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using MediaBrowser.Model.Events;
using MediaBrowser.Model.Tasks;
using System;
using System.Threading;
namespace MediaBrowser.Common.ScheduledTasks
{
/// <summary>
/// Represents a task trigger that runs repeatedly on an interval
/// </summary>
public class IntervalTrigger : ITaskTrigger
{
/// <summary>
/// Gets or sets the interval.
/// </summary>
/// <value>The interval.</value>
public TimeSpan Interval { get; set; }
/// <summary>
/// Gets or sets the timer.
/// </summary>
/// <value>The timer.</value>
private Timer Timer { get; set; }
/// <summary>
/// Gets the execution properties of this task.
/// </summary>
/// <value>
/// The execution properties of this task.
/// </value>
public TaskExecutionOptions TaskOptions { get; set; }
/// <summary>
/// Gets or sets the first run delay.
/// </summary>
/// <value>The first run delay.</value>
public TimeSpan FirstRunDelay { get; set; }
public IntervalTrigger()
{
FirstRunDelay = TimeSpan.FromHours(1);
}
/// <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, bool isApplicationStartup)
{
DisposeTimer();
var triggerDate = lastResult != null ?
lastResult.EndTimeUtc.Add(Interval) :
DateTime.UtcNow.Add(FirstRunDelay);
if (DateTime.UtcNow > triggerDate)
{
if (isApplicationStartup)
{
triggerDate = DateTime.UtcNow.AddMinutes(1);
}
else
{
triggerDate = DateTime.UtcNow.AddSeconds(10);
}
}
Timer = new Timer(state => OnTriggered(), null, triggerDate - DateTime.UtcNow, TimeSpan.FromMilliseconds(-1));
}
/// <summary>
/// Stops waiting for the trigger action
/// </summary>
public void Stop()
{
DisposeTimer();
}
/// <summary>
/// Disposes the timer.
/// </summary>
private void DisposeTimer()
{
if (Timer != null)
{
Timer.Dispose();
}
}
/// <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));
}
}
}
}
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