Metadata Downloading (#3525)

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Joe Milazzo 2025-02-05 16:16:44 -06:00 committed by GitHub
parent eb66763078
commit f4fd7230ea
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108 changed files with 6296 additions and 484 deletions

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@ -1,12 +1,14 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using API.Data;
using API.Data.Repositories;
using API.DTOs;
using API.DTOs.Collection;
using API.DTOs.KavitaPlus.ExternalMetadata;
using API.DTOs.KavitaPlus.Metadata;
using API.DTOs.Metadata.Matching;
using API.DTOs.Recommendation;
using API.DTOs.Scrobbling;
@ -16,6 +18,8 @@ using API.Entities.Enums;
using API.Entities.Metadata;
using API.Extensions;
using API.Helpers;
using API.Services.Tasks.Metadata;
using API.Services.Tasks.Scanner.Parser;
using API.SignalR;
using AutoMapper;
using Flurl.Http;
@ -33,7 +37,6 @@ public interface IExternalMetadataService
{
Task<ExternalSeriesDetailDto?> GetExternalSeriesDetail(int? aniListId, long? malId, int? seriesId);
Task<SeriesDetailPlusDto?> GetSeriesDetailPlus(int seriesId, LibraryType libraryType);
//Task ForceKavitaPlusRefresh(int seriesId);
Task FetchExternalDataTask();
/// <summary>
/// This is an entry point and provides a level of protection against calling upstream API. Will only allow 100 new
@ -46,7 +49,7 @@ public interface IExternalMetadataService
Task<IList<MalStackDto>> GetStacksForUser(int userId);
Task<IList<ExternalSeriesMatchDto>> MatchSeries(MatchSeriesDto dto);
Task FixSeriesMatch(int seriesId, ExternalSeriesDetailDto dto);
Task FixSeriesMatch(int seriesId, int anilistId);
Task UpdateSeriesDontMatch(int seriesId, bool dontMatch);
}
@ -58,6 +61,7 @@ public class ExternalMetadataService : IExternalMetadataService
private readonly ILicenseService _licenseService;
private readonly IScrobblingService _scrobblingService;
private readonly IEventHub _eventHub;
private readonly ICoverDbService _coverDbService;
private readonly TimeSpan _externalSeriesMetadataCache = TimeSpan.FromDays(30);
public static readonly HashSet<LibraryType> NonEligibleLibraryTypes =
[LibraryType.Comic, LibraryType.Book, LibraryType.Image, LibraryType.ComicVine];
@ -71,7 +75,7 @@ public class ExternalMetadataService : IExternalMetadataService
private static readonly RateLimiter RateLimiter = new RateLimiter(50, TimeSpan.FromHours(24), false);
public ExternalMetadataService(IUnitOfWork unitOfWork, ILogger<ExternalMetadataService> logger, IMapper mapper,
ILicenseService licenseService, IScrobblingService scrobblingService, IEventHub eventHub)
ILicenseService licenseService, IScrobblingService scrobblingService, IEventHub eventHub, ICoverDbService coverDbService)
{
_unitOfWork = unitOfWork;
_logger = logger;
@ -79,6 +83,7 @@ public class ExternalMetadataService : IExternalMetadataService
_licenseService = licenseService;
_scrobblingService = scrobblingService;
_eventHub = eventHub;
_coverDbService = coverDbService;
FlurlConfiguration.ConfigureClientForUrl(Configuration.KavitaPlusApiUrl);
}
@ -120,29 +125,6 @@ public class ExternalMetadataService : IExternalMetadataService
_logger.LogInformation("[Kavita+ Data Refresh] Finished Refreshing {Count} series data from Kavita+", count);
}
/// <summary>
/// Removes from Blacklist and Invalidates the cache
/// </summary>
/// <param name="seriesId"></param>
/// <returns></returns>
// public async Task ForceKavitaPlusRefresh(int seriesId)
// {
// // TODO: I think we can remove this now
// if (!await _licenseService.HasActiveLicense()) return;
// var libraryType = await _unitOfWork.LibraryRepository.GetLibraryTypeBySeriesIdAsync(seriesId);
// if (!IsPlusEligible(libraryType)) return;
//
// // Remove from Blacklist if applicable
// var series = await _unitOfWork.SeriesRepository.GetSeriesByIdAsync(seriesId);
// series!.IsBlacklisted = false;
// _unitOfWork.SeriesRepository.Update(series);
//
// var metadata = await _unitOfWork.ExternalSeriesMetadataRepository.GetExternalSeriesMetadata(seriesId);
// if (metadata == null) return;
//
// metadata.ValidUntilUtc = DateTime.UtcNow.Subtract(_externalSeriesMetadataCache);
// await _unitOfWork.CommitAsync();
// }
/// <summary>
/// Fetches data from Kavita+
@ -165,9 +147,7 @@ public class ExternalMetadataService : IExternalMetadataService
_logger.LogDebug("Prefetching Kavita+ data for Series {SeriesId}", seriesId);
// Prefetch SeriesDetail data
await GetSeriesDetailPlus(seriesId, libraryType);
// TODO: Fetch Series Metadata (Summary, etc)
var metadata = await GetSeriesDetailPlus(seriesId, libraryType);
}
@ -266,7 +246,13 @@ public class ExternalMetadataService : IExternalMetadataService
return string.Empty; // Return as is if null, empty, or whitespace.
