Add notification for item deleted

Jellyfin.Plugin.Webhook/Configuration/Web/config.js

@@ -40,6 +40,7 @@ export default function (view) {
             template: document.querySelector("#template-notification-type"),
             values: {
                 "ItemAdded": "Item Added",
+                "ItemDeleted": "Item Deleted",
                 "PlaybackStart": "Playback Start",
                 "PlaybackProgress": "Playback Progress",
                 "PlaybackStop": "Playback Stop",

Jellyfin.Plugin.Webhook/Destinations/NotificationType.cs

@@ -123,5 +123,10 @@ public enum NotificationType
     /// <summary>
     /// User data saved.
     /// </summary>
-    UserDataSaved = 23
+    UserDataSaved = 23,
+
+    /// <summary>
+    /// Item Deleted notification.
+    /// </summary>
+    ItemDeleted = 24
 }

Jellyfin.Plugin.Webhook/Models/QueuedItemContainer.cs

@@ -11,19 +11,33 @@ public class QueuedItemContainer
     /// Initializes a new instance of the <see cref="QueuedItemContainer"/> class.
     /// </summary>
     /// <param name="id">The item id.</param>
-    public QueuedItemContainer(Guid id)
+    /// <param name="name">The item name (nullable).</param>
+    /// <param name="itemType">The item type.</param>
+    public QueuedItemContainer(Guid id, string? name = null, string? itemType = null)
     {
         ItemId = id;
+        Name = name;
+        ItemType = itemType;
         RetryCount = 0;
     }
 
     /// <summary>
-    /// Gets or sets the current retry count.
+    /// Gets or sets the item name.
     /// </summary>
-    public int RetryCount { get; set; }
+    public string? Name { get; set; }
+
+    /// <summary>
+    /// Gets or sets the item type.
+    /// </summary>
+    public string? ItemType { get; set; }
 
     /// <summary>
     /// Gets or sets the current item id.
     /// </summary>
     public Guid ItemId { get; set; }
+
+    /// <summary>
+    /// Gets or sets the current retry count.
+    /// </summary>
+    public int RetryCount { get; set; }
 }

Jellyfin.Plugin.Webhook/Notifiers/ItemDeletedNotifier/IItemDeletedManager.cs

@@ -0,0 +1,22 @@
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Entities;
+
+namespace Jellyfin.Plugin.Webhook.Notifiers.ItemDeletedNotifier;
+
+/// <summary>
+/// Item deleted manager interface.
+/// </summary>
+public interface IItemDeletedManager
+{
+    /// <summary>
+    /// Process the current queue.
+    /// </summary>
+    /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+    public Task ProcessItemsAsync();
+
+    /// <summary>
+    /// Add item to process queue.
+    /// </summary>
+    /// <param name="item">The deleted item.</param>
+    public void AddItem(BaseItem item);
+}

