jellyfin/MediaBrowser.Controller/Entities/Folder.cs
2013-02-21 16:06:23 -05:00

1048 lines
40 KiB
C#

using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.Logging;
using MediaBrowser.Common.Win32;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Localization;
using MediaBrowser.Controller.Resolvers;
using MediaBrowser.Controller.Sorting;
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;
using MediaBrowser.Model.Tasks;
using SortOrder = MediaBrowser.Controller.Sorting.SortOrder;
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]
public virtual Guid DisplayPrefsId
{
get
{
var thisType = GetType();
return thisType == typeof(Folder) ? Id : thisType.FullName.GetMD5();
}
}
/// <summary>
/// The _display prefs
/// </summary>
private IEnumerable<DisplayPreferences> _displayPrefs;
/// <summary>
/// The _display prefs initialized
/// </summary>
private bool _displayPrefsInitialized;
/// <summary>
/// The _display prefs sync lock
/// </summary>
private object _displayPrefsSyncLock = new object();
/// <summary>
/// Gets the display prefs.
/// </summary>
/// <value>The display prefs.</value>
[IgnoreDataMember]
public IEnumerable<DisplayPreferences> DisplayPrefs
{
get
{
// Call ToList to exhaust the stream because we'll be iterating over this multiple times
LazyInitializer.EnsureInitialized(ref _displayPrefs, ref _displayPrefsInitialized, ref _displayPrefsSyncLock, () => Kernel.Instance.DisplayPreferencesRepository.RetrieveDisplayPrefs(this).ToList());
return _displayPrefs;
}
private set
{
_displayPrefs = value;
if (value == null)
{
_displayPrefsInitialized = false;
}
}
}
/// <summary>
/// Gets the display prefs.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="createIfNull">if set to <c>true</c> [create if null].</param>
/// <returns>DisplayPreferences.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public DisplayPreferences GetDisplayPrefs(User user, bool createIfNull)
{
if (user == null)
{
throw new ArgumentNullException();
}
if (DisplayPrefs == null)
{
if (!createIfNull)
{
return null;
}
AddOrUpdateDisplayPrefs(user, new DisplayPreferences { UserId = user.Id });
}
var data = DisplayPrefs.FirstOrDefault(u => u.UserId == user.Id);
if (data == null && createIfNull)
{
data = new DisplayPreferences { UserId = user.Id };
AddOrUpdateDisplayPrefs(user, data);
}
return data;
}
/// <summary>
/// Adds the or update display prefs.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="data">The data.</param>
/// <exception cref="System.ArgumentNullException"></exception>
public void AddOrUpdateDisplayPrefs(User user, DisplayPreferences data)
{
if (user == null)
{
throw new ArgumentNullException();
}
if (data == null)
{
throw new ArgumentNullException();
}
data.UserId = user.Id;
if (DisplayPrefs == null)
{
DisplayPrefs = new[] { data };
}
else
{
var list = DisplayPrefs.Where(u => u.UserId != user.Id).ToList();
list.Add(data);
DisplayPrefs = list;
}
}
#region Sorting
/// <summary>
/// The _sort by options
/// </summary>
private Dictionary<string, IComparer<BaseItem>> _sortByOptions;
/// <summary>
/// Dictionary of sort options - consists of a display value (localized) and an IComparer of BaseItem
/// </summary>
/// <value>The sort by options.</value>
[IgnoreDataMember]
public Dictionary<string, IComparer<BaseItem>> SortByOptions
{
get { return _sortByOptions ?? (_sortByOptions = GetSortByOptions()); }
}
/// <summary>
/// Returns the valid set of sort by options for this folder type.
/// Override or extend to modify.
