387 lines
15 KiB
C#
387 lines
15 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Entities.TV;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Providers;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Globalization;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Providers.TV.TheTVDB;
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using Microsoft.Extensions.Logging;
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namespace MediaBrowser.Providers.TV
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{
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public class MissingEpisodeProvider
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{
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private const double UnairedEpisodeThresholdDays = 2;
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private readonly IServerConfigurationManager _config;
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private readonly ILogger _logger;
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private readonly ILibraryManager _libraryManager;
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private readonly ILocalizationManager _localization;
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private readonly IFileSystem _fileSystem;
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private readonly TvDbClientManager _tvDbClientManager;
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public MissingEpisodeProvider(
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ILogger logger,
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IServerConfigurationManager config,
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ILibraryManager libraryManager,
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ILocalizationManager localization,
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IFileSystem fileSystem,
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TvDbClientManager tvDbClientManager)
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{
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_logger = logger;
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_config = config;
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_libraryManager = libraryManager;
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_localization = localization;
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_fileSystem = fileSystem;
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_tvDbClientManager = tvDbClientManager;
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}
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public async Task<bool> Run(Series series, bool addNewItems, CancellationToken cancellationToken)
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{
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var tvdbId = series.GetProviderId(MetadataProviders.Tvdb);
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if (string.IsNullOrEmpty(tvdbId))
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{
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return false;
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}
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var episodes = await _tvDbClientManager.GetAllEpisodesAsync(Convert.ToInt32(tvdbId), series.GetPreferredMetadataLanguage(), cancellationToken);
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var episodeLookup = episodes
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.Select(i =>
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{
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DateTime.TryParse(i.FirstAired, out var firstAired);
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var seasonNumber = i.AiredSeason.GetValueOrDefault(-1);
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var episodeNumber = i.AiredEpisodeNumber.GetValueOrDefault(-1);
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return (seasonNumber, episodeNumber, firstAired);
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})
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.Where(i => i.seasonNumber != -1 && i.episodeNumber != -1)
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.OrderBy(i => i.seasonNumber)
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.ThenBy(i => i.episodeNumber)
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.ToList();
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var allRecursiveChildren = series.GetRecursiveChildren();
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var hasBadData = HasInvalidContent(allRecursiveChildren);
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// Be conservative here to avoid creating missing episodes for ones they already have
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var addMissingEpisodes = !hasBadData && _libraryManager.GetLibraryOptions(series).ImportMissingEpisodes;
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var anySeasonsRemoved = RemoveObsoleteOrMissingSeasons(allRecursiveChildren, episodeLookup);
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if (anySeasonsRemoved)
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{
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// refresh this
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allRecursiveChildren = series.GetRecursiveChildren();
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}
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var anyEpisodesRemoved = RemoveObsoleteOrMissingEpisodes(allRecursiveChildren, episodeLookup, addMissingEpisodes);
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if (anyEpisodesRemoved)
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{
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// refresh this
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allRecursiveChildren = series.GetRecursiveChildren();
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}
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var hasNewEpisodes = false;
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if (addNewItems && series.IsMetadataFetcherEnabled(_libraryManager.GetLibraryOptions(series), TvdbSeriesProvider.Current.Name))
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{
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hasNewEpisodes = await AddMissingEpisodes(series, allRecursiveChildren, addMissingEpisodes, episodeLookup, cancellationToken)
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.ConfigureAwait(false);
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}
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if (hasNewEpisodes || anySeasonsRemoved || anyEpisodesRemoved)
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{
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return true;
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}
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return false;
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}
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/// <summary>
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/// Returns true if a series has any seasons or episodes without season or episode numbers
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/// If this data is missing no virtual items will be added in order to prevent possible duplicates
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/// </summary>
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private bool HasInvalidContent(IList<BaseItem> allItems)
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{
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return allItems.OfType<Season>().Any(i => !i.IndexNumber.HasValue) ||
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allItems.OfType<Episode>().Any(i =>
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{
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if (!i.ParentIndexNumber.HasValue)
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{
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return true;
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}
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// You could have episodes under season 0 with no number
