Station alert levels (#8226)

Content.Shared/AlertLevel/AlertLevelDisplayComponent.cs

@@ -0,0 +1,8 @@
+namespace Content.Shared.AlertLevel;
+
+[RegisterComponent]
+public sealed class AlertLevelDisplayComponent : Component
+{
+    [DataField("alertVisuals")]
+    public readonly Dictionary<string, string> AlertVisuals = new();
+}

Content.Shared/AlertLevel/SharedAlertLevelDisplay.cs

@@ -0,0 +1,10 @@
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.AlertLevel;
+
+[Serializable, NetSerializable]
+public enum AlertLevelDisplay
+{
+    CurrentLevel,
+    Layer
+}

Content.Shared/Communications/SharedCommunicationsConsoleComponent.cs

@@ -14,13 +14,30 @@ namespace Content.Shared.Communications
         public readonly bool CanCall;
         public readonly TimeSpan? ExpectedCountdownEnd;
         public readonly bool CountdownStarted;
+        public List<string>? AlertLevels;
+        public string CurrentAlert;
+        public float CurrentAlertDelay;
 
-        public CommunicationsConsoleInterfaceState(bool canAnnounce, bool canCall, TimeSpan? expectedCountdownEnd = null)
+        public CommunicationsConsoleInterfaceState(bool canAnnounce, bool canCall, List<string>? alertLevels, string currentAlert, float currentAlertDelay, TimeSpan? expectedCountdownEnd = null)
         {
             CanAnnounce = canAnnounce;
             CanCall = canCall;
             ExpectedCountdownEnd = expectedCountdownEnd;
             CountdownStarted = expectedCountdownEnd != null;
+            AlertLevels = alertLevels;
+            CurrentAlert = currentAlert;
+            CurrentAlertDelay = currentAlertDelay;
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public sealed class CommunicationsConsoleSelectAlertLevelMessage : BoundUserInterfaceMessage
+    {
+        public readonly string Level;
+
+        public CommunicationsConsoleSelectAlertLevelMessage(string level)
+        {
+            Level = level;
         }
     }