/// </summary>
/// <returns>Dictionary{System.StringIComparer{BaseItem}}.</returns>
protected virtual Dictionary<string, IComparer<BaseItem>> GetSortByOptions()
{
return new Dictionary<string, IComparer<BaseItem>> {
{LocalizedStrings.Instance.GetString("NameDispPref"), new BaseItemComparer(SortOrder.Name, Logger)},
{LocalizedStrings.Instance.GetString("DateDispPref"), new BaseItemComparer(SortOrder.Date, Logger)},
{LocalizedStrings.Instance.GetString("RatingDispPref"), new BaseItemComparer(SortOrder.Rating, Logger)},
{LocalizedStrings.Instance.GetString("RuntimeDispPref"), new BaseItemComparer(SortOrder.Runtime, Logger)},
{LocalizedStrings.Instance.GetString("YearDispPref"), new BaseItemComparer(SortOrder.Year, Logger)}
};
}
/// <summary>
/// Get a sorting comparer by name
/// </summary>
/// <param name="name">The name.</param>
/// <returns>IComparer{BaseItem}.</returns>
private IComparer<BaseItem> GetSortingFunction(string name)
{
IComparer<BaseItem> sorting;
SortByOptions.TryGetValue(name ?? "", out sorting);
return sorting ?? new BaseItemComparer(SortOrder.Name, Logger);
}
/// <summary>
/// Get the list of sort by choices for this folder (localized).
/// </summary>
/// <value>The sort by option strings.</value>
[IgnoreDataMember]
public IEnumerable<string> SortByOptionStrings
{
get { return SortByOptions.Keys; }
}
#endregion
#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.MusicArtist }, LocalizedStrings.Instance.GetString("PerformerDispPref"));
}
/// <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 }, LocalizedStrings.Instance.GetString("DirectorDispPref"));
}
/// <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="indexName">Name of the index.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
protected IEnumerable<BaseItem> GetIndexByPerson(User user, List<string> personTypes, string indexName)
{
// 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.
using (new Profiler(indexName + " Index Build for " + Name, Logger))
{
// Put this in a local variable to avoid an implicitly captured closure
var currentIndexName = indexName;
var us = this;
var candidates = RecursiveChildren.Where(i => i.IncludeInIndex && i.AllPeople != null).ToList();
return candidates.AsParallel().SelectMany(i => i.AllPeople.Where(p => personTypes.Contains(p.Type))
.Select(a => a.Name))
.Distinct()
.Select(i =>
{
try
{
return Kernel.Instance.LibraryManager.GetPerson(i).Result;
}
catch (IOException ex)
{
Logger.ErrorException("Error getting person {0}", ex, i);
return null;
}
catch (AggregateException ex)
{
Logger.ErrorException("Error getting person {0}", ex, i);
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));
}
}
/// <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.
using (new Profiler("Studio Index Build for " + Name, Logger))
{
var indexName = LocalizedStrings.Instance.GetString("StudioDispPref");
var candidates = RecursiveChildren.Where(i => i.IncludeInIndex && i.Studios != null).ToList();
return candidates.AsParallel().SelectMany(i => i.Studios)
.Distinct()
.Select(i =>
{
try
{
return Kernel.Instance.LibraryManager.GetStudio(i).Result;
}
catch (IOException ex)
{
Logger.ErrorException("Error getting studio {0}", ex, i);
return null;
}
catch (AggregateException ex)
{
Logger.ErrorException("Error getting studio {0}", ex, i);
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.
using (new Profiler("Genre Index Build for " + Name, Logger))
{
var indexName = LocalizedStrings.Instance.GetString("GenreDispPref");
//we need a copy of this so we don't double-recurse
var candidates = RecursiveChildren.Where(i => i.IncludeInIndex && i.Genres != null).ToList();
return candidates.AsParallel().SelectMany(i => i.Genres)
.Distinct()
.Select(i =>
{
try
{
return Kernel.Instance.LibraryManager.GetGenre(i).Result;
}
catch (IOException ex)
{
Logger.ErrorException("Error getting genre {0}", ex, i);
return null;
}
catch (AggregateException ex)
{
Logger.ErrorException("Error getting genre {0}", ex, i);
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.
