jellyfin/MediaBrowser.Common/ScheduledTasks/WeeklyTrigger.cs
2013-02-20 20:33:05 -05:00

102 lines
2.8 KiB
C#

using System;
using System.Threading;
namespace MediaBrowser.Common.ScheduledTasks
{
/// <summary>
/// Represents a task trigger that fires on a weekly basis
/// </summary>
public class WeeklyTrigger : BaseTaskTrigger
{
/// <summary>
/// Get the time of day to trigger the task to run
/// </summary>
/// <value>The time of day.</value>
public TimeSpan TimeOfDay { get; set; }
/// <summary>
/// Gets or sets the day of week.
/// </summary>
/// <value>The day of week.</value>
public DayOfWeek DayOfWeek { get; set; }
/// <summary>
/// Gets or sets the timer.
/// </summary>
/// <value>The timer.</value>
private Timer Timer { get; set; }
/// <summary>
/// Stars waiting for the trigger action
/// </summary>
protected internal override void Start()
{
DisposeTimer();
var triggerDate = GetNextTriggerDateTime();
Timer = new Timer(state => OnTriggered(), null, triggerDate - DateTime.Now, TimeSpan.FromMilliseconds(-1));
}
/// <summary>
/// Gets the next trigger date time.
/// </summary>
/// <returns>DateTime.</returns>
private DateTime GetNextTriggerDateTime()
{
var now = DateTime.Now;
// If it's on the same day
if (now.DayOfWeek == DayOfWeek)
{
// It's either later today, or a week from now
return now.TimeOfDay < TimeOfDay ? now.Date.Add(TimeOfDay) : now.Date.AddDays(7).Add(TimeOfDay);
}
var triggerDate = now.Date;
// Walk the date forward until we get to the trigger day
while (triggerDate.DayOfWeek != DayOfWeek)
{
triggerDate = triggerDate.AddDays(1);
}
// Return the trigger date plus the time offset
return triggerDate.Add(TimeOfDay);
}
/// <summary>
/// Stops waiting for the trigger action
/// </summary>
protected internal override void Stop()
{
DisposeTimer();
}
/// <summary>
/// Disposes this instance.
/// </summary>
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected override void Dispose(bool dispose)
{
if (dispose)
{
DisposeTimer();
}
base.Dispose(dispose);
}
/// <summary>
/// Disposes the timer.
/// </summary>
private void DisposeTimer()
{
if (Timer != null)
{
Timer.Dispose();
}
}
}
}