}
return summary.Replace("<br/>", string.Empty);
// Remove all variations of <br> tags (case-insensitive)
summary = Regex.Replace(summary, @"<br\s*/?>", " ", RegexOptions.IgnoreCase | RegexOptions.Compiled);
// Normalize whitespace (replace multiple spaces with a single space)
summary = Regex.Replace(summary, @"\s+", " ").Trim();
return summary;
}
@ -329,8 +315,8 @@ public class ExternalMetadataService : IExternalMetadataService
/// This will override any sort of matching that was done prior and force it to be what the user Selected
/// </summary>
/// <param name="seriesId"></param>
/// <param name="dto"></param>
public async Task FixSeriesMatch(int seriesId, ExternalSeriesDetailDto dto)
/// <param name="anilistId"></param>
public async Task FixSeriesMatch(int seriesId, int anilistId)
{
var series = await _unitOfWork.SeriesRepository.GetSeriesByIdAsync(seriesId, SeriesIncludes.Library);
if (series == null) return;
@ -341,14 +327,18 @@ public class ExternalMetadataService : IExternalMetadataService
_unitOfWork.SeriesRepository.Update(series);
// Refetch metadata with a Direct lookup
await FetchExternalMetadataForSeries(seriesId, series.Library.Type, new PlusSeriesDto()
var metadata = await FetchExternalMetadataForSeries(seriesId, series.Library.Type, new PlusSeriesRequestDto()
{
SeriesName = dto.Name,
AniListId = dto.AniListId,
MalId = dto.MALId,
MediaFormat = dto.PlusMediaFormat,
AniListId = anilistId,
SeriesName = string.Empty // Required field
});
if (metadata.Series == null)
{
_logger.LogError("Unable to Match {SeriesName} with Kavita+ Series AniList Id: {AniListId}", series.Name, anilistId);
return;
}
// Find all scrobble events and rewrite them to be the correct
var events = await _unitOfWork.ScrobbleRepository.GetAllEventsForSeries(seriesId);
_unitOfWork.ScrobbleRepository.Remove(events);
@ -356,11 +346,12 @@ public class ExternalMetadataService : IExternalMetadataService
// Regenerate all events for the series for all users
BackgroundJob.Enqueue(() => _scrobblingService.CreateEventsFromExistingHistoryForSeries(seriesId));
await _eventHub.SendMessageAsync(MessageFactory.Info,
MessageFactory.InfoEvent($"Fix Match: {series.Name}", "Scrobble Events are regenerating with the new match"));
// await _eventHub.SendMessageAsync(MessageFactory.Info,
// MessageFactory.InfoEvent($"Fix Match: {series.Name}", "Scrobble Events are regenerating with the new match"));
_logger.LogInformation("Matched {SeriesName} with Kavita+ Series {MatchSeriesName}", series.Name, dto.Name);
// Name can be null on Series even with a direct match
_logger.LogInformation("Matched {SeriesName} with Kavita+ Series {MatchSeriesName}", series.Name, metadata.Series.Name);
}
/// <summary>
@ -398,15 +389,15 @@ public class ExternalMetadataService : IExternalMetadataService
/// <param name="libraryType"></param>
/// <param name="data"></param>
/// <returns></returns>
private async Task<SeriesDetailPlusDto> FetchExternalMetadataForSeries(int seriesId, LibraryType libraryType, PlusSeriesDto data)
private async Task<SeriesDetailPlusDto> FetchExternalMetadataForSeries(int seriesId, LibraryType libraryType, PlusSeriesRequestDto data)
{
var series = await _unitOfWork.SeriesRepository.GetSeriesByIdAsync(seriesId);
var series = await _unitOfWork.SeriesRepository.GetSeriesByIdAsync(seriesId, SeriesIncludes.Library);
if (series == null) return _defaultReturn;
try
{
_logger.LogDebug("Fetching Kavita+ Series Detail data for {SeriesName}", data.SeriesName);
_logger.LogDebug("Fetching Kavita+ Series Detail data for {SeriesName}", string.IsNullOrEmpty(data.SeriesName) ? data.AniListId : data.SeriesName);
