2016-05-26 00:11:27 -04:00
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Library;
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2016-10-21 22:08:34 -04:00
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using MediaBrowser.Model.Extensions;
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2019-01-13 14:21:32 -05:00
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using MediaBrowser.Model.IO;
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2016-11-04 15:51:59 -04:00
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using MediaBrowser.Model.System;
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using MediaBrowser.Model.Tasks;
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2016-11-03 02:37:52 -04:00
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using MediaBrowser.Model.Threading;
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using Microsoft.Extensions.Logging;
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2016-05-26 00:11:27 -04:00
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2016-11-04 14:56:47 -04:00
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namespace Emby.Server.Implementations.IO
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2016-05-26 00:11:27 -04:00
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{
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public class FileRefresher : IDisposable
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{
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private ILogger Logger { get; set; }
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private ITaskManager TaskManager { get; set; }
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private ILibraryManager LibraryManager { get; set; }
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private IServerConfigurationManager ConfigurationManager { get; set; }
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private readonly IFileSystem _fileSystem;
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private readonly List<string> _affectedPaths = new List<string>();
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private ITimer _timer;
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private readonly ITimerFactory _timerFactory;
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private readonly object _timerLock = new object();
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public string Path { get; private set; }
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public event EventHandler<EventArgs> Completed;
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private readonly IEnvironmentInfo _environmentInfo;
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private readonly ILibraryManager _libraryManager;
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public FileRefresher(string path, IFileSystem fileSystem, IServerConfigurationManager configurationManager, ILibraryManager libraryManager, ITaskManager taskManager, ILogger logger, ITimerFactory timerFactory, IEnvironmentInfo environmentInfo, ILibraryManager libraryManager1)
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{
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logger.LogDebug("New file refresher created for {0}", path);
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Path = path;
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_fileSystem = fileSystem;
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ConfigurationManager = configurationManager;
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LibraryManager = libraryManager;
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TaskManager = taskManager;
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Logger = logger;
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_timerFactory = timerFactory;
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_environmentInfo = environmentInfo;
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_libraryManager = libraryManager1;
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2016-07-02 22:47:39 -04:00
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AddPath(path);
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}
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private void AddAffectedPath(string path)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException(nameof(path));
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}
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if (!_affectedPaths.Contains(path, StringComparer.Ordinal))
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{
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_affectedPaths.Add(path);
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}
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}
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public void AddPath(string path)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException(nameof(path));
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}
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lock (_timerLock)
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{
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AddAffectedPath(path);
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}
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RestartTimer();
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}
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public void RestartTimer()
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{
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if (_disposed)
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{
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return;
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}
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lock (_timerLock)
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{
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if (_disposed)
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{
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return;
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}
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if (_timer == null)
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{
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_timer = _timerFactory.Create(OnTimerCallback, null, TimeSpan.FromSeconds(ConfigurationManager.Configuration.LibraryMonitorDelay), TimeSpan.FromMilliseconds(-1));
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}
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else
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{
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_timer.Change(TimeSpan.FromSeconds(ConfigurationManager.Configuration.LibraryMonitorDelay), TimeSpan.FromMilliseconds(-1));
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}
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}
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}
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public void ResetPath(string path, string affectedFile)
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{
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lock (_timerLock)
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{
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Logger.LogDebug("Resetting file refresher from {0} to {1}", Path, path);
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Path = path;
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AddAffectedPath(path);
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2018-09-12 13:26:21 -04:00
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if (!string.IsNullOrEmpty(affectedFile))
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{
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AddAffectedPath(affectedFile);
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}
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}
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RestartTimer();
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}
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private void OnTimerCallback(object state)
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{
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List<string> paths;
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lock (_timerLock)
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{
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paths = _affectedPaths.ToList();
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}
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Logger.LogDebug("Timer stopped.");
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DisposeTimer();
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Completed?.Invoke(this, EventArgs.Empty);
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try
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{
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ProcessPathChanges(paths.ToList());
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error processing directory changes");
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}
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}
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private void ProcessPathChanges(List<string> paths)
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{
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var itemsToRefresh = paths
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.Distinct(StringComparer.OrdinalIgnoreCase)
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.Select(GetAffectedBaseItem)
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.Where(item => item != null)
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.DistinctBy(i => i.Id)
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.ToList();
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foreach (var item in itemsToRefresh)
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{
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if (item is AggregateFolder)
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{
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continue;
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}
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Logger.LogInformation("{name} ({path}}) will be refreshed.", item.Name, item.Path);
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try
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{
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item.ChangedExternally();
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}
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catch (IOException ex)
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{
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// For now swallow and log.
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// Research item: If an IOException occurs, the item may be in a disconnected state (media unavailable)
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// Should we remove it from it's parent?
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Logger.LogError(ex, "Error refreshing {name}", item.Name);
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error refreshing {name}", item.Name);
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}
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}
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}
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/// <summary>
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/// Gets the affected base item.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <returns>BaseItem.</returns>
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private BaseItem GetAffectedBaseItem(string path)
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{
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BaseItem item = null;
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while (item == null && !string.IsNullOrEmpty(path))
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{
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item = LibraryManager.FindByPath(path, null);
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path = _fileSystem.GetDirectoryName(path);
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}
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if (item != null)
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{
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// If the item has been deleted find the first valid parent that still exists
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while (!_fileSystem.DirectoryExists(item.Path) && !_fileSystem.FileExists(item.Path))
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{
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item = item.GetOwner() ?? item.GetParent();
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if (item == null)
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{
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break;
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}
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}
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}
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return item;
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}
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private void DisposeTimer()
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{
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lock (_timerLock)
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{
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if (_timer != null)
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{
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_timer.Dispose();
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_timer = null;
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2016-05-26 00:11:27 -04:00
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}
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}
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}
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2016-08-10 23:56:01 -04:00
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private bool _disposed;
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public void Dispose()
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{
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_disposed = true;
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DisposeTimer();
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}
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}
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}
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