Pushing missing changes

MediaBrowser.Common/ScheduledTasks/Tasks/DeleteCacheFileTask.cs

@@ -0,0 +1,109 @@
+using MediaBrowser.Common.Kernel;
+using MediaBrowser.Model.Tasks;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Common.ScheduledTasks.Tasks
+{
+    /// <summary>
+    /// Deletes old cache files
+    /// </summary>
+    [Export(typeof(IScheduledTask))]
+    public class DeleteCacheFileTask : BaseScheduledTask<IKernel>
+    {
+        /// <summary>
+        /// Creates the triggers that define when the task will run
+        /// </summary>
+        /// <returns>IEnumerable{BaseTaskTrigger}.</returns>
+        protected override IEnumerable<BaseTaskTrigger> GetDefaultTriggers()
+        {
+            var trigger = new DailyTrigger { TimeOfDay = TimeSpan.FromHours(2) }; //2am
+
+            return new[] { trigger };
+        }
+
+        /// <summary>
+        /// Returns the task to be executed
+        /// </summary>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <param name="progress">The progress.</param>
+        /// <returns>Task.</returns>
+        protected override Task ExecuteInternal(CancellationToken cancellationToken, IProgress<TaskProgress> progress)
+        {
+            return Task.Run(() =>
+            {
+                var minDateModified = DateTime.UtcNow.AddMonths(-2);
+
+                DeleteCacheFilesFromDirectory(cancellationToken, Kernel.ApplicationPaths.CachePath, minDateModified, progress);
+            });
+        }
+
+
+        /// <summary>
+        /// Deletes the cache files from directory with a last write time less than a given date
+        /// </summary>
+        /// <param name="cancellationToken">The task cancellation token.</param>
+        /// <param name="directory">The directory.</param>
+        /// <param name="minDateModified">The min date modified.</param>
+        /// <param name="progress">The progress.</param>
+        private void DeleteCacheFilesFromDirectory(CancellationToken cancellationToken, string directory, DateTime minDateModified, IProgress<TaskProgress> progress)
+        {
+            var filesToDelete = new DirectoryInfo(directory).EnumerateFileSystemInfos("*", SearchOption.AllDirectories)
+                .Where(f => !f.Attributes.HasFlag(FileAttributes.Directory) && f.LastWriteTimeUtc < minDateModified)
+                .ToList();
+
+            var index = 0;
+
+            foreach (var file in filesToDelete)
+            {
+                double percent = index;
+                percent /= filesToDelete.Count;
+
+                progress.Report(new TaskProgress { Description = file.FullName, PercentComplete = 100 * percent });
+
+                cancellationToken.ThrowIfCancellationRequested();
+
+                File.Delete(file.FullName);
+
+                index++;
+            }
+
+            progress.Report(new TaskProgress { PercentComplete = 100 });
+        }
+
+        /// <summary>
+        /// Gets the name of the task
+        /// </summary>
+        /// <value>The name.</value>
+        public override string Name
+        {
+            get { return "Cache file cleanup"; }
+        }
+
+        /// <summary>
+        /// Gets the description.
+        /// </summary>
+        /// <value>The description.</value>
+        public override string Description
+        {
+            get { return "Deletes cache files no longer needed by the system"; }
+        }
+
+        /// <summary>
+        /// Gets the category.
+        /// </summary>
+        /// <value>The category.</value>
+        public override string Category
+        {
+            get
+            {
+                return "Maintenance";
+            }
+        }
+    }
+}