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// Copyright 2016 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_NOTIFICATIONS_LOW_DISK_NOTIFICATION_H_
#define CHROME_BROWSER_ASH_NOTIFICATIONS_LOW_DISK_NOTIFICATION_H_
#include <stdint.h>
#include <memory>
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "chromeos/ash/components/dbus/userdataauth/userdataauth_client.h"
namespace message_center {
class Notification;
} // namespace message_center
namespace ash {
// LowDiskNotification manages the notification informing the user of low disk
// space. It is responsible for both creating the notifications in message
// center as well as throttling notifications shown to the user.
// This class should be created after DBus has been initialized and destroyed
// before DBus has been shutdown.
// This class must be instantiated on the UI thread.
class LowDiskNotification : public UserDataAuthClient::Observer {
public:
// Registers this class as the UserDataAuthClient LowDiskSpaceHandler.
LowDiskNotification();
LowDiskNotification(const LowDiskNotification&) = delete;
LowDiskNotification& operator=(const LowDiskNotification&) = delete;
// Resets UserDataAuthClient LowDiskSpaceHandler.
~LowDiskNotification() override;
// Called when the device is running low on disk space. This is responsible
// for deciding whether a notification should be shown or not and showing it
// if appropriate. This must be called from the thread that instantiated this
// object.
void LowDiskSpace(const ::user_data_auth::LowDiskSpace& status) override;
private:
friend class LowDiskNotificationTest;
enum Severity { NONE = -1, MEDIUM = 0, HIGH = 1 };
// Creates a notification for the specified severity. If the severity does
// not match a known value MEDIUM is used by default.
std::unique_ptr<message_center::Notification> CreateNotification(
Severity severity);
// Gets the severity of the low disk status based on the amount of free space
// left on the disk.
Severity GetSeverity(uint64_t free_disk_bytes);
// Sets the minimum time to wait between notifications of the same severity.
// Should only be used in tests.
void SetNotificationIntervalForTest(base::TimeDelta interval);
base::Time last_notification_time_;
Severity last_notification_severity_ = NONE;
base::TimeDelta notification_interval_;
base::ThreadChecker thread_checker_;
base::WeakPtrFactory<LowDiskNotification> weak_ptr_factory_{this};
};
} // namespace ash
#endif // CHROME_BROWSER_ASH_NOTIFICATIONS_LOW_DISK_NOTIFICATION_H_
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