Geiger counter (#12082)

Content.Shared/Radiation/Systems/SharedGeigerSystem.cs

@@ -0,0 +1,44 @@
+using Content.Shared.Examine;
+using Content.Shared.Radiation.Components;
+
+namespace Content.Shared.Radiation.Systems;
+
+public abstract class SharedGeigerSystem : EntitySystem
+{
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<GeigerComponent, ExaminedEvent>(OnExamine);
+    }
+
+    private void OnExamine(EntityUid uid, GeigerComponent component, ExaminedEvent args)
+    {
+        if (!component.ShowExamine || !component.IsEnabled || !args.IsInDetailsRange)
+            return;
+
+        var currentRads = component.CurrentRadiation;
+        var rads = currentRads.ToString("N1");
+        var color = LevelToColor(component.DangerLevel);
+        var msg = Loc.GetString("geiger-component-examine",
+            ("rads", rads), ("color", color));
+        args.PushMarkup(msg);
+    }
+
+    public static Color LevelToColor(GeigerDangerLevel level)
+    {
+        switch (level)
+        {
+            case GeigerDangerLevel.None:
+                return Color.Green;
+            case GeigerDangerLevel.Low:
+                return Color.Yellow;
+            case GeigerDangerLevel.Med:
+                return Color.DarkOrange;
+            case GeigerDangerLevel.High:
+            case GeigerDangerLevel.Extreme:
+                return Color.Red;
+            default:
+                return Color.White;
+        }
+    }
+}