Jellyfin.Plugin.Webhook/Notifiers/ItemDeletedNotifier/ItemDeletedManager.cs

@@ -0,0 +1,98 @@
+using System;
+using System.Collections.Concurrent;
+using System.Threading.Tasks;
+using Jellyfin.Plugin.Webhook.Destinations;
+using Jellyfin.Plugin.Webhook.Helpers;
+using Jellyfin.Plugin.Webhook.Models;
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+
+namespace Jellyfin.Plugin.Webhook.Notifiers.ItemDeletedNotifier;
+
+/// <inheritdoc />
+public class ItemDeletedManager : IItemDeletedManager
+{
+    private readonly ILogger<ItemDeletedManager> _logger;
+    private readonly ILibraryManager _libraryManager;
+    private readonly IServerApplicationHost _applicationHost;
+    private readonly ConcurrentDictionary<Guid, QueuedItemContainer> _itemProcessQueue;
+    private readonly ConcurrentDictionary<Guid, BaseItem> _deletedItems;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ItemDeletedManager"/> class.
+    /// </summary>
+    /// <param name="logger">Instance of the <see cref="ILogger{ItemDeletedManager}"/> interface.</param>
+    /// <param name="libraryManager">Instance of the <see cref="ILibraryManager"/> interface.</param>
+    /// <param name="applicationHost">Instance of the <see cref="IServerApplicationHost"/> interface.</param>
+    public ItemDeletedManager(
+        ILogger<ItemDeletedManager> logger,
+        ILibraryManager libraryManager,
+        IServerApplicationHost applicationHost)
+    {
+        _logger = logger;
+        _libraryManager = libraryManager;
+        _applicationHost = applicationHost;
+        _itemProcessQueue = new ConcurrentDictionary<Guid, QueuedItemContainer>();
+        _deletedItems = new ConcurrentDictionary<Guid, BaseItem>();
+    }
+
+    /// <inheritdoc />
+    public async Task ProcessItemsAsync()
+    {
+        _logger.LogDebug("ProcessItemsAsync");
+        // Attempt to process all items in queue.
+        var currentItems = _itemProcessQueue.ToArray();
+        if (currentItems.Length != 0)
+        {
+            var scope = _applicationHost.ServiceProvider!.CreateAsyncScope();
+            await using (scope.ConfigureAwait(false))
+            {
+                var webhookSender = scope.ServiceProvider.GetRequiredService<IWebhookSender>();
+                foreach (var (key, container) in currentItems)
+                {
+                    if (_deletedItems.TryGetValue(key, out var item))
+                    {
+                        if (item != null)
+                        {
+                            // Skip notification if item type is Studio
+                            if (container.ItemType == "Studio")
+                            {
+                                _logger.LogDebug("Skipping notification for item type Studio");
+                                _itemProcessQueue.TryRemove(key, out _);
+                                _deletedItems.TryRemove(key, out _);
+                                continue;
+                            }
+
+                            _logger.LogDebug("Notifying for {ItemName}", container.Name);
+
+                            // Send notification to each configured destination.
+                            var dataObject = DataObjectHelpers
+                                .GetBaseDataObject(_applicationHost, NotificationType.ItemDeleted)
+                                .AddBaseItemData(item);
+
+                            var itemType = Type.GetType($"MediaBrowser.Controller.Entities.{container.ItemType}");
+                            await webhookSender.SendNotification(NotificationType.ItemDeleted, dataObject, itemType)
+                                .ConfigureAwait(false);
+
+                            // Remove item from queue.
+                            _itemProcessQueue.TryRemove(key, out _);
+                            _deletedItems.TryRemove(key, out _);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    /// <inheritdoc />
+    public void AddItem(BaseItem item)
+    {
+        var itemType = item.GetType().Name;
+        _itemProcessQueue.TryAdd(item.Id, new QueuedItemContainer(item.Id, item.Name, itemType));
+        _deletedItems.TryAdd(item.Id, item);
+        _logger.LogDebug("Queued {ItemName} for notification", item.Name);
+    }
+}

Jellyfin.Plugin.Webhook/Notifiers/ItemDeletedNotifier/ItemDeletedNotifierEntryPoint.cs

@@ -0,0 +1,53 @@
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Library;
+using Microsoft.Extensions.Hosting;
+
+namespace Jellyfin.Plugin.Webhook.Notifiers.ItemDeletedNotifier;
+
+/// <summary>
+/// Notifier when a library item is deleted.
+/// </summary>
+public class ItemDeletedNotifierEntryPoint : IHostedService
+{
+    private readonly IItemDeletedManager _itemDeletedManager;
+    private readonly ILibraryManager _libraryManager;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ItemDeletedNotifierEntryPoint"/> class.
+    /// </summary>
+    /// <param name="itemDeletedManager">Instance of the <see cref="IItemDeletedManager"/> interface.</param>
+    /// <param name="libraryManager">Instance of the <see cref="ILibraryManager"/> interface.</param>
+    public ItemDeletedNotifierEntryPoint(
+        IItemDeletedManager itemDeletedManager,
+        ILibraryManager libraryManager)
+    {
+        _itemDeletedManager = itemDeletedManager;
+        _libraryManager = libraryManager;
+    }
+
+    private void ItemDeletedHandler(object? sender, ItemChangeEventArgs itemChangeEventArgs)
+    {
+        // Never notify on virtual items.
+        if (itemChangeEventArgs.Item.IsVirtualItem)
+        {
+            return;
+        }
+
+        _itemDeletedManager.AddItem(itemChangeEventArgs.Item);
+    }
+
+    /// <inheritdoc />
+    public Task StartAsync(CancellationToken cancellationToken)
+    {
+        _libraryManager.ItemRemoved += ItemDeletedHandler;
+        return Task.CompletedTask;
+    }
+
+    /// <inheritdoc />
+    public Task StopAsync(CancellationToken cancellationToken)
+    {
+        _libraryManager.ItemRemoved -= ItemDeletedHandler;
+        return Task.CompletedTask;
+    }
+}

