jellyfin/MediaBrowser.Controller/Entities/Folder.cs
2014-03-03 00:11:03 -05:00

1111 lines
40 KiB
C#

using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.Progress;
using MediaBrowser.Controller.Entities.TV;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Localization;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Entities;
using MoreLinq;
using System;
using System.Collections;
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, IHasThemeMedia
{
public static IUserManager UserManager { get; set; }
public List<Guid> ThemeSongIds { get; set; }
public List<Guid> ThemeVideoIds { get; set; }
public Folder()
{
LinkedChildren = new List<LinkedChild>();
ThemeSongIds = new List<Guid>();
ThemeVideoIds = new List<Guid>();
}
/// <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;
}
}
public virtual List<LinkedChild> LinkedChildren { get; set; }
protected virtual bool SupportsShortcutChildren
{
get { return true; }
}
/// <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)
{
item.Parent = this;
if (item.Id == Guid.Empty)
{
item.Id = item.Path.GetMBId(item.GetType());
}
if (ActualChildren.Any(i => i.Id == item.Id))
{
throw new ArgumentException(string.Format("A child with the Id {0} already exists.", item.Id));
}
if (item.DateCreated == DateTime.MinValue)
{
item.DateCreated = DateTime.UtcNow;
}
if (item.DateModified == DateTime.MinValue)
{
item.DateModified = DateTime.UtcNow;
}
AddChildInternal(item);
await LibraryManager.CreateItem(item, cancellationToken).ConfigureAwait(false);
await ItemRepository.SaveChildren(Id, ActualChildren.Select(i => i.Id).ToList(), cancellationToken).ConfigureAwait(false);
}
protected void AddChildrenInternal(IEnumerable<BaseItem> children)
{
lock (_childrenSyncLock)
{
var newChildren = ActualChildren.ToList();
newChildren.AddRange(children);
_children = newChildren;
}
}
protected void AddChildInternal(BaseItem child)
{
lock (_childrenSyncLock)
{
var newChildren = ActualChildren.ToList();
newChildren.Add(child);
_children = newChildren;
}
}
protected void RemoveChildrenInternal(IEnumerable<BaseItem> children)
{
var ids = children.Select(i => i.Id).ToList();
lock (_childrenSyncLock)
{
_children = ActualChildren.Where(i => !ids.Contains(i.Id)).ToList();
}
}
protected void ClearChildrenInternal()
{
lock (_childrenSyncLock)
{
_children = new List<BaseItem>();
}
}
/// <summary>
/// Never want folders to be blocked by "BlockNotRated"
/// </summary>
[IgnoreDataMember]
public override string OfficialRatingForComparison
{
get
{
if (this is Series)
{
return base.OfficialRatingForComparison;
}
return !string.IsNullOrEmpty(base.OfficialRatingForComparison) ? base.OfficialRatingForComparison : "None";
}
}
/// <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)
{
RemoveChildrenInternal(new[] { item });
item.Parent = null;
return ItemRepository.SaveChildren(Id, ActualChildren.Select(i => i.Id).ToList(), cancellationToken);
}
/// <summary>
/// Clears the children.
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
public Task ClearChildren(CancellationToken cancellationToken)
{
var items = ActualChildren.ToList();
ClearChildrenInternal();
foreach (var item in items)
{
LibraryManager.ReportItemRemoved(item);
}
return ItemRepository.SaveChildren(Id, ActualChildren.Select(i => i.Id).ToList(), cancellationToken);
}
#region Indexing
/// <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 IEnumerable<string> GetIndexByOptions()
{
return new List<string> {
{LocalizedStrings.Instance.GetString("NoneDispPref")},
{LocalizedStrings.Instance.GetString("PerformerDispPref")},
{LocalizedStrings.Instance.GetString("GenreDispPref")},
{LocalizedStrings.Instance.GetString("DirectorDispPref")},
{LocalizedStrings.Instance.GetString("YearDispPref")},
{LocalizedStrings.Instance.GetString("StudioDispPref")}
};
}
/// <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 GetIndexByOptions(); }
}
#endregion
/// <summary>
/// The children
/// </summary>
private IReadOnlyList<BaseItem> _children;
/// <summary>
/// The _children sync lock
/// </summary>
private readonly object _childrenSyncLock = new object();
/// <summary>
/// Gets or sets the actual children.
