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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 MediaBrowser.Model.Session;
using MoreLinq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.EntryPoints
{
class UserDataChangeNotifier : IServerEntryPoint
{
private readonly ISessionManager _sessionManager;
private readonly ILogger _logger;
private readonly IUserDataManager _userDataManager;
private readonly IUserManager _userManager;
private readonly object _syncLock = new object();
private Timer UpdateTimer { get; set; }
private const int UpdateDuration = 500;
private readonly Dictionary<Guid, List<IHasUserData>> _changedItems = new Dictionary<Guid, List<IHasUserData>>();
public UserDataChangeNotifier(IUserDataManager userDataManager, ISessionManager sessionManager, ILogger logger, IUserManager userManager)
{
_userDataManager = userDataManager;
_sessionManager = sessionManager;
_logger = logger;
_userManager = userManager;
}
public void Run()
{
_userDataManager.UserDataSaved += _userDataManager_UserDataSaved;
}
void _userDataManager_UserDataSaved(object sender, UserDataSaveEventArgs e)
{
if (e.SaveReason == UserDataSaveReason.PlaybackProgress)
{
return;
}
lock (_syncLock)
{
if (UpdateTimer == null)
{
UpdateTimer = new Timer(UpdateTimerCallback, null, UpdateDuration,
Timeout.Infinite);
}
else
{
UpdateTimer.Change(UpdateDuration, Timeout.Infinite);
}
List<IHasUserData> keys;
if (!_changedItems.TryGetValue(e.UserId, out keys))
{
keys = new List<IHasUserData>();
_changedItems[e.UserId] = keys;
}
keys.Add(e.Item);
var baseItem = e.Item as BaseItem;
// Go up one level for indicators
if (baseItem != null)
{
var parent = baseItem.Parent;
if (parent != null)
{
keys.Add(parent);
}
}
}
}
private void UpdateTimerCallback(object state)
{
lock (_syncLock)
{
// Remove dupes in case some were saved multiple times
var changes = _changedItems.ToList();
_changedItems.Clear();
SendNotifications(changes, CancellationToken.None);
if (UpdateTimer != null)
{
UpdateTimer.Dispose();
UpdateTimer = null;
}
}
}
private async Task SendNotifications(IEnumerable<KeyValuePair<Guid, List<IHasUserData>>> changes, CancellationToken cancellationToken)
{
foreach (var pair in changes)
{
var userId = pair.Key;
var userSessions = _sessionManager.Sessions
.Where(u => u.ContainsUser(userId) && u.SessionController != null && u.IsActive)
.ToList();
if (userSessions.Count > 0)
{
var user = _userManager.GetUserById(userId);
var dtoList = pair.Value
.DistinctBy(i => i.Id)
.Select(i =>
{
var dto = _userDataManager.GetUserDataDto(i, user);
dto.ItemId = i.Id.ToString("N");
return dto;
})
.ToList();
var info = new UserDataChangeInfo
{
UserId = userId.ToString("N"),
UserDataList = dtoList
};
foreach (var userSession in userSessions)
{
try
{
await userSession.SessionController.SendUserDataChangeInfo(info, cancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.ErrorException("Error sending UserDataChanged message", ex);
}
}
}
}
}
public void Dispose()
{
if (UpdateTimer != null)
{
UpdateTimer.Dispose();
UpdateTimer = null;
}
_userDataManager.UserDataSaved -= _userDataManager_UserDataSaved;
}
}
}
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