jellyfin/Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs
2017-08-19 15:43:35 -04:00

452 lines
17 KiB
C#

using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Plugins;
using MediaBrowser.Controller.Session;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Threading;
using MediaBrowser.Controller.Channels;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.Entities.TV;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Events;
using MediaBrowser.Model.Extensions;
using MediaBrowser.Model.Threading;
namespace Emby.Server.Implementations.EntryPoints
{
public class LibraryChangedNotifier : IServerEntryPoint
{
/// <summary>
/// The _library manager
/// </summary>
private readonly ILibraryManager _libraryManager;
private readonly ISessionManager _sessionManager;
private readonly IUserManager _userManager;
private readonly ILogger _logger;
private readonly ITimerFactory _timerFactory;
/// <summary>
/// The _library changed sync lock
/// </summary>
private readonly object _libraryChangedSyncLock = new object();
private readonly List<Folder> _foldersAddedTo = new List<Folder>();
private readonly List<Folder> _foldersRemovedFrom = new List<Folder>();
private readonly List<BaseItem> _itemsAdded = new List<BaseItem>();
private readonly List<BaseItem> _itemsRemoved = new List<BaseItem>();
private readonly List<BaseItem> _itemsUpdated = new List<BaseItem>();
/// <summary>
/// Gets or sets the library update timer.
/// </summary>
/// <value>The library update timer.</value>
private ITimer LibraryUpdateTimer { get; set; }
/// <summary>
/// The library update duration
/// </summary>
private const int LibraryUpdateDuration = 5000;
private readonly IProviderManager _providerManager;
public LibraryChangedNotifier(ILibraryManager libraryManager, ISessionManager sessionManager, IUserManager userManager, ILogger logger, ITimerFactory timerFactory, IProviderManager providerManager)
{
_libraryManager = libraryManager;
_sessionManager = sessionManager;
_userManager = userManager;
_logger = logger;
_timerFactory = timerFactory;
_providerManager = providerManager;
}
public void Run()
{
_libraryManager.ItemAdded += libraryManager_ItemAdded;
_libraryManager.ItemUpdated += libraryManager_ItemUpdated;
_libraryManager.ItemRemoved += libraryManager_ItemRemoved;
_providerManager.RefreshCompleted += _providerManager_RefreshCompleted;
_providerManager.RefreshStarted += _providerManager_RefreshStarted;
_providerManager.RefreshProgress += _providerManager_RefreshProgress;
}
private Dictionary<Guid, DateTime> _lastProgressMessageTimes = new Dictionary<Guid, DateTime>();
private void _providerManager_RefreshProgress(object sender, GenericEventArgs<Tuple<BaseItem, double>> e)
{
var item = e.Argument.Item1;
if (!EnableRefreshMessage(item))
{
return;
}
var progress = e.Argument.Item2;
DateTime lastMessageSendTime;
if (_lastProgressMessageTimes.TryGetValue(item.Id, out lastMessageSendTime))
{
if (progress > 0 && progress < 100 && (DateTime.UtcNow - lastMessageSendTime).TotalMilliseconds < 1000)
{
return;
}
}
_lastProgressMessageTimes[item.Id] = DateTime.UtcNow;
var dict = new Dictionary<string, string>();
dict["ItemId"] = item.Id.ToString("N");
dict["Progress"] = progress.ToString(CultureInfo.InvariantCulture);
try
{
_sessionManager.SendMessageToAdminSessions("RefreshProgress", dict, CancellationToken.None);
}
catch
{
}
var collectionFolders = _libraryManager.GetCollectionFolders(item).ToList();
foreach (var collectionFolder in collectionFolders)
{
var collectionFolderDict = new Dictionary<string, string>();
collectionFolderDict["ItemId"] = collectionFolder.Id.ToString("N");
collectionFolderDict["Progress"] = (collectionFolder.GetRefreshProgress() ?? 0).ToString(CultureInfo.InvariantCulture);
try
{
