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100 lines
2.7 KiB
C#
100 lines
2.7 KiB
C#
using MediaBrowser.Common.IO;
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using MediaBrowser.Controller.Entities;
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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.LocalMetadata
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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<LocalMetadataResult<T>> GetMetadata(ItemInfo info,
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IDirectoryService directoryService,
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CancellationToken cancellationToken)
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{
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var result = new LocalMetadataResult<T>();
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var file = GetXmlFile(info, directoryService);
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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, 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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catch (DirectoryNotFoundException)
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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(LocalMetadataResult<T> result, 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 FileSystemInfo GetXmlFile(ItemInfo info, IDirectoryService directoryService);
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public bool HasChanged(IHasMetadata item, IDirectoryService directoryService, DateTime date)
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{
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var file = GetXmlFile(new ItemInfo { IsInMixedFolder = item.IsInMixedFolder, Path = item.Path }, directoryService);
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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 file.Exists && 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 XmlProviderUtils.Name;
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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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public static string Name
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{
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get
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{
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return "Media Browser Legacy Xml";
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}
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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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