From 2d06095447b972c8c7239277428e2c67c8b7ca86 Mon Sep 17 00:00:00 2001
From: LukePulverenti <luke.pulverenti@gmail.com>
Date: Mon, 25 Feb 2013 22:43:04 -0500
Subject: plugin security fixes and other abstractions

---
 .../ScheduledTasks/Tasks/ImageCleanupTask.cs       | 220 +++++++++++++++++++++
 1 file changed, 220 insertions(+)
 create mode 100644 MediaBrowser.Server.Implementations/ScheduledTasks/Tasks/ImageCleanupTask.cs

(limited to 'MediaBrowser.Server.Implementations/ScheduledTasks/Tasks/ImageCleanupTask.cs')

diff --git a/MediaBrowser.Server.Implementations/ScheduledTasks/Tasks/ImageCleanupTask.cs b/MediaBrowser.Server.Implementations/ScheduledTasks/Tasks/ImageCleanupTask.cs
new file mode 100644
index 000000000..57f69e2e3
--- /dev/null
+++ b/MediaBrowser.Server.Implementations/ScheduledTasks/Tasks/ImageCleanupTask.cs
@@ -0,0 +1,220 @@
+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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