jellyfin/MediaBrowser.Controller/Entities/Folder.cs

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using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.Progress;
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using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Localization;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Controller.Resolvers;
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using MediaBrowser.Model.Entities;
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>
/// Class Folder
/// </summary>
public class Folder : BaseItem
{
/// <summary>
/// Gets a value indicating whether this instance is folder.
/// </summary>
/// <value><c>true</c> if this instance is folder; otherwise, <c>false</c>.</value>
[IgnoreDataMember]
public override bool IsFolder
{
get
{
return true;
}
}
/// <summary>
/// Gets or sets a value indicating whether this instance is physical root.
/// </summary>
/// <value><c>true</c> if this instance is physical root; otherwise, <c>false</c>.</value>
public bool IsPhysicalRoot { get; set; }
/// <summary>
/// Gets or sets a value indicating whether this instance is root.
/// </summary>
/// <value><c>true</c> if this instance is root; otherwise, <c>false</c>.</value>
public bool IsRoot { get; set; }
/// <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 virtual bool IsVirtualFolder
{
get
{
return false;
}
}
/// <summary>
/// Return the id that should be used to key display prefs for this item.
/// Default is based on the type for everything except actual generic folders.
/// </summary>
/// <value>The display prefs id.</value>
[IgnoreDataMember]
protected virtual Guid DisplayPreferencesId
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{
get
{
var thisType = GetType();
return thisType == typeof(Folder) ? Id : thisType.FullName.GetMD5();
}
}
/// <summary>
/// Gets the display preferences id.
/// </summary>
/// <param name="userId">The user id.</param>
/// <returns>Guid.</returns>
public Guid GetDisplayPreferencesId(Guid userId)
{
return (userId + DisplayPreferencesId.ToString()).GetMD5();
}
/// <summary>
/// Adds the child.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.InvalidOperationException">Unable to add + item.Name</exception>
public async Task AddChild(BaseItem item, CancellationToken cancellationToken)
{
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item.Parent = this;
if (item.Id == Guid.Empty)
{
item.Id = item.Path.GetMBId(item.GetType());
}
if (item.DateCreated == DateTime.MinValue)
{
item.DateCreated = DateTime.Now;
}
if (item.DateModified == DateTime.MinValue)
{
item.DateModified = DateTime.Now;
}
if (!_children.TryAdd(item.Id, item))
{
throw new InvalidOperationException("Unable to add " + item.Name);
}
var newChildren = Children.ToList();
await LibraryManager.CreateItem(item, cancellationToken).ConfigureAwait(false);
await LibraryManager.SaveChildren(Id, newChildren, cancellationToken).ConfigureAwait(false);
}
/// <summary>
/// Removes the child.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.InvalidOperationException">Unable to remove + item.Name</exception>
public Task RemoveChild(BaseItem item, CancellationToken cancellationToken)
{
BaseItem removed;
if (!_children.TryRemove(item.Id, out removed))
{
throw new InvalidOperationException("Unable to remove " + item.Name);
}
item.Parent = null;
var newChildren = Children.ToList();
LibraryManager.ReportItemRemoved(item);
return LibraryManager.SaveChildren(Id, newChildren, cancellationToken);
}
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#region Indexing
/// <summary>
/// The _index by options
/// </summary>
private Dictionary<string, Func<User, IEnumerable<BaseItem>>> _indexByOptions;
/// <summary>
/// Dictionary of index options - consists of a display value and an indexing function
/// which takes User as a parameter and returns an IEnum of BaseItem
/// </summary>
/// <value>The index by options.</value>
[IgnoreDataMember]
public Dictionary<string, Func<User, IEnumerable<BaseItem>>> IndexByOptions
{
get { return _indexByOptions ?? (_indexByOptions = GetIndexByOptions()); }
}
/// <summary>
/// Returns the valid set of index by options for this folder type.
/// Override or extend to modify.
/// </summary>
/// <returns>Dictionary{System.StringFunc{UserIEnumerable{BaseItem}}}.</returns>
protected virtual Dictionary<string, Func<User, IEnumerable<BaseItem>>> GetIndexByOptions()
{
return new Dictionary<string, Func<User, IEnumerable<BaseItem>>> {
{LocalizedStrings.Instance.GetString("NoneDispPref"), null},
{LocalizedStrings.Instance.GetString("PerformerDispPref"), GetIndexByPerformer},
{LocalizedStrings.Instance.GetString("GenreDispPref"), GetIndexByGenre},
{LocalizedStrings.Instance.GetString("DirectorDispPref"), GetIndexByDirector},
{LocalizedStrings.Instance.GetString("YearDispPref"), GetIndexByYear},
{LocalizedStrings.Instance.GetString("OfficialRatingDispPref"), null},
{LocalizedStrings.Instance.GetString("StudioDispPref"), GetIndexByStudio}
};
}
/// <summary>
/// Gets the index by actor.