_sessionManager.SendMessageToAdminSessions("RefreshProgress", collectionFolderDict, CancellationToken.None);
}
catch
{
}
}
}
private void _providerManager_RefreshStarted(object sender, GenericEventArgs<BaseItem> e)
{
_providerManager_RefreshProgress(sender, new GenericEventArgs<Tuple<BaseItem, double>>(new Tuple<BaseItem, double>(e.Argument, 0)));
}
private void _providerManager_RefreshCompleted(object sender, GenericEventArgs<BaseItem> e)
{
_providerManager_RefreshProgress(sender, new GenericEventArgs<Tuple<BaseItem, double>>(new Tuple<BaseItem, double>(e.Argument, 100)));
}
private bool EnableRefreshMessage(BaseItem item)
{
var folder = item as Folder;
if (folder == null)
{
return false;
}
if (folder.IsRoot)
{
return false;
}
if (folder is AggregateFolder || folder is UserRootFolder)
{
return false;
}
if (folder is UserView || folder is Channel)
{
return false;
}
if (!folder.IsTopParent)
{
return false;
}
return true;
}
/// <summary>
/// Handles the ItemAdded event of the libraryManager control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="ItemChangeEventArgs"/> instance containing the event data.</param>
void libraryManager_ItemAdded(object sender, ItemChangeEventArgs e)
{
if (!FilterItem(e.Item))
{
return;
}
lock (_libraryChangedSyncLock)
{
if (LibraryUpdateTimer == null)
{
LibraryUpdateTimer = _timerFactory.Create(LibraryUpdateTimerCallback, null, LibraryUpdateDuration,
Timeout.Infinite);
}
else
{
LibraryUpdateTimer.Change(LibraryUpdateDuration, Timeout.Infinite);
}
if (e.Item.Parent != null)
{
_foldersAddedTo.Add(e.Item.Parent);
}
_itemsAdded.Add(e.Item);
}
}
/// <summary>
/// Handles the ItemUpdated event of the libraryManager control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="ItemChangeEventArgs"/> instance containing the event data.</param>
void libraryManager_ItemUpdated(object sender, ItemChangeEventArgs e)
{
if (!FilterItem(e.Item))
{
return;
}
lock (_libraryChangedSyncLock)
{
if (LibraryUpdateTimer == null)
{
LibraryUpdateTimer = _timerFactory.Create(LibraryUpdateTimerCallback, null, LibraryUpdateDuration,
Timeout.Infinite);
}
else
{
LibraryUpdateTimer.Change(LibraryUpdateDuration, Timeout.Infinite);
}
_itemsUpdated.Add(e.Item);
}
}
/// <summary>
/// Handles the ItemRemoved event of the libraryManager control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="ItemChangeEventArgs"/> instance containing the event data.</param>
void libraryManager_ItemRemoved(object sender, ItemChangeEventArgs e)
{
if (!FilterItem(e.Item))
{
return;
}
lock (_libraryChangedSyncLock)
{
if (LibraryUpdateTimer == null)
{
LibraryUpdateTimer = _timerFactory.Create(LibraryUpdateTimerCallback, null, LibraryUpdateDuration,
Timeout.Infinite);
}
else
{
LibraryUpdateTimer.Change(LibraryUpdateDuration, Timeout.Infinite);
}
if (e.Item.Parent != null)
{
_foldersRemovedFrom.Add(e.Item.Parent);
}
_itemsRemoved.Add(e.Item);
}
}
/// <summary>
/// Libraries the update timer callback.
/// </summary>
/// <param name="state">The state.</param>
private void LibraryUpdateTimerCallback(object state)
{
lock (_libraryChangedSyncLock)
{
// Remove dupes in case some were saved multiple times
var foldersAddedTo = _foldersAddedTo.DistinctBy(i => i.Id).ToList();
var foldersRemovedFrom = _foldersRemovedFrom.DistinctBy(i => i.Id).ToList();
var itemsUpdated = _itemsUpdated
.Where(i => !_itemsAdded.Contains(i))
.DistinctBy(i => i.Id)
.ToList();
SendChangeNotifications(_itemsAdded.ToList(), itemsUpdated, _itemsRemoved.ToList(), foldersAddedTo, foldersRemovedFrom, CancellationToken.None);
if (LibraryUpdateTimer != null)
{
LibraryUpdateTimer.Dispose();
LibraryUpdateTimer = null;
}
_itemsAdded.Clear();
_itemsRemoved.Clear();
_itemsUpdated.Clear();
_foldersAddedTo.Clear();
_foldersRemovedFrom.Clear();
}
}
/// <summary>
/// Sends the change notifications.
