Clean up DeviceManager and don't store capabilities on disk

Emby.Server.Implementations/Devices/DeviceManager.cs

@@ -1,61 +1,38 @@
 #pragma warning disable CS1591
 
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
-using System.Globalization;
-using System.IO;
 using System.Linq;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
 using Jellyfin.Data.Events;
-using MediaBrowser.Common.Extensions;
-using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Devices;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Security;
 using MediaBrowser.Model.Devices;
 using MediaBrowser.Model.Querying;
-using MediaBrowser.Model.Serialization;
 using MediaBrowser.Model.Session;
-using Microsoft.Extensions.Caching.Memory;
 
 namespace Emby.Server.Implementations.Devices
 {
     public class DeviceManager : IDeviceManager
     {
-        private readonly IMemoryCache _memoryCache;
-        private readonly IJsonSerializer _json;
         private readonly IUserManager _userManager;
-        private readonly IServerConfigurationManager _config;
         private readonly IAuthenticationRepository _authRepo;
-        private readonly object _capabilitiesSyncLock = new object();
+        private readonly ConcurrentDictionary<string, ClientCapabilities> _capabilitiesMap = new ();
 
-        public event EventHandler<GenericEventArgs<Tuple<string, DeviceOptions>>> DeviceOptionsUpdated;
-
-        public DeviceManager(
-            IAuthenticationRepository authRepo,
-            IJsonSerializer json,
-            IUserManager userManager,
-            IServerConfigurationManager config,
-            IMemoryCache memoryCache)
+        public DeviceManager(IAuthenticationRepository authRepo, IUserManager userManager)
         {
-            _json = json;
             _userManager = userManager;
-            _config = config;
-            _memoryCache = memoryCache;
             _authRepo = authRepo;
         }
 
+        public event EventHandler<GenericEventArgs<Tuple<string, DeviceOptions>>> DeviceOptionsUpdated;
+
         public void SaveCapabilities(string deviceId, ClientCapabilities capabilities)
         {
-            var path = Path.Combine(GetDevicePath(deviceId), "capabilities.json");
-            Directory.CreateDirectory(Path.GetDirectoryName(path));
-
-            lock (_capabilitiesSyncLock)
-            {
-                _memoryCache.Set(deviceId, capabilities);
-                _json.SerializeToFile(capabilities, path);
-            }
+            _capabilitiesMap[deviceId] = capabilities;
         }
 
         public void UpdateDeviceOptions(string deviceId, DeviceOptions options)
@@ -72,32 +49,12 @@ namespace Emby.Server.Implementations.Devices
 
         public ClientCapabilities GetCapabilities(string id)
         {
-            if (_memoryCache.TryGetValue(id, out ClientCapabilities result))
-            {
-                return result;
-            }
-
-            lock (_capabilitiesSyncLock)
-            {
-                var path = Path.Combine(GetDevicePath(id), "capabilities.json");
-                try
-                {
-                    return _json.DeserializeFromFile<ClientCapabilities>(path) ?? new ClientCapabilities();
-                }
-                catch
-                {
-                }
-            }
-
-            return new ClientCapabilities();
+            return _capabilitiesMap.TryGetValue(id, out ClientCapabilities result)
+                ? result
+                : new ClientCapabilities();
         }
 
         public DeviceInfo GetDevice(string id)
-        {
-            return GetDevice(id, true);
-        }
-
-        private DeviceInfo GetDevice(string id, bool includeCapabilities)
         {
             var session = _authRepo.Get(new AuthenticationInfoQuery
             {
@@ -154,16 +111,6 @@ namespace Emby.Server.Implementations.Devices
             };
         }
 
-        private string GetDevicesPath()
-        {
-            return Path.Combine(_config.ApplicationPaths.DataPath, "devices");
-        }
-
-        private string GetDevicePath(string id)
-        {
-            return Path.Combine(GetDevicesPath(), id.GetMD5().ToString("N", CultureInfo.InvariantCulture));
-        }
-
         public bool CanAccessDevice(User user, string deviceId)
         {
             if (user == null)

Emby.Server.Implementations/Session/SessionManager.cs

@@ -58,8 +58,7 @@ namespace Emby.Server.Implementations.Session
         /// <summary>
         /// The active connections.
         /// </summary>
-        private readonly ConcurrentDictionary<string, SessionInfo> _activeConnections =
-            new ConcurrentDictionary<string, SessionInfo>(StringComparer.OrdinalIgnoreCase);
+        private readonly ConcurrentDictionary<string, SessionInfo> _activeConnections = new (StringComparer.OrdinalIgnoreCase);
 
         private Timer _idleTimer;
 
@@ -196,7 +195,7 @@ namespace Emby.Server.Implementations.Session
         {
             if (!string.IsNullOrEmpty(info.DeviceId))
             {
-                var capabilities = GetSavedCapabilities(info.DeviceId);
+                var capabilities = _deviceManager.GetCapabilities(info.DeviceId);
 
                 if (capabilities != null)
                 {
@@ -1677,27 +1676,10 @@ namespace Emby.Server.Implementations.Session
                         SessionInfo = session
                     });
 
-                try
-                {
-                    SaveCapabilities(session.DeviceId, capabilities);
-                }
-                catch (Exception ex)
-                {
-                    _logger.LogError("Error saving device capabilities", ex);
-                }
+                _deviceManager.SaveCapabilities(session.DeviceId, capabilities);
             }
         }
 
-        private ClientCapabilities GetSavedCapabilities(string deviceId)
-        {
-            return _deviceManager.GetCapabilities(deviceId);
-        }
-
-        private void SaveCapabilities(string deviceId, ClientCapabilities capabilities)
-        {
-            _deviceManager.SaveCapabilities(deviceId, capabilities);
-        }
-
         /// <summary>
         /// Converts a BaseItem to a BaseItemInfo.
         /// </summary>