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using MediaBrowser.Common.ScheduledTasks;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Movies;
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.Server.Implementations.ScheduledTasks.Tasks
{
/// <summary>
/// Class ImageCleanupTask
/// </summary>
public class ImageCleanupTask : IScheduledTask
{
/// <summary>
/// The _kernel
/// </summary>
private readonly Kernel _kernel;
/// <summary>
/// The _logger
/// </summary>
private readonly ILogger _logger;
/// <summary>
/// Initializes a new instance of the <see cref="ImageCleanupTask" /> class.
/// </summary>
/// <param name="kernel">The kernel.</param>
/// <param name="logger">The logger.</param>
public ImageCleanupTask(Kernel kernel, ILogger logger)
{
_kernel = kernel;
_logger = logger;
}
/// <summary>
/// Creates the triggers that define when the task will run
/// </summary>
/// <returns>IEnumerable{BaseTaskTrigger}.</returns>
public IEnumerable<ITaskTrigger> GetDefaultTriggers()
{
return new ITaskTrigger[]
{
new DailyTrigger { TimeOfDay = TimeSpan.FromHours(2) }
};
}
/// <summary>
/// Returns the task to be executed
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="progress">The progress.</param>
/// <returns>Task.</returns>
public async Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
{
await EnsureChapterImages(cancellationToken).ConfigureAwait(false);
// First gather all image files
var files = GetFiles(_kernel.FFMpegManager.AudioImagesDataPath)
.Concat(GetFiles(_kernel.FFMpegManager.VideoImagesDataPath))
.Concat(GetFiles(_kernel.ProviderManager.ImagesDataPath))
.ToList();
// Now gather all items
var items = _kernel.RootFolder.RecursiveChildren.ToList();
items.Add(_kernel.RootFolder);
// Determine all possible image paths
var pathsInUse = items.SelectMany(GetPathsInUse)
.Distinct(StringComparer.OrdinalIgnoreCase)
.ToDictionary(p => p, StringComparer.OrdinalIgnoreCase);
var numComplete = 0;
var tasks = files.Select(file => Task.Run(() =>
{
cancellationToken.ThrowIfCancellationRequested();
if (!pathsInUse.ContainsKey(file))
{
cancellationToken.ThrowIfCancellationRequested();
try
{
File.Delete(file);
}
catch (IOException ex)
{
_logger.ErrorException("Error deleting {0}", ex, file);
}
}
// Update progress
lock (progress)
{
numComplete++;
double percent = numComplete;
percent /= files.Count;
progress.Report(100 * percent);
}
}));
await Task.WhenAll(tasks).ConfigureAwait(false);
}
/// <summary>
/// Ensures the chapter images.
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
private Task EnsureChapterImages(CancellationToken cancellationToken)
{
var videos = _kernel.RootFolder.RecursiveChildren.OfType<Video>().Where(v => v.Chapters != null).ToList();
var tasks = videos.Select(v => Task.Run(async () =>
{
await _kernel.FFMpegManager.PopulateChapterImages(v, cancellationToken, false, true);
}));
return Task.WhenAll(tasks);
}
/// <summary>
/// Gets the paths in use.
/// </summary>
/// <param name="item">The item.</param>
/// <returns>IEnumerable{System.String}.</returns>
private IEnumerable<string> GetPathsInUse(BaseItem item)
{
IEnumerable<string> images = new List<string> { };
if (item.Images != null)
{
images = images.Concat(item.Images.Values);
}
if (item.BackdropImagePaths != null)
{
images = images.Concat(item.BackdropImagePaths);
}
if (item.ScreenshotImagePaths != null)
{
images = images.Concat(item.ScreenshotImagePaths);
}
var video = item as Video;
if (video != null && video.Chapters != null)
{
images = images.Concat(video.Chapters.Where(i => !string.IsNullOrEmpty(i.ImagePath)).Select(i => i.ImagePath));
}
if (item.LocalTrailers != null)
{
foreach (var subItem in item.LocalTrailers)
{
images = images.Concat(GetPathsInUse(subItem));
}
}
var movie = item as Movie;
if (movie != null && movie.SpecialFeatures != null)
{
foreach (var subItem in movie.SpecialFeatures)
{
images = images.Concat(GetPathsInUse(subItem));
}
}
return images;
}
/// <summary>
/// Gets the files.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>IEnumerable{System.String}.</returns>
private IEnumerable<string> GetFiles(string path)
{
return Directory.EnumerateFiles(path, "*.jpg", SearchOption.AllDirectories).Concat(Directory.EnumerateFiles(path, "*.png", SearchOption.AllDirectories));
}
/// <summary>
/// Gets the name of the task
/// </summary>
/// <value>The name.</value>
public string Name
{
get { return "Images cleanup"; }
}
/// <summary>
/// Gets the description.
/// </summary>
/// <value>The description.</value>
public string Description
{
get { return "Deletes downloaded and extracted images that are no longer being used."; }
}
/// <summary>
/// Gets the category.
/// </summary>
/// <value>The category.</value>
public string Category
{
get
{
return "Maintenance";
}
}
}
}
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