/// </summary>
/// <param name="user">The user.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
protected IEnumerable<BaseItem> GetIndexByPerformer(User user)
{
return GetIndexByPerson(user, new List<string> { PersonType.Actor, PersonType.GuestStar }, true, LocalizedStrings.Instance.GetString("PerformerDispPref"));
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}
/// <summary>
/// Gets the index by director.
/// </summary>
/// <param name="user">The user.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
protected IEnumerable<BaseItem> GetIndexByDirector(User user)
{
return GetIndexByPerson(user, new List<string> { PersonType.Director }, false, LocalizedStrings.Instance.GetString("DirectorDispPref"));
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}
/// <summary>
/// Gets the index by person.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="personTypes">The person types we should match on</param>
/// <param name="includeAudio">if set to <c>true</c> [include audio].</param>
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/// <param name="indexName">Name of the index.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
private IEnumerable<BaseItem> GetIndexByPerson(User user, List<string> personTypes, bool includeAudio, string indexName)
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{
// Even though this implementation means multiple iterations over the target list - it allows us to defer
// the retrieval of the individual children for each index value until they are requested.
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using (new Profiler(indexName + " Index Build for " + Name, Logger))
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{
// Put this in a local variable to avoid an implicitly captured closure
var currentIndexName = indexName;
var us = this;
var recursiveChildren = GetRecursiveChildren(user).Where(i => i.IncludeInIndex).ToList();
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// Get the candidates, but handle audio separately
var candidates = recursiveChildren.Where(i => i.AllPeople != null && !(i is Audio.Audio)).ToList();
var indexFolders = candidates.AsParallel().SelectMany(i => i.AllPeople.Where(p => personTypes.Contains(p.Type))
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.Select(a => a.Name))
.Distinct()
.Select(i =>
{
try
{
return LibraryManager.GetPerson(i).Result;
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}
catch (IOException ex)
{
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Logger.ErrorException("Error getting person {0}", ex, i);
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return null;
}
catch (AggregateException ex)
{
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Logger.ErrorException("Error getting person {0}", ex, i);
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return null;
}
})
.Where(i => i != null)
.Select(a => new IndexFolder(us, a,
candidates.Where(i => i.AllPeople.Any(p => personTypes.Contains(p.Type) && p.Name.Equals(a.Name, StringComparison.OrdinalIgnoreCase))
), currentIndexName)).AsEnumerable();
if (includeAudio)
{
var songs = recursiveChildren.OfType<Audio.Audio>().ToList();
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indexFolders = songs.Select(i => i.Artist ?? string.Empty)
.Distinct(StringComparer.OrdinalIgnoreCase)
.Select(i =>
{
try
{
return LibraryManager.GetArtist(i).Result;
}
catch (IOException ex)
{
Logger.ErrorException("Error getting artist {0}", ex, i);
return null;
}
catch (AggregateException ex)
{
Logger.ErrorException("Error getting artist {0}", ex, i);
return null;
}
})
.Where(i => i != null)
.Select(a => new IndexFolder(us, a,
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songs.Where(i => string.Equals(i.Artist, a.Name, StringComparison.OrdinalIgnoreCase)
), currentIndexName)).Concat(indexFolders);
}
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return indexFolders;
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}
}
/// <summary>
/// Gets the index by studio.
/// </summary>
/// <param name="user">The user.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
protected IEnumerable<BaseItem> GetIndexByStudio(User user)
{
// Even though this implementation means multiple iterations over the target list - it allows us to defer
// the retrieval of the individual children for each index value until they are requested.
