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84 lines
2.1 KiB
C#
84 lines
2.1 KiB
C#
using MediaBrowser.Common.IO;
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using MediaBrowser.Controller.Providers;
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using System;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Providers
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{
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public abstract class BaseXmlProvider<T> : ILocalMetadataProvider<T>, IHasChangeMonitor
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where T : IHasMetadata, new()
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{
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protected IFileSystem FileSystem;
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public async Task<MetadataResult<T>> GetMetadata(ItemInfo info, CancellationToken cancellationToken)
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{
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var result = new MetadataResult<T>();
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var file = GetXmlFile(info);
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if (file == null)
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{
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return result;
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}
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var path = file.FullName;
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await XmlProviderUtils.XmlParsingResourcePool.WaitAsync(cancellationToken).ConfigureAwait(false);
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try
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{
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result.Item = new T();
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Fetch(result.Item, path, cancellationToken);
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result.HasMetadata = true;
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}
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catch (FileNotFoundException)
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{
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result.HasMetadata = false;
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}
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finally
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{
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XmlProviderUtils.XmlParsingResourcePool.Release();
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}
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return result;
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}
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protected abstract void Fetch(T item, string path, CancellationToken cancellationToken);
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protected BaseXmlProvider(IFileSystem fileSystem)
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{
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FileSystem = fileSystem;
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}
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protected abstract FileInfo GetXmlFile(ItemInfo info);
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public bool HasChanged(IHasMetadata item, DateTime date)
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{
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var file = GetXmlFile(new ItemInfo { IsInMixedFolder = item.IsInMixedFolder, Path = item.Path });
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if (file == null)
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{
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return false;
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}
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return FileSystem.GetLastWriteTimeUtc(file) > date;
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}
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public string Name
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{
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get
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{
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return "Media Browser Xml";
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}
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}
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}
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static class XmlProviderUtils
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{
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internal static readonly SemaphoreSlim XmlParsingResourcePool = new SemaphoreSlim(4, 4);
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}
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}
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