var license = (await _unitOfWork.SettingsRepository.GetSettingAsync(ServerSettingKey.LicenseKey)).Value;
var result = await (Configuration.KavitaPlusApiUrl + "/api/metadata/v2/series-detail")
.WithKavitaPlusHeaders(license)
@ -415,7 +406,6 @@ public class ExternalMetadataService : IExternalMetadataService
// Clear out existing results
var externalSeriesMetadata = await GetOrCreateExternalSeriesMetadataForSeries(seriesId, series!);
_unitOfWork.ExternalSeriesMetadataRepository.Remove(externalSeriesMetadata.ExternalReviews);
_unitOfWork.ExternalSeriesMetadataRepository.Remove(externalSeriesMetadata.ExternalRatings);
@ -450,13 +440,33 @@ public class ExternalMetadataService : IExternalMetadataService
if (result.MalId.HasValue) externalSeriesMetadata.MalId = result.MalId.Value;
if (result.AniListId.HasValue) externalSeriesMetadata.AniListId = result.AniListId.Value;
// If there is metadata and the user has metadata download turned on
var madeMetadataModification = false;
if (result.Series != null && series.Library.AllowMetadataMatching)
{
madeMetadataModification = await WriteExternalMetadataToSeries(result.Series, seriesId);
if (madeMetadataModification)
{
_unitOfWork.SeriesRepository.Update(series);
}
}
await _unitOfWork.CommitAsync();
if (madeMetadataModification)
{
// Inform the UI of the update
await _eventHub.SendMessageAsync(MessageFactory.ScanSeries, MessageFactory.ScanSeriesEvent(series.LibraryId, series.Id, series.Name), false);
}
return new SeriesDetailPlusDto()
{
Recommendations = recs,
Ratings = result.Ratings,
Reviews = externalSeriesMetadata.ExternalReviews.Select(r => _mapper.Map<UserReviewDto>(r))
Reviews = externalSeriesMetadata.ExternalReviews.Select(r => _mapper.Map<UserReviewDto>(r)),
Series = result.Series
};
}
catch (FlurlHttpException ex)
@ -478,6 +488,413 @@ public class ExternalMetadataService : IExternalMetadataService
return _defaultReturn;
}
/// <summary>
/// Given external metadata from Kavita+, write as much as possible to the Kavita series as possible
/// </summary>
/// <param name="externalMetadata"></param>
/// <param name="seriesId"></param>
/// <returns></returns>
private async Task<bool> WriteExternalMetadataToSeries(ExternalSeriesDetailDto externalMetadata, int seriesId)
{
var settings = await _unitOfWork.SettingsRepository.GetMetadataSettingDto();
if (!settings.Enabled) return false;
var series = await _unitOfWork.SeriesRepository.GetSeriesByIdAsync(seriesId, SeriesIncludes.Metadata | SeriesIncludes.Related);
if (series == null) return false;
var defaultAdmin = await _unitOfWork.UserRepository.GetDefaultAdminUser();
_logger.LogInformation("Writing External metadata to Series {SeriesName}", series.Name);
var madeModification = false;
if (!series.Metadata.SummaryLocked && string.IsNullOrEmpty(series.Metadata.Summary) && settings.EnableSummary)
{
series.Metadata.Summary = CleanSummary(externalMetadata.Summary);
madeModification = true;
}
if (settings.EnableStartDate && externalMetadata.StartDate.HasValue)
{
series.Metadata.ReleaseYear = externalMetadata.StartDate.Value.Year;
madeModification = true;
}
var processedGenres = new List<string>();
var processedTags = new List<string>();
#region Genres and Tags
// Process Genres
if (externalMetadata.Genres != null)
{
foreach (var genre in externalMetadata.Genres.Where(g => !settings.Blacklist.Contains(g)))
{
// Apply field mappings
var mappedGenre = ApplyFieldMapping(genre, MetadataFieldType.Genre, settings.FieldMappings);
if (mappedGenre != null)
