jellyfin-server/MediaBrowser.Providers/TV/TheTVDB/TvDbClientManager.cs

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C#
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using System;
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using System.Threading;
using System.Threading.Tasks;
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using MediaBrowser.Controller.Library;
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using Microsoft.Extensions.Caching.Memory;
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using TvDbSharper;
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using TvDbSharper.Dto;
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namespace MediaBrowser.Providers.TV
{
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// TODO add to DI once Bond's PR is merged
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public sealed class TvDbClientManager
{
private static volatile TvDbClientManager instance;
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// TODO add to DI once Bond's PR is merged
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private readonly SemaphoreSlim _cacheWriteLock = new SemaphoreSlim(1, 1);
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private static MemoryCache _cache;
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private static readonly object syncRoot = new object();
private static TvDbClient tvDbClient;
private static DateTime tokenCreatedAt;
private TvDbClientManager()
{
tvDbClient = new TvDbClient();
tvDbClient.Authentication.AuthenticateAsync(TVUtils.TvdbApiKey);
tokenCreatedAt = DateTime.Now;
}
public static TvDbClientManager Instance
{
get
{
if (instance != null)
{
return instance;
}
lock (syncRoot)
{
if (instance == null)
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{
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instance = new TvDbClientManager();
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_cache = new MemoryCache(new MemoryCacheOptions());
}
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}
return instance;
}
}
public TvDbClient TvDbClient
{
get
{
// Refresh if necessary
if (tokenCreatedAt > DateTime.Now.Subtract(TimeSpan.FromHours(20)))
{
try
{
tvDbClient.Authentication.RefreshTokenAsync();
}
catch
{
tvDbClient.Authentication.AuthenticateAsync(TVUtils.TvdbApiKey);
}
tokenCreatedAt = DateTime.Now;
}
// Default to English
tvDbClient.AcceptedLanguage = "en";
return tvDbClient;
}
}
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public Task<TvDbResponse<SeriesSearchResult[]>> GetSeriesByNameAsync(string name, CancellationToken cancellationToken)
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{
return TryGetValue("series" + name,() => TvDbClient.Search.SearchSeriesByNameAsync(name, cancellationToken));
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}
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public Task<TvDbResponse<Series>> GetSeriesByIdAsync(int tvdbId, CancellationToken cancellationToken)
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{
return TryGetValue("series" + tvdbId,() => TvDbClient.Series.GetAsync(tvdbId, cancellationToken));
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}
public Task<TvDbResponse<EpisodeRecord>> GetEpisodesAsync(int episodeTvdbId, CancellationToken cancellationToken)
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{
return TryGetValue("episode" + episodeTvdbId,() => TvDbClient.Episodes.GetAsync(episodeTvdbId, cancellationToken));
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}
public Task<TvDbResponse<SeriesSearchResult[]>> GetSeriesByImdbIdAsync(string imdbId, CancellationToken cancellationToken)
{
return TryGetValue("series" + imdbId,() => TvDbClient.Search.SearchSeriesByImdbIdAsync(imdbId, cancellationToken));
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}
public Task<TvDbResponse<SeriesSearchResult[]>> GetSeriesByZap2ItIdAsync(string zap2ItId, CancellationToken cancellationToken)
{
return TryGetValue("series" + zap2ItId,() => TvDbClient.Search.SearchSeriesByImdbIdAsync(zap2ItId, cancellationToken));
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}
public Task<TvDbResponse<Actor[]>> GetActorsAsync(int tvdbId, CancellationToken cancellationToken)
{
return TryGetValue("actors" + tvdbId,() => TvDbClient.Series.GetActorsAsync(tvdbId, cancellationToken));
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}
public Task<TvDbResponse<Image[]>> GetImagesAsync(int tvdbId, ImagesQuery imageQuery, CancellationToken cancellationToken)
{
return TryGetValue("images" + tvdbId,() => TvDbClient.Series.GetImagesAsync(tvdbId, imageQuery, cancellationToken));
}
public Task<TvDbResponse<Language[]>> GetLanguagesAsync(CancellationToken cancellationToken)
{
return TryGetValue("languages",() => TvDbClient.Languages.GetAllAsync(cancellationToken));
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}
private async Task<T> TryGetValue<T>(object key, Func<Task<T>> resultFactory)
{
if (_cache.TryGetValue(key, out T cachedValue))
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{
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return cachedValue;
}
await _cacheWriteLock.WaitAsync().ConfigureAwait(false);
try
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{
if (_cache.TryGetValue(key, out cachedValue))
{
return cachedValue;
}
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var result = await resultFactory.Invoke();
_cache.Set(key, result, TimeSpan.FromHours(1));
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return result;
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}
finally
{
_cacheWriteLock.Release();
}
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}
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}
}