Automatically clean activity log database

Emby.Server.Implementations/ScheduledTasks/Tasks/CleanActivityLogTask.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Model.Activity;
+using MediaBrowser.Model.Globalization;
+using MediaBrowser.Model.Tasks;
+
+namespace Emby.Server.Implementations.ScheduledTasks.Tasks
+{
+    /// <summary>
+    /// Deletes old activity log entries.
+    /// </summary>
+    public class CleanActivityLogTask : IScheduledTask, IConfigurableScheduledTask
+    {
+        private readonly ILocalizationManager _localization;
+        private readonly IActivityManager _activityManager;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CleanActivityLogTask"/> class.
+        /// </summary>
+        /// <param name="localization">Instance of the <see cref="ILocalizationManager"/> interface.</param>
+        /// <param name="activityManager">Instance of the <see cref="IActivityManager"/> interface.</param>
+        public CleanActivityLogTask(
+            ILocalizationManager localization,
+            IActivityManager activityManager)
+        {
+            _localization = localization;
+            _activityManager = activityManager;
+        }
+
+        /// <inheritdoc />
+        public string Name => _localization.GetLocalizedString("TaskCleanActivityLog");
+
+        /// <inheritdoc />
+        public string Key => "CleanActivityLog";
+
+        /// <inheritdoc />
+        public string Description => _localization.GetLocalizedString("TaskCleanActivityLogDescription");
+
+        /// <inheritdoc />
+        public string Category => _localization.GetLocalizedString("TasksMaintenanceCategory");
+
+        /// <inheritdoc />
+        public bool IsHidden => false;
+
+        /// <inheritdoc />
+        public bool IsEnabled => true;
+
+        /// <inheritdoc />
+        public bool IsLogged => true;
+
+        /// <inheritdoc />
+        public Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
+        {
+            // TODO allow configure
+            var startDate = DateTime.UtcNow.AddDays(-30);
+            return _activityManager.CleanAsync(startDate);
+        }
+
+        /// <inheritdoc />
+        public IEnumerable<TaskTriggerInfo> GetDefaultTriggers()
+        {
+            return Enumerable.Empty<TaskTriggerInfo>();
+        }
+    }
+}