{
processedGenres.Add(mappedGenre);
}
}
// Strip blacklisted items from processedGenres
processedGenres = processedGenres.Distinct().Where(g => !settings.Blacklist.Contains(g)).ToList();
if (settings.EnableGenres && processedGenres.Count > 0)
{
_logger.LogDebug("Found {GenreCount} genres for {SeriesName}", processedGenres.Count, series.Name);
var allGenres = (await _unitOfWork.GenreRepository.GetAllGenresByNamesAsync(processedGenres.Select(Parser.Normalize))).ToList();
series.Metadata.Genres ??= [];
GenreHelper.UpdateGenreList(processedGenres, series, allGenres, genre =>
{
series.Metadata.Genres.Add(genre);
madeModification = true;
}, () => series.Metadata.GenresLocked = true);
}
}
// Process Tags
if (externalMetadata.Tags != null)
{
foreach (var tag in externalMetadata.Tags.Select(t => t.Name))
{
// Apply field mappings
var mappedTag = ApplyFieldMapping(tag, MetadataFieldType.Tag, settings.FieldMappings);
if (mappedTag != null)
{
processedTags.Add(mappedTag);
}
}
// Strip blacklisted items from processedTags
processedTags = processedTags.Distinct()
.Where(g => !settings.Blacklist.Contains(g))
.Where(g => settings.Whitelist.Count == 0 || settings.Whitelist.Contains(g))
.ToList();
// Set the tags for the series and ensure they are in the DB
if (settings.EnableTags && processedTags.Count > 0)
{
_logger.LogDebug("Found {TagCount} tags for {SeriesName}", processedTags.Count, series.Name);
var allTags = (await _unitOfWork.TagRepository.GetAllTagsByNameAsync(processedTags.Select(Parser.Normalize)))
.ToList();
series.Metadata.Tags ??= [];
TagHelper.UpdateTagList(processedTags, series, allTags, tag =>
{
series.Metadata.Tags.Add(tag);
madeModification = true;
}, () => series.Metadata.TagsLocked = true);
}
}
#endregion
#region Age Rating
// Determine Age Rating
var ageRating = DetermineAgeRating(processedGenres.Concat(processedTags), settings.AgeRatingMappings);
if (!series.Metadata.AgeRatingLocked && series.Metadata.AgeRating <= ageRating)
{
series.Metadata.AgeRating = ageRating;
_unitOfWork.SeriesRepository.Update(series);
madeModification = true;
}
#endregion
#region People
if (settings.EnablePeople)
{
series.Metadata.People ??= new List<SeriesMetadataPeople>();
// Ensure all people are named correctly
externalMetadata.Staff = externalMetadata.Staff.Select(s =>
{
if (settings.FirstLastPeopleNaming)
{
s.Name = s.FirstName + " " + s.LastName;
}
else
{
s.Name = s.LastName + " " + s.FirstName;
}
return s;
}).ToList();
// Roles: Character Design, Story, Art
var allWriters = externalMetadata.Staff
.Where(s => s.Role is "Story" or "Story & Art")
.ToList();
var writers = allWriters
.Select(w => new PersonDto()
{
Name = w.Name,
AniListId = ScrobblingService.ExtractId<int>(w.Url, ScrobblingService.AniListStaffWebsite),
Description = CleanSummary(w.Description),
}).ToList();
// NOTE: PersonRoles can be a hashset
if (!series.Metadata.WriterLocked && writers.Count > 0 && settings.PersonRoles.Contains(PersonRole.Writer))
{
await SeriesService.HandlePeopleUpdateAsync(series.Metadata, writers, PersonRole.Writer, _unitOfWork);
_unitOfWork.SeriesRepository.Update(series);
await _unitOfWork.CommitAsync();
await DownloadAndSetCovers(allWriters);
madeModification = true;
}
var allArtists = externalMetadata.Staff
.Where(s => s.Role is "Art" or "Story & Art")
.ToList();
var artists = allArtists
.Select(w => new PersonDto()
{
Name = w.Name,
AniListId = ScrobblingService.ExtractId<int>(w.Url, ScrobblingService.AniListStaffWebsite),
Description = CleanSummary(w.Description),
}).ToList();