/// </summary>
/// <value>The actual children.</value>
protected virtual IEnumerable<BaseItem> ActualChildren
{
get
{
return _children ?? (_children = LoadChildrenInternal());
}
}
/// <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
{
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 { return GetRecursiveChildren(); }
}
public override bool IsVisible(User user)
{
if (this is ICollectionFolder)
{
if (user.Configuration.BlockedMediaFolders.Contains(Name, StringComparer.OrdinalIgnoreCase))
{
return false;
}
}
return base.IsVisible(user);
}
private List<BaseItem> LoadChildrenInternal()
{
return LoadChildren().ToList();
}
/// <summary>
/// Loads our children. Validation will occur externally.
/// We want this sychronous.
/// </summary>
protected virtual IEnumerable<BaseItem> LoadChildren()
{
//just load our children from the repo - the library will be validated and maintained in other processes
return GetCachedChildren();
}
public Task ValidateChildren(IProgress<double> progress, CancellationToken cancellationToken)
{
return ValidateChildren(progress, cancellationToken, new MetadataRefreshOptions());
}
/// <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="metadataRefreshOptions">The metadata refresh options.</param>
/// <param name="recursive">if set to <c>true</c> [recursive].</param>
/// <returns>Task.</returns>
public Task ValidateChildren(IProgress<double> progress, CancellationToken cancellationToken, MetadataRefreshOptions metadataRefreshOptions, bool recursive = true)
{
metadataRefreshOptions.DirectoryService = metadataRefreshOptions.DirectoryService ?? new DirectoryService(Logger);
return ValidateChildrenWithCancellationSupport(progress, cancellationToken, recursive, true, metadataRefreshOptions, metadataRefreshOptions.DirectoryService);
}
private Task ValidateChildrenWithCancellationSupport(IProgress<double> progress, CancellationToken cancellationToken, bool recursive, bool refreshChildMetadata, MetadataRefreshOptions refreshOptions, IDirectoryService directoryService)
{
return ValidateChildrenInternal(progress, cancellationToken, recursive, refreshChildMetadata, refreshOptions, directoryService);
}
private Dictionary<Guid, BaseItem> GetActualChildrenDictionary()
{
var dictionary = new Dictionary<Guid, BaseItem>();
foreach (var child in ActualChildren)
{
var id = child.Id;
if (dictionary.ContainsKey(id))
{
Logger.Error("Found folder containing items with duplicate id. Path: {0}, Child Name: {1}",
Path ?? Name,
child.Path ?? child.Name);
}
else
{
dictionary[id] = child;
}
}
return dictionary;
}
private bool IsValidFromResolver(BaseItem current, BaseItem newItem)
{
var currentAsPlaceHolder = current as ISupportsPlaceHolders;
if (currentAsPlaceHolder != null)
{
var newHasPlaceHolder = newItem as ISupportsPlaceHolders;
if (newHasPlaceHolder != null)
{
if (currentAsPlaceHolder.IsPlaceHolder != newHasPlaceHolder.IsPlaceHolder)
{
return false;
}
}
}
return current.IsInMixedFolder == newItem.IsInMixedFolder;
}
/// <summary>
/// Validates the children internal.
/// </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="refreshChildMetadata">if set to <c>true</c> [refresh child metadata].</param>
/// <param name="refreshOptions">The refresh options.</param>
/// <param name="directoryService">The directory service.</param>
/// <returns>Task.</returns>
protected async virtual Task ValidateChildrenInternal(IProgress<double> progress, CancellationToken cancellationToken, bool recursive, bool refreshChildMetadata, MetadataRefreshOptions refreshOptions, IDirectoryService directoryService)
{
var locationType = LocationType;
cancellationToken.ThrowIfCancellationRequested();
var validChildren = new List<BaseItem>();
if (locationType != LocationType.Remote && locationType != LocationType.Virtual)
{
IEnumerable<BaseItem> nonCachedChildren;
try
{
nonCachedChildren = GetNonCachedChildren(directoryService);
}
catch (IOException ex)
{
nonCachedChildren = new BaseItem[] { };
Logger.ErrorException("Error getting file system entries for {0}", ex, Path);
}
if (nonCachedChildren == null) return; //nothing to validate
progress.Report(5);
//build a dictionary of the current children we have now by Id so we can compare quickly and easily
var currentChildren = GetActualChildrenDictionary();
//create a list for our validated children
var newItems = new List<BaseItem>();
cancellationToken.ThrowIfCancellationRequested();
foreach (var child in nonCachedChildren)
{
BaseItem currentChild;
if (currentChildren.TryGetValue(child.Id, out currentChild) && IsValidFromResolver(currentChild, child))
{
var currentChildLocationType = currentChild.LocationType;
if (currentChildLocationType != LocationType.Remote &&
currentChildLocationType != LocationType.Virtual)
{
currentChild.DateModified = child.DateModified;
}
currentChild.IsOffline = false;
}
else
{
//brand new item - needs to be added
newItems.Add(child);
}
validChildren.Add(currentChild);
}
// If any items were added or removed....
