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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Controller.Dto;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.MediaEncoding;
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using MediaBrowser.Controller.Persistence;
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using MediaBrowser.Controller.Providers;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Tasks;
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using MediaBrowser.Model.Globalization;
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namespace Emby.Server.Implementations.ScheduledTasks
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{
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/// <summary>
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/// Class ChapterImagesTask.
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/// </summary>
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public class ChapterImagesTask : IScheduledTask
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{
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/// <summary>
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/// The _library manager.
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/// </summary>
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private readonly ILibraryManager _libraryManager;
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private readonly IItemRepository _itemRepo;
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private readonly IApplicationPaths _appPaths;
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private readonly IEncodingManager _encodingManager;
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private readonly IFileSystem _fileSystem;
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private readonly ILocalizationManager _localization;
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/// <summary>
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/// Initializes a new instance of the <see cref="ChapterImagesTask" /> class.
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/// </summary>
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public ChapterImagesTask(
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ILibraryManager libraryManager,
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IItemRepository itemRepo,
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IApplicationPaths appPaths,
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IEncodingManager encodingManager,
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IFileSystem fileSystem,
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ILocalizationManager localization)
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{
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_libraryManager = libraryManager;
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_itemRepo = itemRepo;
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_appPaths = appPaths;
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_encodingManager = encodingManager;
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_fileSystem = fileSystem;
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_localization = localization;
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}
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/// <summary>
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/// Creates the triggers that define when the task will run.
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/// </summary>
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public IEnumerable<TaskTriggerInfo> GetDefaultTriggers()
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{
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return new[]
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{
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new TaskTriggerInfo
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{
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Type = TaskTriggerInfo.TriggerDaily,
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TimeOfDayTicks = TimeSpan.FromHours(2).Ticks,
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MaxRuntimeTicks = TimeSpan.FromHours(4).Ticks
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}
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};
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}
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/// <summary>
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/// Returns the task to be executed.
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/// </summary>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <param name="progress">The progress.</param>
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/// <returns>Task.</returns>
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public async Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
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{
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var videos = _libraryManager.GetItemList(new InternalItemsQuery
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{
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MediaTypes = new[] { MediaType.Video },
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IsFolder = false,
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Recursive = true,
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DtoOptions = new DtoOptions(false)
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{
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EnableImages = false
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},
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SourceTypes = new SourceType[] { SourceType.Library },
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HasChapterImages = false,
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IsVirtualItem = false
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})
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.OfType<Video>()
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.ToList();
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var numComplete = 0;
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var failHistoryPath = Path.Combine(_appPaths.CachePath, "chapter-failures.txt");
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List<string> previouslyFailedImages;
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if (File.Exists(failHistoryPath))
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{
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try
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{
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previouslyFailedImages = File.ReadAllText(failHistoryPath)
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.Split('|', StringSplitOptions.RemoveEmptyEntries)
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.ToList();
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}
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catch (IOException)
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{
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previouslyFailedImages = new List<string>();
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}
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}
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else
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{
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previouslyFailedImages = new List<string>();
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}
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var directoryService = new DirectoryService(_fileSystem);
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foreach (var video in videos)
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{
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cancellationToken.ThrowIfCancellationRequested();
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var key = video.Path + video.DateModified.Ticks;
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var extract = !previouslyFailedImages.Contains(key, StringComparer.OrdinalIgnoreCase);
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try
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{
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var chapters = _itemRepo.GetChapters(video);
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var success = await _encodingManager.RefreshChapterImages(video, directoryService, chapters, extract, true, cancellationToken).ConfigureAwait(false);
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if (!success)
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{
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previouslyFailedImages.Add(key);
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var parentPath = Path.GetDirectoryName(failHistoryPath);
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Directory.CreateDirectory(parentPath);
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string text = string.Join("|", previouslyFailedImages);
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File.WriteAllText(failHistoryPath, text);
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}
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numComplete++;
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double percent = numComplete;
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percent /= videos.Count;
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progress.Report(100 * percent);
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}
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catch (ObjectDisposedException)
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{
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// TODO Investigate and properly fix.
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break;
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}
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}
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}
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/// <inheritdoc />
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public string Name => _localization.GetLocalizedString("TaskRefreshChapterImages");
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/// <inheritdoc />
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public string Description => _localization.GetLocalizedString("TaskRefreshChapterImagesDescription");
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/// <inheritdoc />
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public string Category => _localization.GetLocalizedString("TasksLibraryCategory");
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/// <inheritdoc />
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public string Key => "RefreshChapterImages";
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/// <inheritdoc />
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public bool IsHidden => false;
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/// <inheritdoc />
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public bool IsEnabled => true;
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/// <inheritdoc />
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public bool IsLogged => true;
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}
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}
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