
// Called when lock state changed.
void Reset();
// Used to record UMA stats.
void RecordNumLoginAttempts(int num_attempt, bool success);
void RecordUserTrayClick(TrayClickTarget target);
void RecordUserShelfButtonClick(ShelfButtonClickTarget target);
private:
static AuthMethodSwitchType FindSwitchType(AuthMethod previous,
AuthMethod current);
AuthMethod last_auth_method_ = AuthMethod::kPassword;
DISALLOW_COPY_AND_ASSIGN(LoginMetricsRecorder);
};
} // namespace ash
#endif // ASH_METRICS_LOGIN_METRICS_RECORDER_H_