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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Controller.IO;
using MediaBrowser.Model.Globalization;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Tasks;
using Microsoft.Extensions.Logging;
namespace Emby.Server.Implementations.ScheduledTasks.Tasks
{
/// <summary>
/// Deletes old cache files.
/// </summary>
public class DeleteCacheFileTask : IScheduledTask, IConfigurableScheduledTask
{
/// <summary>
/// Gets or sets the application paths.
/// </summary>
/// <value>The application paths.</value>
private readonly IApplicationPaths _applicationPaths;
private readonly ILogger<DeleteCacheFileTask> _logger;
private readonly IFileSystem _fileSystem;
private readonly ILocalizationManager _localization;
/// <summary>
/// Initializes a new instance of the <see cref="DeleteCacheFileTask" /> class.
/// </summary>
/// <param name="appPaths">Instance of the <see cref="IApplicationPaths"/> interface.</param>
/// <param name="logger">Instance of the <see cref="ILogger"/> interface.</param>
/// <param name="fileSystem">Instance of the <see cref="IFileSystem"/> interface.</param>
/// <param name="localization">Instance of the <see cref="ILocalizationManager"/> interface.</param>
public DeleteCacheFileTask(
IApplicationPaths appPaths,
ILogger<DeleteCacheFileTask> logger,
IFileSystem fileSystem,
ILocalizationManager localization)
{
_applicationPaths = appPaths;
_logger = logger;
_fileSystem = fileSystem;
_localization = localization;
}
/// <inheritdoc />
public string Name => _localization.GetLocalizedString("TaskCleanCache");
/// <inheritdoc />
public string Description => _localization.GetLocalizedString("TaskCleanCacheDescription");
/// <inheritdoc />
public string Category => _localization.GetLocalizedString("TasksMaintenanceCategory");
/// <inheritdoc />
public string Key => "DeleteCacheFiles";
/// <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 }
};
}
/// <inheritdoc />
public Task ExecuteAsync(IProgress<double> progress, CancellationToken cancellationToken)
{
var minDateModified = DateTime.UtcNow.AddDays(-30);
try
{
DeleteCacheFilesFromDirectory(_applicationPaths.CachePath, minDateModified, progress, cancellationToken);
}
catch (DirectoryNotFoundException)
{
// No biggie here. Nothing to delete
}
progress.Report(90);
minDateModified = DateTime.UtcNow.AddDays(-1);
try
{
DeleteCacheFilesFromDirectory(_applicationPaths.TempDirectory, minDateModified, progress, cancellationToken);
}
catch (DirectoryNotFoundException)
{
// No biggie here. Nothing to delete
}
return Task.CompletedTask;
}
/// <summary>
/// Deletes the cache files from directory with a last write time less than a given date.
/// </summary>
/// <param name="directory">The directory.</param>
/// <param name="minDateModified">The min date modified.</param>
/// <param name="progress">The progress.</param>
/// <param name="cancellationToken">The task cancellation token.</param>
private void DeleteCacheFilesFromDirectory(string directory, DateTime minDateModified, IProgress<double> progress, CancellationToken cancellationToken)
{
var filesToDelete = _fileSystem.GetFiles(directory, true)
.Where(f => _fileSystem.GetLastWriteTimeUtc(f) < minDateModified)
.ToList();
var index = 0;
foreach (var file in filesToDelete)
{
double percent = index;
percent /= filesToDelete.Count;
progress.Report(100 * percent);
cancellationToken.ThrowIfCancellationRequested();
FileSystemHelper.DeleteFile(_fileSystem, file.FullName, _logger);
index++;
}
FileSystemHelper.DeleteEmptyFolders(_fileSystem, directory, _logger);
progress.Report(100);
}
}
}
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