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using MediaBrowser.Common.ScheduledTasks;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.ScheduledTasks
{
/// <summary>
/// Class ChapterImagesTask
/// </summary>
class ChapterImagesTask : IScheduledTask
{
/// <summary>
/// The _kernel
/// </summary>
private readonly Kernel _kernel;
/// <summary>
/// The _logger
/// </summary>
private readonly ILogger _logger;
/// <summary>
/// The _library manager
/// </summary>
private readonly ILibraryManager _libraryManager;
/// <summary>
/// Initializes a new instance of the <see cref="ChapterImagesTask" /> class.
/// </summary>
/// <param name="kernel">The kernel.</param>
/// <param name="logger">The logger.</param>
/// <param name="libraryManager">The library manager.</param>
public ChapterImagesTask(Kernel kernel, ILogger logger, ILibraryManager libraryManager)
{
_kernel = kernel;
_logger = logger;
_libraryManager = libraryManager;
}
/// <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(4) }
};
}
/// <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 Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
{
var videos = _libraryManager.RootFolder.RecursiveChildren.OfType<Video>().Where(v => v.Chapters != null).ToList();
var numComplete = 0;
var tasks = videos.Select(v => Task.Run(async () =>
{
try
{
await _kernel.FFMpegManager.PopulateChapterImages(v, cancellationToken, true, true);
}
catch (OperationCanceledException)
{
throw;
}
catch (Exception ex)
{
_logger.ErrorException("Error creating chapter images for {0}", ex, v.Name);
}
finally
{
lock (progress)
{
numComplete++;
double percent = numComplete;
percent /= videos.Count;
progress.Report(100 * percent);
}
}
}));
return Task.WhenAll(tasks);
}
/// <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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