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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_NOTIFICATIONS_SCHEDULER_PUBLIC_NOTIFICATION_BACKGROUND_TASK_SCHEDULER_H_
#define CHROME_BROWSER_NOTIFICATIONS_SCHEDULER_PUBLIC_NOTIFICATION_BACKGROUND_TASK_SCHEDULER_H_
#include "base/functional/callback.h"
#include "base/time/time.h"
#include "chrome/browser/notifications/scheduler/public/notification_scheduler_types.h"
namespace notifications {
// Interface to schedule a background task on platform OS to run the
// notification scheduler job.
class NotificationBackgroundTaskScheduler {
public:
// Interface used to handle background task events.
class Handler {
public:
using TaskFinishedCallback = base::OnceCallback<void(bool)>;
Handler(const Handler&) = delete;
Handler& operator=(const Handler&) = delete;
// Called when the background task is started.
virtual void OnStartTask(TaskFinishedCallback callback) = 0;
// Called when the background task is stopped by the OS when it wants to
// reallocate resources, our task is not finished yet in this case. The
// handler implementation should explicitly decide whether the task should
// be rescheduled and run later.
virtual void OnStopTask() = 0;
protected:
Handler() = default;
virtual ~Handler() = default;
};
// Schedules a background task in a time window between |window_start| and
// |window_end|. This will update the current background task. Only one
// background task exists for notification scheduler.
virtual void Schedule(base::TimeDelta window_start,
base::TimeDelta window_end) = 0;
// Cancels the background task.
virtual void Cancel() = 0;
NotificationBackgroundTaskScheduler(
const NotificationBackgroundTaskScheduler&) = delete;
NotificationBackgroundTaskScheduler& operator=(
const NotificationBackgroundTaskScheduler&) = delete;
virtual ~NotificationBackgroundTaskScheduler() = default;
protected:
NotificationBackgroundTaskScheduler() = default;
};
} // namespace notifications
#endif // CHROME_BROWSER_NOTIFICATIONS_SCHEDULER_PUBLIC_NOTIFICATION_BACKGROUND_TASK_SCHEDULER_H_
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