if (!series.Metadata.CoverArtistLocked && artists.Count > 0 && settings.PersonRoles.Contains(PersonRole.CoverArtist))
{
await SeriesService.HandlePeopleUpdateAsync(series.Metadata, artists, PersonRole.CoverArtist, _unitOfWork);
// Download the image and save it
_unitOfWork.SeriesRepository.Update(series);
await _unitOfWork.CommitAsync();
await DownloadAndSetCovers(allArtists);
madeModification = true;
}
if (externalMetadata.Characters != null && settings.PersonRoles.Contains(PersonRole.Character))
{
var characters = externalMetadata.Characters
.Select(w => new PersonDto()
{
Name = w.Name,
AniListId = ScrobblingService.ExtractId<int>(w.Url, ScrobblingService.AniListCharacterWebsite),
Description = CleanSummary(w.Description),
}).ToList();
if (!series.Metadata.CharacterLocked && characters.Count > 0)
{
await SeriesService.HandlePeopleUpdateAsync(series.Metadata, characters, PersonRole.Character, _unitOfWork);
// Download the image and save it
_unitOfWork.SeriesRepository.Update(series);
await _unitOfWork.CommitAsync();
foreach (var character in externalMetadata.Characters)
{
var aniListId = ScrobblingService.ExtractId<int>(character.Url, ScrobblingService.AniListCharacterWebsite);
if (aniListId <= 0) continue;
var person = await _unitOfWork.PersonRepository.GetPersonByAniListId(aniListId);
if (person != null && !string.IsNullOrEmpty(character.ImageUrl) && string.IsNullOrEmpty(person.CoverImage))
{
await _coverDbService.SetPersonCoverImage(person, character.ImageUrl, false);
}
}
madeModification = true;
}
}
}
#endregion
if (!series.Metadata.PublicationStatusLocked && settings.EnablePublicationStatus)
{
var chapters = (await _unitOfWork.SeriesRepository.GetSeriesByIdAsync(series.Id, SeriesIncludes.Chapters))!.Volumes.SelectMany(v => v.Chapters).ToList();
var wasChanged = DeterminePublicationStatus(series, chapters, externalMetadata);
_unitOfWork.SeriesRepository.Update(series);
madeModification = madeModification || wasChanged;
}
if (settings.EnableRelationships && externalMetadata.Relations != null && defaultAdmin != null)
{
foreach (var relation in externalMetadata.Relations)
{
var relatedSeries = await _unitOfWork.SeriesRepository.GetSeriesByAnyName(
relation.SeriesName.NativeTitle,
relation.SeriesName.PreferredTitle,
relation.PlusMediaFormat.GetMangaFormats(),
defaultAdmin.Id,
relation.AniListId,
SeriesIncludes.Related);
// Skip if no related series found or series is the parent
if (relatedSeries == null || relatedSeries.Id == series.Id || relation.Relation == RelationKind.Parent) continue;
// Check if the relationship already exists
var relationshipExists = series.Relations.Any(r =>
r.TargetSeriesId == relatedSeries.Id && r.RelationKind == relation.Relation);
if (relationshipExists) continue;
series.Relations.Add(new SeriesRelation
{
RelationKind = relation.Relation,
TargetSeries = relatedSeries,
TargetSeriesId = relatedSeries.Id,
Series = series,
SeriesId = series.Id
});
// Handle sequel/prequel: add reverse relationship
if (relation.Relation is RelationKind.Prequel or RelationKind.Sequel)
{
var reverseExists = relatedSeries.Relations.Any(r =>
r.TargetSeriesId == series.Id && r.RelationKind == GetReverseRelation(relation.Relation));
if (reverseExists) continue;
relatedSeries.Relations.Add(new SeriesRelation
{
RelationKind = GetReverseRelation(relation.Relation),
TargetSeries = series,
TargetSeriesId = series.Id,
Series = relatedSeries,
SeriesId = relatedSeries.Id
});
}
madeModification = true;
}
}
return madeModification;
}
private static RelationKind GetReverseRelation(RelationKind relation)
{
return relation switch