if (newItems.Count > 0 || currentChildren.Count != validChildren.Count)
{
// That's all the new and changed ones - now see if there are any that are missing
var itemsRemoved = currentChildren.Values.Except(validChildren).ToList();
var actualRemovals = new List<BaseItem>();
foreach (var item in itemsRemoved)
{
if (item.LocationType == LocationType.Virtual ||
item.LocationType == LocationType.Remote)
{
// Don't remove these because there's no way to accurately validate them.
validChildren.Add(item);
}
else if (!string.IsNullOrEmpty(item.Path) && IsPathOffline(item.Path))
{
item.IsOffline = true;
validChildren.Add(item);
}
else
{
item.IsOffline = false;
actualRemovals.Add(item);
}
}
if (actualRemovals.Count > 0)
{
RemoveChildrenInternal(actualRemovals);
foreach (var item in actualRemovals)
{
LibraryManager.ReportItemRemoved(item);
}
}
await LibraryManager.CreateItems(newItems, cancellationToken).ConfigureAwait(false);
AddChildrenInternal(newItems);
await ItemRepository.SaveChildren(Id, ActualChildren.Select(i => i.Id).ToList(), cancellationToken).ConfigureAwait(false);
}
}
progress.Report(10);
cancellationToken.ThrowIfCancellationRequested();
if (recursive)
{
await ValidateSubFolders(ActualChildren.OfType<Folder>().ToList(), directoryService, progress, cancellationToken).ConfigureAwait(false);
}
progress.Report(20);
if (refreshChildMetadata)
{
var container = this as IMetadataContainer;
var innerProgress = new ActionableProgress<double>();
innerProgress.RegisterAction(p => progress.Report((.80 * p) + 20));
if (container != null)
{
await container.RefreshAllMetadata(refreshOptions, innerProgress, cancellationToken).ConfigureAwait(false);
}
else
{
await RefreshMetadataRecursive(refreshOptions, recursive, innerProgress, cancellationToken);
}
}
progress.Report(100);
}
private async Task RefreshMetadataRecursive(MetadataRefreshOptions refreshOptions, bool recursive, IProgress<double> progress, CancellationToken cancellationToken)
{
var children = ActualChildren.ToList();
var percentages = new Dictionary<Guid, double>(children.Count);
var tasks = new List<Task>();
foreach (var child in children)
{
if (tasks.Count >= 3)
{
await Task.WhenAll(tasks).ConfigureAwait(false);
tasks.Clear();
}
cancellationToken.ThrowIfCancellationRequested();
var innerProgress = new ActionableProgress<double>();
// Avoid implicitly captured closure
var currentChild = child;
innerProgress.RegisterAction(p =>
{
lock (percentages)
{
percentages[currentChild.Id] = p / 100;
var percent = percentages.Values.Sum();
percent /= children.Count;
percent *= 100;
progress.Report(percent);
}
});
if (child.IsFolder)
{
await RefreshChildMetadata(child, refreshOptions, recursive, innerProgress, cancellationToken)
.ConfigureAwait(false);
}
else
{
// Avoid implicitly captured closure
var taskChild = child;
tasks.Add(Task.Run(async () => await RefreshChildMetadata(taskChild, refreshOptions, false, innerProgress, cancellationToken).ConfigureAwait(false), cancellationToken));
}
}
await Task.WhenAll(tasks).ConfigureAwait(false);
progress.Report(100);
}
private async Task RefreshChildMetadata(BaseItem child, MetadataRefreshOptions refreshOptions, bool recursive, IProgress<double> progress, CancellationToken cancellationToken)
{
var container = child as IMetadataContainer;
if (container != null)
{
await container.RefreshAllMetadata(refreshOptions, progress, cancellationToken).ConfigureAwait(false);
}
else
{
await child.RefreshMetadata(refreshOptions, cancellationToken).ConfigureAwait(false);
if (recursive)
{
var folder = child as Folder;
if (folder != null)
{
await folder.RefreshMetadataRecursive(refreshOptions, true, progress, cancellationToken);
}
}
}
progress.Report(100);
}
/// <summary>
/// Refreshes the children.
