Return SyncPlay group info after creation, add GET group endpoint (#13935)

Emby.Server.Implementations/SyncPlay/SyncPlayManager.cs

@@ -100,7 +100,7 @@ namespace Emby.Server.Implementations.SyncPlay
         }
 
         /// <inheritdoc />
-        public void NewGroup(SessionInfo session, NewGroupRequest request, CancellationToken cancellationToken)
+        public GroupInfoDto NewGroup(SessionInfo session, NewGroupRequest request, CancellationToken cancellationToken)
         {
             if (session is null)
             {
@@ -132,6 +132,7 @@ namespace Emby.Server.Implementations.SyncPlay
 
                 UpdateSessionsCounter(session.UserId, 1);
                 group.CreateGroup(session, request, cancellationToken);
+                return group.GetInfo();
             }
         }
 
@@ -288,6 +289,31 @@ namespace Emby.Server.Implementations.SyncPlay
             return list;
         }
 
+        /// <inheritdoc />
+        public GroupInfoDto GetGroup(SessionInfo session, Guid groupId)
+        {
+            ArgumentNullException.ThrowIfNull(session);
+
+            var user = _userManager.GetUserById(session.UserId);
+
+            lock (_groupsLock)
+            {
+                foreach (var (_, group) in _groups)
+                {
+                    // Locking required as group is not thread-safe.
+                    lock (group)
+                    {
+                        if (group.GroupId.Equals(groupId) && group.HasAccessToPlayQueue(user))
+                        {
+                            return group.GetInfo();
+                        }
+                    }
+                }
+            }
+
+            return null;
+        }
+
         /// <inheritdoc />
         public void HandleRequest(SessionInfo session, IGroupPlaybackRequest request, CancellationToken cancellationToken)
         {

Jellyfin.Api/Controllers/SyncPlayController.cs

@@ -1,9 +1,9 @@
+using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
-using Jellyfin.Api.Constants;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.Models.SyncPlayDtos;
 using MediaBrowser.Common.Api;
@@ -50,17 +50,16 @@ public class SyncPlayController : BaseJellyfinApiController
     /// </summary>
     /// <param name="requestData">The settings of the new group.</param>
     /// <response code="204">New group created.</response>
-    /// <returns>A <see cref="NoContentResult"/> indicating success.</returns>
+    /// <returns>An <see cref="GroupInfoDto"/> for the created group.</returns>
     [HttpPost("New")]
-    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status200OK)]
     [Authorize(Policy = Policies.SyncPlayCreateGroup)]
-    public async Task<ActionResult> SyncPlayCreateGroup(
+    public async Task<ActionResult<GroupInfoDto>> SyncPlayCreateGroup(
         [FromBody, Required] NewGroupRequestDto requestData)
     {
         var currentSession = await RequestHelpers.GetSession(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
         var syncPlayRequest = new NewGroupRequest(requestData.GroupName);
-        _syncPlayManager.NewGroup(currentSession, syncPlayRequest, CancellationToken.None);
-        return NoContent();
+        return Ok(_syncPlayManager.NewGroup(currentSession, syncPlayRequest, CancellationToken.None));
     }
 
     /// <summary>
@@ -112,6 +111,23 @@ public class SyncPlayController : BaseJellyfinApiController
         return Ok(_syncPlayManager.ListGroups(currentSession, syncPlayRequest).AsEnumerable());
     }
 
+    /// <summary>
+    /// Gets a SyncPlay group by id.
+    /// </summary>
+    /// <param name="id">The id of the group.</param>
+    /// <response code="200">Group returned.</response>
+    /// <returns>An <see cref="GroupInfoDto"/> for the requested group.</returns>
+    [HttpGet("{id:guid}")]
+    [ProducesResponseType(StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    [Authorize(Policy = Policies.SyncPlayJoinGroup)]
+    public async Task<ActionResult<GroupInfoDto>> SyncPlayGetGroup([FromRoute] Guid id)
+    {
+        var currentSession = await RequestHelpers.GetSession(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
+        var group = _syncPlayManager.GetGroup(currentSession, id);
+        return group == null ? NotFound() : Ok(group);
+    }
+
     /// <summary>
     /// Request to set new playlist in SyncPlay group.
     /// </summary>

MediaBrowser.Controller/SyncPlay/ISyncPlayManager.cs

@@ -20,7 +20,8 @@ namespace MediaBrowser.Controller.SyncPlay
         /// <param name="session">The session that's creating the group.</param>
         /// <param name="request">The request.</param>
         /// <param name="cancellationToken">The cancellation token.</param>
-        void NewGroup(SessionInfo session, NewGroupRequest request, CancellationToken cancellationToken);
+        /// <returns>The newly created group.</returns>
+        GroupInfoDto NewGroup(SessionInfo session, NewGroupRequest request, CancellationToken cancellationToken);
 
         /// <summary>
         /// Adds the session to a group.
@@ -46,6 +47,14 @@ namespace MediaBrowser.Controller.SyncPlay
         /// <returns>The list of available groups.</returns>
         List<GroupInfoDto> ListGroups(SessionInfo session, ListGroupsRequest request);
 
+        /// <summary>
+        /// Gets available groups for a session by id.
+        /// </summary>
+        /// <param name="session">The session.</param>
+        /// <param name="groupId">The group id.</param>
+        /// <returns>The groups or null.</returns>
+        GroupInfoDto GetGroup(SessionInfo session, Guid groupId);
+
         /// <summary>
         /// Handle a request by a session in a group.
         /// </summary>