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using System;
using System.Buffers;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Jellyfin.Database.Implementations;
using MediaBrowser.Controller.Library;
using MediaBrowser.Model.Globalization;
using MediaBrowser.Model.Tasks;
using Microsoft.EntityFrameworkCore;
namespace Emby.Server.Implementations.ScheduledTasks.Tasks;
/// <summary>
/// Class PeopleValidationTask.
/// </summary>
public class PeopleValidationTask : IScheduledTask, IConfigurableScheduledTask
{
private readonly ILibraryManager _libraryManager;
private readonly ILocalizationManager _localization;
private readonly IDbContextFactory<JellyfinDbContext> _dbContextFactory;
/// <summary>
/// Initializes a new instance of the <see cref="PeopleValidationTask" /> class.
/// </summary>
/// <param name="libraryManager">Instance of the <see cref="ILibraryManager"/> interface.</param>
/// <param name="localization">Instance of the <see cref="ILocalizationManager"/> interface.</param>
/// <param name="dbContextFactory">Instance of the <see cref="IDbContextFactory{TContext}"/> interface.</param>
public PeopleValidationTask(ILibraryManager libraryManager, ILocalizationManager localization, IDbContextFactory<JellyfinDbContext> dbContextFactory)
{
_libraryManager = libraryManager;
_localization = localization;
_dbContextFactory = dbContextFactory;
}
/// <inheritdoc />
public string Name => _localization.GetLocalizedString("TaskRefreshPeople");
/// <inheritdoc />
public string Description => _localization.GetLocalizedString("TaskRefreshPeopleDescription");
/// <inheritdoc />
public string Category => _localization.GetLocalizedString("TasksLibraryCategory");
/// <inheritdoc />
public string Key => "RefreshPeople";
/// <inheritdoc />
public bool IsHidden => false;
/// <inheritdoc />
public bool IsEnabled => true;
/// <inheritdoc />
public bool IsLogged => true;
/// <summary>
/// Creates the triggers that define when the task will run.
/// </summary>
/// <returns>An <see cref="IEnumerable{TaskTriggerInfo}"/> containing the default trigger infos for this task.</returns>
public IEnumerable<TaskTriggerInfo> GetDefaultTriggers()
{
yield return new TaskTriggerInfo
{
Type = TaskTriggerInfoType.IntervalTrigger,
IntervalTicks = TimeSpan.FromDays(7).Ticks
};
}
/// <inheritdoc />
public async Task ExecuteAsync(IProgress<double> progress, CancellationToken cancellationToken)
{
IProgress<double> subProgress = new Progress<double>((val) => progress.Report(val / 2));
await _libraryManager.ValidatePeopleAsync(subProgress, cancellationToken).ConfigureAwait(false);
subProgress = new Progress<double>((val) => progress.Report((val / 2) + 50));
var context = await _dbContextFactory.CreateDbContextAsync(cancellationToken).ConfigureAwait(false);
await using (context.ConfigureAwait(false))
{
var dupQuery = context.Peoples
.GroupBy(e => new { e.Name, e.PersonType })
.Where(e => e.Count() > 1)
.Select(e => e.Select(f => f.Id).ToArray());
var total = dupQuery.Count();
const int PartitionSize = 100;
var iterator = 0;
int itemCounter;
var buffer = ArrayPool<Guid[]>.Shared.Rent(PartitionSize)!;
try
{
do
{
itemCounter = 0;
await foreach (var item in dupQuery
.Take(PartitionSize)
.AsAsyncEnumerable()
.WithCancellation(cancellationToken)
.ConfigureAwait(false))
{
buffer[itemCounter++] = item;
}
for (int i = 0; i < itemCounter; i++)
{
var item = buffer[i];
var reference = item[0];
var dups = item[1..];
await context.PeopleBaseItemMap.WhereOneOrMany(dups, e => e.PeopleId)
.ExecuteUpdateAsync(e => e.SetProperty(f => f.PeopleId, reference), cancellationToken)
.ConfigureAwait(false);
await context.Peoples.Where(e => dups.Contains(e.Id)).ExecuteDeleteAsync(cancellationToken).ConfigureAwait(false);
subProgress.Report(100f / total * ((iterator * PartitionSize) + i));
}
iterator++;
} while (itemCounter == PartitionSize && !cancellationToken.IsCancellationRequested);
}
finally
{
ArrayPool<Guid[]>.Shared.Return(buffer);
}
subProgress.Report(100);
}
}
}
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