Add game rule to restart an empty server after 10 minutes (#2787)

* Add game rule to restart an empty server after 10 minutes

* Add missing localization for time running out

Content.Server/GameTicking/GameRules/RuleInactivityTimeRestart.cs

@@ -0,0 +1,95 @@
+#nullable enable
+using System;
+using System.Threading;
+using Content.Server.Interfaces.Chat;
+using Content.Server.Interfaces.GameTicking;
+using Robust.Server.Interfaces.Player;
+using Robust.Server.Player;
+using Robust.Shared.IoC;
+using Robust.Shared.Localization;
+using Timer = Robust.Shared.Timers.Timer;
+
+namespace Content.Server.GameTicking.GameRules
+{
+    public class RuleInactivityTimeRestart : GameRule
+    {
+        [Dependency] private readonly IGameTicker _gameTicker = default!;
+        [Dependency] private readonly IChatManager _chatManager = default!;
+        [Dependency] private readonly IPlayerManager _playerManager = default!;
+
+        private CancellationTokenSource _timerCancel = new();
+
+        public TimeSpan InactivityMaxTime { get; set; } = TimeSpan.FromMinutes(10);
+        public TimeSpan RoundEndDelay { get; set; } = TimeSpan.FromSeconds(10);
+
+        public override void Added()
+        {
+            base.Added();
+
+            _gameTicker.OnRunLevelChanged += RunLevelChanged;
+            _playerManager.PlayerStatusChanged += PlayerStatusChanged;
+        }
+
+        public override void Removed()
+        {
+            base.Removed();
+
+            _gameTicker.OnRunLevelChanged -= RunLevelChanged;
+            _playerManager.PlayerStatusChanged -= PlayerStatusChanged;
+
+            StopTimer();
+        }
+
+        public void RestartTimer()
+        {
+            _timerCancel.Cancel();
+            _timerCancel = new CancellationTokenSource();
+            Timer.Spawn(InactivityMaxTime, TimerFired, _timerCancel.Token);
+        }
+
+        public void StopTimer()
+        {
+            _timerCancel.Cancel();
+        }
+
+        private void TimerFired()
+        {
+            _gameTicker.EndRound(Loc.GetString("Time has run out!"));
+
+            _chatManager.DispatchServerAnnouncement(Loc.GetString("Restarting in {0} seconds.", (int) RoundEndDelay.TotalSeconds));
+
+            Timer.Spawn(RoundEndDelay, () => _gameTicker.RestartRound());
+        }
+
+        private void RunLevelChanged(GameRunLevelChangedEventArgs args)
+        {
+            switch (args.NewRunLevel)
+            {
+                case GameRunLevel.InRound:
+                    RestartTimer();
+                    break;
+                case GameRunLevel.PreRoundLobby:
+                case GameRunLevel.PostRound:
+                    StopTimer();
+                    break;
+            }
+        }
+
+        private void PlayerStatusChanged(object? sender, SessionStatusEventArgs e)
+        {
+            if (_gameTicker.RunLevel != GameRunLevel.InRound)
+            {
+                return;
+            }
+
+            if (_playerManager.PlayerCount == 0)
+            {
+                RestartTimer();
+            }
+            else
+            {
+                StopTimer();
+            }
+        }
+    }
+}

Content.Server/GameTicking/GameRules/RuleMaxTimeRestart.cs

@@ -47,7 +47,7 @@ namespace Content.Server.GameTicking.GameRules
 
         private void TimerFired()
         {
-            _gameTicker.EndRound("Time has run out!");
+            _gameTicker.EndRound(Loc.GetString("Time has run out!"));
 
             _chatManager.DispatchServerAnnouncement(Loc.GetString("Restarting in {0} seconds.", (int) RoundEndDelay.TotalSeconds));