Jellyfin.Plugin.Webhook/Notifiers/ItemDeletedNotifier/ItemDeletedScheduledTask.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Model.Globalization;
+using MediaBrowser.Model.Tasks;
+
+namespace Jellyfin.Plugin.Webhook.Notifiers.ItemDeletedNotifier;
+
+/// <summary>
+/// Scheduled task that processes item deleted events.
+/// </summary>
+public class ItemDeletedScheduledTask : IScheduledTask, IConfigurableScheduledTask
+{
+    private const int RecheckIntervalSec = 30;
+    private readonly IItemDeletedManager _itemDeletedManager;
+    private readonly ILocalizationManager _localizationManager;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ItemDeletedScheduledTask"/> class.
+    /// </summary>
+    /// <param name="itemDeletedManager">Instance of the <see cref="IItemDeletedManager"/> interface.</param>
+    /// <param name="localizationManager">Instance of the <see cref="ILocalizationManager"/> interface.</param>
+    public ItemDeletedScheduledTask(
+        IItemDeletedManager itemDeletedManager,
+        ILocalizationManager localizationManager)
+    {
+        _itemDeletedManager = itemDeletedManager;
+        _localizationManager = localizationManager;
+    }
+
+    /// <inheritdoc />
+    public string Name => "Webhook Item Deleted Notifier";
+
+    /// <inheritdoc />
+    public string Key => "WebhookItemDeleted";
+
+    /// <inheritdoc />
+    public string Description => "Processes item deleted queue";
+
+    /// <inheritdoc />
+    public string Category => _localizationManager.GetLocalizedString("TasksLibraryCategory");
+
+    /// <inheritdoc />
+    public bool IsHidden => false;
+
+    /// <inheritdoc />
+    public bool IsEnabled => true;
+
+    /// <inheritdoc />
+    public bool IsLogged => false;
+
+    /// <inheritdoc />
+    public Task ExecuteAsync(IProgress<double> progress, CancellationToken cancellationToken)
+    {
+        return _itemDeletedManager.ProcessItemsAsync();
+    }
+
+    /// <inheritdoc />
+    public IEnumerable<TaskTriggerInfo> GetDefaultTriggers()
+    {
+        return new[]
+        {
+                new TaskTriggerInfo
+                {
+                    Type = TaskTriggerInfo.TriggerInterval,
+                    IntervalTicks = TimeSpan.FromSeconds(RecheckIntervalSec).Ticks
+                }
+        };
+    }
+}

Jellyfin.Plugin.Webhook/PluginServiceRegistrator.cs

@@ -13,6 +13,7 @@
 using Jellyfin.Plugin.Webhook.Helpers;
 using Jellyfin.Plugin.Webhook.Notifiers;
 using Jellyfin.Plugin.Webhook.Notifiers.ItemAddedNotifier;
+using Jellyfin.Plugin.Webhook.Notifiers.ItemDeletedNotifier;
 using Jellyfin.Plugin.Webhook.Notifiers.UserDataSavedNotifier;
 using MediaBrowser.Common.Updates;
 using MediaBrowser.Controller;
@@ -58,6 +59,7 @@ public void RegisterServices(IServiceCollection serviceCollection, IServerApplic
         // Library consumers.
         serviceCollection.AddScoped<IEventConsumer<SubtitleDownloadFailureEventArgs>, SubtitleDownloadFailureNotifier>();
         serviceCollection.AddSingleton<IItemAddedManager, ItemAddedManager>();
+        serviceCollection.AddSingleton<IItemDeletedManager, ItemDeletedManager>();
 
         // Security consumers.
         serviceCollection.AddScoped<IEventConsumer<AuthenticationRequestEventArgs>, AuthenticationFailureNotifier>();
@@ -90,6 +92,7 @@ public void RegisterServices(IServiceCollection serviceCollection, IServerApplic
 
         serviceCollection.AddHostedService<WebhookServerEntryPoint>();
         serviceCollection.AddHostedService<ItemAddedNotifierEntryPoint>();
+        serviceCollection.AddHostedService<ItemDeletedNotifierEntryPoint>();
         serviceCollection.AddHostedService<UserDataSavedNotifierEntryPoint>();
     }
 }