{
RelationKind.Prequel => RelationKind.Sequel,
RelationKind.Sequel => RelationKind.Prequel,
_ => relation // For other relationships, no reverse needed
};
}
private async Task DownloadAndSetCovers(List<SeriesStaffDto> people)
{
foreach (var staff in people)
{
var aniListId = ScrobblingService.ExtractId<int?>(staff.Url, ScrobblingService.AniListStaffWebsite);
if (aniListId is null or <= 0) continue;
var person = await _unitOfWork.PersonRepository.GetPersonByAniListId(aniListId.Value);
if (person != null && !string.IsNullOrEmpty(staff.ImageUrl) && string.IsNullOrEmpty(person.CoverImage))
{
await _coverDbService.SetPersonCoverImage(person, staff.ImageUrl, false);
}
}
}
private bool DeterminePublicationStatus(Series series, List<Chapter> chapters, ExternalSeriesDetailDto externalMetadata)
{
var madeModification = false;
try
{
// Determine the expected total count based on local metadata
series.Metadata.TotalCount = Math.Max(
chapters.Max(chapter => chapter.TotalCount),
externalMetadata.Volumes > 0 ? externalMetadata.Volumes : externalMetadata.Chapters
);
// The actual number of count's defined across all chapter's metadata
series.Metadata.MaxCount = chapters.Max(chapter => chapter.Count);
var nonSpecialVolumes = series.Volumes
.Where(v => v.MaxNumber.IsNot(Parser.SpecialVolumeNumber))
.ToList();
var maxVolume = (int)(nonSpecialVolumes.Count != 0 ? nonSpecialVolumes.Max(v => v.MaxNumber) : 0);
var maxChapter = (int)chapters.Max(c => c.MaxNumber);
if (series.Format == MangaFormat.Epub || series.Format == MangaFormat.Pdf && chapters.Count == 1)
{
series.Metadata.MaxCount = 1;
}
else if (series.Metadata.TotalCount <= 1 && chapters.Count == 1 && chapters[0].IsSpecial)
{
series.Metadata.MaxCount = series.Metadata.TotalCount;
}
else if ((maxChapter == Parser.DefaultChapterNumber || maxChapter > series.Metadata.TotalCount) &&
maxVolume <= series.Metadata.TotalCount)
{
series.Metadata.MaxCount = maxVolume;
}
else if (maxVolume == series.Metadata.TotalCount)
{
series.Metadata.MaxCount = maxVolume;
}
else
{
series.Metadata.MaxCount = maxChapter;
}
var status = PublicationStatus.OnGoing;
var hasExternalCounts = externalMetadata.Volumes > 0 || externalMetadata.Chapters > 0;
if (hasExternalCounts)
{
status = PublicationStatus.Ended;
// Check if all volumes/chapters match the total count
if (series.Metadata.MaxCount == series.Metadata.TotalCount && series.Metadata.TotalCount > 0)
{
status = PublicationStatus.Completed;
}
madeModification = true;
}
series.Metadata.PublicationStatus = status;
}
catch (Exception ex)
{
_logger.LogCritical(ex, "There was an issue determining Publication Status");
series.Metadata.PublicationStatus = PublicationStatus.OnGoing;
}
return madeModification;
}
private static string? ApplyFieldMapping(string value, MetadataFieldType sourceType, List<MetadataFieldMappingDto> mappings)
{
// Find matching mapping
var mapping = mappings
.FirstOrDefault(m =>
m.SourceType == sourceType &&
m.SourceValue.Equals(value, StringComparison.OrdinalIgnoreCase));
if (mapping == null) return value;
// If mapping exists, return destination or source value
return mapping.DestinationValue ?? (mapping.ExcludeFromSource ? null : value);
}
private static AgeRating DetermineAgeRating(IEnumerable<string> values, Dictionary<string, AgeRating> mappings)
{
// Find highest age rating from mappings
return values
.Select(v => mappings.TryGetValue(v, out var mapping) ? mapping : AgeRating.Unknown)
.DefaultIfEmpty(AgeRating.Unknown)
.Max();
}
/// <summary>
/// Gets from DB or creates a new one with just SeriesId