jellyfin/MediaBrowser.Server.Implementations/LiveTv/EmbyTV/TimerManager.cs

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using MediaBrowser.Common.Events;
using MediaBrowser.Controller.LiveTv;
using MediaBrowser.Model.Events;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Serialization;
using System;
using System.Collections.Concurrent;
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using System.Globalization;
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using System.Linq;
using System.Threading;
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using CommonIO;
using MediaBrowser.Model.LiveTv;
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namespace MediaBrowser.Server.Implementations.LiveTv.EmbyTV
{
public class TimerManager : ItemDataProvider<TimerInfo>
{
private readonly ConcurrentDictionary<string, Timer> _timers = new ConcurrentDictionary<string, Timer>(StringComparer.OrdinalIgnoreCase);
private readonly ILogger _logger;
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public event EventHandler<GenericEventArgs<TimerInfo>> TimerFired;
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public TimerManager(IFileSystem fileSystem, IJsonSerializer jsonSerializer, ILogger logger, string dataPath, ILogger logger1)
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: base(fileSystem, jsonSerializer, logger, dataPath, (r1, r2) => string.Equals(r1.Id, r2.Id, StringComparison.OrdinalIgnoreCase))
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{
_logger = logger1;
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}
public void RestartTimers()
{
StopTimers();
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foreach (var item in GetAll().ToList())
{
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AddOrUpdateSystemTimer(item);
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}
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}
public void StopTimers()
{
foreach (var pair in _timers.ToList())
{
pair.Value.Dispose();
}
_timers.Clear();
}
public override void Delete(TimerInfo item)
{
base.Delete(item);
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StopTimer(item);
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}
public override void Update(TimerInfo item)
{
base.Update(item);
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AddOrUpdateSystemTimer(item);
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}
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public void AddOrUpdate(TimerInfo item, bool resetTimer)
{
if (resetTimer)
{
AddOrUpdate(item);
return;
}
var list = GetAll().ToList();
if (!list.Any(i => EqualityComparer(i, item)))
{
base.Add(item);
}
else
{
base.Update(item);
}
}
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public override void Add(TimerInfo item)
{
if (string.IsNullOrWhiteSpace(item.Id))
{
throw new ArgumentException("TimerInfo.Id cannot be null or empty.");
}
base.Add(item);
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AddOrUpdateSystemTimer(item);
}
private bool ShouldStartTimer(TimerInfo item)
{
if (item.Status == RecordingStatus.Completed ||
item.Status == RecordingStatus.Cancelled)
{
return false;
}
return true;
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}
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private void AddOrUpdateSystemTimer(TimerInfo item)
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{
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StopTimer(item);
if (!ShouldStartTimer(item))
{
return;
}
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var startDate = RecordingHelper.GetStartTime(item);
var now = DateTime.UtcNow;
if (startDate < now)
{
EventHelper.FireEventIfNotNull(TimerFired, this, new GenericEventArgs<TimerInfo> { Argument = item }, Logger);
return;
}
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var dueTime = startDate - now;
StartTimer(item, dueTime);
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}
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private void StartTimer(TimerInfo item, TimeSpan dueTime)
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{
var timer = new Timer(TimerCallback, item.Id, dueTime, TimeSpan.Zero);
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if (_timers.TryAdd(item.Id, timer))
{
_logger.Info("Creating recording timer for {0}, {1}. Timer will fire in {2} minutes", item.Id, item.Name, dueTime.TotalMinutes.ToString(CultureInfo.InvariantCulture));
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}
else
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{
timer.Dispose();
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_logger.Warn("Timer already exists for item {0}", item.Id);
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}
}
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private void StopTimer(TimerInfo item)
{
Timer timer;
if (_timers.TryRemove(item.Id, out timer))
{
timer.Dispose();
}
}
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private void TimerCallback(object state)
{
var timerId = (string)state;
var timer = GetAll().FirstOrDefault(i => string.Equals(i.Id, timerId, StringComparison.OrdinalIgnoreCase));
if (timer != null)
{
EventHelper.FireEventIfNotNull(TimerFired, this, new GenericEventArgs<TimerInfo> { Argument = timer }, Logger);
}
}
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public TimerInfo GetTimer(string id)
{
return GetAll().FirstOrDefault(r => string.Equals(r.Id, id, StringComparison.OrdinalIgnoreCase));
}
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}
}