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using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Plugins;
using MediaBrowser.Controller.Session;
using MediaBrowser.Model.Entities;
using System.Linq;
using System.Threading;
namespace MediaBrowser.ServerApplication.EntryPoints
{
public class LibraryChangedNotifier : IServerEntryPoint
{
/// <summary>
/// The _library manager
/// </summary>
private readonly ILibraryManager _libraryManager;
private readonly ISessionManager _sessionManager;
private readonly IServerManager _serverManager;
/// <summary>
/// The _library changed sync lock
/// </summary>
private readonly object _libraryChangedSyncLock = new object();
/// <summary>
/// Gets or sets the library update info.
/// </summary>
/// <value>The library update info.</value>
private LibraryUpdateInfo LibraryUpdateInfo { get; set; }
/// <summary>
/// Gets or sets the library update timer.
/// </summary>
/// <value>The library update timer.</value>
private Timer LibraryUpdateTimer { get; set; }
/// <summary>
/// The library update duration
/// </summary>
private const int LibraryUpdateDuration = 60000;
public LibraryChangedNotifier(ILibraryManager libraryManager, ISessionManager sessionManager, IServerManager serverManager)
{
_libraryManager = libraryManager;
_sessionManager = sessionManager;
_serverManager = serverManager;
}
public void Run()
{
_libraryManager.ItemAdded += libraryManager_ItemAdded;
_libraryManager.ItemUpdated += libraryManager_ItemUpdated;
_libraryManager.ItemRemoved += libraryManager_ItemRemoved;
}
/// <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)
{
lock (_libraryChangedSyncLock)
{
if (LibraryUpdateInfo == null)
{
LibraryUpdateInfo = new LibraryUpdateInfo();
}
if (LibraryUpdateTimer == null)
{
LibraryUpdateTimer = new Timer(LibraryUpdateTimerCallback, null, LibraryUpdateDuration,
Timeout.Infinite);
}
else
{
LibraryUpdateTimer.Change(LibraryUpdateDuration, Timeout.Infinite);
}
if (e.Item.Parent != null)
{
LibraryUpdateInfo.FoldersAddedTo.Add(e.Item.Parent.Id);
}
LibraryUpdateInfo.ItemsAdded.Add(e.Item.Id);
}
}
/// <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)
{
lock (_libraryChangedSyncLock)
{
if (LibraryUpdateInfo == null)
{
LibraryUpdateInfo = new LibraryUpdateInfo();
}
if (LibraryUpdateTimer == null)
{
LibraryUpdateTimer = new Timer(LibraryUpdateTimerCallback, null, LibraryUpdateDuration,
Timeout.Infinite);
}
else
{
LibraryUpdateTimer.Change(LibraryUpdateDuration, Timeout.Infinite);
}
LibraryUpdateInfo.ItemsUpdated.Add(e.Item.Id);
}
}
/// <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)
{
lock (_libraryChangedSyncLock)
{
if (LibraryUpdateInfo == null)
{
LibraryUpdateInfo = new LibraryUpdateInfo();
}
if (LibraryUpdateTimer == null)
{
LibraryUpdateTimer = new Timer(LibraryUpdateTimerCallback, null, LibraryUpdateDuration,
Timeout.Infinite);
}
else
{
LibraryUpdateTimer.Change(LibraryUpdateDuration, Timeout.Infinite);
}
if (e.Item.Parent != null)
{
LibraryUpdateInfo.FoldersRemovedFrom.Add(e.Item.Parent.Id);
}
LibraryUpdateInfo.ItemsRemoved.Add(e.Item.Id);
}
}
/// <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
LibraryUpdateInfo.FoldersAddedTo = LibraryUpdateInfo.FoldersAddedTo.Distinct().ToList();
LibraryUpdateInfo.FoldersRemovedFrom = LibraryUpdateInfo.FoldersRemovedFrom.Distinct().ToList();
LibraryUpdateInfo.ItemsUpdated = LibraryUpdateInfo.ItemsUpdated
.Where(i => !LibraryUpdateInfo.ItemsAdded.Contains(i))
.Distinct()
.ToList();
_serverManager.SendWebSocketMessage("LibraryChanged", LibraryUpdateInfo);
if (LibraryUpdateTimer != null)
{
LibraryUpdateTimer.Dispose();
LibraryUpdateTimer = null;
}
LibraryUpdateInfo = null;
}
}
/// <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;
}
}
}
}
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