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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.Dto;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Tasks;
using Microsoft.Extensions.Logging;
namespace Emby.Server.Implementations.ScheduledTasks
{
/// <summary>
/// Class ChapterImagesTask
/// </summary>
public class ChapterImagesTask : IScheduledTask
{
/// <summary>
/// The _logger
/// </summary>
private readonly ILogger _logger;
/// <summary>
/// The _library manager
/// </summary>
private readonly ILibraryManager _libraryManager;
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>
public ChapterImagesTask(ILoggerFactory loggerFactory, ILibraryManager libraryManager, IItemRepository itemRepo, IApplicationPaths appPaths, IEncodingManager encodingManager, IFileSystem fileSystem)
{
_logger = loggerFactory.CreateLogger(GetType().Name);
_libraryManager = libraryManager;
_itemRepo = itemRepo;
_appPaths = appPaths;
_encodingManager = encodingManager;
_fileSystem = fileSystem;
}
/// <summary>
/// Creates the triggers that define when the task will run
/// </summary>
public IEnumerable<TaskTriggerInfo> GetDefaultTriggers()
{
return new[] {
new TaskTriggerInfo
{
Type = TaskTriggerInfo.TriggerDaily,
TimeOfDayTicks = TimeSpan.FromHours(2).Ticks,
MaxRuntimeTicks = TimeSpan.FromHours(4).Ticks
}
};
}
/// <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.GetItemList(new InternalItemsQuery
{
MediaTypes = new[] { MediaType.Video },
IsFolder = false,
Recursive = true,
DtoOptions = new DtoOptions(false)
{
EnableImages = false
},
SourceTypes = new SourceType[] { SourceType.Library },
HasChapterImages = false,
IsVirtualItem = false
})
.OfType<Video>()
.ToList();
var numComplete = 0;
var failHistoryPath = Path.Combine(_appPaths.CachePath, "chapter-failures.txt");
List<string> previouslyFailedImages;
if (File.Exists(failHistoryPath))
{
try
{
previouslyFailedImages = File.ReadAllText(failHistoryPath)
.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries)
.ToList();
}
catch (IOException)
{
previouslyFailedImages = new List<string>();
}
}
else
{
previouslyFailedImages = new List<string>();
}
var directoryService = new DirectoryService(_logger, _fileSystem);
foreach (var video in videos)
{
cancellationToken.ThrowIfCancellationRequested();
var key = video.Path + video.DateModified.Ticks;
var extract = !previouslyFailedImages.Contains(key, StringComparer.OrdinalIgnoreCase);
try
{
var chapters = _itemRepo.GetChapters(video);
var success = await _encodingManager.RefreshChapterImages(video, directoryService, chapters, extract, true, cancellationToken).ConfigureAwait(false);
if (!success)
{
previouslyFailedImages.Add(key);
var parentPath = Path.GetDirectoryName(failHistoryPath);
Directory.CreateDirectory(parentPath);
string text = string.Join("|", previouslyFailedImages);
File.WriteAllText(failHistoryPath, text);
}
numComplete++;
double percent = numComplete;
percent /= videos.Count;
progress.Report(100 * percent);
}
catch (ObjectDisposedException)
{
//TODO Investigate and properly fix.
break;
}
}
}
public string Name => "Chapter image extraction";
public string Description => "Creates thumbnails for videos that have chapters.";
public string Category => "Library";
public string Key => "RefreshChapterImages";
public bool IsHidden => false;
public bool IsEnabled => true;
public bool IsLogged => true;
}
}
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