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using MediaBrowser.Controller.Dto;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Plugins;
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using MediaBrowser.Controller.Session;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Session;
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using System;
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using System.Collections.Generic;
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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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namespace MediaBrowser.Server.Implementations.EntryPoints
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{
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class UserDataChangeNotifier : IServerEntryPoint
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{
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private readonly ISessionManager _sessionManager;
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private readonly ILogger _logger;
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private readonly IDtoService _dtoService;
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private readonly IUserDataManager _userDataManager;
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private readonly object _syncLock = new object();
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private Timer UpdateTimer { get; set; }
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private const int UpdateDuration = 2000;
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private readonly Dictionary<Guid, List<string>> _changedKeys = new Dictionary<Guid, List<string>>();
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public UserDataChangeNotifier(IUserDataManager userDataManager, ISessionManager sessionManager, IDtoService dtoService, ILogger logger)
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{
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_userDataManager = userDataManager;
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_sessionManager = sessionManager;
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_dtoService = dtoService;
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_logger = logger;
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}
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public void Run()
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{
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_userDataManager.UserDataSaved += _userDataManager_UserDataSaved;
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}
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void _userDataManager_UserDataSaved(object sender, UserDataSaveEventArgs e)
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{
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if (e.SaveReason == UserDataSaveReason.PlaybackProgress)
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{
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return;
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}
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lock (_syncLock)
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{
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if (UpdateTimer == null)
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{
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UpdateTimer = new Timer(UpdateTimerCallback, null, UpdateDuration,
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Timeout.Infinite);
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}
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else
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{
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UpdateTimer.Change(UpdateDuration, Timeout.Infinite);
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}
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List<string> keys;
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if (!_changedKeys.TryGetValue(e.UserId, out keys))
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{
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keys = new List<string>();
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_changedKeys[e.UserId] = keys;
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}
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keys.Add(e.Key);
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}
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}
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private void UpdateTimerCallback(object state)
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{
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lock (_syncLock)
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{
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// Remove dupes in case some were saved multiple times
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var changes = _changedKeys.ToList();
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_changedKeys.Clear();
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SendNotifications(changes, CancellationToken.None);
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if (UpdateTimer != null)
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{
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UpdateTimer.Dispose();
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UpdateTimer = null;
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}
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}
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}
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private async Task SendNotifications(List<KeyValuePair<Guid, List<string>>> changes, CancellationToken cancellationToken)
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{
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foreach (var pair in changes)
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{
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var userId = pair.Key;
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var userSessions = _sessionManager.Sessions
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.Where(u => u.User != null && u.User.Id == userId && u.SessionController != null && u.IsActive)
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.ToList();
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if (userSessions.Count > 0)
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{
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var dtoList = pair.Value
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.Select(i => _dtoService.GetUserItemDataDto(_userDataManager.GetUserData(userId, i)))
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.ToList();
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var info = new UserDataChangeInfo
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{
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UserId = userId.ToString("N"),
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UserDataList = dtoList
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};
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foreach (var userSession in userSessions)
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{
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try
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{
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await userSession.SessionController.SendUserDataChangeInfo(info, cancellationToken).ConfigureAwait(false);
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error sending UserDataChanged message", ex);
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}
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}
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}
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}
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}
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public void Dispose()
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{
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if (UpdateTimer != null)
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{
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UpdateTimer.Dispose();
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UpdateTimer = null;
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}
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_userDataManager.UserDataSaved -= _userDataManager_UserDataSaved;
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}
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}
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}
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