jellyfin/MediaBrowser.Controller/Entities/PhotoAlbum.cs

using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Configuration;
using MediaBrowser.Model.Users;
using System;
using System.Linq;
using System.Runtime.Serialization;
using System.Threading;
using System.Threading.Tasks;

namespace MediaBrowser.Controller.Entities
{
    public class PhotoAlbum : Folder, IMetadataContainer
    {
        [IgnoreDataMember]
        public override bool SupportsLocalMetadata
        {
            get
            {
                return false;
            }
        }

        [IgnoreDataMember]
        public override bool AlwaysScanInternalMetadataPath
        {
            get
            {
                return true;
            }
        }

        protected override bool GetBlockUnratedValue(UserPolicy config)
        {
            return config.BlockUnratedItems.Contains(UnratedItem.Other);
        }

        public async Task RefreshAllMetadata(MetadataRefreshOptions refreshOptions, IProgress<double> progress, CancellationToken cancellationToken)
        {
            var items = GetRecursiveChildren().ToList();

            var totalItems = items.Count;
            var numComplete = 0;

            // Refresh songs
            foreach (var item in items)
            {
                cancellationToken.ThrowIfCancellationRequested();

                await item.RefreshMetadata(refreshOptions, cancellationToken).ConfigureAwait(false);

                numComplete++;
                double percent = numComplete;
                percent /= totalItems;
                progress.Report(percent * 100);
            }

            // Refresh current item
            await RefreshMetadata(refreshOptions, cancellationToken).ConfigureAwait(false);

            progress.Report(100);
        }
    }
}