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#pragma warning disable RS0030 // Do not use banned APIs
using System;
using System.Collections.Generic;
using System.Linq;
using Jellyfin.Data.Enums;
using Jellyfin.Database.Implementations;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.Persistence;
using Microsoft.EntityFrameworkCore;
using DbLinkedChildType = Jellyfin.Database.Implementations.Entities.LinkedChildType;
using LinkedChildType = MediaBrowser.Controller.Entities.LinkedChildType;
namespace Jellyfin.Server.Implementations.Item;
/// <summary>
/// Provides linked children query and manipulation operations.
/// </summary>
public class LinkedChildrenService : ILinkedChildrenService
{
private readonly IDbContextFactory<JellyfinDbContext> _dbProvider;
private readonly IItemTypeLookup _itemTypeLookup;
private readonly IItemQueryHelpers _queryHelpers;
/// <summary>
/// Initializes a new instance of the <see cref="LinkedChildrenService"/> class.
/// </summary>
/// <param name="dbProvider">The database context factory.</param>
/// <param name="itemTypeLookup">The item type lookup.</param>
/// <param name="queryHelpers">The shared query helpers.</param>
public LinkedChildrenService(
IDbContextFactory<JellyfinDbContext> dbProvider,
IItemTypeLookup itemTypeLookup,
IItemQueryHelpers queryHelpers)
{
_dbProvider = dbProvider;
_itemTypeLookup = itemTypeLookup;
_queryHelpers = queryHelpers;
}
/// <inheritdoc/>
public IReadOnlyList<Guid> GetLinkedChildrenIds(Guid parentId, int? childType = null)
{
using var dbContext = _dbProvider.CreateDbContext();
var query = dbContext.LinkedChildren
.Where(lc => lc.ParentId.Equals(parentId));
if (childType.HasValue)
{
query = query.Where(lc => (int)lc.ChildType == childType.Value);
}
return query
.OrderBy(lc => lc.SortOrder)
.Select(lc => lc.ChildId)
.ToArray();
}
/// <inheritdoc/>
public IReadOnlyDictionary<string, MusicArtist[]> FindArtists(IReadOnlyList<string> artistNames)
{
using var dbContext = _dbProvider.CreateDbContext();
var artists = dbContext.BaseItems
.AsNoTracking()
.Where(e => e.Type == _itemTypeLookup.BaseItemKindNames[BaseItemKind.MusicArtist]!)
.Where(e => artistNames.Contains(e.Name))
.ToArray();
var lookup = artists
.GroupBy(e => e.Name!)
.ToDictionary(
g => g.Key,
g => g.Select(f => _queryHelpers.DeserializeBaseItem(f)).Where(dto => dto is not null).Cast<MusicArtist>().ToArray());
var result = new Dictionary<string, MusicArtist[]>(artistNames.Count);
foreach (var name in artistNames)
{
if (lookup.TryGetValue(name, out var artistArray))
{
result[name] = artistArray;
}
}
return result;
}
/// <inheritdoc/>
public IReadOnlyList<Guid> GetManualLinkedParentIds(Guid childId)
{
using var context = _dbProvider.CreateDbContext();
return context.LinkedChildren
.Where(lc => lc.ChildId == childId && lc.ChildType == DbLinkedChildType.Manual)
.Select(lc => lc.ParentId)
.Distinct()
.ToList();
}
/// <inheritdoc/>
public IReadOnlyList<Guid> RerouteLinkedChildren(Guid fromChildId, Guid toChildId)
{
using var context = _dbProvider.CreateDbContext();
var affectedParentIds = context.LinkedChildren
.Where(lc => lc.ChildId == fromChildId && lc.ChildType == DbLinkedChildType.Manual)
.Select(lc => lc.ParentId)
.Distinct()
.ToList();
if (affectedParentIds.Count == 0)
{
return affectedParentIds;
}
var parentsWithTarget = context.LinkedChildren
.Where(lc => lc.ChildId == toChildId && lc.ChildType == DbLinkedChildType.Manual)
.Select(lc => lc.ParentId)
.ToHashSet();
context.LinkedChildren
.Where(lc => lc.ChildId == fromChildId
&& lc.ChildType == DbLinkedChildType.Manual
&& !parentsWithTarget.Contains(lc.ParentId))
.ExecuteUpdate(s => s.SetProperty(e => e.ChildId, toChildId));
context.LinkedChildren
.Where(lc => lc.ChildId == fromChildId
&& lc.ChildType == DbLinkedChildType.Manual
&& parentsWithTarget.Contains(lc.ParentId))
.ExecuteDelete();
return affectedParentIds;
}
/// <inheritdoc/>
public void UpsertLinkedChild(Guid parentId, Guid childId, LinkedChildType childType)
{
using var context = _dbProvider.CreateDbContext();
var dbChildType = (DbLinkedChildType)childType;
var existingLink = context.LinkedChildren
.FirstOrDefault(lc => lc.ParentId == parentId && lc.ChildId == childId);
if (existingLink is null)
{
context.LinkedChildren.Add(new Jellyfin.Database.Implementations.Entities.LinkedChildEntity
{
ParentId = parentId,
ChildId = childId,
ChildType = dbChildType,
SortOrder = null
});
}
else
{
existingLink.ChildType = dbChildType;
}
context.SaveChanges();
}
}
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