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- using MediaBrowser.Common.Extensions;
- using System;
- using System.Collections.Concurrent;
- using System.Collections.Generic;
- using System.IO;
- using System.Linq;
- using System.Runtime.Serialization;
- using System.Threading;
- using System.Threading.Tasks;
- namespace MediaBrowser.Controller.Entities
- {
- /// <summary>
- /// Specialized Folder class that points to a subset of the physical folders in the system.
- /// It is created from the user-specific folders within the system root
- /// </summary>
- public class CollectionFolder : Folder, ICollectionFolder
- {
- /// <summary>
- /// Gets a value indicating whether this instance is virtual folder.
- /// </summary>
- /// <value><c>true</c> if this instance is virtual folder; otherwise, <c>false</c>.</value>
- [IgnoreDataMember]
- public override bool IsVirtualFolder
- {
- get
- {
- return true;
- }
- }
- /// <summary>
- /// Allow different display preferences for each collection folder
- /// </summary>
- /// <value>The display prefs id.</value>
- protected override Guid DisplayPreferencesId
- {
- get
- {
- return Id;
- }
- }
- // Cache this since it will be used a lot
- /// <summary>
- /// The null task result
- /// </summary>
- private static readonly Task NullTaskResult = Task.FromResult<object>(null);
- /// <summary>
- /// Compare our current children (presumably just read from the repo) with the current state of the file system and adjust for any changes
- /// ***Currently does not contain logic to maintain items that are unavailable in the file system***
- /// </summary>
- /// <param name="progress">The progress.</param>
- /// <param name="cancellationToken">The cancellation token.</param>
- /// <param name="recursive">if set to <c>true</c> [recursive].</param>
- /// <param name="forceRefreshMetadata">if set to <c>true</c> [force refresh metadata].</param>
- /// <returns>Task.</returns>
- protected override Task ValidateChildrenInternal(IProgress<double> progress, CancellationToken cancellationToken, bool? recursive = null, bool forceRefreshMetadata = false)
- {
- //we don't directly validate our children
- //but we do need to clear out the index cache...
- IndexCache = new ConcurrentDictionary<string, List<BaseItem>>(StringComparer.OrdinalIgnoreCase);
- return NullTaskResult;
- }
- /// <summary>
- /// Our children are actually just references to the ones in the physical root...
- /// </summary>
- /// <value>The actual children.</value>
- protected override ConcurrentDictionary<Guid,BaseItem> ActualChildren
- {
- get
- {
- var ourChildren =
- LibraryManager.RootFolder.RecursiveChildren
- .Where(i => i is Folder && i.Path != null && ResolveArgs.PhysicalLocations.Contains(i.Path, StringComparer.OrdinalIgnoreCase))
- .Cast<Folder>().SelectMany(c => c.Children);
- return new ConcurrentDictionary<Guid,BaseItem>(ourChildren.ToDictionary(i => i.Id));
- }
- }
- }
- }
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