using (new Profiler("Production Year Index Build for " + Name, Logger))
{
var indexName = LocalizedStrings.Instance.GetString("YearDispPref");
//we need a copy of this so we don't double-recurse
var candidates = RecursiveChildren.Where(i => i.IncludeInIndex && i.ProductionYear.HasValue).ToList();
return candidates.AsParallel().Select(i => i.ProductionYear.Value)
.Distinct()
.Select(i =>
{
try
{
return Kernel.Instance.LibraryManager.GetYear(i).Result;
}
catch (IOException ex)
{
Logger.ErrorException("Error getting year {0}", ex, i);
return null;
}
catch (AggregateException ex)
{
Logger.ErrorException("Error getting year {0}", ex, i);
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 ConcurrentBag<BaseItem> _children;
/// <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 ConcurrentBag<BaseItem> ActualChildren
{
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 ConcurrentBag<BaseItem> Children
{
get
{
return ActualChildren;
}
}
/// <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 ConcurrentBag<BaseItem> LoadChildren()
{
//just load our children from the repo - the library will be validated and maintained in other processes
return new ConcurrentBag<BaseItem>(GetCachedChildren());
}
/// <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>
public async Task ValidateChildren(IProgress<TaskProgress> progress, CancellationToken cancellationToken, bool? recursive = null)
{
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)
{
Logger.Info("ValidateChildren cancelled for " + Name);
// 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>
protected async virtual Task ValidateChildrenInternal(IProgress<TaskProgress> progress, CancellationToken cancellationToken, bool? recursive = null)
{
// Nothing to do here
if (LocationType != LocationType.FileSystem)
{
return;
}
cancellationToken.ThrowIfCancellationRequested();
var changedArgs = new ChildrenChangedEventArgs(this);
//get the current valid children from filesystem (or wherever)
var nonCachedChildren = GetNonCachedChildren();
if (nonCachedChildren == null) return; //nothing to validate
progress.Report(new TaskProgress { PercentComplete = 5 });
//build a dictionary of the current children we have now by Id so we can compare quickly and easily
var currentChildren = ActualChildren.ToDictionary(i => i.Id);
//create a list for our validated children
var validChildren = new ConcurrentBag<Tuple<BaseItem, bool>>();
cancellationToken.ThrowIfCancellationRequested();
Parallel.ForEach(nonCachedChildren, child =>
{
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);
changedArgs.AddUpdatedItem(currentChild);
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
changedArgs.AddNewItem(child);
validChildren.Add(new Tuple<BaseItem, bool>(child, true));
}
});
// If any items were added or removed....
if (!changedArgs.ItemsAdded.IsEmpty || currentChildren.Count != validChildren.Count)
{
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
changedArgs.ItemsRemoved = currentChildren.Values.Except(newChildren).ToList();
foreach (var item in changedArgs.ItemsRemoved)
{
Logger.Info("** " + item.Name + " Removed from library.");
}
var childrenReplaced = false;
if (changedArgs.ItemsRemoved.Count > 0)
{
ActualChildren = new ConcurrentBag<BaseItem>(newChildren);
childrenReplaced = true;
}
var saveTasks = new List<Task>();
foreach (var item in changedArgs.ItemsAdded)
{
Logger.Info("** " + item.Name + " Added to library.");
if (!childrenReplaced)
{
_children.Add(item);
}
saveTasks.Add(Kernel.Instance.ItemRepository.SaveItem(item, CancellationToken.None));
}
await Task.WhenAll(saveTasks).ConfigureAwait(false);
//and save children in repo...
Logger.Info("*** Saving " + newChildren.Count + " children for " + Name);
await Kernel.Instance.ItemRepository.SaveChildren(Id, newChildren, CancellationToken.None).ConfigureAwait(false);
}
if (changedArgs.HasChange)
{
//force the indexes to rebuild next time
IndexCache.Clear();
//and fire event
Kernel.Instance.LibraryManager.OnLibraryChanged(changedArgs);
}
progress.Report(new TaskProgress { PercentComplete = 15 });
cancellationToken.ThrowIfCancellationRequested();
await RefreshChildren(validChildren, progress, cancellationToken, recursive).ConfigureAwait(false);
progress.Report(new TaskProgress { PercentComplete = 100 });
}
/// <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 Task RefreshChildren(IEnumerable<Tuple<BaseItem, bool>> children, IProgress<TaskProgress> progress, CancellationToken cancellationToken, bool? recursive)
{
var numComplete = 0;
var list = children.ToList();
var tasks = list.Select(tuple => Task.Run(async () =>
{
cancellationToken.ThrowIfCancellationRequested();
var child = tuple.Item1;
//refresh it
await child.RefreshMetadata(cancellationToken, resetResolveArgs: child.IsFolder).ConfigureAwait(false);
//and add it to our valid children
//fire an added event...?