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using (new Profiler("Studio Index Build for " + Name, Logger))
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{
var indexName = LocalizedStrings.Instance.GetString("StudioDispPref");
var candidates = GetRecursiveChildren(user).Where(i => i.IncludeInIndex && i.Studios != null).ToList();
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return candidates.AsParallel().SelectMany(i => i.Studios)
.Distinct()
.Select(i =>
{
try
{
return LibraryManager.GetStudio(i).Result;
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}
catch (IOException ex)
{
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Logger.ErrorException("Error getting studio {0}", ex, i);
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return null;
}
catch (AggregateException ex)
{
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Logger.ErrorException("Error getting studio {0}", ex, i);
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return null;
}
})
.Where(i => i != null)
.Select(ndx => new IndexFolder(this, ndx, candidates.Where(i => i.Studios.Any(s => s.Equals(ndx.Name, StringComparison.OrdinalIgnoreCase))), indexName));
}
}
/// <summary>
/// Gets the index by genre.
/// </summary>
/// <param name="user">The user.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
protected IEnumerable<BaseItem> GetIndexByGenre(User user)
{
// Even though this implementation means multiple iterations over the target list - it allows us to defer
// the retrieval of the individual children for each index value until they are requested.
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using (new Profiler("Genre Index Build for " + Name, Logger))
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{
var indexName = LocalizedStrings.Instance.GetString("GenreDispPref");
//we need a copy of this so we don't double-recurse
var candidates = GetRecursiveChildren(user).Where(i => i.IncludeInIndex && i.Genres != null).ToList();
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return candidates.AsParallel().SelectMany(i => i.Genres)
.Distinct()
.Select(i =>
{
try
{
return LibraryManager.GetGenre(i).Result;
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}
catch (IOException ex)
{
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Logger.ErrorException("Error getting genre {0}", ex, i);
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return null;
}
catch (AggregateException ex)
{
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Logger.ErrorException("Error getting genre {0}", ex, i);
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return null;
}
})
.Where(i => i != null)
.Select(genre => new IndexFolder(this, genre, candidates.Where(i => i.Genres.Any(g => g.Equals(genre.Name, StringComparison.OrdinalIgnoreCase))), indexName)
);
}
}
/// <summary>
/// Gets the index by year.
/// </summary>
/// <param name="user">The user.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
protected IEnumerable<BaseItem> GetIndexByYear(User user)
{
// Even though this implementation means multiple iterations over the target list - it allows us to defer
// the retrieval of the individual children for each index value until they are requested.
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using (new Profiler("Production Year Index Build for " + Name, Logger))
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{
var indexName = LocalizedStrings.Instance.GetString("YearDispPref");
//we need a copy of this so we don't double-recurse
var candidates = GetRecursiveChildren(user).Where(i => i.IncludeInIndex && i.ProductionYear.HasValue).ToList();
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return candidates.AsParallel().Select(i => i.ProductionYear.Value)
.Distinct()
.Select(i =>
{
try
{
return LibraryManager.GetYear(i).Result;
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}
catch (IOException ex)
{
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Logger.ErrorException("Error getting year {0}", ex, i);
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return null;
}
catch (AggregateException ex)
{
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Logger.ErrorException("Error getting year {0}", ex, i);
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return null;
}
})
.Where(i => i != null)
.Select(ndx => new IndexFolder(this, ndx, candidates.Where(i => i.ProductionYear == int.Parse(ndx.Name)), indexName));
}
}
/// <summary>
/// Returns the indexed children for this user from the cache. Caches them if not already there.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="indexBy">The index by.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
private IEnumerable<BaseItem> GetIndexedChildren(User user, string indexBy)
{
List<BaseItem> result;
var cacheKey = user.Name + indexBy;
IndexCache.TryGetValue(cacheKey, out result);
if (result == null)
{
//not cached - cache it
Func<User, IEnumerable<BaseItem>> indexing;
IndexByOptions.TryGetValue(indexBy, out indexing);
result = BuildIndex(indexBy, indexing, user);
}
return result;
}
/// <summary>
/// Get the list of indexy by choices for this folder (localized).
/// </summary>
/// <value>The index by option strings.</value>
[IgnoreDataMember]
public IEnumerable<string> IndexByOptionStrings
{
get { return IndexByOptions.Keys; }
}
/// <summary>
/// The index cache
/// </summary>
protected ConcurrentDictionary<string, List<BaseItem>> IndexCache = new ConcurrentDictionary<string, List<BaseItem>>(StringComparer.OrdinalIgnoreCase);
/// <summary>
/// Builds the index.
