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using System;
using System.Collections.Concurrent;
using System.Globalization;
using System.Linq;
using MediaBrowser.Controller.LiveTv;
using MediaBrowser.Model.Events;
using Microsoft.Extensions.Logging;
using MediaBrowser.Model.Serialization;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.LiveTv;
using MediaBrowser.Model.Threading;
namespace Emby.Server.Implementations.LiveTv.EmbyTV
{
public class TimerManager : ItemDataProvider<TimerInfo>
{
private readonly ConcurrentDictionary<string, ITimer> _timers = new ConcurrentDictionary<string, ITimer>(StringComparer.OrdinalIgnoreCase);
private readonly ILogger _logger;
public event EventHandler<GenericEventArgs<TimerInfo>> TimerFired;
private readonly ITimerFactory _timerFactory;
public TimerManager(IFileSystem fileSystem, IJsonSerializer jsonSerializer, ILogger logger, string dataPath, ILogger logger1, ITimerFactory timerFactory)
: base(fileSystem, jsonSerializer, logger, dataPath, (r1, r2) => string.Equals(r1.Id, r2.Id, StringComparison.OrdinalIgnoreCase))
{
_logger = logger1;
_timerFactory = timerFactory;
}
public void RestartTimers()
{
StopTimers();
foreach (var item in GetAll().ToList())
{
AddOrUpdateSystemTimer(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);
AddOrUpdateSystemTimer(item);
}
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);
}
}
public override void Add(TimerInfo item)
{
if (string.IsNullOrEmpty(item.Id))
{
throw new ArgumentException("TimerInfo.Id cannot be null or empty.");
}
base.Add(item);
AddOrUpdateSystemTimer(item);
}
private bool ShouldStartTimer(TimerInfo item)
{
if (item.Status == RecordingStatus.Completed ||
item.Status == RecordingStatus.Cancelled)
{
return false;
}
return true;
}
private void AddOrUpdateSystemTimer(TimerInfo item)
{
StopTimer(item);
if (!ShouldStartTimer(item))
{
return;
}
var startDate = RecordingHelper.GetStartTime(item);
var now = DateTime.UtcNow;
if (startDate < now)
{
TimerFired?.Invoke(this, new GenericEventArgs<TimerInfo> { Argument = item });
return;
}
var dueTime = startDate - now;
StartTimer(item, dueTime);
}
private void StartTimer(TimerInfo item, TimeSpan dueTime)
{
var timer = _timerFactory.Create(TimerCallback, item.Id, dueTime, TimeSpan.Zero);
if (_timers.TryAdd(item.Id, timer))
{
_logger.LogInformation("Creating recording timer for {id}, {name}. Timer will fire in {minutes} minutes", item.Id, item.Name, dueTime.TotalMinutes.ToString(CultureInfo.InvariantCulture));
}
else
{
timer.Dispose();
_logger.LogWarning("Timer already exists for item {id}", item.Id);
}
}
private void StopTimer(TimerInfo item)
{
ITimer 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)
{
TimerFired?.Invoke(this, new GenericEventArgs<TimerInfo> { Argument = timer });
}
}
public TimerInfo GetTimer(string id)
{
return GetAll().FirstOrDefault(r => string.Equals(r.Id, id, StringComparison.OrdinalIgnoreCase));
}
public TimerInfo GetTimerByProgramId(string programId)
{
return GetAll().FirstOrDefault(r => string.Equals(r.ProgramId, programId, StringComparison.OrdinalIgnoreCase));
}
}
}
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