jellyfin/Emby.Common.Implementations/ScheduledTasks/SystemEventTrigger.cs

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2016-10-28 22:40:15 -07:00
using System;
using System.Threading.Tasks;
using MediaBrowser.Model.Events;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.System;
using MediaBrowser.Model.Tasks;
namespace Emby.Common.Implementations.ScheduledTasks
{
/// <summary>
/// Class SystemEventTrigger
/// </summary>
public class SystemEventTrigger : ITaskTrigger
{
/// <summary>
/// Gets or sets the system event.
/// </summary>
/// <value>The system event.</value>
public SystemEvent SystemEvent { get; set; }
/// <summary>
/// Gets the execution properties of this task.
/// </summary>
/// <value>
/// The execution properties of this task.
/// </value>
public TaskExecutionOptions TaskOptions { get; set; }
private readonly ISystemEvents _systemEvents;
public SystemEventTrigger(ISystemEvents systemEvents)
{
_systemEvents = systemEvents;
}
/// <summary>
/// Stars waiting for the trigger action
/// </summary>
/// <param name="lastResult">The last result.</param>
/// <param name="isApplicationStartup">if set to <c>true</c> [is application startup].</param>
public void Start(TaskResult lastResult, ILogger logger, string taskName, bool isApplicationStartup)
{
switch (SystemEvent)
{
case SystemEvent.WakeFromSleep:
_systemEvents.Resume += _systemEvents_Resume;
break;
}
}
private async void _systemEvents_Resume(object sender, EventArgs e)
{
if (SystemEvent == SystemEvent.WakeFromSleep)
{
// This value is a bit arbitrary, but add a delay to help ensure network connections have been restored before running the task
await Task.Delay(10000).ConfigureAwait(false);
OnTriggered();
}
}
/// <summary>
/// Stops waiting for the trigger action
/// </summary>
public void Stop()
{
_systemEvents.Resume -= _systemEvents_Resume;
}
/// <summary>
/// Occurs when [triggered].
/// </summary>
public event EventHandler<GenericEventArgs<TaskExecutionOptions>> Triggered;
/// <summary>
/// Called when [triggered].
/// </summary>
private void OnTriggered()
{
if (Triggered != null)
{
Triggered(this, new GenericEventArgs<TaskExecutionOptions>(TaskOptions));
}
}
}
}