/// </summary>
/// <param name="indexKey">The index key.</param>
/// <param name="indexFunction">The index function.</param>
/// <param name="user">The user.</param>
/// <returns>List{BaseItem}.</returns>
protected virtual List<BaseItem> BuildIndex(string indexKey, Func<User, IEnumerable<BaseItem>> indexFunction, User user)
{
return indexFunction != null
? IndexCache[user.Name + indexKey] = indexFunction(user).ToList()
: null;
}
#endregion
/// <summary>
/// The children
/// </summary>
private ConcurrentDictionary<Guid, BaseItem> _children;
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/// <summary>
/// The _children initialized
/// </summary>
private bool _childrenInitialized;
/// <summary>
/// The _children sync lock
/// </summary>
private object _childrenSyncLock = new object();
/// <summary>
/// Gets or sets the actual children.
/// </summary>
/// <value>The actual children.</value>
protected virtual ConcurrentDictionary<Guid,BaseItem> ActualChildren
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{
get
{
LazyInitializer.EnsureInitialized(ref _children, ref _childrenInitialized, ref _childrenSyncLock, LoadChildren);
return _children;
}
private set
{
_children = value;
if (value == null)
{
_childrenInitialized = false;
}
}
}
/// <summary>
/// thread-safe access to the actual children of this folder - without regard to user
/// </summary>
/// <value>The children.</value>
[IgnoreDataMember]
public IEnumerable<BaseItem> Children
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{
get
{
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return ActualChildren.Values.ToList();
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}
}
/// <summary>
/// thread-safe access to all recursive children of this folder - without regard to user
/// </summary>
/// <value>The recursive children.</value>
[IgnoreDataMember]
public IEnumerable<BaseItem> RecursiveChildren
{
get
{
foreach (var item in Children)
{
yield return item;
if (item.IsFolder)
{
var subFolder = (Folder)item;
foreach (var subitem in subFolder.RecursiveChildren)
{
yield return subitem;
}
}
}
}
}
/// <summary>
/// Loads our children. Validation will occur externally.
/// We want this sychronous.
/// </summary>
/// <returns>ConcurrentBag{BaseItem}.</returns>
protected virtual ConcurrentDictionary<Guid,BaseItem> LoadChildren()
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{
//just load our children from the repo - the library will be validated and maintained in other processes
return new ConcurrentDictionary<Guid,BaseItem>(GetCachedChildren().ToDictionary(i => i.Id));
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}
/// <summary>
/// Gets or sets the current validation cancellation token source.
/// </summary>
/// <value>The current validation cancellation token source.</value>
private CancellationTokenSource CurrentValidationCancellationTokenSource { get; set; }
/// <summary>
/// Validates that the children of the folder still exist
/// </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>
/// <returns>Task.</returns>
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public async Task ValidateChildren(IProgress<double> progress, CancellationToken cancellationToken, bool? recursive = null)
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{
cancellationToken.ThrowIfCancellationRequested();
// Cancel the current validation, if any
if (CurrentValidationCancellationTokenSource != null)
{
CurrentValidationCancellationTokenSource.Cancel();
}
// Create an inner cancellation token. This can cancel all validations from this level on down,
// but nothing above this
var innerCancellationTokenSource = new CancellationTokenSource();
try
{
CurrentValidationCancellationTokenSource = innerCancellationTokenSource;
var linkedCancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(innerCancellationTokenSource.Token, cancellationToken);
await ValidateChildrenInternal(progress, linkedCancellationTokenSource.Token, recursive).ConfigureAwait(false);
}
catch (OperationCanceledException ex)
{
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Logger.Info("ValidateChildren cancelled for " + Name);
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// If the outer cancelletion token in the cause for the cancellation, throw it
if (cancellationToken.IsCancellationRequested && ex.CancellationToken == cancellationToken)
{
throw;
}
}
finally
{
// Null out the token source
if (CurrentValidationCancellationTokenSource == innerCancellationTokenSource)
{
CurrentValidationCancellationTokenSource = null;
}
innerCancellationTokenSource.Dispose();
}
}
/// <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>
/// <returns>Task.</returns>
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protected async virtual Task ValidateChildrenInternal(IProgress<double> progress, CancellationToken cancellationToken, bool? recursive = null)
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{
// Nothing to do here
if (LocationType != LocationType.FileSystem)
{
return;
}
cancellationToken.ThrowIfCancellationRequested();
//get the current valid children from filesystem (or wherever)
var nonCachedChildren = GetNonCachedChildren();
if (nonCachedChildren == null) return; //nothing to validate
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progress.Report(5);
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//build a dictionary of the current children we have now by Id so we can compare quickly and easily
var currentChildren = ActualChildren;
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//create a list for our validated children
var validChildren = new ConcurrentBag<Tuple<BaseItem, bool>>();
var newItems = new ConcurrentBag<BaseItem>();
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cancellationToken.ThrowIfCancellationRequested();
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var options = new ParallelOptions
{
MaxDegreeOfParallelism = 50
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};
Parallel.ForEach(nonCachedChildren, options, child =>
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{
BaseItem currentChild;
if (currentChildren.TryGetValue(child.Id, out currentChild))
{
currentChild.ResolveArgs = child.ResolveArgs;
//existing item - check if it has changed
if (currentChild.HasChanged(child))
{
EntityResolutionHelper.EnsureDates(currentChild, child.ResolveArgs);
validChildren.Add(new Tuple<BaseItem, bool>(currentChild, true));
}
else
{
validChildren.Add(new Tuple<BaseItem, bool>(currentChild, false));
}
}
else
{
//brand new item - needs to be added
newItems.Add(child);
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validChildren.Add(new Tuple<BaseItem, bool>(child, true));
}
});
// If any items were added or removed....