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return false;
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});
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}
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private async Task<bool> AddMissingEpisodes(
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Series series,
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IEnumerable<BaseItem> allItems,
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bool addMissingEpisodes,
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IReadOnlyCollection<(int seasonNumber, int episodenumber, DateTime firstAired)> episodeLookup,
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CancellationToken cancellationToken)
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{
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var existingEpisodes = allItems.OfType<Episode>().ToList();
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var seasonCounts = episodeLookup.GroupBy(e => e.seasonNumber).ToDictionary(g => g.Key, g => g.Count());
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var hasChanges = false;
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foreach (var tuple in episodeLookup)
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{
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if (tuple.seasonNumber <= 0 || tuple.episodenumber <= 0)
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{
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// Ignore episode/season zeros
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continue;
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}
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var existingEpisode = GetExistingEpisode(existingEpisodes, seasonCounts, tuple);
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if (existingEpisode != null)
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{
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continue;
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}
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var airDate = tuple.firstAired;
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var now = DateTime.UtcNow.AddDays(-UnairedEpisodeThresholdDays);
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if (airDate < now && addMissingEpisodes || airDate > now)
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{
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// tvdb has a lot of nearly blank episodes
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_logger.LogInformation("Creating virtual missing/unaired episode {0} {1}x{2}", series.Name, tuple.seasonNumber, tuple.episodenumber);
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await AddEpisode(series, tuple.seasonNumber, tuple.episodenumber, cancellationToken).ConfigureAwait(false);
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hasChanges = true;
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}
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}
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return hasChanges;
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}
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/// <summary>
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/// Removes the virtual entry after a corresponding physical version has been added
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/// </summary>
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private bool RemoveObsoleteOrMissingEpisodes(
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IEnumerable<BaseItem> allRecursiveChildren,
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IEnumerable<(int seasonNumber, int episodeNumber, DateTime firstAired)> episodeLookup,
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bool allowMissingEpisodes)
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{
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var existingEpisodes = allRecursiveChildren.OfType<Episode>();
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var physicalEpisodes = new List<Episode>();
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var virtualEpisodes = new List<Episode>();
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foreach (var episode in existingEpisodes)
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{
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if (episode.LocationType == LocationType.Virtual)
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{
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virtualEpisodes.Add(episode);
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}
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else
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{
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physicalEpisodes.Add(episode);
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}
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}
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var episodesToRemove = virtualEpisodes
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.Where(i =>
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{
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if (!i.IndexNumber.HasValue || !i.ParentIndexNumber.HasValue)
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{
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return true;
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}
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var seasonNumber = i.ParentIndexNumber.Value;
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var episodeNumber = i.IndexNumber.Value;
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// If there's a physical episode with the same season and episode number, delete it
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if (physicalEpisodes.Any(p =>
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p.ParentIndexNumber.HasValue && p.ParentIndexNumber.Value == seasonNumber &&
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p.ContainsEpisodeNumber(episodeNumber)))
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{
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return true;
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}
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// If the episode no longer exists in the remote lookup, delete it
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if (!episodeLookup.Any(e => e.seasonNumber == seasonNumber && e.episodeNumber == episodeNumber))
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{
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return true;
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}
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// If it's missing, but not unaired, remove it
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return !allowMissingEpisodes && i.IsMissingEpisode &&
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(!i.PremiereDate.HasValue ||
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i.PremiereDate.Value.ToLocalTime().Date.AddDays(UnairedEpisodeThresholdDays) <
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DateTime.Now.Date);
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});
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var hasChanges = false;
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foreach (var episodeToRemove in episodesToRemove)
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{
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_libraryManager.DeleteItem(episodeToRemove, new DeleteOptions
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{
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DeleteFileLocation = true
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}, false);
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hasChanges = true;
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}
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return hasChanges;
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}
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/// <summary>
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/// Removes the obsolete or missing seasons.
