Merge branch 'master' into authenticationdb-efcore

# Conflicts:
#	Emby.Server.Implementations/Devices/DeviceManager.cs
#	Emby.Server.Implementations/HttpServer/Security/SessionContext.cs
#	Emby.Server.Implementations/Security/AuthenticationRepository.cs
#	Emby.Server.Implementations/Session/SessionManager.cs
#	Jellyfin.Server.Implementations/Security/AuthorizationContext.cs
#	MediaBrowser.Controller/Library/IUserManager.cs
#	MediaBrowser.Controller/Net/ISessionContext.cs

3 files changed, 107 insertions, 4 deletions

diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
index 2312c85d9..baeb86a22 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
@@ -140,8 +140,10 @@ namespace Emby.Server.Implementations.ScheduledTasks
                         previouslyFailedImages.Add(key);
 
                         var parentPath = Path.GetDirectoryName(failHistoryPath);
-
-                        Directory.CreateDirectory(parentPath);
+                        if (parentPath != null)
+                        {
+                            Directory.CreateDirectory(parentPath);
+                        }
 
                         string text = string.Join('|', previouslyFailedImages);
                         File.WriteAllText(failHistoryPath, text);
diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/CleanActivityLogTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/CleanActivityLogTask.cs
index 4abbf784b..50ba9bc89 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Tasks/CleanActivityLogTask.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/CleanActivityLogTask.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
@@ -75,4 +75,4 @@ namespace Emby.Server.Implementations.ScheduledTasks.Tasks
             return Enumerable.Empty<TaskTriggerInfo>();
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/OptimizeDatabaseTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/OptimizeDatabaseTask.cs
new file mode 100644
index 000000000..1ad1d0f50
--- /dev/null
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/OptimizeDatabaseTask.cs
@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Jellyfin.Server.Implementations;
+using MediaBrowser.Model.Globalization;
+using MediaBrowser.Model.Tasks;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+
+namespace Emby.Server.Implementations.ScheduledTasks.Tasks
+{
+    /// <summary>
+    /// Optimizes Jellyfin's database by issuing a VACUUM command.
+    /// </summary>
+    public class OptimizeDatabaseTask : IScheduledTask, IConfigurableScheduledTask
+    {
+        private readonly ILogger<OptimizeDatabaseTask> _logger;
+        private readonly ILocalizationManager _localization;
+        private readonly JellyfinDbProvider _provider;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="OptimizeDatabaseTask" /> class.
+        /// </summary>
+        public OptimizeDatabaseTask(
+            ILogger<OptimizeDatabaseTask> logger,
+            ILocalizationManager localization,
+            JellyfinDbProvider provider)
+        {
+            _logger = logger;
+            _localization = localization;
+            _provider = provider;
+        }
+
+        /// <inheritdoc />
+        public string Name => _localization.GetLocalizedString("TaskOptimizeDatabase");
+
+        /// <inheritdoc />
+        public string Description => _localization.GetLocalizedString("TaskOptimizeDatabaseDescription");
+
+        /// <inheritdoc />
+        public string Category => _localization.GetLocalizedString("TasksMaintenanceCategory");
+
+        /// <inheritdoc />
+        public string Key => "OptimizeDatabaseTask";
+
+        /// <inheritdoc />
+        public bool IsHidden => false;
+
+        /// <inheritdoc />
+        public bool IsEnabled => true;
+
+        /// <inheritdoc />
+        public bool IsLogged => true;
+
+        /// <summary>
+        /// Creates the triggers that define when the task will run.
+        /// </summary>
+        /// <returns>IEnumerable{BaseTaskTrigger}.</returns>
+        public IEnumerable<TaskTriggerInfo> GetDefaultTriggers()
+        {
+            return new[]
+            {
+                // Every so often
+                new TaskTriggerInfo { Type = TaskTriggerInfo.TriggerInterval, IntervalTicks = TimeSpan.FromHours(24).Ticks }
+            };
+        }
+
+        /// <summary>
+        /// Returns the task to be executed.
+        /// </summary>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <param name="progress">The progress.</param>
+        /// <returns>Task.</returns>
+        public Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
+        {
+            _logger.LogInformation("Optimizing and vacuuming jellyfin.db...");
+
+            try
+            {
+                using var context = _provider.CreateContext();
+                if (context.Database.IsSqlite())
+                {
+                    context.Database.ExecuteSqlRaw("PRAGMA optimize");
+                    context.Database.ExecuteSqlRaw("VACUUM");
+                    _logger.LogInformation("jellyfin.db optimized successfully!");
+                }
+                else
+                {
+                    _logger.LogInformation("This database doesn't support optimization");
+                }
+            }
+            catch (Exception e)
+            {
+                _logger.LogError(e, "Error while optimizing jellyfin.db");
+            }
+
+            return Task.CompletedTask;
+        }
+    }
+}