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using MediaBrowser.Common.Extensions;
using MediaBrowser.Model.Entities;
using MoreLinq;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Controller.Entities
{
/// <summary>
/// Class IndexFolder
/// </summary>
public class IndexFolder : Folder
{
/// <summary>
/// Initializes a new instance of the <see cref="IndexFolder" /> class.
/// </summary>
/// <param name="parent">The parent.</param>
/// <param name="shadow">The shadow.</param>
/// <param name="children">The children.</param>
/// <param name="indexName">Name of the index.</param>
/// <param name="groupContents">if set to <c>true</c> [group contents].</param>
public IndexFolder(Folder parent, BaseItem shadow, IEnumerable<BaseItem> children, string indexName, bool groupContents = true)
{
ChildSource = children;
ShadowItem = shadow;
GroupContents = groupContents;
if (shadow == null)
{
Name = ForcedSortName = "<Unknown>";
}
else
{
SetShadowValues();
}
Id = (parent.Id.ToString() + Name).GetMBId(typeof(IndexFolder));
IndexName = indexName;
Parent = parent;
}
/// <summary>
/// Resets the parent.
/// </summary>
/// <param name="parent">The parent.</param>
public void ResetParent(Folder parent)
{
Parent = parent;
Id = (parent.Id.ToString() + Name).GetMBId(typeof(IndexFolder));
}
/// <summary>
/// Override this to true if class should be grouped under a container in indicies
/// The container class should be defined via IndexContainer
/// </summary>
/// <value><c>true</c> if [group in index]; otherwise, <c>false</c>.</value>
[IgnoreDataMember]
public override bool GroupInIndex
{
get
{
return ShadowItem != null && ShadowItem.GroupInIndex;
}
}
public override LocationType LocationType
{
get
{
return LocationType.Virtual;
}
}
/// <summary>
/// Override this to return the folder that should be used to construct a container
/// for this item in an index. GroupInIndex should be true as well.
/// </summary>
/// <value>The index container.</value>
[IgnoreDataMember]
public override Folder IndexContainer
{
get { return ShadowItem != null ? ShadowItem.IndexContainer : new IndexFolder(this, null, null, "<Unknown>", false); }
}
/// <summary>
/// Gets or sets a value indicating whether [group contents].
/// </summary>
/// <value><c>true</c> if [group contents]; otherwise, <c>false</c>.</value>
protected bool GroupContents { get; set; }
/// <summary>
/// Gets or sets the child source.
/// </summary>
/// <value>The child source.</value>
protected IEnumerable<BaseItem> ChildSource { get; set; }
/// <summary>
/// Gets or sets our children.
/// </summary>
/// <value>Our children.</value>
protected ConcurrentBag<BaseItem> OurChildren { get; set; }
/// <summary>
/// Gets the name of the index.
/// </summary>
/// <value>The name of the index.</value>
public string IndexName { get; private set; }
/// <summary>
/// Override to return the children defined to us when we were created
/// </summary>
/// <value>The actual children.</value>
protected override ConcurrentDictionary<Guid,BaseItem> LoadChildren()
{
var originalChildSource = ChildSource.ToList();
var kids = originalChildSource;
if (GroupContents)
{
// Recursively group up the chain
var group = true;
var isSubsequentLoop = false;
while (group)
{
kids = isSubsequentLoop || kids.Any(i => i.GroupInIndex)
? GroupedSource(kids).ToList()
: originalChildSource;
group = kids.Any(i => i.GroupInIndex);
isSubsequentLoop = true;
}
}
// Now - since we built the index grouping from the bottom up - we now need to properly set Parents from the top down
SetParents(this, kids.OfType<IndexFolder>());
return new ConcurrentDictionary<Guid, BaseItem>(kids.DistinctBy(i => i.Id).ToDictionary(i => i.Id));
}
/// <summary>
/// Sets the parents.
/// </summary>
/// <param name="parent">The parent.</param>
/// <param name="kids">The kids.</param>
private void SetParents(Folder parent, IEnumerable<IndexFolder> kids)
{
foreach (var child in kids)
{
child.ResetParent(parent);
child.SetParents(child, child.Children.OfType<IndexFolder>());
}
}
/// <summary>
/// Groupeds the source.
/// </summary>
/// <param name="source">The source.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
protected IEnumerable<BaseItem> GroupedSource(IEnumerable<BaseItem> source)
{
return source.GroupBy(i => i.IndexContainer).Select(container => new IndexFolder(this, container.Key, container, null, false));
}
/// <summary>
/// The item we are shadowing as a folder (Genre, Actor, etc.)
/// We inherit the images and other meta from this item
/// </summary>
/// <value>The shadow item.</value>
protected BaseItem ShadowItem { get; set; }
/// <summary>
/// Sets the shadow values.
/// </summary>
protected void SetShadowValues()
{
if (ShadowItem != null)
{
Name = ShadowItem.Name;
ForcedSortName = ShadowItem.SortName;
Genres = ShadowItem.Genres;
Studios = ShadowItem.Studios;
OfficialRating = ShadowItem.OfficialRating;
BackdropImagePaths = ShadowItem.BackdropImagePaths;
Images = ShadowItem.Images;
Overview = ShadowItem.Overview;
DisplayMediaType = ShadowItem.GetType().Name;
}
}
/// <summary>
/// Overrides the base implementation to refresh metadata for local trailers
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="forceSave">if set to <c>true</c> [is new item].</param>
/// <param name="forceRefresh">if set to <c>true</c> [force].</param>
/// <param name="allowSlowProviders">if set to <c>true</c> [allow slow providers].</param>
/// <param name="resetResolveArgs">if set to <c>true</c> [reset resolve args].</param>
/// <returns>Task{System.Boolean}.</returns>
public override Task<bool> RefreshMetadata(CancellationToken cancellationToken, bool forceSave = false, bool forceRefresh = false, bool allowSlowProviders = true, bool resetResolveArgs = true)
{
// We should never get in here since these are not part of the library
return Task.FromResult(false);
}
}
}
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