if (!newItems.IsEmpty || currentChildren.Count != validChildren.Count)
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{
var newChildren = validChildren.Select(c => c.Item1).ToList();
//that's all the new and changed ones - now see if there are any that are missing
var itemsRemoved = currentChildren.Values.Except(newChildren).ToList();
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foreach (var item in itemsRemoved)
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{
BaseItem removed;
if (!_children.TryRemove(item.Id, out removed))
{
Logger.Error("Failed to remove {0}", item.Name);
}
else
{
LibraryManager.ReportItemRemoved(item);
}
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}
var saveTasks = new List<Task>();
foreach (var item in newItems)
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{
if (saveTasks.Count > 50)
{
await Task.WhenAll(saveTasks).ConfigureAwait(false);
saveTasks.Clear();
}
if (!_children.TryAdd(item.Id, item))
{
Logger.Error("Failed to add {0}", item.Name);
}
else
{
Logger.Debug("** " + item.Name + " Added to library.");
}
saveTasks.Add(LibraryManager.CreateItem(item, CancellationToken.None));
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}
await Task.WhenAll(saveTasks).ConfigureAwait(false);
await LibraryManager.SaveChildren(Id, newChildren, CancellationToken.None).ConfigureAwait(false);
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//force the indexes to rebuild next time
IndexCache.Clear();
}
progress.Report(10);
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cancellationToken.ThrowIfCancellationRequested();
await RefreshChildren(validChildren, progress, cancellationToken, recursive).ConfigureAwait(false);
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progress.Report(100);
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}
/// <summary>
/// Refreshes the children.
/// </summary>
/// <param name="children">The children.</param>
/// <param name="progress">The progress.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="recursive">if set to <c>true</c> [recursive].</param>
/// <returns>Task.</returns>
private async Task RefreshChildren(IEnumerable<Tuple<BaseItem, bool>> children, IProgress<double> progress, CancellationToken cancellationToken, bool? recursive)
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{
var list = children.ToList();
var percentages = new Dictionary<Guid, double>();
var tasks = new List<Task>();
foreach (var tuple in list)
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{
if (tasks.Count > 8)
{
await Task.WhenAll(tasks).ConfigureAwait(false);
}
Tuple<BaseItem, bool> currentTuple = tuple;
tasks.Add(Task.Run(async () =>
{
cancellationToken.ThrowIfCancellationRequested();
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var child = currentTuple.Item1;
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//refresh it
await child.RefreshMetadata(cancellationToken, resetResolveArgs: child.IsFolder).ConfigureAwait(false);
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// Refresh children if a folder and the item changed or recursive is set to true
var refreshChildren = child.IsFolder && (currentTuple.Item2 || (recursive.HasValue && recursive.Value));
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if (refreshChildren)
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{
// Don't refresh children if explicitly set to false
if (recursive.HasValue && recursive.Value == false)
{
refreshChildren = false;
}
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}
if (refreshChildren)
{
cancellationToken.ThrowIfCancellationRequested();
var innerProgress = new ActionableProgress<double>();
innerProgress.RegisterAction(p =>
{
lock (percentages)
{
percentages[child.Id] = p/100;
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var percent = percentages.Values.Sum();
percent /= list.Count;
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progress.Report((90 * percent) + 10);
}
});
await ((Folder)child).ValidateChildren(innerProgress, cancellationToken, recursive).ConfigureAwait(false);
}
else
{
lock (percentages)
{
percentages[child.Id] = 1;
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var percent = percentages.Values.Sum();
percent /= list.Count;
progress.Report((90 * percent) + 10);
}
}
}));
}
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cancellationToken.ThrowIfCancellationRequested();
await Task.WhenAll(tasks).ConfigureAwait(false);
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}
/// <summary>
/// Get the children of this folder from the actual file system
/// </summary>
/// <returns>IEnumerable{BaseItem}.</returns>
