using MediaBrowser.Common.Kernel;
using MediaBrowser.Common.ScheduledTasks;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Common.Implementations.ScheduledTasks.Tasks
{
///
/// Deletes old cache files
///
public class DeleteCacheFileTask : BaseScheduledTask
{
///
/// Initializes a new instance of the class.
///
/// The kernel.
/// The task manager.
/// The logger.
public DeleteCacheFileTask(IKernel kernel, ITaskManager taskManager, ILogger logger)
: base(kernel, taskManager, logger)
{
}
///
/// Creates the triggers that define when the task will run
///
/// IEnumerable{BaseTaskTrigger}.
public override IEnumerable GetDefaultTriggers()
{
var trigger = new DailyTrigger { TimeOfDay = TimeSpan.FromHours(2) }; //2am
return new[] { trigger };
}
///
/// Returns the task to be executed
///
/// The cancellation token.
/// The progress.
/// Task.
protected override Task ExecuteInternal(CancellationToken cancellationToken, IProgress progress)
{
return Task.Run(() =>
{
var minDateModified = DateTime.UtcNow.AddMonths(-2);
DeleteCacheFilesFromDirectory(cancellationToken, Kernel.ApplicationPaths.CachePath, minDateModified, progress);
});
}
///
/// Deletes the cache files from directory with a last write time less than a given date
///
/// The task cancellation token.
/// The directory.
/// The min date modified.
/// The progress.
private void DeleteCacheFilesFromDirectory(CancellationToken cancellationToken, string directory, DateTime minDateModified, IProgress 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(100 * percent);
cancellationToken.ThrowIfCancellationRequested();
File.Delete(file.FullName);
index++;
}
progress.Report(100);
}
///
/// Gets the name of the task
///
/// The name.
public override string Name
{
get { return "Cache file cleanup"; }
}
///
/// Gets the description.
///
/// The description.
public override string Description
{
get { return "Deletes cache files no longer needed by the system"; }
}
///
/// Gets the category.
///
/// The category.
public override string Category
{
get
{
return "Maintenance";
}
}
}
}