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using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.ScheduledTasks;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using CommonIO;
using MediaBrowser.Common.IO;
namespace MediaBrowser.Server.Implementations.ScheduledTasks
{
/// <summary>
/// Class ChapterImagesTask
/// </summary>
class ChapterImagesTask : IScheduledTask
{
/// <summary>
/// The _logger
/// </summary>
private readonly ILogger _logger;
/// <summary>
/// The _library manager
/// </summary>
private readonly ILibraryManager _libraryManager;
/// <summary>
/// The current new item timer
/// </summary>
/// <value>The new item timer.</value>
private Timer NewItemTimer { get; set; }
private readonly IItemRepository _itemRepo;
private readonly IApplicationPaths _appPaths;
private readonly IEncodingManager _encodingManager;
private readonly IFileSystem _fileSystem;
/// <summary>
/// Initializes a new instance of the <see cref="ChapterImagesTask" /> class.
/// </summary>
/// <param name="logManager">The log manager.</param>
/// <param name="libraryManager">The library manager.</param>
/// <param name="itemRepo">The item repo.</param>
public ChapterImagesTask(ILogManager logManager, ILibraryManager libraryManager, IItemRepository itemRepo, IApplicationPaths appPaths, IEncodingManager encodingManager, IFileSystem fileSystem)
{
_logger = logManager.GetLogger(GetType().Name);
_libraryManager = libraryManager;
_itemRepo = itemRepo;
_appPaths = appPaths;
_encodingManager = encodingManager;
_fileSystem = fileSystem;
}
/// <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(1),
TaskOptions = new TaskExecutionOptions
{
MaxRuntimeMs = Convert.ToInt32(TimeSpan.FromHours(4).TotalMilliseconds)
}
}
};
}
/// <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)
{
var videos = _libraryManager.RootFolder.GetRecursiveChildren(i => i is Video)
.Cast<Video>()
.ToList();
var numComplete = 0;
var failHistoryPath = Path.Combine(_appPaths.CachePath, "chapter-failures.txt");
List<string> previouslyFailedImages;
try
{
previouslyFailedImages = _fileSystem.ReadAllText(failHistoryPath)
.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries)
.ToList();
}
catch (FileNotFoundException)
{
previouslyFailedImages = new List<string>();
}
catch (DirectoryNotFoundException)
{
previouslyFailedImages = new List<string>();
}
foreach (var video in videos)
{
cancellationToken.ThrowIfCancellationRequested();
var key = video.Path + video.DateModified.Ticks;
var extract = !previouslyFailedImages.Contains(key, StringComparer.OrdinalIgnoreCase);
var chapters = _itemRepo.GetChapters(video.Id).ToList();
var success = await _encodingManager.RefreshChapterImages(new ChapterImageRefreshOptions
{
SaveChapters = true,
ExtractImages = extract,
Video = video,
Chapters = chapters
}, CancellationToken.None);
if (!success)
{
previouslyFailedImages.Add(key);
var parentPath = Path.GetDirectoryName(failHistoryPath);
_fileSystem.CreateDirectory(parentPath);
_fileSystem.WriteAllText(failHistoryPath, string.Join("|", previouslyFailedImages.ToArray()));
}
numComplete++;
double percent = numComplete;
percent /= videos.Count;
progress.Report(100 * percent);
}
}
/// <summary>
/// Gets the name of the task
/// </summary>
/// <value>The name.</value>
public string Name
{
get
{
return "Chapter image extraction";
}
}
/// <summary>
/// Gets the description.
/// </summary>
/// <value>The description.</value>
public string Description
{
get { return "Creates thumbnails for videos that have chapters."; }
}
/// <summary>
/// Gets the category.
/// </summary>
/// <value>The category.</value>
public string Category
{
get
{
return "Library";
}
}
}
}
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