add clean db task

MediaBrowser.Server.Implementations/Persistence/CleanDatabaseScheduledTask.cs

@@ -0,0 +1,89 @@
+using MediaBrowser.Common.Progress;
+using MediaBrowser.Common.ScheduledTasks;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Persistence;
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Model.Logging;
+
+namespace MediaBrowser.Server.Implementations.Persistence
+{
+    class CleanDatabaseScheduledTask : IScheduledTask
+    {
+        private readonly ILibraryManager _libraryManager;
+        private readonly IItemRepository _itemRepo;
+        private readonly ILogger _logger;
+
+        public CleanDatabaseScheduledTask(ILibraryManager libraryManager, IItemRepository itemRepo, ILogger logger)
+        {
+            _libraryManager = libraryManager;
+            _itemRepo = itemRepo;
+            _logger = logger;
+        }
+
+        public string Name
+        {
+            get { return "Clean Database"; }
+        }
+
+        public string Description
+        {
+            get { return "Deletes obsolete content from the database."; }
+        }
+
+        public string Category
+        {
+            get { return "Library"; }
+        }
+
+        public async Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
+        {
+            var innerProgress = new ActionableProgress<double>();
+            innerProgress.RegisterAction(progress.Report);
+
+            await UpdateToLatestSchema(cancellationToken, innerProgress).ConfigureAwait(false);
+        }
+
+        private async Task UpdateToLatestSchema(CancellationToken cancellationToken, IProgress<double> progress)
+        {
+            var itemIds = _libraryManager.GetItemIds(new InternalItemsQuery
+            {
+                IsCurrentSchema = false,
+                Limit = 50000
+            });
+
+            var numComplete = 0;
+            var numItems = itemIds.Count;
+
+            _logger.Debug("Upgrading schema for {0} items", numItems);
+
+            foreach (var itemId in itemIds)
+            {
+                var item = _libraryManager.GetItemById(itemId);
+
+                if (item != null)
+                {
+                    await _itemRepo.SaveItem(item, cancellationToken).ConfigureAwait(false);
+                }
+
+                numComplete++;
+                double percent = numComplete;
+                percent /= numItems;
+                progress.Report(percent * 100);
+            }
+
+            progress.Report(100);
+        }
+
+        public IEnumerable<ITaskTrigger> GetDefaultTriggers()
+        {
+            return new ITaskTrigger[] 
+            { 
+                new IntervalTrigger{ Interval = TimeSpan.FromDays(1)}
+            };
+        }
+    }
+}