Merge branch 'master' into Preservation-of-Watched-Status-on-Re-watch

1 files changed, 35 insertions, 7 deletions

diff --git a/Emby.Server.Implementations/Playlists/PlaylistManager.cs b/Emby.Server.Implementations/Playlists/PlaylistManager.cs
index 1577c5c9c7..409414139c 100644
--- a/Emby.Server.Implementations/Playlists/PlaylistManager.cs
+++ b/Emby.Server.Implementations/Playlists/PlaylistManager.cs
@@ -198,17 +198,22 @@ namespace Emby.Server.Implementations.Playlists
             return Playlist.GetPlaylistItems(items, user, options);
         }
 
-        public Task AddItemToPlaylistAsync(Guid playlistId, IReadOnlyCollection<Guid> itemIds, Guid userId)
+        public Task AddItemToPlaylistAsync(Guid playlistId, IReadOnlyCollection<Guid> itemIds, int? position, Guid userId)
         {
             var user = userId.IsEmpty() ? null : _userManager.GetUserById(userId);
 
-            return AddToPlaylistInternal(playlistId, itemIds, user, new DtoOptions(false)
-            {
-                EnableImages = true
-            });
+            return AddToPlaylistInternal(
+                playlistId,
+                itemIds,
+                user,
+                new DtoOptions(false)
+                {
+                    EnableImages = true
+                },
+                position);
         }
 
-        private async Task AddToPlaylistInternal(Guid playlistId, IReadOnlyCollection<Guid> newItemIds, User user, DtoOptions options)
+        private async Task AddToPlaylistInternal(Guid playlistId, IReadOnlyCollection<Guid> newItemIds, User user, DtoOptions options, int? position = null)
         {
             // Retrieve the existing playlist
             var playlist = _libraryManager.GetItemById(playlistId) as Playlist
@@ -243,7 +248,30 @@ namespace Emby.Server.Implementations.Playlists
             }
 
             // Update the playlist in the repository
-            playlist.LinkedChildren = [.. playlist.LinkedChildren, .. childrenToAdd];
+            if (position.HasValue)
+            {
+                if (position.Value <= 0)
+                {
+                    playlist.LinkedChildren = [.. childrenToAdd, .. playlist.LinkedChildren];
+                }
+                else if (position.Value >= playlist.LinkedChildren.Length)
+                {
+                    playlist.LinkedChildren = [.. playlist.LinkedChildren, .. childrenToAdd];
+                }
+                else
+                {
+                    playlist.LinkedChildren = [
+                        .. playlist.LinkedChildren[0..position.Value],
+                        .. childrenToAdd,
+                        .. playlist.LinkedChildren[position.Value..playlist.LinkedChildren.Length]
+                    ];
+                }
+            }
+            else
+            {
+                playlist.LinkedChildren = [.. playlist.LinkedChildren, .. childrenToAdd];
+            }
+
             playlist.DateLastMediaAdded = DateTime.UtcNow;
 
             await UpdatePlaylistInternal(playlist).ConfigureAwait(false);