403 lines
14 KiB
C#
403 lines
14 KiB
C#
using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using Jellyfin.Data.Entities;
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using Jellyfin.Data.Events;
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using Jellyfin.Extensions;
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using MediaBrowser.Controller.Channels;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Entities.Audio;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Providers;
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using MediaBrowser.Controller.Session;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Session;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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namespace Emby.Server.Implementations.EntryPoints;
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/// <summary>
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/// A <see cref="IHostedService"/> responsible for notifying users when libraries are updated.
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/// </summary>
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public sealed class LibraryChangedNotifier : IHostedService, IDisposable
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{
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private readonly ILibraryManager _libraryManager;
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private readonly IServerConfigurationManager _configurationManager;
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private readonly IProviderManager _providerManager;
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private readonly ISessionManager _sessionManager;
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private readonly IUserManager _userManager;
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private readonly ILogger<LibraryChangedNotifier> _logger;
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private readonly object _libraryChangedSyncLock = new();
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private readonly List<Folder> _foldersAddedTo = new();
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private readonly List<Folder> _foldersRemovedFrom = new();
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private readonly List<BaseItem> _itemsAdded = new();
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private readonly List<BaseItem> _itemsRemoved = new();
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private readonly List<BaseItem> _itemsUpdated = new();
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private readonly ConcurrentDictionary<Guid, DateTime> _lastProgressMessageTimes = new();
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private Timer? _libraryUpdateTimer;
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/// <summary>
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/// Initializes a new instance of the <see cref="LibraryChangedNotifier"/> class.
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/// </summary>
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/// <param name="libraryManager">The <see cref="ILibraryManager"/>.</param>
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/// <param name="configurationManager">The <see cref="IServerConfigurationManager"/>.</param>
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/// <param name="sessionManager">The <see cref="ISessionManager"/>.</param>
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/// <param name="userManager">The <see cref="IUserManager"/>.</param>
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/// <param name="logger">The <see cref="ILogger"/>.</param>
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/// <param name="providerManager">The <see cref="IProviderManager"/>.</param>
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public LibraryChangedNotifier(
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ILibraryManager libraryManager,
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IServerConfigurationManager configurationManager,
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ISessionManager sessionManager,
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IUserManager userManager,
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ILogger<LibraryChangedNotifier> logger,
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IProviderManager providerManager)
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{
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_libraryManager = libraryManager;
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_configurationManager = configurationManager;
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_sessionManager = sessionManager;
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_userManager = userManager;
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_logger = logger;
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_providerManager = providerManager;
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}
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/// <inheritdoc />
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public Task StartAsync(CancellationToken cancellationToken)
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{
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_libraryManager.ItemAdded += OnLibraryItemAdded;
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_libraryManager.ItemUpdated += OnLibraryItemUpdated;
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_libraryManager.ItemRemoved += OnLibraryItemRemoved;
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_providerManager.RefreshCompleted += OnProviderRefreshCompleted;
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_providerManager.RefreshStarted += OnProviderRefreshStarted;
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_providerManager.RefreshProgress += OnProviderRefreshProgress;
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return Task.CompletedTask;
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}
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/// <inheritdoc />
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public Task StopAsync(CancellationToken cancellationToken)
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{
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_libraryManager.ItemAdded -= OnLibraryItemAdded;
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_libraryManager.ItemUpdated -= OnLibraryItemUpdated;
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_libraryManager.ItemRemoved -= OnLibraryItemRemoved;
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_providerManager.RefreshCompleted -= OnProviderRefreshCompleted;
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_providerManager.RefreshStarted -= OnProviderRefreshStarted;
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_providerManager.RefreshProgress -= OnProviderRefreshProgress;
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return Task.CompletedTask;
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}
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private void OnProviderRefreshProgress(object? sender, GenericEventArgs<Tuple<BaseItem, double>> e)
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{
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var item = e.Argument.Item1;
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if (!EnableRefreshMessage(item))
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{
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return;
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}
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var progress = e.Argument.Item2;
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if (_lastProgressMessageTimes.TryGetValue(item.Id, out var lastMessageSendTime))
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{
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if (progress > 0 && progress < 100 && (DateTime.UtcNow - lastMessageSendTime).TotalMilliseconds < 1000)
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{
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return;
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}
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}
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_lastProgressMessageTimes.AddOrUpdate(item.Id, _ => DateTime.UtcNow, (_, _) => DateTime.UtcNow);
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var dict = new Dictionary<string, string>();
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dict["ItemId"] = item.Id.ToString("N", CultureInfo.InvariantCulture);
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dict["Progress"] = progress.ToString(CultureInfo.InvariantCulture);
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try
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{
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_sessionManager.SendMessageToAdminSessions(SessionMessageType.RefreshProgress, dict, CancellationToken.None);
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}
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catch
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{