//if it is a folder we need to validate its children as well
// Refresh children if a folder and the item changed or recursive is set to true
var refreshChildren = child.IsFolder && (tuple.Item2 || (recursive.HasValue && recursive.Value));
if (refreshChildren)
{
// Don't refresh children if explicitly set to false
if (recursive.HasValue && recursive.Value == false)
{
refreshChildren = false;
}
}
if (refreshChildren)
{
cancellationToken.ThrowIfCancellationRequested();
await ((Folder)child).ValidateChildren(new Progress<TaskProgress> { }, cancellationToken, recursive: recursive).ConfigureAwait(false);
}
lock (progress)
{
numComplete++;
double percent = numComplete;
percent /= list.Count;
progress.Report(new TaskProgress { PercentComplete = (85 * percent) + 15 });
}
}));
cancellationToken.ThrowIfCancellationRequested();
return Task.WhenAll(tasks);
}
/// <summary>
/// Get the children of this folder from the actual file system
/// </summary>
/// <returns>IEnumerable{BaseItem}.</returns>
protected virtual IEnumerable<BaseItem> GetNonCachedChildren()
{
IEnumerable<WIN32_FIND_DATA> fileSystemChildren;
try
{
fileSystemChildren = ResolveArgs.FileSystemChildren;
}
catch (IOException ex)
{
Logger.ErrorException("Error getting ResolveArgs for {0}", ex, Path);
return new List<BaseItem> { };
}
return Kernel.Instance.LibraryManager.GetItems<BaseItem>(fileSystemChildren, this);
}
/// <summary>
/// Get our children from the repo - stubbed for now
/// </summary>
/// <returns>IEnumerable{BaseItem}.</returns>
protected virtual IEnumerable<BaseItem> GetCachedChildren()
{
return Kernel.Instance.ItemRepository.RetrieveChildren(this);
}
/// <summary>
/// Gets allowed children of an item
/// </summary>
/// <param name="user">The user.</param>
/// <param name="indexBy">The index by.</param>
/// <param name="sortBy">The sort by.</param>
/// <param name="sortOrder">The sort order.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public virtual IEnumerable<BaseItem> GetChildren(User user, string indexBy = null, string sortBy = null, Model.Entities.SortOrder? sortOrder = null)
{
if (user == null)
{
throw new ArgumentNullException();
}
//the true root should return our users root folder children
if (IsPhysicalRoot) return user.RootFolder.GetChildren(user, indexBy, sortBy, sortOrder);
IEnumerable<BaseItem> result = null;
if (!string.IsNullOrEmpty(indexBy))
{
result = GetIndexedChildren(user, indexBy);
}
// If indexed is false or the indexing function is null
if (result == null)
{
result = ActualChildren.Where(c => c.IsVisible(user));
}
if (string.IsNullOrEmpty(sortBy))
{
return result;
}
return sortOrder.HasValue && sortOrder.Value == Model.Entities.SortOrder.Descending
? result.OrderByDescending(i => i, GetSortingFunction(sortBy))
: result.OrderBy(i => i, GetSortingFunction(sortBy));
}
/// <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<TaskProgress> { };
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>
/// <returns>Task.</returns>
public override async Task SetPlayedStatus(User user, bool wasPlayed)
{
await base.SetPlayedStatus(user, wasPlayed).ConfigureAwait(false);
// Now sweep through recursively and update status
var tasks = GetChildren(user).Select(c => c.SetPlayedStatus(user, wasPlayed));
await Task.WhenAll(tasks).ConfigureAwait(false);
}
/// <summary>
/// Finds an item by ID, recursively
/// </summary>
/// <param name="id">The id.</param>
/// <param name="user">The user.</param>
/// <returns>BaseItem.</returns>
public override BaseItem FindItemById(Guid id, User user)
{
var result = base.FindItemById(id, user);
if (result != null)
{
return result;
}
var children = user == null ? ActualChildren : GetChildren(user);
foreach (var child in children)
{
result = child.FindItemById(id, user);
if (result != null)
{
return result;
}
}
return null;
}
/// <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)
{
Logger.ErrorException("Error getting ResolveArgs for {0}", ex, Path);
}
//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)
{
Logger.ErrorException("Error getting ResolveArgs for {0}", ex, Path);
return false;
}
});
}
}
}