/// </summary>
/// <param name="itemsAdded">The items added.</param>
/// <param name="itemsUpdated">The items updated.</param>
/// <param name="itemsRemoved">The items removed.</param>
/// <param name="foldersAddedTo">The folders added to.</param>
/// <param name="foldersRemovedFrom">The folders removed from.</param>
/// <param name="cancellationToken">The cancellation token.</param>
private async void SendChangeNotifications(List<BaseItem> itemsAdded, List<BaseItem> itemsUpdated, List<BaseItem> itemsRemoved, List<Folder> foldersAddedTo, List<Folder> foldersRemovedFrom, CancellationToken cancellationToken)
{
foreach (var user in _userManager.Users.ToList())
{
var id = user.Id;
var userSessions = _sessionManager.Sessions
.Where(u => u.UserId.HasValue && u.UserId.Value == id && u.SessionController != null && u.IsActive)
.ToList();
if (userSessions.Count > 0)
{
LibraryUpdateInfo info;
try
{
info = GetLibraryUpdateInfo(itemsAdded, itemsUpdated, itemsRemoved, foldersAddedTo,
foldersRemovedFrom, id);
}
catch (Exception ex)
{
_logger.ErrorException("Error in GetLibraryUpdateInfo", ex);
return;
}
foreach (var userSession in userSessions)
{
try
{
await userSession.SessionController.SendLibraryUpdateInfo(info, cancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.ErrorException("Error sending LibraryChanged message", ex);
}
}
}
}
}
/// <summary>
/// Gets the library update info.
/// </summary>
/// <param name="itemsAdded">The items added.</param>
/// <param name="itemsUpdated">The items updated.</param>
/// <param name="itemsRemoved">The items removed.</param>
/// <param name="foldersAddedTo">The folders added to.</param>
/// <param name="foldersRemovedFrom">The folders removed from.</param>
/// <param name="userId">The user id.</param>
/// <returns>LibraryUpdateInfo.</returns>
private LibraryUpdateInfo GetLibraryUpdateInfo(IEnumerable<BaseItem> itemsAdded, IEnumerable<BaseItem> itemsUpdated, IEnumerable<BaseItem> itemsRemoved, IEnumerable<Folder> foldersAddedTo, IEnumerable<Folder> foldersRemovedFrom, Guid userId)
{
var user = _userManager.GetUserById(userId);
return new LibraryUpdateInfo
{
ItemsAdded = itemsAdded.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user)).Select(i => i.Id.ToString("N")).Distinct().ToArray(),
ItemsUpdated = itemsUpdated.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user)).Select(i => i.Id.ToString("N")).Distinct().ToArray(),
ItemsRemoved = itemsRemoved.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user, true)).Select(i => i.Id.ToString("N")).Distinct().ToArray(),
FoldersAddedTo = foldersAddedTo.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user)).Select(i => i.Id.ToString("N")).Distinct().ToArray(),
FoldersRemovedFrom = foldersRemovedFrom.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user)).Select(i => i.Id.ToString("N")).Distinct().ToArray()
};
}
private bool FilterItem(BaseItem item)
{
if (!item.IsFolder && item.LocationType == LocationType.Virtual)
{
return false;
}
if (item is IItemByName && !(item is MusicArtist))
{
return false;
}
return item.SourceType == SourceType.Library;
}
/// <summary>
/// Translates the physical item to user library.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="item">The item.</param>
/// <param name="user">The user.</param>
/// <param name="includeIfNotFound">if set to <c>true</c> [include if not found].</param>
/// <returns>IEnumerable{``0}.</returns>
private IEnumerable<T> TranslatePhysicalItemToUserLibrary<T>(T item, User user, bool includeIfNotFound = false)
where T : BaseItem
{
// If the physical root changed, return the user root
if (item is AggregateFolder)
{
return new[] { user.RootFolder as T };
}
// Return it only if it's in the user's library
if (includeIfNotFound || item.IsVisibleStandalone(user))
{
return new[] { item };
}
return new T[] { };
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
Dispose(true);
}
/// <summary>
/// Releases unmanaged and - optionally - managed resources.
/// </summary>
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected virtual void Dispose(bool dispose)
{
if (dispose)
{
if (LibraryUpdateTimer != null)
{
LibraryUpdateTimer.Dispose();
LibraryUpdateTimer = null;
}
_libraryManager.ItemAdded -= libraryManager_ItemAdded;
_libraryManager.ItemUpdated -= libraryManager_ItemUpdated;
_libraryManager.ItemRemoved -= libraryManager_ItemRemoved;
}
}
}
}