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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;
using System.Linq;
using System.Threading;
namespace MediaBrowser.Server.Implementations.LiveTv.EmbyTV
{
public class TimerManager : ItemDataProvider<TimerInfo>
{
private readonly ConcurrentDictionary<string, Timer> _timers = new ConcurrentDictionary<string, Timer>(StringComparer.OrdinalIgnoreCase);
public event EventHandler<GenericEventArgs<TimerInfo>> TimerFired;
public TimerManager(IJsonSerializer jsonSerializer, ILogger logger, string dataPath)
: base(jsonSerializer, logger, dataPath, (r1, r2) => string.Equals(r1.Id, r2.Id, StringComparison.OrdinalIgnoreCase))
{
}
public void RestartTimers()
{
StopTimers();
foreach (var item in GetAll().ToList())
{
AddTimer(item);
}
}
public void StopTimers()
{
foreach (var pair in _timers.ToList())
{
pair.Value.Dispose();
}
_timers.Clear();
}
public override void Delete(TimerInfo item)
{
base.Delete(item);
StopTimer(item);
}
public override void Update(TimerInfo item)
{
base.Update(item);
Timer timer;
if (_timers.TryGetValue(item.Id, out timer))
{
var timespan = RecordingHelper.GetStartTime(item) - DateTime.UtcNow;
timer.Change(timespan, TimeSpan.Zero);
}
else
{
AddTimer(item);
}
}
public override void Add(TimerInfo item)
{
if (string.IsNullOrWhiteSpace(item.Id))
{
throw new ArgumentException("TimerInfo.Id cannot be null or empty.");
}
base.Add(item);
AddTimer(item);
}
public void AddOrUpdate(TimerInfo item)
{
var list = GetAll().ToList();
if (!list.Any(i => EqualityComparer(i, item)))
{
Add(item);
}
else
{
Update(item);
}
}
private void AddTimer(TimerInfo item)
{
var startDate = RecordingHelper.GetStartTime(item);
var now = DateTime.UtcNow;
if (startDate < now)
{
EventHelper.FireEventIfNotNull(TimerFired, this, new GenericEventArgs<TimerInfo> { Argument = item }, Logger);
return;
}
var timerLength = startDate - now;
StartTimer(item, timerLength);
}
public void StartTimer(TimerInfo item, TimeSpan length)
{
StopTimer(item);
var timer = new Timer(TimerCallback, item.Id, length, TimeSpan.Zero);
if (!_timers.TryAdd(item.Id, timer))
{
timer.Dispose();
}
}
private void StopTimer(TimerInfo item)
{
Timer timer;
if (_timers.TryRemove(item.Id, out timer))
{
timer.Dispose();
}
}
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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