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using System;
using System.Threading;
using MediaBrowser.Model.Tasks;
using Microsoft.Extensions.Logging;
namespace Emby.Server.Implementations.ScheduledTasks.Triggers;
/// <summary>
/// Represents a task trigger that fires everyday.
/// </summary>
public sealed class DailyTrigger : ITaskTrigger, IDisposable
{
private readonly TimeSpan _timeOfDay;
private Timer? _timer;
private bool _disposed;
/// <summary>
/// Initializes a new instance of the <see cref="DailyTrigger"/> class.
/// </summary>
/// <param name="timeOfDay">The time of day to trigger the task to run.</param>
/// <param name="taskOptions">The options of this task.</param>
public DailyTrigger(TimeSpan timeOfDay, TaskOptions taskOptions)
{
_timeOfDay = timeOfDay;
TaskOptions = taskOptions;
}
/// <inheritdoc />
public event EventHandler<EventArgs>? Triggered;
/// <inheritdoc />
public TaskOptions TaskOptions { get; }
/// <inheritdoc />
public void Start(TaskResult? lastResult, ILogger logger, string taskName, bool isApplicationStartup)
{
DisposeTimer();
var now = DateTime.Now;
var triggerDate = now.TimeOfDay > _timeOfDay ? now.Date.AddDays(1) : now.Date;
triggerDate = triggerDate.Add(_timeOfDay);
var dueTime = triggerDate - now;
logger.LogInformation("Daily trigger for {Task} set to fire at {TriggerDate:yyyy-MM-dd HH:mm:ss.fff zzz}, which is {DueTime:c} from now.", taskName, triggerDate, dueTime);
_timer = new Timer(_ => OnTriggered(), null, dueTime, TimeSpan.FromMilliseconds(-1));
}
/// <inheritdoc />
public void Stop()
{
DisposeTimer();
}
/// <summary>
/// Disposes the timer.
/// </summary>
private void DisposeTimer()
{
_timer?.Dispose();
_timer = null;
}
/// <summary>
/// Called when [triggered].
/// </summary>
private void OnTriggered()
{
Triggered?.Invoke(this, EventArgs.Empty);
}
/// <inheritdoc />
public void Dispose()
{
if (_disposed)
{
return;
}
DisposeTimer();
_disposed = true;
}
}
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