Add Collection Validator, create collection based on nfo

Based on nfo's set element, automatically add movie to collection.

Signed-off-by: Petrus.Z <silencly07@gmail.com>

Emby.Server.Implementations/Library/Validators/CollectionPostScanTask.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Collections;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Persistence;
+using Microsoft.Extensions.Logging;
+
+namespace Emby.Server.Implementations.Library.Validators
+{
+    /// <summary>
+    /// Class CollectionPostScanTask.
+    /// </summary>
+    public class CollectionPostScanTask : ILibraryPostScanTask
+    {
+        /// <summary>
+        /// The _library manager.
+        /// </summary>
+        private readonly ILibraryManager _libraryManager;
+        private readonly ICollectionManager _collectionManager;
+        private readonly ILogger<CollectionValidator> _logger;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CollectionPostScanTask" /> class.
+        /// </summary>
+        /// <param name="libraryManager">The library manager.</param>
+        /// <param name="collectionManager">The collection manager.</param>
+        /// <param name="logger">The logger.</param>
+        public CollectionPostScanTask(
+            ILibraryManager libraryManager,
+            ILogger<CollectionValidator> logger,
+            ICollectionManager collectionManager)
+        {
+            _libraryManager = libraryManager;
+            _collectionManager = collectionManager;
+            _logger = logger;
+        }
+
+        /// <summary>
+        /// Runs the specified progress.
+        /// </summary>
+        /// <param name="progress">The progress.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        public Task Run(IProgress<double> progress, CancellationToken cancellationToken)
+        {
+            return new CollectionValidator(_libraryManager, _collectionManager, _logger).Run(progress, cancellationToken);
+        }
+    }
+}

Emby.Server.Implementations/Library/Validators/CollectionValidator.cs

@@ -0,0 +1,166 @@
+using System;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Collections.Generic;
+using MediaBrowser.Controller.Collections;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Movies;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.Querying;
+using Microsoft.Extensions.Logging;
+using Jellyfin.Data.Enums;
+
+namespace Emby.Server.Implementations.Library.Validators
+{
+    /// <summary>
+    /// Class CollectionValidator.
+    /// </summary>
+    public class CollectionValidator
+    {
+        /// <summary>
+        /// The library manager.
+        /// </summary>
+        private readonly ILibraryManager _libraryManager;
+
+        /// <summary>
+        /// The collection manager.
+        /// </summary>
+        private readonly ICollectionManager _collectionManager;
+
+        /// <summary>
+        /// The logger.
+        /// </summary>
+        private readonly ILogger<CollectionValidator> _logger;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CollectionValidator" /> class.
+        /// </summary>
+        /// <param name="libraryManager">The library manager.</param>
+        /// <param name="collectionManager">The collection manager.</param>
+        /// <param name="logger">The logger.</param>
+        public CollectionValidator(ILibraryManager libraryManager, ICollectionManager collectionManager, ILogger<CollectionValidator> logger)
+        {
+            _libraryManager = libraryManager;
+            _collectionManager = collectionManager;
+            _logger = logger;
+        }
+
+        /// <summary>
+        /// Runs the specified progress.
+        /// </summary>
+        /// <param name="progress">The progress.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        public async Task Run(IProgress<double> progress, CancellationToken cancellationToken)
+        {
+            var movies = _libraryManager.GetItemList(new InternalItemsQuery
+            {
+                IncludeItemTypes = new[] { nameof(Movie) },
+                IsVirtualItem = false,
+                OrderBy = new List<ValueTuple<string, SortOrder>>
+                {
+                new ValueTuple<string, SortOrder>(ItemSortBy.SortName, SortOrder.Ascending)
+                },
+                Recursive = true
+            }).Select(m => m as Movie).ToList();
+
+            var boxSets = _libraryManager.GetItemList(new InternalItemsQuery
+            {
+                IncludeItemTypes = new[] { nameof(BoxSet) },
+                CollapseBoxSetItems = false,
+                Recursive = true
+            }).Select(b => b as BoxSet).ToList();
+
+            var numComplete = 0;
+            var count = movies.Count;
+
+            var map = new Dictionary<string, List<Movie>>();
+            foreach (var movie in movies)
+            {
+                if (movie != null && movie.CollectionName != null)
+                {
+                    var movieList = new List<Movie>();
+                    if (map.TryGetValue(movie.CollectionName, out movieList))
+                    {
+                        if (!movieList.Where(m => m.Id == movie.Id).Any())
+                        {
+                            movieList.Add(movie);
+                            map[movie.CollectionName] = movieList;
+                        }
+                    }
+                    else
+                    {
+                        map[movie.CollectionName] = new List<Movie> { movie };
+                    }
+
+                }
+
+                numComplete++;
+                double percent = numComplete;
+                percent /= count * 2;
+                percent *= 100;
+
+                progress.Report(percent);
+            }
+
+            foreach (var pair in map)
+            {
+                try
+                {
+                    var collectionName = pair.Key;
+                    var movieList = pair.Value;
+
+                    var boxSet = boxSets.FirstOrDefault(b => b != null ? b.Name == collectionName : false);
+                    if (boxSet == null)
+                    {
+                        // won't automatically create collection if only one movie in it
+                        if (movieList.Count >= 2)
+                        {
+                            boxSet = await _collectionManager.CreateCollectionAsync(new CollectionCreationOptions
+                            {
+                                Name = collectionName,
+                                IsLocked = true
+                            });
+
+                            AddMovieToCollection(boxSet.Id, boxSet, movieList);
+                        }
+                    }
+                    else
+                    {
+                        AddMovieToCollection(boxSet.Id, boxSet, movieList);
+                    }
+
+                    numComplete++;
+                    double percent = numComplete;
+                    percent /= count * 2;
+                    percent *= 100;
+
+                    progress.Report(percent);
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogError(ex, "Error refreshing {0}, {1}", pair.Key, pair.Value.ToString());
+                }
+            }
+
+            progress.Report(100);
+        }
+
+        private async void AddMovieToCollection(Guid boxSetId, BoxSet boxSet, List<Movie> movieList)
+        {
+
+            var movieIds = new List<Guid>();
+            foreach (var movie in movieList)
+            {
+                if (!boxSet.ContainsLinkedChildByItemId(movie.Id))
+                {
+                    movieIds.Add(movie.Id);
+                }
+            }
+            if (movieIds.Any()) {
+                await _collectionManager.AddToCollectionAsync(boxSetId, movieIds);
+            }
+        }
+    }
+}