jellyfin-server/MediaBrowser.Controller/Providers/TV/EpisodeProviderFromXml.cs
2013-02-20 20:33:05 -05:00

123 lines
4.3 KiB
C#

using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.TV;
using MediaBrowser.Model.Entities;
using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Controller.Providers.TV
{
/// <summary>
/// Class EpisodeProviderFromXml
/// </summary>
[Export(typeof(BaseMetadataProvider))]
public class EpisodeProviderFromXml : BaseMetadataProvider
{
/// <summary>
/// Supportses the specified item.
/// </summary>
/// <param name="item">The item.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
public override bool Supports(BaseItem item)
{
return item is Episode && item.LocationType == LocationType.FileSystem;
}
/// <summary>
/// Gets the priority.
/// </summary>
/// <value>The priority.</value>
public override MetadataProviderPriority Priority
{
get { return MetadataProviderPriority.First; }
}
protected override bool RefreshOnFileSystemStampChange
{
get
{
return true;
}
}
/// <summary>
/// Fetches metadata and returns true or false indicating if any work that requires persistence was done
/// </summary>
/// <param name="item">The item.</param>
/// <param name="force">if set to <c>true</c> [force].</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task{System.Boolean}.</returns>
protected override Task<bool> FetchAsyncInternal(BaseItem item, bool force, CancellationToken cancellationToken)
{
return Task.Run(() => Fetch(item, cancellationToken));
}
/// <summary>
/// Override this to return the date that should be compared to the last refresh date
/// to determine if this provider should be re-fetched.
/// </summary>
/// <param name="item">The item.</param>
/// <returns>DateTime.</returns>
protected override DateTime CompareDate(BaseItem item)
{
var metadataFile = Path.Combine(item.MetaLocation, Path.ChangeExtension(Path.GetFileName(item.Path), ".xml"));
var file = item.ResolveArgs.Parent.ResolveArgs.GetMetaFileByPath(metadataFile);
if (!file.HasValue)
{
return base.CompareDate(item);
}
return file.Value.LastWriteTimeUtc;
}
/// <summary>
/// Fetches the specified item.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
private bool Fetch(BaseItem item, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var metadataFile = Path.Combine(item.MetaLocation, Path.ChangeExtension(Path.GetFileName(item.Path), ".xml"));
var episode = (Episode)item;
if (!FetchMetadata(episode, item.ResolveArgs.Parent, metadataFile, cancellationToken))
{
// Don't set last refreshed if we didn't do anything
return false;
}
SetLastRefreshed(item, DateTime.UtcNow);
return true;
}
/// <summary>
/// Fetches the metadata.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="parent">The parent.</param>
/// <param name="metadataFile">The metadata file.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
private bool FetchMetadata(Episode item, Folder parent, string metadataFile, CancellationToken cancellationToken)
{
var file = parent.ResolveArgs.GetMetaFileByPath(metadataFile);
if (!file.HasValue)
{
return false;
}
new EpisodeXmlParser().Fetch(item, metadataFile, cancellationToken);
return true;
}
}
}