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/// </summary>
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/// <param name="allRecursiveChildren"></param>
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/// <param name="episodeLookup">The episode lookup.</param>
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/// <returns><see cref="bool" />.</returns>
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private bool RemoveObsoleteOrMissingSeasons(
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IList<BaseItem> allRecursiveChildren,
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IEnumerable<(int seasonNumber, int episodeNumber, DateTime firstAired)> episodeLookup)
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{
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var existingSeasons = allRecursiveChildren.OfType<Season>().ToList();
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var physicalSeasons = new List<Season>();
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var virtualSeasons = new List<Season>();
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foreach (var season in existingSeasons)
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{
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if (season.LocationType == LocationType.Virtual)
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{
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virtualSeasons.Add(season);
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}
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else
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{
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physicalSeasons.Add(season);
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}
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}
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var allEpisodes = allRecursiveChildren.OfType<Episode>().ToList();
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var seasonsToRemove = virtualSeasons
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.Where(i =>
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{
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if (i.IndexNumber.HasValue)
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{
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var seasonNumber = i.IndexNumber.Value;
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// If there's a physical season with the same number, delete it
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if (physicalSeasons.Any(p => p.IndexNumber.HasValue && p.IndexNumber.Value == seasonNumber && string.Equals(p.Series.PresentationUniqueKey, i.Series.PresentationUniqueKey, StringComparison.Ordinal)))
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{
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return true;
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}
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// If the season no longer exists in the remote lookup, delete it, but only if an existing episode doesn't require it
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return episodeLookup.All(e => e.seasonNumber != seasonNumber) && allEpisodes.All(s => s.ParentIndexNumber != seasonNumber || s.IsInSeasonFolder);
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}
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// Season does not have a number
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// Remove if there are no episodes directly in series without a season number
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return allEpisodes.All(s => s.ParentIndexNumber.HasValue || s.IsInSeasonFolder);
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});
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var hasChanges = false;
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foreach (var seasonToRemove in seasonsToRemove)
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{
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_libraryManager.DeleteItem(seasonToRemove, new DeleteOptions
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{
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DeleteFileLocation = true
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}, false);
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hasChanges = true;
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}
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return hasChanges;
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}
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/// <summary>
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/// Adds the episode.
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/// </summary>
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/// <param name="series">The series.</param>
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/// <param name="seasonNumber">The season number.</param>
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/// <param name="episodeNumber">The episode number.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task.</returns>
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private async Task AddEpisode(Series series, int seasonNumber, int episodeNumber, CancellationToken cancellationToken)
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{
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var season = series.Children.OfType<Season>()
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.FirstOrDefault(i => i.IndexNumber.HasValue && i.IndexNumber.Value == seasonNumber);
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if (season == null)
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{
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var provider = new DummySeasonProvider(_logger, _localization, _libraryManager, _fileSystem);
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season = await provider.AddSeason(series, seasonNumber, true, cancellationToken).ConfigureAwait(false);
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}
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var name = "Episode " + episodeNumber.ToString(CultureInfo.InvariantCulture);
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var episode = new Episode
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{
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Name = name,
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IndexNumber = episodeNumber,
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ParentIndexNumber = seasonNumber,
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Id = _libraryManager.GetNewItemId(
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series.Id + seasonNumber.ToString(CultureInfo.InvariantCulture) + name,
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typeof(Episode)),
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IsVirtualItem = true,
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SeasonId = season?.Id ?? Guid.Empty,
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SeriesId = series.Id
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};
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season.AddChild(episode, cancellationToken);
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await episode.RefreshMetadata(new MetadataRefreshOptions(new DirectoryService(_fileSystem)), cancellationToken).ConfigureAwait(false);
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}
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/// <summary>
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/// Gets the existing episode.
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/// </summary>
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/// <param name="existingEpisodes">The existing episodes.</param>
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/// <param name="seasonCounts"></param>
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/// <param name="episodeTuple"></param>
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/// <returns>Episode.</returns>
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private Episode GetExistingEpisode(IEnumerable<Episode> existingEpisodes, IReadOnlyDictionary<int, int> seasonCounts, (int seasonNumber, int episodeNumber, DateTime firstAired) episodeTuple)
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{
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var seasonNumber = episodeTuple.seasonNumber;
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var episodeNumber = episodeTuple.episodeNumber;
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while (true)
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{
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var episode = GetExistingEpisode(existingEpisodes, seasonNumber, episodeNumber);
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if (episode != null)
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{
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return episode;
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}
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seasonNumber--;
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if (seasonCounts.ContainsKey(seasonNumber))
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{
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episodeNumber += seasonCounts[seasonNumber];
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}
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else
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{
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break;
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}
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}
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return null;
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}
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private Episode GetExistingEpisode(IEnumerable<Episode> existingEpisodes, int season, int episode)
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=> existingEpisodes.FirstOrDefault(i => i.ParentIndexNumber == season && i.ContainsEpisodeNumber(episode));
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}
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}
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