Lobby Refactor (#7077)

Content.Server/GameTicking/GameTicker.Lobby.cs

@@ -71,7 +71,7 @@ namespace Content.Server.GameTicking
         private TickerLobbyStatusEvent GetStatusMsg(IPlayerSession session)
         {
             _playersInLobby.TryGetValue(session, out var status);
-            return new TickerLobbyStatusEvent(RunLevel != GameRunLevel.PreRoundLobby, LobbySong, status == LobbyPlayerStatus.Ready, _roundStartTime, Paused);
+            return new TickerLobbyStatusEvent(RunLevel != GameRunLevel.PreRoundLobby, LobbySong, LobbyBackground,status == LobbyPlayerStatus.Ready, _roundStartTime, Paused);
         }
 
         private void SendStatusToAll()

Content.Server/GameTicking/GameTicker.LobbyBackground.cs

@@ -0,0 +1,33 @@
+using System.IO;
+using System.Linq;
+using Content.Shared.Audio;
+using Robust.Shared.ContentPack;
+using Robust.Shared.Random;
+using Robust.Shared.Utility;
+using Robust.Shared.ViewVariables;
+
+
+namespace Content.Server.GameTicking;
+
+public sealed partial class GameTicker
+{
+    [Dependency] private readonly IResourceManager _resourceManager = default!;
+
+    [ViewVariables]
+    public string? LobbyBackground { get; private set; }
+
+    [ViewVariables]
+    private List<ResourcePath>? _lobbyBackgrounds;
+
+    private static readonly string[] WhitelistedBackgroundExtensions = new string[] {"png", "jpg", "jpeg"};
+
+    private const string LobbyScreenPath = "/Textures/LobbyScreens";
+
+    private void InitializeLobbyBackground()
+    {
+        _lobbyBackgrounds = _resourceManager.ContentFindFiles(new ResourcePath(LobbyScreenPath)).ToList();
+        _lobbyBackgrounds = _lobbyBackgrounds.FindAll(path => WhitelistedBackgroundExtensions.Contains((path.Extension)));
+        LobbyBackground = _lobbyBackgrounds.Any() ? _robustRandom.Pick(_lobbyBackgrounds).ToString() : null;
+    }
+
+}

Content.Server/GameTicking/GameTicker.cs

@@ -50,6 +50,7 @@ namespace Content.Server.GameTicking
             InitializeCVars();
             InitializePlayer();
             InitializeLobbyMusic();
+            InitializeLobbyBackground();
             InitializeGamePreset();
             InitializeJobController();
             InitializeUpdates();