protected virtual IEnumerable<BaseItem> GetNonCachedChildren()
{
IEnumerable<FileSystemInfo> fileSystemChildren;
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try
{
fileSystemChildren = ResolveArgs.FileSystemChildren;
}
catch (IOException ex)
{
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Logger.ErrorException("Error getting ResolveArgs for {0}", ex, Path);
return new List<BaseItem>();
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}
return LibraryManager.ResolvePaths<BaseItem>(fileSystemChildren, this);
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}
/// <summary>
/// Get our children from the repo - stubbed for now
/// </summary>
/// <returns>IEnumerable{BaseItem}.</returns>
protected virtual IEnumerable<BaseItem> GetCachedChildren()
{
return LibraryManager.RetrieveChildren(this).Select(i => i is IByReferenceItem ? LibraryManager.GetOrAddByReferenceItem(i) : i);
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}
/// <summary>
/// Gets allowed children of an item
/// </summary>
/// <param name="user">The user.</param>
/// <param name="indexBy">The index by.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
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public virtual IEnumerable<BaseItem> GetChildren(User user, string indexBy = null)
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{
if (user == null)
{
throw new ArgumentNullException();
}
//the true root should return our users root folder children
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if (IsPhysicalRoot) return user.RootFolder.GetChildren(user, indexBy);
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IEnumerable<BaseItem> result = null;
if (!string.IsNullOrEmpty(indexBy))
{
result = GetIndexedChildren(user, indexBy);
}
// If indexed is false or the indexing function is null
return result ?? (Children.Where(c => c.IsVisible(user)));
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}
/// <summary>
/// Gets allowed recursive children of an item
/// </summary>
/// <param name="user">The user.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public IEnumerable<BaseItem> GetRecursiveChildren(User user)
{
if (user == null)
{
throw new ArgumentNullException();
}
foreach (var item in GetChildren(user))
{
yield return item;
var subFolder = item as Folder;
if (subFolder != null)
{
foreach (var subitem in subFolder.GetRecursiveChildren(user))
{
yield return subitem;
}
}
}
}
/// <summary>
/// Folders need to validate and refresh
/// </summary>
/// <returns>Task.</returns>
public override async Task ChangedExternally()
{
await base.ChangedExternally().ConfigureAwait(false);
var progress = new Progress<double>();
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await ValidateChildren(progress, CancellationToken.None).ConfigureAwait(false);
}
/// <summary>
/// Marks the item as either played or unplayed
/// </summary>
/// <param name="user">The user.</param>
/// <param name="wasPlayed">if set to <c>true</c> [was played].</param>
/// <param name="userManager">The user manager.</param>
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/// <returns>Task.</returns>
public override async Task SetPlayedStatus(User user, bool wasPlayed, IUserDataRepository userManager)
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{
// Sweep through recursively and update status
var tasks = GetRecursiveChildren(user).Where(i => !i.IsFolder).Select(c => c.SetPlayedStatus(user, wasPlayed, userManager));
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await Task.WhenAll(tasks).ConfigureAwait(false);
}
/// <summary>
/// Finds an item by path, recursively
/// </summary>
/// <param name="path">The path.</param>
/// <returns>BaseItem.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public BaseItem FindByPath(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException();
}
try
{
if (ResolveArgs.PhysicalLocations.Contains(path, StringComparer.OrdinalIgnoreCase))
{
return this;
}
}
catch (IOException ex)
{
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Logger.ErrorException("Error getting ResolveArgs for {0}", ex, Path);
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}
//this should be functionally equivilent to what was here since it is IEnum and works on a thread-safe copy
return RecursiveChildren.FirstOrDefault(i =>
{
try
{
return i.ResolveArgs.PhysicalLocations.Contains(path, StringComparer.OrdinalIgnoreCase);
}
catch (IOException ex)
{
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Logger.ErrorException("Error getting ResolveArgs for {0}", ex, Path);
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return false;
}
});
}
}
}