/// </summary>
/// <param name="children">The children.</param>
/// <param name="directoryService">The directory service.</param>
/// <param name="progress">The progress.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
private async Task ValidateSubFolders(IList<Folder> children, IDirectoryService directoryService, IProgress<double> progress, CancellationToken cancellationToken)
{
var list = children;
var childCount = list.Count;
var percentages = new Dictionary<Guid, double>(list.Count);
foreach (var item in list)
{
cancellationToken.ThrowIfCancellationRequested();
var child = item;
var innerProgress = new ActionableProgress<double>();
innerProgress.RegisterAction(p =>
{
lock (percentages)
{
percentages[child.Id] = p / 100;
var percent = percentages.Values.Sum();
percent /= childCount;
progress.Report((10 * percent) + 10);
}
});
await child.ValidateChildrenWithCancellationSupport(innerProgress, cancellationToken, true, false, null, directoryService)
.ConfigureAwait(false);
}
}
/// <summary>
/// Determines whether the specified path is offline.
/// </summary>
/// <param name="path">The path.</param>
/// <returns><c>true</c> if the specified path is offline; otherwise, <c>false</c>.</returns>
private bool IsPathOffline(string path)
{
if (File.Exists(path))
{
return false;
}
var originalPath = path;
// Depending on whether the path is local or unc, it may return either null or '\' at the top
while (!string.IsNullOrEmpty(path) && path.Length > 1)
{
if (Directory.Exists(path))
{
return false;
}
path = System.IO.Path.GetDirectoryName(path);
}
if (ContainsPath(LibraryManager.GetDefaultVirtualFolders(), originalPath))
{
return true;
}
return UserManager.Users.Any(user => ContainsPath(LibraryManager.GetVirtualFolders(user), originalPath));
}
/// <summary>
/// Determines whether the specified folders contains path.
/// </summary>
/// <param name="folders">The folders.</param>
/// <param name="path">The path.</param>
/// <returns><c>true</c> if the specified folders contains path; otherwise, <c>false</c>.</returns>
private bool ContainsPath(IEnumerable<VirtualFolderInfo> folders, string path)
{
return folders.SelectMany(i => i.Locations).Any(i => ContainsPath(i, path));
}
private bool ContainsPath(string parent, string path)
{
return string.Equals(parent, path, StringComparison.OrdinalIgnoreCase) || FileSystem.ContainsSubPath(parent, path);
}
/// <summary>
/// Get the children of this folder from the actual file system
/// </summary>
/// <returns>IEnumerable{BaseItem}.</returns>
protected virtual IEnumerable<BaseItem> GetNonCachedChildren(IDirectoryService directoryService)
{
return LibraryManager.ResolvePaths<BaseItem>(GetFileSystemChildren(directoryService), directoryService, this);
}
/// <summary>
/// Get our children from the repo - stubbed for now
/// </summary>
/// <returns>IEnumerable{BaseItem}.</returns>
protected IEnumerable<BaseItem> GetCachedChildren()
{
return ItemRepository.GetChildren(Id).Select(RetrieveChild).Where(i => i != null);
}
/// <summary>
/// Retrieves the child.
