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Check for duplicates when adding items to a playlist

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This commit is contained in:
Mark Monteiro 2020-03-02 21:12:35 +01:00
parent 1c1484389a
commit dde0277050
1 changed files with 22 additions and 18 deletions
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40
Emby.Server.Implementations/Playlists/PlaylistManager.cs
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@ -189,41 +189,45 @@ namespace Emby.Server.Implementations.Playlists
private void AddToPlaylistInternal(string playlistId, IEnumerable<Guid> itemIds, User user, DtoOptions options) private void AddToPlaylistInternal(string playlistId, IEnumerable<Guid> itemIds, User user, DtoOptions options)
{ {
var playlist = _libraryManager.GetItemById(playlistId) as Playlist; // Retrieve the existing playlist
var playlist = _libraryManager.GetItemById(playlistId) as Playlist
if (playlist == null) ?? throw new ArgumentException("No Playlist exists with Id " + playlistId);
{
throw new ArgumentException("No Playlist exists with the supplied Id");
}
var list = new List<LinkedChild>();
// Retrieve all the items to be added to the playlist
var items = GetPlaylistItems(itemIds, playlist.MediaType, user, options) var items = GetPlaylistItems(itemIds, playlist.MediaType, user, options)
.Where(i => i.SupportsAddingToPlaylist) .Where(i => i.SupportsAddingToPlaylist)
.ToList(); .ToList();
foreach (var item in items) // Remove duplicates from the new items to be added
var existingIds = playlist.LinkedChildren.Select(c => c.ItemId).ToHashSet();
var uniqueItems = items
.Where(i => !existingIds.Contains(i.Id))
.GroupBy(i => i.Id)
.Select(group => group.First())
.ToList();
// Log duplicates that have been ignored, if any
if (uniqueItems.Count != items.Count)
{ {
list.Add(LinkedChild.Create(item)); var numDuplicates = items.Count - uniqueItems.Count;
_logger.LogWarning("Ignored adding {DuplicateCount} duplicate items to playlist {PlaylistName}.", numDuplicates, playlist.Name);
} }
var newList = playlist.LinkedChildren.ToList(); // Update the playlist in the repository
newList.AddRange(list); var linkedItems = uniqueItems.Select(i => LinkedChild.Create(i));
playlist.LinkedChildren = newList.ToArray(); playlist.LinkedChildren = playlist.LinkedChildren.Concat(linkedItems).ToArray();
playlist.UpdateToRepository(ItemUpdateType.MetadataEdit, CancellationToken.None); playlist.UpdateToRepository(ItemUpdateType.MetadataEdit, CancellationToken.None);
// Update the playlist on disk
if (playlist.IsFile) if (playlist.IsFile)
{ {
SavePlaylistFile(playlist); SavePlaylistFile(playlist);
} }
// Refresh playlist metadata
_providerManager.QueueRefresh( _providerManager.QueueRefresh(
playlist.Id, playlist.Id,
new MetadataRefreshOptions(new DirectoryService(_fileSystem)) new MetadataRefreshOptions(new DirectoryService(_fileSystem)) { ForceSave = true },
{
ForceSave = true
},
RefreshPriority.High); RefreshPriority.High);
} }