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}
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var collectionFolders = _libraryManager.GetCollectionFolders(item);
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foreach (var collectionFolder in collectionFolders)
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{
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var collectionFolderDict = new Dictionary<string, string>
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{
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["ItemId"] = collectionFolder.Id.ToString("N", CultureInfo.InvariantCulture),
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["Progress"] = (collectionFolder.GetRefreshProgress() ?? 0).ToString(CultureInfo.InvariantCulture)
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};
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try
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{
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_sessionManager.SendMessageToAdminSessions(SessionMessageType.RefreshProgress, collectionFolderDict, CancellationToken.None);
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}
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catch
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{
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}
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}
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}
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private void OnProviderRefreshStarted(object? sender, GenericEventArgs<BaseItem> e)
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=> OnProviderRefreshProgress(sender, new GenericEventArgs<Tuple<BaseItem, double>>(new Tuple<BaseItem, double>(e.Argument, 0)));
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private void OnProviderRefreshCompleted(object? sender, GenericEventArgs<BaseItem> e)
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{
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OnProviderRefreshProgress(sender, new GenericEventArgs<Tuple<BaseItem, double>>(new Tuple<BaseItem, double>(e.Argument, 100)));
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_lastProgressMessageTimes.TryRemove(e.Argument.Id, out _);
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}
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private static bool EnableRefreshMessage(BaseItem item)
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=> item is Folder { IsRoot: false, IsTopParent: true }
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and not (AggregateFolder or UserRootFolder or UserView or Channel);
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private void OnLibraryItemAdded(object? sender, ItemChangeEventArgs e)
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=> OnLibraryChange(e.Item, e.Parent, _itemsAdded, _foldersAddedTo);
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private void OnLibraryItemUpdated(object? sender, ItemChangeEventArgs e)
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=> OnLibraryChange(e.Item, e.Parent, _itemsUpdated, null);
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private void OnLibraryItemRemoved(object? sender, ItemChangeEventArgs e)
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=> OnLibraryChange(e.Item, e.Parent, _itemsRemoved, _foldersRemovedFrom);
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private void OnLibraryChange(BaseItem item, BaseItem parent, List<BaseItem> itemsList, List<Folder>? foldersList)
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{
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if (!FilterItem(item))
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{
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return;
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}
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lock (_libraryChangedSyncLock)
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{
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var updateDuration = TimeSpan.FromSeconds(_configurationManager.Configuration.LibraryUpdateDuration);
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if (_libraryUpdateTimer is null)
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{
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_libraryUpdateTimer = new Timer(LibraryUpdateTimerCallback, null, updateDuration, Timeout.InfiniteTimeSpan);
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}
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else
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{
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_libraryUpdateTimer.Change(updateDuration, Timeout.InfiniteTimeSpan);
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}
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if (foldersList is not null && parent is Folder folder)
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{
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foldersList.Add(folder);
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}
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itemsList.Add(item);
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}
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}
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private async void LibraryUpdateTimerCallback(object? state)
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{
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List<Folder> foldersAddedTo;
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List<Folder> foldersRemovedFrom;
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List<BaseItem> itemsUpdated;
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List<BaseItem> itemsAdded;
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List<BaseItem> itemsRemoved;
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lock (_libraryChangedSyncLock)
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{
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// Remove dupes in case some were saved multiple times
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foldersAddedTo = _foldersAddedTo
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.DistinctBy(x => x.Id)
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.ToList();
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foldersRemovedFrom = _foldersRemovedFrom
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.DistinctBy(x => x.Id)
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.ToList();
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itemsUpdated = _itemsUpdated
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.Where(i => !_itemsAdded.Contains(i))
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.DistinctBy(x => x.Id)
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.ToList();
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itemsAdded = _itemsAdded.ToList();
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itemsRemoved = _itemsRemoved.ToList();
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if (_libraryUpdateTimer is not null)
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{
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_libraryUpdateTimer.Dispose();
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_libraryUpdateTimer = null;
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}
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_itemsAdded.Clear();
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_itemsRemoved.Clear();
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_itemsUpdated.Clear();
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_foldersAddedTo.Clear();
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_foldersRemovedFrom.Clear();
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}
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await SendChangeNotifications(itemsAdded, itemsUpdated, itemsRemoved, foldersAddedTo, foldersRemovedFrom, CancellationToken.None).ConfigureAwait(false);
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}
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private async Task SendChangeNotifications(
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List<BaseItem> itemsAdded,
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List<BaseItem> itemsUpdated,
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List<BaseItem> itemsRemoved,
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List<Folder> foldersAddedTo,
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List<Folder> foldersRemovedFrom,
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CancellationToken cancellationToken)
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{
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var userIds = _sessionManager.Sessions
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.Select(i => i.UserId)
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.Where(i => !i.IsEmpty())
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.Distinct()
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.ToArray();
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foreach (var userId in userIds)