/// </summary>
/// <param name="child">The child.</param>
/// <returns>BaseItem.</returns>
private BaseItem RetrieveChild(Guid child)
{
var item = LibraryManager.RetrieveItem(child);
if (item != null)
{
if (item is IByReferenceItem)
{
return LibraryManager.GetOrAddByReferenceItem(item);
}
item.Parent = this;
}
return item;
}
/// <summary>
/// Gets allowed children of an item
/// </summary>
/// <param name="user">The user.</param>
/// <param name="includeLinkedChildren">if set to <c>true</c> [include linked children].</param>
/// <returns>IEnumerable{BaseItem}.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public virtual IEnumerable<BaseItem> GetChildren(User user, bool includeLinkedChildren)
{
if (user == null)
{
throw new ArgumentNullException();
}
//the true root should return our users root folder children
if (IsPhysicalRoot) return user.RootFolder.GetChildren(user, includeLinkedChildren);
var list = new List<BaseItem>();
AddChildrenToList(user, includeLinkedChildren, list, false, null);
return list;
}
/// <summary>
/// Adds the children to list.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="includeLinkedChildren">if set to <c>true</c> [include linked children].</param>
/// <param name="list">The list.</param>
/// <param name="recursive">if set to <c>true</c> [recursive].</param>
/// <param name="filter">The filter.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
private bool AddChildrenToList(User user, bool includeLinkedChildren, List<BaseItem> list, bool recursive, Func<BaseItem, bool> filter)
{
var hasLinkedChildren = false;
foreach (var child in Children)
{
if (child.IsVisible(user))
{
if (filter == null || filter(child))
{
list.Add(child);
}
if (recursive && child.IsFolder)
{
var folder = (Folder)child;
if (folder.AddChildrenToList(user, includeLinkedChildren, list, true, filter))
{
hasLinkedChildren = true;
}
}
}
}
if (includeLinkedChildren)
{
foreach (var child in GetLinkedChildren())
{
if (filter != null && !filter(child))
{
continue;
}
if (child.IsVisible(user))
{
hasLinkedChildren = true;
list.Add(child);
}
}
}
return hasLinkedChildren;
}
/// <summary>
/// Gets allowed recursive children of an item
/// </summary>
/// <param name="user">The user.</param>
/// <param name="includeLinkedChildren">if set to <c>true</c> [include linked children].</param>
/// <returns>IEnumerable{BaseItem}.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public IEnumerable<BaseItem> GetRecursiveChildren(User user, bool includeLinkedChildren = true)
{
return GetRecursiveChildren(user, null, includeLinkedChildren);
}
/// <summary>
/// Gets the recursive children.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="filter">The filter.</param>
/// <param name="includeLinkedChildren">if set to <c>true</c> [include linked children].</param>
/// <returns>IList{BaseItem}.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public IList<BaseItem> GetRecursiveChildren(User user, Func<BaseItem, bool> filter, bool includeLinkedChildren = true)
{
if (user == null)
{
throw new ArgumentNullException("user");
}
var list = new List<BaseItem>();
var hasLinkedChildren = AddChildrenToList(user, includeLinkedChildren, list, true, filter);
return hasLinkedChildren ? list.DistinctBy(i => i.Id).ToList() : list;
}
/// <summary>
/// Gets the recursive children.
/// </summary>
/// <returns>IList{BaseItem}.</returns>
public IList<BaseItem> GetRecursiveChildren()
{
return GetRecursiveChildren(i => true);
}
/// <summary>
/// Gets the recursive children.
/// </summary>
/// <param name="filter">The filter.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
public IList<BaseItem> GetRecursiveChildren(Func<BaseItem, bool> filter)
{
var list = new List<BaseItem>();
AddChildrenToList(list, true, filter);
return list;
}
/// <summary>
/// Adds the children to list.
/// </summary>
/// <param name="list">The list.</param>
/// <param name="recursive">if set to <c>true</c> [recursive].</param>
/// <param name="filter">The filter.</param>
private void AddChildrenToList(List<BaseItem> list, bool recursive, Func<BaseItem, bool> filter)
{
foreach (var child in Children)
{
if (filter == null || filter(child))
{
list.Add(child);
}
if (recursive && child.IsFolder)
{
var folder = (Folder)child;
folder.AddChildrenToList(list, true, filter);
}
}
}
/// <summary>
/// Gets the linked children.
/// </summary>
/// <returns>IEnumerable{BaseItem}.</returns>
public IEnumerable<BaseItem> GetLinkedChildren()
{
return LinkedChildren
.Select(GetLinkedChild)
.Where(i => i != null);
}
/// <summary>
/// Gets the linked child.
/// </summary>
/// <param name="info">The info.</param>
/// <returns>BaseItem.</returns>
private BaseItem GetLinkedChild(LinkedChild info)
{
if (string.IsNullOrEmpty(info.Path))
{
throw new ArgumentException("Encountered linked child with empty path.");
}
BaseItem item = null;
// First get using the cached Id
if (info.ItemId.HasValue)
{
if (info.ItemId.Value == Guid.Empty)
{
return null;
}
item = LibraryManager.GetItemById(info.ItemId.Value);
}
// If still null, search by path
if (item == null)
{
item = LibraryManager.RootFolder.FindByPath(info.Path);
}
// If still null, log
if (item == null)
{
Logger.Warn("Unable to find linked item at {0}", info.Path);
// Don't keep searching over and over
info.ItemId = Guid.Empty;
}
else
{
// Cache the id for next time
info.ItemId = item.Id;
}
return item;
}
protected override async Task<bool> RefreshedOwnedItems(MetadataRefreshOptions options, List<FileSystemInfo> fileSystemChildren, CancellationToken cancellationToken)
{
var changesFound = false;
if (SupportsShortcutChildren && LocationType == LocationType.FileSystem)
{
if (RefreshLinkedChildren(fileSystemChildren))
{
changesFound = true;
}
}
var baseHasChanges = await base.RefreshedOwnedItems(options, fileSystemChildren, cancellationToken).ConfigureAwait(false);
return baseHasChanges || changesFound;
}
/// <summary>
/// Refreshes the linked children.
