jellyfin/MediaBrowser.Controller/Providers/Music/MusicArtistProviderFromJson.cs

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C#
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using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Serialization;
using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Controller.Providers.Music
{
public class MusicArtistProviderFromJson : BaseMetadataProvider
{
/// <summary>
/// Gets the json serializer.
/// </summary>
/// <value>The json serializer.</value>
protected IJsonSerializer JsonSerializer { get; private set; }
public MusicArtistProviderFromJson(IJsonSerializer jsonSerializer, ILogManager logManager, IServerConfigurationManager configurationManager)
: base(logManager, configurationManager)
{
if (jsonSerializer == null)
{
throw new ArgumentNullException("jsonSerializer");
}
JsonSerializer = jsonSerializer;
}
public override Task<bool> FetchAsync(BaseItem item, bool force, CancellationToken cancellationToken)
{
return Task.Run(() =>
{
cancellationToken.ThrowIfCancellationRequested();
var entry = item.ResolveArgs.GetMetaFileByPath(Path.Combine(item.MetaLocation, LastfmHelper.LocalArtistMetaFileName));
if (entry.HasValue)
{
// read in our saved meta and pass to processing function
var data = JsonSerializer.DeserializeFromFile<LastfmArtist>(entry.Value.Path);
cancellationToken.ThrowIfCancellationRequested();
LastfmHelper.ProcessArtistData(item, data);
item.SetProviderId(MetadataProviders.Musicbrainz, data.mbid);
SetLastRefreshed(item, DateTime.UtcNow);
return true;
}
return false;
});
}
public override MetadataProviderPriority Priority
{
get
{
return MetadataProviderPriority.First;
}
}
public override bool Supports(BaseItem item)
{
return item is MusicArtist;
}
public override bool RequiresInternet
{
get
{
return false;
}
}
protected override bool NeedsRefreshInternal(BaseItem item, BaseProviderInfo providerInfo)
{
if (!item.ResolveArgs.ContainsMetaFileByName(LastfmHelper.LocalArtistMetaFileName))
{
return false; // nothing to read
}
// Need to re-override to jump over intermediate implementation
return CompareDate(item) > providerInfo.LastRefreshed;
}
/// <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 entry = item.ResolveArgs.GetMetaFileByPath(Path.Combine(item.MetaLocation, LastfmHelper.LocalArtistMetaFileName));
return entry != null ? entry.Value.LastWriteTimeUtc : DateTime.MinValue;
}
}
}