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{
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LibraryUpdateInfo info;
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try
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{
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info = GetLibraryUpdateInfo(itemsAdded, itemsUpdated, itemsRemoved, foldersAddedTo, foldersRemovedFrom, userId);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error in GetLibraryUpdateInfo");
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return;
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}
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if (info.IsEmpty)
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{
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continue;
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}
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try
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{
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await _sessionManager.SendMessageToUserSessions(
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new List<Guid> { userId },
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SessionMessageType.LibraryChanged,
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info,
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cancellationToken)
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.ConfigureAwait(false);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error sending LibraryChanged message");
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}
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}
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}
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private LibraryUpdateInfo GetLibraryUpdateInfo(
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List<BaseItem> itemsAdded,
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List<BaseItem> itemsUpdated,
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List<BaseItem> itemsRemoved,
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List<Folder> foldersAddedTo,
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List<Folder> foldersRemovedFrom,
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Guid userId)
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{
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var user = _userManager.GetUserById(userId);
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ArgumentNullException.ThrowIfNull(user);
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var newAndRemoved = new List<BaseItem>();
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newAndRemoved.AddRange(foldersAddedTo);
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newAndRemoved.AddRange(foldersRemovedFrom);
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var allUserRootChildren = _libraryManager.GetUserRootFolder()
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.GetChildren(user, true)
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.OfType<Folder>()
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.ToList();
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return new LibraryUpdateInfo
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{
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ItemsAdded = itemsAdded.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user))
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.Select(i => i.Id.ToString("N", CultureInfo.InvariantCulture))
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.Distinct()
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.ToArray(),
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ItemsUpdated = itemsUpdated.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user))
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.Select(i => i.Id.ToString("N", CultureInfo.InvariantCulture))
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.Distinct()
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.ToArray(),
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ItemsRemoved = itemsRemoved.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user, true))
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.Select(i => i.Id.ToString("N", CultureInfo.InvariantCulture))
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.Distinct()
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.ToArray(),
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FoldersAddedTo = foldersAddedTo.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user))
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.Select(i => i.Id.ToString("N", CultureInfo.InvariantCulture))
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.Distinct()
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.ToArray(),
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FoldersRemovedFrom = foldersRemovedFrom.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user))
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.Select(i => i.Id.ToString("N", CultureInfo.InvariantCulture))
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.Distinct()
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.ToArray(),
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CollectionFolders = GetTopParentIds(newAndRemoved, allUserRootChildren).ToArray()
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};
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}
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private static bool FilterItem(BaseItem item)
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{
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if (!item.IsFolder && !item.HasPathProtocol)
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{
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return false;
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}
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if (item is IItemByName && item is not MusicArtist)
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{
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return false;
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}
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return item.SourceType == SourceType.Library;
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}
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private static IEnumerable<string> GetTopParentIds(List<BaseItem> items, List<Folder> allUserRootChildren)
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{
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var list = new List<string>();
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foreach (var item in items)
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{
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// If the physical root changed, return the user root
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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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foreach (var folder in allUserRootChildren)
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{
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list.Add(folder.Id.ToString("N", CultureInfo.InvariantCulture));
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}
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}
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return list.Distinct(StringComparer.Ordinal);
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}
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private T[] TranslatePhysicalItemToUserLibrary<T>(T item, User user, bool includeIfNotFound = false)
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where T : BaseItem
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{
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// If the physical root changed, return the user root
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if (item is AggregateFolder)
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{
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return _libraryManager.GetUserRootFolder() is T t ? new[] { t } : Array.Empty<T>();
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}
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// Return it only if it's in the user's library
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if (includeIfNotFound || item.IsVisibleStandalone(user))
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{
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return new[] { item };
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}
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return Array.Empty<T>();
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}
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/// <inheritdoc />
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public void Dispose()
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{
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_libraryUpdateTimer?.Dispose();
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_libraryUpdateTimer = null;
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}
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}
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