/// </summary>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
private bool RefreshLinkedChildren(IEnumerable<FileSystemInfo> fileSystemChildren)
{
var currentManualLinks = LinkedChildren.Where(i => i.Type == LinkedChildType.Manual).ToList();
var currentShortcutLinks = LinkedChildren.Where(i => i.Type == LinkedChildType.Shortcut).ToList();
var newShortcutLinks = fileSystemChildren
.Where(i => (i.Attributes & FileAttributes.Directory) != FileAttributes.Directory && FileSystem.IsShortcut(i.FullName))
.Select(i =>
{
try
{
Logger.Debug("Found shortcut at {0}", i.FullName);
var resolvedPath = FileSystem.ResolveShortcut(i.FullName);
if (!string.IsNullOrEmpty(resolvedPath))
{
return new LinkedChild
{
Path = resolvedPath,
Type = LinkedChildType.Shortcut
};
}
Logger.Error("Error resolving shortcut {0}", i.FullName);
return null;
}
catch (IOException ex)
{
Logger.ErrorException("Error resolving shortcut {0}", ex, i.FullName);
return null;
}
})
.Where(i => i != null)
.ToList();
if (!newShortcutLinks.SequenceEqual(currentShortcutLinks, new LinkedChildComparer()))
{
Logger.Info("Shortcut links have changed for {0}", Path);
newShortcutLinks.AddRange(currentManualLinks);
LinkedChildren = newShortcutLinks;
return true;
}
foreach (var child in LinkedChildren)
{
// Reset the cached value
if (child.ItemId.HasValue && child.ItemId.Value == Guid.Empty)
{
child.ItemId = null;
}
}
return false;
}
/// <summary>
/// Folders need to validate and refresh
/// </summary>
/// <returns>Task.</returns>
public override async Task ChangedExternally()
{
var progress = new Progress<double>();
await ValidateChildren(progress, CancellationToken.None).ConfigureAwait(false);
await base.ChangedExternally().ConfigureAwait(false);
}
/// <summary>
/// Marks the played.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="datePlayed">The date played.</param>
/// <param name="userManager">The user manager.</param>
/// <returns>Task.</returns>
public override async Task MarkPlayed(User user, DateTime? datePlayed, IUserDataManager userManager)
{
// Sweep through recursively and update status
var tasks = GetRecursiveChildren(user, true).Where(i => !i.IsFolder && i.LocationType != LocationType.Virtual).Select(c => c.MarkPlayed(user, datePlayed, userManager));
await Task.WhenAll(tasks).ConfigureAwait(false);
}
/// <summary>
/// Marks the unplayed.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="userManager">The user manager.</param>
/// <returns>Task.</returns>
public override async Task MarkUnplayed(User user, IUserDataManager userManager)
{
// Sweep through recursively and update status
var tasks = GetRecursiveChildren(user, true).Where(i => !i.IsFolder && i.LocationType != LocationType.Virtual).Select(c => c.MarkUnplayed(user, userManager));
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();
}
if (string.Equals(Path, path, StringComparison.OrdinalIgnoreCase))
{
return this;
}
if (PhysicalLocations.Contains(path, StringComparer.OrdinalIgnoreCase))
{
return this;
}
return RecursiveChildren.FirstOrDefault(i => string.Equals(i.Path, path, StringComparison.OrdinalIgnoreCase) ||
(!i.IsFolder && !i.IsInMixedFolder && string.Equals(i.ContainingFolderPath, path, StringComparison.OrdinalIgnoreCase)) ||
i.PhysicalLocations.Contains(path, StringComparer.OrdinalIgnoreCase));
}
public override bool IsPlayed(User user)
{
return GetRecursiveChildren(user).Where(i => !i.IsFolder && i.LocationType != LocationType.Virtual)
.All(i => i.IsPlayed(user));
}
public override bool IsUnplayed(User user)
{
return GetRecursiveChildren(user).Where(i => !i.IsFolder && i.LocationType != LocationType.Virtual)
.All(i => i.IsUnplayed(user));
}
}
}